Absorption of vitamin C from the human buccal cavity
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منابع مشابه
Absorption of vitamin C from the human buccal cavity.
1. Ascorbic acid was absorbed across the mucosa of the human mouth. 2. Omission of sodium ions from the medium decreased the absorption of ascorbic acid. 3. The presence of D-glucose, or 3-O-methyl-D-glucose, increased the absorption of ascorbic acid but D-fructose had little effect and D-mannitol had no effect. 4. Calcium ions also increased ascorbic acid absorption probably by a secondary ef...
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1. Certain sugars were transported across the buccal mucosa by a carrier-mediated mechanism. 2. The metabolic loss of sugars from the mouth in a 5 min test period was negligible. 3. The buccal mucosal transport process was stereospecific for D-glucose and L-arabinose. 4. The absorption of D-glucose, galactose and 3-O-methyl-D-glucose was at least partly dependent on the presence of sodium ions ...
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appropriate controls the concentration of each amino acid could be established. The absence of glycylproline ( < 0 . 5 m ~ ) from the samples were established by t.1.c. From each of two to six animals a minimum of four sacs were prepared from the ileum. Examination of sacs after incubation by lightmicroscopy failed to show any disruption caused by the experimental procedure. Fig. ] ( a ) shows ...
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1. Physiological salt solution is absorbed from the pericardial cavity of medium-sized rabbits at a rate of approximately 1.3 cc. per hour. This absorption is via the subepicardial blood capillaries. 2. Rabbit serum and horse serum are absorbed extremely slowly-an indication of the low-grade lymphatic drainage of the pericardial sac. 3. Graphite particles of bacterial dimensions are also remove...
متن کاملStable isotope-labelled vitamin C as a probe for vitamin C absorption by human subjects.
Factors affecting absorption of physiological doses of vitamin C in man have not been widely studied, partly because few suitable tools exist to distinguish recently absorbed vitamin C from endogenous vitamin. Stable isotope-labelled vitamin C provides such a tool. Fifteen healthy non-smoking subjects aged 26-59 years were studied. Each received 30 mg l-[1-(13)C]ascorbic acid orally on two occa...
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ژورنال
عنوان ژورنال: British Journal of Nutrition
سال: 1979
ISSN: 0007-1145,1475-2662
DOI: 10.1079/bjn19790085