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

What is parkinsons disease, Q. What is Parkinson's disease? The Parkins...

Q. What is Parkinson's disease? The Parkinson's disease is a degenerative disease of the nervous system in which the major manifestations are progressive motor disturbances, li

Explain the maintenance requirement of nutritional needs, Explain the Maint...

Explain the Maintenance Requirement of nutritional needs? This is defined as 'the amount of nutrient that is needed to replace the wear and tear of the tissues within the body

Explain plant sources of natural colourants, Plant sources Although the...

Plant sources Although there is a multitude of colours in the plant kingdom, their extraction and use in food systems is not an easy task. Unless the colourants have some outst

What are the dietitians services, What are the dietitians services Diet...

What are the dietitians services Dietitians are engaged in a variety  of  positions and  in a number of  work settings. Of course the largest proportion is  involved engaged in

How a glycosidic bond would be present, A glycosidic bond would be present ...

A glycosidic bond would be present in: Select one: a. acetone. b. methyl-alpha-D-glucose. c. 2-deoxy-beta-D-ribose. d. glucose-6-phosphate. e. fructose-1, 6-bisph

Name the organism included in symbiotic nitrogen fixation, Name the organis...

Name the organism included in symbiotic nitrogen fixation. What are the components needed for this pure? Determine their role. Differentiate among inbreeding and heterosis. The

Describe airway and respiratory support in heart disease, Describe Airway a...

Describe Airway and Respiratory Support in the Newborn ? Like in any other emergency situation a stable airway needs to be established first. Newborns with severe respiratory d

Red flowers is crossed with a white-flowered plant, A plant with red flower...

A plant with red flowers is crossed with a white-flowered plant of the similar species. All the seeds, when grown, produce plants with red flowers. Assuming that the flower colour

#title., poor metabolism phenotype will have

poor metabolism phenotype will have

How do birds reproduce, How do birds reproduce? Birds, like each verteb...

How do birds reproduce? Birds, like each vertebrate, have sexual reproduction. Their embryos develop within shelled eggs having extraembryonic membranes and outside the mother'

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