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.
Define Physiological effects on the GIT of prebiotics? Since prebiotics are fermented by the gut microflora, they may have physiological effects on the GIT such as: Cont
How can we assess the nutritional status of a CHD infant? Various assessment methods can be used, particularly anthropometrical -weight, length (height), head circumference and
Transplantation - It is implanting of a living or preserved tissue or organ from one site to another side in the same individual or from one individual called donor to recip
Q. What are the major biological functions in which chlorine ions participate? Like sodium cations, chlorine anions actively participate in the regulation of the osmolarity of
What is Metallic implants Metallic implants undergo one or more several surface modifications to enable them to become suitable for implantation. These modifications are passiv
Early embryonic mortality Embryo mortality is a serious problem for farmers, practitioners and researchers. The establishment and maintenance of pregnancy is a highly complica
examples of pisces
Q. What is the difference between diastoleSystole and systole and diastole are the two stages into which the cardiac cycle is divided Diastole is the stage of the cardiac cycle
Explain about the Torbed Dryer? On the other hand, is a variation of the fluidized bed dryer. This is designed for use with particulate foods. Torbed dryers are used to dry haz
Q. What are the endocrine glands involved in the menstrual cycle? What are the hormones in action? The endocrine glands that secrete hormones involved in the menstrual cycle ar
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