deterministic effect


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deterministic effect

(dē-tĕr″mĭ-nis′tik)
An effect that has a threshold of chemical or radiation exposure below which are no measurable effects and above which the severity is dose-related.
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The threshold dose for a specific deterministic effect depends on the type of radiation, on the dose-rate pattern over time (i.
Deterministic effects are those radiobiological effects that increase in severity as the radiation dose increases and for which a dose threshold exists.
Examples of deterministic effects are hypothyroidism arising from large radiation doses to the thyroid gland, as can occur after ingesting large amounts of radioiodine (not a present concern in Japan); skin burns arising from radioactive media (e.
The cumulative normalized dose is indicated by X, and for a given absorbed radiation dose differs for different deterministic effects.
From personal dosimetry and a standard hazard-function model, risk of deterministic effects of ionizing radiation on exposed recovery workers can be calculated.
Ionising radiation has either stochastic or deterministic effects on the exposed individual.
They cover basic radiation physics, chemistry and biology, sources of possible radiation exposure, effects on genetic materials, cancer induction and dose-responsive models, carginogenesis of specific sites, deterministic effects of radiation and effects in combination with other agents, exposure in utero, psychological perceptions about radiation, hormesis, effects on individuals, and comparisons of uranium, plutonium, and radium.
A tentative finding is that deterministic effects are relatively more important than stochastic ones.
Moreover, in terms of relative explanatory power, deterministic effects are more important than stochastic ones in both series.
Historically, the first permissible dose proposed was linked to deterministic effects of ionizing radiation.
Lewis suggests a view of development that minimalizes the potential for lasting, deterministic effects of a child's early experiences without careful consideration of the context - individual, interpersonal, institutional, and cultural - of the child at later ages.
In comparison with stochastic effects, deterministic effects are a greater cause of concern in diagnostic radiology as they occur above a certain threshold dose.
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