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  • 1
    Electronic Resource
    Electronic Resource
    Protein Structure Refinement Using Carbon-13 Nuclear Magnetic Resonance Spectroscopic Chemical Shifts and Quantum Chemistry (1995)
    s.l. : American Chemical Society
    Journal of the American Chemical Society 117 (1995), S. 8823-8829 
    Details
    ISSN: 1520-5126
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ja00139a016
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  • 2
    Electronic Resource
    Electronic Resource
    Metal Ion Dependence of Active-Site Structure of the Tetrahymena Ribozyme Revealed by Site-Specific Photo-crosslinking (1994)
    s.l. : American Chemical Society
    Journal of the American Chemical Society 116 (1994), S. 4178-4182 
    Details
    ISSN: 1520-5126
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ja00089a005
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  • 3
    Electronic Resource
    Electronic Resource
    Dynamics of flexible triplet biradicals (1989)
    s.l. : American Chemical Society
    Accounts of chemical research 22 (1989), S. 199-205 
    Details
    ISSN: 1520-4898
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ar00162a001
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  • 4
    Electronic Resource
    Electronic Resource
    Repairing Periodontal Bone Defect with In Vivo Tissue Engineering Bone (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 330-332 (Feb. 2007), p. 1121-1124 
    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 purpose of this study was to develop a feasible approach for repairing periodontalbone defects with the in vivo tissue engineering bone incorporated with bioabsorbable PLAmembrane and to provide evidences for the clinical application. Osteoinductive HA/β-TCP sinteredat 1100℃ were implanted in the femur medial muscles in the hind legs of three dogs. Fourweeks after implantation, the in vivo tissue engineering (TE) bone was explanted. Meanwhile,artificial periodontal bone defects of 8mm×6mm were performed on the buccal side of 4th premolarand 1st molar of mandible bilaterally, with the exposure of dental roots. The defects were treated asfollows: (1) in vivo TE bone and PLA membrane; (2) HA/β-TCP ceramics and PLA membrane; (3)PLA membrane only; (4) empty control. At the 2, 4, 8 weeks post-transplantation, the dogs weresacrificed. The specimen were harvested and evaluated by gross inspection, dental radiography,SPECT (99mTC-MDP) and histological observation by MPIA2500. The results showed that moremature osseointegration was found in the group 1. We presumed that the in vivo TE bone graftcould enhance the reparation of periodontal bone defects
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/53/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.330-332.1121.pdf
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  • 5
    Electronic Resource
    Electronic Resource
    Reconstructing Box-Like Bone Defect of Mandible with In Vivo Tissue Engineering Bone (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 330-332 (Feb. 2007), p. 1165-1168 
    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 purpose of this study was to explore the feasibility of repairing massive bone defectwith in vivo tissue engineering(TE) bone, and to provide experimental evidence for the applicationof in vivo TE bone into clinic in the future. Six calcium phosphate ceramics (Ca-P ceramics)columns were prepared, and then immersed in dynamic revised simulated body fluid (RSBF). 72hours later, the bone-like apatite was formed on the surface and pore walls of ceramics. Three dogswere used in this study. Two ceramic columns were implanted bilaterally in the femoral muscles ofeach dog to construct living bone graft of in vivo TE bone. 6 weeks after implantation, they weretransplanted to the box-like bone defects sites created in bilateral mandible of the same animals.The dogs were sacrificed at 8, 12 week after operation respectively. Samples were harvested forgross observation, X-ray examination, tetracycline fluorescence labeling, SPECT and histologicalobservation. These results demonstrated that as a living bone graft, in vivo TE bone participated inthe bone metabolism of host, and integrated with the host bone. It is feasible to reconstruct box-likebone defect of mandible with the in vivo TE bone
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/53/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.330-332.1165.pdf
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  • 6
    Electronic Resource
    Electronic Resource
    Theoretical Investigation on Horizontally Shear Waves in a Functionally Gradient Piezoelectric Material Plate (2008)
    s.l. ; Stafa-Zurich, Switzerland
    Advanced materials research Vol. 33-37 (Mar. 2008), p. 707-712 
    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: For the propagation of horizontally shear waves (SH-waves) in a functionally gradientpiezoelectric material (FGPM) plate, the governing equations are established by the theory ofelasticity. The Airy equations and Airy functions are applied to find the solutions of the equations.Numerical results indicate that: compared with those of SH-waves in a transversely isotropicpiezoelectric plate, remarkable difference can be observed for the dispersion properties of SH-wavesin a FGPM plate. Material coefficients gradient variation patterns do not affect higher modesdispersion properties of SH-waves in a FGPM plate for electrically open case. While for electricallyshorted case, dispersion properties of SH-waves higher modes are affected by the materialcoefficients gradient variation patterns, remarkable influences can be observed for S0 mode.Influences of materials coefficients gradient variation patterns on cutoff-frequencies of SH-waves arealso revealed. The results obtained are meaningful for the investigation and characterization ofSH-waves in inhomogeneous media
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/40/transtech_doi~10.4028%252Fwww.scientific.net%252FAMR.33-37.707.pdf
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  • 7
    Electronic Resource
    Electronic Resource
    Preparation of Ni-P Alloy Composite Tube-Form Carbon Membrane for Gas Separation (2006)
    s.l. ; Stafa-Zurich, Switzerland
    Advanced materials research Vol. 11-12 (Feb. 2006), p. 457-460 
    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: A novel tube-form asymmetrical carbon membrane based on phenol-formaldehyde resin(PFR) is proposed in this paper. The membrane is composed of Ni-P alloy on exterior surface ofcarbon support membrane by electroless plating method after adding ferrous powders (〈20&m) asactive particles inside the membrane procurer. The results show that the H2, N2 and CO2 permeationrate through the composite Ni-P carbon membrane decrease and gas separation factors increase withincrease of Fe content, and H2, N2 and CO2 permeation rates reach 0.44, 0.10 and 0.08m3.m-2.s-1.MPa-1, respectively; H2/N2 and H2/CO2 separation factors are 4.2 and 5.5, respectively.The morphology of the membrane is measured by Scanning Electron Microscope (SEM)
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/39/transtech_doi~10.4028%252Fwww.scientific.net%252FAMR.11-12.457.pdf
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  • 8
    Electronic Resource
    Electronic Resource
    Effect of Initial Stress on the Behavior of Love Waves in an Elastic Half-Space with a Functionally Graded Layer (2008)
    s.l. ; Stafa-Zurich, Switzerland
    Advanced materials research Vol. 33-37 (Mar. 2008), p. 669-674 
    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 propagation behavior of Love waves in a functionally graded material layeredhalf-space with initial stress is taken into account. The Wentzel-Kramers-Brillouin (WKB)asymptotic technique is adopted for the theoretical derivations. The analytical solutions are obtainedfor the dispersion relations and the distributions of mechanical displacement and stress alongthickness direction in the layered structure. Firstly, these solutions are used to study effects of theinitial stress on the dispersion relations and phase velocities, then influences of the initial stress on thedistributions of mechanical displacement and shear stresses along thickness direction are discussed indetail. Numerical results obtained indicate that the phase velocity of Love wave increases with theincrease of the magnitude of the initial tensile stress, while decreases with the increase of themagnitude of the initial compression stress. The effects on the dispersion relations of the Love wavepropagation are negligible as the magnitudes of the initial stress are less than 100MPa. Some otherresults are shown for distributions of field quantities along thickness direction. The results obtainedare not only meaningful for the design of functionally graded structures with high performance butalso effective for the evaluation of residual stress distribution in the layered structures
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/40/transtech_doi~10.4028%252Fwww.scientific.net%252FAMR.33-37.669.pdf
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  • 9
    Electronic Resource
    Electronic Resource
    Exploring the Osteoinductivity of Calcium Phosphate Ceramics/PLA or Collagen Composites (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 336-338 (Apr. 2007), p. 1638-1641 
    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 purpose of this study is to explore the osteoinductivity of the composite materials (calciumphosphate ceramics/PLA or collagen composites) with similar physical character of osteoinductivecalcium phosphate ceramics and the influence of the chemical composition of the composite materials onosteoinductivity, and also to provide an experimental evidence for optimizing the design of the compositematerials. Two kinds of composite materials were prepared. One (BCP/PLA) is fabricated with differentratio of BCP (biphasic calcium phosphate) ceramics powder and PDLLA powder through the particulateleachingtechnique. The other (BCP/collagen) is that BCP ceramics sintered at 1250oC and modified withcollagen. The porous materials cylinders with Φ 5×8 mm were prepared. SEM was used to observe themicrostructure and physical morphology of the composite materials. The two groups of compositematerials cylinders were implanted in the dorsal muscles of four dogs. Six samples of each group wereimplanted in each dog respectively. The specimens were harvested at 2, 4, 12 and 24 weeks post operation,and thin decalcified sections were prepared for light microscopy (LM) analysis to evaluate theirosteoinductivity and compare the capability of osteoinduction. The fibro-tissue and bone-like tissue wereobserved in the two composites, but no obvious bone formation was found in the tested periods. Theresults indicated that the composite materials could modify the mechanical property of ceramics.However, if the composite materials were biodegraded soon, new bone could not form into the scaffold,and the calcium phosphate should be the major component of osteoinductive materials
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/53/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.336-338.1638.pdf
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  • 10
    Electronic Resource
    Electronic Resource
    Constructing Bone Graft with Calcium Phosphate Ceramics in Different Non-Osseous Tissue (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 342-343 (July 2007), p. 641-644 
    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 study is aimed at to explore the construction of bone graft with calcium phosphateceramics implanted in subcutaneous fat, and provide applying technique for the in vivo bone tissueengineering. Forty-eight calcium phosphate ceramics (Ca-P ceramics) columns with Φ 5×8 mmwere prepared, and eight dogs were used in this experiment. Six samples were implanted in eachdog. Three in dorsal muscles while the others in subcutaneous fat. The specimens were harvested at4, 6, 12 and 24 weeks post operation, for gross observation, SPECT and histological studies. Theosseous or osteoid tissue formation at different times in the two non-osseous sites was comparedand the new bone grafts in subcutaneous fat and intramuscular implantations were evaluated. Theresults demonstrated that the bone graft could be constructed not only in muscle but also insubcutaneous fat. Compared to that in muscle, constructing bone graft in subcutaneous fat couldhave brighter prospect to clinical application
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/54/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.342-343.641.pdf
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