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  • 1975-1979  (8)
  • 1960-1964  (1)
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Year
  • 1
    Electronic Resource
    Electronic Resource
    THE VAPOR PHASE VISCOSITIES OF THE PENTANES (1963)
    s.l. : American Chemical Society
    The @journal of physical chemistry 〈Washington, DC〉 67 (1963), S. 517-518 
    Details
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/j100796a516
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    The Effect of Benzimidazole and Red Light on the Senescence of Detached Leaves of Oryza sativa cv. Ratna (1975)
    Oxford, UK : Blackwell Publishing Ltd
    Physiologia plantarum 34 (1975), S. 0 
    Details
    ISSN: 1399-3054
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Excised rice leaves (Oryza sativa L. cv. Ratna) werefloated on a 10–3M solution of benzirnidazole under dark or continuous red light. Compared to the water control a degradation of chlorophyll, protein, RNA, DNA and a decrease in the activity of alkaline inorganic pyrophosphatase was delayed at the same time as an increase of α-amino nitrogen and the activity of acid inorganic pyrophosphatase occurred, Benzimidazole was more effective under red light than in the dark in retarding senescence. The possible role of inorganic pyrophosphatases is discussed with respect to biosynthesis during leaf senescence.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1399-3054.1975.tb01858.x
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  • 3
    Electronic Resource
    Electronic Resource
    Studies on certain digestive enzymes in the alimentary canal ofOdontotermes obesus (Isoptera: Termitidae) (1976)
    Springer
    Entomologia experimentalis et applicata 20 (1976), S. 113-122 
    Details
    ISSN: 1570-7458
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Description / Table of Contents: Zusammenfassung 1. Der Nahrungskanal vonOdontotermes obesus-Arbeitern enthält — nach in-vitro Studien — Amylase, Invertase und α-Galactosidase, sowohl im Mittel- wie im Hinterdarmbereich. 2. Im Mitteldarm waren die pH-Optima bei der Amylase 5,8–6,6, bei der Invertase 6.6 und bei der α-Galactosidase 5,2. 3. Im Hinterdarm betrugen die entsprechenden Werte bei der Amylase 6.6, bei der Invertase 5.2 und 6.6, und bei der α-Galactosidase 8.4. 4. Bei vergleichenden Untersuchungen der Aktivität der Carbohydrasen erwies sich Amylase als das aktivste Enzym im Mitteldarm; sie hydrolysierte 86,5% der Stärke innerhalb von 8 h. 5. Die Sekretion von Invertase wird kontrolliert durch die Gegenwart von Nahrung im Verdauungstrakt. Die maximale Sekretion von Invertase im Mitteldarm war, wie festgestellt wurde, unmittelbar nach der Nahrungsaufnahme.
    Notes: Abstract Results of thein vitro studies on certain digestive enzymes from the alimentary canal ofOdontotermes obesus workers indicated the presence of amylase, invertase (glucosaccharase) and α-galactosidase both in the mid- and hindgut of this termite. The pH optima of different enzymes in the midgut were: amylase, 5.8–6.6; invertase, 6.6 and α-galactosidase, 5.2. In the hindgut the pH optima of the enzymes were: amylase, 6.6; invertase, 5.2, 6.6 and α-galactosidase, 8.4 Studies on the relative activity of the carbohydrases indicated that amylase was the most active enzyme in the midgut of these termite workers hydrolyzing 86.5% of starch within 8 hr. α-Galactosidase was the least active enzyme in the midgut. Maximum activity of invertase was recorded immediately after food intake.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01402470
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  • 4
    Electronic Resource
    Electronic Resource
    Digestion and absorption of carbohydrates inOdontotermes obesus (Isoptera: Termitidae) (1975)
    Springer
    Entomologia experimentalis et applicata 18 (1975), S. 357-366 
    Details
    ISSN: 1570-7458
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Description / Table of Contents: Résumé Des ouvriers d'Odontotermes obesus ont été alimentés 5 ou 10 minutes avec du sucrose ou divers autres sucres préalablement colorés avec du bleu de bromophénol. Des dissections à intervalles de temps rapprochés ont permis de suivre la progression du colorant dans le tube digestif; simultanément on a pu suivre la progression ou la transformation des sucres par chromatographie sur papier, ou leur passage dans l'hémolymphe. L'aliment coloré atteint le rectum 6 heures après l'ingestion, mais au lieu d'être évaqué le colorant est ensuite refoulé vers l'intestin moyen où sa concentration s'accroît secondairement, alors que l'intestin postérieur devient incolore 72 heures après l'ingestion. Les études chromatographiques montrent que tous les sucres, en particulier glucose, galactose, fructose, arabinose, xylose, sucrose et raffinose, parviennent au niveau de l'intestin postérieur 10 minutes seulement après l'ingestion, donc plus rapidement que le colorant. L'étude du Ph intestinal à différents niveaux du tactus intestinal révèle que le Ph varie, selon les zones, de 6.8 à 7.0, ces valeurs n'étant pas différentes, chez un insecte à jeun et chez un insecte alimenté. L'enzyme responsable de l'hydrolyse du sucrose n'est présente que dans l'intestin moyen et l'intestin postérieur. Indépendamment des produits d'hydrolyse des sucres, l'intestin moyen renferme alors deux oligosaccharides non-identifiés qui pourraient résulter d'une syntheèse à la faveur de bactéries. Le temps nécessaire pour la transformation totale des divers sucres en glucose, et pour l'absorption de ce dernier est précisé.
    Notes: Abstract Studies on the rate of passage of dye-mixed food through the alimentary canal ofOdontotermes obesus (Rambur) workers indicated a relationship between the movements of sugar and the dye mixed with it. Dye-mixed food traversed the entire alimentary canal within 6 hours after ingestion. No evacuation of dyed excreta was recorded even up to 72 hours after feeding. The hydrogen-ion concentration of the alimentary canal was found to be regulated within a pH range of 6.8 and 7.0. Presence or absence of food did not affect the pH of the gut. Investigations into the digestion and absorption of sucrose, fructose, arabinose and xylose revealed that these sugars underwent transformation to glucose prior to their absorption from the gut of these termites.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00628365
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  • 5
    Electronic Resource
    Electronic Resource
    Thermal studies of bis 2-amino-5-phenyl-1,3,4-thiadiazole copper(II) sulphate (1978)
    Springer
    Journal of thermal analysis and calorimetry 14 (1978), S. 229-234 
    Details
    ISSN: 1572-8943
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Résumé La décomposition thermique du “sulfate de cuivre(II) bis(amino-2 phényl-5 thiodiazole-1,3,4) a été étudiée par TG, ATD et TGD. La conductibilité électrique de ce composé a également été mesurée à l'état solide à diverses températures. La décomposition est sans doute un processus contrÔlé par la nucléation et s'amorce sur des défauts de sites.
    Abstract: Zusammenfassung Die thermische Zersetzung von ’Bis-2-Amino-5-Phenyl-1,3,4-Thiadiazol-Kupfer(II)-Sulfat’ wurde durch TG, DTA und DTG untersucht. Die elektrische Leitfähigkeit5der Verbindung im festen Zustand wurde ebenfalls bei verschiedenen Temperaturen gemessen. Es wird angenommen, dass die Zersetzung ein durch Keimbildung gesteuerter Vorgang ist und an den Defektstellen anfängt.
    Notes: Abstract Thermal decomposition of bis 2-amino-5-phenyl-1,3,4-thiadiazole copper(II) sulphate has been studied by TG, DTA and DTG. The electrical conductivity of the compound in the solid state have also been measured at different temperatures. It is believed that decomposition is a nucleation controlled process and starts at the site of defects.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01915160
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  • 6
    Electronic Resource
    Electronic Resource
    Pre-precipitation in Al-0.1 wt % Cr alloy (1978)
    Springer
    Journal of materials science 13 (1978), S. 1136-1138 
    Details
    ISSN: 1573-4803
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00544713
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  • 7
    Electronic Resource
    Electronic Resource
    Root uptake coefficient for Cl ions in corn as affected by transpiration rates and solution concentration (1976)
    Springer
    Plant and soil 44 (1976), S. 521-525 
    Details
    ISSN: 1573-5036
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary Root uptake rate and root uptake coefficient for Cl ions were determined in corn at two transpiration rates and three solution concentrations. Transpiration rate had pronounced effect on root uptake rate and root uptake coefficient especially at low solution concentration. Root uptake rate increased as the concentration of Cl ions in the solution increased. The root uptake coefficient decreased as Cl concentration in the solution increased from 20 meq/l to 40 meq/l but it did not change when the concentration was raised to 80 meq/l.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00011372
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  • 8
    Electronic Resource
    Electronic Resource
    Salt distribution around roots of wheat under different transpiration rates (1976)
    Springer
    Plant and soil 44 (1976), S. 141-147 
    Details
    ISSN: 1573-5036
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary Magnitude of Na and Cl accumulation around wheat roots was studied under different transpiration conditions in a loamy sand soil salinized with sodium chloride to an electrical conductivity of 4.1 mmho/cm in the saturation extract. A significant correlation was observed between rate of water loss per unit root length and Na and Cl content of the soil closely adhering to the roots. Under high transpiration condition, maximum ion accumulation occurred in the apparent free space of roots followed by the soil closely adhering to the roots. Results indicate that salt concentration at the root surface is markedly altered under the influence of transpiration rate such that under high transpiration conditions, the plant roots may be exposed to a much higher salt concentration than that anticipated from an analysis of the bulk soil samples.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00016962
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  • 9
    Electronic Resource
    Electronic Resource
    Rapid separation of metal ions on hydrous zirconium oxide paper (1977)
    Springer
    Chromatographia 10 (1977), S. 309-311 
    Details
    ISSN: 1612-1112
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary Hydrous zirconium oxide paper has been prepared by treating Whatman No. 1 chromatographic paper strips with 0.1 mol dm−3 zirconium oxychloride and 6% aqueous ammonia. Rf values of 28 metal ions in different aqueous solvent systems are reported. Based on the behaviour, 59 binary and/or ternary metal ion seperations of analytical and radiochemical interest have been successfully achieved. The separations are very rapid and accomplished within 20 minutes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02263005
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