MULTIPLE EXTRACTION OF CAFFEINE FROM DRIED TEA LEAVES USING DICHLOROMETHANE Delos Reyes‚ K.‚ Dizon‚ G.J.‚ Enriquez‚ J.R.‚ Estrada‚ G. and Garcia C. Group 4 2G Med Tech Organic Chemistry Laboratory ABSTRACT Caffeine was extracted from dried tea leaves by multiple extraction technique. 10g of tea leaves was boiled in a solution of 4.4 g anhydrous sodium carbonate and 100ml distilled water and was extracted three times using 20 ml of dichloromethane. Theresidue was collected by decanting
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makers of sports drinks spend millions of dollars advertising the benefits of their products. One of these featured benefits is often electrolytes‚ which your body loses as you sweat. In this chemistry science fair project‚ you will compare the electrolytes present in a sports drink with those in orange juice to find out which drink has more to replace the ones you lose as you’re working out or playing sports. When you are finished‚ you might even want to make your own sports drink! Objective To
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Swedish counterparts‚ which of the following strategies would be advisable to Ikea? a. standardization. b. new product development. c. adaptation. d. withdraw from market. e. lower prices to encourage attitude change. Answer: (c) Difficulty: (1) Knowledge: (A) Page: 349 2. In the Australian market‚ rather than manufacturing disposable diapers‚ Proctor & Gamble decided to import them since the size of the market did not warrant local manufacturing
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should not drink coffee? These days lifestyle of children has been changing regarding the way that children drink. Caffeine is one of the biggest problems in the world. Most companies make many things from caffeine such as coffee‚ tea‚ chocolate‚ soda‚ and Energy Drinks. However‚ children under 18 years old don’t know if these things can be dangerous for their health. Children eat or drink these things because parents didn’t tell them that are not good for their health. Children drink coffee every
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/380 Database Design Paper DBM/380 October ‚ 2012 University of Phoenix Database Design Paper A database is a set of programs and applications used to store data‚ this allows the data to be used by different individuals in different areas and access information from it quickly. A database stores the information so it can be used at a later time so additional information can be added‚ taken away‚ or used as needed. Once in the database the data is compressed so it takes up less space
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Performance Review Takes a Page from Facebook Performance Multiplier and Rypple both provides effective performance management systems. They both “aim at achieving” employees to “support the organization’s strategy‚ goals‚ and culture” (Noe‚ Hollenbeck‚ Gerhart‚ & Wright 2011). These programs provide a friendly atmosphere where employees feel comfortable posting questions and comments about experiences and is able to give their input as well. Validity is also measured because employees and managers
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Contracts – MacDougall 2010-2011 Sara Li FORMATION Offer & Acceptance Offer & Invitation to Treat Mere puffs Invitation to Treat Offer Mere puff: no reasonable person would take it as an offer Can the terms of the K (ie offer) only come from one party? * Battle of the forms - last shot/first blow? (Denning in Butler Machine Tool v Ex-Cell-O Corp) * Strict offer & acceptance is reaffirmed in Gibson v Manchester City Council [1979] - only extreme cases might not
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Database Architecture DBM/380 –Database Concepts September 9‚ 2013 Sandra Graca Database Architecture Database systems are a way to collect and store large amounts of data. Essentially‚ database are electronic filing systems that store raw data to be later retrieved as useable information (Skillport‚ ). Using such a tool simplifies the filing and storage of all sorts of information used by businesses today. A common type of database is a customer/inventory database. Different tables
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Caffeine and Sleep • Sleep Topics Caffeine has been called the most popular drug in the world. It is found naturally in over 60 plants including the coffee bean‚ tea leaf‚ kola nut and cacao pod. All over the world people consume caffeine on a daily basis in coffee‚ tea‚ cocoa‚ chocolate‚ some soft drinks‚ and some drugs. Because caffeine is a stimulant‚ most people use it after waking up in the morning or to remain alert during the day. While it is important to note that caffeine cannot
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harder to balance homework assignments‚ parties‚ sports activities and friends. The result is that young people suffer from stress. There are different ways of dealing with stress. Everyone knows that caffeine‚ whether it is in the form of coffee or soft drinks‚ keeps you awake and alert. But caffeine is a drug which can become addictive. In the end‚ like other drugs. caffeine only leads to more stress. A better way to deal with stress is to exercise: Research has proved that physical exercise
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