Abstract This work describes the extraction of caffeine from tea leaves to determine its % caffeine. The extraction process selectively dissolves one or more compounds in a mixture into an appropriate solvent. In this experiment‚ it was visible in the process wherein the components of the tea leaves were dissolved in two solvents‚ water and dichloromethane (DCM)‚ with DCM used for multiple extractions. The organic layer was evaporated and the determined % caffeine was 0.12%. Furthermore‚ the purified
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“CAN CACAO LEAVES KILL PESTS?” SUBMITTED BY: LOUIE ANNE C. DIVINAGRACIA SUBMITTED TO: MADEL F. VALENCIA I. INTRODUCTION A. Background of the study We all know that insects can be seen everywhere and the only way to prevent these insects are to use insecticides. For us‚ a house is a place of residence. It is usually a place in which an individual or a family can rest‚ store personal property‚ and prepare food in able for the house fulfils its function‚ we need to eliminate some
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America has always been known as the land of oppurtunity‚and as a place to create a better life. However‚ one group in particular‚ the Puritans‚ had a specific reason to leave England and move to the New World. In the early eighteenth century‚ a rise in religious reform had spread in England‚ bringthing forth a popularity in Puritanism. Puritans were those who sought to reform politics and correct institutions. They critized Charles I and James I on how they neglected their nation‚ ignoring imperfections
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Should Men Receive Paternity Leave with Pay? Women give birth almost every day around the globe‚ yet some dads are hardly ever present to give them support. Additionally‚ some dads cannot manage to give up their paycheck‚ which their households needs to preserve their financials. Most companies scarcely pay male workers paternity leave to spend some time with their partners when they have a kid‚ suffer a stillbirth‚ or adopt a young child. Men wanting to take paternity leave to help their partner under
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didn’t leave my bitterness and hatred behind‚ I’d still be in prison.” In today’s society‚ an issue exists with too many inmates occupying prisons. Many of these inmates in prisons do not get freed with the same ideas as Nelson Mandela. The solution for this issue is to put inmates to use for the public and only use prisons as holding stations for inmates. Such uses include entertainment‚ military‚ and public services. By forcing inmates to serve as a use for the public‚ inmates will leave prison
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Extraction of Caffeine from Tea Leaves Introduction Caffeine is soluble in boiling water and as a result it is easily extracted from tea bags by steeping in hot water. This process leaves behind the water insoluble portions of the tea bag. However‚ water extracts more than just caffeine‚ so a final separation is done with an organic solvent that will dissolve primarily caffeine. The organic solvent used in this experiment is Dichloromethane (CH₂Cl₂). Dichloromethane is less polar than water
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ant that can’t march. Bedbugs One tick asked another‚ “Whatever happened to the two bedbugs that fell in love?” the other tick said‚” didn’t you know? They got married in the spring.” Bees What’s the difference between a sick horse and a dead bee?---Once is a seedy beast‚ the other is a bee deceased. The Definition of Archive in the Comic Dictionary—an archive is where Noah kept his bees. If you have a bee in your hand‚ what do you have in your
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In Why We Get Sick‚ Nesse and Williams focus on the increased prevalence of allergies such as hay fever‚ and underemphasize the amount that food allergies have increased in a similar time span. When the book was first being written the main increase in allergies were
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The most common meat tenderizer used in India is raw (un-ripened) papaya The leaves‚ and green skin of raw papaya contain an enzyme called Papain. The connective tissue in the meat breaks down when it comes in contact with Papain. Papaya is preferred tenderizer for red meat (Lamb‚ Mutton‚ Goat‚ Beef). It can be used for fowl. The preferred tenderizer for fowl is Yogurt How to use yogurt to tenderize meats? You should NOT discard the tenderizing paste. When the connective tissue gets gelatinized
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Will Marketing Leave SEO In The Dust The internet has become an integral part of our life. It has found its way into almost every possible entity that the human mind has created till date. It would seem awkward if we think for a second about our lives without the presence of internet. Statistics shows that we spent about 27 hours a week browsing through tons of information and services that the internet provides us. It can be seen early-on that the internet is a hub of crucial and vital information
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