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  • 1
    Electronic Resource
    Electronic Resource
    s.l. ; Stafa-Zurich, Switzerland
    Advanced materials research Vol. 26-28 (Oct. 2007), p. 885-888 
    ISSN: 1662-8985
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Hydrogen storage materials are attracting much attention as media of storing hydrogen.High-pressure synthesis has been widely used for exploration of novel materials. We have reportedthat many new Mg-based hydrides or alloys have been synthesized by anvil-type apparatus underthe pressure of GPa-order. In Mg - TM ( TM = Nb, Ta ) - H systems, it was reported that novelFCC-type hydride which is similar in crystal structure and composition to Mg7TiH13-16 wassynthesized under 8 GPa. On the other hand, there is few reports of novel Ca-based hydrides to besynthesized under high pressure. However, the compressibility of calcium is higher than that ofmagnesium. Thus, there is a tendency for Ca compounds to be synthesized by lower pressure thanMg ones.This study describes the synthesis of new Ca-based hydrides by this high-pressure techniques. InCa - TM ( TM = Ti, Hf, V, Nb and Ta ) systems, the influence of applied pressure on present phaseswere investigated. For the composition of CaH2 - 14.3 mol%ZrH2 in Ca - Zr - H system, novelhydride was synthesized at 1073 K for 2 h under 5 GPa. Crystal structure of the novel hydride wasfound to be FCC-type with a lattice parameter of a = 0.531 nm. In addition, the thermal stability andhydrogen contents of this novel hydride were investigated.In Ca - Hf - H system, the unknown phase was observed in the sample of CaH2 - 12.5 mol%HfH2prepared 1073 K for 2 h under 5 GPa. This unknown phase is FCC structure with lattice parameterof a = 0.528(2) nm
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Il nuovo cimento della Società Italiana di Fisica 3 (1984), S. 193-203 
    ISSN: 0392-6737
    Keywords: Chemical kinetics ; Ultrasonic relaxation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Description / Table of Contents: Riassunto Le proprietà meccaniche e dinamiche di varie membrane sono state studiate col metodo della risonanza ultrasonica. La compressibilità delle membrane era nell'intervallo da 2.5·10−11 a 5·10−11 cm2/dyn e influenzata da molti fattori come la transizione, l'incorporazione di colesterolo o proteine e la configurazione delle proteine. Il rilassamento ultrasonico è stato misurato per due sistemi di membrane: il bistrato di dipalmitolfosfatidilcolina e la membrana del reticolo sarcoplasmatico. I risultati indicano che le misurazioni ultrasoniche sono molto sensibili alla transizione coordinata nei bistrati dei lipidi e al rilassamento di membrane biologiche che contengono proteine intrinseche.
    Abstract: Резюме Испольуя метод ультразвукового резонанса, исследуются механические и динамические свойства различных мембран. Сжимаемость мембран находится в области от 2.5·10−11 до 5·10−11 см2/дин и зависит от нескольких факторов, таких как фазовый переход, включение холестерола или протеинов и конфигурация протеинов. Измеряется релаксация улстразвука для двух мембранных систем. Полученные результаты показывают, что ультразвуковые измерения очень чувствительны к кооперативному переходу в липидных двойных слоях, а также релаксации биомембран; содержащих собственные протеины.
    Notes: Summary The mechanical and the dynamic properties of various membranes were studied by the ultrasonic-resonance method. The compressibility of the membranes was in the range from 2.5·10−11 to 5·10−11 cm2/dyn and influenced by several factors such as phase transition, incorporation of cholesterol or proteins and configuration of proteins. The ultrasonic relaxation was measured for two membrane systems, dipalmitoylphosphatidylcholine bilayer and sarcoplasmic-reticulum membrane. The results indicated that the ultrasonic measurements are very sensitive to the co-operative transition in lipid bilayers as well as the relaxation of biological membranes containing intrinsic proteins.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Palo Alto, Calif. : Annual Reviews
    Annual Review of Biophysics and Biomolecular Structure 19 (1990), S. 69-82 
    ISSN: 0084-6589
    Source: Annual Reviews Electronic Back Volume Collection 1932-2001ff
    Topics: Biology , Physics
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Science Ltd
    Journal of oral rehabilitation 27 (2000), S. 0 
    ISSN: 1365-2842
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: To reveal the acoustic characteristics associated with hypernasality and to ascertain their correlation to the severity of hypernasality, 30 speech samples produced by 15 maxillectomy patients were acoustically analysed with and without an obturator prosthesis in place. The isolated, sustained Japanese vowel /i/ was used as the stimulus for acoustic measurement and perceptual judgment to evaluate the severity of hypernasality. Normalized 1/3-octave spectral analysis demonstrated the spectral characteristics of hypernasality as a rise in amplitude between the first and second formants around the 1 kHz region, and a reduction in amplitude of the frequencies higher than the second formant. High correlation was shown between the perceptual ratings and the predicted values derived from stepwise regression analysis.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Biophysical Chemistry 30 (1988), S. 69-79 
    ISSN: 0301-4622
    Keywords: Bacteriorhodopsin ; Denaturation ; Hydrogen bond ; Hydrophobic interaction ; Membrane protein ; Tertiary structure
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Biophysical Chemistry 21 (1985), S. 277-284 
    ISSN: 0301-4622
    Keywords: Ca^2^+ ; Dipalmitoylphosphatidylcholine ; Fluorescence anisotropy
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Biophysical Chemistry 21 (1985), S. 265-275 
    ISSN: 0301-4622
    Keywords: Ca^2^+ ; Dipalmitoylphosphatidylcholine ; Transition anomaly ; Ultrasonic properties
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Biophysical Chemistry 40 (1991), S. 217-222 
    ISSN: 0301-4622
    Keywords: Bovine carbonic anhydrase B ; Hydrophobic core ; Hydrophobic fluorescence probe ; Molten-globule state
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    Springer
    Journal of materials science 15 (1996), S. 174-175 
    ISSN: 1573-4811
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
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