PPT-Isolation of Caffeine from Tea Leaves

Caffeine Alkaloid Purine Ring System Stimulant 50 200 mg Diuretic Caffeine Found in natural sources Coffee Tea Kola nuts Cocoa beans Tea Caffeine 5 by weight Soluble in hot water. Caffeine is found in numerous plants the most widely consumed being coffee tea cola nut cocao pod guarana and mat It is estimated that in North America between 80 and 90 percent of adults and children habitually consume caffeine About 15 of the gene Manmade caffeine is sometimes added to foods drinks and medicines Ninety percent of people in t he world use caffeine in one form or another In the US 80 percent of adul ts consume caffeine every day the average adult has an intake of 200 mg per da To the average Joe questioning the existence of caffeine addiction probably seems absurd The web abounds with quotes and expos57577s about the addictive nature of caffeine using catchy slogans about coffee that borrow from other substance addiction By Sarah French. Eng 104-43. November 16,2009. Addiction is defined as being abnormally tolerant to and dependant on something that is psychologically or physically habit forming. Once caffeine enters the blood stream it only takes minutes for the caffeine to reach the entire body . Jennifer Velez. Kaplan University. HW499. What is Caffeine?. Caffeine . is a chemical found it plants that stimulates . the . central nervous system (. CNS), heart, muscles, and the centers that control blood . Did you know… . Caffeine is a DRUG. What is Caffeine found in… . Brainstorm. !. C. offee. Tea. Energy drinks. Pastries . Chocolate. Coca cola . Ice cream. Soft drinks . Cakes . What it does…. Caffeine acts as a stimulant which increases alertness in the body. of . Caffeine. References:. Slayden: pp. 47- 49. Pavia: pp. 24, 73 – 84 . Note: These pages are not in the GMU version of the . Pavia . text sold in the book, only in the primary text . that . we do not use anymore. Rob “Rockstar” Flynn. Steele “Full Throttle” Taylor. Or Great Thing?. Rough . Timeline . of . Caffeine in America. Tea Gains Prominence. Coffee. Dr. Pepper. Coca Cola / Pepsi. Jolt Cola. Red Bull. Names. Anhydrous Caffeine. Cafeina. Caffeine Anhydrous Citrated. Caffeine . Trimethylxanthine. . Sodium . Benzonate. Scientific names. 1,3,7-Trimethylpurine-2,6-dione. C. 8. H. 10. N. 4. O. 2. Slang Terms. Sawada Taiki. Takahashi Y. usuke. （. Hayashi . Haruka. ）. I don’t feel sleepy!!!. . We are sometimes sleepy during class.. . . And . we drink energy . drink or coffee.. 　　. 　. Caffeine. Caffeine, the common name for . 1,3,7-trimethylxanthine. , . It belongs to a group of . methylxanthene. Sources of . caffein. Caffeine is a chemical . that is found naturally in the leaves and seeds of various plants. . Caffeine - Background. Caffeine is . a naturally occurring alkaloid that belongs to a class of compounds called . xanthines. . . It is found . in varying quantities in the seeds, leaves, and . fruits . Caffeine is one of the most widely used drugs in the world.. It is estimated that ______% of adults in the United States regularly drink caffeinated beverages. . It has also been estimated that the average adult caffeine intake in the United States is 200 to 400 mg per day. . Protoalkaloids. . By: Noor . Hisham. Al-. Atraqchi. MSc . pharmacognosy. The purines are consisting of a six-membered pyrimidine ring fused to a five-membered imidazole . ring.. three well-known examples are :.