How to Name Ionic Compounds

Ionic compounds consist of cations (positive ions) and anions (negative ions). Ionic compound nomenclature or naming  is based on the names of the component ions. In all cases, ionic compound naming gives the positively charged cation first, followed by the negatively charged anion. Here are the principal naming conventions for ionic compounds, along with examples to show how they are used: Roman Numerals in Ionic Compound Names A Roman numeral in parentheses, followed by the name of the element, is used for elements that can form more than one positive ion. There is no space between the element name and the parenthesis. This notation is usually seen with metals since they commonly display more than one oxidation state or valence. You can use a chart to see the possible valences for the elements. Fe2 Iron(II)Fe3 Iron(III)Cu Copper(I)Cu2 Copper(II) Example: Fe2O3 is iron(III) oxide. Naming Ionic Compounds Using  -ous and -ic Although Roman numerals are used to denote the ionic charge of cations, it is still common to see and use the endings -ous or -ic. These endings are added to the Latin name of the element (e.g., stannous/stannic for tin) to represent the ions with lesser or greater charge, respectively. The Roman numeral naming convention has wider appeal because many ions have more than two valences. Fe2 FerrousFe3 FerricCu CuprousCu2 Cupric Example: FeCl3 is ferric chloride or iron(III) chloride. Naming Ionic Compounds Using  -ide The -ide ending is added to the name of a monoatomic ion of an element. H- HydrideF- FluorideO2- OxideS2- SulfideN3- NitrideP3- Phosphide Example: Cu3P is copper phosphide or copper(I) phosphide. Naming Ionic Compounds Using  -ite and -ate Some polyatomic anions contain oxygen. These anions are called oxyanions. When an element forms two oxyanions, the one with less oxygen is given a name ending in -ite and the one with more oxygen are given a name that ends in -ate. NO2- NitriteNO3- NitrateSO32- SulfiteSO42- Sulfate Example: KNO2 is potassium nitrite, while KNO3 is potassium nitrate. Naming Ionic Compounds Using hypo- and per- In the case where there is a series of four oxyanions, the hypo- and per- prefixes are used in conjunction with the -ite and -ate suffixes. The hypo- and per- prefixes indicate less oxygen and more oxygen, respectively. ClO- HypochloriteClO2- ChloriteClO3- ChlorateClO4- Perchlorate Example: The bleaching agent sodium hypochlorite is NaClO. It is also sometimes called the sodium salt of hypochlorous acid. Ionic Compounds Containing bi- and di- Hydrogen Polyatomic anions sometimes gain one or more H ions to form anions of a lower charge. These ions are named by adding the word hydrogen or dihydrogen in front of the name of the anion. It is still common to see and use the older naming convention in which the prefix bi- is used to indicate the addition of a single hydrogen ion. HCO3- Hydrogen carbonate or bicarbonateHSO4- Hydrogen sulfate or bisulfateH2PO4- Dihydrogen phosphate Example: The classic example is the chemical name for water, H2O, which is dihydrogen monoxide or dihydrogen oxide. Dihydrogen dioxide, H2O2, is more commonly called hydrogen dioxide or hydrogen peroxide.

Articles of Confederation vs Constitution - 1422 Words

Mallory Pineda AE 1 The Articles of Confederation and United States Constitution are two documents that shaped the U.S. government into what it is today. The Articles of Confederation (AOC) was the first Constitution of the United States. Americans soon realized that this document had to be substantially modified because the U.S. needed a stronger government. The AOC was thought of as an ineffective national government document, although there were some strong points. The AOC was ratified in 1781, and replaced by an improved document known as the United States Constitution in 1789. An unknown person once said, â€Å"Perhaps the greatest service rendered by the Articles of Confederation was the impetus its shortcomings gave to those who†¦show more content†¦This plan also called for the lower house to be elected directly by the people and the upper house to be elected by the lower house. This plan as well called for a Chief Executive and a Federal Court system, and it gave Congress the power to tax and regulate interstate commerce. The Large State Plan gave the national government the power to legislate, and gave a proposed national Council of Revision a veto power over state legislatures. The delegates loved the sound of this fundamental reform plan. The Virginia Plan struck opposition among delegates from the smaller states and thus a competing plan, presented by William Patterson, known as the New Jersey Plan, or Small State Plan, came into action. This plan kept federal powers rather limited and created no new Congress. Instead, the plan enlarged some of the supremacies then held by the Continental Congress. It also called for a plural executive branch and a federal court system like the Virginia Plan. This plan was not as highly sought out as the Virginia Plan, so in turn was rejected which caused the supporters of the Virginia Plan to make amends to the smaller states. This in turn resulted in members of the Senate being elected by the state legislatures. After the Virginia and New Jersey Plan delegates worked out a series of compromises between these competingShow MoreRelatedArticles Of Confederation Vs. The Constitution Essay1448 Words   |  6 PagesJake Roseman AP GOV and Politics February 1 Articles of Confederation Vs. The Constitution There were plenty of differences between the Constitution and the Articles of Confederation. When the American Revolution ended the free states needed some sort of control that would create a unified country. 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A few years after the Articles of Confederation were drafted many politicians and economists, such as Alexander Hamilton, began to see problems with the decentralized form of government that was created

Huckleberry Finn Essay Summary Example For Students

Huckleberry Finn Essay Summary In extreme cases the book, Huckleberry Finn, has been banned from some schools because of the depiction of racial tension towards Jim, the black slave, in Huckleberry Finn. This story takes place at a time where slavery was considered moral. Blacks were considered inferior to whites, but Huckleberry challenges the notion that he was raised upon. Through Huckleberry s adventures Twain expresses his challenge towards civilization s rules and moral code. One must read between the lines and reach for the meaning in Mark Twain s subtle literature dialog. If one were to do this that one would realize that it is not racist, but anti-slavery. For someone to think that Twain considering the era was racist would ludicrous. Considering that Mark Twain is a revolutionary writer and must use detail from an era to make the story unique he shouldn t be considered racist. Their time period is set around the Civil War which was fought for abolishment of slavery. Huck to some people would be the argument for Twain s racism, but Huck was raised from a boy by people with extreme hatred towards blacks such like Pap and Miss Watson. Even if bigotry was part of Huck s attitude towards blacks it should be excused. Towards the end of the novel Huck encounters Aunt Sally who makes a remark towards blacks. She remarked that thank god no one was hurt but it was okay if a black person was. This is just a fine example of the extremities that Huck was raised under and the society s views towards blacks. Twain is merely revealing the harsh truth of society in a subtle tone. It is also important to remember that Mark Twain s description of Jim was not being racist but honest. Back in their era majority of black slaves were non-educated, ignorant, never allowed independence, and were maltreated. Twain was merely using the historical accuracy to his advantage in the novel for a heightened impact. Since Huck is the center piece of the novel people could say that Mark Twain expressed himself through the character. They would use the fact Huck was degrading Jim. As I have said Huck was raised that way from a child, but he evolved to different beliefs. In the beginning after Huck and Jim have run away they find each other. Huck s first step to overcoming prejudice occurs on that island. Huck feels relief that he is no longer alone and needs Jim for comfort. You start to see a bond form which never forms between man and his â€Å"property†. This may not be a gigantic step but it is a step. As the story unfold farther they form a rather special bond of needing each other which shows strong when Jim is auctioned off. He decides to save Jim which is totally unheard of for a white to do for a black. At first he challenges his views of religion whether or not he should write Miss Watson, his owner, and probably still lose Jim for good, or go for Jim himself. Huck decides that he would rather be damned to hell than lose Jim, so he tears up the note a journeys forward. Huck challenged society s views which damns himself to â€Å"kissing boot heels† or humiliation for helping a slave. Huck evolved from â€Å"sivilized† boy to an â€Å"unsivilized† or non-racist boy. The society s values and views are an important factor in this novel. They are brought out to show the horrible society which we once embraced. Huck goes through a complete metamorphosis and stops accepting their values. In a very satirizing and subtle manner Twain tell the reader not to be racist, not to advocate racism, but to challenge society s beliefs which they accepted.

Compare and contrast the methods used by Zeffirelli and Luhrmann in the opening scenes of their films Essay Example For Students

Compare and contrast the methods used by Zeffirelli and Luhrmann in the opening scenes of their films Essay Shakespeares play Romeo and Juliet is one of Shakespeares most interesting and well-known plays. It may even be the most well known play in the world! For this reason, many attempts have been made, by a variety of directors, to interpret and present the Shakespearian tale in their own way, tying to make it creative, original, and unique. The two directors who have succeeded most at doing this are Franco Zeffirelli and Baz Luhrmann, the two films I will be concentrating on. For those who are not aware, Romeo and Juliet tells the tale of two star-crossed lovers, Juliet (13 years old) and Romeo (17 years old) who secretly fall in love and marry. Their families, the Montagues and Capulets, have been fierce enemies for generations. Why, I hear you ask? Well theres no real cause. In the end, their love for one another is doomed. Using this as their basis, the two directors take a very different approach in portraying the play. Franco Zeffirelli went for a more traditional style, whereas Baz Luhrmann attempted to thrill his audience with a comedic modern twist, still keeping the original dialogue. In my opinion, Baz Luhrmanns film is aimed at a younger audience, teenagers for instance, due to the slang, comedy, hip modern feel, and gun violence culture, which seems to be a growing part of our world today. Also, it is set in twentieth century Mexico City, trying to create a modern Miami sort of feel. However, Franco Zeffirellis version, set in the fifteenth century, is aimed at an older audience, adults and the elderly in particular in my opinion. One of the main differences between the two films, apart from the time set, is the opening scenes. The Zeffirelli version has quite a slow opening, and takes a while to get in to the action, in contrast to a fast and furious opening of Luhrmanns film. Obviously one big difference is the time periods of each movie. The older movie was set in Early Renaissance times, whereas the newer movie is set in the early ninetys, but its the opening scenes which display an almost no comparison. Special effects is a key feature in the latest film explosions and gunfights giving an action packed modern twist. In the older version there was no use of special effects, therefore, the movie totally relied on great acting to be convincing. In keeping with the sets and effects, the costumes too are very different. On one hand, Zeffirellis film displays historically accurate clothing, tunics, doublet and hose, and harlequin costumes. These were all typical clothing types in the early Renaissance period. On the other hand, Lurhmanns film uses shirts and jeans, Latino boots, designer suits, beach clothes, and other modern clothing items like jewellery (chains, earrings/studs), to give a very modern feel. Another major difference in the films that is seen often throughout the Lurhmann film is the actors smoking. Obviously in the time of this play, and in Shakespearian times smoking didnt exist. Something as simple as a lit cigarette in ones hand adds a cool and modern feel to the film. There is also a contrast between the choice of weapons and methods of transport. There is almost no comparison between these two factors. Zeffirelli used again historically accurate swords and daggers, bow and arrows, horseback, foot, and horse and carriage. However, the use of guns, explosive effects, sporty kitted cars, helicopters, and speedboats contrasts with this in the modern film. Its simple things like this which can straight away tell the viewer the time period the film is set. Example; space ships and flying cars, obviously in the future, modern cars, bikes, planes, somewhere within the last few decades, horseback, boat, carriage, back in the past. .uc611b6cd58492344a977891d8595668f , .uc611b6cd58492344a977891d8595668f .postImageUrl , .uc611b6cd58492344a977891d8595668f .centered-text-area { min-height: 80px; position: relative; } .uc611b6cd58492344a977891d8595668f , .uc611b6cd58492344a977891d8595668f:hover , .uc611b6cd58492344a977891d8595668f:visited , .uc611b6cd58492344a977891d8595668f:active { border:0!important; } .uc611b6cd58492344a977891d8595668f .clearfix:after { content: ""; display: table; clear: both; } .uc611b6cd58492344a977891d8595668f { display: block; transition: background-color 250ms; webkit-transition: background-color 250ms; width: 100%; opacity: 1; transition: opacity 250ms; webkit-transition: opacity 250ms; background-color: #95A5A6; } .uc611b6cd58492344a977891d8595668f:active , .uc611b6cd58492344a977891d8595668f:hover { opacity: 1; transition: opacity 250ms; webkit-transition: opacity 250ms; background-color: #2C3E50; } .uc611b6cd58492344a977891d8595668f .centered-text-area { width: 100%; position: relative ; } .uc611b6cd58492344a977891d8595668f .ctaText { border-bottom: 0 solid #fff; color: #2980B9; font-size: 16px; font-weight: bold; margin: 0; padding: 0; text-decoration: underline; } .uc611b6cd58492344a977891d8595668f .postTitle { color: #FFFFFF; font-size: 16px; font-weight: 600; margin: 0; padding: 0; width: 100%; } .uc611b6cd58492344a977891d8595668f .ctaButton { background-color: #7F8C8D!important; color: #2980B9; border: none; border-radius: 3px; box-shadow: none; font-size: 14px; font-weight: bold; line-height: 26px; moz-border-radius: 3px; text-align: center; text-decoration: none; text-shadow: none; width: 80px; min-height: 80px; background: url(https://artscolumbia.org/wp-content/plugins/intelly-related-posts/assets/images/simple-arrow.png)no-repeat; position: absolute; right: 0; top: 0; } .uc611b6cd58492344a977891d8595668f:hover .ctaButton { background-color: #34495E!important; } .uc611b6cd58492344a977891d8595668f .centered-text { display: table; height: 80px; padding-left : 18px; top: 0; } .uc611b6cd58492344a977891d8595668f .uc611b6cd58492344a977891d8595668f-content { display: table-cell; margin: 0; padding: 0; padding-right: 108px; position: relative; vertical-align: middle; width: 100%; } .uc611b6cd58492344a977891d8595668f:after { content: ""; display: block; clear: both; } READ: Romeo And Juliet Critical EssayThe techniques of filming are also different. A good example of the different techniques is at the beginning of the two films, the street fights. In the Lurhmann version, at the petrol station there is a lot of use of long and short shots, use of close-up, aerial shots, and low angle shots, which the Zeffirelli version also uses, but also there are other techniques like speeded-up film, freeze-frames, wipes and quick zoom which Zeffirelli does not use. In the street fight in the town market, Zeffirelli uses a highly mobile camera in cinema verite style, and there is a lot of use of aerial shots, and close-ups. There was one thing I noticed in both the films, the use of when introducing Tybalt. Here the camera starts off low, looking at the feet and legs of the person, then slowing raising up the the face as they introduce the character. This is a good technique to use to introduce an important character as the audience will know it must be someone important from the filming technique. Use of sound also differs. In the prologue in Zeffirellis version there is calm orchestral music, relaxing and slow, and also the voiceover of Laurence Olivier in an old fashioned style. Aerial shots slowly panning across the hazy morning of Verona city are used here also. However,in the Luhrmann version, very intense modern opera music is used to build the heat and the voice over is done in a more serious way, in a less calm and old voice as Laurence Olivier. A lot of wipes, quick zooms, close ups, and speeded up film is used here also. Music and sound effects is used throughout both versions. In Lurhmanns, there is spaghetti western style music to go with the gunplay and also the operatic music coming back in after the petrol station goes up in flames (due to the gunfight at the beginning between the montagues and capulets). In the Zeffirelli version there is less music to act as background sound, instead, there is sound effects like a busy market place, the sounding of the bell, a nd screaming and shouting as the fight breaks out. The sound of the bugels when the prince enters instantly lets the viewers know he is an important person, this is a very good sound effect used. Sound effects in Lurhmanns version are very urban, like explosions gunshots, helicopter blades, whereas Zeffirelli has used more the peaceful and natural sounds. The images in the Luhrmann version are modern and media orientated. This is why he begins the prologue with the television set, on the news, to give the viewer the instant impression that the film is set in the modern world, with media being an important factor. Another example of modern imagery is the first time we see Father Laurence when he is conducting experiments with modern scientific equipment, which you wouldnt see in Zeffirellis version! Also he has a huge tattoo on his back, which again is modern as tattoos havent been around for that long. Other interesting modern images you can notice in the Luhrmann version include fireworks at the party, and smoking. A lot of the characters including Romeo are sometimes seen smoking a cigarette. On the other hand, the pictures presented to the audience in the Zeffirelli version are very old, swords instead of guns, horse instead of car etc. Zeffirellis Romeo and Juliet are played by two young unknowns, Leonard Whiting (sixteen years old) and Olivia Hussey (fifteen years old). This was in keeping with the time in which it was made, when there was a generation gap, and they would have been seen as innocent youth taking on the mean minded older people. The actors in the Luhrmann version, however, are well known Leonardo DiCaprio, and not so well known Claire Danes who were 21 and 17 years old when the film was being made. They are different to them in the Zeffirelli version because the acting is more exaggerated, less traditional, and more stylized. .u2d84cb1830799b3fa2462e04f035c66e , .u2d84cb1830799b3fa2462e04f035c66e .postImageUrl , .u2d84cb1830799b3fa2462e04f035c66e .centered-text-area { min-height: 80px; position: relative; } .u2d84cb1830799b3fa2462e04f035c66e , .u2d84cb1830799b3fa2462e04f035c66e:hover , .u2d84cb1830799b3fa2462e04f035c66e:visited , .u2d84cb1830799b3fa2462e04f035c66e:active { border:0!important; } .u2d84cb1830799b3fa2462e04f035c66e .clearfix:after { content: ""; display: table; clear: both; } .u2d84cb1830799b3fa2462e04f035c66e { display: block; transition: background-color 250ms; webkit-transition: background-color 250ms; width: 100%; opacity: 1; transition: opacity 250ms; webkit-transition: opacity 250ms; background-color: #95A5A6; } .u2d84cb1830799b3fa2462e04f035c66e:active , .u2d84cb1830799b3fa2462e04f035c66e:hover { opacity: 1; transition: opacity 250ms; webkit-transition: opacity 250ms; background-color: #2C3E50; } .u2d84cb1830799b3fa2462e04f035c66e .centered-text-area { width: 100%; position: relative ; } .u2d84cb1830799b3fa2462e04f035c66e .ctaText { border-bottom: 0 solid #fff; color: #2980B9; font-size: 16px; font-weight: bold; margin: 0; padding: 0; text-decoration: underline; } .u2d84cb1830799b3fa2462e04f035c66e .postTitle { color: #FFFFFF; font-size: 16px; font-weight: 600; margin: 0; padding: 0; width: 100%; } .u2d84cb1830799b3fa2462e04f035c66e .ctaButton { background-color: #7F8C8D!important; color: #2980B9; border: none; border-radius: 3px; box-shadow: none; font-size: 14px; font-weight: bold; line-height: 26px; moz-border-radius: 3px; text-align: center; text-decoration: none; text-shadow: none; width: 80px; min-height: 80px; background: url(https://artscolumbia.org/wp-content/plugins/intelly-related-posts/assets/images/simple-arrow.png)no-repeat; position: absolute; right: 0; top: 0; } .u2d84cb1830799b3fa2462e04f035c66e:hover .ctaButton { background-color: #34495E!important; } .u2d84cb1830799b3fa2462e04f035c66e .centered-text { display: table; height: 80px; padding-left : 18px; top: 0; } .u2d84cb1830799b3fa2462e04f035c66e .u2d84cb1830799b3fa2462e04f035c66e-content { display: table-cell; margin: 0; padding: 0; padding-right: 108px; position: relative; vertical-align: middle; width: 100%; } .u2d84cb1830799b3fa2462e04f035c66e:after { content: ""; display: block; clear: both; } READ: How does Shakespeare present the role of women in the play "The Winter's Tale" EssayTo sum up, the two films of Romeo and Juliet were both created and directed brilliantly by the two directors, and its hard to believe a some points that the films are both set on the same story! Theres so much thats different about them! Appart from the obvious time set, one being Shakespearian times (Zefirellis) and one being the modern world (Lurhmanns), the language/dialect is different, the transport methods and weapons are different, and also the filming styles and sound effects are different! I think they are both great films and to get a true feeling of the story I would prefer to wa tch the older version, but I do however like Lurhmanns version more due to it being a more exciting, active and modern film.

Role of Religion in Early American Literature Essay Example

Role of Religion in Early American Literature Essay Role of Religion in Early American Literature American Literature, especially of the early settler and colonial period is marked by a deep sense of religion and a stress upon writing about matters related to religion. The development of early American literature thus can be seen to be a reflection of the religious ideals followed by the early settlers and colonists and it became a means of promoting a moral and ethical way of life. Early American literature is filled with an obvious expression of religion and its redeeming power as well as an acknowledgment of its strength to help human beings bear adversity and triumph in difficult situations. The power of religion, as expressed in early American literature deals more with a sense of gratefulness to God for giving courage to the new settlers and this is seen in the works of Mary Rowlandson, who, in writing of her long captivity by the natives expressed continuously her gratefulness to God for giving her courage in those difficult times. The profound role of religion in early American literature is also understood in the context of the religious nature of the earliest settlers in America, the Puritans. The reason the Puritans had made the voyage across the Atlantic and to America was for reasons of practicing their faith and writing provided a means to lay down their expectations from their new life and the hard work needed to sustain life was enhanced by stories of fortitude and courage. The religious component of American literature can also be understood in relation to the strong influence exerted by the Puritans in the early years of settlement. We will write a custom essay sample on Role of Religion in Early American Literature specifically for you for only $16.38 $13.9/page Order now We will write a custom essay sample on Role of Religion in Early American Literature specifically for you FOR ONLY $16.38 $13.9/page Hire Writer We will write a custom essay sample on Role of Religion in Early American Literature specifically for you FOR ONLY $16.38 $13.9/page Hire Writer An inherently religious group, the writings of the Puritans consisted mainly of sermons, hymns and poetry and journals of their lives. These journals, being a record of their daily lives were imbued with religious ideas because of the important role played by religion in the daily lives of the people and the stress upon hard work as one of the ways to serve God. The role of religion in early American literature can also be traced to the importance placed on learning and education among the Puritans. While the Puritans are generally perceived as hard working and God fearing people, they were also a highly educated people and their education found its expression in their writings. Their writings reflected their engrained beliefs, especially religion which was integral to their existence and hence early American literature is infused with religiosity. The role of religion in the literature of this period can also be attributed to the journals kept by the early settlers who recorded their daily life with precision. Religion became central to their journals because Puritanism called for reflection on the spiritual and this was expressed in their writings, which became records of their religious experiences and thus filled with religious ideas. The period when America saw the influx of British settlers in its lands was also the time when the Bible was put in the hands of the common man and greater number of people had access to religious writing. The settlers carried the holy book with them, which was a source of inspiration and sustenance for them in their trying times. The simplicity of the early American literature can be traced to the simple writing style characterized by the Bible and its religious message. The role of religion in early American literature is extremely pervasive and it forms the obvious theme for most written work composed during the period. The highly religious nature of the early settlers and their deep seated belief in God and his mercy is shown in these writings, giving it a distinctly religious tone.

Ancient civilization comparative essay Essay Example

Ancient civilization comparative essay Essay Example Ancient civilization comparative essay Essay Ancient civilization comparative essay Essay Ancient Civilization Comparative Essay Without any form of rapid long distance communication as we have today, Egypt and Mesopotamia built their civilizations with inadvertent similarities and differences between their political and social structures. Given the facts that Egypt was unified and Mesopotamia was a collection of city states, both had common writing forms amongst them, but not all were literate due to the sharply contrasting social hierarchy. Even though Egypt believed in a fulfilling after life, Mesopotamia did not; owever, both had polytheism religions. Known as one civilization but actually a collection of city-states, Mesopotamia, unlike Egypt, was not politically unified. However, Egypt was politically unified under one ruler, the pharaoh. Political unity allowed for a stable government and economy. Therefore, more people were able to study other pursuits. As a result of this, the two civilizations developed respective forms of writing. Usually used to record religious rituals, hieroglyphics were used as a form of writing and art; but it wasnt only used for religion. Hieroglyphics were also used for writing poems, myths, medical recipes and records of battle, legal documents, trade transactions and even magic spells. Scribes, wrote with hieroglyphics on walls of temples but mostly papyrus, an early form paper. Mesopotamian scribes, instead of writing on papyrus wrote on clay tablets. Mesopotamians are credited with inventing the earliest form of writing, Cuneiform. With the use of reed styluses, they carved pictographs into clay tablets and left the tablets to dry. Even though both civilizations had a writing form, not all ould read or write due to the massive inequality between the elites the laymen. Only the elites could read and write because only they could afford to go to school. In each of these civilizations, women were not permitted to attend school. However, women in Egypt had rights to an extent. For example, in the absence of her husband and sons women would manage the family farms or businesses. Women could even initiate a lawsuit to get a divorce. But those rights came with a price, under the law women in Egypt were treated equally even more so cruel than men. To a degree women in Egypt had freedom of expression while women in Mesopotamia could not due to the fact that they were completely downgraded and did not have any rights unlike Egyptian women. Under one leader, Egypt was unified; ancient Egyptians believed that their leaders, or Pharos, were part god, a god of their many gods. In fact, it was believed that Egypt had over 2000 gods, Just short of Mesopotamias 3000. There is no doubt that they were both polytheistic, but their beliefs of the after life differed. The gloomy outlook of Mesopotamian religion was to go to the land of no return after life on earth. On the other hand, Egyptian religion believed that ones after life is where one finds content; as a matter of fact it was believed that kings ruled in the after life as well, therefore they were part god. In order for them to rule in the after life, they had to undergo a proper burial. Therefore in their life on Earth, it was ordered that a proper mesopotamians also built a pyramid like structure, but it was used for religion and ot as a burial site, the ziggurat. Although Egypt was unified under one ruler and Mesopotamia was various city states, their social structures were homogeneous in parts yet also heterogenous in others. However, because of the social hierarchy not all were educated and could write; both had common writing forms among them. Even though both believed in an after life, their outcomes were not the same. The early civilizations of Egypt and Mesopotamia had distinguishable similarities but also very distinct differences.

Human Capital Essay Example | Topics and Well Written Essays - 1250 words

Human Capital - Essay Example This is a case analysis of the Riordan Manufacturing, a global plastics producer employing 550 people with projected annual earnings of $46 million. The company is wholly owned by Riordan Industries, a Fortune 1000 enterprise with revenues in excess of $1 billion. Production is divided among three plants: plastic beverage containers in Albany, Georgia; custom plastic parts in Pontiac, Michigan; and plastic fan parts in Hangzhou, China. Research and Development is conducted at corporate headquarters in San Jose, California. Riordans major customers are automotive parts manufacturers, aircraft manufacturers, the Department of Defense, beverage makers and bottlers, and appliance manufacturers. The cause of the problem that Riordan Manufacturing is facing is rooted from several strategic changes in the way it manufactures and markets its products. The declining sales and uneven profits over the past two years not only forced the company to change its sales processes, but prompted them to adopt a customer-relationship management (CRM) system. So now customers are serviced primarily by sales teams rather than single salespeople, with each team focusing on a particular customer segment. Teams typically include a sales person, product engineering specialist and customer service representatives. The company is hoping that the team approach will improve sales. With some work being redirected to a new manufacturing facility in China, and plants have been restructured into self-directed work teams, the changes implemented have caused the employee retention numbers to decline. An employee survey showed a decrease in overall job satisfaction, particularly in the areas of compensatio n and benefits. Riordan’s employees comprise three major demographic groups. Baby boomers make up the bulk of the managerial and about half of the manufacturing

Strategic Hospitality Management Essay Example | Topics and Well Written Essays - 750 words

Strategic Hospitality Management - Essay Example Planning, leading, directing, supervising and regulating of activities related to the strategy are essential parts of strategic management process. Planning is the most important phenomenon in strategic management that maintains the foremost significance in respect of presenting the outline of the strategy. Hence, selection of corporate scheme, establishment of goals and objectives, identification of strategic options, planning and allocation of resources, organizational structure and design, managing structure change, and in-depth analyses of corporate environment are included in strategic management process. Both external and internal analyses play imperative part in strategic management process. Internal influences include strengths and weakness of a firm, while external influences include opportunities a corporate firm enjoys as well as the threats and challenges it undergoes from its competitors during the exercise of its strategic scheme. Every organization, whether large or small, or local or international, devises strategy keeping in view the strengths, weaknesses, opportunities and threats. For instance, the unabated popularity, wide range of consumers, universality and unique brand serve as the strength of the Coca-Cola Company (TCCC). Similarly, Red Hat’s work force, innovative ideas and extraordinary technical skills include among its strengths. On the other hand, health damages, high price and banishment of tobacco consumption include the weaknesses of international brand Marlboro. In the same way, fulfillment of the demands of wide range of consumer in all parts of th e world along with unique products, swift changes according to the latest challenges and production of new technological equipments are the opportunities before world famous brand Microsoft Corporation. In addition, ban of the products of Danish commodities in Muslim countries are the threats faced by the north European countries while entering the global markets. It is therefore

CHANEL IN CHINA Research Paper Example | Topics and Well Written Essays - 3750 words

CHANEL IN CHINA - Research Paper Example As economy in China is rapidly growing, the Chinese who can afford luxury also increases. The country is considered as the third largest luxury market in the world, after the United States and Japan. This is the prime reason multinational companies of luxury goods extend presence of their products in the country. China is one of the most economically developed countries in the world. It has gained its momentum since the Chinese embraced economic transformation in the late 1970s. China has opened its market to foreign investors which attracted many multinational corporations (MNCs) to come and do business. The MNCs then become the engine of the country in its rapid economic growth that helped increase its participation in the international market. Due to global competition, many MNCs established themselves in the Chinese market mainly to seek for cost-reduction and new market. China became a favorite destination of foreign investors or MNCs because of fast investment return. The rapid economic growth opens more market opportunities but still provides cheaper but high quality resources and huge supply of inexpensive labor. This entices the idea of foreign investors to enter in the emerging market. ... One of the luxury companies that established a branch in China is the Chanel. Chanel with Mandarin name Xiang Nai Er, which means little more than fragrant is an international luxury goods company with over 200 boutiques worldwide. It is founded in 1909 by Gabrielle â€Å"Coco† Chanel, a famous haute couture which revolutionized women’s fashion and introduced timeless elegance and fashion. The mother branch is in Neuilly sur Seine, France. The company is one of the world’s preeminent fashions of the present genre. It offers a broad range of luxury products such as ready-to-wear clothes, make-up, fragrances, skincare, leather goods, fine jewelry and accessories. This paper will try to identify Chanel’s development of global strategic alliances, inter-company collaboration, and positioning for greater global competitiveness. Though MNCs such as Chanel have several strengths which include strong brand image, high quality products, and excellent management, th ey still need strategies to be able to compete in the market due to increasing number of luxury brands competing. Discussion Various business strategies are employed by companies especially MNCs in order to maintain presence, establish presence in new markets, and compete in their market segment against same products. In the case of luxury brand Chanel, its advantage may be its global presence for more than a century now, but this does not mean challenges are few. First off, Chanel like any other MNC that is new to China, needed strategic global alliance that will harmonize the market entry as well as reduce all possible risks that a foreign investor will go through. 1. Development of global strategic alliances Knoke (2009)

Analysis Of Small Enterprise: Jones Electrical Distribution

Analysis Of Small Enterprise: Jones Electrical Distribution Mr. Jones is having business in a large, fragmented and highly competitive environment. Profitability of his business depends heavily on sales volumes and costs. The sales are growing at around 18% per annum. However, the profit margin is not maintained at a constant level in terms of sales growth. Exhibit I shows that even though the sales growth was achieved in FY 2005-2006, the firm could not have higher operating profits. The sales revenue was nullified by huge rise in operating expenses. A close look at the profit and loss account reveals that the operating expenses are mainly consists of salaries and wages. It seems that in order to keep the fixed costs in control, the compensation of sales executives is quite high because of link to sales volumes. The sales growth has helped the employees to earn more than to the organization. Secondly, Mr. Jones is working with more than 100 suppliers. For such a small volume of business, 100 suppliers are in excess. This huge number of suppliers may create problems in tracking on accounts payable. The company is also having average days payable at 22.8 days in FY 2006, as compared to 9.8 days in FY 2005. During the last two years, Mr. Jones has not been able to take advantage of trade discounts. Mr. Jones is also making payments of $ 2000 per month to Mr. Verden, along with interest payment of 8% per annum. The face amount ($250000) can be considered as a long term loan for Mr. Jones. However, it is not evident from the P L account, that the interest paid on the loan taken from Mr. Verden is accounted for income statement. Mr. Jones is also building up fixed assets over a period of time; however, these assets were financed through his short term financing. It can be assumed that the short term finance was available readily for the operations, has been diverted to create long term assets and liquidating long term debts. These facts and assumptions imply the Mr. Jones is having a relatively aggressive approach in working capital financing of the firm. Main issue for Mr. Jones is to find a financing option for the firm. As the market is very dynamic and there is economy downturn, he is not able to forecast demand for his products for more than one year. Although, the following year looks quite promising and a good sale is forecasted, Mr. Jones is facing issue of liquidity. Mr. Jones is of opinion that the liquidity problem is causing the irregular cash flows and hence he need to borrow more money for daily operations. However the forecasted cash flow (Exhibit III) can show that there is no severe cash flow problem. A focused approach to accounts payable and accounts receivables will help Mr. Jones to overcome the liquidity problems. Around the main issue of arranging finance for the business, Mr. Jones has the additional issues of growing sales, reducing tension between the firm and suppliers, moderating salary for the sales staff and creating a strong relationship with the bankers. Looking at the financial statements (Exhibit I, II, III) we can say that the financial condition of Jones Electrical Distribution are satisfactory. The company is having steady growth in sales. The operating margins are also kept at optimal levels. However the company is facing problems managing their cash operations. A feel of cash crunch is guiding the firm to store more inventories, and as a result of that, the inventory levels have increased. The firm is also investing in fixed assets on regular basis. The firm is able to maintain the cost of goods sold to an optimal level since last few years. This has been the result of maintaining cordial relations with the suppliers. The firm is maintaining healthy liquidity ratios and growth ratios. However, the increase in days payable and inventory turnover is a bit of concern. Even if the cash conversion cycle is reducing, we can observe that days payable has exceeded the limit of 30 days. It means that if the relationship between the firm and supplier is not maintained, the firm can face the interest expenses for not managing their current assets. The firm is working on very thin operating margin. The increase in TIE (Times interest earned) over the years measurers that the operation income is declining and soon the firm will not be able to meet their annual interest costs. suggest of increasing sales volume on immediate basis to maintain profitability. The firm is also able to maintain retention rate of 100% after providing for the proprietorà ¢Ãƒ ¢Ã¢â‚¬Å¡Ã‚ ¬Ãƒ ¢Ã¢â‚¬Å¾Ã‚ ¢s salary. This made sure that the firm will take minimal finances from outside sources. The major problem for Jones Electric Distribution Company is to manage cash for the new financial year 2007. And this problem looks like a temporary problem. The firm is having stored huge inventories in expectation of sales growth for the New Year. The forecasted analysis shows that a onetime credit enhancement from bank will help the firm to manage their finances better. A higher credit will help the firm procure inventory and use them in business. With improved collections and cash at hand, the firm can now manage for trade discounts and save money. Secondly, the firm will be able to retain a huge sum of $201,000 at the end of FY 2007. These funds can be used to retire their personal loan with Mr. Varden. Retirement of this loan will help the firm to improve on its profitability and the bank finance will be easier. It is also observed that additional finance from bank is helping the firm to avail trade discounts. The nominal cost of not taking the discount when credit terms are 2/10, net 30 is 37.24 % [( 2/98)*(365/30-10)], which is much higher than the 8% interest charged by the bank. Hence, it is advisable for Mr. Jones to go for a bank finance and use the money for availing trade discounts. Even if Mr. Jones adopt a slow growth strategy (to grow at the rate of 8-10%), and can manage with the existing facility of USD 250000/-, he can avail trade discounts and increase his earnings. However, one time use of bank finance will make sure that in coming years, Mr. Jones can be debt free and his firmà ¢Ãƒ ¢Ã¢â‚¬Å¡Ã‚ ¬Ãƒ ¢Ã¢â‚¬Å¾Ã‚ ¢s financial performance will improve. Looking at the market growth and the risk appetite for Mr. Jones, we can advice him for taking an aggressive route and avail higher finances from Southern Bank and Trust. The financial projections are given below for various options. Following are the options available to Mr. Jones. Take Trade Discount and avail USD 350000/- Take Trade Discount and avail USD 250000/- Forgo Trade Discount and avail USD 350000/- Forgo Trade Discount and No Additional Financing We already seen that forgoing trade discount is a costly affair for the firm and hence cannot be used. So first two options are available for making a profitable decision. As Mr. Jones is forecasting the market as growing, he can use this opportunity to avail bank finance at USD 350000/-. This facility can be availed in two parts, Long Term and Short Term. Long term funds of USD 100000/- can be used with the cash received from business to retire the personal loan. Remaining USD 250000/- can be used for normal business transactions and avail trade discounts. These operations will make sure that Mr. Jones is having stable business operations in under one year. While going for financial restructuring, Mr. Jones can also look forward to change the salary structure of Sales Personnel. FRICTO Analysis. Flexibility : An additional finance of US $ 100000/- will help Mr. Jones to manage his future cash flows. Mr. Jones is already maintaining a healthy RR of 100%. This helps the firm to keep the Debt/Equity ratio in control. The continuous operations will make sure that Mr. Jones can avail more finance as and when required. Risk : Mr. Jones required reducing his number of suppliers and focusing on few major ones. With reduction of suppliers, it will be easier for him to manage accounts payable and he can demand better credit terms. Income : Cost reduction will be the focus area for Mr. Jones, in an attempt to increase profits for the firm. As the firm is working on very thin margins, any excess spending will hamper the profitability of the firm. Mr. Jones needs to give closer look on operating expenses, which are increasing ahead of sales growth. Control : Mr. Jones can decide on which option to choose for the betterment of the firm in long term. Timing : As the business is in growing stage, Mr. Jones is able to take risks, depending on his relations with supplier and buyers. It is also beneficial to avail additional finance when business is growing. Others : The risk appetite of Mr. Jones, his relation with the suppliers and an in depth knowledge of the industry is the key success factor for the firm. The success of the firm depends heavily on Mr. Jonesà ¢Ãƒ ¢Ã¢â‚¬Å¡Ã‚ ¬Ãƒ ¢Ã¢â‚¬Å¾Ã‚ ¢ insights. Exhibit I Exhibit II Exhibit III Exhibit IV

Essay --

The Girl in the Tangerine Scarf The Girl in the Tangerine Scarf is written by Mohja Kahf and is a coming of age story as the main character, Khadra tries to find her true identity. Khadra Shamy is the daughter of Syrian immigrants who moved to Indianapolis. Khadra grew up in a strict Muslim community and both of her parents were very involved with the Da’wah Center. In the strict Muslim community that Khadra was raised in, all children were brought up believing in one definition of Islam and rejecting all other definitions and practices. Throughout the book we learn how Khadra’s parents lied to her about some of the Islamic teachings she thought to be true during her childhood, which interferes with her search for her identity. There are several examples of social pressures and realities throughout the book that help shape Khadra’s identity, many of which girls of any religion or culture would struggle with in their own way, making this novel relatable across different cultures. The first life-changing event that Khadra encounters is the rape and death of her close friend Zuhura. Zuhura represented a hybridization, in the sense that she was a strong muslim woman, but also wasn’t afraid to interact with Americans, unlike most of the community. Zuhura was like a sister to Khadra as well as a mentor. Upon the rape and death of Zuhura, Khadra tightened her grip on her religion. She saw Zuhura’s death as what could happen if you try to interact with Americans and don’t abide by the community’s strict Islamic teachings. Khadra gets married to Jumu’ah al-Tashkenti upon returning from her trip to Saudia Arabia for the Hajj. Khadra marries him because she thinks he is an ideal, strong Muslim man, and that is what she thinks that she ... ... of a different religious background. She depicts Khadra’s journey not as her breaking free from the strict rules of the Muslim community she was raised in, but rather focused on situational experiences that Khadra had to overcome to find her religious identity. It is in a sense a coming of age story in which the Khadra experiences things that are realistic and relatable because they can happen on a daily basis to anyone. The novel depicts that how you react to the social pressures defines you as well, which is a concept that is often lost, yet Mohja Kahf depicts this clearly. The Girl in the Tangerine Scarf shows how social pressures and obstacles shape your identity and without them, you could be stuck just adopting the same identity as your parents. Ashley Fleetwood Word Count: 1,040 Kahf, Mohja. â€Å"The Girl in the Tangerine Scarf†. Public Affairs. New York. 2006.

Agiesm

Myths can be considered a common way for society as a whole to develop stereotypical Judgments upon the elderly community. Myths create negative attitudes that often create discrimination within society that enhances untruths about the elderly population. In order to see the myths that hinder society as a hole taking a look at what ageism Is is in fact beneficial to bring truth to the table. What Is ageism? Ageism Is a social attitude that has created myths wealth society that have endorsed society's stereotype of aging adults within communities.Myths are can be generated by many things such as demeaning comments passed on from person to person or by simply turning on the television and seeing negative adaptations of what life Is like as an elderly person. â€Å"Many social psychologists and gerontologists cite the media as a major source of negative stereotypes of the elderly' (Martin, 2007) (up. 141). Fear of growing old can generate the social attitudes seen in ageism that brings about negative behaviors to cloud people's Judgments and ultimately result In myths. Language is one of the most pervasive ways that ageism exists and persists In our society' (Wilkinson, Ferreira, & Nelson, 2004, up. 341-342). Terms used in daily conversations such as; old people, grumpy old men, they can't do it they are to old are all types of languages that support ageism in society today. Interventions and strategies with ageism are to educate the public on the rigorousness of discrimination and taunting language directed towards our aging adults.In today's societies many options are available for the elderly to seek refuge in these times of need. According to Martin (2007), † contrary to the common belief of many in the United States, most elderly individuals remain in their homes until death and are cared for by family members† (up. 142). In some situations a family member may move their aging relative or loved one into their homes to make it easier for them to m aintain constant care needed on a twenty- four hour basis. Retirement communities offer numerous accommodations that assist ND care for aging adults in a setting that creates an active lifestyle.Some communities offer clubs, crafts, physical health classes, cooking facilities, pools, beautiful landscapes to walk in and anything else that will empower yet keep a well balanced lifestyle. â€Å"Government subsidized senior housing can make housing costs more affordable for the elderly population, whether in the form of a subsidy provided directly to the elderly in form of tax credits, loans, or rental vouchers, or subsidies provided to the housing community, which passes on this discount to the enter† (Martin, 2007) (up. 143).Finally there is assisted living facilities (ODL) designed to accommodate individuals who need around the clock care and assistance. This option of residency is an apartment typesetting that is based around structured living. In an (ODL) environment there w ill be all types of assistance to various needs from the residence in the forms of eating, bathing, walking, exercising, getting dressed and even help with taking medications on time. Most (ODL) communities will have Can's (Certified Nursing Assistants) as well as on tie Urn's (Registered Nurses) that provide most of the assistance needed for care.

Why You Should Consider Uploading Your Books to IngramSpark

Why You Should Consider Uploading Your Books to IngramSpark How can you add another stream of passive book-sale income? Upload your books to  IngramSpark. Ingram has been a global book distributor for decades, and partnered with Lightning Source in 2009 to become a print-on-demand publisher. The beauty of print-on-demand is that you don’t have to pay for a print run- books aren’t printed until they’re actually ordered.   As a long-time global distributor, Ingram makes books available for distribution to every outlet in the world, including libraries, indie bookstores, and university bookstores. Some authors have complained that even local bookstores who love local authors won’t carry books printed Other authors complain about CreateSpace’s bad customer service, hidden costs, and the quality of the books. I’m not saying CreateSpace isn’t a great option, because I personally know several authors who are very happy with their experience of publishing with CreateSpace. But why not take advantage of every market? I especially appreciate having my books available on  Indiebound.org  for readers who carry torches for indie bookstores. And the real plus for IngramSpark is that you can send a copy of your book for consideration to Barnes Noble’s Small Press Department (barnesandnobleinc.com/publishers-authors/sell-your-book-at-barnes-noble/). So far, I’ve had three of my books accepted, and when I sent two together, BN ordered 36 copies of each. Plus, if you promote your books with BN links, there’s nobody there selling used copies of your books to take new sales away. If you use IngramSpark, you can bop around to bookstores and let them know your book is available in Ingram’s database (or, if you’re an introvert, just call and ask if they have it - maybe they’ll order a couple!). Before you quit your day job, there is a caveat: if you want to sell many books, you have to choose the 55 percent discount to booksellers, and make the books returnable. After Ingram takes their cut, I only make a bit over $4 per book. You can choose a 40 percent discount, but probably won’t sell as many books. Here’s a tip: IngramSpark usually has two periods during the year when they offer a free promo (spring and fall), so you don’t have to pay their standard $49 (print) or $25 (ebook) setup fee.   If you’re in a hurry, that’s not even a high price.   You’ll need to buy an ISBN (https://www.myidentifiers.com/). I have a lot of books, so I made one quantity purchase when I began, which was my primary expense ($295 for 10 ISBNs). Buying your own ISBN lets you provide comprehensive details about your book (including searchable tags) for Bowker’s Books in Print database, which is used Unlike Amazon, IngramSpark provides no setup support- you’ll need to complete the entire pre-production process yourself or hire someone to do the editing and the interior and cover designs, so you have everything (interior and full-size cover) ready to upload.   Interior design is not that hard, and IngramSpark offers very clear info about their specs to make the learning curve easier.   It does take some time to master the process.   After you upload, you’ll receive specific info about any changes that are needed. There’s also a Cover Creator tool, which will send you a template to work with based on the size of your book. Two more reasons: the quality of the books is generally very good, and customer service is excellent. You can even get chat support during office hours in the midst of a frustrating issue. Some authors use both CreateSpace (to get Amazon’s attention) and IngramSpark. Might as well cover all the bases Happy Publishing!

The eNotes Blog Scholarship Spotlight January2016

Scholarship Spotlight January2016 Every month, we select some of the best scholarships around and post them here on our blog. When you are ready to apply, check out our tips on How to Write a Scholarship Essay. Visit   Essay Lab if you’re looking for a writing expert  to review and provide feedback your scholarship or college application essays! EditRevise $10,000 Scholarship Essay Contest Amount: Up to $10,000 Eligibility:  You must be applying for an undergraduate degree for enrollment at an accredited institution within the United States or Canada in 2016 (or 2017 if taking a gap year).  Your application must be received by 11:59PM ET on January 15th, 2016 to be eligible.  Recommendations can be from anyone. They will read the 500 essays with the most recommendations. Requirements:  Submit ANY essay you used for a college application. Due Date: January 15, 2016 at 11:59PM ET Learn more and apply Northwest Perspectives Essay Contest Amount: $750 stipend Eligibility:  Oregon Quarterly Northwest Perspectives Essay Contest welcomes nonfiction, personal essays of up to 1,500 words on any topic related to the Pacific Northwest. The contest is open to all nonfiction writers, except: (1) first-place winners from previous years’ contests; (2) authors who have written a feature forOregon Quarterly in the past calendar year; and (3) staff of Oregon Quarterly, the UO’s University Communications division, and their family members. Requirements: They strongly prefer that essays be submitted via our online form.  Hardcopy entries can be mailed to: Oregon Quarterly, 5228 University of Oregon, Eugene, Oregon   97403-5228.  Authors name and contact information (email address, phone number, and mailing address) should be listed on the first page, but not on other pages of the document. Judges are not given the authors’ names when reading the essays.  One entry per person.  Maximum length is 1,500  words.  Entries will not be returned. Those that do not meet these submission guidelines are automatically disqualified. Due Date: January 20, 2016  (online submission and postmark date). Learn more and apply Microsoft Scholarship Program Amount:  Up to full tuition. Recipient will be required to apply for a summer internship and if offered, must complete the internship at Microsoft Corporation in Redmond, Washington. Eligibility:  Applicant must be enrolled full time in a Bachelor’s degree program at a four-year college or university in the United States, Canada, or Mexico. Applicant must be working towards an undergraduate degree in computer science, computer engineering, or a related technical discipline such as electrical engineering, math, or physics. Requirements: Submit your application  here! Due Date: January 31, 2016 Learn more and apply Technology Addiction Awareness Scholarship Amount: $1,000 Eligibility:  You must be a high school freshman, sophomore, junior, or senior or a current or entering college or graduate school student of any level. Home schooled students are also eligible. There is no age limit. You must also be a U.S. citizen or legal resident. Requirements:  Complete the application form below including a 140-character message about technology addiction. The top 10 applications will be selected as finalists. The finalists will be asked to write a full length 500- to 1,000-word essay about technology addiction. Due Date: January 30, 2016 Learn more and apply

The Laws of Leadership Essay Example | Topics and Well Written Essays - 250 words

The Laws of Leadership - Essay Example In the past, whenever I have been handed over a task I have been able to break up the task at hand and come up with a course of action. I have set goals that need to be achieved in order to successfully complete the task. Influencing others is the important aspect of being a leader. If you cannot influence, then you are not a leader. It was only when you can influence, people will follow you. I believe this my weakness as I have not been able to influence people the way I would have wanted to. That is, even though I can connect with any person I am not able to influence them to follow me wholeheartedly. In order to increase my ability to influence, I must start leading by example. I have to first set an example by doing what I propose my followers to do. I need to act responsibly and have to brush up my communication skills. Merely communicating won’t help and I have to identify what drives the other person and then act on it. I have to work on understanding my

Your own travel story Essay Example | Topics and Well Written Essays - 1500 words

Your own travel story - Essay Example The people of this island are very well behaved, honest and hardworking. They are very much sincere towards their job and they do everything with all the heart. We started our journey in the morning from The Harbor Front by a ferry and reached The Batam Center exactly after 45 minutes of amazingly breathtaking ferry ride at the Batam Central. The total journey cost around 45$ per person. The beautiful beaches of batam along with the always smiling people of the island were there to welcome us the port. According to the visa policy of the island, citizens of Singapore, Thailand and Malaysia can gain visa free access to the country while citizens of other countries have to pay a visa fee of 10$ to get entry into the island and a 7 days visa upon arrival is stamped. When we reached the island first of all we hired a taxi for two days and it was decided that the driver will be our host for the next two days and it will be his duty to take us to all the famous places in the island and in return we will give him 150$. The next thing we had to do was to look for a place to stay overnight. As per the suggestion of our friendly host the place called Batamholiday apartments was probably the cheapest ones available there and they were self catering apartments. So we headed off to the apartments and rented an apartment for one night. After getting fresh it was time now to explore the island and the cultures is it and again following the suggestion of our host, we decided to visit the Galang Refugee Camp in the south end of the island. This is a Vietnamese refugee camp but closed down in the 1995. Although it is closed now and it has been years since it is but this place has been kept well preserved and it still feels like it was just yesterday when people used to live there and the place is still full of live. After getting a dose of history we decided to see some pieces of art present in the city and the driver told us there is a mosque in the

Current methods for Cancer Stem Cell characterisation and isolation Essay

Current methods for Cancer Stem Cell characterisation and isolation - Essay Example Apart from achieving a 40-98% enrichment, this technique also produced spheres with enhanced tumorigenicity in immune-compromised mice [Ponti et.al. 2005]. Such a methodology has also been adopted for the enrichment of CSCs from brain [Singh et. al. 2003], bone sarcomas [Gibbs et.al. 2005], pancreas [Gou et. al. 2007], melanomas [Fang et. al. 2005] and colon [Ricci-Vitiani et. al. 2007]. The spheres produced in all these instances had a high level of surface markers that belong to the respective tumor initiators, namely CSCs. The exploitation of the sphere forming properties of CSCs for their enrichment in culture is considerably more preferable than using surface markers or SPs. In spite of its utility, the process of isolation of CSCs based on sphere formation has significant limitations, the biggest one of which is that they are a heterogeneous population, wherein, only a few cells undergo self-renewal [Ponti et. al. 2005]. Furthermore, upon immunofluorescence analysis of spheres obtained in prostrate cell lines, it has been found that these are heterogenous for CSC surface markers [Patrawala et. al. 2006]. Moreover, variation in sphere size, culture medium and the differences in employed techniques for enrichment also limit the success of the process, as shown in neurosphere cultures [Jensen & Parmar 2006]. The ALDH enzyme plays an important role in the conversion of aldehydes into weak acids. This reaction is vital for the generation of biologically active substances. The ALDEFLUOR assay is based on an enzymatic reaction that measures aldhehyde dehydrogenase 1 (ALDH 1) activity. The detoxifying enzyme, ALDH 1, is responsible for the formation retinoic acid, a biologically active substance, from the oxidation of retinol. The enzyme ALDH1 is abundant in primitive hematopoietic cells and is expressed in the early

Air Pollution Essay Example for Free

Air Pollution Essay BEIJING — Outdoor air pollution contributed to 1.2 million premature deaths in China in 2010, nearly 40 percent of the global total, according to a new summary of data from a scientific study on leading causes of death worldwide. Figured another way, the researchers said, China’s toll from pollution was the loss of 25 million healthy years of life from the population. The data on which the analysis is based was first presented in the ambitious 2010 Global Burden of Disease Study, which was published in December in The Lancet, a British medical journal. The authors decided to break out numbers for specific countries and present the findings at international conferences. The China statistics were offered at a forum in Beijing on Sunday. â€Å"We have been rolling out the India- and China-specific numbers, as they speak more directly to national leaders than regional numbers,† said Robert O’Keefe, the vice president of the Health Effects Institute, a research organization that is helping to present the study. The organization is partly financed by the United States Environmental Protection Agency and the global motor vehicle industry. What the researchers called â€Å"ambient particulate matter pollution† was the fourth-leading risk factor for deaths in China in 2010, behind dietary risks, high blood pressure and smoking. Air pollution ranked seventh on the worldwide list of risk factors, contributing to 3.2 million deaths in 2010. By comparison with China, India, which also has densely populated cities grappling with similar levels of pollution, had 620,000 premature deaths in 2010 because of outdoor air pollution, the study found. That was deemed to be the sixth most common killer in South Asia. The study was led by an institute at the University of Washington and several partner universities and institutions, including the World Health Organization. Calculations of premature deaths because of outdoor air pollution are politically threatening in the eyes of some Chinese officials . According to news reports, Chinese officials cut out sections of a 2007 report called â€Å"Cost of Pollution in China† that discussed premature deaths. The report’s authors had concluded that 350,000 to 400,000 people die prematurely in China each  year because of outdoor air pollution. The study was done by the World Bank in cooperation with the Chinese State Environmental Protection Administration, the precursor to the Ministry of Environmental Protection. There have been other estimates of premature deaths because of air pollution. In 2011, the World Health Organization estimated that there were 1.3 million premature deaths in cities worldwide because of outdoor air pollution. Last month, the Organization for Economic Cooperation and Development, based in Paris, warned that â€Å"urban air pollution is set to become the top environmental cause of mortality worldwide by 2050, ahead of dirty water and lack of sanitation.† It estimated that up to 3.6 million people could end up dying prematurely from air pollution each year, mostly in China and India. There has been growing outrage in Chinese cities over what many say are untenable levels of air pollution. Cities across the north hit record levels in January, and official Chinese newspapers ran front-page articles on the surge — what some foreigners call the â€Å"airpocalypse† — despite earlier limits on such discussion by propaganda officials. In February, the State Council, China’s cabinet, announced a timeline for introducing new fuel standards, but state-owned oil and power companies are known to block or ignore environmental policies to save on costs. A study released on Thursday said the growth rate of disclosure of pollution information in 113 Chinese cities had slowed. The groups doing the study, the Institute of Public and Environmental Affairs, based in Beijing, and the Natural Resources Defense Council, based in Washington, said that â€Å"faced with the current situation of severe air, water and soil pollution, we must make changes to pollution source information disclosure so that information is no longer patchy, out of date and difficult to o btain.† Chinese officials have made some progress in disclosing crucial air pollution statistics. Official news reports have said 74 cities are now required to release data on levels of particulate matter 2.5 micrometers in diameter or smaller, which penetrate the body’s tissues most deeply. For years, Chinese officials had been collecting the data but refusing to release it, until they came under pressure from Chinese who saw that the United States Embassy in Beijing was measuring the levels hourly and posting the data in a Twitter feed, @BeijingAir. Last week, an official Chinese news report said the cost of environmental degradation in China was about $230 billion in 2010, or 3.5  percent of the gross domestic product. The estimate, said to be partial, came from a research institute under the Ministry of Environmental Protection, and was three times the amount in 2004, in local currency terms. It was unclear to what extent those numbers took into account the costs of health care and premature deaths because of pollution. National Park Service Air Pollution Its Nature, Sources, and Effects http://www.nps.gov/shen/naturescience/airpollution.htm Last Updated: 04/09/2014 Summer View, mountains in the distance from Skyline Drive. John F. Mitchell NPS Volunteer Introduction Air pollution occurs in many forms but can generally be thought of as gaseous and particulate contaminants that are present in the earths atmosphere. Gaseous pollutants include sulfur dioxide (SO2), nitrogen oxides (NOx), ozone (O3), carbon monoxide (CO), volatile organic compounds (VOC), hydrogen sulfide (H2S), hydrogen fluoride (HF), and various gaseous forms of metals. These pollutants are emitted from large stationary sources such as fossil fuel fired power plants, smelters, industrial boilers, petroleum refineries, and manufacturing facilities as well as from area and mobile sources. They are corrosive to various materials which causes damage to cultural resources, can cause injury to ecosystems and organisms, aggravate respiratory diseases, and reduce visibility. Particulates come in both large and small or fine solid forms. Large particulates include substances such as dust, asbestos fibers, and lead. Fine particulates include sulfates (SO4) and nitrates (NO3). Important sourc es of particulates are power plants, smelters, mining operations, and automobiles. Asbestos and lead affect organisms, while sulfates and nitrates not only cause health problems, but also contribute to acid rain or acid deposition and a reduction in visibility. Particulate matter, a term sometimes used instead of particulates, refers to the mixture of solid particles and liquid droplets found in the air. Toxic air pollutants are a class of chemicals which may  potentially cause health problems in a significant way. The sources of toxic air pollutants include power plants, industries, pesticide application, and contaminated windblown dust. Persistent toxic pollutants, such as mercury, are of particular concern because of their global mobility and ability to accumulate in the food chain. More research is needed to fully understand the fate and effects of mercury and the many other toxic pollutants. Primary pollutants are those that are emitted directly into the air from pollution sources. Secondary pollutants are formed when primary pollutants undergo chemical changes in the atmosphere. Ozone is an example of a secondary pollutant. It is formed when nitrogen oxides (NOx) and volatile organic compounds (VOCs) are mixed and warmed by sunlight. Ozone (O3) is a major component of what is often referred to as smog. The ozone which is present in the troposphere, or the atmosphere that is close to the ground, should not be confused with beneficial ozone that is located in the stratosphere or upper atmosphere. This beneficial ozone in the stratosphere helps protect the earth from harmful ultraviolet light from the sun. Sources of Air Pollution Stationary and Area Sources A stationary source of air pollution refers to an emission source that does not move, also known as a point source. Stationary sources include factories, power plants, dry cleaners and degreasing operations. The term area source is used to describe many small sources of air pollution located together whose individual emissions may be below thresholds of concern, but whose collective emissions can be significant. Residential wood burners are a good example of a small source, but when combined with many other small sources, they can contribute to local and regional air pollution levels. Area sources can also be thought of as non-point sources, such as construction of housing developments, dry lake beds, and landfills. Mobile Sources A mobile source of air pollution refers to a source that is capable of moving under its own power. In general, mobile sources imply on-road transportation, which includes vehicles such as cars, sport utility vehicles, and buses. In addition, there is also a non-road or off-road  category that includes gas-powered lawn tools and mowers, farm and construction equipment, recreational vehicles, boats, planes, and trains. Agricultural Sources Agricultural operations, those that raise animals and grow crops, can generate emissions of gases and particulate matter. For example, animals confined to a barn or restricted area (rather than field grazing), produce large amounts of manure. Manure emits various gases, particularly ammonia into the air. This ammonia can be emitted from the animal houses, manure storage areas, or from the land after the manure is applied. In crop production, the misapplication of fertilizers, herbicides, and pesticides can potentially result in aerial drift of these materials and harm may be caused. Natural Sources Although industrialization and the use of motor vehicles are overwhelmingly the most significant contributors to air pollution, there are important natural sources of pollution as well. Wildland fires, dust storms, and volcanic activity also contribute gases and particulates to our atmosphere. Unlike the above mentioned sources of air pollution, natural air pollution is not caused by people or their activities. An erupting volcano emits particulate matter and gases; forest and prairie fires can emit large quantities of pollutants; plants and trees naturally emit VOCs which are oxidized and form aerosols that can cause a natural blue haze; and dust storms can create large amounts of particulate matter. Wild animals in their natural habitat are also considered natural sources of pollution. The National Park Service recognizes that each of these sources emits gases and particulate matter into the atmosphere but we regard these as constituents resulting from natural processes. Air Pollution at Shenandoah Sources of air pollution that affect Shenandoah National Park are largely outside of the park. These include industrial facilities located throughout the mid-Atlantic region and the Ohio River Valley as well as urban centers in this same region. Because most areas adjacent to the park are rural and agricultural, it is clear that transport of pollutants from distant  locations is an important element upon which park air quality hinges. Even some agricultural activities, such as ammonia from the poultry industry and pesticides that are applied to adjacent fields, may contribute to air pollution in the park. In-park emission sources are relatively small, but do include motor vehicles, maintenance equipment, small boilers and generators. The relative contribution from the in-park sources is very small compared to other sources. In a July 2002 report describing an emissions inventory for Shenandoah National Park, it was determined that less than 1% of emissions were produced from in-par k sources. How does air pollution move? Air transport is the term used to describe the mechanism by which air pollution moves from an emissions source to a receptor. A source is a location (i.e., smokestack, chimney, exhaust pipe) from which the pollutant emanates and a receptor is the place (i.e., soil, vegetation, waterbodies, human lungs) where the pollutant is deposited. The atmosphere itself is the transporter of pollutants from sources to receptors. If the wind carries the plume of pollution high enough in the air, it may travel for hundreds of miles before being brought to earth. This is known as long-range or long-distance transport. Air Pollution Effects The air is an important component of the natural system of a park in its own right. The presence of pollution in the atmosphere results directly in air quality degradation. Air pollution is also a critical factor affecting the quality of other environmental resources as well as the human-made structures and facilities in the area. Polluted air can and has harmed park resources in a variety of ways depending upon the chemistry of the pollutant, weather and environmental conditions, and the nature or sensitivity of park resources. Examples of this harm include vegetative discoloration and growth disruption from ozone, loss of aquatic species from stream acidification, shifts in nutrient availability from acid deposition, and erosion of building surfaces and rock formations. Air pollution impairs visibility and contributes to climate change. Air pollution can also be detrimental to human health. Shchooltoday Your Cool Facts and Tips on Air Pollution What causes air pollution? Air pollution can result from both human and natural actions. Natural events that pollute the air include forest fires, volcanic eruptions, wind erosion, pollen dispersal, evaporation of organic compounds and natural radioactivity. Pollution from natural occurrences are not very often. Human activities that result in air pollution include: 1. Emissions from industries and manufacturing activities Have you seen a manufacturing company before? You will notice that there are long tubes (called chimneys) erected high into the air, with lots of smoke and fumes coming out of it. Waste incinerators, manufacturing industries and power plants emit high levels of carbon monoxide, organic compounds, and chemicals into the air. This happens almost everywhere that people live. Petroleum refineries also release lots of hydrocarbons into the air. 2. Burning Fossil Fuels After the industrial age, transportation has become a key part of our lives. Cars and heavy duty trucks, trains, shipping vessels and airplanes all burn lots of fossil fuels to work. Emissions from automobile engines contain both primary and secondary pollutants. This is a major cause of pollution, and one that is very difficult to manage. This is because humans rely heavily on vehicles and engines for transporting people, good and services. Fumes from car exhauts contain dangerous gases such as carbon monoxide, oxides of nitrogen, hydrocarbons and particulates. On their own, they cause great harm to people who breath them. Additionally, they react with environmental gases to create further toxic gases. Click here to see the effects 3. Household and Farming Chemicals Crop dusting, fumigating homes, household cleaning products or painting supplies, over the counter insect/pest killers, fertilizer dust emit harmful chemicals into the air and cause pollution. In many case, when we use these chemicals at home or offices with no or little ventilation, we may fall ill if we breathe them. What are the common air pollutants around? Carbon Monoxide (CO) Fuel combustion from vehicles and engines. Reduces the amount of oxygen reaching the body’s organs and tissues; aggravates heart disease, resulting in chest pain and other symptoms. Ground-level Ozone (O3)  Secondary pollutant formed by chemical reaction of volatile organic compounds (VOCs) and NOx in the presence of sunlight. Decreases lung function and causes respiratory symptoms, such as coughing and shortness of breath, and also makes asthma and other lung diseases get worse. More on Ground Level Ozone Here Lead (Pb) Smelters (metal refineries) and other metal industries; combustion of leaded gasoline in piston engine aircraft; waste incinerators (waste burners), and battery manufacturing. Damages the developing nervous system, resulting in IQ loss and impacts on learning, memory, and behavior in children. Cardiovascular and renal effects in adults and early effects related to anaemia. Nitrogen Dioxide (NO2) Fuel combustion (electric utilities, big industrial boilers, vehicles) and wood burning. Worsens lung diseases leading to respiratory symptoms, increased susceptibility to respiratory infection. Particulate Matter (PM) This is formed through chemical reactions, fuel combustion (e.g., burning coal, wood, diesel), industrial processes, farming (plowing, field burning), and unpaved roads or during road constructions. Short-term exposures can worsen heart or lung diseases and cause respiratory problems. Long-term exposures can cause heart or lung disease and sometimes premature deaths. Sulfur Dioxide (SO2) SO2 come from fuel combustion (especially high-sulfur coal); electric utilities and industrial processes as well as and natural occurances like volcanoes. Aggravates asthma and makes breathing difficult.It also contributes to particle formation with associated health effects. What are the effects of air pollution? Acidification: Chemical reactions involving air pollutants can create acidic compounds which can cause harm to vegetation and buildings. Sometimes, when an air pollutant, such as sulfuric acid combines with the water droplets that make up clouds, the water droplets become acidic, forming acid rain. When acid rain falls over an area, it can kill trees and harm animals, fish, and other wildlife. Acid rain destroys the leaves of plants. When acid rain infiltrates into soils, it changes the chemistry of the soil making it unfit for many living things that rely on soil as a habitat or for nutrition. Acid rain also changes the chemistry of the lakes and streams that the rainwater flows into, harming fish and other aquatic life. Eutrophication: Rain can carry and deposit the Nitrogen in some pollutants on rivers and soils. This will adversely affect the nutrients in the soil and water bodies. This can result in algae growth in lakes and water bodies, and make conditions for other living organism harmful. Ground-level ozone: Chemical reactions involving air pollutants create a poisonous gas ozone (O3). Gas Ozone can affect people’s health and can damage vegetation types and some animal life too. Particulate matter:  Air pollutants can be in the form of particulate matter which can be very harmful to our health. The level of effect usually depends on the length of time of exposure, as well the kind and concentration of chemicals and particles exposed to. Short-term effects include irritation to the eyes, nose and throat, and upper respiratory infections such as bronchitis and  pneumonia. Others include headaches, nausea, and allergic reactions. Short-term air pollution can aggravate the medical conditions of individuals with asthma and emphysema. Long-term health effects can include chronic respiratory disease, lung cancer, heart disease, and even damage to the brain, nerves, liver, or kidneys. Continual exposure to air pollution affects the lungs of growing children and may aggravate or compli cate medical conditions in the elderly. Air pollution prevention, monitoring and solution. Solution efforts on pollution is always a big problem. This is why prevention interventions are always a better way of controlling air pollution. These prevention methods can either come from government (laws) or by individual actions. In many big cities, monitoring equipment have been installed at many points in the city. Authorities read them regularly to check the quality of air. Lets see more below: Government (or community) level prevention Governments throughout the world have already taken action against air pollution by introducing green energy. Some governments are investing in wind energy and solar energy, as well as other renewable energy, to minimize burning of fossil fuels, which cause heavy air pollution. Governments are also forcing companies to be more responsible with their manufacturing activities, so that even though they still cause pollution, they are a lot controlled. Companies are also building more energy efficient cars, which pollute less than before. Individual Level Prevention Encourage your family to use the bus, train or bike when commuting. If we all do this, there will be less cars on road and less fumes. Use energy (light, water, boiler, kettle and fire woods) wisely. This is because lots of fossil fuels are burned to generate electricity, and so if we can cut down the use, we will also cut down the amount of pollution we create. Recycle and re-use things. This will minimize the dependence of producing new things. Remember manufacturing industries create a lot of pollution, so if we can re-use things like shopping plastic bags, clothing, paper and bottles, it can help. Basic Air Pollution Facts Below are some random facts and info on environmental pollution. Air pollutants (dangerous things that make the air unclean)come in the form of gases or particles. In March 2011, a very powerful earthquake in the sea (tsunami) hit the Japan coast. The sea level rose and water came into the land, damaging 4 of the 6 reactors in the Fukushima Daiichi Nuclear Power Plant. World Health Organisation (WHO) experts confirm that there is slight increased risk of some cancer types for some people who were exposed to the radiation. These included people living in that area and some workers at the plant. Below is a peice of the information given on BBC website: The biggest lifetime risks were seen in those exposed as infants, compared with children or adults. For girls exposed to radiation from the accident as infants, the report found a 4% increase above the lifetime expected risk of solid tumours and a 6% increase above that expected for breast cancer. Boys exposed as infants are expected to have a 7% increased risk of leukaemia above that expected in the normal population. The biggest risk was seen in thyroid cancer, which for infant girls could be up to 70% higher than expected over their lifetime. BBC Website: /news/health-21614722 It is estimated that you breathe 20,000 liters of air each day. This means the more polluted the air is, the more we breathe into our lungs dangerous chemicals. Air can be polluted both indoors and outdoors. Tobacco and other kinds of smoking are examples of indoor air pollution. Sick Building Syndrome is a health condition related to pesticides, insecticides and chemicals we use at home and offices. In the great Smog Disaster in London in 1952, four thousand people died in a few days due to the high concentrations of pollution. Air pollution affects kids more than adults  because, for their body size, kids breathe more air and spend more time playing outside. More hazardous pollutants are discharged into the air each year than are released to surface water, ground water, and land, combined. Motor vehicles produce more air pollution than any other single human activity. One full commuter bus can mean 40 less cars going through your neighborhood. In America, vehicle exhaust contributes roughly 60% of all carbon monoxide emissions nationwide, and up to 95% in cities. Indoor air pollution and health Around 3 billion people cook and heat their homes using open fires and leaky stoves burning biomass (wood, animal dung and crop waste) and coal. Nearly 2 million people die prematurely from illness attributable to indoor air pollution from household solid fuel use. Nearly 50% of pneumonia deaths among children under five are due to particulate matter inhaled from indoor air pollution. More than 1 million people a year die from chronic obstructive respiratory disease (COPD) that develop due to exposure to such indoor air pollution. Both women and men exposed to heavy indoor smoke are 2-3 times more likely to develop COPD Source: WHO Ozone Depletion: Losing Earth’s Protective Layer National Geographic The ozone layer is a belt of naturally occurring ozone gas that sits 9.3 to 18.6 miles (15 to 30 kilometers) above Earth and serves as a shield from the harmful ultraviolet B radiation emitted by the sun. Ozone is a highly reactive molecule that contains three oxygen atoms. It is constantly being formed and broken down in the high atmosphere, 6.2 to 31 miles (10 to 50 kilometers) above Earth, in the region called the stratosphere. Today, there is widespread concern that the ozone layer is deteriorating due to the release of pollution containing the chemicals chlorine and bromine. Such deterioration allows large amounts of ultraviolet B rays to reach Earth, which can cause skin cancer and cataracts in humans and harm animals as  well. Extra ultraviolet B radiation reaching Earth also inhibits the reproductive cycle of phytoplankton, single-celled organisms such as algae that make up the bottom rung of the food chain. Biologists fear that reductions in phytoplankton populations will in turn lower the populations of other animals. Researchers also have documented changes in the reproductive rates of young fish, shrimp, and crabs as well as frogs and salamanders exposed to excess ultraviolet B. Chlorofluorocarbons (CFCs), chemicals found mainly in spray aerosols heavily used by industrialized nations for much of the past 50 years, are the primary culprits in ozone layer breakdown. When CFCs reach the upper atmosphere, they are exposed to ultraviolet rays, which causes them to break down into substances that include chlorine. The chlorine reacts with the oxygen atoms in ozone and rips apart the ozone molecule. One atom of chlorine can destroy more than a hundred thousand ozone molecules, according to the the U.S. Environmental Protection Agency. The ozone layer above the Antarctic has been particularly impacted by pollution since the mid-1980s. This region’s low temperatures speed up the conversion of CFCs to chlorine. In the southern spring and summer, when the sun shines for long periods of the day, chlorine reacts with ultraviolet rays, destroying ozone on a massive scale, up to 65 percent. This is what some people erroneously refer to as the ozone hole. In other regions, the ozone layer has deteriorated by about 20 percent. About 90 percent of CFCs currently in the atmosphere were emitted by industrialized countries in the Northern Hemisphere, including the United States and Europe. These countries banned CFCs by 1996, and the amount of chlorine in the atmosphere is falling now. But scientists estimate it will take another 50 years for chlorine levels to return to their natural levels. Clean Air Kids The Earth is wrapped in a blanket of air called the atmosphere, which is made up of several layers. About 19-30 kilometres above the Earth is a layer of gas called ozone, which is a form of oxygen. Ozone is produced naturally in the atmosphere. WHY DO WE HAVE AN OZONE LAYER? The ozone layer is very important because it stops too many of the suns ultra-violet rays (UV rays) getting through to the Earth these are the rays that cause our skin to tan. Too much UV can cause skin cancer and will also harm all plants and animals. Life on Earth could not exist without the protective shield of the ozone layer. WHAT IS THE OZONE HOLE? Every spring, a hole as big as the USA develops in the ozone layer over Antarctica, in the South Pole. A smaller hole develops each year over the Arctic, at the North Pole. And there are signs that the ozone layer is getting thinner all over the planet. Scientists have discovered that the ozone hole over Antarctica started in 1979, and that the ozone layer generally started to get thin in the early 1980s. The loss of the ozone layer occurs when more ozone is being destroyed than nature is creating. WHAT CAUSES THE OZONE HOLE? One group of gases is particularly likely to damage the ozone layer. These gases are called CFCs, Chloro-Fluoro-Carbons. CFCs are used in some spray cans to force the contents out of the can. They are also used in refrigerators, air conditioning systems and some fire extinguishers. They are used because they are not poisonous and do not catch fire. Most countries have now stopped using new CFCs that can be released into the atmosphere, but many scientists believe we must stop using old ones as well. THE OZONE HOLE AND OUR HEALTH The ozone layer is like a sunscreen, and a thinning of it would mean that more ultra-violet rays would be reaching us. Too many UV rays would cause more sunburn, and because sunburn causes skin cancer, this too would increase deaths. These UV rays are also dangerous for our eyes and could cause an increase in people becoming blind. That is why sun cream and sunglasses are very important. THE OZONE HOLE ON ANIMALS AND PLANTS UV rays can go through water and end up killing small water animals or  plants, called plankton which form the base of the food chain in oceans and seas. Whales and other fishes have plankton as their main food, and if plankton die because of these UV rays, whales will start dying too, because they will not have anything to eat. Large amounts of UV rays could damage all green plants. If the ozone layer keeps getting thinner, there could be fewer and fewer plants on Earth, then there would be less food in the whole world. THE TWO-FACED OZONE GAS Ozone found between 19 and 30 kilometres high in the atmosphere is one of the reasons why we are alive on Earth. But when the gas ozone is found lower down where we can breathe it in, it becomes very dangerous for our health. This ozone is caused by a reaction between air pollution and sunlight and can cause modern-day smog. This is different to the smog that formed in the early 20th century from smoke and fog. What can you do: There are many things we can do to help reduce air pollution and global warming. Use buses and trains instead of cars, as they can carry a lot more people in one journey. This cuts down the amount of pollution produced. Walking or cycling whenever you can will be even better, as it does not create any pollution. It will also be good for your body, as regular exercise will keep you fit and healthy. If your parents must use the car, ask them to avoid using it for very short journeys if possible, as this creates unnecessary pollution. Try to encourage them to share their journeys with other people, for example when they go to work or go shopping. Also encourage them to drive more slowly as this produces less pollution and less carbon dioxide. Energy is produced to generate electricity and to keep us warm. Most energy is produced by the burning of fossil fuels, like coal, oil and gas, which release carbon dioxide, a greenhouse gas. Fuel burnt in our cars also releases carbon dioxide. As an individual, you do not have a lot of control on how your energy is produced. However, you can control the way in which you use that energy. Using less energy means less of it needs to be produced. So less carbon dioxide is released into the atmosphere. We can also help prevent pollution from our own homes which may contribute to acid rain and poor air quality, and increases emissions of carbon dioxide in the  atmosphere. Turning off lights when they are not needed and not wasting electricity will reduce the demand for energy. Less electricity will need to be produced and so less coal, oil and gas will have to be burnt in power stations, which means less air pollution and less carbon dioxide! Pollution formed indoors can be reduced by ensuring that all gas appliances are working correctly. Good ventilation will improve indoor air quality by dispersing biological pollutants like dust mite, and other pollutants such as cigarette smoke. Most of the rubbish we throw away can be recycled, such as glass bottles and jars, steel and aluminium cans, plastic bottles and waste paper. Recycling used materials uses less energy than making new ones. Composting fruit and vegetable waste reduces the amount of rubbish buried at rubbish dumps. What are the Governments doing? Governments throughout the world have already taken action for these different environmental problems (i.e. Acid Rain, Air Quality, Ozone Hole, Global Warming). In their plans they hope to reduce the amount of emissions of greenhouse gases produced by man. About half of the greenhouse effect is caused by our use of energy, especially from fossil fuels. Other sources of energy could be used which do not emit carbon dioxide, e.g. wind power, solar (sun power) and wave power. In the home and at school, we must learn to use energy efficiently and not waste it. Rain is very important for life. All living things need water to live, even people. Rain brings us the water we need. But in many places in the world even where you live, rain has become a menace. Because of pollution in the air, acid gases from factories, cars and homes, the rain is becoming dangerous for the life of every living creature. This rain is known as acid rain. WHAT IS ACID RAIN? Acid gases are produced when fossil fuels like coal and oil are burned in power stations, factories and in our own homes. Most of these acid gases are blown into the sky, and when they mix with the clouds it can cause rain or snow, sleet, fog, mist or hail to become more acidic. The opposites of  acid are alkalis; for example, toothpaste and baking powder are both alkalis. Strong alkalis can also be dangerous, such as ammonia and bleach. Lemon juice, vinegar and cola are all acidic. Rain is naturally acidic, but acid gases make it even more acidic, sometimes as acid as lemon! Nature can also produce acid gases, such as volcanoes. When they erupt, the smoke that comes out of the crater is also full of acid gases. HOW DO WE MEASURE ACIDITY? There is a special scale called the pH scale that measures the strength of acids and alkalis. A low pH number means something is acid. A high number means something is alkali. And something in the middle is called neutral. Acidity can be tested using litmus paper. Usually rain is a little acidic, and has pH of about 5.5, if the pH of rainfall is less than 5.5, then the rain is probably polluted by acid gases. Acids turn litmus paper red, and alkalis turn it blue. With a special paper called universal indicator, you can test levels of acidity. WHAT ARE THE MAIN GASES THAT CAUSE ACID RAIN? When we burn fuels, chemicals called sulphur and nitrogen are released into the air. Once in the air, they mix with water in the air rain, snow, etc and are transformed into different chemicals called sulphur dioxide and nitrogen oxides, which can be very dangerous for plants, animals and people. Most of the sulphur comes from power stations, which make electricity, and also from volcanoes. Most of the nitrogen oxides come from car and truck exhausts. We call air pollution the bad gases that we produce and release in the air. Sulphur dioxide and nitrogen oxides are the most important causes of acid rain. A PROBLEM ALL OVER THE WORLD Air pollution can be carried over long distances. When acid gases are released, they go high up in the sky, and then they are pushed by strong winds towards other countries. The acid rain in Sweden is caused by air pollution in Britain and other countries of Europe. The pollution produced in Britain ends up mostly in Scandinavia countries in northern Europe  including Sweden, Norway and Denmark. In the USA, the winds blow the air pollution to certain areas in Canada. HOW BAD IS ACID RAIN? When rain is acidic, it affects what it falls on: trees, lakes, buildings and farmland. Sometimes rain is not very acidic and does not cause a lot of problems, but when it is acidic, it can be very harmful to the environment. TREES AND PLANTS Acid rain can have terrible effects on a forest. The acid takes away important minerals from the leaves and the soil. Minerals are like vitamins for trees and plants. Without them, trees and plants cannot grow properly. They lose their leaves and become very weak. They are no longer strong enough to fight against illnesses and frost. They become very ill and can even die. Some soils are alkaline, when acid rain falls on them the acid becomes neutral. Plants and trees living on these soils are not in any big danger.. LAKES AND WATER LIFE Acid rain has a terrible effect on water life. Even if the acid rain does not fall straight into the lake, for example, it may enter from rivers and streams. Some of the life in the lake such as fish and plants may end up dying, because they cannot survive in acidic lakes. Thousands of lakes in Scandinavia have no more life in them. They have received so much acid rain for so many years, because of the winds pushing the acid gases, that nothing can survive. You can recognise a lake dead from acid rain by its clean and crystal clear water. But they look clean because there is very little living in them anymore. Tiny plants and animals are mostly unable to survive.. OUR HEALTH Particulates very small particles of debris found in some of the air pollution are one of the main causes of health problems. In towns and cities, these are released mainly by diesel engines from cars and trucks. When we breathe in air pollution, these very fine particulates can easily enter our body, where they can cause breathing problems, and over time even  cause cancer. Water we drink from taps can be contaminated by acid rain, which can damage the brain.. BUILDINGS Acid rain can also ruin buildings because the acid eats into metal and stone. It also damages stained glass and plastics. Some types of building materials are softer than others, and it is the softer ones which are most affected by acid rain. Sandstone and limestone are examples of stone which are fairly soft and are damaged easily. Granite is an example of a harder stone that can resist the effects of acid rain. In many places in the world, ancient and famous buildings and monuments are affected by acid rain. For example, the Statue of Liberty in New York, USA, has had to be restored because of acid rain damage. Buildings are naturally eroded by rain, wind, frost and the sun, but when acidic gases are present, it speeds up the erosion.