| hydrogen breath t. |
(for deficiency of lactase or other hydrolases, or colonic overgrowth of bacteria): a known quantity of carbohydrate is administered and the subject's exhalations are subsequently trapped and measured at timed intervals; patients unable to digest or absorb carbohydrates in the small intestine will have excess carbohydrates in the colon which are broken down there by bacterial fermentation, causing an increase of blood hydrogen and thus of hydrogen exhaled by the lungs.
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| hydrogen d. |
a substance or compound that gives up hydrogen to another substance (the hydrogen acceptor).
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| hydrogen i. |
the nucleus of the hydrogen atom or a hydrogen atom that has lost its electron, H+; it bears a positive charge equivalent to the negative charge of the electron and is called a proton.
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| hydrogen ion c. |
the degree of concentration of hydrogen ions in a solution; it is inversely related to the pH of the solution by the equation [H+] = 10-pH.
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| hydrogen n. |
the amount of hydrogen that one gram of a fat can absorb; it represents the quantity of unsaturated fatty acids in the fat.
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