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  • 1985-1989  (29)
  • 1987  (29)
  • Chemistry  (29)
  • 1
    Electronic Resource
    Electronic Resource
    A process for protein enrichment of cassava by solid substrate fermentation in rural conditions (1987)
    New York, NY [u.a.] : Wiley-Blackwell
    Biotechnology and Bioengineering 29 (1987), S. 962-968 
    Details
    ISSN: 0006-3592
    Keywords: Chemistry ; Biochemistry and Biotechnology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: An artisanal static process for protein enrichment of cassava by solid-state fermentation, developed in laboratory and tested on pilot units in Burundi (Central Africa), provides enriched cassava containing 10.7% of dry matter protein versus 1% before fermentation. Cassava chips, processed into granules of 2-4-mm diameter, are moistened (40% water content) and steamed. After cooling to 40°C, cassava is mixed with a nutritive solution containing the inoculum (Rhizopus oryzae, strain MUCL 28627) and providing the following per 100 g dry matter: 3.4 g urea, 1.5 g KH2PO4, 0.8 g MgSO4·7H2O, and 22.7 g citric acid. For the fermentation, cassava, with ca. 60% moisture content, is spread in a thin layer (2-3 cm thick) on perforated trays and slid into an aerated humidified enclosure. The incubation lasts ± 65 h. The production of protein enriched cassava is 3.26 kg dry matter/m2 tray. The effects of the variation of the nutritive solution composition and the inoculum conservation period on the protein production are equally discussed.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bit.260290807
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  • 2
    Electronic Resource
    Electronic Resource
    Silicium-29 kern-relaxations-messungen an kieselsäurederivaten (1987)
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 188 (1987), S. 887-898 
    Details
    ISSN: 0025-116X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Derivatives of silicic acid of the type Si6O5R18 and Si8O7R18 (R = Cl, OCH3, and OC2H5) as well as bicyclic Si8O9(OC2H5)14 were isolated and characterized by 29Si NMR. The spin-lattice-relaxation and the nuclear Overhauser enhancement factor of the esters were determined between 273 and 343 K. The temperature dependency of the dipolar contribution to the longitudinal relaxation time gave an energy of activation for the segmental motion of the siloxane skeleton of about 10 kJ/mol which is independent of the kind of building unit.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/macp.1987.021880422
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Using vapor pressure information in a cubic equation of state (1987)
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 33 (1987), S. 503-505 
    Details
    ISSN: 0001-1541
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aic.690330318
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  • 4
    Electronic Resource
    Electronic Resource
    Der Einfluß benachbarter, parallel angeordneter Rohre auf die kritische Wärmestromdichte eines querangeströmten RohrsErweiterte Fassung des Vortrages von G. Meyer auf der Sitzung des GVC-Fachausschusses „Wärme- und Stoffübertragung“ 24./25. April 1986 in Bad Säckingen. (1987)
    Weinheim : Wiley-Blackwell
    Chemie Ingenieur Technik - CIT 59 (1987), S. 592-593 
    Details
    ISSN: 0009-286X
    Keywords: Kritische Wärmestromdichte ; Rohranordnung ; Sieden ; Verdampfen ; Wärmeübergang ; Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cite.330590714
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  • 5
    Electronic Resource
    Electronic Resource
    Ethanol-Herstellung mit Bakterien (1987)
    Weinheim : Wiley-Blackwell
    Chemie Ingenieur Technik - CIT 59 (1987), S. 695-700 
    Details
    ISSN: 0009-286X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Ethanol production with bacteria. Strains of Saccharomyces cerevisiae have mostly been used for the production of ethanol from sugar by yeasts. Recently it was shown that the bacterium Zymomonas mobilis has some advantages compared to yeast for the production of industrial alcohol. Compared to traditional yeast fermentation, ethanol yield is about 5% higher than with yeast, since less sugar is incorporated into cell material by this bacterium. Like yeast, Zymomonas mobilis has remarkably high ethanol tolerance which enables the bacterium to produce ethanol concentrations of more than 13 vol.-% from sugar solutions of appropriate concentration. Investigations of the spectrum of lipids present have shown that this bacterium contains large quantities of hopanoids which are presumably of significance for the stabilization of cell membranes in the presence of ethanol. Since the cost of the sugar greatly influences the profitability fraction formed in the production of glucose syrup from wheat flour was investigated. It was shown that after enzymatic saccharification of this waste starch the glucose was efficiently fermented to ethanol by Zymomonas mobilis. It is planned to broaden the substrate spectrum of Zymomonas mobilis by gene cloning techniques so that in future pentoses, e. g. xylose or arabinose, can also be fermented to ethanol by this organism.
    Additional Material: 11 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cite.330590904
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  • 6
    Electronic Resource
    Electronic Resource
    Cyclische Kieselsäurederivate (1987)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 548 (1987), S. 193-203 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Cyclic Silicic Acid DerivativesBy reaction of SiCl4 with oxygen at elevated temperatures a number of chlorsiloxanes consisting of more or less fused rings can be prepared of which those components of low molecular weight can be separated by combining distillation and crystallization. Methyl and ethyl esters of silicic acids are obtained by reaction with methyl or ethyl nitrite, resp. The compounds are characterized by silicon n.m.r. and mass spectroscopy.
    Notes: Bei der Reaktion von SiCl4 mit Sauerstoff bei erhöhter Temperatur entstehen eine große Anzahl von Chlorsiloxanen, die aus mehr oder weniger kondensierten Ringen bestehen. Aus dem niedermolekularen Anteil können eine Reihe von Spezies durch die Kombination von Destillation und Kristallisation isoliert werden. Durch Umsetzung mit Methyl- bzw. Ethylnitrit lassen sich daraus die entsprechenden Ester der Kieselsäuren darstellen. Die Verbindungen werden durch 29Si-Kernresonanz und in gewissem Grade durch die Massenspektrometrie charakterisiert.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19875480522
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  • 7
    Electronic Resource
    Electronic Resource
    Polymer-Legierungen (1987)
    Weinheim : Wiley-Blackwell
    Chemie in unserer Zeit 21 (1987), S. 59-69 
    Details
    ISSN: 0009-2851
    Keywords: Chemistry ; Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Werkstoffe auf der Basis von synthetischen oder natürlichen Polymeren sind in vielen Bereichen des zivilisierten Lebens selbstverständlich geworden. Das liegt unter anderem an den typischen Eigenschaften der Polymeren, z. B. leichte Formgebung, geringes spezifisches Gewicht und oft niedriger Preis, die ihnen im Vergleich zu den „klassischen“ Werkstoffen wie Holz, Metall und Keramik Vorteile verschaffen.Besonders auf dem Gebiet der Konstruktionswerkstoffe verdrängen deshalb Polymere andere Werkstoffe aus immer mehr Anwendungsbereichen. So ist z. B. die Innenausstattung von Personenkraftwagen in den letzten Jahren fast ausnahmslos eine Domäne der polymeren Werkstoffe geworden. Der vorliegende Artikel über Grundlagen und Anwendungen von „Polymer-Legierungen“ ist der erste einer Serie von Aufsätzen, die sich unter der gemeinsamen überschrift „Polymere Werkstoffe“ mit den vielseitigen Aspekten dieser Werkstoffklasse befassen werden und in zwangloser Folge erscheinen sollen.
    Additional Material: 15 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/ciuz.19870210205
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  • 8
    Electronic Resource
    Electronic Resource
    Prediction of protein-ligand interactions: The complex of porcine pancreatic elastase with a valine-derived benzoxazinone (1987)
    New York : Wiley-Blackwell
    Biopolymers 26 (1987), S. 1207-1225 
    Details
    ISSN: 0006-3525
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Prior to availability of the crystal structure of the complex, we evaluated models of the complex between porcine pancreatic elastase and a t-Boc-Val-derived benzoxazinone inhibitor. Models of the noncovalent and covalent complex were generated using computer graphics and each model was subjected to energy minimization using molecular mechanics. After the crystal structure became available, we found that the model with the lowest energy was in good agreement with the crystal structure, except for the position of the His57 side chain. Permissible conformations of the inhibitor were based on information from x-ray crystal structures and an earlier conformational energy investigation of t-Boc-amino acids. We did not, however, limit ourselves to these conformations. The conformation of the inhibitor in the lowest energy model and crystal structure, was not similar to any of the minimum-energy conformations of t-Boc-amino acids. This suggests that limiting proposed binding modes only to the lowest energy conformations of a ligand (prior to binding) may sometimes unfairly bias the procedure.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bip.360260802
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  • 9
    Electronic Resource
    Electronic Resource
    Revised Structure of the Fungal Germination Self-Inhibitor Gloeosporone (1987)
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 70 (1987), S. 281-291 
    Details
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Gloeosporone, the germination self-inhibitor from the fungus Colletotrichum gloeosporioides f.sp. jussiaea, is shown by spectroscopic data and X-ray analysis to have the constitution and relative configuration as shown in Formula 2 (either (1S,6R,12R)-1-hydroxy-6-pentyl-5,15-dioxabicyclo[10.2.1]pentadecan-4,13-dione or its enantiomer), rather than the previously assigned constitution 1.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/hlca.19870700203
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  • 10
    Electronic Resource
    Electronic Resource
    Synthesis and Copper(I) Complexes of a Series of 9- to 13-Membered N3 Macrocycles (1987)
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 70 (1987), S. 680-689 
    Details
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Eight cyclic triamines with ring sizes between 9 and 13 were synthesized by the p-toluenesulfonate method. The open-chain triamines bis(2-aminoethyl)amine (dien) and bis(3-aminopropyl)amine (diprop) were used as starting materials. In some cases, the corresponding dimeric cyclic hexaamines have been isolated and characterized as major by-products. The complexation of Cu(I) by the triamines has been studied potentiometrically in CH3CN/H2O. All ligands L form ternary complexes [Cu(CH3CN)L]+. The corresponding association constants vary between 1011 and 107, decreasing with increasing ring size. In addition, complexes [Cu(CH3CN)yLH]2+, y = 1 or 2, are found as less important species with maximum concentrations of 7 to 50%.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/hlca.19870700318
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