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Biomedical subjects
Publications and source records attributed to N E Bolton.
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The biological effects of the interaction of stationary magnetic fields (SMF) with man and other animals have been reviewed. The lowest detectable limit of interaction between higher animals and a SMF is 80 to 100 G. The recommended limit on an extended-period basis for whole-body or head exposure is 200 G. Higher limits of magnetic-field exposure for limited periods of time are contained within this report.
For large industrial and research operations, maintaining reasonable control of all toxic materials used in their operations can be a formidable task. A system utilizing cards has been developed which serves a dual purpose - informing the user regarding hazards of a particular material and also facilitating appropriate workplace surveillance during its use. Selected data is printed on the card. The card contains a label which the user detaches and affixes to the container. This label classifies the material according to flammability, toxicity, reactivity and special properties on a 0 through 4 hazard rating system.
A technique utilizing coliphage as the test material has been developed and employed to evaluate the effectiveness of a containment system for zonal centrifugation of hepatits viruses. An Andersen Viable Particle Sampler which had been loaded with plates containing a base layer of agar nutrient with an overlay of E. coli- agar suspension was used to sample the test air. The containment system, which includes a HEPA filter, was challenged with an aerosolized suspension of coliphage.
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