Read e-book online A Guide to Practical Toxicology: Evaluation, Prediction, and PDF

By Woolley Adam

ISBN-10: 1420043145

ISBN-13: 9781420043143

This functional, straight forward, and informative textual content surveys easy ideas of toxicology. it really is a useful consultant to comparing toxicity and similar information, drawing close toxicity checking out and interpretation, and knowing the ideas of danger prediction and chance overview and administration.

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Extra resources for A Guide to Practical Toxicology: Evaluation, Prediction, and Risk

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Other examples are more complex; is it necessary to investigate the acute toxicity of a household cleaner if it is thought that it may be ingested accidentally by children or purposefully by adults? In the case of natural constituents of a traditional food, for example, mushrooms, is it ethical to investigate the toxicity of individual components? Possibly, especially if there has been evidence gathered from humans that there is a problem for which it is considered that the food or its constituent is responsible.

A successful example of this approach is the replacement of rabbits in pyrogen testing. Pyrogens, sterilization-resistant components of bacteria which may be of importance, especially in parenteral solutions, may be detected in batches of finished product by injection into the ear veins of rabbits and monitoring the temperature response. This test is costly in terms of labour and animals and is also subject to interference by the presence of pharmaceuticals in some preparations; in addition, it does not give a measure of the amount (only the potency) of pyrogenic substances present.

GSH, which may be present in the liver at a concentration of up to 5 mM, is a good example of this. Enzymes such as superoxide dismutase, which catalyzes the conversion of superoxide to hydrogen peroxide, are also important in protection of the cell. There are also differences between tissues in the activity of DNArepair mechanisms. For example, the brain is less able than the liver to excise the DNA base guanine methylated at the O6 position, making it more susceptible to tumor formation following administration of dimethylnitrosamine.

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A Guide to Practical Toxicology: Evaluation, Prediction, and Risk by Woolley Adam

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