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The perfused superior cervical ganglion of the cat has been used to study the effect of lead ions on synaptic transmission and on the relase of acetylcholine from preganglionic nerve endings. Lead ions, in concentrations of 5 to 40 muM./l., caused block of ganglionic transmission, and reduced the output of acetylcholine. Calcium ions (10 mM./l.) relieved(More)
Metallic elements contained in coal, oil and gasoline are mobilized by combustion processes and may be emitted into the atmosphere, mainly as components of submicron particles. The information about the amounts, composition and form of metal compounds is reviewed for some fuels and combustion processes. Since metal compounds are always contained in urban(More)
The composition, environmental fate, and effects of the polybrominated biphenyls (Firemaster BP-6 or FF-1) involved in the accidental contamination of cattle feed in Michigan in 1973 are reviewed. Toxic effects referred to in this report are limited to those occurring in domestic and laboratory animals and include general toxicity, neurobehavioral toxicity,(More)