Experiment No. 1 ISOLATION OF CAFFEINE FROM TEA I. Introduction Caffeine is a very common substance and is found in coffee‚ tea‚ soft drinks‚ chocolate‚ and "stay-awake" pills such as Vivarin. It can be synthesized or isolated from natural sources. Caffeine constitutes approximately 4% of tea and coffee leaves‚ and is also found in cola nuts and cacao beans. Caffeine is a member of the class of compounds organic chemists call alkaloids. Alkaloids are nitrogen containing basic compounds that are
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Lessons from Esso’s Gas Plant Explosion at Longford In September 1998 Esso Australia’s gas plant at Longford in Victoria suffered a major fire. Two men were killed and the state’s gas supply was severed for two weeks‚ causing chaos in Victorian industry and considerable hardship in homes which were dependent on gas. What happened was that a warm liquid system (known as the “lean oil” system) failed‚ allowing a metal heat exchanger to become intensely cold and therefore brittle. When operators
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DNA EXTRACTION FROM KIWI ISGR SCIENCE Aalah Yousif‚ Ella Sobek April 27‚ 2012 Background All living organisms (plants‚ animals‚ and bacteria) are made up of cells. Any cell consists of many parts but the parts that play the key roles are the nucleus‚ cell membrane‚ and cytoplasm. The nucleus is like the “brain” of the cell (that also contains DNA). The cell membrane is like a wall that guards the cell. And the cytoplasm is a jelly-like substance which contains other smaller organelles like
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****** Professor ****** Eng 104-13 3/2/2013 “From Violence to Victory” In the “Letter from Birmingham Jail‚” Martin Luther King effectively presented his arguments by using Pathos. King pathos is effective throughout his letter because he makes strong emotional connection with the reader. In the words of St. Thomas‚ Martin Luther King quotes‚ from a jail cell in Birmingham‚ “An unjust law is no law at all” (King). After an affiliate from Birmingham invited MLK into a non-violent action program
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This review critically reviews the book “Men Are from Mars‚ Women Are from Venus” written by John Gray‚ Ph.D. in 2002. John Gray is an American author and relationship counselor. This book is about the relationship between women and men. The book states that most of common relationship problems between men and women are a result of psychological differences between the genders‚ and that each gender accepts and propagates their own society and customs‚ but not to those of the other. The book
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Mrs. Odem made the rounds kissing and hugging each boy. Charlie recognized the love and good hearts of the family (p. 70-72). This reminds me of the family in the book Maniac Magee. The large boisterous Pickwell family from the West End and the caring traditional Beale family from the East End were both welcoming and loving families despite enduring judgments and prejudices against
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abundant in the Philippines. It can treat Tinea infections‚ insect bites‚ ringworms‚ eczema‚ scabies and itchiness. Acapulco leaves are very rich in alkaloids. Alkaloids are a group of naturally occurring chemical compounds that contain mostly basic nitrogen atoms. Alkaloids are very toxic to some organism. Acapulco plants can be a main component of a mosquito killer. The product is also for minimal consumption of mosquito killer. Unlike the commercial mosquito killer‚ the Acapulco plant extract cost
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We are Not Apart from Nature We Are Not Apart From Nature Sitting alone in the forest on a quiet day in December‚ feeling rather ill‚ depressed‚ and in need of rest‚ I let my mind wander as the cold breeze blew all around me. The world‚ at that moment‚ appeared much more peaceful and much more accepting. The mental war I was fighting seemed to be subdued‚ at least for a moment. The trees swayed ever so slightly and birds chirped demurely‚ their life totally unaffected by my presence. In
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Question: Are you a representative from from the ambulance company that took Laura to the hospital? Answer: Yes. Question: Do you know what injuries they were transporting her for? Answer: Possible symptoms of a concussion‚ broken arm‚ and memory loss. Question: Were you aware that she had jewelry on when she entered the ambulance but not when she exited? Answer: Yes. It is standard procedure to remove all jewelry from patients. Question: Do you hire people to work as EMT’s that have a past criminal
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Education comes not from books but from practical experiences. An educated person has always been described as someone who reads many diverse books‚ while it is also commonly said that experience is the best teacher. The widely debated topic of the primary source of education has been a prima discussion as people tend to mix up the importance of books and practical experiences in the process of education.” In this essay‚ I will discuss the importance of both parties in education and express my views
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