Eine klinische Methode zur Bestimmung des Ammoniaks im Harne

Malfatti, H.

doi:10.1007/bf01469921

Cited by 11 publications

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“…3. Titrable acidity and ammonia, by Malfatti' s method (12). As only small quantities were available, a micro-method, using a comparator, was employed.…”

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confidence: 99%

“…There is then a marked rise, which continues for the rest of the experiment. Moreover, the curves are much smoother than the normals, and really consist of a steady fall for the first 12 14 Ti r1: iFj4oAuRts. The swing on the normal curves are of much greater amplitude than on the starvation charts, even up to as much as 2-times.…”

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confidence: 99%

“…As soon as each specimen of urine was passed, the volume was measured, and the whole was poured into a flask containing a small 260 VARIATIONS IN (12). As only small quantities were available, a micro-method, using a comparator, was employed.…”

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confidence: 99%

“…The titrable acidity having been determined, the ammonia content was arrived at by Malfatti's (1908) formalin method. To the solution obtained above 10 c.c.…”

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confidence: 99%

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Twenty‐four hour observations on the metabolism of normal and starving subjects

Cohen¹,

Dodds²

1924

The Journal of Physiology

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THE observations about to be described form a further part of a series of investigations into the metabolic activities over given periods. They differ from those already publishe%l in that the observation time is much longer-24 hours. Working with short periods, one of us (E. C. D. () demonstrated that there were more or less definite relations between the alveolar and blood C02 tension, gastro-intestinal secretion (2), and certain urinary constituents(3). These relations were altered by the effect of meals.The results of the previous investigations can be summarised briefly as follows:1. During a period of starvation, the alveolar C02 tension remains more or less constant, whilst the urinary pH and A + N value do not show any definite change.2. After a meal, the alveolar C02 tensions show the characteristic rise followed by a fall. The urinary changes were found to vary according to the meal. Thus the breakfast was followed by a definite alkaline tide, as shown by a rise in the pH and a fall in the A + N value. This alkaline tide was usually of short duration, and was followed by a prolonged acid tide, as shown by a fall in the urinary pH and a rise in the A + N values-both of which obscured any alkaline effect of the next meal.It was felt that these investigations were incomplete, since the observation times were never longer than 8 hours, and ouly the pH and A + N values were determined. The present investigation was undertaken, therefore, in order to clear up the difficulties of the previous observations.Variations in the composition of urine throughout 24 hours have been studied by many observers. Thus Bence Jones(4) was perhaps the first to notice the alkaline tide following a meal. Since this observer's 1 On behalf of the Medical Research Council.PH. LIX. 17

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“…3. Titrable acidity and ammonia, by Malfatti' s method (12). As only small quantities were available, a micro-method, using a comparator, was employed.…”

mentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

“…The titrable acidity having been determined, the ammonia content was arrived at by Malfatti's (1908) formalin method. To the solution obtained above 10 c.c.…”

mentioning

confidence: 99%

See 2 more Smart Citations

Twenty‐four hour observations on the metabolism of normal and starving subjects

Cohen¹,

Dodds²

1924

The Journal of Physiology

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“…The principles involved in the "formol titration" of bacterial cultures or media are the same as those embodied in the methods of Malfatti (1908) and of Henriques and Sorensen (1909) for the titration of urine. They have been applied to the study of bacterial cultures by a number of authors, notably Kendall, Day and Walker (1913), Itano (1916), Berman and Rettger (1918), Foster and Randall (1921), Ayers, Rupp and Mudge (1921), and Kendall (1922).…”

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confidence: 99%