Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
Define the Ascorbic Acid - Basic Concepts?
Ascorbic acid is a water-soluble vitamin, whose structure is shown in Figure. You would have noticed that its structure resembles glucose.
Figure: Structure of vitamin C (ascorbic acid)
As the name suggests, ascorbic acid is acidic in nature and a pure solution of this white crystalline substance has a pH of about 3. Ascorbic acid also have two possible enantiomers - the L and the D form. The D form of ascorbic acid is generally inactive as anti-scorbutic agents and naturally occurring ascorbic acid occurs in L form. Ascorbic acid is stable in solid form and in acidic solutions but is easily destroyed in alkaline solutions.
Oxidative destruction of ascorbic acid is accelerated by increasing the pH. Some mammals like rat can synthesize the vitamin from glucose by the uronic acid pathway. However, primates like humans and some other animals like guinea pig, bats, fish, birds cannot synthesize this vitamin. They lack the enzyme L gulonolactone oxidase which prevents its synthesis from glucose. Since these species from the animal kingdom cannot produce ascorbic acid, they have to obtain it entirely through the diet. Hence, its importance. The vitamin exists in the body largely in the reduced form with reversible equilibrium with a relatively small amount of dehydro ascorbic acid. Both forms are physiologically and metabolically active. We are already familiar with the functions of vitamin C.
Normal 0 false false false EN-IN X-NONE X-NONE
A simple method used to identify areas of high conservation priority is the selection of countries according to highest species richness. Among the top 12 countries identified this
Dr. Herbert discovers a cell and he is convinced it is a plant cell. However, as a student of his genetics class, you do not agree with him. You do not believe in microscopy and ph
A pair of ovaries are the reproductive organs in woman. They are present just below the kidneys in the abdominal cavity. Each ovary has several sac like structures called ova
What is the main cell organelle involved in cell digestion? What are the properties of that organelle that enable it to do the task? The organelles responsible for intracellula
significant role of suicide cells?
Q. Give Choice of Catheters for Ventriculography? 1) Pigtail Catheter: This catheter developed by Judkins has end hole and side holes. The end hole permits insertion of the c
There are specific sensitive/critical periods in development during which acquisition of certain skills is substantially easier than at other times. In the animal domain there are
Define two ways in which genetic recombination occurs during meiosis. Genetic recombination happens during crossing- over and independent assortment.
Explain the Quebec Colony Counter? It is used for counting the number of colonies in a plate. Culture plate is kept on the screen which is illuminated from beneath. Counting is
Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!
whatsapp: +91-977-207-8620
Phone: +91-977-207-8620
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd