Results 151 to 160 of about 97,001 (208)
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Environmental Science & Technology, 1984
Polychlorinated biphenyls have been shown to be environmentally persistent and bioaccumulative. Few, if any, data have been able to link them directly to serious human health effects. Some scientists believe that the problem arises when PCBs are heated in the presence of oxygen, therby enhancing toxicant formation.
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Polychlorinated biphenyls have been shown to be environmentally persistent and bioaccumulative. Few, if any, data have been able to link them directly to serious human health effects. Some scientists believe that the problem arises when PCBs are heated in the presence of oxygen, therby enhancing toxicant formation.
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New England Journal of Medicine, 1977
An increased incidence of malignant melanoma was noted among petrochemical workers exposed to PCB. The study is criticized for failure to address the issue of exposure to epoxides and other carcinogenic chemicals. It is emphasized that information on other chemicals to which the group may have been exposed is essential. (HLW)
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An increased incidence of malignant melanoma was noted among petrochemical workers exposed to PCB. The study is criticized for failure to address the issue of exposure to epoxides and other carcinogenic chemicals. It is emphasized that information on other chemicals to which the group may have been exposed is essential. (HLW)
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Assembly Automation, 1995
Discusses the manufacturing technology associated with the assembly of printed circuit boards [PCBs] covering photolithography, etching, manual assembly of PCBs and the soldering methods involved. Describes how all the stages of PCB assembly can be automated and also looks at how the boards are cleaned and tested. Concludes that many factors need to be
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Discusses the manufacturing technology associated with the assembly of printed circuit boards [PCBs] covering photolithography, etching, manual assembly of PCBs and the soldering methods involved. Describes how all the stages of PCB assembly can be automated and also looks at how the boards are cleaned and tested. Concludes that many factors need to be
openaire +1 more source