Eine Bemerkung zur Langevin-Gleichung

Résumé Quelques questions concernant une généralisation de l'équation deLangevin sont discutées.

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Jetzt Universität Hobart, Hobart, Tasmanien.     

Beitrag zur Frage der Eisenresorption

Summary In rabbits whose intestinal tract has been sterilised by means of penicilline and terramycine, there is no detectable iron resorption, even when the animals are made anaemic.Iron resorption can be restored by means of addition of terramycine-resistentE. coli or Enterococci to the diet.     

Experimenteller Beitrag zur Frage der Mitochondrienfunktion

Summary In the phase microscope it can be seen that cloudy swelling is the consequence of an enlargement of the mitochondria, whereby the membrane of the mitochondria is detached from the body of the mitochondrion. An increased water intake seems to be the reason of this phenomenon.The intraperitoneal injection of hen egg albumen is followed after several hours by an accumulation of hyaline droplets in the protoplasma of the renal tubule cells. The PM reveals that this foreign protein is stored within the mitochondria, which are converted into brilliant granules. The same is true for the accumulation of vital dyes in kidney tubule cells, but in this case there is a combination of the dye with protein deriving from a slight lesion of the cells.     

Beitrag zur Frage der Entstehung mehrkerniger Zellen

Summary The author describes the origin of 2 daughter cells of HeLa cellular line: one double nuclear and the other single nuclear cell. Both cells origined by the mitotic division of the single nuclear mother cell without any artificial treatment. The observation is documented by the series of partial photographs of the time-lapse cine-film.     

Eine Methode zur Bestimmung des Endpunktes der Sol-Gel-Umwandlung bei der Plasmagerinnung

Summary In order to measure the clotting time of blood plasma the sol-gel transformation is observed. The process is retarded with mol/18 of 1,4-oxyphenyl-sulfonate. A lowering of the prothrombin content of 50% results in a difference of time against normal values of 45–55 sec., compared with 3–4 sec. with the method ofQuick.     

Neue Aspekte zur Frage der Nephrotoxizität von Phenacetin

Summary Experiments on the metabolism of phenacetin in the rat are reported. Estimations of phenacetin, total acetyl-p-aminophenol,p-phenetidine and 2-hydroxyphenetidine-sulfate in the urine excreted after ingestion of phenacetin reveal an unusual dose-dependence of the metabolic pattern. The degradation of phenacetin through deacetylation to phenetidine is greatly enhanced by raising the dose. The results are briefly discussed in view of their possible significance in the development of analgesic nephropathy in man. As a working hypothesis for further experiments it is assumed, that phenetidine is the main toxic agent in nephropathy due to phenacetin abusus.     

Beitrag zur Frage nach der Beteiligung lebender Stammzellen am Saftsteigen

Ohne Zusammenfassung     

Eine neue Umlagerung der Phenylalkane und ihre Beziehung zur Friedel-Crafts-Reaktion

Summary In the course of various methods of Friedel-Crafts alkylation reactions, isomerizations are taking place which could only partly be explained by existing theories. On the basis of a newly discovered rearrangement of phenylalkanes, a large part of the hitherto described anomalous reactions may be explained. Possible mechanisms for these rearrangements are discussed.     

Eine Methode zur fortlaufenden Blutentnahme aus der Vena portae von Hunden

Summary A method is described for the introduction of a PVC.-Catheter into the portal vein of dogs. The catheter is introduced into one of the mesenteric veins of the ileum and pushed through the vena mesenterica communis until the portal vein is reached. The catheter, the end of which is fixed to the skin on the outside, can be removed without any injury to the animal by just drawing it out through the skin. The method can be applied for taking blood at various intervals during experiments on absorption, measurement of blood pressure in the portal vein and its branches, for the injection of substances directly into the liver, etc., on unanaesthetized animals.     

Zur Frage der Natur der Ablagerungen in den Gichtknoten

Summary A gout-tophus, which we examined by X-rays and micro-crystallographic methods was definitely proved to be a deposit of monosodiumurate-monohydrate in the form of crystals which could just be detected under the microscope.     

Zur Frage der Natur der Ablagerungen in den Gichtknoten

Summary The spectrum of the aurora of April 17, 1947, exhibited again the forbidden line 5199 Å of the nitrogen atom and confirmed the long duration of this excitation calculated on the basis of theory at 5 hours.     

Intermolekulare Wechselwirkungen der Folsäure mit N-phthaloyl-dl-glutaminsäure. ein beitrag zur Frage der teratogenen wirkung des thalidomid

Summary With the addition of N-phthaloyl-dl-glutamic acid, a metabolite of thalidomide, the solubility of folic acid rises owing to greater complexity. These results could explain the teratogenic effect of thalidomide.     

Zur Frage der Indolyl-3-acetaldehyd-Mutase in Mikroorganismen

Summary No evidence of the existence of a single indoleacetaldehyde mutase in microorganisms is available. Different results from studies on living cultures and cell-free extracts ofEndomycopsis vernalis, Hansenula anomala, Torulopsis utilis andAgrobacterium tumefaciens indicate the participation of 2 different enzymes: an aldehyde dehydrogenase and an aldehyde reductase.     

Eine sauerstoffundurchlässige Zone in der Wand der Arteria carotis der Katze

Summary By means of local pO₂ measurements with Pt-needle electrodes an oxygen impermeable zone in the arteria carotis of the cat has been found.     

Künstliche Ernährung von Blattläusen: Eine neue Technik zur Herstellung der Parafilm-Sachets

Summary A new technique is described which allows massproduction of parafilm-sachets, containing artificial diet for aphids, under sterile conditions.     

Eine Methode zur drahtlosen Messung der Atemfrequenz and Säuglingen A Method for Wireless Telemetry of Breath-Frequency of Babies

Summary A device is introduced which allows a continuous wireless registration of breath frequency of babies.     

Zur Frage der Wirkung von DTPA auf Säugerchromosomen in vitro

Summary The influence of DTPA on the chromosome aberration rate of Chinese hamster cells in culture was studied. No increase of the aberration rate was observed after treatment with 10^–2 and 10^–3 M concentrations.     

Eine quantitative Methode zur zahl- und volumenregulierten Übertragung von Mikroorganismen in Suspensionsmedien

Résumé A l'aide d'un exemple, les auteurs exposent en détail une méthode permettant d'observer facilement le transport de microorganismes dénombrables ou de particules quelconques, en nombre et volume désirés. Cette méthode, reposant sur le principe de la règle de 3 inverse, ne peut être employée que si l'on a établi au préalable des conditions de suspension stable. Elle convient très bien aussi aux préliminaires d'expériences microbiologiques.

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Mit Unterstützung der Deutschen Forschungsgemeinschaft.     

Schweiz Stiftung zur F?rderung der Ern?hrungsforschung in der Schweiz

Ohne Zusammenfassung