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  • 1
    Electronic Resource
    Electronic Resource
    Anaplerotic reactions in Anabaena cylindrica
    Amsterdam : Elsevier
    FEBS Letters 158 (1983), S. 79-83 
    Details
    ISSN: 0014-5793
    Keywords: Anabaena cylindrica ; Anaplerotic reaction ; Glycolysis ; Heterocyst ; Tricarboxylic acid cycle ; Vegetative cell
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0014-5793(83)80680-2
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  • 2
    Electronic Resource
    Electronic Resource
    The pyruvate: Ferredoxin oxidoreductase in heterocysts of the cyanobacteriuim Anabaena cylindrica
    Amsterdam : Elsevier
    Biochimica et Biophysica Acta (BBA)/General Subjects 716 (1982), S. 358-365 
    Details
    ISSN: 0304-4165
    Keywords: (A. cylindrica heterocysts) ; Nitrogen fixation ; Pyruvate: ferredoxin oxidoreductase
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology , Medicine , Physics
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0304-4165(82)90028-9
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  • 3
    Electronic Resource
    Electronic Resource
    Spectral emittance and temperature determination of carbon/SiC and SiC/SiC composites
    Amsterdam : Elsevier
    Thermochimica Acta 218 (1993), S. 305-315 
    Details
    ISSN: 0040-6031
    Keywords: Spectral- and total emittance ; high temperature fiber reinforced materials ; multiwavelength pyrometry ; radiation temperature measurement
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0040-6031(93)80431-9
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  • 4
    Electronic Resource
    Electronic Resource
    Total normal and spectral emittance of refractory materials for high temperature ovens
    Amsterdam : Elsevier
    Thermochimica Acta 218 (1993), S. 211-219 
    Details
    ISSN: 0040-6031
    Keywords: emittance measurement ; refractory materials
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0040-6031(93)80423-8
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  • 5
    Electronic Resource
    Electronic Resource
    Properties of the glyceraldehyde-3-P dehydrogenase in heterocysts and vegetative cells of cyanobacteria (1986)
    Oxford, UK : Blackwell Publishing Ltd
    FEMS microbiology letters 36 (1986), S. 0 
    Details
    ISSN: 1574-6968
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Abstract Glyceraldehyde-3-P dehydrogenase (GAPDH) in heterocysts and vegetative cells of 3 N2-fixing cyanobacteria was found to utilize both NAD+ and NADP+. The enzyme activity was enhanced by thiols (glutathione, reduced lipoic acid and dithiothreitol). GAPDH of the 3 cyanobacterial species was not activated by thioredoxin. Heterocysts have now been shown to possess all the enzymes of glycolysis and the tricarboxylic acid cycle to convert glyceraldehyde-3-phosphate (GAP) to oxoglutarate and glutamate. The GAPDH reaction is a major source for the generation of NADH, which is oxidized by a thylakoid-bound NADH:plastoquinone oxidoreductase in heterocysts.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1574-6968.1986.tb01696.x
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  • 6
    Electronic Resource
    Electronic Resource
    Radiation thermometry as an appropriate method to observe the oxide growth on metal-surfaces
    Amsterdam : Elsevier
    Thermochimica Acta 85 (1985), S. 299-302 
    Details
    ISSN: 0040-6031
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0040-6031(85)85586-6
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  • 7
    Electronic Resource
    Electronic Resource
    Insitu measurements of layer thickness during oxidation of titanium
    Amsterdam : Elsevier
    Thermochimica Acta 133 (1988), S. 299-304 
    Details
    ISSN: 0040-6031
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0040-6031(88)87173-9
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  • 8
    Electronic Resource
    Electronic Resource
    Messung des Gresamtemissionsgrades von Graphit, Molybdän, Tantal und Wolfram bei Temperaturen zwischen 1200 K und 2400 K (1971)
    Springer
    Heat and mass transfer 4 (1971), S. 133-141 
    Details
    ISSN: 1432-1181
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Description / Table of Contents: Abstract A description is given of an equipment for measuring the total normal emittance and the angular dependence of the emittance of solids in the temperature range from 1000 K to 3000 K. The emittance is determined by comparing the radiation emitted from the surface of the sample to the radiation emitted from a blackbody. The samples are small disks and are heated in vacuum by an electron gun. The temperature measurement is by a photoelectric special pyrometer in a hole drilled radially in the sample. The measured data are digitally recorded and evaluated by means of a computer program. So it is possible to make systematic measurements in a short time. The error is in the region of 3%. — Experimental results for graphite, molybdenum, tantalum and tungsten are presented.
    Notes: Zusammenfassung Es wird eine Anlage beschrieben, mit der die Temperatur- und Winkelabhängigkeit des Gesamtemissionsgrades fester Stoffe bei Temperaturen zwischen 1000 K und 3000 K gemessen werden kann. Die Anlage arbeitet nach der Methode des Strahlungsvergleiches. Dabei wird der Strahlungsfluß von der Oberfläche einer scheibenförmigen Probe mit einem Gesamtstrahlungsempfänger gemessen, der an einem schwarzen Körper kalibriert wird. Die Probe wird im Vakuum mit einer Elektronenkanone beheizt und die Temperatur in einer radialen Bohrung pyrometrisch gemessen. Digitale Datenerfassung ermöglicht Serienmessungen mit verhältnismäßig geringem Zeitaufwand, da die Meßdaten maschinell ausgewertet werden. Der maximale Fehler liegt bei 3%. — Es wird über Messungen an Graphit, Molybdän, Tantal und Wolfram berichtet.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01443671
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  • 9
    Electronic Resource
    Electronic Resource
    Denitrification and nitrogen fixation by Azospirillum (1985)
    Springer
    Archives of microbiology 141 (1985), S. 364-370 
    Details
    ISSN: 1432-072X
    Keywords: Nitrogen fixation ; Denitrification ; Associative symbiosis ; Acetylene reduction ; Nitrous oxide formation ; Azospirillum
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract A model system is described where Azospirillum and germinated wheat seeds were grown in association for a week and then assayed for nitrogen fixation (C2H2-reduction) and denitrification (N2O-formation) activities. The association performed C2H2-reduction and N2O-formation under microaerobic conditions. Both activities were measurable after already 3–5 h of incubation with substantial rates and were strictly dependent on the presence of both plants and bacteria. During the week of the growth of the association, the bacteria had lived exclusively from the carbon compounds supplied by the roots of the plants. C2H2-reduction activity by the association was more or less the same with all the Azospirillum brasilense strains, but lower with A. lipoferum and with the A. amazonense strains tested. Two nitrogenase negative mutants of Azospirillum brasilense showed virtually no activity in the association. C2H2-reduction activity was strongly dependent on the growth temperature of the association. Denitrification (N2O-formation) was high also at higher temperatures and at pH-values in the medium around 7.8 but not at neutrality and was strictly dependent on nitrate. The Azospirillum strain used strongly determined the rate of the N2O-formation in the association. It is suggested that Azospirillum may be beneficial to crops particularly under tropical conditions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00428851
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  • 10
    Electronic Resource
    Electronic Resource
    A databank for thermophysical properties of light metal alloys (1992)
    Springer
    Journal of thermal analysis and calorimetry 38 (1992), S. 781-788 
    Details
    ISSN: 1572-8943
    Keywords: databank THERSYST ; light metal alloys
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Die thermophysikalischen Eigenschaften fester Aluminium-, Magnesium- und Titanlegierungen werden aus der Literatur gesammelt und neue Messungen sind innerhalb eines europäischen Projekts (COST 507D) im Gange. In Marseille werden spezifische Wärme-kapazitäten für binäre und ternäre Aluminium- und Titanlegierungen zwischen 20° und 600°C aus dynamischer Differenzkalorimetrie und Wärmeinhaltsmessungen mit Hilfe einer Fallmethode bestimmt; daraus ergeben sich die Enthalpien, die Bildung und Auflösung metastabiler und stabiler Phasen begleiten. Alle Ergebnisse werden in die Datenbank THERSYST mit genauer Angabe der untersuchten Stoffe und der Versuchsbedingungen gespeichert. Spezielle Module erlauben die Datenauswahl, -wiedergabe und -manipulierung gemäss Verwenderkriterien.
    Notes: Abstract The thermophysical properties of solid aluminium, magnesium and titanium alloys are extracted from literature and new measurements performed within a European concerted action (CONST 507D). In Marseille, heat capacity values for binary and ternary aluminium alloys as well as for industrial aluminium and titanium alloys are assessed between 20° and 600°C from DSC and heat content measurements using a drop method; enthalpies accompanying the precipitation and dissolution of metastable and stable phases are determined. All values are stored into the databank THERSYST together with detailed description of the materials and of the experimental conditions. Special modules enable the data selection, representation and manipulation according to the user's criteria.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01979409
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