Sentences with phrase «crushed under vacuum»
The main problem in deep ice cores is the formation of clathrates, where CO2 (and N2 or O2) can hide, even if crushed under vacuum.
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In Grenoble, on every depth level one to three samples of about 40 g of ice are crushed under vacuum conditions.
At closing depth, direct in - situ measurements of CO2 in firn, thus of still open bubbles, and from ice, thus already fully closed bubbles, via the normal route of drilling ice, transport, crushing under vacuum, measuring the levels, both show the same CO2 levels.
Not exact matches
A metamaterial fine - tuned to stay the same size under a wide range of pressures could be used to build equipment that withstands the crushing pressures of the deep sea or the vacuum of outer space.
The samples are crushed by a cooled needle cracker under vacuum conditions.