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  • 1
    Electronic Resource
    Electronic Resource
    Synthesis and characterization of some mixed-ligand cyanonitrosyl-{CrNO}5 complexes of chromium with some potentially mono-, bi- and tridentate ligands (1988)
    s.l. : American Chemical Society
    Journal of chemical & engineering data 33 (1988), S. 215-216 
    Details
    ISSN: 1520-5134
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/je00052a044
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  • 2
    Electronic Resource
    Electronic Resource
    Study of the anharmonic properties of copper halides (1987)
    Springer
    Il nuovo cimento della Società Italiana di Fisica 9 (1987), S. 1253-1264 
    Details
    ISSN: 0392-6737
    Keywords: General theory
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Description / Table of Contents: Riassunto Abbiamo studiato le proprietà anarmoniche degli alogenuri di rame per mezzo di un potenziale d’interazione a tre corpi per includere gli effetti di van der Waals. A questo scopo, sono state calcolate le costanti elastiche di terzo ordine e le derivate della pressione delle costanti elastiche del secondo ordine dopo avere dedotto le loro espressioni corrette dal suddetto potenziale seguendo le linee di Sharma e Verma. I nostri risultati, generalmente, hanno seguito un orientamento sistematico e hanno dato una previsione soddisfacente dei dati sperimentali disponibili sulle proprietà anarmoniche degli alogenuri di rame. Lo scopo dell’applicazione di questo potenziale è di descrivere le proprietà dielettriche e dinamiche di questi alogenuri.
    Abstract: Резюме Мы исследуем ангармонические свойства галогенидов меди, используя трехчастичный потенциал взаимодействия, который учитывает эффекты Ван-дер-Ваальса. Для этой цели мы вычисляем упругие постоянные третьего порядка и производные по давлению от упругих постоянных второго порядка, исходя из выражений, полученных с помоцью предложенного потенциала. Наши результаты дают удовлетворительное согласие с имеющимися экспериментальными данными для ангармонических свойств галогенидов. Предложенный потенциал предлолагается использовать для описания динамических и диэлектрических свойств галогенидов меди.
    Notes: Summary We have investigated the anharmonic properties of cooper halides by means of a three-body interaction potential extended to include the van der Waals effects. For this purpose, we have computed the thirdorder elastic constants and the pressure derivatives of second-order elastic constants after deriving their correct expressions from the present potential following the lines of Sharma and Verma. Our results have, generally, followed a systematic trend and given a satisfactory prediction of the available experimental data on the anharmonic properties of copper halides. This potential has as scope of its application to describe the dynamical and dielectric properties of these halides.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02454726
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  • 3
    Electronic Resource
    Electronic Resource
    Pressure dependence of the compressibility of alkali halides (1985)
    Springer
    The European physical journal 58 (1985), S. 83-89 
    Details
    ISSN: 1434-6036
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The parameterC 1=[∂(1/K T )/∂P] T , which describes the pressure variation of the compressibility, has been examined correlating the thermodynamical and interatomic potential approaches employing fewer approximations than has been usual heretofore. General expressions have been derived forC 1 by including the thermal correction terms, which have generally been ignored in previous studies concerning thermal properties of ionic crystals. The parameterC 1 has also been related to the Grüneisen parameter, γ, using a relation given earlier. The applicability of the derived equations is investigated and discussed for alkali halides employing few realistic potential forms. A good general accord is found with the available experimental data, which exhibits an essential improvement over other theoretical determinations.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01304258
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  • 4
    Electronic Resource
    Electronic Resource
    Free vibrations of an isotropic nonhomogeneous infinite plate of linearly varying thickness (1983)
    Springer
    Meccanica 18 (1983), S. 30-33 
    Details
    ISSN: 1572-9648
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Description / Table of Contents: Summary The free transverse vibrations of an isotropic nonhomogeneous infinite plate of variable thickness have been studied on the basis of classical plate theory. The governing differential equation of motion has been solved by Frobenius method by expressing the transverse displacement as an infinite series. The frequencies corresponding to the first two modes of vibration are computed for different values of thickness variation constant, nonhomogeneity parameter, and different combinations of boundary conditions.
    Notes: Sommario Viene considerato il problema delle vibrazioni flessionali libere di una lastra infinita, isotropa, non omogenea, di spessore variabile. L'equazione del moto è stata risolta col metodo di Frobenius, esprimendo lo spostamento mediante sviluppo in serie. Sono state calcolate le prime due au to frequenze per varie combinazioni delle condizioni ai limiti e per differenti valori dei parametri caratteristici della variazione di spessore e della disomogeneità.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02156098
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  • 5
    Electronic Resource
    Electronic Resource
    Natural frequencies of a non homogeneous isotropic elastic infinite plate of variable thickness resting on elastic foundation (1984)
    Springer
    Meccanica 19 (1984), S. 320-324 
    Details
    ISSN: 1572-9648
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Description / Table of Contents: Summary The dynamic free response of a nonhomogeneous isotropic elastic infinite plate of parabolically varying thickness resting on an elastic foundation has been studied. The frequencies, deflections and moments corresponding to the first five modes of vibration have been computed for the two combinations of boundary conditions, clamped-clamped (C-C) and clamped-simply supported (C-SS) and various values of taper constant, nonhomogeneity parameter and foundation modulus by applying the method of Frobenius for the solution of the governing differential equation of motion.
    Notes: Sommario Si sono studiate le oscillazioni libere di una piastra elastica infinita, non omogenea, isotropa, di spessore parabolicamente variabile, poggiata su un suolo elastico. Applicando il metodo di Frobenius per la soluzione della equazione differenziale del moto si sono calcolate le frequenze, le deformate ed i momenti corrispondenti ai primi cinque modi di vibrazione per due combinazioni di condizioni al contorno, incastro-incastro ed incastro-appoggio e diversi valori della rastremazione, del parametro di non omogeneità e del modulo del suolo.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01556330
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  • 6
    Electronic Resource
    Electronic Resource
    Mössbauer, magnetic and ir studies of some mononuclear Fe(III) complexes (1986)
    Springer
    Hyperfine interactions 28 (1986), S. 821-824 
    Details
    ISSN: 1572-9540
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Mössbauer studies at room temperature and down to liquid nitrogen temperature were supplemented with magnetic and infrared studies of Monochloroferricbis (X-benzoate) and monochloroferricbis (X-chloroacetate). Mössbauer parameters indicate that all the complexes possess high spin configuration in the trivalent and monomeric states. Positive value of Vzz indicates that there is more negative charge in the x-y plane than in along z-axis, suggesting that Fe is penta-coordinated. Molecular weight determination also confirms that the complexes are mononuclear. The effective magnetic moment of the complexes points out to a weak field iron configuration. An attempt has been made to interpret the structure of these complexes on the basis of the measured data.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02061571
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  • 7
    Electronic Resource
    Electronic Resource
    Temperature and pressure variation of the recoilless fraction for119Sn:Pd Mössbauer system (1986)
    Springer
    Hyperfine interactions 29 (1986), S. 1381-1384 
    Details
    ISSN: 1572-9540
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The variation of the recoilless fraction ‘f’ as a function of temperature and pressure of119Sn embedded as a dilute impurity in palladium (Pd) host has been calculated after incorporating the changes in the force constant and mass at the impurity site using Debye model and phonon frequency spectrum (pfs). The comparison of the results have been made with the available experimental values.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02399491
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  • 8
    Electronic Resource
    Electronic Resource
    Copolymerization of styrene with [(2-methacryloyloxy)propoxy]trialkyl(aryl) silanes (1983)
    New York : Wiley-Blackwell
    Journal of Polymer Science: Polymer Chemistry Edition 21 (1983), S. 1347-1359 
    Details
    ISSN: 0360-6376
    Keywords: Physics ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Styrene was copolymerized with [(2-methacryloyloxy)propoxy]-trimethylsilane (2-MAPTMS), [(2-methacryloyloxy)propoxy]-dimethylphenylsilane (2-MAPDMPS), and [(2-methacryloyloxy)-propoxy]-diphenylmethyl silane (2-MAPDPMS) in toluene at temperatures between 60 and 90°C using azobisisobutyronitrile (AIBN) as initiator. The compositions of the copolymers were determined by silicon estimation. The reactivity ratios were calculated by the Kelen-Tüdös method. The reactivity ratio r1 (styrene) is higher for styrene-2-MAPDPMS than for the styrene-2-MAPDMPS and styrene-2-MAPTMS copolymerzation system. The difference between the activation energies E11 - E12 favors self-propagation of the polystyryl radical, whereas the ratio of preexponential factors A11/A12 favors cross propagation. For the 2-MAPTMS radical, the difference E22 - E21 favors cross propagation but the ratio A22/A21 favors self-addition. The intrinsic viscosities and the theramal behavior of the copolymers were also studied.
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1983.170210510
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  • 9
    Electronic Resource
    Electronic Resource
    Effect of silicon comonomers on thermal degradation of polystyrene (1985)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 30 (1985), S. 4287-4295 
    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: The thermal degradation of the following organosilicon copolymers: styrene-vinylmethyl-diacetoxysilane, styrene-2-methacryloyloxypropoxytrimethyl silane, styrene-(dimethyl) siloxane-methylvinylsiloxane) diol and hexamethyl cyclotrisiloxane-styrene-hexamethyl cyclotrisiloxane was investigated. The techniques of thermogravimetry, thermomechanical analysis, and differential scanning calorimetry (DSC) were used. The initial decomposition temperature for all the copolymers except styrene-siloxane block copolymers was less than that for polystyrene irrespective of the nature of the silicon comonomer. Integral procedural decomposition temperature of copolymers was higher than that for polystyrene except styrene-2-methacryloyloxy propoxytrimethyl silane copolymers which were showing lower (IPDT) values. Styrene-siloxane copolymers were found to be most thermally stable. Variation in the glass transition temperature and probe displacement under stress is related to the polarity of the silicon moiety in the styrene copolymers.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1985.070301107
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  • 10
    Electronic Resource
    Electronic Resource
    Inhibition of discoloration in acrylic polymers (1990)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 39 (1990), S. 1821-1826 
    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
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1990.070390819
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