PubMed Health⌕ Search

Biomedical subjects

K W Nelson

Publications and source records attributed to K W Nelson.

17 recordsLinked to original sources
PubMed2001

Therapist perceptions of ethnicity issues in family therapy: a qualitative inquiry.

A group of 29 leading family therapists presenting at a regional marriage and family therapy conference were interviewed about ethnicity issues in family therapy. Questions and discussion focused on ethnicity in the family therapy process, ethnicity issues for the family therapist, ethnicity issues for the client family, therapeutic strategies when ethnicity is an issue, and recommendations for ethnicity training and supervision of future family therapists. Qualitative methods were used to analyze the transcripts of the recorded interviews to identify themes emerging from the interviews. Results reflect multiple perspectives and approaches in the field of family therapy.

Attitude of Health Personnel↗
PubMed1977

Trace metal contamination of evacuated blood collection tubes.

A study was undertaken to investigate the magnitude of potential trace metal contamination contributed by various commercial evacuated blood tubes to blood samples under experimental conditions. None of the tubes tested contributed significant Cu contamination whereas the 1% nitric acid and human blood leaching data clearly indicate that Zn, Pb and Cd contamination of blood samples can be a significant problem with certain blood collection tubes under normal handling, shipping and storage conditions. The implications of these experimental findings are discussed. It is recommended that several of the evacuated blood tubes be leach tested prior to use with blood or plasma and the eluate analyzed for potential trace metal contamination problems.

Blood Chemical Analysis↗
PubMed1977

Results of trace arsenic analyses performed by various laboratories.

Personal monitor filter cassettes were spiked with a known amount of arsenic and sent to various laboratories in the public and private sectors for analysis. Results and methods of analysis are discussed in light of proposed arsenic standards. Comparison indicates a high degree of analytical precision and accuracy are lacking.

Arsenic↗
PubMed1977

Industrial contributions of arsenic to the environment.

Arsenic is present in all copper, lead, and zinc sulfide ores and is carried along with those metals in the mining, milling and concentrating process. Separation, final concentration and refining of by-product arsenic as the trioxide is achieved at smelters. Arsenic is the essential consistent element of many compounds important and widely used in agriculture and wood preservation. Lesser amounts are used in metal alloys, glass-making, and feed additives. There is no significant recycling. Current levels of arsenic emissions to the atmosphere from smelters and power plants and ambient air concentrations are given as data of greatest environmental interest.

Air Pollutants↗
PubMed1976

Arsenic trioxide absorption and excretion in industry.

1. A study of 24 smelter workers routinely exposed to arsenic trioxide was conducted to evaluate some characteristics of its absorption and excretion. A statistically significant correlation was found between airborne arsenic trioxide concentrations below 300 mug/m3 and urinary arsenic values below 500 mug/liter. These men wore personal monitors for five consecutive work days and were determined to have been exposed to average airborne arsenic concentrations of 53 mug/m3 (70 mug/m3 of arsenic trioxide) which increased their urinary arsenic values from 152 mug/liter to 200 mug/liter (an average gain on 32%). 2. The background average urinary arsenic value for adult males not exposed to arsenic trioxide in industry was determined to be 52.6 mug/liter for 204 men during preemployment examinations. 3. After removal from industrial arsenic trioxide exposure, the rate of fall in urinary arsenic values varies with the magnitude of the urinary arsenic level. An initial decrease of 9.5% per day was measured for workers having urinary arsenic values below 200 mug/liter. The initial decrease is about 21% per day for workers with urinary arsenic values over 600 mug/liter. 4. It was determined that arsenic in seafood can alter, in a dramatic fashion, the urinary arsenic values determined for smelter workers within 24 hours following consumption. It is recommended, therefore, that the absorption of arsenic trioxide due to industrial exposure is best evaluated from urine samples collected at least two days after seafood has been eaten.

Adult↗