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Updated: May 1, 2025
But the plant must have the carbon dioxide and can get it only from the air, so it is constantly withdrawing this harmful substance from the air and converting it into plant tissue. It consumes only part of the carbon dioxide, however, for the oxygen that is tied up in the carbon dioxide is set free and given back to the air, only the carbon being retained.
When coal gas is burned, the hydrogen is supposed to be entirely converted into water vapor, and the carbon to finally escape into the air as carbon dioxide; and if this were so, every cubic foot of gas consumed would produce approximately 0.52 cubic foot of carbon dioxide and 1.34 cubic feet of water vapor, while the illuminating power yielded by the cubic foot of gas will, of course, vary with the kind of burner used.
By this arrangement the air within the alveoli is brought very near a large surface of blood, and the exchange of gases between the air and the blood is made possible. It is at the alveoli that the oxygen passes from the air into the blood, and the carbon dioxide passes from the blood into the air. At no place in the lungs, however, do the air and the blood come in direct contact.
Sometimes yeast finds its way into milk and causes decomposition of the sugar with the formation of carbon dioxide and alcohol. A count of the bacteria in milk often serves a good purpose, for it shows whether it is good and has had proper care. The consumers have a right to demand milk low in bacteria, for if no preservatives have been used, that means clean milk.
Manning, division superintendent, and the Honourable Orrin Young, railroad commissioner and candidate for reappointment all are embracing the opportunity to greet humble friends or to make new acquaintances. Another hour and a quarter, with the temperature steadily rising and the carbon dioxide increasing and the second ballot is announced.
Ordinarily, however, not all of it has been converted into acetic acid, for the oxidation does not all stop at this step. As the oxidation goes on, some of the acid is oxidized into carbonic dioxide, which is, of course, dissipated at once into the air, and if the process is allowed to continue unchecked for a long enough period much of the acetic acid will be lost in this way.
When we remove a muscle from the body it may remain capable of contracting for some time. By studying it under these conditions we find that it gives rise to carbonic dioxide and other substances, and liberates heat whenever it contracts.
Gases emitted from the interior in volcanic eruptions and in other ways have ever added to it, and are adding to it now. On the other hand, the atmosphere has constantly suffered loss, as it has been robbed of oxygen by the oxidation of rocks in weathering, and of carbon dioxide in the making of limestones and carbonaceous deposits.
"I thought it was best to be prepared," Steve said. "You know how these work?" Rick nodded. "We both do." The rebreathers, unlike Scubas, which were filled with compressed air, used oxygen which was recycled through a canister of chemicals that removed water vapor and carbon dioxide. They were completely self-contained; no bubbles were emitted.
To a slight extent also the skin may absorb liquid substances, these being taken up by the blood and lymph vessels, and perform a respiratory function, throwing off carbon dioxide. But the most important function of the skin, in addition to protection, is that of serving as
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