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  • 1
    Electronic Resource
    Electronic Resource
    Synthesis and lysis of formate by immobilized cells of Escherichia coli (1992)
    New York, NY [u.a.] : Wiley-Blackwell
    Biotechnology and Bioengineering 39 (1992), S. 775-780 
    Details
    ISSN: 0006-3592
    Keywords: formate ; Escherichia coli ; formate hydrogenlyase ; cell immobilization ; Chemistry ; Biochemistry and Biotechnology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Formate hydrogenlyase (FHL) activity was induced in a strain of Escherichia coli S13 during anaerobic growth in yeast extract-tryptone medium containing 100 mM formate. The cells obtained at the optimum growth phase were immobilized in 2.5% (w/v) agar gel when 50-60% of the whole cell FHL activity was retained. The immobilized FHL system had good storage stability and recycling efficiency. In the lysis of formate, an increase of formate concentration to 1.18M increased QH2 (initial) value of the immobilized cell, and subsequently cells, hydrogen evolution, in general, ceased after 6 to 8 of incubation, resulting in incomplete lysis of formate. Presence of small amount of glucose (28 mM) was more or less quantitatively lysed with concomitant disappearence of glucose from the medium. Synthesis of formate from hydrogen and bicarbonate solution by the immobilized cells was also characterized. Presence of glucose (10 mM) in 50 mM bicarbonate solution stimulated formate synthesis by immobilized cells. The pH optimum range, Km, and specific activity of the immobilized cells for the lysis of formate were 6.8-7.2 0.4M, and 66 mL/g cell-h, respectively. The cells could fix hydrogen to the extent of 24.4% (w/w) of its own wet cell mass in a 72-h reaction cycle. Potentiality of the immobilized FHL system for biotechnological exploitation was discussed.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bit.260390710
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  • 2
    Electronic Resource
    Electronic Resource
    Über Thioacyl-isocyanate, XV. Reaktionen mit nucleophilen C-Verbindungen (1981)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 114 (1981), S. 2713-2722 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Thioacyl Isocyanates, XV. Reaction with Nucleophilic C-CompoundsReaction of thioacyl isocyanates with sodium ethylmalonate and related compounds affords 1, existing as amides or tautomers; they are suitable as starting material for the synthesis of 2,3,4.  -  Thiobenzoyl isocyanate reacts with nucleophilic alkenes and alkynes to form unsaturated carbonamides (5,6,7), cycloadducts (8,9,12,13,15,16), and cycloadducts minus HX (10,11,13,14); dependance of these results on constitution (conformation) is disussed. Type, number, and position of donor groups in the alkenes determine the observed relative rates of cycloaddition.
    Notes: Die Reaktion von Thioacyl-isocyanaten mit Natriummalonester und verwandten Verbindungen führt zu den Addukten 1, die teils als Amide, teils als tautomere Verbindungen vorliegen. Sie sind für weiter führende Synthesen, z. B. zu 2,3,4, geeignet.- Thiobenzoyl-isocyanat ergibt mit nucleophilen Alkenen und Alkinen alternativ ungesättigte Carbonamide (5,6,7), Cycloaddukte (8,9,12,13,15,16) oder Cycloaddukte minus HX(10,11,13,14); auf die Abhängigkeit des Reaktionsergebnisses von der Konstitution (Konformation) wird eingegangen. Für die Geschwindigkeit der Cycloaddition wird eine Folge angegeben, die die Bedeutung von Art, Zahl und Stellung der Donorgruppe des Alkens deutlich macht.
    Additional Material: 2 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19811140805
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  • 3
    Electronic Resource
    Electronic Resource
    Über Thioacyl-isocyanate, XI. Verfahren zu ihrer Herstellung aus Dithiazolonen (1975)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 108 (1975), S. 3066-3070 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Thioacyl Isocyanates, XI. Preparation from Dithiazolones1,2,4-Dithiazol-3-ones (1) react with triphenylphosphine at low temperature to give thioacyl isocyanates (2) almost quantitatively. By this way some thermally labile compounds 2 were obtained, which could not be prepared from thiazoline-diones.
    Notes: 1,2,4-Dithiazol-3-one (1) bilden mit Triphenylphosphin schon bei niederer Temperatur praktisch quantitativ Thioacyl-isocyanate (2). Auf diese Weise erhielt man einige Verbindungen 2, die wegen mangelnder thermischer Stabilität oder aus anderen Gründen aus Thiazolin-dionen nicht darstellbar waren.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19751080926
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  • 4
    Electronic Resource
    Electronic Resource
    Über Thioacyl-isocyanate, XII1) Herstellung und Vergleich von aliphatischen, aromatischen und heteroaromatischen Verbindungen der Reiche (1981)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 114 (1981), S. 549-563 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Thioacyl Isocyanates, XII1) Preparation and Comparison of Aliphatic, aromatic, and Heteroaromatic CompoundsMany 1,2,4-dithiazol-3-ones(2), especially with aliphatic and heterocyclic substituents, and some thiazoline-4, 5-diones (3) were synthesized from thioamides (1). Extrusion of sulfur or carbon monoxide, respectively, afforded the thioacyl isocyanates 5. Reactions with themselves (fragmentation, dimerization) and some cycloadditions with imines, norbornene, morpholinocyclohexene were investigated and compared. Thioacyl isocyanates with strong electron attracting groups are more stable and less prone to cycloadditions than the others.
    Notes: Viele 1,2,4-Dithiazol-3-one(2), vorwiegend mit aliphatischen und heterocyclischen Resten, sowie einige Thiazolin-4,5-dione (3) wurden aus entsprechenden Thioamiden (1) hergestellt und unter Schwefel-bzw. Kohlenmonoxid-Extrusion in Thioacyl-isocyanate 5 verwandelt. Deren Selbstreaktionen (Fragmentierung, Dimerisierung) und einige Cycloadditionen mit Iminen, Norbornen, Morpholinocyclohexen wurden vergleichend untersucht. Thioacyl-isocyanate mit stark elektronenziehenden Resten sind deutlich stabiler und bei Cycloadditionen reaktionsträger als die anderen.
    Additional Material: 3 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19811140216
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  • 5
    Electronic Resource
    Electronic Resource
    Über das “2-Pyridylthiocarbonyl-isocyanat“1,2) (1981)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 114 (1981), S. 808-809 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: On “2-Pyridylthiocarbonyl Isocyanate”1,2)Physical properties demonstrate that the title compound is a zwitterionic bicyclic species (2); its chemical behaviour is like an isocyanate of low activity.
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19811140239
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  • 6
    Electronic Resource
    Electronic Resource
    Über Thioacyl-isocyanate, XIV1) Reaktion mit 2-Bromethanol zu Oxazolon-und 1,5,3-Oxathiazepinon-Derivaten (1981)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 114 (1981), S. 1972-1975 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Thioacyl Isocyanates, XIV1) Reaction with β-Bromethanol to Derivatives of Oxazolones and 1,5,3-OxathiazepinonesThioacyl isocyanates 1, R = Alkyl and Aryl, react with 2-bromethanol via urethanes 2 normally to N-thioacyloxazolidinones 4, in case of R = tert-butyl to the 1,5,3-oxathiazepion 5.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19811140536
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  • 7
    Electronic Resource
    Electronic Resource
    Value of δ for methyl acrylate (1956)
    Hoboken, NJ : Wiley-Blackwell
    Journal of Polymer Science 22 (1956), S. 559-560 
    Details
    ISSN: 0022-3832
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1956.1202210225
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  • 8
    Electronic Resource
    Electronic Resource
    Mechanism of initiation of polymerization by ferric acetylacetonate (1976)
    New York : Wiley-Blackwell
    Journal of Polymer Science: Polymer Letters Edition 14 (1976), S. 19-22 
    Details
    ISSN: 0360-6384
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1976.130140104
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  • 9
    Electronic Resource
    Electronic Resource
    Biodegradation of gelatin-g-poly(ethyl acrylate) copolymers (1981)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 26 (1981), S. 3633-3641 
    Details
    ISSN: 0021-8995
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Gelatin-g-poly(ethyl acrylate) copolymers were prepared in an aqueous medium, using K2S2O8 initiator. The composition of the graft copolymers was dependent upon temperature and duration of the reaction. The number of grafting sites was small and molecular weight of the grafted poly(ethyl acrylate) branches was high. Three copolymer samples with grafting efficiencies of 33.3%, 61.0%, and 84.0%, were tested for their microbial susceptibility in a synthetic medium employing a mixed inoculum of Bacillus subtilis, Pseudomonas aeruginosa, and Serratia marcescens and the percent weight losses were 12%, 10.1%, and 6.0%, respectively, after 6 weeks of incubation. The extent of degradation seems to decrease with increasing grafting efficiency. There was initial rapid weight loss accompanied by the exponential increase in bacterial population and pH of the culture medium during the first week. The nitrogen analysis also showed the utilization of the polymer. A parallel set of experiments, carried out by employing the samples as the only source of both carbon and nitrogen, showed a marginal but definite increase in the utilization of the polymer.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1981.070261111
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  • 10
    Electronic Resource
    Electronic Resource
    Biodegradation of gelatin graft copolymers. III (1985)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 30 (1985), S. 609-619 
    Details
    ISSN: 0021-8995
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Gelatin-g-poly(methyl acrylate) and gelatin-g-poly(acrylonitrile) copolymers were prepared in an aqueous medium using K2S2O8 initiator. A plausible mechanism has been put forward for the observed grafting behavior of monomers. Gelatin-g-PAN showed a greater resistance to mixed bacterial inolucum compared to gelatin-g-PMA samples. The rate of degradation decreased with the increase in grafting efficiency. A parallel set of experiments carried out by employing the samples as the only source of both carbon and nitrogen showed a marginal but definite increase in the utilization of the polymer. The nitrogen analysis also showed the utilization of the polymer. Scanning electron micographs of the polymer films do show extensive pitting after microbiological testing.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1985.070300213
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