143,168 research outputs found
Particulate emissions from energy systems
General models of aerosol dynamics, originally developed to
simulate atmospheric aerosol behavior, have been extended for
application to combustion and other high temperature processes.
These models are now being used to study the fate of ash vapors
in conventional pulverized-coal combustion. Field measurements
have shown that the vapors condense preferentially on the surfaces
of the smaller ash particles. Previous simplified calculations have
suggested that large numbers of very small particles may also be
formed by the condensation of these vapors. The new, exact calculations
will be used to explore the relative importance of new particle
formation and condensation on existing particles, the size distributions
of the particles produced under various combustion conditions,
and the distribution of chemical composition with respect to particle
size
The Insects. Peter Farb and the editors of Life. New York: Time Inc., 1962. 192 pp. $4.00.
Excerpt: It is a pleasant surprise to find a book that can effectively communicate much information about insects to the lay public, amateur entomologist, and professional entomologist alike. In straight-forward language the author gives genuine insight into the morphology, physiology, behavior, evolution, and adaptation of insects. These areas are not treated as unrelated topics but are skillfully blended into a meaningful whole. The text is supported liberally with pertinent facts, clear drawings, and many photographs of remarkable quality. The lack of obvious mistakes indicates that editing has been carried out carefully
The New Genesis: Theology and the Genetic Revolution
Reviewed Book: Cole-Turner, Ronald. The New Genesis: Theology and the Genetic Revolution. Louisville, Ky: Westminster/John Knox Press, 1993
Food Plants of Some Adult Sphinx Moths (Lepidoptera: Sphingidae)
Excerpt: While food plants of many species of sphinx moth larvae are well known, food plants of the adults are not. Many observations of the feeding habits of adult sphinx moths undoubtedly have been made, but much of the information is probably resting in the field notebooks and memories of the observers.
To my knowledge no summary of known feeding information has been presented previously for American Sphingidae. A rather thorough list of food plants for adult European sphinx moths has been published by Wahlgren (1941). This list also includes other moth families as well and it can be a useful reference for many workers
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