The experiment revealed acute exposure
led to net dissolution, meaning calcified organisms such as the coralline algae and starfish were dissolving.
The mitotic index (MI) observed after acute exposure
was time and dose-dependent.
For the study, the researchers exposed a small intestinal cell culture model to the physiological equivalent of a meal's worth of titanium oxide nanoparticles - 30 nanometers across - over four hours (acute exposure
), or three meal's worth over five days.
The similarity of control (group 1) and group 2 (acute exposure
) was about 61% and 71%, respectively, compared to group 3 and 4.
Among the fish organs, liver and kidney showed significantly higher ability to amass Cd during acute exposure
Synthetic cannabinoids are two to 100 times more potent than A9-tetrahydrocannabinol, the active ingredient in cannabis; acute exposure
is associated with a range of mild to severe neuropsychiatric, cardiovascular, renal, and other effects.
There's a lot of evidence that acute exposure
particularly to aflatoxins -- these fungal toxins -- but also prussic acid, can be lethal.
point out that urine or blood mercury levels may reflect acute exposure
in some people, but the measurements cannot show mercury levels stored in organs and tissue.
HEALTH HAZARDS The most significant health effects of air pollution have been associated with particulate matter Acute exposure
to NO2 causes respiratory irritation and leads to pulmonary oedema, pneumonitis and bronchitis.
Symptoms of acute exposure
range from headaches to difficulty breathing to skin irritation.
laboratory studies were conducted to assess fertilization success, development, survival, and swimming behavior, and sublethal exposure laboratory experiments were conducted to assess the impact of brief exposures on growth and survival.
Chronic exposure to ethanol in embryonic stages significantly (P<0.05) increses plasma concentration of triglyceride in newborn hatching chick; but acute exposure
to ethanol in embryonic stages had no effect on plasma concentration of triglyceride (figure 2).
The consequences of overexposure may be acute after a latent period, sequelae to an acute exposure
, or long-term chronic effects.
Increases in force, power output, and RFD have previously been reported following acute exposure
to WBV [16-20,25] and these increases may be related to better maintenance of dynamic balance among older adults.