918 resultados para arc- and plasma jet facilities


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"OSHA 3128."

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Published by the Water Supply and Water Pollution Control Program of the division under its earlier name: Division of Sanitary Engineering Services.

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"Department of the Navy. Bureau of Ships. Contract Nonr-220 (12)."

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"Effective July 28, 1980; codified September 28, 1984."

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"Approved and adopted by the Illinois Health Facilities Planning Board"--T.p.

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Illinois Executive Order 2003-10 authorized the consoldiation of facilities management for agencies, offices, divisions, departments, bureaus, boards and commissions directly responsible to the Governor into the Dept. of Central Management Services (CMS). Facilities management functions include the operation and maintenance of state-owned or state-leased facilties.

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Mode of access: Internet.

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Background: Reliability or validity studies are important for the evaluation of measurement error in dietary assessment methods. An approach to validation known as the method of triads uses triangulation techniques to calculate the validity coefficient of a food-frequency questionnaire (FFQ). Objective: To assess the validity of an FFQ estimates of carotenoid and vitamin E intake against serum biomarker measurements and weighed food records (WFRs), by applying the method of triads. Design: The study population was a sub-sample of adult participants in a randomised controlled trial of beta-carotene and sunscreen in the prevention of skin cancer. Dietary intake was assessed by a self-administered FFQ and a WFR. Nonfasting blood samples were collected and plasma analysed for five carotenoids (alpha-carotene, beta-carotene, beta-cryptoxanthin, lutein, lycopene) and vitamin E. Correlation coefficients were calculated between each of the dietary methods and the validity coefficient was calculated using the method of triads. The 95% confidence intervals for the validity coefficients were estimated using bootstrap sampling. Results: The validity coefficients of the FFQ were highest for alpha-carotene (0.85) and lycopene (0.62), followed by beta- carotene (0.55) and total carotenoids (0.55), while the lowest validity coefficient was for lutein (0.19). The method of triads could not be used for b- cryptoxanthin and vitamin E, as one of the three underlying correlations was negative. Conclusions: Results were similar to other studies of validity using biomarkers and the method of triads. For many dietary factors, the upper limit of the validity coefficients was less than 0.5 and therefore only strong relationships between dietary exposure and disease will be detected.