of a solution containing vitamin C is required to be added to 1 cm3 of blue chemical to change its colour from blue to clear. The experiment users an new and old lemon‚ orange and blackcurrant juice‚ each with varying amounts of vitamin C content. Each experiment has independent and dependent variables. The solutions of soft drinks contain different levels of vitamin C (with old and new varieties) will be the independent variables in the experiment as the vitamin C content is unknown. The dependent
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Investigating the vitamin C content of fruit juices Vitamin C (ascorbic acid) is a water-soluble nutrient which is found in certain foods. It acts as an antioxidant (inhibits oxidation) in the body‚ helping to protect cells from the damage caused by free radicals. The body requires vitamin C in order to make collagen‚ a protein essential to help wounds heal. Vitamin C also improves the absorption of iron from plant-based foods and helps the immune system work properly to protect the body from disease
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I hate orange juice yet I want orange juice right now more than I ever wanted anything. Every day I want something I can never have yesterday it was to be able to have a bath and today its orange juice. Daisy says that once I fully accept that I’m dead that all things that I want will go away. Daisy is what is known as a helper‚ she helps the newly deceased come to terms with being dead so they can move on from the land of the living and join the other spirits. I have fully accepted that I’m dead
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Biology Lab – Vitamin C content of food Aim: To compare the vitamin C content of different fruits using the decolourisation of DCPIP from blue to clear as the indicator. • You first need to estimate the volume of a known concentration of vitamin C solution required to decolourise 2 cm3 of DCPIP solution. • Then you need to determine the volume of fruit juice that decolourises 2 cm3 of DCPIP solution. This gives an estimate of the concentration of vitamin C in fruit juice. • This value
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What type of fruit juice provides the most vitamin C? In my investigation I plan to find out how much vitamin C there is in orange juice‚ pineapple juice and tropical juice and then compare my results to find out which juice has the most vitamin C. The independent variable is the type of juice and the dependant variable is the volume of fruit juice needed to decolourise 1cm3 Of 1% DCPIP solution. DCPIP solution can be used to measure the amount of vitamin C in each juice as an antioxidant
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of two students required: * vitamin C indicator solution * three 50 mL beakers or medicine cups * one 10 mL graduated cylinder * three disposable pipettes * one stirring rod * Sources of Vitamin C: freshly squeezed OJ‚ bottled OJ‚ frozen OJ‚ canned OJ * Optional: container for waste solutions and source of clean rinse water There are two different preparations (starch-iodine or indophenol) that may be used for the vitamin C indicator solution. Neither is more
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Investigating the vitamin C content of fruits and fruit juice Aim: In this investigation‚ I aim to measure and compare whether there is a higher content of vitamin C in a fruit or a juice by measuring the volume of the sample required to decolourise a solution of dichlorophenolindophenol (DCPIP). Introduction: For this experiment‚ I aim to investigate and compare the content of vitamin C in the fruit against the fruit juice. The theory of this method is a titration with dichlorophenolindophenol
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Determination of Vitamin C by an Iodometric Titration Purpose: The goal of this lab is to determine the concentration of vitamin C in juices and Real Lemon. A redox titration‚ involving an iodometric method‚ will be used to do the analysis. The samples will be classified by their Vitamin C content. Introduction: Although most mammals can synthesize vitamin C‚ or ascorbic acid (C6H8O6)‚ from sugars‚ man must ingest considerable quantities of this substance. The National Academy of Sciences recommends
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Estimating Price Elasticities with Theory-Based Priors Author(s): Alan L. Montgomery and Peter E. Rossi Source: Journal of Marketing Research‚ Vol. 36‚ No. 4‚ (Nov.‚ 1999)‚ pp. 413-423 Published by: American Marketing Association Stable URL: http://www.jstor.org/stable/3151997 Accessed: 22/07/2008 16:25 Your use of the JSTOR archive indicates your acceptance of JSTOR ’s Terms and Conditions of Use‚ available at http://www.jstor.org/page/info/about/policies/terms.jsp. JSTOR ’s Terms and Conditions
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Year 10 Science Biology Unit “Changes Over Time” Conditions Key Dates Time Allowed: class time and 5 weeks own time Task Given Week Beginning 17th February Plagiarism: refer to school policy Submit choice of species 21st February Harvard Referencing: refer to sources No late submissions will be accepted without an approved extension – speak to teacher before 17 March Submit work completed to date Midnight 2nd March Submit Final Assignment Midnight 21st March Criteria
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