Sentences with phrase «cubic meter of air»

The team found 0.5 million to 2.5 million bacterial cells per cubic meter of air, which is about what they expected.

As few as 10 grains per cubic meter of air can provoke symptoms in the most sensitive people; during late summer months the count can reach into the hundreds.

The team found that for each increase of 10 micrograms per cubic meter of air pollution (the equivalent of the difference in air quality between a city like Los Angeles, CA and a city like St. Louis, MO), a woman's risk of cardiovascular disease increased by 44 percent if she had type 2 diabetes.

In the end, each increase of 10 micrograms of fine particulates per cubic meter of air increased the risk of any cardiovascular health event by 24 percent and the risk of dying from heart attack or stroke by 76 percent.

Most concerning was the finding that, although the current National Ambient Air Quality Standards declare that 12 micrograms per cubic meter of fine, inhalable particles (those with an aerodynamic diameter of 2.5 micrometers or less, or «PM2.5») is an acceptable level, there was a 13.6 % increase in the risk of death for every increase in 10 micrograms of fine particles per cubic meter of air below that «acceptable» threshold.

The density of PM10 reached 560 micrograms per cubic meter of air on January 10, said the Beijing Environment Protection Bureau.

When PM 2.5 levels go above roughly 35 micrograms per cubic meter of air, it can become a major health problem.

It can clean more than 30,000 cubic meters of air per hour and uses no more electricity than a water boiler, according to Roosegaarde.

Each of the tiny stones is the equivalent of 1,000 cubic meters of air.

We had a huge chamber, with about eight cubic meters of air, and the whole idea was to have air that is as clean as you have over the Pacific, and then of course, to be able to control what's in the chamber.

The present rules generally advise limiting exposure to roughly 100 micrograms of crystalline silica per cubic meter of air, averaged over 8 hours.

Across the two countries, researchers found that the total number of stroke cases rose 1.19 percent for each 10 micrograms per cubic meter of air (µg / m3) increase of PM2.5.

The deposited particle mass from 10 to 350 nanograms (a billionth of a gram) per square centimeter of cell surface corresponds to an airway daily dose of slightly polluted, rural air with 20 micrograms (a millionth of a gram) PM per cubic meter of air through to very high air pollution in a megacity (1000 micrograms PM per cubic meter of air).

During a pilot study in 2009, Fernández found one shop in Huepetuhe where mercury averaged 450 micrograms per cubic meter of air — 22 times higher than the World Health Organization's occupational health standard — with spikes as high as 1,000.

For every 10 micrograms per cubic meter of air (ug / m3) increase in indoor coarse particle concentration, there was a 6 percent increase in the number of days of cough, wheeze, or chest tightness, after adjusting for a number of factors.

The study results showed that for every additional unit of pollution per cubic meter of air that people inhaled in 1971, the risk of death between 2002 and 2009 increased by 2 percent.

Scientists specify the concentration of individual gases in the atmosphere as volume fractions (rather than, e.g., grams per cubic meter of air) because then the numbers do not depend on temperature and pressure, which vary greatly in the atmosphere.

Every cubic meter of air and water and every hectare of land now have a human imprint, from hormones in the seas, to fluorocarbons in the atmosphere and radioactivity from nuclear weapons tests in the soil.

The new rule would set the maximum allowable standard for soot in a range of 12 to 13 micrograms per cubic meter of air.

In Canada the federal government has recommended that the Canadian acceptable level for radon should be 800 becquerels per cubic meter of air (800 Bq / m3).