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.
What differences would you expect to see among pea seedlings grown for 10 days in total darkness and pea seedlings grown in the light for the similar period of time? The s
Explain Protein Deficiencies in Nutritional Care? A depleted amino acid pool leads to poor wound healing (dehiscence), delayed healing of fractures, anaemia, depressed pulmonar
am not do erection,am sufferin from epididyme
Need an essay in regard to an experiment that I did. Essay Assignment: Experimental Design Now that you have completed several hands-on lab experiments, take a little time to con
STEROID S - These are derived lipids. Cholesterol is must in formation of steroid hormones. In steroids cyclopentanoperhydrophenentherene nucleus ring present. S
Meselson and Stahl demonstrated that DNA replication is a semi-conservative process. Which of the following best explains the definition of "semi-conservative"? A. The two stra
Anticodon is the series of three nucleotides on the transfer RNA molecule which recognizes and pairs with the specific codon on a messenger RNA molecule; it helps in controlling t
What is the function of the collagen fibers of the connective tissue? There are dissimilar collagen types. The major function of these proteins is to keep the shape and the str
Hepaticae (Liverworts) The gametophyte is thalloid body or simple stem and leaves, with aquatic or semi-terrestrial habit. Rhizoids are multiceillular. Some examples : Mar
Q. Define ST Elevation in aVR? Lead aVR often develops ST elevation as a reciprocal of ST depression in lead V2 to V6 or leads 2 and 3. It may occasionally show ST elevation in
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