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  • Chemistry  (16)
  • Ureter  (2)
  • Iris  (1)
  • 1970-1974  (19)
  • 1
    Electronic Resource
    Electronic Resource
    Degeneration and regeneration of smooth muscle transplants in the anterior eye chamber (1971)
    Springer
    Cell & tissue research 117 (1971), S. 155-175 
    Details
    ISSN: 1432-0878
    Keywords: Smooth Muscle Transplants ; Vas deferens ; Bladder ; Ureter ; Wound healing
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Smooth muscle from small segments of the vas deferens, urinary bladder and the ureter of the guinea pig was transplanted into the anterior chamber of the eye. Some muscle cells had a normal appearance, but others showed morphological changes during the first few days following transplantation. Changes of two main kinds were observed: some cells contained aggregations of glycogen granules and lipid droplets; other cells were characterized by either a general increase in electron density of the cell with the presence of very thick filaments (which are, possibly, aggregates of thin filaments), or cells containing an electron-dense nucleus, ruptured cellular membranous systems and degenerating mitochondria. Following revascularisation, which commenced one to two days after transplantation, areas containing cells with an appearance similar to that of embryonic smooth muscle were apparent. Evidence of mitosis of smooth-muscle and other cell types was also noted, the most active period being five to ten days after transplantation. Bundles containing normal muscle cells were apparent by four weeks in these transplants. However, whole undissected transplants contained normal-looking muscle bundles after one week. These findings are discussed in relation to the repair of wounds to smooth muscle.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00330735
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  • 2
    Electronic Resource
    Electronic Resource
    Lanthanum nitrate in a smooth muscle membrane system (1974)
    Springer
    Cell & tissue research 147 (1974), S. 157-161 
    Details
    ISSN: 1432-0878
    Keywords: Smooth muscle ; Iris ; Lanthanum nitrate ; Sarcoplasmic reticulum ; Electron microscopy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Smooth muscle cells of the guinea-pig sphincter pupillae were fixed in the presence of 3% lanthanum nitrate. Although only small amounts of lanthanum were found in plasmalemmal vesicles, large deposits were present within a membrane system resembling sarcoplasmic reticulum. The significance of these findings is discussed in relation to the use of lanthanum nitrate as an extracellular tracer.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00582790
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  • 3
    Electronic Resource
    Electronic Resource
    Formation of fenestrated capillaries in mammalian vas deferens and ureter transplants (1972)
    Springer
    Cell & tissue research 134 (1972), S. 167-173 
    Details
    ISSN: 1432-0878
    Keywords: Fenestrated capillaries ; Transplantation ; Vas deferens ; Ureter ; Electronmicroscopy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary This paper discusses the possibility that fenestrated capillaries may be induced by the presence or action of epithelial cells. Fenestrations were shown to exist in a number of capillaries in close proximity to the epithelium in the in situ guinea-pig vas deferens and ureter. These results suggest further roles for the vas deferens and ureter than those previously conceived. Transplants of these tissues in the anterior eye chamber were, by two weeks, highly vascularized. Those transplants containing epithelium showed fenestrated capillaries in close proximity to these cells. However, in transplants which did not contain epithelial cells, no fenestrations were noted in capillaries.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00307150
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  • 4
    Electronic Resource
    Electronic Resource
    Polyelectrolyte complex of heparin with chitosan (1974)
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 175 (1974), S. 2209-2211 
    Details
    ISSN: 0025-116X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Additional Material: 2 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/macp.1974.021750724
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  • 5
    Electronic Resource
    Electronic Resource
    Polyelectrolyte complex of sodium dextran sulfate with chitosan (1974)
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 175 (1974), S. 3593-3596 
    Details
    ISSN: 0025-116X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Additional Material: 2 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/macp.1974.021751223
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  • 6
    Electronic Resource
    Electronic Resource
    Formaldehyde polymers, 15Part 14, cf.1.. Isolation and mass spectral behavior of 3,3′-methylenebis(5-methyl-1,2-phenyleneoxy)dipropionic acid and 3-{2,6-bis[2-(2-carboxyethoxy)-5-methylbenzyl]-4-methylphenoxy}propionic acid (1973)
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 174 (1973), S. 225-229 
    Details
    ISSN: 0025-116X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/macp.1973.021740119
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  • 7
    Electronic Resource
    Electronic Resource
    Electrochemical polymerization of acenaphthylene (1973)
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 173 (1973), S. 233-234 
    Details
    ISSN: 0025-116X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/macp.1973.021730116
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  • 8
    Electronic Resource
    Electronic Resource
    Electrochemical polymerization of acrylonitrile by a rectangular wave form current (1974)
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 175 (1974), S. 687-689 
    Details
    ISSN: 0025-116X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/macp.1974.021750227
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  • 9
    Electronic Resource
    Electronic Resource
    Studies on the structure of polyurethane elastomers, 4Part 3: cf.2.. NMR spectra of linear polyurethane based on 2,4-tolylenediisocyanate (1974)
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 175 (1974), S. 3425-3436 
    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: Es wird gezeigt, daß Harnstoff- und Carbamoyl-(Urethan-)Gruppierungen in 2,4-Tolylendiisocyanat(1)-Derivaten durch ihre verschiedene chemische Verschiebung unterschieden werden können, wenn NMR-Messungen in N,N-Dimethylacetamid durchgeführt werden, das LiCl enthält. Die Methode kann ferner für die Analyse von Polyurethan Präpolymeren, dargestellt aus α-(Hydroxytetramethylen)-ω-hydroxypoly(oxytetramethylen) (2) und 1, angewandt werden.
    Notes: It is shown that urea and carbamoyl (urethane) groups in derivatives of 2,4-tolylenediisocyanate (1) can be differentiated by their chemical shifts when the NMR measurements are carried out in N,N-dimethylacetamide (DMA) which contains lithium chloride. This method can further be applied to the analysis of linear polyurethane prepolymers prepared from α-(hydroxytetramethylene)-ω-hydroxypoly(oxytetramethylene) (2) and 1.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/macp.1974.021751209
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  • 10
    Electronic Resource
    Electronic Resource
    Photodegradation behavior of some vinyl ketone copolymersPresented at the 5th Meeting of the Japan Industrial Technology Association, Japan, Tokyo, September 27, 1971. (1973)
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 164 (1973), S. 159-169 
    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: Das lichtinduzierte Zersetzungsverhalten von Copolymeren aus Styrol (St), α-Methylstyrol (α-MSt) und Methacrylsäuremethylester (MMA) mit Methylvinylketon (MVK) und Phenylvinylketon (PVK) wurde in Gegenwart von Luft im festen Zustand und in Lösung untersucht.Die Photolyse von St/MVK- oder St/PVK-Copolymeren erfolgt rasch, und mit zunehmendem Gehalt an Ketogruppen im Copolymeren steigt die Geschwindigkeit der Zersetzung.Im allgemeinen zersetzen sich St/PVK-Copolymere schneller als St/MVK-Copolymere. Die Zersetzung erfolgt wahrscheinlich hauptsächlich nach einem NORRISH-Mechanismus (Typ II).Die Photolyse von α-MSt/PVK-Copolymeren erfolgte erheblich langsamer als die von St/PVK-Copolymeren.Ein unerwartetes Verhalten zeigten MMA/MVK- und MMA/PVK-Copolymere. Diese Copolymeren zersetzten sich sehr schnell, obwohl man eine langsame Zersetzung erwartet hätte. Zur Erklärung dieses Phänomens wurden einige Experimente durchgeführt.
    Notes: Photodegradation behavior for copolymers of styrene (St), α-methyl styrene (α-MSt) and methyl methacrylate (MMA) with methyl vinyl ketone (MVK) and phenyl vinyl ketone (PVK) in the presence of air was investigated in the solid state and in solution.Photolysis of St/MVK and St/PVK copolymers proceeded smoothly and an increase of the ketone in the copolymer resulted in an increase of the rate of degradation. Generally, the rate of degradation is faster in St/PVK copolymers than in St/MVK copolymers. It is likely that the degradation of the copolymers takes place mainly through NORRISH type II reaction.It was found that the photolysis of α-MSt/PVK copolymers was retarded considerably as compared with St/PVK copolymers.An unexpected behavior was observed in the case of MMA/MVK or MMA/PVK copolymers. These copolymers were expected to degrade with slow rates; they degraded, however, rapidly. Some experiments were done to explain this phenomenon.
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/macp.1973.021640116
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