منابع مشابه
Cerebral ammonia metabolism.
To the Editor: I have read the paper by Phelps, Hoffman, and Raybaud "Factors Which Affect Cerebral Uptake and Retention of NH3" (Stroke 8: 694, 1977) with considerable interest, because of my own concern with cerebral ammonia metabolism. There are several questions that I would like to ask concerning their paper. What was the concentration of the ammonia in the test bolus? If it was 10 moles p...
متن کاملFaecal ammonia and pH during lactulose administration in man: comparison with other cathartics.
The effect of lactulose on faecal pH and ammonia has been studied in three normal subjects with the aid of dialysis of faeces in vivo. Observations were also made with sodium sulphate and the two hexahydric alcohols, mannitol and sorbitol, given in doses sufficient to cause a similar increase in stool weight. All four cathartics rendered the stool more acid, but there was no increase in the con...
متن کاملAmmonia toxicity and cerebral oxidative metabolism.
Ammonia toxicity and cerebral oxidative metabolism. Am. J. Physiol. 200(3) : 420-424. 1961. -Effects of NH&l on oxidative metabolism of cat cerebral cortex slices and mitochondria incubated in vitro were studied. In slices, addition of IO mM NH&l to the incubation medium resulted in significant (16%) reduction of O2 uptake, doubling of lactic acid production and marked increase of glucose utili...
متن کاملInfluence of chronic lactulose ingestion on the colonic metabolism of lactulose in man (an in vivo study).
The effects of a chronic load of nonabsorbable sugars on intracolonic bacterial metabolism of carbohydrates and on H2 breath excretion are disputed. However, most of the discussion relies on indirect evidence or on results of in vitro studies. Thus, we attempted to assess directly and in vivo the effects on intracolonic metabolism of lactulose of a chronic oral load of this nonabsorbable disacc...
متن کاملThe effect of lactulose, pectin, arabinogalactan and cellulose on the production of organic acids and metabolism of ammonia by intestinal bacteria in a faecal incubation system.
An in vitro faecal incubation system was used to study the metabolism of complex carbohydrates by intestinal bacteria. Homogenates of human faeces were incubated anaerobically with added lactulose, pectin, the hemicellulose arabinogalactan, and cellulose, both before and after subjects had been pre-fed each carbohydrate. Fermentation of added substrate was assessed by the production of short-ch...
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ژورنال
عنوان ژورنال: Pediatric Research
سال: 1988
ISSN: 0031-3998,1530-0447
DOI: 10.1203/00006450-198809000-00057