Expalain briefly vitamin A, Biology

Assignment Help:

Vitamin A (Retinol)

Purified vitamin A is a viscous yellowish oil. It is freely soluble in most organic solvents such as methanol, ether, acetone, chloroform and petroleum ether as well as in fatty oils like olive, sesame and groundnut. However, Vitamin A is insoluble in water. It is highly susceptible to the action of atmospheric oxygen and oxygen carriers, further to oxidizing agents and metal ions. Vitamin A is also rapidly destroyed by UV light. Even in diffuse day light, the vitamin A conten of solutions is markedly reduced within  a few hours. You must remember that vitamin A should be stored in a cool place, protected from light under vacuum or inert gas in air-tight containers or sealed ampules. You must understand that vitamin A itself is very unstable against external influences.

 


Related Discussions:- Expalain briefly vitamin A

Special type of wards, Special type of Wards: Additional  accommodatio...

Special type of Wards: Additional  accommodation or differences  in size and shape of some of  the special type of wards e.g. Intensive Care Ward, Infectious diseases ward and

Explain the consequences of malnutrition, Explain the Consequences of Malnu...

Explain the Consequences of Malnutrition? Malnutrition manifests itself in terms of illness and death in all age groups. Children, pregnant women, nursing mothers and elderly a

Chromosomes with spindle fiber, Chromosomes with spindle fiber: The kineto...

Chromosomes with spindle fiber: The kinetochore fibers of spindle attach to the kinetochore region (specialized area in centromere) of chromosome, and align them at the equator of

Traumatic reticuloperitonitis (trp), Tr aumatic reticuloperitonitis (TRP) ...

Tr aumatic reticuloperitonitis (TRP) It is also known as traumatic gastritis, hardware disease or traumatic reticulitis. Et i o l o g y : Frequentl

Definition of somatoform disorders, Definition of Somatoform Disorders: ...

Definition of Somatoform Disorders: The term 'Somatoform Disorders' was introduced in the scientific literature by the American Psychiatric Association in the  third edition o

Genetics, Considering a pair of homologous chromosomes containing a gene ha...

Considering a pair of homologous chromosomes containing a gene having two different alleles how many different genotypes can the individual present?

Explain brachial or radial approach, Q. Explain Brachial or Radial Approach...

Q. Explain Brachial or Radial Approach ? This technique involves performing the coronary angiogram through the right brachial artery in the right ante-cubital fossa. Usually a

What are gene chips, Question  Write a short note on the following 1 St...

Question  Write a short note on the following 1 Stem cells 2 Edible vaccines 3 Biologic Materials 4 Liposomes 5 What are gene chips? Explain any 4 applications of g

What structural features do these organisms, What STRUCTURAL features do th...

What STRUCTURAL features do these three organisms have in common in terms of a) excretory systems b) respiratory systems c) circulatory systems and d) nervous systems ? The species

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

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!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd