Results 161 to 170 of about 6,692 (215)

Microdosimetric Basis for Exposure Limits

Health Physics, 1988
Consideration of the energy deposited by ionizing radiation in microscopic volumes has led to new insights into dosimetric concepts at the levels of interest in radiation protection. Large amounts of energy are deposited by the passage of low linear-energy-transfer (LET)-charged particles through small volumes.
L W, Brackenbush, L A, Braby
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Limiting Homologous Blood Exposure

Clinics in Laboratory Medicine, 1992
Successful limitation of homologous blood transfusion may necessitate multiple strategies and advance planning. Preoperative and intraoperative autologous blood collection may have to be supplemented with hemostatic pharmacologic agents. The use of cytokines is increasing.
C M, Leveque, D H, Yawn
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Reassessment of occupational exposure limits

American Journal of Industrial Medicine, 2008
AbstractBackgroundAlthough the Netherlands currently has its own procedure for evaluating chemical compounds and setting occupational exposure limits (OELs), most of these limits were originally adopted in the 1970s from threshold limit values (TLVs) set by the American Conference of Governmental Industrial Hygienists (ACGIH). However, beginning in the
Hans, Stouten, Heidi, Ott, Carolien, Bouwman, Peter, Wardenbach   +3 more
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Misinterpretation and Misuse of Exposure Limits

Applied Occupational and Environmental Hygiene, 2001
Users of occupational exposure limits (OELs) often fail to distinguish between the complementary processes of risk assessment and exposure (risk) management. The former refers to those activities that lead to the selection of a reasonably protective exposure limit and often includes an analysis of exposure databases and an evaluation of group-based ...
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Limitations of the Case-Exposure Study

Epidemiology, 1990
The case-exposure study, described in 1983, is a modification of the case-control study that allows estimation of risk ratios without need for a rare-disease assumption. For a fixed population the approach is the same as the case-base or case-cohort study.
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The concept of occupational exposure limits

Science of The Total Environment, 1991
Germany was the first country to introduce occupational exposure limits (OEL) in 1886. A theoretical consideration for the existence of toxicological thresholds has been provided. Prerequisites for OELs are seen in: reversibility, existence of a threshold, deviation of (physiological) functions from normal to be regarded as "safe", knowledge about ...
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Critical Effects and Exposure Limits

Risk Analysis, 1997
The use of critical effects in the determination of occupational exposure limits (OELs) in Sweden is subjected to a statistical study. Many of the present OELs are high in relation to known noeffect levels and effect levels, and the degree of protection has a surprisingly weak correlation with the seriousness of the adverse effect.
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Occupational exposure limits—at the crossroads

Occupational and Environmental Medicine, 2010
Setting occupational exposure limits (OELs) for hazards in the workplace has been an integral component of worker health protection programs for many decades. These OELs have been established by many authoritative bodies around the world, such as the Threshold Limit Value Committee (TLV) of the American Conference of Governmental Industrial Hygienists (
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Criteria for Hazardous Exposure Limits

Archives of Environmental Health: An International Journal, 1973
Hazardous exposure limits are established in industry to prevent occupational diseases and guard against contribution to the chronic illnesses of aging workers. The cutoff must be fixed to keep responses well below the level of obvious injury to provide a safety reserve that would ensure continuing protection over a full span of life.
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Threshold limit values, permissible exposure limits, and feasibility: The bases for exposure limits in the United States

American Journal of Industrial Medicine, 1993
AbstractThe development of exposure limits in the United States has always relied heavily upon the threshold limit values (TLVs) developed by the American Conference of Governmental Industrial Hygienists (ACGIH). In fact, the TLVs were adopted as official exposure limits by the Occupational Safety and Health Administration (OSHA) in 1972 and 1989 ...
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