Biology SL Internal Assessment What is the effect of heat on vitamin C concentrated in lemon juice? Introduction: “Vitamins are complex organic substances that are needed in very small amounts for many of the essential processes carried out in the body.” 1It is estimated and supported scientifically that only a few mg are filling the daily recommendation‚ which is essential for a healthy living. As most of vitamins cannot be produced by our bodies‚ we need to obtain them from
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Vitamins In the early 20th century the discovery of vitamins began. Today there is a chance that there are some vitamins that are still undiscovered. The definition of vitamin is: one of several substances necessary for animal nutrition‚ and occurring in minute quantities in natural foods; numerous types have been distinguished‚ and designated by the letters of the alphabet. Each and every living animal needs vitamins to grow and be healthy. Since the human body can t produce
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abnormally low body weight is often masked by water retention‚ which makes the face moon-shaped and the belly swollen. Deficiency diseases are usually associated with lack of vitamins or minerals. The effects of a vitamin or mineral deficiency on the body depend on the function of the particular nutrient lacking. For example‚ vitamin A is
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Vitamins Vitamin is defined as any of a group of organic substances essential in small quantities to normal metabolism‚ found in minute amounts in natural foodstuffs or sometimes produced synthetically (Dictionary.com‚ 2012). We need vitamins and minerals for our bodies to function properly. By eating a variety of foods‚ we can often supply our bodies with the necessary vitamins it needs‚ but in some cases it is necessary to take a vitamin supplement as well. By eating a good diet in conjunction
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Volumetric Analysis of Vitamin C by Titration The objective of this experiment is to use a redox reaction titration to accurately determine the amount of vitamin C in a sample of lemon juice‚ orange juice‚ or grapefruit juice. Chemistry of Vitamin C The chemical name for vitamin C is L-ascorbic acid. Its molecular formula is C6H8O6; its molar mass is 176.12 g/mole. Ascorbic acid is found throughout the plant and animal kingdoms‚ occurring in citrus fruits‚ hip berries (such as rose
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VITAMINS Introduction Vitamins are organic food substances found only in living things‚ i.e. plants and animals. They are essential for our bodies to function properly‚ for growth‚ energy and for our general well-being. With very few exceptions the human body cannot manufacture or synthesize vitamins. They must be supplied in our diet or in man-made dietary supplements. Some people believe that vitamins can replace food‚ but that is incorrect. In fact‚ vitamins cannot be assimilated without also
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Vitamins Vitamins are vital organic nutrients essential to over all health and are needed for cells and fluids in the body. They are found in all the foods that we eat‚ and must be consumed in small quantities since our bodies cannot make them. They are also available in dietary supplements‚ but those are only suggested if necessary‚ like if the body is not getting enough vitamins from food. Even though vitamins do not supply energy as carbohydrates‚ fats and proteins do‚ they are vital because
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Lab Report: Toothpickase and Enzymes September 19‚ 2012 Olivia DePhillips Lab Partner: Joy Morgan Meyers Signature: Introduction Enzymes are biological molecules that catalyze chemical reactions. In enzymatic reactions‚ the molecules at the beginning of the process‚ called substrates‚ are converted into different molecules‚ called products. Almost all chemical reactions in a biological cell need enzymes in order to occur at rates sufficient for life. Like all catalysts‚ enzymes work
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heart rate of Daphnia‚ was true or false or whether caffeine decreased the heart rate of Daphnia. To determine this you need to test this hypothesis practically; in order to do this you have to make up a range of caffeine solutions of different concentrations; this is the independent variable – the thing that you change during the investigation. You also need a control variable‚ which would be a solution which has no caffeine in at all‚ to compare the results from the caffeine solutions. In addition
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Determining the Concentration of a Solution: Beer’s Law Purpose: The purpose of the experiment is to determine the concentration and formula of an unknown cobalt nitrate solution by measuring absorbance. Introduction: A Colorimeter will be used to determine the concentration and formula of an unknown cobalt nitrate solution. The colorimeter sends blue light from the LED light source to pass through the solution and hit a photocell. A solution with a higher concentration will absorb more
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