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  • Wiley-Blackwell  (139)
  • 2015-2019
  • 1975-1979  (139)
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Keywords
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  • 1
    Electronic Resource
    Electronic Resource
    Continuous culture of Thiobacillus ferrooxidans on a zinc sulfide concentrate (1975)
    New York, NY [u.a.] : Wiley-Blackwell
    Biotechnology and Bioengineering 17 (1975), S. 939-939 
    Details
    ISSN: 0006-3592
    Keywords: Chemistry ; Biochemistry and Biotechnology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bit.260170612
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  • 2
    Electronic Resource
    Electronic Resource
    Continuous culture of Thiobacillus ferrooxidans on a zinc sulfide concentrate (1975)
    New York, NY [u.a.] : Wiley-Blackwell
    Biotechnology and Bioengineering 17 (1975), S. 31-49 
    Details
    ISSN: 0006-3592
    Keywords: Chemistry ; Biochemistry and Biotechnology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: A zinc sulfide concentrate was leached microbiologically by Thiobacillus ferrooxidans in a continuous stirred tank reactor. A model was developed to predict, the leaching kinetics when the bacterial growth rate was not limited by any substrate other than the zinc concentrate, and it was modified to explain the observed results.Stable steady sates were obtained over a range of dilution rates from 0.0171 to 0.1038 hr-1. Because a solid substrate was used, the specific growth rate of the bacaeria was not a unique function of the subastrate concentration, and conventional contnuous culture theory based on the Monod equation did not apply to this system. The leaching rates and bacterial growth rates were first order in mineral surface area cocentration.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bit.260170104
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  • 3
    Electronic Resource
    Electronic Resource
    Residence time distributions of paper pulp slurries in vertical laminar flow (1979)
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 25 (1979), S. 131-143 
    Details
    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 hydrodynamic behavior of paper pulp slurries in vertical laminar flow has been observed and modeled. Radiotracers were used to tag both the liquid and solid phases of slurries flowing in 4 and 30 cm pipes. Residence time distributions were determined for each phase and were used to derive and compare several flow models. A model consisting of a central core in plug flow circumscribed by a clear Newtonian annulus provides a good representation of the observed slurry behavior. Correlations between the model parameters and the Reynolds number and slurry consistency are presented, and implications of the results on the design of slurry flow reactors are discussed.
    Additional Material: 15 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aic.690250115
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  • 4
    Electronic Resource
    Electronic Resource
    Letters to the editor (1976)
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 22 (1976), S. 622-623 
    Details
    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
    URL: http://dx.doi.org/10.1002/aic.690220343
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  • 5
    Electronic Resource
    Electronic Resource
    Solutions properties of cellulose triacetate II. Behaviour in binary solvents and temperature dependence of viscosity (1977)
    Weinheim : Wiley-Blackwell
    Angewandte Makromolekulare Chemie 65 (1977), S. 183-195 
    Details
    ISSN: 0003-3146
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: Die Viskositätszahl von Cellulosetriacetat (CTA) in Mischungen aus Chloroform-Methanol, Chloroform-Butanol, Chloroform-Propanol, Tetrachloräthan-Butanol, Dimethylformamid-Methanol und Nitromethan-Methanol nimmt anfänglich mit steigen-dem Alkoholgehalt zu, um nach Erreichen eines Maximums dann abzufallen, während in Mischungen aus Chloroform-Cyclohexan und Dioxan-Benzol die Werte mit abnehmen-der Lösungskraft steigen. die Polymerkonformation hängt von dem Gehalt an Essigsäure in Polymeren ab. Untersuchungen der Temperaturaturabhängigkeit der Viskosität in reinen und gemischten Löngsmitteln Zeigen, daß sich CTA wie ein steifes Kettenmolekül in der Lösung verhält.
    Notes: The intrinsic viscosity of cellulose triacetate (CTA) in chloroform-methanol, chloroform-butanol, chloroform-propanol, tetrachloroethane-butanol, dimethyl formamide-methanol, and nitromethane-methanol mixtures is found to increase initially with the amounts of alcohols in the mixture, then decreases in each studied system after attaining a maximum value, while in chloroform-cyclohexane and dioxane-benzene systems values are found to decrease with the decreasing solvent power. The type of the polymer conformation in the binary solvents is found to be dependent on the acetic acid content of the polymer. Studies on the temperature dependence of viscosity in pure and mixed solvent systems indicate that CTA behaves as a stiff chain molecule in the solution.
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/apmc.1977.050650113
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  • 6
    Electronic Resource
    Electronic Resource
    The spatial distribution of moving macromolecules undergoing isomerization (1976)
    New York : Wiley-Blackwell
    Biopolymers 15 (1976), S. 1717-1739 
    Details
    ISSN: 0006-3525
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: In this paper we use probabilistic arguments to derive and discuss the spatial distribution of molecules which are undergoing electrophoresis or centrifugation while at the same time they are switching back and forth between two configurational states. An exact solution is obtained for arbitrary values of the diffusion coefficients of the two isomerizing states. The traditional analytic method of solving this problem, namely, by use of “master equations,” is not completely satisfactory because one can find only the Fourier transform of the solution rather than the solution itself. Our treatment yields the answer one would get if it were feasible to perform the inversion of the Fourier transform.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bip.1976.360150909
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  • 7
    Electronic Resource
    Electronic Resource
    Poly(L-lysyl-L-alanyl-α-L-glutamic acid)All amino acid are L unless designated otherwise. Other abbreviations are: Dnp, 2,4-dinitrophenyl; Boc, t, butyloxycarbonyl; Cbz, carbobenzoxy; -ONSu, N-hydroxysucinimide ester; Mr, molecular weight; Mw, weight-average moleculer weight; Mn, number-average molecular weight; Mz, z-average molecular weight. (1977)
    New York : Wiley-Blackwell
    Biopolymers 16 (1977), S. 1513-1525 
    Details
    ISSN: 0006-3525
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Poly(Lys(Cbz)-Ala-Glu(OBzl)) was prepared by the self-condensation of Lys(Cbz)-Ala-Glu(OBzl)-ONSu in dimethylformamide. After deprotection of the side chains, the product was subjected to Sephadex G-50 chromatography. The molecular weight of unfractionated and fractionated poly(Lys-Ala-Glu) was calculated from a calibrated Sephadex G-50 column, spectrophotometrically from Dnp-(Lys-Ala-Glu), equilibrium centrifugation, and viscosity measurements. Approximately 21% of the unfractionated material was polymeric with the remaining 79% being cyclic and monomeric material. Treatment of polymer hydrolysate with L-amino acid and D-amino acid oxidase indicated poly(Lys-Ala-Glu) to be optically pure. The apparent pKa's of the two ionizable groups were 4.1 and 9.7.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bip.1977.360160711
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  • 8
    Electronic Resource
    Electronic Resource
    Representability (1978)
    New York, NY : Wiley-Blackwell
    International Journal of Quantum Chemistry 13 (1978), S. 697-718 
    Details
    ISSN: 0020-7608
    Keywords: Computational Chemistry and Molecular Modeling ; Atomic, Molecular and Optical Physics
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: We survey the present status of the representability problem. We introduce in the last section a new class of representability conditions.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/qua.560130603
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  • 9
    Electronic Resource
    Electronic Resource
    Identification de stérols à chaînes latérales courtes dans l′éponge Damiriana hawaiiana‘Minor and Trace sterols in Marine Invertebrates’, Partie 4, Partie 3: [1]. (1978)
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 61 (1978), S. 1470-1476 
    Details
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Identification of short side chain sterols in the sponge Damiriana hawaiianaThe steroidal composition of the sponge Damiriana hawaiiana is examined. Twenty-seven components are identified. In addition to the C26-C29, Δ5-mono and diunsaturated sterols, the sponge contains sterols without side-chain: androsta-5, 16-dien-3β-ol(1), androst-5-en-3β-ol(2); sterols with a non-functionalized side-chain consisting of two, three, four, five and six carbon atoms: pregna-5, 20-dien-3β-ol(5), pregn-5-en-3β-ol(6), 23, 24-bisnor-chola-5, 20-dien-3β-ol(7), 23, 24-bisnor-chol-5-en-3β-ol(8), 24-nor-chol-5-en-3β-ol(10), chol-5-en-3β-ol(11), 26, 27-bisnor-cholest-5-en-3β-ol(12), and sterols possessing a short oxygenated side-chain such as 3β-hydroxy-androst-5-en-17-one(3), androst-5-en-3β, 17β-diol(4) and 3β-hydroxy-26, 27-bisnor-22-trans-cholesta-5, 22-dien-24-one(14). The probable biological or dietary origin rather than artifact production of these hitherto undescribed components from marine sources is supported by their relatively high concentration and their relative proportions, both very different from those expected for autoxidation.
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/hlca.19780610431
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  • 10
    Electronic Resource
    Electronic Resource
    On the structure of the diagonal conditionsA preliminary version of this paper was published in RDO News 3, 46, (1977) - a news letter published at Queen's University. (1978)
    New York, NY : Wiley-Blackwell
    International Journal of Quantum Chemistry 13 (1978), S. 731-736 
    Details
    ISSN: 0020-7608
    Keywords: Computational Chemistry and Molecular Modeling ; Atomic, Molecular and Optical Physics
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Some structural features of the diagonal problem of reduced density matrix theory are investigated by considering the cone Br introduced elsewhere. In some special cases, we discover a very tight connection between the group structure of Gr, the invariance group of Br, and the convex structure of Br. We also state a general theorem that relates the convex structure of Br to the group structure of Gr.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/qua.560130605
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