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  • Chemistry  (285)
  • MATERIALS, NONMETALLIC
  • 1975-1979  (104)
  • 1965-1969  (102)
  • 1960-1964  (83)
  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für die chemische Industrie 72 (1960), S. 413-415 
    ISSN: 0044-8249
    Keywords: Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Alkali-dititanate tauschen ihre Kationen gegen langkettige Alkylammonium-lonen aus, die unter Aufweitung des Gitters in Richtung der c-Achse zwischen die Ti2O5-Anionenschichten eingebaut werden. Die Alkylammonium-dititanate gehen mit vielen Verbindungen eindimensionale, innerkristalline Quellung ein. Die Moleküle des Quellungsmittels werden unter weiterer Gitteraufweitung in C-Richtung geordnet zwischen die Schichten eingebaut, so daß Schichteinschlußverbindungen definierter Zusammensetzung entstehen.
    Additional Material: 2 Ill.
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  • 2
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für die chemische Industrie 74 (1962), S. 119-119 
    ISSN: 0044-8249
    Keywords: Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für die chemische Industrie 73 (1961), S. 707-707 
    ISSN: 0044-8249
    Keywords: Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 1 Tab.
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  • 4
    Electronic Resource
    Electronic Resource
    Hoboken, NJ : Wiley-Blackwell
    Journal of Biomedical Materials Research 10 (1976), S. 571-581 
    ISSN: 0021-9304
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Medicine , Technology
    Notes: A cementable endosteal blade implant has been developed and evaluated. Inherent in the design are the following factors: minimization of stress concentrators, ease of implantation, and high resistance to loosening. Other potential advantages of this design as compared with conventional endosteal blade implants include reduced hazards of postoperative infection and reduced likelihood of metallic corrosion.Six conventional endosteal implants and six cementable implants were installed in steer mandibles using standard dental surgical techniques and Simplexbrand methyl methacrylate bone cement. They were loaded in uniaxial compression at a loading rate of 0.0122 in./min. The stiffness (S), deformation at 900-lb load (D900), proportional limit (PL), and load at 0.04 in. deformation (L0.04) were calculated for each test.The cementable design showed a twofold increase in stiffness, only 17% of the deformation at 900 lb, more than twice the proportional limit, and at least twice the load at 0.04 in. deformation when compared with similar values for the conventional endosteal implants.This study reveals that, in addition to being unstable in bone, conventional endosteal implants are also unstable when used with acrylic bone cement. The new design should eliminate most of the problems associated with endosteal blade implantation.
    Additional Material: 6 Ill.
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  • 5
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Angewandte Chemie International Edition in English 1 (1962), S. 115-115 
    ISSN: 0570-0833
    Keywords: Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 311 (1961), S. 151-179 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Aqueous solutions of o-dihydroxy-arylenes react with colloidal silicic acid, solid SiO2 or even quartz forming dimeric silicic acid esters with a content of three moles of arylene per silicium (arylene components see „Inhaltsübersicht“). The properties of these esters are described.The thermal decompositions of some esters have been investigated.
    Notes: o-Dihydroxyarylene reagieren in wässerigen Lösungen mit Kieselsäuresol oder festem SiO2, selbst mit Quarz unter Bildung von beständigen Kieselsäureestern. Verbindungen mit den folgenden o-Dihydroxyarylen-Komponenten wurden dargestellt: Brenzcatechin, Methylbrenzcatechin, 3,4-Dihydroxybenzaldehyd, 3,4-Dihydroxybenzoesaure 2,3-Dihydroxybenzoesäure, 2,3-Dihydroxynaphthalin, Pyrogallol, Gallussäure, Alizarin, Purpurin, Quercetin und Gerbsäure. Das Verhältnis o-Dihydroxykomponente: Silicium ist 3 : 1. Die Ester sind dimer.Die Produkte des thermischen Abbaus einiger Kieselsäureester werden untersucht.Isotypiebetrachtungen und Mischkristallbildung mit den entsprechenden Verbindungen von Titan, Germanium, Zinn und Zirkon legen die Vermutung nahe, daß in den Salzen der Hexa-dihydroxy-bis-Kieselsäureester die Siliciumatome die Koordinationszahl 6 gegen Sauerstoff betätigen.
    Additional Material: 2 Ill.
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  • 7
    Electronic Resource
    Electronic Resource
    New York : Wiley-Blackwell
    Biopolymers 5 (1967), S. 697-713 
    ISSN: 0006-3525
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: We have generated solutions to the Lamm equation to examine the effects of concentration dependence on velocity experiments. Two forms of c dependence are considered: s/s0 = 1 - kc and s/s0 = (1 + kc)-1. Features of these solutions are discussed. The magnitude of the errors resulting from the usual procedure of measuring the rate of movement of schlieren maxima or of the position at which the concentration is one half the plateau value have been examined. These errors are usually negligible after sufficient centrifugation time. The errors in using the half-plateau concentration are less than those using the movement of the peak. We have also examined a technique due to Fujita for determining D from boundary spreading when s/s0 = (1+kc)-1. This method is satisfactory when s/s0 is actually of this form, or under certain limitations when s/s0 = (1 + kc)-1. Creeth has shown that under certain conditions the concentration gradient, curve remains virtually unchanged in shape after separating from the meniscus. When this occurs it is possible to estimate s/D from the data. The condition for such a steady state is that kc0 be sufficiently large. Numerical confirmation of this method is presented in the final section.
    Additional Material: 15 Ill.
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  • 8
    ISSN: 0006-3525
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The Lamm equation has been solved numerically for conditions corresponding to equilibrium runs for a nonlinear concentration dependence of the form s/s0 = (1 + kc)-1. It is shown that the approach to equilibrium is very close to being exponential (in time) as in the case k = 0. We also compare results for the nonlinear case given above with results obtained for linear c-dependence of the form s/s0 = 1 - kc. For relatively high speeds the time required to attain equilibrium may be greatly underestimated by use of the latter approximation. Finally, we present analytic approximations for the concentration distribution at equilibrium and as a function of time.
    Additional Material: 5 Ill.
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  • 9
    ISSN: 0006-3525
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: This paper gives an account, of the numerical technique used to derive results to he presented in future papers of this series.
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  • 10
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 95 (1962), S. 1155-1169 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Die Umsetzung von Eisencarbonylen mit Acetylen unter Druck ergibt eine Reihe von Stabilen Organo-eisencarbonylen mit ungesättigten Kohlenwasserstoffen bzw. Ketonen als organische Liganden. Daneben entstehen hauptsächlich schwerlösliche, wenig definierte Verbindungen, die zum Teil Hydrochinon und Cyclopentadienon in From von Komplexen enthalten. Die Strukturen von (C2H2)2Fe2(CO)6 und der zwei isomeren Verbindungen (C2H2)3Fe2(CO)6 werden diskutiert. Der thermische Abbau der beiden Komplexe führt zu substituierten Cyclopentadienyl-eisencarbonylen vom Typ (C5H5)2Fe2(CO)4. (C5H5)2Fe2(CO)4 und sein Methylderivat weisen nach Dipolmomentsbestimmungen in Benzol eine gefaltete Struktur auf.
    Additional Material: 2 Tab.
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