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.
how does chamaleon change its colour
R in d e rp es t It is also known as cattle plague resulting in high fever, diarrhoea and high mortality rates. In year 2006, OIE has declared that India is free from rin
What is the endocrine function of the placenta? The placenta is not a permanent gland of the endocrine system but it also has endocrinal function. The placenta produces estroge
Chromosomes, colored bodies, are composed of proteins and DNA; so are chromatids. At metaphase I there are 46 chromosomesaligned in pairs along the human cells equatorial plate. At
Conformational Protection - Azotobacter In conformational protection a Fe-S redox protein provides protection to the enzyme. The protein gets oxidised in the presence of oxyge
Where do the light reactions occur in prokaryotic and eukaryotic cells?
R a d i o g r a p h y: Radiograph or X-ray remains the most well-known and primary diagnostic tool of all the imaging modalities. It works b
Jet Lag Disturbance of body and environmental rhythms resulting from a rapid change in time zones gives rise to jet lag, which is characterized by insomnia, decreased quality
Ribosomes: are minute nonmembranous and dense spheroidal particles or granules. First observed by electron microscopy by palade 1955. Being only about 200 to 250 a in di
Which of the following best defines the reason why DNA ligase is needed to complete the replication of internal chromosomal segments? A. DNA ligase is able to delete the last n
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