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H Büttner

Publications and source records attributed to H Büttner.

At least 19 recordsLinked to original sources
PubMed1989

[Multicenter study of obstetrico-perinatologic quality control in the Rostock district. I. Comparative medical statistics].

Report about outcome-quality assessment in obstetrics and perinatology using an uniform check list for data collection in the district of Rostock. Various possibilities of outprint of the results in 1985 are demonstrated. For daily data collection in obstetrics a special book has been developed. The investigation concerns a data pool of more than 55,000 deliveries. Considering a trend of the results the following optimal criteria in obstetrics and perinatology are postulated: (table; see text) The check list of the Society of Perinatal Medicine of the GDR for obstetrical and neonatal data collection should be generally used. The soft ware for the computed data analyses has been developed by the "Rechenzentrum der Ernst-Moritz-Arndt-Universität Greifswald". Analysis and output of obstetrical and perinatological datas by means of a personal computer are prepared.

Birth Rate↗
PubMed1980

pH dependency in uptake of sulfonamides by bacteria.

Sulfonamide-sensitive cells of Escherichia coli were incubated under standarized conditions with various sulfonamides and the quantity of sulfonamide uptake into the bacteria measured. The test substances reached a higher concentration inside the bacteria than in the incubation medium, the degree of accumulation varying for the individual substances despite uniformly applied incubation conditions. In all cases a pH dependency was detected which varied with the pKa values of the substances tested. On the basis of the pKa dependency of the pH effect, the sulfonamide uptake can be interpreted as being a passive diffusion process. Knowing the intracellular pH value, which was determined by the DMO method, it was then possible to calculate the theoretically expected value for the accumulation as a concentration coefficient. Since the calculated and experimentally determined values differ approximately by a factor of 2, an intracellular binding of the sulfonamides is assumed. The same results were obtained in cells of sulfonamide-resistant E. coli strains.

Bacteria↗