develop a better catalytic converter in the cars exhaust system to filter out harmful gasses. Chemistry led to the discovery of chlorofluorocarbons (CFC). Chemist further investigated and found that CFC is the main cause for the depletion of the ozone layer. The discovery of this organic compound led to the ban of all items containing CFC. Chemistry also makes our everyday lives easier. Chemistry was used to create the first transatlantic telegraph cable in 1858. This Invention made it faster‚ and
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science into banes. It is said that science is a good servant but a bad master. When we regenerate energy from natural resources like wind‚ sun‚ water and other non biodegradable substances we feel proud but when the consequences lie on ozone layer depletion‚ radioactive radiation make us afraid. I think it’s truly said that good and evil are two sides of a same coin as on one side it has made our life comfortable and easy and also we cannot ignore the other side that science made
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Thin Layer and Column Chromatography of Extracted Total Lipids of Chicken Egg Yolk Aegan Matthew V. Amican‚ Karen Gem B. Ares‚ Ruvie Ann A. Ballester‚ Mark Joseph S. Barcelona‚* Katherine Carmen Isabel G. Calleja‚ Christelle Venus F. Capuno‚ Group 1‚ 2DPH‚ University of Santo Tomas Abstract Lipids are one of the major constituents of foods‚ and are important in our diet for a number of reasons. They are a major source of energy and provide essential lipid nutrients. This experiment determined
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conditioner while I am home. However‚ I reduced the times I open the air conditioner because from this subject I wonder that it will release Chlorofluorocarbons (CFCs). Man–made CFCs are the main cause of ozone depletion in the stratosphere and it will cause the development of skin cancer since ozone concentration of stratosphere reduced. Hence‚ I try to not open air conditioner and use fan to substitute. On the whole‚ I learned a
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Experiment 3: The preparation of acetaminophen (paracetamol) with thin layer chromatography (TLC) to monitor the reaction. Abstract: This experiment is to demonstrate the preparation of paracetamol and its properties. Reflux and filtration of 4-aminophenol and acetic anhydride formed the crude sample. Further analysis of dry white crystals were used to give quantitative measurements and a percentage yield of 46% was obtained. The overall conclusion is that the acetic anhydride reacted with the
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going up around the world. The pollutants in the air are causing the ozone to get thinner and thinner‚ global warming has become a major problem‚ the ice melting in arctic places‚ hurricanes tearing through towns that have never had them before‚ tsunamis destroying everything in its path in China‚ and earthquakes killing and destroying thousands of people‚ homes‚ and businesses. The atmosphere is composed of five concentric layers; the troposphere‚ stratosphere‚ mesosphere‚ thermosphere‚ and exosphere
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In the mid-twentieth century the earth’s average temperature is increasing due to the fact that global warming is taking place. Global surface temperature has increased about a degree in the past century. The progressive gradual rise of the earth’s surface temperature thought to be caused by the greenhouse effect is responsible for changes in global climate patterns. An increase in the earth’s atmospheric and oceanic temperatures is widely predicted to occur due to an increase in the greenhouse
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Abstract. In a world that is becoming increasingly industrialized‚ and in a world where more people can afford to drive cars‚ air pollution is becoming a very big problem. While there are those who would debate whether or not our air pollution is causing global warming‚ versus the earth ’s natural warming process since the last Ice Age. Definitive proof may or may not be found anytime soon. What is certain‚ however‚ is that there are confirmed problems caused by air pollution. These problems include
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systems that are hard at work supporting the balance of our climate and protecting our planet. Figure 1.1 (Wikimedia‚ 2012) Our Atmosphere The atmosphere is best described as a series of concentric circles enveloping our earth. Each circle is layer with a unique chemical composition‚ temperature range and function. Chemical Composition of the Atmosphere The current molecular composition of Earth’s atmosphere is diatomic nitrogen (N2)‚ 78.08 percent; diatomic oxygen
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Jenna Nadia Rasbi Putri Amianna / 114214027 Small Steps for a Bigger Change Realize it or not‚ we are now facing a serious crisis on our nature; the crisis of global warming. Global warming itself is a term used to describe the change of the temperature of the earth that can finally change the climate on earth. We have known it for a long time that our earth is becoming hotter year by year. There are a lot of things that can cause global warming. Air pollution is one of the causes that can
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