Physical factors affecting maximum precipitation of the BSA-AntiBSA fowl system.

Studies were made ascertaining the effects of temperature and length of incubation period on the amount of precipitate formed in the BSA-antiBSA fowl serum system. The specific factors considered were centrifugal temperature, temperature of incubation and length of incubation. Reactions were analysed for the entire precipitin curve, using doubling dilutions of antigen, and also for the region of equivalence using intervals of 1 μg.

Evaluation of the health hazards involved in house-spraying with DDT.

The dermal and respiratory exposure of workers during house-spraying operations has been measured to find out the main factors affecting the exposure, and to develop effective, acceptable protective measures and clothing. Dermal exposure was found to be much greater than respiratory exposure. The major factors affecting exposure with a single concentration of formulation appeared to be spray-pump pressure, height of area being sprayed, and absorbency of surface.