Solarization


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solarization

[‚sō·lə·rə′zā·shən]
(graphic arts)
Reversal of a photographic image due to great overexposure.
(physics)
Loss of transparency or coloration of glass exposed to sunlight or ultraviolet radiation.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Solarization

 

in photography, a phenomenon arising when a photographic material undergoes an extreme amount of over-exposure: the greater the exposure, the less the density of the blackening of the material upon development. For the moderate exposures ordinarily used in photography, by contrast, the density increases with the exposure time.

Solarization is a result of the oxidation of latent-image centers by neutral bromine atoms. Under great exposures, these neutral atoms are formed in substantial concentrations within the microcrystals of the photographic emulsion and rise to the surface of the crystals (the rebromination process).

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
References in periodicals archive ?
He said that solarization system had been installed at 35 health units at far-flung areas of Peshawar so far which would help provided relief during power load-shedding hours.
Alternate Energy Development Board (Power Division) would provide technical assistance for solarization, net metering, and similar innovative technical solutions to support the program.
The objective of this study was to verify the use of integrated management control of stem rot disease in Jerusalem artichoke including biological control, chemical control and soil solarization under greenhouse and small plot.
As soil fumigant use becomes more restricted, UC researchers are studying alternative pest supression strategies such as soil solarization, shown here, and anaerobic soil disinfestation.
Solarization became a main topic in place of soil steaming and soil fumigation.
The solarized CC performance was then evaluated in terms of power production penalty, fossil fuel saving and solar fraction due to solarization (Figure 3--typical Summer day).
Regarding the results of Spearman test in table (1), there was a significant correlation of 99% between solarization, the use of acid and lime for controlling the acidity of soil, and continuous but time-limited irrigations for controlling the root diseases in one hand and the function of greenhouse in the other hand.
Soil solarization, a hydrothermal method of managing nematodes, diseases, insects, and weeds, is accomplished by passive heating of moist soil covered with transparent plastic sheeting (McGovern & McSorley 1997).
In this perspect, seed treatment with hot water, solar heat, polythene solarization and brine solution could be use to control seed borne fungal pathogens.
They introduce a dozen chapters by international scientists reviewing principles and findings on the latest preventive and treatment strategies including cultural practices such as crop rotation, and allelopathy (the use of cover crops that suppress weeds); other biological controls; non-living mulches; mechanical control; thermal control; and soil solarization. Distributed by Oxford U.