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  • 1
    Electronic Resource
    Electronic Resource
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 59 (1976), S. 387-396 
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: A Synthesis of vitamin A has been achieved by alkylating a β-ionylidene-ethyl (C15) aromatic sulfone with 1-acetoxy-3-chlormethyl-2-butene (C5) followed by elimination of the corresponding sulfinic acid.
    Additional Material: 2 Tab.
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  • 2
    Electronic Resource
    Electronic Resource
    New York, NY : Wiley-Blackwell
    International Journal of Chemical Kinetics 8 (1976), S. 23-24 
    ISSN: 0538-8066
    Keywords: Chemistry ; Physical Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    New York, NY [u.a.] : Wiley-Blackwell
    Biotechnology and Bioengineering 18 (1976), S. 545-580 
    ISSN: 0006-3592
    Keywords: Chemistry ; Biochemistry and Biotechnology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Protein solubility can be adequately represented by the classical Cohn equation for the salting-out of alcohol dehydrogenase and fumarase from clarified yeast homogenate with ammonium sulfate. However, the constant β in this equation is a function of the contacting procedure employed. The kinetics of continuous salting-out were similar for alcohol dehydrogenase and fumarase. The overall rate equation for precipitation had a variable order which was high initially, up to 3.1, but approached unity on completion of precipitation. This was followed by a partial resolution stage which was first order with respect to the concentration driving force. Precipitate particle size was estimated as 0.5 to 5 μm with continuous flow precipitation producing the largest particles.
    Additional Material: 18 Ill.
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  • 4
    Electronic Resource
    Electronic Resource
    New York, NY [u.a.] : Wiley-Blackwell
    Biotechnology and Bioengineering 18 (1976), S. 1496-1496 
    ISSN: 0006-3592
    Keywords: Chemistry ; Biochemistry and Biotechnology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: No Articles.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    New York, NY [u.a.] : Wiley-Blackwell
    Biotechnology and Bioengineering 18 (1976), S. 1669-1677 
    ISSN: 0006-3592
    Keywords: Chemistry ; Biochemistry and Biotechnology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: The black yeast-like fungus Rhinocladiella mansonii NRRL Y-6272 elaborates an extracellular polysaccharide composed of N-acetyl D-glucosamine and N-acetyl D-glucosaminuronic acid residues in a 2:1 molar ratio. Production of this polymer was studied in 300 ml flasks and 20 liter fermentors. On the basis of glucose utilized, 13% conversion to polymer was obtained in four days at 25°C in medium containing yeast autolysate paste, K2HPO4, MgSO4, ZnSO4, L-asparagine or urea, and D-glucose. Nitrogen sources, aeration, agitation, temperature, and salts affected yields.The polymer in diluted fermentation broths was precipitated with ethanol in the presence of an electrolyte and collected by centrifugation. The viscosities of aqueous resolutions containing 1 and 1.5% of the polymer were 9400 cP and 21,500 cP, respectively.
    Additional Material: 2 Ill.
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  • 6
    Electronic Resource
    Electronic Resource
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 27 (1976), S. 568-572 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Korrelation zwischen dem elektrochemischen Verhalten von Kupferrohren und rotierenden Kupferzylindern in künstlichem MeerwasserEine Laboratoriumsapparatur zur Simulierung der in einem Wärmeaustauscher ablaufenden Korrosionsvorgänge wurde gebaut und ermöglicht sehr genaue elektrochemische Messungen. Die Ergebnisse dieser Messungen wurden mit den Werten verglichen, die sich bei Verwendung von Meßzellen einfacher geometrischer Formen ergaben. Zwischen den Ergebnissen der elektrochemischen Messungen am rotierenden Zylinder und im Inneren einer rohrförmigen Elektrode (die von Elektrolyten durchflossen wird) wurde eine mathematische Beziehung erhalten, welche die folgenden Schlüsse ermöglicht: 1Die strömungsdynamischen Bedingungen in den beiden untersuchten elektrochemischen Zellen sind in elektrochemischer Hinsicht miteinander vergleichbar, wenn die Dicke der Diffusionsgrenzschicht in beiden Fällen die gleiche ist.2Es ist möglich, Meßzellen einfacher geometrischer Form, wie z. B. einen rotierenden Zylinder, zur Untersuchung der Korrosion in elektrolytdurchflossenen Rohren oder Wärmeaustauschern zu verwenden; dabei ergibt sich auch bei hoher Aggressivität des Mediums (wie im Falle des künstlichen Meerwassers) eine Abhängigkeit von den strömungsdynamischen Bedingungen.
    Notes: The experimental conditions corresponding to those which are ascertained in a heat exchanger have been reconstructed in laboratory, with the possibility of performing very accurate electrochemical measurements. The electrochemical results have been compared with those derived from the use of simple geometric electrochemical cells. A mathematical correlation has been obtained between the electrochemical measurements obtained on a rotating cylinder and on the interior surface of a tube-shaped electrode, through which a solution flows. It has been concluded that: (1)the fluid-dynamic conditions, in the two electro-chemical cells we investigated, are comparable between each other, by an electrochemical point of view, when identical values of thickness of the limiting diffusion layers are obtained in the two cases.(2)it is possible to utilize simple cell geometries, such as the one employing a rotating cylinder, to investigate on the corrosion problems which happen in pipes or heat exchangers, in which an electrolyte flows, (even if its aggressiveness is as high as synthetic sea water is) as a function of fluid-dynamic conditions.
    Additional Material: 9 Ill.
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  • 7
    Electronic Resource
    Electronic Resource
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 27 (1976), S. 865-870 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Schwingungskorrosionsverhalten von Armco-Eisen als Funktion der WärmebehandlungDie Autoren haben ein Prüfgerät für Schwingungskorrosion entwickelt, das auf einfache Weise vielen Anforderungen bei dieser spezifischen Prüfung entspricht. Im einzelnen kann die Zeitabhängigkeit des Spannung-Dehnung-Verhaltens für jeden Punkt der Probe ermittelt werden, die Belastung kann verändert und geregelt werden, auch elektrochemische Messungen lassen sich leicht durchführen und schließlich wird auch hohe Reproduzierbarkeit erreicht. Die Probe wird dabei als Hebelprobe eingesetzt. Die in der Arbeit vorgelegten Ergebnisse betreffen die Veränderungen im Gefüge von Armco-Eisen im Anschluß an zwei Wärmebehandlungsarten, und zwar A. Erhitzen im Vakuumofen auf 760°C, 2 h Haltezeit, Abschrecken in Wasser auf 20°C (in einigen Fällen wurde auch Natriumchloridlösung oder eine wässerige Ölemulsion verwendet)B. Erhitzen im Vakuumofen auf 760°C, eine Stunde Haltezeit, dann auf 925°C, 4 h Haltezeit, Abschrecken wie unter (A).Im Anschluß an diese beiden Wärmebehandlungen ist Sensibilisierung bzw. Unempfindlichkeit gegen interkristalline Korrosion und da mit auch gegen Schwingungsrißkorrosion festzustellen.
    Notes: A corrosion fatigue testing device is presented which satisfies in a simple way many needs of this kind of research. In particular, the behaviour of stresses and strains vs. time is known at every point of the specimen; load may be varied and controlled; electrochemical measures are easily obtained; reproducibility is assured. The specimen acts as a cantilever beam. Results are presented and discussed concerning alterations in the structure of Armco iron as a consequence of the following two heat treatments: A. heating in a vacuum furnace at 760°C for two hours, quenching in water (some experiments have been performed quenching in NaCl solution or in aqueous oil emulsion) at 20 °C.B. heating in a vacuum furnace at 760°C for one hour, then at 925°C for four hours, quenching under the same conditions as in A.Sensitization and protection with respect to intergranular attack and consequently to the rate of fatigue corrosion cracking respectively follow the two above mentioned heat treatments.
    Additional Material: 13 Ill.
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  • 8
    Electronic Resource
    Electronic Resource
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 22 (1976), S. 1156-1156 
    ISSN: 0001-1541
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 22 (1976), S. 1090-1096 
    ISSN: 0001-1541
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: The presence of internal circulation in forming liquid drops has a significant effect on mass transfer rates. For the systems studied, no circulation was observed below a Reynolds number of 9.7. For Reynolds numbers between 9.7 and 34.4, transition from zero circulation to complete circulation during the entire drop formation period occurred. In studies on the rate of mass transfer from fixed volume drops with forced internal circulation, increases in mass transfer rates were found at Reynolds numbers which corresponded to those observed for the development of internal circulation patterns within the drop.
    Additional Material: 6 Ill.
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  • 10
    Electronic Resource
    Electronic Resource
    Chichester : Wiley-Blackwell
    Biological Mass Spectrometry 3 (1976), S. 166-171 
    ISSN: 1052-9306
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The mass spectra of peracetylated daunorubicin, N-octanoyl-, N-dodecanoyl- and N-(N'-dodecanoylglycyl)daunorubicin, and perdeuteroacetylated N-dodecanoyldaunorubicin were analyzed. Major fragmentation pathways were suggested and ion compositions were determined by high resolution measurements.
    Additional Material: 3 Tab.
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