By Chartered Institute of Building Services Engineers
ISBN-10: 0900953918
ISBN-13: 9780900953910
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Additional resources for Minimising Pollution at Air Intakes
Example text
In the determination of plant contamination, herbivorous animals are especially useful as sentinels. If a particular species or type of plant (for example, shrubs or trees) is of interest, an animal for which that plant constitutes a major portion of the diet should be selected. If all plants in a given area are of equal interest, an animal with broad and varied eating habits should be used. For example, deer are primarily browsers and prefer to eat woody plants, whereas sheep are primarily grazers and prefer to eat grasses; generalists, such as rabbits and goats, eat both.
Once an animal (or a human) has been exposed to a toxic chemical, a series or set of biologic events often can be detected. If an animal is to function as a sentinel, biologic responses must be observed soon after exposure. Therefore, changes in ordinarily measured biologic characteristics, such as the hematologic profile and serum chemical values, probably are more generally useful end points than are reproductive characteristics, mutagenesis, teratogenesis, or neoplasia. Structural changes generally are easier to measure than functional changes, but both can provide important information after exposure.
Page breaks are true to the original; line lengths, word breaks, heading styles, and other typesetting-specific formatting, however, cannot be retained, and some typographic errors may have been accidentally inserted. Please use the print version of this publication as the authoritative version for attribution. CONCEPTS AND DEFINITIONS 40 counts require accurate inventories of household pets. The Tufts Center for Animals and Public Policy recently has undertaken surveys of pet ownership in New England to determine who owns pets, the types of pets owned, and the pet population.
Minimising Pollution at Air Intakes by Chartered Institute of Building Services Engineers
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