Приклади вживання Parts per billion Англійська мовою та їх переклад на Українською
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But state law stillallows lead in drinking water up to 15 parts per billion.
Methane levels reach 0.6 parts per billion during the summer, but that number is only one-third as high during the winter season.
One brand of Organicsweet potatoes tested as having 121 parts per billion.
He confirmed he had been told of the reading of 21 parts per billion but added that the finding was preliminary.
The cities studied sawaverage annual levels of ozone between 10-25 parts per billion.
Watch announcement livestreamhere Methane levels reach 0.6 parts per billion during the summer, but that number is only one-third as high during the winter season.
Uranium is present in the seawater in very low concentrations,3.3 parts per billion.
On Mars, methane production appears to be seasonal in nature,fluctuating from about 0.24 parts per billion(ppb) in the northern hemisphere during winter to about 0.65 ppb during the summer.
The MSM Payload weighs 3.6 Kilograms andis designed to measure methane concentrations in the Martian atmosphere with parts per billion accuracy.
Source of the news, he confirmed that he reported the rate of 21 parts per billion, but added that these are preliminary results.
Using two sets of Earth-based telescopes together with a Mars orbiter, they saw what looked like massive plumes of methane on thesurface of Mars that measured as high as 45 parts per billion.
By comparison, French fries at one fastfood chain ranged from 117 to 313 parts per billion, depending on the location tested.
If the core contains potassium at a concentration of 75 parts per billion, its decay could produce enough heat to melt some of the overlying ice, which is made of a mixture of nitrogen and water.
The normal concentration of squalene in human blood, recognized by scientists,is 250 parts per billion, or 250 nanograms per milliliter.
While the federal limit forbenzene in drinking water is 5 parts per billion(ppb), researchers have found benzene levels as high as 79 ppb in some soft drinks, and of the 100 brands tested, most had at least some detectable level of benzene present.
Food and Drug Administration(FDA)tests of acrylamide levels found they ranged from 175 to 351 parts per billion for 6 brands of coffee tested;
Although parts per billion in general means a relatively small amount, it is quite remarkable for Mars- our measurement corresponds to an average of about 46 tons of methane that was present in the area of 49,000 km2 observed from our orbit.”.
The second important long-lived greenhouse gas methanealso reached record concentrations in 1859 parts per billion by volume, or 257 percent from pre-industrial levels.
Although parts per billion in general means a relatively small amount, it is quite remarkable for Mars- our measurement corresponds to an average of about 46 tonnes of methane that was present in the area of 49 000 square kilometres observed from our orbit,” said Giuranna in a press release.
Food and Drug Administration tests of acrylamidelevels found they ranged from 175 to 351 parts per billion(a measure of concentration for a contaminant) for six brands of coffee tested;
Instruments aboard Curiosity, a Mars rover, which have been sniffing the air for three Martian years(55 Earthly months),reported an average level of 0.41 parts per billion(ppb).
Curiosity reports that methane levels on Mars go up and down in a predictable cycle.Methane levels reach 0.6 parts per billion during the summer, but that number is only one-third as high during the winter season.
Although parts per billion in general means a relatively small amount, it is quite remarkable for Mars- our measurement corresponds to an average of about 46 tonnes of methane that was present in the area of 49,000 square kilometers(about 18,919 miles) observed from our orbit,” Giuranna said.
Advances in the field of analytical chemistry are also thought to be behind chemophobia, as modern techniques arecapable of identifying substances in very low(parts per billion or even trillion) and harmless quantities.
The amount of acceptable ochratoxin is controlled in Europe,with an acceptable level of five parts per billion for ground coffee, and 10 parts per billion for instant, because who cares about instant coffee drinkers anyway?
After the last ice age ended, carbon dioxide and methane levels in the atmosphere should have dropped to about 245 parts per million(ppm)and 445 parts per billion(ppb) without human influence on the planet, He said.
That would dilute down to one part per billion mercury, which is well within what the World Health Organization considers safe.