Sentences with phrase «hydrogen sulfide concentrations»

Aqueous hydrogen sulfide concentrations observed in both closed and open states were significantly higher than the recommended thresholds for aquatic life.

The most dramatic effects were a nearly 2 mmHg rise in diastolic (the low number) blood pressure when the odor was rated an 8 compared with no odor, and a nearly 3 mmHg rise in systolic (the high number) blood pressure when hydrogen sulfide concentrations reached 10 parts per billion compared with no detectable level, the researchers reported last week in Environmental Health Perspectives.

Stronger odors and higher measured hydrogen sulfide concentrations both correlated to higher blood pressure in the residents, the researchers found.

Not exact matches

Researchers had long suspected that Uranus's atmosphere was laced with hydrogen sulfide, and in concentrations dozens of times higher than at Saturn or Jupiter.

Thus, in order to successfully produce the main types of «the energy currency» under a high concentration of hydrogen sulfide, the intestinal microflora inhabitants should use a unique type of terminal oxidases, which is missing in the cells of humans and animals,» says Vitaly Borisov.

Using mobile monitoring equipment, the researchers measured the air quality, including particulate matter concentration and hydrogen sulfide, of neighborhoods adjacent to hog CAFOs in North Carolina.

Ultimately, he found that, while volcanic eruptions would have spewed huge quantities of both sulfur dioxide and hydrogen sulfide into the atmosphere, it was the former that dissolved more easily in shallow waters, producing large concentrations of sulfidic anions, in the form of sulfites and bisulfites.

Girguis also rigged up filters to adjust the concentrations of hydrogen sulfide, nitrate, oxygen, and carbon dioxide in the cylinders to match the worms» natural environment.

High concentrations of hydrogen sulfide are toxic, but recent studies have shown that smaller quantities play an important role in the body.

We showed that the transition from closed to open state leads to significant decreases in aqueous pH to circumneutral values and significant increases in aqueous hydrogen sulfide and iron concentrations to 10.6 μM and 59.1 μM, respectively, due to sediment AVS oxidation following sediment resuspension.

there was a strong association between the problem drywall, the hydrogen sulfide levels in homes with that drywall, and corrosion in those homes; (2) while hydrogen sulfide and formaldehyde concentrations were associated with corrosion, hydrogen sulfide was an essential component.