Determination of the concentration of vitamin C in fruits/vegetables by using the DCPIP test (2008) Principle : Vitamin C is a strong reducing agent. It can decolorize the blue dye DCPIP. The amount of vitamin C in a food sample can be estimated by the amount of it that is used to decolorize a fixed amount of DCPIP. Apparatus : Test tube‚ clean and dry Test tube rack 5 ml syringe or a good quality squeezing pipette 1 ml pipette
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How is Vitamin C manufactured? Ascorbic Acid Also known as: l-ascorbic acid‚ vitamin C‚ ascorbate A six carbon compound related to glucose. It is found naturally in citrus fruits and many vegetables. Ascorbic acid is an essential nutrient in human diets‚ and necessary to maintain connective tissue and bone. Its biologically active form‚ vitamin C‚ functions as a reducing agent and coenzyme in several metabolic pathways. Vitamin C is considered an antioxidant. http://pubchem.ncbi.nlm.nih.gov/summary/summary
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Cryptococcus neoformans is an encapsulated yeast and an obligate aerobe that lives in the environment throughout the world both in plants and animals. It is often found in bird excrement. People can get infected with C. neoformans through breathing in the microscopic fungus‚ although most people who get exposed to the fungus never get sick from it. Most cases of this infection occur in people who have weakened immune system‚ mainly those who have HIV/AIDS. In 1894‚ Busse‚ a pathologist‚ first described
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studied the defense evoked venom of three C. geographus. The significance of their venom is the paralytic toxins‚ which makes the most of this venom. The toxicity of the venom is needed to attack the prey in a high-speed. They also showed a correlation between the size of the animals and the injected venom. Despite their little size and slow-movement‚ they express a defensive mechanism‚ they extend their proboscis and inject the paralytic toxin which is lethal. C. geographus‚ usually hunt during night
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Some cases Vitamin C has been proven harmful. The only reason we believe that Vitamin C is good for us in large doses is because of a man named Linus Pauling. Linus Pauling was an American chemist‚ biochemist‚ peace activist‚ author‚ and educator. He was the only person to receive two noble prizes by himself
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a. resources are scarce b. goods and services are not scarce c. incomes fluctuate with business cycles d. people‚ by nature‚ tend to disagree 2. Which of the following examples does not illustrate the principle represented by the adage‚ "There is no such thing as a free lunch"? a. Joe needs to pay his rent and his electric bill b. Pete must choose between buying a new flat screen television and buying his textbooks for this semester c. Kevin must decide between studying for his economics exam and
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Effect of Heat on Vitamin C Objective: - To determine whether the concentration of Vitamin C in a fruit juice changes upon heating at a constant temperature for different periods of time. - To investigate how the trend goes (whether the concentration of Vitamin C increases or decreases) if the amount of Vitamin C does change. Theory: - Hypothesis: The concentration of Vitamin C in the fruit juice changes and decreases upon heatingat a constant temperature for increasing periods of time
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Axia College Material Appendix C The Four Functions of Management |Description of Event | | | |Coordinating a bridal shower is an event where management skills were tasked. A | | |specific time was when my sister had a bridal shower. My friend helped with this | |
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to nest. C. Army Ants are nomadic and they are always moving. (Transition): After talking about general issues moving into former topics will be beneficial for my audience to understand well and to remember easily. Body I. There are some interesting and special features of ants. A. An ant brain has about 250 000 brain cells. A human brain has 10‚000 million so a colony of 40‚000 ants has collectively the same size brain as a human. B. Ants can lift 20 times their own body weight. C. The average
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Jim’s C Programming Problems The First 100 (currently up to 74) gcc –ansi -Wall A Varied Collection of Problems for Beginning Students Version 1.0 Last Updated – January 3‚ 2008 Problem 1: Hello World Write a C program that prints out the message Hello World. Problem 2: The Value 6 Write a C program that prints out the value 6. I want you to use the %d format code. Problem 3: The Character P Write a C program that prints out the single character P. I want
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