Vitamin C Content

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OBJECTIVE
To investigate the vitamin C content of different fruit juices. To identify which fruit juices has higher vitamin C content and the lowest vitamin C content. To determine the standard curve of vitamin C based on percentage of vitamin C. To differentiate between fresh juices and carton juices. To consider the reliability and validity of the results.

PROBLEM STATEMENT
Which type of fruit juices has the most vitamin C content?
HYPOTHESIS
The smaller the amount of the fruit juices to decolourise DCPIP solution, the higher vitamin C content in the fruit juices itself. The fresh orange juice gains the highest vitamin C content than other juice (carton juice, fresh lime and fresh lemon).

NULL HYPOTHESIS
All type of fruit juices has the same value of vitamin C content. VARIABLES
Manipulated Variable: Type of fruits juice used
Responding Variable: Volume of Fruit juices decolourise DCPIP solution Control Variable : volume of DCPIP solution, Concentration of DCPIP solution,

INTRODUCTION
Vitamins are organic compounds that are required in very small amounts (micronutrient compound) for maintaining good health. Vitamins are not energy providing foods. Vitamins are divided into water soluble vitamin and fat soluble vitamin. Water soluble vitamin include vitamin B and vitamin C while fat soluble vitamin include Vitamin A, Vitamin D, Vitamin E, and Vitamin K.Every Vitamin that we consume has its ability to function well in our body system which acts as supplement for our health.

Diagram 1.1 show structural formula of ascorbic acid.
Vitamin C is one of the quite famous vitamins among the vitamins. Due to the presence of vitamin C content in majority of fruits such as lemons, oranges, limes. Vitamin C also known as Coenzyme Q10 (CoQ10) which is disturb the activity of the free radical. Free radical can affect the cell membrane by alter it and change the structure of DNA.Free radical can increase risk of many health problem such as cancer and heart disease. With the function as antioxidants, it can neutralise free radical and reduce the damage that they made. Because of its water soluble properties leftover vitamin C will pass through the urine and that`s why we need it regularly in our diet and one more important fact that our body do not able to produce it, so we need to consume it. Also known as ascorbic acid which is the enolic form of 3-oxo-L-gulofuranolactone. It can be prepared by synthesis from glucose, or extracted from plant sources such as rose hips, blackcurrants or citrus fruits. Example of fruit contain vitamin C viphealth.org

Diagram 1.2Example of supplement of
Vitamin C bestlooker.com
Diagram 1.3 Other than that, vitamin C also has other function besides being antioxidants. It also triggers the formation of collagen. Collagen is protein which an important part for the repairing body tissue in our body. Without it the function healing in the body will slow down. Repair and maintain cartilage, bones, and teeth also the job of vitamin C.Besides collagen, it also form important protein for making of skin, tendons, ligaments, and blood vessels. Cholesterol level in our body can be reduced by taking Vitamin C especially in juice. This can be explained by the simple mechanism which is by increasing the function of liver to convert cholesterol to bile acid. It also reduces oxidation of Low Density Lipoprotein and increasing LDL receptor. Thus as the effect, LDL cholesterol can be eliminated from blood rapidly. Vitamin C also can reduce risks of Alzheimer when taking together with vitamin E. Vitamin C facilitates the fabrication of white blood cells which ruin bacteria and viruses. Vitamin C can also lessen the duration and signs of a cold; help decelerate or prevent cataracts. Vitamin C also had its own side effect if we take it excessively, as it will eliminated...
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