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Chelating agents
Oxalates: Only a few plants contain sufficient amounts of sodium and potassium oxalate to be considered toxic. Moreover, ruminants that consume these plants develop increasing amounts of tolerance to oxalate. An oxalate degrading anaerobe microorganism has been isolated from pure culture of rumen bacteria. This organism, Oxalobacter formigens, uses oxalate as a sole energy source and produces carbon dioxide and formate as end products. Studies in animals and human volunteers have indicated that, when administered therapeutically, O. formigenes can establish in the gut and reduce the urinary oxalate concentration following an oxalate load, hence reducing the likely incidence of calcium oxalate kidney stone formation. The findings to date suggest that anaerobic, colonic bacteria such as O. formigenes, that are able to degrade toxic compounds in the gut, may, in future, find application for therapeutic use, with substantial benefit for human health and well-being.
Nitrates: Forage plants and water are common sources of high levels of nitrates.Some of the causes of abnormal accumulation of nitrates in plants are: nitrogen fertilizaton, drought conditions and some herbicidal treatments. Although in the rumen nitrate is readily reduced to nitrite and then to ammonia, the consumption of plant materials with high levels of nitrate might lead to an acute intoxication. Nitrate reduction in the rumen competes with other essential metabolic reactions such as mathanogenesis, end-product formation, and microbial protein synthesis, and its toxicity reduces growth, causes Vitamin A deficiency, abortion, infertility, and goiter.
Consider Neuron B in the frog central nervous system whose plasma membrane has a previously unknown channel that is selectively conductive to a newly discovered tetravalent anion n
Darwin put fort the notion of the survival of the fittest. How do we define 'fittest'? The answer usually given is those who survive. So you can readily see that this is a circular
Chromatin is made of DNA molecules associated to proteins known as histones.
Determine the term - Leuconoid sponge. The most complex of the three different sponge architectures. Choanocytes are found in chambers, and there is not any spongocoel. Water e
DNA and RNA are polymers composed of repeated units called?
Molecular Hydrogen N 2 -fixing organisms also produce a membrane bound enzyme called uptake-hydrogenase under N 2 -fixing condition. The physiological significance of the pres
Post-parturient haemoglobinuria (pph) in cattle and buffaloes The post-parturient haemoglobinuria (PPH) is an acute disease of high yielding buffaloes and cows. The disease oc
Humans have selectively bred many radically different domestic animals(e.g., St. Bernard and Chihuahua dog breeds). Does this activity result in evolution? why or why not?
EGG S OF FROG This egg is round & its diameter is of 1-2 mm. It is mesolecithal & has distinct animal pole & vegital pole. The nucleus is found in the centre of the anim
Ecological taxonomy notes
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