Abstract
AbstractThe effect of different alcohols acting as contrast-promoting agents on the photographic characteristics of silver halide emulsion containing N’-acyl-N-phenylhydrazine has been studied. The results reveal that the phenyl or phenyl-derivative free radical, formed in the process of infectious development, is the main cause which produces the feedback inhibition effect. A mechanism for the alcohol’s action is proposed on the basis of analyzing the reaction intermediates and products by mean of ESR and GC coupled mass spectrometry.
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