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  • 1
    Electronic Resource
    Electronic Resource
    Urease-collagen-ion exchange membrane (1975)
    New York, NY [u.a.] : Wiley-Blackwell
    Biotechnology and Bioengineering 17 (1975), S. 1387-1389 
    Details
    ISSN: 0006-3592
    Keywords: Chemistry ; Biochemistry and Biotechnology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: No Abstrast.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bit.260170917
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  • 2
    Electronic Resource
    Electronic Resource
    Photocontrol of trypsin inhibition with immobilized inhibitor (1977)
    New York, NY [u.a.] : Wiley-Blackwell
    Biotechnology and Bioengineering 19 (1977), S. 1549-1552 
    Details
    ISSN: 0006-3592
    Keywords: Chemistry ; Biochemistry and Biotechnology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bit.260191011
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  • 3
    Electronic Resource
    Electronic Resource
    Fed-batch hydrocarbon fermentation with colloidal emulsion feed (1973)
    New York, NY [u.a.] : Wiley-Blackwell
    Biotechnology and Bioengineering 15 (1973), S. 257-270 
    Details
    ISSN: 0006-3592
    Keywords: Chemistry ; Biochemistry and Biotechnology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Candida tropicalis was cultured with n-hexadecane, dispersed in water as submicron droplets, as the only carbon substrate; the emulsion being fed continuously into a fermentor containing only an aqueous medium (fed-batch culture). The results have demonstrated that the organism takes up hydrocarbon accommodated in the aqueous phase as submicron droplets. The cell/substrate yield for the linear growth phase, where growth was limited by the supply of the substrate, was much higher than the yield for the exponential growth phase.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bit.260150204
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  • 4
    Electronic Resource
    Electronic Resource
    Computational study of network formation of phenolic resinsPoster presented at the “International Symposium on Advanced Network-Polymers, Kansai University” (ISANKU), at Kansai University, Suita, Osaka, Japan, on December 5-6, 1995. (1996)
    Weinheim : Wiley-Blackwell
    Angewandte Makromolekulare Chemie 240 (1996), S. 181-186 
    Details
    ISSN: 0003-3146
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: The network formation of phenol-formaldehyde resin was investigated by the Monte Carlo (MC) simulation technique. The observed value of the gel point, pc, was exactly determined as a critical extent of reaction, where the Mw/Mn in soluble parts is maximum. The MC simulation with the cubic percolation theory was applied to the gelation of phenolic resins and gave an exact gel point, which was in excellent agreement with the observed value of pc. The simulation showed that the intramolecular reaction occurred frequently with increasing the gel fraction beyond the gel point. The structural analysis of the maximum cluster with the computer strongly supported the contribution of the intramolecular reaction to the network formation of the gel.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/apmc.1996.052400116
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  • 5
    Electronic Resource
    Electronic Resource
    Influence of the degree of acetylation of o-cresol resin on its molecular conformation in solution (1995)
    New York, NY [u.a.] : Wiley-Blackwell
    Polymer International 36 (1995), S. 333-338 
    Details
    ISSN: 0959-8103
    Keywords: solution viscosity ; Mark-Houwink-Sakurada equation parameter ; acetylated o-cresol-formaldehyde resin ; unperturbed dimension ; 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: o-Cresol-formaldehyde resin (OC) and five kinds of acetylated OC (AC-X-OC; X is the degree of acetylation) were prepared. The Θ-temperature for each resin was determined by means of the Shultz-Flory method, and their molecular conformations in both tetrahydrofuran (THF) and Θ-solvent were estimated from the values of the exponents in the Mark-Houwink-Sakurada equations. The effect of the degree of acetylation on the exponent was negligible in THF, but was remarkable in Θ-solvent. In THF, the molecular chains of these resins are relatively extended, because the hydrogen bond between phenolic hydroxyl groups is loosely formed. In Θ-solvent, however, the molecular conformation is compact and the resins are considered to form a pseudo cross-linked network structure through inter- and/or intra-molecular hydrogen bonds. The Mark-Houwink-Sakurada equation for AC-100-OC in 2-ethoxyethanol at 92.0°C was found to be [η]θ = 0.0773 M̄0.50n, where [η]0 is the limiting viscosity number under the Θ-condition, and M̄n is the number-average molecular weight. The unperturbed dimension, (〈r20〉/M̄n)1/2, 〈r20〉 being the unperturbed mean square end-to-end distance, for AC-100-OC was found to be 0.659×10-8 cm g-1/2 mol1/2.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pi.1995.210360405
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  • 6
    Electronic Resource
    Electronic Resource
    Determination of Mark-Houwink-Sakurada equation for phenolic resins and estimation of their molecular conformation in acetone solution (1989)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 38 (1989), S. 1305-1312 
    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: The effects of the molecular structure of phenolic resins on the Mark-Houwink-Sakurada (MHS) equation and the conformation in acetone solution were studied. The exponent in the MHS equation was remarkably less than that for linear polymers such as vinyl polymers, cellulose derivatives, and so on. As the cause, the branching and the hydrogen bonding between hydroxyl groups of the neighboring phenolic nuclei were considered. Several kinds of phenol-p-cresol and phenol-p-tert-butylphenol cocondensation resins whose composition differs from one another were synthesized. Despite the difference in the degree of branching, the exponent in the MHS equation for each was approximately equal. On the other hand, the exponent for o-cresol novolak, which was rich in ortho-para methylene linkages was larger than the all-ortho novolak and p-cresol novolak, which were rich in ortho-ortho methylene linkages. Methylation of the phenolic hydroxyl group increased the value of the exponent. From these results, it became obvious that while the hydrogen bonding lowered the exponent in the MHS equation due to molecular conformation compaction in acetone solution, the molecular branching had little effect on the exponent α.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1989.070380710
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  • 7
    Electronic Resource
    Electronic Resource
    Metall-Isotopie-Effekt bei Metall-Ligand-Schwingungen (1972)
    Weinheim : Wiley-Blackwell
    Zeitschrift für die chemische Industrie 84 (1972), S. 755-764 
    Details
    ISSN: 0044-8249
    Keywords: Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Die Nutzung des Isotopie-Effekts unter Verwendung von Schwermetallisotopen ermöglicht nunmehr eine eindeutige Zuordnung der Metall-Ligand-Schwingungen in den IR- und Raman-Spektren von Komplexverbindungen. Die bisher mit dieser neuen Methode erhaltenen Ergebnisse sowie ihre derzeitigen Limitationen werden im vorliegenden Fortschrittsbericht beschrieben.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/ange.19720841604
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  • 8
    Electronic Resource
    Electronic Resource
    Polymerization of vinyl acetate under high pressure (1968)
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 111 (1968), S. 93-103 
    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: Die radikalische Polymerisation von Vinylacetat unter hohem Druck wurde im Bereich von 1-2000 kg/cm2 in Gegaenwart und Abwesenheit von Lösungsmitteln untersucht.Durch den Druck wird das Auftreten von Verzweigunogen bei der Polymerisation in Substanz vermindert; gleicbzeiti nimmt die Kettenlänge des Polyvinylacetates mit steigendem Druck zu.Bei der Polymerisation in Lösung ändert sich die Größe des Aktivierungsvolumens der Kettenübertragung zum Lösungsmittel in der Reihenfolge: Toluol 〉 Chlorbenzol 〉 Brombenzol. In beiden Fällen nehmen die Bruttopolymerisationsgeschwindigkeit und das Molekulargewicht der Polymeren mit wachsendem Druck zu.Das Brattoaktivierungsvolumen der Vinylacetatpolymerisation beträgt -17,4 ml/Mol in Abwesenheit von Lösungsmittel und -12,0 ml/Mol in Benzol.
    Notes: High pressure radical polymerization of vinylacetate with and without solvents has been investigated in the range of 1-2000 kg/cm2.The pressure has the ability to interrupt an occurrence of branching in bulk polymerization and the overall chain length of polyvinylacetate increases with pressure.In solution polymerization, the magnitude of the activation volume of chain transfer to solvent is in following order: toluene 〉 chlorobenzene 〉 bromobenzene. In both cases, the overall rates of polymerizations and the molecular weights of polymers obtained increased with increasing pressure.The overall activation volumes of vinylacetate polymerization are -17.4 ml/mole without solvent and -12.0 ml/mole in benzene.
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/macp.1968.021110108
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  • 9
    Electronic Resource
    Electronic Resource
    Polymerization of itaconic acid under high pressure (1968)
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 111 (1968), S. 104-114 
    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: Radikalpolymerisationen von Itakonsäure wurden unter hohem Druck bis zu 5000 kg/CM2 in verschiedenen Lösungsmitteln untersucht.Injedem der Lösungsmittel wurde der kritische Druck, unter dem die Polymerisation nicht mehr eintritt, bestimint. Es wurde gefunden, daß eine lineare Abhängigkeit zwischen der Dielektrizitätskonstante des Lösungsmittels und dem kritischen Druck besteht. Die Bruttopolymerisationskonstante steigt deutlich mit dem Druck an, und das Aktivierungsvolmen besitzt im Vergleich zu anderen Vinylverbindungen ziemlich große absolute Werte.Die unter hohem Druck erhaltenen Polymeren sind weiß, spröde und schwach hygroskopisch. Sic sind besonders leicht löslich in Wasser, löslich in Methanol und Dimethylformamid; in andern organischen Lösungsmitteln sind sie unlöslich.
    Notes: Radical polymerizations of itaconic acid were investigated under high pressure up to 5000 kg/cm2 in several different solvents.The critical pressures under which polymerization does not take place were determined in each solvent and the relation between the dielectric constant of the solvent and the critical pressure was found to be linear. The overall rate of polymerization increases markedly with pressure and the activation volume indicates fairly large absolute values compared with those of other vinyl compounds.The polymers obtained under high pressure are white and brittle having a somewhat hygroscopic property, are soluble in methanol, dimethylformamide and especially in water, and are insoluble in other organic solvents.
    Additional Material: 9 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/macp.1968.021110109
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  • 10
    Electronic Resource
    Electronic Resource
    Linear all-ortho oligomers of phenol-formaldehyde resins. I. Preparations, characterizations, and solution properties (1993)
    Bognor Regis [u.a.] : Wiley-Blackwell
    Journal of Polymer Science Part A: Polymer Chemistry 31 (1993), S. 675-682 
    Details
    ISSN: 0887-624X
    Keywords: phenol-formaldehyde resin ; all-ortho oligomer ; intrinsic viscosity ; hydrogen bonds ; pseudo-cyclic conformation ; Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Three kinds of all-ortho methylene-linked phenolic oligomers, i.e., 4-tert-butylphenol (BP), phenol (AO), and O-methylated BP (BPM), were prepared with good yields and their dilute solution properties were studied. In acetone, all of these oligomers are highly solvated and molecularly dispersed. In chloroform, however, AO and BP molecules strongly form hydrogen bonds among themselves. By intramolecular and intermolecular hydrogen-bondings, a large portion of the dimers and the trimers of AO and BP associate to form bimolecular aggregates in chloroform, assuming pseudo-cyclic conformations analogous to calix [4] arene and calix [6] arene, respectively. By intramolecular hydrogen-bonding, the tetramers and the hexamers also form pseudo-cyclic conformations by themselves in chloroform. © 1993 John Wiley & Sons, Inc.
    Additional Material: 10 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pola.1993.080310311
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