9783540059509

Microautoradiography and Electron Probe Analysis

Format: Paperback

ISBN13: 9783540059509

Paperback|9783540059509


Overview

In biological literature, several definitions of quantitative autoradio­ graphy are given. The term is defined as either the determination and com­ parison of the density of silver grains above various structures or under varying conditions, or the determination of absolute quantities of radio­ activity. In both these cases, photometric measurement serves for more rapid and more exact evaluation of grain densities than would be possible by visual counting of the grains. The equipment generally used for the photometric measurement of silver grains consists of a microscope, a photocell, an electronic amplifier system and a display unit. Grains can be made accessible to photometric evaluation by various kinds of microscopic illumination: 1. Substage bright-field illumination. 2. Substage dark-field illumination. 3. Incident dark-field illumination. 4. Vertical bright-field illumination. With all these types of illumination, the relationship between the luminous flux I absorbed by the film, scattered into the objective and reflected or diffracted, and the flux 10 which is not affected by the film is used as a measure of grain density. Since these are differential measurements, the light beam I transmitted by the film is in itself a measure of grain density if the luminous flux 10 incident on the grains is kept constant. This approach has been used in a large number of measuring setups.

ISBN-13

9783540059509

ISBN-10

3540059504

Weight

0.79 Pounds

Dimensions

6.10 x 0.57 x 9.25 In

List Price

$109.99

Edition

1st Edition

Format

Paperback

Language

English

Pages

iv, 242 pages

Publisher

Springer

Published On

1972-12-28



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