服务承诺

资金托管

原创保证

实力保障

24小时客服

使命必达

关于我们

51Due提供Essay，Paper，Report，Assignment等学科作业的代写与辅导，同时涵盖Personal Statement，转学申请等留学文书代写。

51Due将让你达成学业目标

名企实习

私人订制你的未来职场世界名企，高端行业岗位等在新的起点上实现更高水平的发展

积累工作经验

多元化文化交流

专业实操技能

建立人际资源圈

Vitamin_C_Research_Paper

2013-11-13 来源: 类别: 更多范文

Daniel Garcia Period 6 October 9, 2012 Research Paper Rough Draft WORKS CITED Weil, Andrew. "Supplements & Herbs." Facts on Vitamin C. N.p., n.d. Web. 08 Oct. 2012. . Goodner, Kevin L. "Vitamin C and Citrus Juices." Vitamin C and Citrus Juices. USDA Citrus and Subtropical Products Research Laboratory, 1 Feb. 2006. Web. 08 Oct. 2012. . "Which Fruit Juice Contains the Greatest Amount of Vitamin C'" Education.com. N.p., n.d. Web. 08 Oct. 2012. . Does the level of Vitamin C change overtime in Orange Juice' Procedure to test for vitamin C content. (With this method, you can compare relative vitamin C content and rank foods from highest to lowest, but you won't be able to get exact concentrations.) You'll need some 2% iodine solution (find it at your local pharmacy) to prepare the vitamin C indicator solution described in steps 1 to 4. 1. Mix 1 tablespoon of cornstach into enough water to make paste. 2. To this paste, add 250 milliliters of water and boil for 5 minutes. 3. Add 10 drops of the starch solution to 75 milliliters of water (use an eyedropper). 4. Add enough iodine to produce a dark purple-blue color. Now your indicator solution is ready. 5. Put 5 milliliters of indicator solution (about 1 teaspoon) in a 15-milliliter test tube (one for each sample). 6. To the test tube, use a clean eyedropper to add 10 drops of juice from the fruit or beverage (for solids, pulp them in a blender and strain the juice). Re-clean the eyedropper for each sample. 7. Hold the test tube against a white background. Line up the tubes from lightest to darkest purple. The lighter the solution, the higher the vitamin C content. That's because vitamin C causes the purple indicator solution to lose its color

上一篇：Was_Germany_Mostly_Responsible 下一篇：Unit_5-Principles_of_Safeguard

代写范文——更多范文

代写范文

留学资讯

写作技巧

论文代写专题

服务承诺

关于我们

名企实习

Vitamin_C_Research_Paper