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  • Wiley-Blackwell  (33)
  • 1990-1994  (14)
  • 1985-1989  (17)
  • 1960-1964  (2)
  • 1
    Electronic Resource
    Electronic Resource
    Topographical requirements for δ-selective opioid peptidesAbbreviations: All amino acids are of the L variety unless otherwise stated. Abbreviations for amino acid residues follow those recommended by the IUPAC. Other abbreviations include the following: DPDPE. enkephalin, H-Tyr-D- Pen, penicillamine or β,β-dimethylcysteine; DCFPE, DRE, dermen kephalin, H-Tyr-D-Met-Phe-His-Leu-Met-Asp-NHg; DPLPE, DSLET, H-Tyr-D-Ser-Gly-Phe-Leu-Thr-OH; DSTBULET, H-Tyr-D-Ser(OtBu)-Gly-Phe-Leu-Thr-OH; BUBU, H-Tyr-D-Ser(OtBu)-Gly-Phe-Leu-Thr(OtBu)-OH; DAGO, [D -ala2, N-MePhe4, Gly5]enkephalin-OL. (1991)
    New York : Wiley-Blackwell
    Biopolymers 31 (1991), S. 941-955 
    Details
    ISSN: 0006-3525
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The conformational possibilities of three different δ-selective opioid peptides, which are DPDPE , and DRE (Tyr-D-Met-Phe-His-Leu-Met-Asp-NH2, dermenkephalin), were explored using energy calculations. Sets of low-energy conformers were obtained for each of these peptides. The sets consisted of 61 structures for DPDPE, 32 for DCFPE, and 38 for DRE, including various types of rotamers of the Tyr and Phe side-chain groups. Comparison of the geometrical shapes of the conformers was performed for these sets using topographical considerations, i.e., examination of the mutual spatial arrangement of the N-terminal α-amino group, and of the Tyr and Phe side-chain groups. The results obtained suggest a model for the δ-receptor-bound conformer(s) for opioid peptides. The model suggests the placement of the Phe side chain in a definite position in space corresponding to the g- rotamer of Phe for peptides containing Phe4 and to the t rotamer for peptides containing Phe.3 The position of the Tyr1 side chain cannot be specified so precisely. The proposed model is in a good agreement with the results of biological testing of β-Me-Phe4-substituted DPDPE analogues that were not considered in the process of model construction.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bip.360310804
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  • 2
    Electronic Resource
    Electronic Resource
    Synthese verschiedener Oxincellulosen für spurenanalytische Anreicherungsverfahren (1989)
    Weinheim : Wiley-Blackwell
    Angewandte Makromolekulare Chemie 170 (1989), S. 159-172 
    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: Some routes to synthetize covalently bound chelating groups as 8-hydroxyquinoline or 8-hydroxyquinoline-5-sulfonic acid to cellulose are given. The products show a capacity of 500-800 μmol/g, fast kinetics of exchange and good stability against the eluent. The apparent stability constant of the complexes with Zn2+ are around 2 · 105 mol-1 dm3.
    Notes: Es werden mehrere Synthesemöglichkeiten für die Herstellung von an Cellulose immobilisierten 8-Hydroxychinolin- und 8-Hydroxychinolin-5-sulfonsäure-Derivaten beschrieben, die zu einem Produkt mit einer Kapazität von 500-800 μmol/g, hoher Austauschgeschwindigkeit und guter Stabilität gegenüber dem Eluenten führen. Die scheinbare Komplexbildungskonstante der Oxincellulosen mit Zn2+ ist etwa 2 · 105 mol-1 dm3.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/apmc.1989.051700112
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  • 3
    Electronic Resource
    Electronic Resource
    Darstellung einiger B-Norcholestan-Derivate (1963)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 96 (1963), S. 152-156 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Die Methanolyse des 5-Hydroxy-3-acetoxy-B-norcholestan-säure-(6)-lactons (VII) führt in normaler Reaktion zu X und nicht zu einem Umlagerungsprodukt, entsprechend III (OH statt OAc), wie von DAUBEN und Mitarbb.1,2) angegeben. Ähnlich liefert Hydrolyse bzw. Äthanolyse die entsprechenden B-Norcholestan- Derivate VIII bzw. VI.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19630960115
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  • 4
    Electronic Resource
    Electronic Resource
    Hydrodynamic behaviour of 1,4-trans-polyisoprene (1985)
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 186 (1985), S. 2341-2353 
    Details
    ISSN: 0025-116X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: The unperturbed dimensions of 1,4-trans-polyisoprene (TPIP) were estimated using various [η] - Mw extrapolation methods. The results of various methods agree very closely, however, the solvent-polymer interaction parameter, B, assumes different values from method to method. The polymer chains are found to assume random coil structure in solvents like benzene, toluene and cyclohexane. A more compact coiled structure is found in hexane. This was further substantiated by estimation of the excluded volume per segment: 7,3 Å3 in good solvents and 4,0 Å3 in hexane. On a relative scale, the stiffness parameters for TPIP chains were found to be: σ = 1,26 and C∞ = 5,99 for the expanded coil configuration, and σ = 1,11 and C∞ = 4,46 for the compact coil configuration, which is smaller than the literature data. If the latter are corrected for molecular heterogeneity, the agreement with the present data is excellent. The temperature coefficient of the unperturbed dimensions also supports this results.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/macp.1985.021861115
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  • 5
    Electronic Resource
    Electronic Resource
    Crystallization kinetics of 1,4-trans-polyisoprene, 1. Pure polymer (1987)
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 188 (1987), S. 421-431 
    Details
    ISSN: 0025-116X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: The Crystallization kinetics of an unfractionated sample of 1,4-trans-polyisoprene was studied from its melt by means of the dilatometric method. The data are analysed according to the secondary nucleation theory. A critical discussion and comparison of previously published kinetic parameters with those derived in the present study is made. The values of the product of interfacial free energies, σσe, were found to be 590,5 and 915 erg2/cm4 for the low melting and high melting polymorphs, respectively. The observed deviation from the Avrami theory towards completion of the process is interpreted to be due to the low molecular weight species of the low melting polymorph.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/macp.1987.021880218
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  • 6
    Electronic Resource
    Electronic Resource
    Crystallization kinetics of 1,4-trans-polyisoprene, 2Part 1: cf.8.. Polymer-diluent mixtures (1987)
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 188 (1987), S. 433-444 
    Details
    ISSN: 0025-116X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Four mixtures of 1,4-trans-polyisoprene with methyl oleate (vol. fraction of polymer: 0,696 to 0,092) were prepared, and a dilatometric study of the crystallization kinetics was carried out in a convenient temperature range. The polymer was found to crystallize in the form of its high melting polymorph. The amount of secondary crystallization was less compared to that observed earlier for undiluted polymer. Formation of crystalline phase was found to be more difficult. In the absence of nucleation and growth data, the actual differences in interfacial energies required for nucleation and growth could not be estimated quantitatively, however, the experimental results indicate that compared to the bulk system, the energy requirements for the primary nucleation act in case of mixtures are higher. The interfacial energy σ′e (calculated after neglecting the transport term) was in the range 2309-2356 cal/mol for all the mixtures and showed appreciable variation with change in polymer concentration. A molecular interpretation of the possible mechanism operating in the crystallization of mixtures is given.
    Additional Material: 9 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/macp.1987.021880219
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  • 7
    Electronic Resource
    Electronic Resource
    Arbeitsvorschriften und Meßergebnisse Nickel(II) Complexes of Unsymmetrical Tetradentate Azomethines Derived from Pentane-2,4-dione and 2-Hydroxy-1-naphthaldehyde, Salicylaldehyde or o-HydroxyacetophenoneStudies on Novel Unsymmetrical Azomethines. Part V. Part IV. Nickel(II) and Copper(II) Complexes of Unsymmetrical Penta-and Hexadentate Azomethines. Synth. React. Inorg. Met.-Org. Chem., No.5 (1985) (1985)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 327 (1985), S. 852-856 
    Details
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19853270518
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  • 8
    Electronic Resource
    Electronic Resource
    Synthesis and properties of polyurethanes containing s-triazine rings in the main chainNCL Communication No. 4557. (1989)
    Bognor Regis [u.a.] : Wiley-Blackwell
    Journal of Polymer Science Part A: Polymer Chemistry 27 (1989), S. 3263-3269 
    Details
    ISSN: 0887-624X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Eight new diisocyanate monomers containing s-triazine ring have been prepared from the parent diacids via the Curtius rearrangement of the corresponding diacyl azides. The parent diacids were synthesised by the reaction of p- and m-hydroxybenzoic acid with 6-methoxy-2,4-dichloro-s-triazine, 6-phenoxy-2,4-dichloro-s-triazine, 6-phenyl-2,4-dichloro-s-triazine, and 2-diphenylamino-4,6-dichloro-s-triazine respectively. Polyurethanes have been synthesised by solution polymerization of these diisocyanates with ethylene glycol in N,N-dimethylacetamide (DMAC). The resulting polymers were characterized by IR spectroscopy, viscosity measurement, solubility tests, and softening points.
    Additional Material: 3 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pola.1989.080271007
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  • 9
    Electronic Resource
    Electronic Resource
    Kinetics and Mechanism of Sonochemical decomposition of aqueous bromoform solution (1964)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 26 (1964), S. 140-146 
    Details
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Ultrasonic waves obtained from MULLARD's high frequency ultrasonic generator type E-7562 with a barium titanate transducer having a frequency of I Mc./sec. were employed to study the sonochemical decomposition of aqueous bromoform solution. At constant R. F. output (about 1.7 Kv) to the crystal, the reaction was found to obey the Zero-order kinetics with average velocity constants in standard unit as follows: \documentclass{article}\pagestyle{empty}\begin{document}$$ \begin{array}{*{20}c} {{\rm K}_{\rm 8} \left({{\rm Br}_{\rm 2},{\rm Br}^ - } \right) = 8.211 \cdot 10^{ - 5} {\rm gm}{\rm .eq}{\rm .lit}{\rm .}^{ - 1} {\rm min}{\rm .}^{ - 1} } \hfill \\[6pt] {{\rm K}_{\rm 8} \left({{\rm Br}_{\rm 2} } \right)\;\; = 4.182 \cdot 10^{ - 5} {\rm gm}{\rm .eq}{\rm .lit}{\rm .}^{ - 1} {\rm min}{\rm .}^{ - 1} } \hfill \\\end{array} $$\end{document} Effects of bulk and ultrasonic intensity have also been demonstrated. The rate of reaction at different dilutions of aqueous bromoform solution and also at different intensities has been investigated conductometrically. A probable mechanism of the reaction was also presented.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19640260306
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  • 10
    Electronic Resource
    Electronic Resource
    Phosphatidylcholine and phosphatidylinositol-specific phospholipases C of bull and rabbit spermatozoa (1992)
    New York, NY [u.a.] : Wiley-Blackwell
    Molecular Reproduction and Development 33 (1992), S. 281-286 
    Details
    ISSN: 1040-452X
    Keywords: Sperm (bull, rabbit) ; Plasma membranes ; Acrosomal membranes ; Phosphatidylinositol specific phospholipase C ; Phosphatidyl choline specific phospholipase C ; Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology
    Notes: Acrosomal reaction is an essential prerequisite to fertilization. The changes in lipid composition of sperm membranes cause fusion of the plasma and outer acrosomal membranes that results in the exocytosis of acrosomal contents. We report that both bull and rabbit spermatozoa contain a phosphatidylcholine-specific phospholipase C (PC-PLC) that hydrolyzes L-α-dipalmitoyl-(choline-methyl-14C-153.0 Ci/mmol and a phosphatidyl-inositol-specific phospholipase C (Pl-PLC)) that hydrolyzes L-α-(Myo)-lnositol-2-3H (N)-5.2 Ci mmol. Pl-PLC from bull sperm acrosome has been purified 568 × fold with a specific activity 6.25 ± 0.6 nmol/min/mg protein, km 0.004 mM, and Vmax 12 nmol/min/mg protein. Both enzymes had optimum at pH 7.5. The activity of PC-PLC remained unaffected by varying concentrations of Ca2+, whereas Pl-PLC activity was significantly increased. The bulk of Pl-PLC was found to be associated with inner acrosomal membrane of bull and rabbit sperm, while PC-PLC was found in the outer acrosomal membranes in the bull sperm and the plasma membrane of the rabbit sperm. Both enzymes are compartmentalized in sperm cell. © 1992 Wiley-Liss, Inc.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mrd.1080330308
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