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  • 2005-2009  (16)
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Material
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Year
  • 1
    Electronic Resource
    Electronic Resource
    Fine ELID Grinding on the Symmetric Paraboloidal Mirror of Quartz (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 339 (May 2007), p. 11-15 
    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: Quartz has excellent optical properties and thus it is often used as the material of mirrorand lens. However, it is almost impossible to be machined by cutting due to its brittle and highhardness. Grinding is a common method for machining quartz. One of the authors designed a newtype of a paraboloidal mirror of quartz for the neutron optical devices. The fabrication process ofthis mirror was investigated in this experiment. A jig with two grooves of 90 degrees was made andtwo workpieces were stuck on the jig using the wax melt at about 60 degrees centigrade. The twoworkpieces were first ground applying ELID (electrolytic in-process dressing) grinding methodwith #325 and #1200 cast iron bonding diamond abrasive wheels. Then the ground surface waspolished with CeO2 slurry. The finished surface roughness was Ra2.0nm and rms2.4nm and its formerror about 2μm. After coating process, its properties of focusing neutron beam were measured. Theresults were that the reflecting rate was 42%, gain 1.9 and 2.3mm×10.1mm beam focused to1.6mm×2.1mm
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/53/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.339.11.pdf
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  • 2
    Electronic Resource
    Electronic Resource
    Characteristics of Free Form Finishing Applying V-CAM System (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 329 (Jan. 2007), p. 273-278 
    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 new CAD system, which is called Volume-CAD (VCAD) have been developed. Wecarried out research and development of VCAD fabrication process based on VCAD/CAM precisioncontrol. In this study, a developed V-CAM had been used for a polishing fundamental experiment of afree form surface. The relationship between NC resolution and form accuracy of polished surface arediscussed
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/52/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.329.273.pdf
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Structure and Mechanical Properties of Submicrocrystalline Copper Produced by ECAP to Very High Strains (2006)
    s.l. ; Stafa-Zurich, Switzerland
    Materials science forum Vol. 503-504 (Jan. 2006), p. 971-976 
    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: The present work is aimed at linking the microstuctutral features obtained after severe plastic deformation via ECAP to the tensile behavior and thermal stability of pure (99.98%) copper processed by routes A and Bc to different number of passes. The main conclusion one can draw unambiguously from the currently available results is that the strain path exerts relatively little effect on the resultant tensile properties when the number of pressing is sufficiently large, although there have been some marked differences in crystallographic textures and distribution of grain-boundaries. The effect of the number of pressings on the tensile ductility is considerable
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/02/11/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.503-504.971.pdf
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  • 4
    Electronic Resource
    Electronic Resource
    Hardening Mechanisms of Metals and Alloys Produced by SPD (2006)
    s.l. ; Stafa-Zurich, Switzerland
    Materials science forum Vol. 503-504 (Jan. 2006), p. 967-970 
    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: Strengthening is a complex process involving such basic mechanisms as dislocation accumulation (work hardening), Hall-Petch hardening due to grain refinement, solid solution hardening and precipitation hardening in various combinations. The contribution of different mechanisms into resultant strength can vary significantly depending on chemical composition and processing. The purpose of the present work is to explore the significance of SPD for hardening and to clarify the role of different strengthening mechanisms. The model Au-based system was employed using pure Au, single phase solid solution Au-25Ag and precipitation hardenable Au-12.5Ag-12.5Cu (in mass %) alloy subjected to ECAP. The additive character of different strengthening mechanisms is clearly demonstrated. The extremely high strength exceeding 1 GPa is achieved in the Au-Ag-Cu after ECAP followed by aging, which has never been attained in conventional processing schemes
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/02/11/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.503-504.967.pdf
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  • 5
    Electronic Resource
    Electronic Resource
    Limiting Partition Coefficient in Progressive Freeze-concentration (2005)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of food science 70 (2005), S. 0 
    Details
    ISSN: 1750-3841
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Process Engineering, Biotechnology, Nutrition Technology
    Notes: : In the progressive freeze-concentration, limiting partition coefficient, K0, is a very important process parameter, which corresponds to the partition coefficient of a solute between the ice and liquid phase assuming the infinitesimal ice growth rate and/or the infinite mass-transfer rate at the ice-liquid interface. K0 was determined for glucose and various electrolytes in the single-component and multi-component systems. K0 was dependent both on the concentration and the type of solute. In the single-component system, osmotic pressure was proved to be the major determinant of K0. In the multi-component system, K0 for a solute was affected by the coexisting solute through the osmotic pressure of the total system. K0 was also dependent on viscosity when the change in the osmotic pressure was limited but the change in the viscosity was considerable because of the coexisting solute.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2621.2005.tb08317.x
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  • 6
    Electronic Resource
    Electronic Resource
    Discovery of an ancient lineage of Cyprinus carpio from Lake Biwa, central Japan, based on mtDNA sequence data, with reference to possible multiple origins of koi (2005)
    Oxford, UK; Malden, USA : Blackwell Science Ltd
    Journal of fish biology 66 (2005), S. 0 
    Details
    ISSN: 1095-8649
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: MtDNA sequence data (c. 2100 bp of complete D-loop + cytochrome b gene regions) showed a principal phylogenetic split within common carp Cyprinus carpio between the Lake Biwa wild form (n = 3) and ‘Eurasian’ wild (n = 18) and domesticated (n = 35) forms. This supports the idea of the ancient origin of the Lake Biwa wild form, as well as the East Asian origin of wild common carp, previously proposed on the basis of fossil data. In addition, a possible multiple origin of koi carp was indicated by the polyphyletic distribution of five mtDNA haplotypes of koi carp within the ‘Eurasian’ clade.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.0022-1112.2005.00676.x
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  • 7
    Electronic Resource
    Electronic Resource
    DNA fingerprinting of apple (Malus spp.) rootstocks using Simple Sequence Repeats (2005)
    Oxford, UK : Blackwell Publishing Ltd
    Plant breeding 124 (2005), S. 0 
    Details
    ISSN: 1439-0523
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Identification of apple clonal rootstocks based on visual morphological characteristics is often difficult because of the genetic similarity of many rootstocks and the restriction of observable characteristics at the nursery stage. In this study, a total of 66 rootstock clones representing a sub-sample of a collection of apple rootstocks from different countries maintained at NIFTS, Morioka, Japan, was screened with seven simple sequence repeat (SSR) markers to establish genetic identities, estimate genetic diversity, verify parentage and examine genetic relationships. All seven SSR loci produced one or two amplified fragments and made it possible to differentiate among the rootstocks, except between virus-free subclones and their original parents as well as between ‘Aotea 40’ and ‘Aotea 106’. The parentage of all but one rootstock clone was confirmed. The placement of individual rootstock clones into subgroups in a phenogram generated from un-weighted pair group average cluster analysis was generally based on parentage or genetic origin. Based upon the ability of the SSR data to differentiate these apple rootstocks and the high level of gene diversity, it is proposed that all commercial apple rootstocks be fingerprinted to provide a mechanism to verify the identity of individual clones.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1439-0523.2004.01064.x
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  • 8
    Electronic Resource
    Electronic Resource
    Hepatitis C Virus Infection is Highly Correlated with Hepatocellular Apoptosis and Transforming Growth Factor-β1 MRNA Expression in Patients with Chronic Hepatitis C (2005)
    Oxford, UK; Malden, USA : Blackwell Science Inc
    Wound repair and regeneration 13 (2005), S. 0 
    Details
    ISSN: 1524-475X
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: To determine whether hepatocellular apoptosis is involved in chronic liver injury in patients with chronic hepatitis C, the correlations among the rate of hepatocellular apoptosis, the rate of hepatocytes infected with hepatitis C virus (HCV) and TGF-β1 mRNA expression, were histologically examined. HCV was visualized by in situ PCR technique. Apoptotic hepatocytes were determined by TUNEL technique. TGF-β1 mRNA expression was quantified by Northern blotting analysis, and visualized by in situ hybridization. Fas-antigen and proliferating cell nuclear antigen (PCNA) on hepatocytes, and α-smooth muscle actin (αSMA) and desmin were evaluated by immunohistochemistry. In the areas of inflammation, TUNEL-positive apoptotic hepatocytes and PCNA-positive hepatocytes were occasionally observed around HCV-positive hepatocyte. TGF-β1 mRNA-positive myofibroblast-like Ito cells (double-positive for αSMA and desmin) were also observed near the HCV-positive hepatocytes. Fas-antigen was detected on the surface of most hepatocytes in all lobules. A high correlation was found between the rate of HCV positive hepatocytes and that of apoptotic hepatocytes (r = 0.81, P 〈 0.05). The increase in number of HCV-positive hepatocytes was linked to the increases in TGF-β1 mRNA level (r = 0.79, P 〈 0.05) and number of TGF-β1 mRNA-positive Ito cells (r = 0.74, P 〈 0.05). These findings confirmed that the increase in HCV-infected hepatocytes is related to the increase of hepatocellular apoptosis and the increase of TGF-β1 mRNA in the liver of hepatitis C patients. TGF-β1 plays an important role in apoptosis of hepatocytes infected with HCV.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1067-1927.2005.130117r.x
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  • 9
    Electronic Resource
    Electronic Resource
    Functional changes induced by chronic UVA irradiation to cultured human dermal fibroblasts (2005)
    Oxford, UK : Blackwell Publishing Ltd
    British journal of dermatology 153 (2005), S. 0 
    Details
    ISSN: 1365-2133
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Ultraviolet (UV) irradiation induces damage of the skin, and in particular, photoageing is known to be the result of chronic UV irradiation. Many investigations have attempted to clarify the mechanisms of photoageing induced by chronic UVA irradiation, but consensus has not been achieved yet by in vivo experiments, mostly due to differences among UV sources and animals used for experiments. In vitro experiments have shown that a single exposure to UVA irradiation causes overexpression of matrix metalloproteinases and denaturation of collagen, but the mechanisms of the photoageing effects of chronic UVA irradiation are still unclear. To examine the effects of chronic UVA irradiation, we used an in vitro fibroblast cellular ageing system as a model of photoageing. Chronic UVA irradiation of normal human fibroblasts induced shortening of the cellular life span and an increase of cellular diameter, in parallel with expression of senescence-associated β-galactosidase. Extracellular degradation enzyme, matrix metalloproteinase 1 (MMP-1) was overexpressed after repeated UVA irradiation, but tissue inhibitor of metalloproteinase 1 (TIMP-1) expression was hardly changed by chronic UVA irradiation. We conclude that chronic UVA irradiation of normal human fibroblasts induces cellular functional changes, leading to accelerated cellular ageing and MMP-1 overexpression.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2133.2005.06964.x
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  • 10
    Electronic Resource
    Electronic Resource
    A Korean case of oculocutaneous albinism type IV caused by a D157N mutation in the MATP gene (2005)
    Oxford, UK : Blackwell Science Ltd
    British journal of dermatology 152 (2005), S. 0 
    Details
    ISSN: 1365-2133
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2133.2005.06403.x
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