It is tri atomic oxygen (03) and is a gas found in the troposphere as well as in the stratosphere. Tropospheric ozone is undesirable since it is a pollutant these‚ causing photochemical smog and greenhouse effect. In the stratosphere‚ it acts as a protectant since‚ (i) It absorbs the dangerous UV-radiations (ii) It helps to trap the weather pattern within the troposphere‚ by generating a temperative inversion in the stratosphere. Tropospheric ozone is increasing due to human activities‚ while
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The ozone layer diminishes more each year. As the area of polar ozone depletion (commonly called the ozone hole) gets larger‚ additional ultraviolet rays are allowed to pass through. These rays cause cancer‚ cataracts‚ and lowered immunity to diseases.1 What causes the depletion of the ozone layer? In 1970‚ Crutzen first showed that nitrogen oxides produced by decaying nitrous oxide from soil-borne microbes react catalytically with ozone hastening its depletion. His findings started
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Date:7.6.2013 Objectives: Part 1: (i)To learn the technique of TLC and the visualization of colourless components. (ii)Identify the unknown drug by a TCL comparison with standard components. Part2 :to learn the separation technique by using TLC plate in separating a mixture of compound by using spinach leaf. Apparatus:UV lamp‚capillary ‚250 ML beaker Materials:aspirin‚acetaminophen‚caffeine‚unknown A‚unknown B‚TLC plates‚ethyl acetate‚Hexane‚acetic acid‚iodine Introduction: Procedure:
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Discussion Using the Thin Layer Chromatography experiment‚ caffeine was found to be the most polar due to the fact that it stayed closer to the stationary phase. Caffeine contains four amine groups that are extremely polar as a result of the hydrogen bond and amide functional group. Acetaminophen was found to be the second most polar analgesic drug tested. Acetaminophen contains a polar alcohol group on one side and amide group on the other but also includes non-polar functional groups that consisted
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PINEAPPLE UPSIDE-DOWN Cake Mixture – Ingredients 150g – butter 150g – sugar 3 – eggs 150g – normal flour 1tsp – b/powder 1tsp – vanilla essence Method 1. Beat or whisk butter & sugar until light & creamy 2. Add egg one at a time 3. Mix flour & b/powder then add into the mixture and mix well 4. Add vanilla (mix well) 5. Grease a cake tin‚ sprinkle over the brown sugar‚ a few flakes of butter & place slices of pineapple on top 6. Pour cake mixture over‚ bake at 150◦ for 45mins
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in a unique way over their lifetime. From the start of Tea Cake and Janie’s relationship In Zora Neale Hurston’s Their Eyes Were Watching God Janie’s identity takes radical changes while Tea Cake goes through minimal adjustment. The marriage of Tea Cake and Janie opens up a new world to Janie. With her previous relationships she has always been
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The Metamorphoses: Apollo and Daphne As soon as Phoebus saw Daphne‚ he fell in love with her‚ and wanted to marry her. His own prophetic powers deceived him and he hoped to achieve his desire. As the light stubble blazes up in the harvested field‚ or as the hedge is set alight‚ if traveler chance to kindle fire too close‚ or leaves one smoldering when he goes off at daybreak‚ so the god was all on fire‚ his whole heart was aflame‚ and he nourished his fruitless love on hope. He eyed her hair
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A Summary of Cake Sometimes life can throw situations at you that can be very bitter‚ but yet sweet. You may have your car not start one morning and you’d have to walk all the way to work‚ but the day would be wonderful walk. This point is made clearer by Debra Gwartney’s essay simply called Cake‚ which is an excellent passage that goes into this subject and other themes such as unhappiness in unbalanced marriages and expectations. This starts off with her in the kitchen‚ starting a delicious
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The motivation behind the Apollo missions was for the USA to be the first people to land on the moon. Russia had beaten us to outer-space and had put a satellite out in space before us. We wanted to be the first ones to reach the moon and to retrieve new information and data. Scientists needed the help of NASA to answer some important questions and hypotheses. Scientists wanted to know the origin of the moon‚ the temperature history of the moon‚ the cause of mascons‚ and the origin of tektites. Scientists
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Assortment of moon-cakes flood markets | A month and a half before the Mid-Autumn Festival‚ moon-cake manufacturers had announced that they would increase the quantity of moon-cakes by 10-20 percent and price them 5-20 percent higher than last year‚ however‚ with more variety in taste and design. | | There are said to be around 250 different varieties of moon-cakes in the market--the most popular being those stuffed with mung beans and lotus seeds‚ and more varieties being added with almonds
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