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  • 1
    Electronic Resource
    Electronic Resource
    Ultra-Thin Film of Chitosan and Sulfated Chitosan Coating on Titanium Oxide by Layer-by-Layer Self-Assembly Method (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 330-332 (Feb. 2007), p. 645-648 
    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: The ultra-thin film composed of chitosan (CS) and sulfated chitosan (SCS) wasassembled on the titanium oxide surface by layer-by-layer (LBL) self-assembly methods. Thetitanium oxide film was treated by NaOH solution, followed by successively dipping the substratesin 5mg/ml sulfated chitosan (SCS) and 5mg/ml chitosan (CS) solutions alternatively, Wehypothesized that this biologic coating may have the property of good biocompatibility,antibacteriostatic effect, anticoagulant activitves and enhancing sell biocompatibility
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/52/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.330-332.645.pdf
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  • 2
    Electronic Resource
    Electronic Resource
    Adsoption CD34 Antibody onto the Col/Hep Coating Film on Titanium to Improve Cytocompatibility of Titanium (2008)
    s.l. ; Stafa-Zurich, Switzerland
    Advanced materials research Vol. 47-50 (June 2008), p. 1411-1414 
    Details
    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: This study deals with improving the cytocompatibility of titanium by a coating withheparin(hep), collagen(col) and CD34 antibody. Collagen and heparin molecules were adsorbedonto a titanium surface using a layer-by-layer (LBL) self-assembly technique. The col/hep coatingwere formed by alternating deposition of negatively charged heparin and positively chargedcollagen based on electrostatic interactions. Finally the CD34 antibody was absorbed onto thesurface of col/hep coating by electrostatic interactions. The chemical composition and surfacetopography were investigated by Fourier transform infrared spectroscopy (FTIR) and scanningelectron microscopy (SEM). The fluorescence microscopy images proved that the CD34 antibodywas existed on the surface of the col/hep coating. The SEM results and the MTT test results showedthat, compared to the surface of col/hep coating and the surface of titanium, the CD34 surface hadbetter endothelial progenitor cells (EPCs) attachment and proliferation. The EPCs on the CD34surface displayed the morphology of flat endothelium, and a confluent cell layer after cultured for2d. This study suggested that this method maybe have good potential for surface modification ofcardiovascular devices
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/41/transtech_doi~10.4028%252Fwww.scientific.net%252FAMR.47-50.1411.pdf
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  • 3
    Electronic Resource
    Electronic Resource
    Biomimetic Synthesis of the Nanocomposite of Phosphorylatd Chitosan and Hydroxyapatite and its Bioactivity In Vitro (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 330-332 (Feb. 2007), p. 721-724 
    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: Phosphorylated chitosan (PCS) was used as the template to controlhydroxyapatite(HAp) growth, a novel nanocomposite composed of PCS and HAp wassynthesized by biomimetic method. Calcium phosphate (Ca 2+= 60mM, Ca/P = 1.67) solution inHCl was added dropwise into PCS solution in NaOH. The precipitate was lyophilized to obtainthe composite. The biocompatibility of the PCS-HAp nanocomopite was evaluated by osteoblastculture in vitro. The results showed that low crystallized HAp nanocrystals was formed on thePCS fibers and its crystallographic c-axis were aligned preferentially parallel to the long axisdirection of PCS; the composite have good biocompatibility in vitro. It is expected that the novelcomposite to be a potential material for bone repair
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/53/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.330-332.721.pdf
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  • 4
    Electronic Resource
    Electronic Resource
    Biomimetic Synthesis of PEC-HA Composite Analogous to Bone (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 336-338 (Apr. 2007), p. 1699-1702 
    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: A polyelectrolyte complex (PEC) composed of chitosan (CS) and phosphorylated chitosan(PCS) was used to encapsulate a calcium phosphate by a biomimetic method. An acidic CS (polycation)solution containing calcium and phosphate ions (Ca2+: 6mM, Ca/P = 1.67) was added into PCS(polyanion) solution leading to the formation of a polyelectrolyte complex (PEC) with nanoscopiccarbonate-containing, low-crystallinity hydroxyapatite (HA) distributed evenly in the fibrils of the PECby controlled crystal growth. The resulting composite material, PEC-HA, has a complicated, hierarchicalporous structure that is expected to have high bio-compatibity and that may be of use as a carrier forcontrolled-release therapetic agents
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/53/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.336-338.1699.pdf
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  • 5
    Electronic Resource
    Electronic Resource
    A Study on Erosion Mechanisms of Quartz Crystals Polished by Micro Abrasive Waterjet (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Advanced materials research Vol. 24-25 (Sept. 2007), p. 195-199 
    Details
    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: The potential of abrasive waterjet technology was investigated as a method to polishZ-blocks of synthetic quartz crystals. The polished surfaces were characterized by surfaceroughometer and scanning electron microscopy. The main factors affecting the surface roughness andthe erosion mechanisms related to material removal were analysed. It is found that abrasive mesh,water pressure and jet incidence angle are the main factors affecting the surface roughness. Bycontrast, the influence of traverse speed on the surface roughness is small. Under certain controlledconditions, the erosion mechanisms of synthetic quartz crystals are plastic flow, leaving a crack-freesurface by low-middle pressure micro abrasive waterjet
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/39/transtech_doi~10.4028%252Fwww.scientific.net%252FAMR.24-25.195.pdf
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  • 6
    Electronic Resource
    Electronic Resource
    Numerical Analysis of Electromagnetic Field of Solid Rotor Asynchronous Permanent Magnetic Coupling by Finite Element Method (2008)
    s.l. ; Stafa-Zurich, Switzerland
    Materials science forum Vol. 575-578 (Apr. 2008), p. 1376-1381 
    Details
    ISSN: 1662-9752
    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: A new-type of solid rotor asynchronous magnetic coupling which works on the principleof electromagnetic induction is researched by ourselves. This kind of asynchronous magneticcoupling can solve the problem effectively that the permanent magnets on its inner rotor isdemagnetized if its temperature is too high, because its inner rotor need not the permanent magnets.in order to study the transmission capability of the new-type magnetic coupling, its magnetic fieldshould be analyzed. Because of its magnetic field variety, it is extremely complicated and aprecision result is difficult to be got by the analytic method of the magnetic field calculation. Herethe software ANSYS FEM is used to analyze its magnetic field. And some formulas were deducedand used to calculate its torque. The experimental and calculational results indicate that this designis practicable
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/02/18/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.575-578.1376.pdf
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  • 7
    Electronic Resource
    Electronic Resource
    Effects of Information on Consumers' Willingness to Pay for GM-Corn-Fed Beef (2004)
    Lincoln, Neb. : Berkeley Electronic Press (now: De Gruyter)
    Journal of agricultural & food industrial organization 2.2004, 2, art9 
    Details
    ISSN: 1542-0485
    Source: Berkeley Electronic Press Academic Journals
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Economics
    Notes: There has been growing public opposition against genetically modified (GM) foods. Using a dichotomous choice contingent valuation methodology, we analyze the factors that affect the willingness to pay for GM-corn-fed beef by consumers in Spokane, Washington. The mean discount required to choose the GM-fed beef is small at 8% compared to other studies in Europe and Japan. Further, half the sample was provided information about biotechnology, and the effect of this information is analyzed.
    Type of Medium: Electronic Resource
    URL: http://www.bepress.com/jafio/vol2/iss2/art9
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  • 8
    Electronic Resource
    Electronic Resource
    Correlation Waveform Analysis to Discriminate Monomorphic Ventricular Tachycardia from Sinus Rhythm Using Stored Electrograms from Implantable Defibrillators (1999)
    Oxford, UK : Blackwell Publishing Ltd
    Pacing and clinical electrophysiology 22 (1999), S. 0 
    Details
    ISSN: 1540-8159
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: In order to examine whether a template-matching program utilizing correlation waveform analysis (CWA) might be used to discriminate monomorphic ventricular tachycardia (MMVT) from sinus rhythm (SR) in patients with implantable cardioverter defibrillators (ICDs), we studied stored episodes of induced MMVT in 25 patients and compared them to corresponding stored SR electrograms. We calculated mean correlation coefficients for SR beats against an SR template chosen within each sinus episode, induced MMVT beats against an induced MMVT template within each ventricular tachycardia episode, and induced MMVT beats against the original SR template. For each patient, the 99.5% lower confidence limit for the mean correlation coefficient of SR beats versus an SR template (patient-specific method) or the empirical correlation coefficient value 0.9 were selected as threshold values to discriminate induced MMVT from SR. The mean correlation coefficient for induced MMVT beats versus the original SR template for each patient was subtracted from both threshold values. A positive value is defined as accurate discrimination of induced MMVT from SR. Using 0.9 for a threshold cut off, 21 of 25 episodes of induced MMVT were accurately labeled with a sensitivity of 84%. Using the patient-specific method, we were able to correctly distinguish 23 of 25 episodes of induced MMVT from SR with a sensitivity of 92%. There was no statistically significant difference between the patient-specific or empirical methods in detecting MMVT (P 5 0.4). This is the first demonstration using stored intracardiac electrograms from ICDs that CWA is able to discriminate MMVT from SR with high sensitivity. Such a template-matching system may be used for off-line analysis or real-time rhythm discrimination.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1540-8159.1999.tb00593.x
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  • 9
    Electronic Resource
    Electronic Resource
    Orientation effects in tBN/cBN interfaces: A transmission electron microscopic study (2002)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 80 (2002), S. 46-48 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The orientation between cubic boron nitride (cBN) crystallites and the tBN layers on which they grow was studied using high-resolution transmission electron microscopy. BN films were prepared by radio-frequency magnetron sputtering under conditions leading to the formation of ∼100% cBN films grown on a preceding tBN layer. Two types of orientations were observed: (i) cBN layers grown on the edges of the tBN(0002) planes so that the cBN{111} planes are parallel to the tBN(0002) planes (as reported previously by many authors), (ii) cBN layers grown on curved tBN(0002) planes with no orientation to the tBN planes. The first type of cBN growth is associated with stress leading to delamination of cBN films thicker than 100 nm. The second type is associated with reduced stress enabling the growth of much thicker (∼500 nm) films at a relatively low (450 °C) substrate deposition temperature. These results may be helpful in the fabrication of thick cBN films and improving our understanding of the cBN nucleation process. © 2002 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1431394
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  • 10
    Electronic Resource
    Electronic Resource
    Critical thickness for transformation of epitaxially stabilized cubic AlN in superlattices (2001)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 78 (2001), S. 892-894 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The epitaxial stabilization and transformation of cubic AlN layers in AlN/VN and AlN/TiN superlattices, grown by reactive sputtering on MgO (001), is described. In AlN/VN, the critical AlN thickness lC for transformation from cubic to hexagonal increased from (approximate)3.0 to 〉4 nm when the VN superlattice layer thickness was increased from 2.0 to 6.0 nm. The effect of lattice mismatch was observed by comparing AlN/VN (mismatch=1.46%) and AlN/TiN (mismatch=3.84%). The lC values were smaller, 2–2.5 nm, for the larger mismatch AlN/TiN system. The dependence of lC on the lattice mismatch and stabilizing layer thickness is discussed based on models of epitaxial stabilization. © 2001 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1345831
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