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1.
J. Leurquin 《Cellular and molecular life sciences : CMLS》1947,3(5):198-199
Summary As Tyrothricin —Dubos's discovery of the antibiotic agent extracted from cultures ofB. brevis — does not give true aqueous solutions and retains, in the colloïdal state of the usually employed solutions, toxic properties for polymorphonuclear blood cells, we have attempted to effect the solubilization and detoxification of this compound. Treatment with formalin in given proportions results in making it water-soluble. The action of the formalin-treated compound on blood cells suspended in Ringer's solution seems to show a loss of toxicity. Subcutaneous and intramuscular injections in mice do not give visible general toxic effects, and the experiments incite to further investigations in this direction. 相似文献
2.
Summary The activity of three urea-cycle enzymes, argininosuccinate synthetase, argininosuccinase and arginase have been studied in the ftal and new-born liver of rats. The activity increases with regularity between 17.5 days of pregnancy and birth in control foetuses. The lack of corticosteroid from 18.5 days of pregnancy decreases the activity of argininosuccinate synthetase. After administration of cortisol (hydrocortisone), to these 18.5-day-old foetuses lacking of corticosteroids, both activities of argininosuccinate synthetase and arginase are enhanced.
Ce travail a été réalisé avec l'aide de la Délégation Générale à la Recherche Scientifique et Technique (contrat No 737 1148). 相似文献
Ce travail a été réalisé avec l'aide de la Délégation Générale à la Recherche Scientifique et Technique (contrat No 737 1148). 相似文献
3.
Summary The enzymatic hydrolysis of propionylcholine (PrCh), acetylthiocholine (AcThCh), and butyrylthiocholine (BuThCh), by extracts of the muscle rectus abdominis, was determined. Inhibition of this hydrolysis by D.F.P. and 3318 CT [bis(pipéridinométhylcoumaranyl- 5)cétone diméthiodide] — utilized over a range of concentrations covering both specific and non-specific concentrations—showed that PrCh is hydrolyzed by an acetylcholinesterase (70%) and an Xcholinesterase (30%), AcThCh by the AcChE (70%), the XChE (15%) and a thioesterase (15%) and BuThCh by the XChE (70%) and a thioesterase (30%). 相似文献
4.
Summary The authors studied the kinetics of the inhibition of the copper-catalysed oxydation of ascorbic acid by versene and some proteins. The versene-inhibition attains slowly the theoretical value, when added after the Cu++ to ascorbic acid. Proteins inhibit non-competitively and completely, when added to the vitamine either after or before the copper. This result may be interpreted as indicating an interaction between protein and the complex (AH-Cu++).
Note No 2 sur l'oxydation cuprique de l'acide ascorbique. Note No 1, voir réf.3. 相似文献
Note No 2 sur l'oxydation cuprique de l'acide ascorbique. Note No 1, voir réf.3. 相似文献
5.
Summary The relationship between yolk entoblast and the nutritional medium in cultures of chicken blastoderm, classical type, was studied. In addition, some refinements to the research ofNew
5–7, and some modifications permitting operations from the dorsal side, are proposed.
Travail subventionné par le Fonds national suisse de la Recherche scientifique. 相似文献
Travail subventionné par le Fonds national suisse de la Recherche scientifique. 相似文献
6.
Zusammenfassung 90 Tage nach einer in der Gegend der Pfortader erfolgten Autotransplantation der Schilddrüse bei weiblichen Albinoratten zeigt die histologische Untersuchung der Transplantate alle Zeichen einer gesteigerten Tätigkeit. Dem entgegengesetzt befinden sich Nebenniere, Leber und Hypophysis in dem als Folge der Schilddrüsenextirpation beschriebenen Zustand. Dieser scheinbare Widerspruch stützt die Annahme einer Inaktivierung des Schilddrüsenhormons durch die Leber. 相似文献
7.
Kurt H. Meyer Ed. H. Fischer P. Bernfeld 《Cellular and molecular life sciences : CMLS》1947,3(3):106-106
Summary In a series of 32 urinary calculi, examined with X-rays and microscope, 2 were found to consist of hydroxylapatite, 4 of whewellite, 4 of struvite and 15 of uric acid. 4 stones contained two minerals: apatite + brushite, apatite + whewellite and both hydrates of Ca-oxalate. 相似文献
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M. Lourau 《Cellular and molecular life sciences : CMLS》1959,15(5):192-193
Summary In intact guinea-pigs fed with glucose solutions of different concentrations, the main limiting factor of absorption is not the gastric emptying but the hyperglycaemia. 相似文献
10.
P. Sentein 《Cellular and molecular life sciences : CMLS》1956,12(7):257-258
Summary Triethylenemelamine (1/400 to 1/12000) induces pseudo-chiasmas and chromosome-breakage in the egg-segmentation mitoses ofPleurodeles waltlii Michah. The primitive effect is stickiness, breakages appear subsequently, but without an interval of time between: the primary physiological and the secondary genetical effect cannot be separated. There are points of breakability, which explains the symmetry of certain fragments. The action is inverted in the epidermal cells of the larvae, where spindle alterations are prominent. Cytodieresis is never inhibited. 相似文献
11.
J. Jacob 《Cellular and molecular life sciences : CMLS》1946,2(3):110-111
Summary Saline extracts from rabbit's skeletal muscles obtained and dialyzed at the ionic strength 0.15 contain at least 11 electrophoretically distinct components. Five of these components (n, m, t, l, s) have properties which are comparable with some characteristics of the myogens ofWeber, another component (h) is probably myoalbumin. Muscular proteins which are more soluble at higher ionic strength are not homogenous: there must be not one but two or more electrophoretically different myosins. Much work is needed to establish accurate relations between electrophoretic and classical muscular proteins. 相似文献
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13.
Ch. Oberling W. Bernhard Mme A. Dontcheff P. Vigier 《Cellular and molecular life sciences : CMLS》1954,10(3):138-140
Zusammenfassung
In vitro gezüchtete Zellen des Rous'schen Sarkoms wurden der Wirkung von Röntgenstrahlen und radioaktivem Alkohol (CH3C14H2OH) ausgesetzt und darauf elektronenoptisch untersucht. In einem geringen Prozentsatz der untersuchten Kulturen (9,5%) konnten virusartige Partikelchen von 60 bis 90 mµ Durchmesser intra- oder extrazellulär dargestellt werden, die mit den vonClaude, Porter undPickels gefundenen identisch sind und wahrscheinlich dem Rousschen Virus zugeordnet werden können. Es wurden Kolonien von solchen Gebilden intrazytoplasmatisch in Form von Einschlusskörperchen beobachtet. Auch unbestrahlte Kontrollen von Sarkomzellen wiesen Viruskörperchen auf, wenn auch bisher in geringerem Prozentsatz.Es ist vorderhand noch unsicher, ob der Bestrahlung eine primäre Rolle in der Darstellbarkeit dieser Viren zukommt. 相似文献
14.
Summary Concentrated normal urines were investigated by an immuno-electrophoretic technique using specific antiserum directed against uromucoid (=Tamm andHorsfall's urinary mucoprotein).A single precipitation line was observed, which, however, presented two distinct maxima. The faster antigen appeared to be situated between albumin and 1-globulin, while the slower antigen seemed to be ana
2-globulin. Both antigens were immunologically identical with uromucoid, although the latter had been eliminated by salt precipitation from the urines used in this experiment.The above findings can best be explained by assuming the occurrence of a polymer series of uromucoid, of which the lower members would be soluble in 0.58M NaCl, while the higher terms would representTamm andHorsfall's mucoproteinsensu stricto. It is suggested that cylindroids and nubecula represent visible forms of uromucoid. 相似文献
15.
H. Brasseur M. J. Dallemagne J. Melon 《Cellular and molecular life sciences : CMLS》1948,4(11):421-424
Summary In answer to objections put forward byBrandenberger andSchintz against their theory concerning the chemical nature of bone salts, the authors afford supplementary evidence about the real crystalline and chemical entity of hydrated tricalcium phosphate. According to the conditions, the precipitate contains either dicalcium phosphate or lime and this affects the nature of the product obtained by calcination.The mineral bone substance is not a hydroxylapatite because it turns either to carbonato-apatite or oxyapatite according to carbon dioxide being kept or not in the crystal lattice. The X-ray patterns of those two apatites are undoubtedly different.
Réponse à une note deE. Brandenberger etH. R. Schinz, Exper.4, 59 (1948). 相似文献
Réponse à une note deE. Brandenberger etH. R. Schinz, Exper.4, 59 (1948). 相似文献
16.
Kurt H. Meyer G. Noelting P. Bernfeld 《Cellular and molecular life sciences : CMLS》1947,3(9):370-371
Summary A colorimetric method based on the reducing power of the aldehydic end group has been developed in order to determine the M. W. of polysaccharides. It has been found that corn amylose contains chain molecules of much higher degree of polymerization than potato amylose. 相似文献
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18.
M. Larpent-Gourgaud M. P. Aumaître 《Cellular and molecular life sciences : CMLS》1977,33(12):1601-1602
Summary The radiations coming from Blanc Brillant de Luxe' fluorescent stimulate the growth and ramification of protonema ofCeratodon purpureus (Hedw.) Brid. This stimulation is caused by red light (660 nm). Multidirectional lightening is more favorable than unidirectional exposition. 相似文献
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20.
Summary Free and masked SH groups were determined in haptoglobine (Hp) haemoglobine (Hb) (horse) and in their complex (Hb-Hp). Hp contains no free SH groups, but up to 9 groups are liberated per mol on denaturation by guanidine. The Hb-Hp complex reacts with the same number of Hg++ ions as free Hb, but it reacts with one less Ag+ ion than free Hb. The 4th Ag+ ion is taken up only in the presence of low concentration of a denaturing agent. Hg++, Ag+, Cu++ pcmb and iodine do not inhibit the association of Hb and Hp nor do they diminish the peroxidasic activity of the complex. Sh groups of Hb do not seem to be involved in these two reactions. 相似文献