Analytical methods capable of detecting more than one pesticide residue simultaneously (multiresidue methods) become more effective with an increase in the number of chemicals whose behavior through the various steps of the method has been documented. Since 1970, the method behavior data related to the AOAC official method for residues of 25 chlorinated and phosphated pesticides and polychlorinated biphenyls have been extended to include information on twice as many chemicals as was previously available. The value of having a large bank of method behavior data is outlined and the experimental protocol by which the data were collected is described. A complete listing is included of the available data on the analytical behavior of over 300 pesticidal and/or industrial chemicals.

Chemistry Techniques, Analytical↗

PubMed1977

Epidemiology of hepatitis B in two Alaska communities.

In 1973, epidemiologic and serologic data related to hepatitis B infection were collected from the residents of two remote Alaskan Eskimo villages located in an area of high hepatitis incidence. A total of 418 sera were tested by solid-phase radioimmunoassay for heaptitis B surface antigen (HBsAg) and antibody to that antigen (anti-HBs). The overall infection prevalence of 54.8% in the two villages included a 13.9% prevalence of HBsAg and a 40.9% prevalence of anti-HBs. Families containing an individual with HBsAg had significantly higher infection prevalence than those without an antigen carrier. Larger households had higher proportions of infected members than smaller households. The data suggest that efficient transmission of hepatitis B virus occurs within the household setting in these villages by other than classically established parenteral routes.

Adolescent↗

PubMed1972

Utilization of the Westöö procedure for the determination of methyl mercury in fish by gas-liquid chromatography.

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Animals↗

PubMed1971

Collecting and rearing Dermatophagoides farinae Hughes, a mite from housedust.

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Allergens↗

PubMedDate not supplied

Vascular complication of anterior dislocation of shoulder with associated brachial plexus injury--a case report.

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Axillary Artery↗

PubMedDate not supplied

Social psychology in group therapy practice.

This article describes a social psychology approach to group therapy. Using a short case study, the author suggest the options for treatment which are available to the therapist and reasons why treatment based on social psychology offers a unique therapeutic potential.

Dependency, Psychological↗

PubMedDate not supplied