PPT-Lecture 3a Extraction of Caffeine from Tea Leaves

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 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 Jenna Abantao. Northern Marianas College. English Composition II. Caffeine Addiction. I chose this topic because I want to know how many people or how many percent on the island of Saipan is addicted on caffeine or any beverages.. 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 . From the Beginning of Time to Now. Frankie Roman MD JD. FOCUS Fall. Las Vegas. October 3, 2013. CAFFEINE. From the beginning of Time to Now. Frankie Roman,MD JD. Focus Conference. May 13,2010. History of Coffee. Camellia . sinensis. An . evergreen shrub that produces small white flowers; it grows quickly and is ready for harvesting after three years. . Like . wine, . tea represents several . broad . classes. Females. Michelle Seeger, Sara Wynne, Kori Burnett, Whitney Forde, Ashley Fleming. Introduction. The purpose was to better understand whether or not a low level stimulant can effect physical performance . 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. 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 Health, Performance, Facts, and more! When we wake up in the morning, many of us reach for a coffee to kick-start our day. According to the International Coffee Organization, approximately 1.6 billion cups of coffee are consumed worldwide every day. TEA Tea is the most tasty and accepted beverage by everyone, no matter what the season. The  history of tea is long and complex, spreading across multiple cultures over the span of thousands of years Sugar tastes good. But, did you know that eating too much sugar can cause:. Weight Gain. Heart Disease. Type 2 Diabetes. Tooth Decay. Bad for your Skin. Sugar Rush followed by Sugar Crash. These food/drinks have a lot of added sugar:. Our textbook suggests 240 mg of . caffeine per cup. [Health Canada standard for adults: 400 mg of caffeine per day]. Amount of caffeine in a cup of coffee varies considerably depending on the coffee beans used and the size of the drink. For example ….