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  • 1
    Electronic Resource
    Electronic Resource
    The effect of mercuric ion on the DNA-methylene blue complex (1971)
    New York : Wiley-Blackwell
    Biopolymers 10 (1971), S. 2625-2628 
    Details
    ISSN: 0006-3525
    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/bip.360101224
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  • 2
    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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  • 3
    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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  • 4
    Electronic Resource
    Electronic Resource
    Chain transfer of alcohols in the polymerization of acrylic esters (1982)
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 183 (1982), S. 1467-1472 
    Details
    ISSN: 0025-116X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Transfer constants were determined from the thermal polymerization of methyl, ethyl, and butyl acrylates for methyl, ethyl, propyl, and isopropyl alcohols at 80 °C, utilising “mixedsolvent” systems wherever necessary. It was observed that the chain transfer constant for alcohols is not much affected by lengthening of the ester group in the acrylates, and the reactivity of the solvent is enhanced by an increased substitution at the α-carbon atom in the alkyl group.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/macp.1982.021830611
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  • 5
    Electronic Resource
    Electronic Resource
    Preparation of graft and block copolymers by means of amide linkages (1975)
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 176 (1975), S. 3179-3183 
    Details
    ISSN: 0025-116X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: Ausgehend von der Reaktion zwischen Säurechloriden und Aminen, wurden zwei Techniken zur Herstellung von Propf- und Blockcopolymeren entwickelt. Bei der ersten Methode wurde ein Polymethylmethacrylat, (PMMA), das Chlorformylgruppen enthielt mit 2,2′-Azodiisobutyramidin (1) oder 2,2′-Azobis[2-(2-imidazolin-2-yl)propan] (2) zu cinem polymeren Initiator umgesetzt, der bei der thermischen Aktivierung in Gegenwart von Acrylamid - je nach der Position der Chlorformylgruppen an der PMMA HauptketteProp+oder Blockcopolymere ergab. Bei der zweiten Methode wurde ein PMMA, das eine endständige Chlorformylgruppe enthielt, mit einem Polyacrylnitril, das zwei Amidin-Endgruppen enthielt, zu einem Blockcopolymeren umgesetzt.
    Notes: Based on the reaction between acid chlorides and amines, two techniques were developed to prepare graft and block copolymers. In the first method poly(methyl methacrylate), (PMMA), containing chloroformyl groups was reacted with 2,2′-azodiisobutyramidine (1) or 2,2′-azobis[2-(2-imidazolin-2-yl)propane] (2) to give a polymeric initiator which, on thermal activation in the presence of acrylamide, produced graft and block copolymers, according to the position of the chloroformyl group on the PMMA backbone. In the second method, PMMA containing one terminal chloroformyl group was directly reacted with polyacrylonitrile containing two terminal amidine groups to produce a block copolymer.
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/macp.1975.021761104
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  • 6
    Electronic Resource
    Electronic Resource
    Biodegradation of gelatin graft copolymers. IV (1985)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 30 (1985), S. 915-924 
    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 graft copolymers of different compositions were tested for microbial susceptibility in a synthetic medium with pure cultures of Pseudomonas aeruginosa, Bacillus subtilis, and Serratia marcescens. The percent weight losses were recorded over 6 weeks of incubation period in nitrogen-free and nitrogen-rich media. The relationship between [log(rate)] during the first week of the test period and composition of the grafted samples showed a linear behavior. There was no difference in the aggressivity of these bacterial strains. Nitrogen analysis data and pH measurements of the media seem to reinforce our earlier observations. Soil burial tests also indicate degradation of polymer samples under natural weathering conditions. This article also summarizes the salient features of our series of investigations.
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1985.070300303
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  • 7
    Electronic Resource
    Electronic Resource
    Polymerization of methyl methacrylate with cupric laurate-benzoin system as initiator (1989)
    Bognor Regis [u.a.] : Wiley-Blackwell
    Journal of Polymer Science Part A: Polymer Chemistry 27 (1989), S. 1687-1699 
    Details
    ISSN: 0887-624X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The polymerization of methyl methacrylate initiated by cupric laurate in combination with benzoin has been investigated in carbon tetrachloride medium at 60°C. The rate of polymerization was found to be proportional to the square root of both cupric ion and benzoin concentrations, and to the 1.5th power of the monomer concentration. Spectral studies indicated that there is a complex formation between cupric ion and the monomer methyl methacrylate. A reaction scheme, based on initial formation of the complex and its subsequent reaction with benzoin to produce the free radicals responsible for initiation has been postulated to explain the observed results.
    Additional Material: 12 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pola.1989.080270520
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  • 8
    Electronic Resource
    Electronic Resource
    Polymerization of methyl methacrylate with manganic laurate in combination with different substituted thiols as initiators (1992)
    Bognor Regis [u.a.] : Wiley-Blackwell
    Journal of Polymer Science Part A: Polymer Chemistry 30 (1992), S. 941-944 
    Details
    ISSN: 0887-624X
    Keywords: polymerization ; methyl methacrylate ; manganic laurate-substituted thiols ; 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/pola.1992.080300527
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  • 9
    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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  • 10
    Electronic Resource
    Electronic Resource
    Studies in addition polymerization in mixed solvent system part V. Chain transfer of short chain aliphatic alcohols in the polymerization of methyl methacrylate and styrene (1971)
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 149 (1971), S. 231-241 
    Details
    ISSN: 0025-116X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: Es wurden Polymerisation in Gegenwart von Alkoholen und Benzol als Polymerlösungsmittel (mixed-solvent system) untersucht. Die Kettenübertragungsfähigkeit aliphatischer Alkohole nimmt mit der Größe der Alkylkette in folgender Ordnung zu: Methylalkohol 〈 Äthylalkohol 〈 n-Propylalkohol 〈 Isopropanol. Nach den Ergebnissen ist eine Ablösung von α-Wasserstoff aus dem Substrat übertragend wirksam. Die durch die übliche Auftragung von 1/P̄ gegen [S]/[M] erhaltenen Kettenübertragungskonstanten stimmen gut mit Werten überein, die aus den mittels der Farbverteilungstechnik gemesse nen Hydroxylendgruppengehalten berechnet wurden. Die steigenden Werte der übertragungskonstante mit wachsender Zahl der Kohlenstoffatome im Alkohol wird durch die Wahrscheinlichkeit zugänglicher Wasserstoffatome in der Alkylgruppe erklärt. Die Kettenübertragungswerte werden durch die Fällung der Polymeren beeinflußt. Es wurden aus den Kettenübertragungswerten der Alkohole für verschiedene Temperaturen thermodynamische Parameter berechnet.
    Notes: Studies on Polymerization in the presence of alcohols has been carried out using mixed solvent system. It is observed that chain transferring capacity of the aliphatic alcohols do increase with the size of the alkyl group, the order being methyl alcohol 〈 ethyl alcohol 〈 n-propyl alcohol 〈 iso-propyl alcohol. The results indicate that α-hydrogen abstraction from the substrate is effective. The chain transfer constants obtained from the conventional plot of 1/P̄ against S/M is in fair agreement with the values computed from the estimation of hydroxyl end group in the polymer by dye-partition technique. The increasing transfer constant values in the alochol series with increase in the number of carbon atoms is explained on the basis of probability of available hydrogen atom in the alkyl group. It is also observed that the chain transfer values are affected due to precipitation of polymer. Thermodynamic parameters have been computed from the chain transfer values of alcohols at different temperatures.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/macp.1971.021490118
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