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  • 2005-2009  (2)
  • 1995-1999  (7)
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  • 1
    Electronic Resource
    Electronic Resource
    Microstructure, heat treatment, and oxidation study of porous silicon formed on moderately doped p-type silicon (1997)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 81 (1997), S. 492-496 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: A porous Si (PS) layer with a spongy microstructure on top of a dendritic microstructure was fabricated on a moderately doped p-type Si wafer using a two-step anodization process. This illustrates that in addition to substrate doping, anodization current density also has an effect on the porous Si microstructure. A preoxidation heat treatment of the spongy-type porous Si was found to change the porous structure significantly, making it more difficult to fully oxidize the layer at low temperatures. However, dendritic porous Si can better withstand the heat treatment without suffering noticeable changes in structure. X-ray photoelectron spectroscopy, infrared spectroscopy, and electrical breakdown tests were used to analyze the oxidized porous Si samples. The oxidation process and the resultant oxide were found to depend on several factors, including the porosity, the microstructure itself (e.g., spongy or dendritic-type), and the heat treatment history prior to oxidation. With similar porosity, dendritic PS is easier to oxidize compared to spongy PS. © 1997 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.364107
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Topological definition of crystal structure: determination of the bonded interactions in solid molecular chlorine (1995)
    [S.l.] : International Union of Crystallography (IUCr)
    Acta crystallographica 51 (1995), S. 143-153 
    Details
    ISSN: 1600-5724
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Notes: The heavier halide molecules form layered crystals indicative of the presence of a specific directed intermolecular interaction. It is shown that this interaction within the crystal can be defined and characterized using the topology of the electron density within the theory of atoms in crystals. It is also shown that its presence in the crystal and the resulting geometry of the layered structure can be predicted in terms of the topology of the Laplacian distribution of an isolated Cl2 molecule, as it relates to the definition of Lewis acid and base sites within the valence shell of an atom. The generality of the definition of both primary and secondary interactions in terms of the topology of the electron density is demonstrated for all types of crystal. The electron density of solid molecular chlorine was determined by fitting the experimental X-ray structure factors and by theoretical calculation and its topology determined. Each Cl atom is found to be linked by bond paths, lines of maximum electron density, to twelve other atoms in the crystal: to four atoms in the same layer parallel to the bc plane, one of which defines the intramolecular bond of the Cl2 group, to six atoms in the four neighbouring molecules lying in the same stack parallel to the b axis and to two atoms in molecules situated in a neighbouring stack.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0108767394009463
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Development of Model Cell Based on the Myocardial Cell Experiments and Simulations (2006)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 326-328 (Dec. 2006), p. 907-910 
    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: As one kind of the most important cells in human body, myocardial cell becomes the focus ofattention, not only the biologist but also the researchers of mechanics. A new viscoelasticconstitutive model of the living myocardial cell is developed based on the micropipette suctionexperiment in which the surface of the cell is aspirated into a small glass tube while tracking theleading edge of its surface. Some numerical simulations are presented by finite element to modelthe whole process of micropipette suction of the myocardial cell. Meanwhile, a model cell with bothmechanical behavior and physiological function is being developed, to prove the viscoelasticconstitutive model and to predict more results of myocardial cell under different physiologyconditions
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/52/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.326-328.907.pdf
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  • 4
    Electronic Resource
    Electronic Resource
    Finite Element Modeling of Cardiac Pacing/Defibrillation Lead Interaction with Heart (2006)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 306-308 (Mar. 2006), p. 1271-1276 
    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 hyperelastic constitutive model of cardiac muscle is developed based on the animal surgical operation and mechanical experiments from the heart of the dogs, and the relaxation phenomena is also studied based on the Hill three elements model which is viscoelastic. Some numerical simulations are presented by finite element for the cardiac pacing/defibrillation lead interaction with muscles of the heart
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/50/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.306-308.1271.pdf
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  • 5
    Electronic Resource
    Electronic Resource
    Malignant familial hypertrophic cardiomyopathy in a family with a 453Arg→Cys mutation in the β-myosin heavy chain gene: Coexistence of sudden death and end-stage heart failure (1996)
    Springer
    Human genetics 〈Berlin〉 97 (1996), S. 585-590 
    Details
    ISSN: 1432-1203
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract Recent genotype-phenotype correlation studies in familial hypertrophic cardiomyopathy (FHC) have revealed that some mutations in the β-myosin heavy chain (BMHC) gene may be associated with a high incidence of sudden death and a poor prognosis. Coexistence of sudden death and end-stage heart failure in several families with FHC has recently being reported; however, the genetic basis of such families has not been clearly demonstrated. A three-generation Chinese familial hypertrophic cardiomyopathy (FHC) family (family HL I) with two cases of end-stage heart failure and three cases of sudden death was analyzed. The average age of death in the affected members in this family was 34 years old. Genetic linkage analysis using polymorphisms in the α- and β-myosin heavy chain genes revealed that FHC in this family is significantly linked to the BMHC gene without recombinations. Single-strand conformation polymorphism analysis of exons 8, 9 and 13 to 23 in the BMHC gene showed a polymorphic band on exon 14 that is in complete linkage with the disease status in this family. DNA sequencing analysis in the affected members revealed an 453Arg→Cys mutation in the BMHC gene. To our knowledge this is the first reported mutation of FHC in Chinese. Our data suggest that the 453Arg→Cys mutation is associated with a malignant clinical course in FHC due not only to sudden death but also to end-stage heart failure.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02281865
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    Paper (German National Licenses)
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  • 6
    Electronic Resource
    Electronic Resource
    Mapping the locus for familial hypertrophic cardiomyopathy to chromosome 11 in a family with a case of apical hypertrophic cardiomyopathy of the Japanese type (1996)
    Springer
    Human genetics 〈Berlin〉 97 (1996), S. 457-461 
    Details
    ISSN: 1432-1203
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract To identify the disease locus of familial hypertrophic cardiomyopathy (FHC) in a Chinese family, a genetic linkage study was performed using polymorphisms from various chromosomal regions. This family has eight affected members, including a case with typical features of apical hypertrophic cardiomyopathy of the Japanese type. The results revealed significant evidence of linkage of polymorphisms on chromosome 11p13–q13 and FHC in this family with a maximal lod score of 3.38 at θ = 0.00. Our data suggest that the locus responsible for FHC in this family maps to chromosome 11 and that the molecular basis of FHC in the case of apical hypertrophic cardiomyopathy of the Japanese type might be similar to that of other affected members in the same family. Further studies are needed to elucidate the whole spectrum of the genetic basis of apical hypertrophic cardiomyopathy of the Japanese type.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s004390050072
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    Paper (German National Licenses)
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  • 7
    Electronic Resource
    Electronic Resource
    Malignant familial hypertrophic cardiomyopathy in a family with a 453Arg→Cys mutation in the ‚-myosin heavy chain gene: coexistence of sudden death and end-stage heart failure (1996)
    Springer
    Human genetics 〈Berlin〉 97 (1996), S. 585-590 
    Details
    ISSN: 1432-1203
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract Recent genotype-phenotype correlation studies in familial hypertrophic cardiomyopathy (FHC) have revealed that some mutations in the β-myosin heavy chain (BMHC) gene may be associated with a high incidence of sudden death and a poor prognosis. Coexistence of sudden death and end-stage heart failure in several families with FHC has recently being reported; however, the genetic basis of such families has not been clearly demonstrated. A three-generation Chinese familial hypertrophic cardiomyopathy (FHC) family (family HL1) with two cases of end-stage heart failure and three cases of sudden death was analyzed. The average age of death in the affected members in this family was 34 years old. Genetic linkage analysis using polymorphisms in the α- and β-myosin heavy chain genes revealed that FHC in this family is significantly linked to the BMHC gene without recombinations. Single-strand conformation polymorphism analysis of exons 8, 9 and 13 to 23 in the BMHC gene showed a polymorphic band on exon 14 that is in complete linkage with the disease status in this family. DNA sequencing analysis in the affected members revealed an 453Arg→Cys mutation in the BMHC gene. To our knowledge this is the first reported mutation of FHC in Chinese. Our data suggest that the 453Arg→Cys mutation is associated with a malignant clinical course in FHC due not only to sudden death but also to end-stage heart failure.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s004390050099
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    Paper (German National Licenses)
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  • 8
    Electronic Resource
    Electronic Resource
    Ceramers Based on Crosslinked Epoxy Resins-Silica Hybrids: Low Surface Energy Systems (1998)
    Springer
    Journal of sol gel science and technology 13 (1998), S. 405-408 
    Details
    ISSN: 1573-4846
    Keywords: epoxy ; fluorine ; surface energy ; ceramers ; organic-inorganic hybrids
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Ceramers based on silica and bisphenol-A epoxy resin cured with methyl nadic anhydride (MNA) and diamino diphenyl sulphone (DDS) were prepared in THF solutions. Compatibilization was induced through functionalization of the epoxy resin with amine trialkoxy silanes prior to mixing with a pre-hydrolyzed tetralkoxysilane solution (TEOS). The epoxy ceramers were further modified by the addition of small amounts of a silane functionalized alkane perfluoroether oligomer. A morphology consisting of very fine interpenetrating phases could be easily achieved through the silane functionalization of the epoxy resin. The final ceramer, however, always displayed a reduction in the glass transition temperature (Tg), resulting either from reactions of the anhydride hardener with the ethanol produced from the hydrolysis of TEOS or from the reaction of the acid catalyst with the epoxy groups. The use of the perfluoroether oligomer produced a large reduction in surface energy due to migration of the fluorinated components to the outer layers of the films.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1008613025946
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  • 9
    Electronic Resource
    Electronic Resource
    Thermal decomposition and micropore formation in PEK, PEEK and PES (1995)
    Springer
    Journal of materials science 30 (1995), S. 3853-3855 
    Details
    ISSN: 1573-4803
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract At strain rates greater than about 10 the deformation of polymers is an adiabatic process which can lead to the generation of very high localized temperatures. These may be well in excess of the temperatures required for thermal decomposition of the polymer to occur. It is speculated that gaseous products arising from such decomposition may act as the source of microcavities and craze initiators. Experiments are described in which the thermal decomposition reaction parameters of polyetherketone, polyetheretherketone, and polysulphone are measured using differential scanning calorimetry and thermogravimetric analysis, and the decomposition products analysed by mass spectrometry. The results indicate that the proposed mechanism could act as a source of micropores with total pore volumes amounting to several per cent of the material volume.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01153945
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    Paper (German National Licenses)
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