Enzymes are a type of protein. They are catalysts meaning they speed up the rate of the reaction. Enzymes activity depends on the concentration of the substrate‚ temperature and the pH. The more concentrated the substrate is the more reactive the enzyme is. The optimal pH for an enzyme is 7.5 and the optimal temperature for an enzyme is 53 Celsius. Extremes in the temperature and the pH of an enzyme can denature therefore destroy it. The enzyme that is in this experiment is Amylase. Amylase is found
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speed up the rate of reaction without itself being used up in the process. Enzymes provide an alternate reaction pathway by lowering the activation energy needed for a reaction to occur. For two molecules to react they must collide with each other‚ however‚ they have to collide with sufficient energy. Sufficient energy means that between them they have enough energy to overcome the energy barrier to reaction. This is called the activation energy. Even though enzymes can alter the rate of reaction
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the product caffeine. Thesis Statement: there are numerous side effects and health problems associated with caffeine. Caffeine should not be consumed to “energize”. Many often turn to caffeine to help‚ and doing so will lead you to become addicted to the substance much like a drug and will affect many aspects of your everyday life. Introduction: I. How many of you have used caffeine related products to boost yourself in the morning or before a major task for the day? II. Caffeine seems like
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Caffeine plays a big role in todays society. Caffeine is found in some beverages such as coffee and tea (Sciencedaily.com). Americans consume 400 million cups of coffee per day‚ equivalent to 146 billion cups of coffee per year (The Huffington Post‚ 2011). This made the United States the leading consumer of coffee in the world (The Huffington Post‚ 2011). People never realize the effect caffeine can have on their body. Caffeine could be a reason why you become dehydrated. Can caffeine cause dehydration
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Determination of Caffeine in Tea Samples CONTENTS 1. 1. Introduction 2. 2. Theory 3. 3. Uses of Caffeine 4. 4. Effects of Caffeine 5. 5. Procedure 6. 6. Observations 7. 7. Result INTRODUCTION Tea is the most commonly and widely used soft beverage in the household. It acts as a stimulant for central nervous system and skeletal muscles. That is why tea removes fatigue‚ tiredness and headache. It also increases the capacity of thinking. It is also used for lowering body temperature
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The hypothesis made prior to the experiment was not correct - the distilled water did result in the most weight gain (g); however‚ the 5% salt concentration did not result in the least weight gain (g). Table 1 clearly highlights that the 3% salt concentration resulted in the least weight gain (g). The distilled water resulted in the most weight gain (g) because the solution is hypotonic – a hypotonic solution results in the water diffusing into the cell because the molecules of the substance are
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Effects of Caffeine Caffeine has been a hot topic in the medical community as of late. Studies have shown that the effects of caffeine are undoubtedly beneficial to people’s health. However‚ other studies have shown that its effect can have a negative impact on health. So what is caffeine and where do you find it? According to Merriam-Webster’s dictionary‚ it is "a bitter alkaloid C8H10N4O2 found especially in coffee‚ tea‚ and kola nuts and used medicinally as a stimulant and diuretic‚" (Merriam-Webster)
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The heart is a vital organ in the human body. Though only the size of the fist‚ it pumps blood to the rest of the body by rhythmic expansion and relaxation. The frequency of this cardiac cycle is measured by the term heart rate. The heart rate is the number of contractions (beats) of the heart in a minute. The heart rate tends to increase with response to a wide variety of conditions like vigorous physical activity or according to our hypothesis‚ music. Music has an arousal effect which is related
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The effects of environmental temperature on respiration rates of mice were observed in this experiment. I hypothesized that when environmental temperature decreased‚ the respiration rate of mice would increase. I predicted that if environmental temperature decreased‚ the respiration rate of mice would increase. The respiration rate of the endotherm was measured using the Qubit/Vernier system and the S152 CO2 gas sensor‚ a device that measured the CO2 concentration in the air. The independent variable
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those that didn’t know this‚ caffeine is a drug. B. Statistics have proven that any amount exceeding “five or more cups of coffee will increase the risk of cardiac arrest (Caffeine).” “60 percent of the total caffeine consumed in the United States is from coffee as well as 16 percent comes from soft drinks and teas (Caffeine).” Many children and adults consume coffee on the daily and they do so to get energy into their body. “The average daily consumption of caffeine for adults in the United States
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