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  • Inorganic Chemistry  (42)
  • Biochemistry and Biotechnology  (17)
  • Wiley-Blackwell  (59)
  • National Academy of Sciences
  • 1970-1974  (59)
  • 1950-1954
  • 1973  (59)
  • 1950
Collection
Keywords
Publisher
  • Wiley-Blackwell  (59)
  • National Academy of Sciences
Years
  • 1970-1974  (59)
  • 1950-1954
Year
  • 1
    Electronic Resource
    Electronic Resource
    Steady state multiplicity and stability of enzymatic reaction systems (1973)
    New York, NY [u.a.] : Wiley-Blackwell
    Biotechnology and Bioengineering 15 (1973), S. 1131-1145 
    Details
    ISSN: 0006-3592
    Keywords: Chemistry ; Biochemistry and Biotechnology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Several techniques for investigating the multiplicity and stability of open isothermal enzymatic reactors are discussed and some of the pitfalls in previous thinking pointed out. The example which is used to illustrate these methods exhibits several interesting features. Among these is the existence of a stable oscillatory state which surrounds a unique steady state which is asymptotically stable to certain finite disturbances.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bit.260150611
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  • 2
    Electronic Resource
    Electronic Resource
    New methods for binding enzyme molecules into a water-insoluble matrix: Properties after insolubilization (1973)
    New York, NY [u.a.] : Wiley-Blackwell
    Biotechnology and Bioengineering 15 (1973), S. 359-375 
    Details
    ISSN: 0006-3592
    Keywords: Chemistry ; Biochemistry and Biotechnology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: New methods of crosslinking enzyme molecules inside a matrix with or without an inactive protein are described. Enzyme activity yields range between 30 and 80% of the activity of the untreated preparations. Even fragile enzyme systems, for instance those using mobile cofactors, can be efficiently immobilized. Increased resistance towards heat denaturation and proteolysis results.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bit.260150211
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  • 3
    Electronic Resource
    Electronic Resource
    Conversion of benzylpenicillin to 6-aminopenicillanic acid in a batch reactor and continuous feed stirred tank reactor using immobilized penicillin amidase (1973)
    New York, NY [u.a.] : Wiley-Blackwell
    Biotechnology and Bioengineering 15 (1973), S. 13-25 
    Details
    ISSN: 0006-3592
    Keywords: Chemistry ; Biochemistry and Biotechnology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: A rate equation has been derived to describe the hydrolysis of benzylpenicillin to 6-aminopenicillanic acid by penicillin amidase. The integrated from of the rate equation has been shown to predict satisfactorily the progress of the reaction in a batch reactor using either soluble or immobilized penicillin amidase. The rate equation was also used to predict the performance of a continuous feed stirred tank reactor containing immobilized enzyme. There was good agreement with experimental measurements.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bit.260150103
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  • 4
    Electronic Resource
    Electronic Resource
    Beiträge zur Chemie des Schwefels. 113. Der Einfluß von Verunreinigungen auf die elektrische Leitfähigkeit des flüssigen Schwefels (1973)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 399 (1973), S. 77-86 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Contributions to the Chemistry of Sulphur. 113. The Effect of Impurities on the Electrical Conductivity of Molten SulphurThe electrical conductivity of molten sulfur in the range up to 200°C was analysed on samples which were specially purified as well as doped with paraffin, phenanthrene, benzidine, benzil, bromine, and iodine.The current flow below 160°C results from electrophoretically migrating impurities and by interaction with the impurities ionized molecules, whereas at higher temperatures conduction is caused by electrons. At the minimum of viscosity of the molten sulfur (154,5°C) the conductivity shows a maximum, which is shifted by impurities especially halogens up to 10°C towards lower temperatures. The relation between the electrophoretic conduction in the sulfur melt and the viscosity, which determines the mobility of the charged particles, is discussed.
    Notes: Die elektrische Leitfähigkeit des flüssigen Schwefels im Temperaturbereich bis 200°C wurde an nach verschiedenen Verfahren gereinigten und an mit Paraffin, Phenanthren, Benzidin, Benzil, Methandithiol sowie Brom und Jod dotierten Proben untersucht. Während bei höheren Temperaturen Elektronenleitung vorliegt, erfolgt der Ladungstransport unterhalb von 160°C, und zwar auch bei den reinsten heute darstellbaren Schwefelproben, durch elektrophoretisch wandernde Verunreinigungsteilchen bzw. In Wechselwirkung mit den Verunreinigungen ionisierte Schwefelmolekeln. Im Bereich des Viskositätsminimums der Schwefelschmelze (154,5°C) besitzt die Leitfähigkeit ein Maximum, das jedoch durch Beimengungen, insbesondere von Halogenen, auf bis zu 10°C niedrigere Temperaturen verschoben wird. Der Zusammenhang zwischen der elektrophoretischen Leitung im Schwefel und der die Beweglichkeit der geladenen Teilchen bestimmenden Zähigkeit der Schmelze wird diskutiert.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19733990111
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  • 5
    Electronic Resource
    Electronic Resource
    Preparation and study of new Complex Halogeno Acids of Iron(III) (1973)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 399 (1973), S. 345-348 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Darstellung und Untersuchung neuer komplexer Halogenosäuren des EisensEs wird über die Darstellung von gemischten Chloro-Bromo-Säuren von Eisen(III) und über einige ihrer Eigenschaften berichtet.
    Notes: The preparation of three simple and mixed halogeno acids of iron(III) is reported, and some physical and chemical properties as well as their I.R.-spectra are described.
    Additional Material: 2 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19733990309
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  • 6
    Electronic Resource
    Electronic Resource
    Die Darstellung von Schwefeltetrafluorid aus den Elementen bei tiefer Temperatur in einem inerten Lösungsmittel (1973)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 401 (1973), S. 53-56 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: The Preparation of Sulphur Tetrafluoride from the Elements at low Temperature in an Inert SolventPure sulphurtetrafluoride cna be prepared by the fluorination of elemental sulphur in CCl3F at -78°C in high yields.
    Notes: Schwefeltetrafluorid läßt sich in reiner Form in einer CCl3F-Lösung durch direkte Fluorierung von elementarem Schwefel bei -78°C in hoher Ausbeute darstellen.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19734010108
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  • 7
    Electronic Resource
    Electronic Resource
    Asterane, IX. Synthese und Struktur von Tetramethyltetraasteranen (1973)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 106 (1973), S. 150-156 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Asteranes, IX. Synthesis and Structure of Tetramethyltetraasteranes1,2,7,8- and 1,4,5,8-tetramethylpentacyclo[6.4.0.02.7.04.11.05.10.]dodecane (3 and 6) are obtained by Wolff-Kishner reduction of the cage dimers from 2,3- and 2,5-dimethyl-p-benzoquinone via the tetrahydrazones 2 and 5. The structure of 6 is confirmed by X-ray-diffraction analysis.
    Notes: Wolff-Kishner-Reduktion überführt die Käfigdimeren aus 2,3- und 2,5-Dimethyl-p-benzochinon in 1,2,7,8- und 1,4,5,8-Tetramethylpentacyclo[6.4.0.02.7.04.11.05.10]dodecan (3 und 6), wobei es notwendig ist, die Tetrahydrazone 2 und 5 zu isolieren. Die Struktur von 6 wird durch Röntgenanalyse bestätigt.
    Additional Material: 3 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19731060118
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  • 8
    Electronic Resource
    Electronic Resource
    Protonenresonanz-Spektroskopie ungesättigter Ringsysteme, XVIIIXVII. Mitteil.: D. Cremer und H. Günther, Liebigs Ann. Chem. 763, 87 (1972). Ein Benzolimin-1H-Azepin-Gleichgewicht (1973)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 106 (1973), S. 984-995 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Proton Resonance Spectroscopy of Unsaturated Ringsystems, XVIII.XVII. Mitteil.: D. Cremer und H. Günther, Liebigs Ann. Chem. 763, 87 (1972) A Benzeneimine-1 H-Azepine EquilibriumThe temperature dependence of the 1H n.m.r. spectrum of 4,5-bis(methoxycarbonyl)-3,6-diphenyl-1-p-tosyl-1H-azepine (11) is described. The results are interpreted on the basis of a benzeneimine-1H-azepine valence tautomerism (equilibrium distribution at room temperature ca. 3 : 97).
    Notes: Es wird über die Temperaturabhängigkeit des 1H-NMR-Spektrums von 4,5-Bis(methoxycarbonyl)-3,6-diphenyl-1 -p-tosyl-1H-azepin (11) berichtet. Die Befunde werden im Sinne einer Benzolimin-1H-Azepin-Valenztautomerie (Gleichgewichts-Verteilung bei Raumtemperatur ca. 3 : 97) interpretiert.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19731060332
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  • 9
    Electronic Resource
    Electronic Resource
    Reaktionen an Indolderivaten, XIX. Stereoselektive Cyclisierungen in der Indolreihe (1973)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 106 (1973), S. 3106-3118 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Reactions with Indole Derivatives, XIX. Stereoselective Cyclisations in the Indole SeriesSubstituted 1-allylnorharman derivatives rearrange after reaction with formaldehyde via a char-ge-induced sigmatropic process and subsequently cyclise stereoselectively to yield substituted indoloquinolizidines. The constitution and configuration of the reaction products is described.
    Notes: Substituierte 1 -Allylnorharmanderivate unterliegen nach Umsetzung mit Formaldehyd einer raschen ladungsinduzierten sigmatropen Umlagerung und cyclisieren anschließend stereo-selektiv zu substituierten Indolochinolizidinen. Die Konstitution und die Konfiguration der Reaktionsprodukte wird beschrieben.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19731061003
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  • 10
    Electronic Resource
    Electronic Resource
    Large scale isolation of choline acetyltransferase from ox brains (1973)
    New York, NY [u.a.] : Wiley-Blackwell
    Biotechnology and Bioengineering 15 (1973), S. 271-283 
    Details
    ISSN: 0006-3592
    Keywords: Chemistry ; Biochemistry and Biotechnology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: A process for the large-scale isolation of choline acetyltransferase from ox brain has been developed, by scaling-up an existing laboratory method. 20% of the enzyme was obtained from 17 kg of brain tissue with a 50-fold purification.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bit.260150205
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