摘要：The authors describe some experiments carried out to determine the effect of moisture, temperature, and pressure on the suspensibility of DDT water-dispersible powders. It was found that the removal of moisture brought about a slight increase in suspensibility; that heating for one hour at temperatures below 70°C resulted in an increase in suspensibility, due probably to the drying effect of the heat, whereas heating for the same period at temperatures above 70°C resulted in a decrease; that on prolonged heating at 70°C and 75°C the suspensibility decreased sharply in the first four hours but thereafter showed little change up to 20 hours; and, finally, that low pressures—for example, 25 g per cm2—had little effect on the suspensibility, but that at pressures of 100 pounds per square inch (7 atm.) and over, it varied in inverse proportion to the logarithm of the pressure. Full text Full text is available as a scanned copy of the original print version. Get a printable copy (PDF file) of the complete article (727K), or click on a page image below to browse page by page. 937 938 939 940 941 942 943 944 945
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