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  • 1
    Electronic Resource
    Electronic Resource
    Release and properties of endothelium-derived relaxing factor (EDRF) from endothelial cells in culture (1985)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Cellular Physiology 123 (1985), S. 310-320 
    Details
    ISSN: 0021-9541
    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Medicine
    Notes: Cultured bovine endothelial cells were seeded onto the intimal surface of endothelium-denuded rings of canine coronary artery. These rings did not previously relax to acetylcholine, substance P, bradykinin, and A23187. After seeding, the same rings relaxed to bradykinin and A23187, but not to acetycholine or substance P. Indomethacin pretreatment did not affect these responses. Cells from the same source were then grown to confluence on microcarrier beads, poured into small columns, and perfused with Krebs+ solution. The perfusate from the columns was bioassayed on endothelium-denuded rings of coronary artery from either the dog or pig. Challenge of the column in the presence of indomethacin with either bradykinin or A23187 as well as acetylcholine or substance P caused release of a substance that relaxed both types of artery. Its activity half-life was 6.4 ± 0.4 sec at 37°C and it was hydrophilic and negatively charged. Prostacyclin (PGI2) as a candidate for EDRF was ruled out because (1) indomethacin failed to block its release and (2) the pig coronary artery, although insensitive to PGI2, relaxed to the endothelium-derived substance. These results show that, in response to a number of dilator drugs, cultured endothelial cells release a vascular relaxing substance (EDRF) that has characteristics similar to the EDRF of normal endothelium. The chemical nature of EDRF awaits clarification.
    Additional Material: 12 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jcp.1041230304
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  • 2
    Electronic Resource
    Electronic Resource
    Asbestverstärkte Phenolharze als Werkstoffe für den chemischen ApparatebauVortrag, gehalten anläßlich der Achema-Tagung 1970 in Frankfurt a. M. (1971)
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 22 (1971), S. 219-221 
    Details
    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: Asbestos-phenolic resin laminates as primary materials of construction for chemical plant and equipmentThe application potential of asbestosphenolic resin laminates is determined by their processing properties which are favourably influenced e.g. by chrysotile fibres, or by the chemical resistance which is obtained by another species of asbestos, crocidolite, which is also used for acid resistant packings. The combination of these fibres and special phenoplastic materials has yielded materials which can be machined like wood and which can therefore be used for a number of applications. Some examples are stirrers for reaction vessels, tube components and tubes with moulded-on flanges, container lids, valves, stopcocks, pumps. The chemical resistance of the resin can be increased considerably by curing at high temperature and pressure. The resins are also completely resistant to solvents at practically any admissible working temperature. The resistance to sulfuric acid extends to 90°C, above that temperature and - in fuming acid at room temperature - the resin is sulfonated.
    Notes: Die Verwendbarkeit von asbestverstärkten Phenolharzen wird bestimmt durch die Verarbeitbarkeit, die z. B. durch Chrysotilfasern günstig beeinflußt wird, oder durch die chemische Beständigkeit, die durch eine andere Form des Asbests, den Crocidolit, erzielt wird, der auch zur Herstellung von säurefesten Packungen dient. Mit der Kombination dieser Fa-sern und spezieller Phenoplaste ist es gelungen, Werkstoffe zu entwickeln, die sich etwa wie Holz bearbeiten lassen und daher für zahlreiche Anwendungen geeignet sind. Beispiele hierfür sind Rührer für chemische Reaktionsgefäße, Rohrleitungskomponenten bzw. Rohre mit angesetzten Flanschen, Behälterdeckel. Ventile, Hähne, Pumpen. Die chemische Beständigkeit des Harzes kann durch Aushärten bei hohen Temperaturen und Drucken beträchtlich gesteigert werden. Die Harze sind auch gegen Lösungsmittel bei praktisch allen möglichen Anwendungstemperaturen voll beständig. Die Beständigkeit gegen Schwefelsäure geht bis 90°C, darüber - sowie in rauchender Säure hei Raumtemperatur wird jedoch das Harz sulfuriert.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/maco.19710220305
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  • 3
    Electronic Resource
    Electronic Resource
    Condensation polymers from diisocyanates and dioximes (1959)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 2 (1959), S. 81-85 
    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: Diisocyanates condense readily with the two active hydrogen atoms in dioximes to give high molecular weight linear condensation polymers. In several cases these polymers, such as the one from cyclohexanedione dioxime and 4,4′-biphenylene diisocyanate, may be converted to tough films or fibers. Thermal, hydrolytic, and light stability of these polymers were in general poor.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1959.070020412
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  • 4
    Electronic Resource
    Electronic Resource
    Condensation polymers from diisocyanates with dihydrazides and hydrazine (1959)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 2 (1959), S. 155-162 
    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: Diisocyanates condense readily with hydrazine or hydrazine hydrate to give polyureylenes with the structure: \documentclass{article}\pagestyle{empty}\begin{document}$$ \left[ \hbox{---} {\rm R} \hbox{---} {\rm NHCONHNH} \hbox{---} {\rm CONH} \hbox{---} \right]_x $$\end{document} Similarly, dihydrazides (NH2NH—COR′CONHNH2) condense with diisocyanates to give polymers with the structure: \documentclass{article}\pagestyle{empty}\begin{document}$$ \left[ \hbox{---} {\rm R} \hbox{---} {\rm NHCONHNH} \hbox{---} {\rm COR'} \hbox{---} {\rm CONHNHCONH} \hbox{---} \right]_x $$\end{document} Tough films and fibers can be prepared from these polymers by conventional techniques. Solutions of some of these polymers are relatively unstable at elevated temperatures, the polymer apparently reverting to starting materials. Attempts to stabilize the solutions were unsuccessful.
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1959.070020504
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  • 5
    Electronic Resource
    Electronic Resource
    The relationship between structure and properties of crystalline, high-melting polyhydrocarbons (1959)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 1 (1959), S. 73-83 
    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: Twenty-two α-olefin monomers with varying degrees and types of branching in the lateral group have been polymerized and the polymers characterized. In general, the closer the branching in the side chain is to the polyethylene trunk, the higher the degree of crystallinity and the crystalline melting point. The degree of branching and the symmetry of the branches also affects the melting point and crystallinity markedly. Relationships have been drawn between type and position of the branch and melting point.
    Additional Material: 11 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1959.070010113
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  • 6
    Electronic Resource
    Electronic Resource
    The relationship between structure and properties of crystalline, high-melting polyhydrocarbons (1961)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 5 (1961), S. S6 
    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
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1961.070051420
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  • 7
    Electronic Resource
    Electronic Resource
    Poly(4-methyl-1-pentene) and some soluble crystalline copolymers (1961)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 5 (1961), S. 184-190 
    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: Poly(4-methyl-1-pentene) has been prepared by polymerizing the monomer over a catalyst made from titanium tetrachloride and lithium aluminum tetradecyl. The molecular weight of the crystalline polymer was invariably too high for fiber preparation, even when polymerization variables were varied drastically, so a technique for thermal cracking was developed. By heating grease-free, crystalline poly(4-methyl-1-pentene) in a vacuum at about 280°, it was possible to lower smoothly the molecular weight of the polymer to any desired value, without undesirable crosslinking or by-product formation. The polymer was melt-spun by conventional techniques to highly oriented, tough fibers. Copolymerization of 10-25% 1-hexene and other linear 1-olefins with 4-methyl-1-pentene gives products which are still high-melting, but which are readily soluble in such solvents as cyclohexane or chloroform, in contrast to the homopolymer which is only slightly soluble. Polymerization in solvents for the copolymer gave solutions which were converted to fibers and film without intermediate isolation of polymer or removal of the catalyst. An interesting terpolymer in which divinylbenzene was the third component was found to be initially soluble, but was readily crosslinked at elevated temperature.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1961.070051409
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  • 8
    Electronic Resource
    Electronic Resource
    A monoclonal antibody to the Ca2+ -ATPase of cardiac sarcoplasmic reticulum cross-reacts with slow type I but not with fast type II canine skeletal muscle fibers: An immunocytochemical and immunochemical study (1988)
    New York, NY : Wiley-Blackwell
    Cell Motility and the Cytoskeleton 9 (1988), S. 164-174 
    Details
    ISSN: 0886-1544
    Keywords: Ca2+-ATPase of sarcoplasmic reticulum ; immunofluorescence ; myofibers types I (slow) and II (fast) ; II D8 monoclonal antibody ; II H11 monoclonal antibody ; Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Medicine
    Notes: Ca2+ -ATPase of the sarcoplasmic reticulum was localized in cryostat sections from three different adult canine skeletal muscles (gracilis, extensor carpi radialis, and superficial digitalis flexor) by immunofluorescence labeling with monoclonal antibodies to the Ca2+ -ATPase Type I (slow) myofibers were strongly labeled for the Ca2+ -ATPase with a monoclonal antibody (II D8) to the CA2+ -ATPase of canine cardiac sarcoplasmic reticulum; the type II (fast) myofibers were labeled at the level of the background with monoclonal antibody II D8. By contrast, type II (fast) myofibers were strongly labeled for Ca2+ -ATPase of rabbit skeletal sarcoplasmic reticulum. The subcellular distribution of the immunolabeling in type I (slow) myofibers with monoclonal antibody II D8 corresponded to that of the sarcoplasmic reticulum as previously determined by electron microscopy. The structural similarity between the canine cardiac Ca2+ -ATPase present in the sarcoplasmic reticulum of the canine slow skeletal muscle fibers was demonstrated by immunoblotting. Monoclonal antibody (II D8) to the cardiac Ca2+ -ATPase binds to only one protein band present in the extract from either cardiac or type I (slow) skeletal muscle tissue. By contrast, monoclonal antibody (II H11) to the skeletal type II (fast) Ca2+ -ATPase binds only one protein band in the extract from type II (fast) skeletal muscle tissue. These immunopositive proteins coelectrophoresed with the Ca2+ -ATPase of the canine cardiac sarcoplasmic reticulum and showed an apparent Mr of 115,000. It is concluded that the Ca2+ -ATPase of cardiac and type I (slow) skeletal sarcoplasmic reticulum have at least one epitope in common, which is not present on the Ca2+ -ATPase of sarcoplasmic reticulum in type II (fast) skeletal myofibers. It is possible that this site is related to the assumed necessity of the Ca2+ -ATPase of the sarcoplasmic reticulum in cardiac and type I (slow) skeletal myofibers to interact with phosphorylated phospholamban and thereby enhance the accumulation of Ca2+ in the lumen of the sarcoplasmic reticulum following β-adrenergic stimulation.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cm.970090208
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  • 9
    Electronic Resource
    Electronic Resource
    Crystal nucleation in polypropylene injection-moulding resins containing fibrous fillers (1984)
    Weinheim : Wiley-Blackwell
    Angewandte Makromolekulare Chemie 122 (1984), S. 61-65 
    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: Spritzgußteile enthalten Restspannungen und molekulare Orientierung, die bei der Bestimmung der Eigenschaften einflußreich sind. Wenn ein faseriger Füllstoff anwesend ist, werden Größe und Verteilung von Restspannung und molekularer Orientierung verändert, bei teilkristallinen Polymermatrices wird die Morphologie ebenfalls verändert. Diese Thematik wurde von Misra et al.1 kürzlich untersucht, und ihre Ansichten werden hier diskutiert. Wir schlagen vor, daß einige Effekte, die sie auf Restspannung zurückführen, besser durch die molekulare Orientierung erklärt werden.
    Notes: Injection mouldings contain residual stress and molecular orientation and both are influential in determining properties. When a fibrous filler is present the magnitude and distribution of residual stress and molecular orientation are modified and, with semi crystalline polymer matrices, the crystal morphology is also modified. This subject has been studied recently by Misra et al.1 and their views are discussed here. We propose that some of the effects they attribute to residual stress are better explained with reference to molecular orientation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/apmc.1984.051220107
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  • 10
    Electronic Resource
    Electronic Resource
    Observation of morphology of polystyrenic materials using oxygen plasma etching (1991)
    Bognor Regis [u.a.] : Wiley-Blackwell
    Journal of Polymer Science Part B: Polymer Physics 29 (1991), S. 1031-1034 
    Details
    ISSN: 0887-6266
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/polb.1991.090290814
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