1,171 Result(s)
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Article
Die Unzulänglichkeit des Nachweises von Azetaten durch Bildung von basischem Ferriazetat
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Article
Toxikologie
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Article
X-Antigen-freie Mutanten von Proteus OX19
A phage specific for Proteus X 19 and X 2 strains is described. The secondary growth appearing after lysis of OX 19 cultures is devoid of the X-Antigen reacting with typhus sera. The phage is inactive against ...
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The synthesis of the purine nucleus byEscherichia coli, a study on the mode of action of sulfa-drugs
In Kulturen vonEscherichia coli, die durch Sulfonamidverbindungen gehemmt sind, wird 4-Amino-imidazol-5-carboxyamid (II) gebildet. Diese Substanz ist eine Zwischenstufe in der Biosynthese des Purin-(Xanthin-)Syst...
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Quantitative determination of fecal chymotrypsin as a screening test for pancreatic exocrine insufficiency
The diagnostic value of quantitatively measuring fecal chymotrypsin and trypsin activity by using specific substrates has been studied. Objective evaluation of pancreatic exocrine function was accomplished wit...
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A method of studying motility in the esophagus by recording electrical potentials
1. A method for recording electrical potential patterns in the esophagus is described.
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Applications of the formation and behaviour of sulphotellurate in spot test analysis
The decomposition of sulphotellurate leading to deposition of black elemental tellurium has been utilized for the following analytical tests: detection of elemental tellurium and Te-containing semi-conductors,...
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Different locations of carbohydrate-containing sites in the surface membrane of normal and transformed mammalian cells
A soybean agglutinin was found to agglutinate mouse, rat and human cell lines transformed by viral carcinogens, but not hamster cells transformed by viral or non-viral carcinogens. Normal cells from which the ...
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The mechanism of sex determination in Rumex acetosella
Cytogenetic studies were made with particular emphasis on the sex-determining mechanism in Rumex acetosella (6 x = 42) and its hybrids (F 1, F 2, BC 1 and BC 2) with R. hastatulus (synthetic 4 x = 16 = 4 A +4 X =...
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Article
Fine structure of the blue-green phycobiont and its relation to the mycobiont in two Gonohymenia lichens
Electron micrographs of the two closely related lichen species Gonohymenia mesopotamica and G. sinaica were examined. It was found that the fine structure and cytokinesis of the phycobiont, Gloeocapsa sp. are not...
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Changes in the structural organization of the surface membrane in malignant cell transformation
Malignant transformation of normal cells resulting in agglutinability by the carbohydrate-binding protein Concanavalin A can be explained by three types of changes in the structural organization of sites on th...
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Location of amino acid and carbohydrate transport sites in the surface membrane of normal and transformed mammalian cells
Amino acid and carbohydrate transport in normal and malignant transformed hamster cells was studied after binding of the protein Concanavalin A (Con. A) to the surface membrane. Experimental conditions were us...
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Dominance and non-complementation among pink-adenineless mutants of Schizophyllum commune involving two discrete genes
In Schizophyllum commune, adenineless mutations conferring pink color fell into two loosely linked loci, ad-4 and ad-7. The mutations were tested for dominance and complementation in dikaryons, and several of the...
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Article
Separation of two strains of rats with inbred dissimilar sensitivity to doca-salt hypertension
La réponse au régime Doca-sel (D. S.) a été utilisée comme critère de sélection pour séparer, par croisement consanguin, deux colonies de rats manifestant une susceptibilité bien différente à l'hypertension ar...
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Δ6-Tetrahydrocannabinol-7-oic acid, a urinary Δ6-THC metabolite: Isolation and synthesis
7-Hydroxy-Δ 6-tetrahydrocannabinol (7-Hydroxy-Δ 6-THC), ein psychotomimetisch aktiver Metabolit desΔ 6-THC, wird von Kaninchen in inaktiveΔ 6-THC-7 Säure metabolisiert. Die Synthese dieser Säure wird beschrieben.
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Article
Stabilizing effect of anti-normal erythrocyte catalase antibody on the labile catalase variant present in Swiss-type acatalasemia
Die instabile Katalase-Variante, welche in den Erythrocyten des Akatalasie-Falles A.B. vorkommt, lässt sich in vitro durch Zusatz von Anti-Katalase IgG-Fraktion oder von Fab-Fragmenten ohne Aktivitätseinbusse ...
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The presence of unusual microtubular structures in senescent cells of Chlamydomonas dysosmos
Complexes of twisted ribbons composed of ordered arrays of microtubules are identified in close association with the plasmalemma and the surfaces of some organelles in senescent cells of photoheterotrophically...
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Population ecology of Sulfolobus acidocaldarius
Ecology of Sulfolobus acidocaldarius was studied in situ by the use of the immunofluorescence and immunodiffusion techniques. The fluorescent antibodies (FA) prepared against four strains of Sulfolobus were highl...
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Intestinal lymphoma with unusual sequence of serum IgA changes
A patient with Mediterranean type of abdominal lymphoma presented an unusual sequence of serum IgA changes, initially elevated, then low, and finally excessive. The correlation between the IgA changes and the ...
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Article
Sexual differentiation in Aspergillus nidulans
Aspergillus nidulans was completely devoid of fruit bodies when grown on manganese deficient cultures. This result was shown earlier to be due to a lack of α-1,3 glucan in the cell wall. Several enzymes of carbo...
