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  • 1
    Electronic Resource
    Electronic Resource
    Structural Studies of Ribonuclease. XXIII. Pairing of the Tyrosyl and Carboxyl Groups* (1966)
    s.l. : American Chemical Society
    Biochemistry 5 (1966), S. 2043-2048 
    Details
    ISSN: 1520-4995
    Source: ACS Legacy Archives
    Topics: Biology , Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/bi00870a036
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  • 2
    Electronic Resource
    Electronic Resource
    Velocity shear instabilities in the multicomponent plasma sheet region (2000)
    [S.l.] : American Institute of Physics (AIP)
    Physics of Plasmas 7 (2000), S. 1014-1019 
    Details
    ISSN: 1089-7674
    Source: AIP Digital Archive
    Topics: Physics
    Notes: In the presence of ionospheric O+ ions, the velocity shear instability of ultralow frequency surface wave in the plasma sheet is investigated. By considering protons and O+ ions flow in the same macrospeed and keeping the velocity curl term in the magnetohydrodynamic equations, the general dispersion relation of surface wave perturbation was obtained. It is found that the velocity shear instability tends to happen in a range of wavelengths around a certain point, which was called the resonant point. At the resonant point, even in absence of velocity shear, the damping eigen-oscillations, which are caused by the dissipation, as well as the inhomogeneities of magnetic field and plasma density, coupled with the disturbed Alfvén wave and fed the energy into the disturbed wave through Alfvén resonance. The velocity shear makes the range of unstable wavelengths enlarge around the resonant point and even enhanced the coupling at the short wavelength side of the resonant point. The presence of ionospheric O+ ions could obviously enhance the coupling. These results may be helpful in understanding magnetic pulsation (Pc5) and vertical plasma cooling in the plasma sheet, as well as substorm processes. © 2000 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.873901
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  • 3
    Electronic Resource
    Electronic Resource
    Effect of dust charge fluctuations on Kelvin–Helmholtz instability in a cold dust plasma (2000)
    [S.l.] : American Institute of Physics (AIP)
    Physics of Plasmas 7 (2000), S. 424-427 
    Details
    ISSN: 1089-7674
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Effect of dust charge fluctuations on Kelvin–Helmholtz (K–H) instability driven by sheared dust flow with both perpendicular and parallel components to magnetic field is investigated in magnetized three-component cold dust plasma. It is found that K–H instabilities are mainly driven by the parallel component of the sheared dust flow. The perpendicular component of the sheared dust flow influences the extent of the oblique propagation of the unstable perturbed wave with respect to the ambient magnetic field. For a dense dust plasma, as the perturbed frequency is much higher than the dust charging frequency, the maximum damping rate of the perturbed wave due to dust charge fluctuations will reach the order of the dust charging frequency. In this case, the critical shear for the parallel K–H instability increases rapidly because of the charging processes in the long-wavelength perturbation. © 2000 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.873811
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  • 4
    Electronic Resource
    Electronic Resource
    Diminished Heparin Binding of a Basic Fibroblast Growth Factor Mutant Is Associated with Reduced Receptor Binding, Mitogenesis, Plasminogen Activator Induction, and in vitro Angiogenesis (1994)
    s.l. : American Chemical Society
    Biochemistry 33 (1994), S. 10999-11007 
    Details
    ISSN: 1520-4995
    Source: ACS Legacy Archives
    Topics: Biology , Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/bi00202a020
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  • 5
    Electronic Resource
    Electronic Resource
    Engineering of Fibroblast Growth Factor: Alteration of Receptor Binding Specificity (1995)
    s.l. : American Chemical Society
    Biochemistry 34 (1995), S. 731-736 
    Details
    ISSN: 1520-4995
    Source: ACS Legacy Archives
    Topics: Biology , Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/bi00003a004
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  • 6
    Electronic Resource
    Electronic Resource
    Circular dichroism of .beta.-poly-L-lysine (1969)
    s.l. : American Chemical Society
    Journal of the American Chemical Society 91 (1969), S. 220-222 
    Details
    ISSN: 1520-5126
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ja01029a058
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  • 7
    Electronic Resource
    Electronic Resource
    Molecular analysis of the cytolytic protein ClyA (SheA) from Escherichia coli (1999)
    Oxford BSL : Blackwell Science Ltd
    Molecular microbiology 32 (1999), S. 0 
    Details
    ISSN: 1365-2958
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology , Medicine
    Notes: Escherichia coli K-12 carries a gene for a protein denoted ClyA or SheA that can mediate a cytolytic phenotype. The ClyA protein is not expressed at detectable levels in most strains of E. coli, but overproduction suitable for purification was accomplished by cloning the structural gene in an hns mutant strain. Highly purified ClyA protein was cytotoxic to macrophage cells in culture and caused detachment and lysis of the mammalian cells. Results from osmotic protection assays were consistent with the suggestion that the protein formed pores with a diameter of up to 3 nm. Using Acholeplasma laidlawii cells and multilamellar liposomes, we studied the effect of ClyA on membranes with varying compositions and in the presence of different ions. ClyA induced cytolytic release of the fluorescent tracer from carboxyfluorescein-loaded liposomes, and the release was stimulated if cholesterol was present in the membranes whereas addition of calcium had no effect. Pretreatment of the ClyA protein with cholesterol inhibited the pore formation, suggesting that ClyA could bind to cholesterol. Efficient coprecipitation of ClyA with either cholesterol or 1,2,3-trioctadecanoylglycerol in aqueous solutions showed that ClyA directly interacted with the hydrophobic molecular aggregates. We tested the possible functional importance of selected ClyA protein regions by site-directed mutagenesis. Defined mutants of ClyA were obtained with alterations in postulated transmembrane structures in the central part and in a postulated membrane-targeting domain in the C-terminal part. Our results were consistent with the suggestion that particular amphiphilic segments are required for ClyA activity. We propose that these domains are necessary for ClyA to form pores.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1046/j.1365-2958.1999.01435.x
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  • 8
    Electronic Resource
    Electronic Resource
    Superficial Optimization of Microcapsule (2008)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 373-374 (Mar. 2008), p. 690-693 
    Details
    ISSN: 1013-9826
    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: To solve the gelatin gum arabic electronic ink microcapsules’ problems of thin shells,easy to break and poor mechanical properties, the above microcapsule was coated byurea-formaldehyde polymer and double shell microcapsule was got. The surface morphology ofdouble shell microcapsules was observed by Metallurgical Microscopy, the dispersion particle sizeof microcapsules was measured by Laser Particle Size Analyzer, the microcapsules’ hermetizationproperty was tested by UV-Vis spectrophotometer, and the mechanical intensity of microcapsulewas measured by Microcomputer Control Omnipotence Test Machine (MCOTM). It was found thatthe microcapsule prepared by this method showed regular shape and increased size. Additionally,both the hermetization property and mechanic intensity of the microcapsules were improved
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/57/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.373-374.690.pdf
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  • 9
    Electronic Resource
    Electronic Resource
    Preparation and Characterization of Silver Citrate Nano-Emulsion and Nano-Silver Film (2008)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 373-374 (Mar. 2008), p. 698-701 
    Details
    ISSN: 1013-9826
    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: To prepare the nano-scale silver carboxylate emulsions and investigate their applicationsin the preparation of nano-scale silver films, the silver citrate emulsion was synthesized through thereaction of silver nitrate with sodium citrate in the presence of polyvinylpyrrolidone (PVP) as asurface modification agent in water. The emulsion was coated onto the surface of the PET substrateto form a thin latex layer of silver citrate. And this was followed by drying at about 100 °C. Then,the silver citrate thin film was deoxidized by aqueous ascorbic acid. Finally, a translucent silver thinfilm was formed on the surface of the PET substrate. Properties of the silver citrate emulsion andthe silver film on the PET were characterized by X-ray powder diffraction (XRD), Fouriertransform infrared spectroscopy (FTIR), laser particle size analysis, scanning electron microscopy(SEM), thermogravimetry(TG) ,UV-visible absorption spectroscopy, atomic force microscopy(AFM)and digital multimeter analysis. It was found that the silver citrate particle surface-modified by PVPhas a nano-rod structure and homogeneous size distribution. The nano-rod was about 20 nm indiameter and 200 nm in length. For the UV-visible absorption spectrum of the thin film exhibited anabsorption peak at 430 nm, the silver thin film prepared on the surface of the PET substrate was atypical nano-scale sliver film. Measurements of the sliver thin film at room temperature indicatedthat the silver film was electrically conductive, and the surface resistance was 2.42 k5/cm
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/57/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.373-374.698.pdf
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  • 10
    Electronic Resource
    Electronic Resource
    The Research and Application of Honing Technology (2001)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 202-203 (June 2001), p. 385-388 
    Details
    ISSN: 1013-9826
    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
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/45/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.202-203.385.pdf
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