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Biomedical subjects

M Bolyard

Publications and source records attributed to M Bolyard.

4 recordsLinked to original sources

Keeping it together: stigma, response, and perception of risk in relationships between drug injectors and crack smokers, and other community residents.

Sexual relations between drug injectors (IDUs) and crack smokers (CS), and non-drug users are a major means of HIV spread to the broader population. However there is little literature describing community processes that regulate sexual and social partnerships among these groups. We describe these relationships in Bushwick, a low-income, mainly Latino neighbourhood in Brooklyn, NY. In this community, IDU and CS are heavily stigmatized, both by non-users and by some users. Known IDU/CS may find it harder to start and maintain social and sexual relationships, and to get jobs or support. Partially as a result of this stigma, IDU/CS attempt to 'keep it together' and hide either their drug use or its extent from other residents. Nevertheless, other residents believe, sometimes falsely, that they can distinguish users from nonusers. We describe some potential negative consequences of these beliefs and interactions, including their effects on risk for HIV and other sexually transmitted diseases.

Adolescent↗

Analysis of oxyhalide disinfection by-products and other anions of interest in drinking water by ion chromatography.

The US Environmental Protection Agency is developing regulations for various drinking water disinfection by-products (DBPs). This effort involves developing analytical methods for the DBPs formed as a result of different disinfection treatments and collecting occurrence data for these species. Ion chromatography is one method being used to analyze drinking water samples for the following inorganic DBPs: chlorite, chlorate and bromate. These anions, however, are difficult to separate from common interfering anions of chloride, carbonate and nitrate. A method is therefore presented by which tetraborate/boric acid is used to separate these anions. Method detection limits of the order of 10 micrograms/l, using conductivity and UV detection were obtained. Stability studies of chlorite showing the effectiveness of ethylenediamine as a preservative and summary data for an occurrence of nitrite, nitrate and the DBP precursor bromide are presented.

Anions↗

Fourier transform infra-red spectroscopy applied to hazardous waste: I--Preliminary test of material analysis for improvement of personal protection strategies.

Many chemicals, when mixed, can produce potentially hazardous effects which are harmful to human health and to the environment such as heat, pressure, fire, explosion, violent reaction, and toxic dusts, mists, fumes, and/or gases. Waste chemicals handled on a remedial action site are analyzed by simple chemical methods for compatibility. Because it is difficult to base worker and community protection programs on this limited knowledge of material content, extreme precautions must be taken to ensure safety to all working on or living near hazardous waste remedial action sites. The approach used in this study involved the application of Fourier transform infra-red spectroscopy (FTIR) to the analysis of samples taken from the Chem-Dyne remedial action hazardous waste site. The data generated are compared to the results obtained using compatibility and GC-MS analysis procedures. Illustrations are given of improved personal protection strategies, based on drum material composition obtainable by FTIR. The requirements for further testing are defined.

Environmental Exposure↗