RESUMO
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.
Assuntos
Fenômenos Eletromagnéticos , Exposição Ambiental , Magnetismo , Envelhecimento/efeitos da radiação , Animais , Apetite/efeitos da radiação , Comportamento Animal/efeitos da radiação , Encéfalo/efeitos da radiação , Anormalidades Congênitas/etiologia , Eletrólitos/urina , Campos Eletromagnéticos , Fenômenos Eletromagnéticos/efeitos adversos , Fenômenos Eletromagnéticos/uso terapêutico , Embrião não Mamífero/efeitos da radiação , Feminino , Feto/efeitos da radiação , Haplorrinos , Coração/efeitos da radiação , Sistema Hematopoético/efeitos da radiação , Humanos , Camundongos , Neoplasias Experimentais/terapia , Gravidez , Coelhos , RatosRESUMO
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.
Assuntos
Venenos , Computadores , Dose Letal Mediana , Organização e Administração , PesquisaRESUMO
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.