Nitrites commonly occur in food and drinking water as additives, contaminants, or products of biological processes. These highly reactive substances combine with other commonly ingested substances to form potent carcinogens. Controls are needed on levels of nitrites and reactive contaminants in food and drinking water. (RE)

It is suggested that a system of relative standards be formulated which would compare utility of substances to their relative risk as carcinogens. This would define a range of use restrictions. Substances intended for specific uses would then be regulated according to these standards. (Author/RE)

Callus induction from species of Haworthia can be done quickly in the laboratory with minimal equipment to study tissue dedifferentiation and cellular redifferentiation. It is shown that the cultured cell can also be used to study and evaluate the effects of various mutagens, carcinogens, and pesticides in controlled environments. (Author/MA)

Cancer mortality in U.S. blacks has greatly increased since 1950. This greater increase for blacks was found in 28 of the 56 most frequent cancers. Greater exposure to environmental carcinogens appears to be the main cause. This author recommends a thorough epidemiologic study of the rise in black cancer deaths. (Author/GC)

Those attending the CIC/ACS (Chemical Institute of Canada /American Chemical Society) joint conference at Montreal heard about recent advances in brain chemistry research, the use of compartmental models for predicting pollution, the presence of carcinogens (N-Nitrosamines) in sidestream tobacco smoke, and the synthesis of sex attractants using…

Describes safety/health program activities at Research Triangle Institute (North Carolina). These include: radioisotope/radiation and hazardous chemical/carcinogen use, training, monitoring, disposal; chemical waste management; air monitoring and analysis; medical program; fire safety/training, including emergency planning; Occupational Safety and…

Investigated a possible cancer cluster among employees at one elementary school. Results of an industrial hygiene survey and health investigation found a marginally significant increase of risk for breast cancer among females who had worked for the school but no other excess in cancers. There were no significant employee exposures to carcinogens…

A modified version "Tobacco Induced Mutations" of Ames assay experiment provides a meaningful context for students to learn about the concept of mutations by using a known carcinogen that is tobacco. This experiment shows toxicological concept of the dose/response relationship and visually demonstrates when a mutation have occurred in bacteria…

Worldwide, approximately 2 billion people are chronically infected with "Toxoplasma gondii" with largely yet unknown consequences. Patients with autism spectrum disorders (ASD) similarly as mice with chronic toxoplasmosis have persistent neuroinflammation, hypercytokinemia with hypermetabolism associated with enhanced lipid peroxidation, and…

This 10-chapter handbook (designed for science teachers and school administrators) describes known hazards associated with science teaching and provides information to develop a framework for local safety programs specifically designed to avoid or neutralize the effects of such hazards. Major areas addressed in the chapters include: (1) the nature…

General and specific safety procedures and recommendations for secondary school science laboratories are provided in this guide. Areas of concern include: (1) chemicals (storage, disposal, toxicity, unstable and incompatible chemicals); (2) microorganisms; (3) plants; (4) animals; (5) electricity; (6) lasers; (7) rockets; (8) eye safety and…

This report deals with the less ubiquitous, but potentially harmful, contaminants that are in our atmosphere. Thirty such pollutants have been identified and available information has been summarized in a series of reports describing their sources, distribution, effects, and control technology for their abatement. A total of 27 reports have been…

This manual is intended for use in presenting a course which provides the content-specific general chemistry education required for the safety awareness and job enhancement of persons employed as waste handlers. The course, which was designed to be delivered to technicians at job sites in a lecture/demonstration format with several hands-on…

After the Food and Drug Administration announced the results of testing of saccharin as a possible carcinogen and ruled that it should be banned, a public outcry brought about a delay in the ban. A study of magazine coverage of the reasons for the ban and information about the testing showed that in eleven mass circulation magazines, the reporting…

This document is an annotated compilation of citations to materials on occupational carcinogens, as well as on agencies and data bases dealing with the topic, which are available for use in public, worker, and professional education programs. The bibliography is intended to assist health educators, industrial hygienists, and health care providers…