Daphnia Experiment Report 1. Introduction Caffeine is found in many plant species‚ where it acts as a natural pesticide. It is found most commonly in cocoa‚ tea and coffee‚ but is also artificially added to some soft drinks such as cola to act as a flavour enhancer. When consumed by humans‚ caffeine works as a stimulant causing amounts of released neurotransmitters to be increased. High use of caffeine has been related with raised blood pressure‚ restlessness‚ insomnia and anxiety which‚ in
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that are similar to the effects of the medication. Scientific research has shown that coffee with caffeine‚ which is classified as a stimulant‚ where suppresses chemicals in the brain rather than liberate‚ because of the similarity of chemical caffeine with a substance in the brain called adenosine secreted nerve endings to curb activity of brain cells‚ when eating a cup of coffee‚ the substance Caffeine takes site adenosine‚ which prevents adenosine from inhibiting activity of brain cells‚ which puts
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TITLE: Effect of the caffeine on the heart rate OBJECTIVE: To investigate the effect of the caffeine on the heart rate of living organisms. INTRODUCTION: * Daphnia Daphnia are small‚ planktonic crustaceans‚ between 0.2 and 5 mm in length. Daphnia are members of the order Cladocera‚ and are one of the several small aquatic crustaceans commonly called water fleas because of their saltatory swimming style (although fleas are insects and thus only very distantly related). They
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athletes today‚ and there have been a lot of questions raised about the long-term effects of them. There are a lot of different brands in this industry‚ but most of the products contain the same main ingredients: Creatine‚ nitric oxide‚ vitamin B‚ and caffeine. There has been quite a bit of research done on these ingredients individually‚ but together they have not been studied very much‚ which is why a lot of athletes avoid them. Another problem with these products is that athletes are becoming dependent
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or harmful but until now health experts cannot prove the future of it. Experts were concerned about caffeine in coffee and they chose coffee to conduct studies on caffeine as it is a widely consumed and accepted food stimulants. There is much debate on the safety of caffeine. The results from studies‚ even in carefully controlled scientific experiments‚ were contradictory on the effects of caffeine. Most of the studies were done on laboratory animals so scientists displayed uncertainty on whether
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Clay Internal Assessment Design Question: Does the caffeine in Coca-Cola affect blood pressure? Hypothesis: The amount of caffeine in Coca-Cola will cause to the adrenal glands‚ located on the top of the kidneys‚ to release more adrenaline which will in turn cause an increase in blood pressure. As the amount of Coca-Cola decreases‚ so will the difference between initial blood pressure and blood pressure after the consumption of the caffeine. Variables: Independent Variables | Dependent Variables
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Solid-liquid extraction and liquid-liquid extraction of caffeine from tea leaves Andrew Jensen Lab partners: Jamie Pawluk‚ Joe Luong 230105559 Chem 250 L2 Oct‚4‚2012 Introduction: Extraction is the experimental procedure of obtaining a desired compound with the use of a solvent from either a liquid or solid mixture. Solid-liquid extraction involves the removal of organic compounds from solid material. This method of extraction may be achieved through extraction of the organic compound
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drugs to measure the change in their short-term cardiac function; ethanol‚ caffeine and nicotine. Ethanol‚ found in drinking alcohol is a
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Title: Separation and Identification of the major components of common over-the-counter painkilling drugs Purpose: 1.To separate acetaminophen‚ aspirin and caffeine from painkilling drugs. 2.To determine the melting points of acetaminophen‚ aspirin and caffeine 3.To identify the separated components(acetaminophen‚ aspirin and caffeine) by thin-layer chromatography Apparatus and Reagents Used : 1. 4:1 (v/v) 1-Butyl ethanoate/ethanoic acid 2. 3M Sodium hydroxide solution 3. 3M Hydrochloric
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solely a product of caffeine‚ but coffee has proven healthier than one would think with regard to its ability to fight diseases and promote longevity by protecting body cells‚ the liver‚ the colon‚ and the heart. Ninety percent of Americans consume caffeine every day (Brian‚ 2000). For those who once sacrificed their coffee drinking ways‚ the physical and mental advantages of coffee consumption are healthy and exciting. The caffeine‚ in coffee has many effects on the body. Caffeine has a medical name
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