Threshold

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Threshold

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(1) It is not clear whether there is a minimal threshold dose at conception, although it is clear that the developing embryo is extremely radiosensitive during the preimplantation phase (days 0 to 8).
As adapted to the asbestos context, the reasoning runs something like this: Suppose we know that it takes a threshold dose of 100 units of asbestos exposure for an individual to develop some specific asbestotic disease.
To obtain a better understanding of the surfactant adsorption, both the untreated photoresist film and photoresist layers processed with the threshold dose, baked and developed (in the following simply named "exposed resist") were characterized by various methods.
One of the reasons why this has remained secret for so many years is because it is a threshold dose. You might be taking 10 to 20 grams of vitamin C for a cold and think that was an enormous dose.
In this patient, the threshold dose of L-DOPA for clinical effect is 125 mg.
In comparison with stochastic effects, deterministic effects are a lesser cause of concern in diagnostic radiology as they occur above a certain threshold dose, which is relatively high and can be avoided by having astute radiologists who monitor changes in the patient's skin during the examination and change the X-ray beam projections.
They may or may not occur, after a long delay, at a rate nearly imperceptible above baseline, with or without a threshold dose. It is impossible to speak definitively about these risks--an uncertainty that has hampered efforts at risk reduction.
We found that the coefficient of variation (CV) of the suprathreshold dose is smaller than the threshold dose significantly (Table 1).
On the positive side, in 3 of the 13 studies that also looked at the close-dependent effects of valproic acid, the threshold dose to cause malformations was about 1,000 mg/day, which has been reported over the past few years.
A threshold dose of light is necessary for tumor eradication.
The threshold dose is that dose below which no measurable effects are observed, and it is an important consideration, as any dose below it will produce no effects even after a lifetime of exposure.