Higher concentrations and longer durations of exposure induce much more rapid and extensive injury.
Optimization studies employed US exposure at various frequencies, mechanical indices, duty cycles, durations of exposure, and exposure time points.
Information about locations and durations of exposure, and sources of exposure can be obtained with these instruments.
At certain levels and durations of exposure, it can cause physical damage to the eardrum and the sensitive hair cells of the inner ear and result in temporary or permanent hearing loss.
Background: The majority of recent, well-designed studies have shown that long-term cigarette smoking increases colorectal cancer risk, but older studies with shorter durations of exposure often found no association.
There is robust evidence to show that CPY is not sufficiently persistent in any environmental compartments to justify durations of exposure associated with chronic toxicity.
Note that the different types of specimens were tested after different durations of exposure, which are also shown in the figures.
Mean durations of exposure to quetiapine XR were 38.5 days (range, 2 to 48) in the add-on lithium group and 36.9 days (range, 1 to 48) in the add-on placebo group; mean durations of exposure to add-on lithium or placebo were 38.6 days (range, 3 to 48) and 37.2 days (range, 2 to 48), respectively.
The CRE ages of the lithic fragments represent integrated durations of exposure on the surface of the Moon and reveal an exposure and a burial history of the regolith samples.
Results showed that cell viability was not compromised under the durations of exposure investigated (Fig. 3A).
We also evaluated the PER after different durations of exposure to the odor (a measurement of the CR).
