Define the dietary sources and chemical forms, Biology

Define the Dietary Sources and Chemical Forms?

Isoflavones and coumestans are the most common compounds. Soybeans and soyfoods are the most important sources, containing approx. 0.2-1.6 mg per gram dry weight; although chick peas and other legumes also contain them. Second generation soy foods e.g., products like tofu yoghurt contain 6-20% of the isoflavones present in the whole beans. Isoflavones may be present in unconjugated form (aglycones) e.g. daidzein, genistein, or as glycosides such as daidzin, genistin.

Non-fermented soy foods like tofu contain greater levels of glucosides whereas fermented foods e.g. tempeh have higher amounts of aglycones due to enzymatic hydrolysis during the fermentation process. A large number of cournestans e.g. coumestrol in alfalfa have been isolated from plants but only a few possess uterotropic (stimulating growth of the uterus) activity. The highest amounts of coumestans are present in clover and alfalfa sprouts (5.6 and 0.7 mg/g dry weight). Other sources are split peas, kala chana, lima beans and soy bean sprouts (15-80 mcg/g dry weight). Lignans do not induce estrus but are considered to be phytoestrogens because they have oestrogen-like actions. They are present in plant foods and human biological fluids, plant lignans being converted by bacterial action to mammalian lignans in the GIT. Secoisolariciresinol and rnatairesinol are plant dietary precursors of the mammalian lignans, enterodiol and enterolactone.

Posted Date: 6/21/2013 7:28:49 AM | Location : United States

Related Discussions:- Define the dietary sources and chemical forms, Assignment Help, Ask Question on Define the dietary sources and chemical forms, Get Answer, Expert's Help, Define the dietary sources and chemical forms Discussions

Write discussion on Define the dietary sources and chemical forms
Your posts are moderated
Related Questions
1. The level of organization intermediate between unicellular and the multicellular - organisms are composed of multiple cells but these fail to exhibit specialization of those cel

The food components are in the form of solids, in solutions or in the form of colloids - sols or emulsions. The properties of these components determine the quality of food. The

What was the case of Phineas Gage Some Procedures are not used experimentally on humans, but sometimes brain tissue is ablated for medical reasons such as the excision of tumo

S n ake bite Biting by a poisonous snake is manifested by clinical findings of local swelling and nervous symptoms. E t iology: The poisonous snakes have different typ

Q. What are the special structures of the avian digestive tube and their respective functions? The crop has the function of temporary storage of ingested food and it is a more

Q. Explain States of matter Ans. Chemistry deals with the nature and composition of matter - anything that occupies space and has mass, and the changes which it undergoes. Matt

Define Factors influencing  uptake from lumen to intestinal cells? inhibition by intrinsic matrix, inhibition by dietary fiber sources, differential crowding by

Define the control of tear production. Control of Tear Production The lacrimal secretary system was initially thought to be comprised of two parts, basic secretors and r

What is aneuploidy? What are the conditions caused by the aneuploidies? The Aneuploidy is an abnormal number of chromosomes in the cells of an individual. The major aneuploi

Q. Explain about Mandible? In the mandible, attached keratinized tissue normally atrophies with the underlying bone. As a result there is generally a relatively narrow band of