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  • 1
    Electronic Resource
    Electronic Resource
    m-Bromophenolic epoxy resins for electronic packaging (1992)
    Weinheim : Wiley-Blackwell
    Angewandte Makromolekulare Chemie 198 (1992), S. 51-60 
    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: Meta-halogenierte Phenole sind bekanntermaßen chemisch und thermisch stabiler als ihre ortho- oder para-halogenierten Analoga. Die Verwendung eines reaktiven Zwischenproduktes, hergestellt durch Bromierung von 2,4,6-Trimethylphenol, als Alkylierungsmittel für den Einbau der stabilen m-Bromphenol-Einheit in verschiedene organische Substanzen und Polymere wird beschrieben. Bei der Anwendung als Verkapselungsmaterialien für elektronische Bauteile zeigten sich Epoxid-Derivate von Novolaken mit m-Bromphenol-Einheiten bezüglich hydrolytischer und thermischer Stabilität den konventionellen Tetrabrombisphenol-A-Epoxidharzen, die ortho- und para-bromiert sind, überlegen. Die m-Bromphenolgruppe verbessert die Bauteilzuverlässigkeit bei gleichzeitiger Erfüllung der Anforderungen an das Brandverhalten.
    Notes: Meta-halogenated phenols are generally known to be more chemically and thermally stable than their ortho- or para-halogenated counterparts. A reactive intermediate, produced by the bromination of 2,4,6-trimethylphenol is being used as an alkylating agent to incorporate this stable m-bromophenol moiety into varieties of organic compounds and polymers. In electronic encapsulation applications, epoxy derivatives of novolacs containing m-bromophenol have exhibited superior hydrolytic and thermal stability as compared with the conventional tetrabromo bisphenol-A epoxies which are ortho-brominated phenolics. The m-bromophenol moiety contributes to the extended device reliability while meeting flame retardency requirements as well.
    Additional Material: 5 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/apmc.1992.051980105
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  • 2
    Electronic Resource
    Electronic Resource
    Isolation and Structure of a New Antibiotic Related to Rubiflavin AAt Warner-Lambert/Parke-Davis, this new antibiotic is known as PD 121,222. Therefore, this latter designation is used throughout this paper. (1985)
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 68 (1985), S. 953-957 
    Details
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: A novel antibiotic, PD 121,222, was isolated from a complex of pluramycin-like compounds containing mostly kidamycin and neopluramycin. Spectral analyses showed that this compound is the 14,16-dihydroxy analog of rubiflavin A.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/hlca.19850680419
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  • 3
    Electronic Resource
    Electronic Resource
    Neuere Erkenntnisse zur Polymerisation von BlausäureVorgetragen beim XXIV. IUPAC-Kongreß, Hamburg, September 1973. (1974)
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 175 (1974), S. 403-412 
    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: Two principally different mechanisms are discussed for the polymerisation of hydrogen cyanide. The one considers the building up of the polymer as being stepwise and based on hydrogen cyanide as the monomer, whereas the other one assigns the hydrogen cyanide dimer for being the actually polymerizing “monomer”. In the case of the “dimer polymerisation” a carbene mechanism is taken into consideration besides an anionic one.Different N-alkyl substituted hydrogen cyanide dimers were synthesized. They did not exhibit any properties of a carbene and were relatively stable. Their reactions with hydrogen cyanide were studied. A series of addition products were obtained which extensively favor the mechanism of the stepwise polymerisation.
    Notes: Für die Polymerisation der Blausäure werden zwei grundsätzlich verschiedene Mechanismen diskutiert, von denen einer den schrittweisen Aufbau des Polymeren, ausgehend von Blausäure als Monomerem, vorsieht, während der andere auf dem Dimeren der Blausäure als dem eigentlichen polymerisierenden „Monomeren“ beruht. Für die „Dimerpolymerisation“ wird neben dem anionischen noch ein carbenoider Mechanismus in Betracht gezogen.Es wurden verschiedene N-Alkyl-substituierte Blausäuredimere hergestellt. Sie zeigten keinen Carbencharakter und waren relativ stabil. Ihre Umsetzungen mit Blausäure wurden studiert. Dabei wurde eine Reihe von Additionsprodukten erhalten, die weitgehend den schrittweisen Polymerisationsmechanismus favorisieren.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/macp.1974.021750205
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  • 4
    Electronic Resource
    Electronic Resource
    Mixing in polymer processing, by Chris Rauwendaal ed., Marcel Dekker, Inc., New York, 1991, 496 pp. price: $160.00 (1993)
    Bognor Regis [u.a.] : Wiley-Blackwell
    Journal of Polymer Science Part A: Polymer Chemistry 31 (1993), S. 1343-1344 
    Details
    ISSN: 0887-624X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pola.1993.080310534
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  • 5
    Electronic Resource
    Electronic Resource
    Mapping the enzymatic active site of Pseudomonas aeruginosa exotoxin A (1988)
    New York, NY : Wiley-Blackwell
    Proteins: Structure, Function, and Genetics 3 (1988), S. 146-154 
    Details
    ISSN: 0887-3585
    Keywords: Pseudomonas toxin ; x-ray crystallography ; ADP-ribosyl transferase ; sequence homology ; Chemistry ; Biochemistry and Biotechnology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Medicine
    Notes: Pseudomonas aeruginosa exotoxin A is representative of a class of enzymes, the monoADP-ribosyl, which catalyze the covalent transfer of an ADP-ribose moiety of NAD+ to a target substrate. Availability of the three-dimensional structure of exotoxin A provides the opportunity for mapping substrate binding sites and suggesting which amino acid residues may be involved in catalysis. Data from several sources have been combined to develop a proposal for the NAD+ binding site of exotoxin A: the binding of NAD+ fragments adenosine, AMP, and ADP have been delineated crystallographically to 6.0, 6.0, and 2.7 Å, respectively; significant sequence homology spanning 60 residues has been found between exotoxin A and diphtheria toxin, which has the identical enzymatic activity; iodination of exotoxin A, under conditions in which only tyrosine 481 is iodinated in the enzymatic domain, abolishes ADP-ribosyl transferase activity.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prot.340030303
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  • 6
    Electronic Resource
    Electronic Resource
    Mixing in polymer processing edited by Chris Rauwendaal, Marcel Dekker, new york, 1991, 496pp., $160.00 (1994)
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 40 (1994), S. 383-383 
    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.690400224
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  • 7
    Electronic Resource
    Electronic Resource
    Continuous culture of Pseudomonas fluorescens with sodium maleate as a carbon sourcePresented in part before the Annual Meeting of the Division of Microbial Chemistry and Technology, American Chemical Society, Chicago, Illinois, September, 1970. (1972)
    New York, NY [u.a.] : Wiley-Blackwell
    Biotechnology and Bioengineering 14 (1972), S. 123-147 
    Details
    ISSN: 0006-3592
    Keywords: Chemistry ; Biochemistry and Biotechnology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Pseudomonas fluorescens (ATCC 11150) was grown in batch and continuous culture in minimal media with sodium maleate as growth-limiting sole organic carbon source. Growth was followed by turbidity and dry weight measurements. Gross composition of washed cells (relative amounts of protein, lipid, RNA, and DNA) and the distribution of amino acids in protein hydrolyses of the cells were determined for cells grown in continuous culture at various dilution rates. Extracellular concentrations of the original carbon source and a number of metabolites were monitored by a total carbon analysis, ion exchange chromatography, and ultraviolet-visible scans of cell-free supernatants and chromatographic fractions, thereof.Substrate inhibition by maleate was a major factor in the growth kinetics of both batch and continuous cultures. Excessive maleate concentration caused instability in continuous cultures. By appropriate operation, much higher specific growth rates (0.305/hr) could ultimately be achieved in continuous culture compared to batch culture (0.174/hr). Adaptation was responsible for only part of the differences between batch and continuous cultures; the differing distribution of metabolites were also major factors.
    Additional Material: 11 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bit.260140111
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  • 8
    Electronic Resource
    Electronic Resource
    Efficient biokinetic experimental designs (1975)
    New York, NY [u.a.] : Wiley-Blackwell
    Biotechnology and Bioengineering 17 (1975), S. 557-570 
    Details
    ISSN: 0006-3592
    Keywords: Chemistry ; Biochemistry and Biotechnology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Of the experimental methods available for obtaining data to estimate the biological kinetic parameters μm, Ks, and Yeach requires considerable experimental effort, yet often yields somewhat imprecise estimates of the parameters, particularly Ks. Therefore it would be worthwhile to seek ways to get parameter estimates of greater precision using less experimental effort. The precision of parameter estimates is strongly dependent, upon the settings of the independent, variables used in the experiments. This dependence is explained and an attempt made to show how experimental settings can be determined that lead efficiently to precise parameter estimates with minimal effort.
    Additional Material: 9 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bit.260170408
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  • 9
    Electronic Resource
    Electronic Resource
    Hydrolysis of salicin by β-glucosidase in a hollow fiber reactor (1977)
    New York, NY [u.a.] : Wiley-Blackwell
    Biotechnology and Bioengineering 19 (1977), S. 1253-1258 
    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.260190817
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  • 10
    Electronic Resource
    Electronic Resource
    Continuous, high level production and excretion of a plasmid-encoded protein by Escherichia coli in a two-stage chemostat (1993)
    New York, NY [u.a.] : Wiley-Blackwell
    Biotechnology and Bioengineering 41 (1993), S. 937-946 
    Details
    ISSN: 0006-3592
    Keywords: protein excretion ; continuous culture ; Escherichia coli ; β-lactamase ; Chemistry ; Biochemistry and Biotechnology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: The stable continuous overproduction of a plasmidencoded protein, β-lactamase, for at least 50 days by Escherichia coli K-12, RB791(pKN), with release into the culture medium has been demonstrated in two-stage chemostats. The second-stage culture was continuously induced with 0.1 mM IPTG. Continuous expression of β-lactamase could not be sustained with this strain in a single-stage chemostat because of cell death and selection for lac-1 cells. β-Lactamase production in the second stage was sensitive to the second-stage dilution rate and the distribution of the limiting substrate (i.e., glucose) between the first and second stages. The fraction of viable, excreting cells and the average copy number in the induced culture was measurably higher under those conditions of dilution rate and substrate distribution which yielded high β-lactamase levels. The best operating conditions found at 20°C were a first-stage dilution rate of 0.12 h-1, a second-stage dilution rate of 0.03 h-1, and equal glucose feed supplied to each stage. Enzymatically active β-lactamase was produced at a level of 25% of total cellular protein with 90% excretion yielding 300 mg β-lactamase/L that was 50% pure at an OD600 〈 6. © 1993 Wiley & Sons, Inc.
    Additional Material: 12 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bit.260411004
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