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  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Chemie Ingenieur Technik - CIT 64 (1992), S. 769-770 
    ISSN: 0009-286X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 0009-286X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Structural Change of Engineering Units in the Chemical Industry - Ways of Becoming a Partner and Entrepreneur. Structural change must not be misunderstood as only observing staffing levels or methods of organisation. On the contrary, the cost/benefit-relation is much more important. A balanced relation of a company's own personnel and the contractor's has to be considered. Structural change means also change of mind set: The task of management is nowadays to implement a culture of operational profit instead of a culture of demands. It is becoming more and more important to cooperate in a team. This cooperation starts early in defining the project aims, includes analysing all functions, looking for alternatives regarding cost/benefit-aspects and is based on a clear, structured analysis of the problem instead of quick solutions.
    Additional Material: 8 Ill.
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  • 3
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Chemie Ingenieur Technik - CIT 66 (1994), S. 220-223 
    ISSN: 0009-286X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Additional Material: 5 Ill.
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  • 4
    ISSN: 0009-286X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Additional Material: 3 Ill.
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  • 5
    Electronic Resource
    Electronic Resource
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 15 (1964), S. 150-154 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Investigation on the influence of household detergents on metals, and of metals on household detergents. Second Communication Behaviour of copper alloysWith the aid of the testing method described in the first communication, the behaviour of different copper alloys or alloys containing copper has been investigated in four different commercial household detergents. The investigations included:Brasses: Cu, Ms 90, Ms 80, Ms 72, Ms 63, Ms 63 Pb, Ms 58, Zn.Special brasses: SoMs 68, SoMs 59, SoMs 58, SoMs 58 Pb, SoMs 58 Al 2.Tin bronzes: SnBz 4, SnBz 6, SnBz 8, Tego—bronzes, Sn.Aluminium bronzes: AlBz 4, AlBz 9, Al Cu multi-metal bronzes, AlMBz 10, Aeterna AF 50, Aeterna W II A, Admos.German silver: Ns 5712 Pb, Ns 6512, Ns 6218, Ns 6218 Pb, Ns 6025.The weight loss in grams per square metre was determined for each alloy in each of the four detergents, and the peroxide reduction in the detergents was ascertained. It was found that, depending on the type of detergent, different alloy components are apt to either increase or reduce the dissolution rate in the detergent solutions. For instance, the weight loss of Cu Zn alloys decreases with increasing Cu content; Al affects the stabilisation of one detergent whilst the stabilisation of other detergents is enhanced by an aluminium admixture.Apart from a few exceptions, the peroxide reduction is not greatly influenced by the alloy constituents (exceptions: Al and Si). Among the alloys investigated, the best resistance in detergent solutions was shown by the higher alloy German silver alloys.
    Notes: Mit Hilfe der in der 1. Mitteilung beschriebenen Prüfmethode wird das Verhalten von verschiedenen Cu-Legierungen bzw. Cu-haltigen Legierungen in 4 verschiedenen handelsüblichen Haushaltswaschmitteln untersucht. In diese Untersuchungen wurden einbezogen:Messinge: Cu, Ms 90, Ms 80, Ms 72, Ms 63, Ms 63 Pb, Ms 58, Zn.Sondermessinge: SoMs 68, SoMs 59, SoMs 58, SoMs 58 Pb, SoMs 58 Al 2.Zinnbronzen: SnBz 4, SnBz 6, SnBz 8, Tego—Bronzen, Sn.Al—Bronzen: AlBz 4, AlBz 9, Al—Cu-Mehrstoffbronzen, AlMBz 10, Aeterna AF 50, Aeterna W H A, Admos.Neusilber: Ns 5712 Pb, Ns 6512, Ns 6218, Ns 6218 Pb, Ns 6025.Von jeder Legierung wurde in jedem der 4 Waschmittel der Gewichtsverlust in g/m2 bestimmt und in den Waschmitteln der Peroxidabbau. Es zeigte sich, daß je nach Waschmitteltype verschiedene Legierungsbestandteile die Auflösungsgeschwindigkeit in Waschmittel-Lösungen erhöhen bzw. erniedrigen, z. B. sinkt die Gewichtsabnahme von Cu—Zn-Legierungen mit steigendem Cu-Gehalt, Al hebt die Stabilisierung in einem Waschmittel auf, während sie in anderen Waschmitteln durch Al-Zulegierung erhöht wird.Der Peroxidabbau wird bis auf einige Ausnahmen durch die Legierungsbestandteile nicht wesentlich beeinflußt (Ausnahme Al und Si).Beständig in den Waschlaugen sind von den untersuchten Legierungen die höher legierten Neusilber-Legierungen.
    Additional Material: 4 Ill.
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  • 6
    Electronic Resource
    Electronic Resource
    New York : Wiley-Blackwell
    Biopolymers 42 (1997), S. 855-860 
    ISSN: 0006-3525
    Keywords: helix bundles ; coiled coils ; α-spectrin ; tropomyosin ; Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The dipole interaction model is used to investigate the effects of interactions between helices and supertwisting of helices by determining whether the predicted UV absorption and CD spectra for the three-helix bundle and coiled coil are significantly different from spectra for the single straight α-helix. Crystallographic data by Yan et al. for α-spectrin are used to construct a three-helix bundle of poly(L-alanine) modeling the protein. Backbone torsion angles represented by Fourier series are used to generate supertwisted helices and coiled coil models of poly(L-alanine) that have pitch, radius, and residue repeat similar to experimental crystallographic data on tropomyosin. Calculated CD spectra are compared with available experimental data. Theoretical spectra for the three-helix bundle and the supertwisted structures are quite similar to predictions for the straight α-helix of the same length with similar torsion angles, suggesting that CD is primarily dependent on the average backbone conformation and would not be a sensitive tool for distinguishing between single straight helices and closely packed or twisted α-helices. © 1997 John Wiley & Sons, Inc. Biopoly 42: 855-860, 1997
    Additional Material: 2 Ill.
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  • 7
    Electronic Resource
    Electronic Resource
    New York : Wiley-Blackwell
    Biopolymers 22 (1983), S. 163-169 
    ISSN: 0006-3525
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Conformational studies on poly(oxyethylene)-bound homo-, oligo-, guest-host, and sequential peptides synthesized according to the liquid-phase method were carried out by means of 1H-nmr spectroscopy. The solubilizing effect of the C-terminal polymeric support allowed a thorough investigation of the secondary structure in solution.
    Additional Material: 3 Ill.
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  • 8
    Electronic Resource
    Electronic Resource
    New York : Wiley-Blackwell
    Biopolymers 13 (1974), S. 227-235 
    ISSN: 0006-3525
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The heats of the conformational conversion ΔHc of polyuridylic acid (polyU) in the presence of various cations were determined using a differential scanning microcalorimeter and an isothermal mixing calorimeter. The first method yields a value of ΔHc = 5.2 kcal/mol of base pairs, the second one a value of ΔHc = 6.4 kcal/mol of base pairs. Knowing ΔHc and the maximal slope of the degree of conversion, which was determined from the temperature dependence of the absorbance of polyU solutions at 260 nm, we were able to evaluate the parameter of cooperativity σ. From the relation σ = eΔFstack/RT the stacking free energy ΔFstack could be calculated. Dividing the apparent enthalpy of conversion by the calorimetrically measured enthalpy yields the cooperative length N0 of one helical segment at the midpoint of conversion. The results show that the type of the cation has no influence on the magnitude of ΔHc, whereas the cooperativity of polyU is influenced by the various cations.
    Additional Material: 3 Ill.
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  • 9
    Electronic Resource
    Electronic Resource
    Hoboken, NJ : Wiley-Blackwell
    Journal of Polymer Science 41 (1959), S. 543-544 
    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.
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