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  • 2005-2009  (7)
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Material
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Year
  • 1
    Electronic Resource
    Electronic Resource
    Fabrication and Microanalysis of Nano-Structured CuO〈sub〉X〈/sub〉-CeO〈sub〉2〈/sub〉 Catalysts for CO Oxidation Reaction (2006)
    s.l. ; Stafa-Zurich, Switzerland
    Advanced materials research Vol. 15-17 (Feb. 2006), p. 261-266 
    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: Carbon monoxide (CO) is a significant air pollutant produced in incomplete oxidation ofcarbon in combustion. From the viewpoint of environmental protection, it is important that theconcentration of CO gas is lowered in air. Catalysis is proving to be an effective route for removingthis pollutant. Therefore, a design of nano-structured catalysts with high efficiency is required. In thepresent work, we focus on a development of nano-size CuOx-CeO2 catalysts for CO oxidationreaction. To prepare nano-structured Cu loaded CeO2 catalysts, a combined method of theconventional impregnation and ammonium carbonate co-precipitation was examined. Morphology,crystal phase and surface structure of prepared catalysts were characterized using High-ResolutionTransmission Electron Microscopy (HRTEM), Scanning Electron Microscopy (SEM) and PowderX-ray Diffraction (XRD). Catalytic properties of CuOx-CeO2 for CO oxidation were investigated ingas flow reactor system under atmospheric pressure and compared with copper oxide loaded zincoxide. We expected that nano-structured CuOx-CeO2 catalysts could be used for removing COproduced in a wet reforming reaction of fuel cell applications
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/39/transtech_doi~10.4028%252Fwww.scientific.net%252FAMR.15-17.261.pdf
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  • 2
    Electronic Resource
    Electronic Resource
    Advanced High Strength Steels for Automobile Body Structures (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Materials science forum Vol. 539-543 (Mar. 2007), p. 4386-4390 
    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: There has been a big demand for increased vehicle safety and weight reduction ofauto-bodies. An extensive use of high strength steels is one of the ways to answer the requirement.Since the crashworthiness is improved by applications of higher strength steels to crashworthinessconscious structural components, various types of advanced high strength steels have been developed.The crash energy during frontal collisions is absorbed by the buckling and bending deformations ofthin wall tube structures of the crushable zone of auto-bodies. In the case of side collision, on theother hand, a limited length of crushable zone requires the components to minimize the deformationduring the collision. The lower the strength during press forming, the better the press formability isexpected. However, the higher the strength at a collision event, the better the crashworthiness can beobtained. It can, therefore, be concluded that steels with higher strain rate sensitivities are desired.Combinations of soft ferrite phase and other hard phases were found to improve the strain ratesensitivity of flow stresses. Bake hardening is also one of the ways to improve the strain ratesensitivity of flow stresses
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/02/15/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.539-543.4386.pdf
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  • 3
    Electronic Resource
    Electronic Resource
    Recrystallisation at Intercritical Annealing in Low Carbon Steels (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Materials science forum Vol. 558-559 (Oct. 2007), p. 247-252 
    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: Subgrain growth in deformed ferrite and incomplete recrystallisation during intercriticalannealing in low carbon (LC) steels was investigated by EBSD and FEGTEM/EDS. It wasconfirmed that fine dual phase (α+γ) microstructures could be obtained even without the addition ofmicroalloying elements such as Nb and Ti, if the steels were heated above Ac1 temperature beforethe completion of primary recrystallisation and then intercritically annealed. The fine microstructurewas found to be mainly due to the inhibition of primary recrystallisation, and also due to theinhibition of subgrain growth in deformed matrix by finely dispersed γ phase formed duringheating. Mn segregation at α/γ interfaces seems to indicate that the kinetics of boundary migrationin the existence of γ is controlled by the volume diffusion of substitutional alloying elements acrossthe α/γ interfaces
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/02/17/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.558-559.247.pdf
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  • 4
    Electronic Resource
    Electronic Resource
    Scanning electron microscopic observation of oil/wax/water/surfactant system (2005)
    Oxford, UK : Blackwell Science Ltd
    International journal of cosmetic science 27 (2005), S. 0 
    Details
    ISSN: 1468-2494
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: We observed the internal structure of an oil/wax/water/surfactant system using a scanning electron microscope to investigate the relationship between its hardness and state of wax crystal. The molten wax (hydrogenated jojoba oil, ceresin, polyethylene wax, carnauba wax, or microcrystalline wax) was cast in a home-made spiral mold of aluminum foil for preparing the test specimen for SEM observation. In hydrogenated jojoba oil a fine frame-like crystal structure, the so-called ‘card-house structure,’ was observed but not in other waxes. The mixture of hydrogenated jojoba oil and water showed a few small droplets deposited on the roundish wax frame-like structure. On the other hand, waxes other than hydrogenated jojoba oil did not change their internal structure when they were mixed with water. This result suggested that hydrogenated jojoba oil showed uniquely high affinity for water. In the system of oil, water, surfactant, and various kinds of waxes, their crystal structure, hardness, and the shape of dispersed water particles were remarkably changed with the combination of waxes. In the system with ceresin and carnauba wax, the hardness measured by a card-tension meter was high, and the internal crystal structure was fine and amorphous. The water particle in the ceresin and carnauba wax system had a smaller diameter than that in the system containing hydrogenated jojoba oil. The system containing hydrogenated jojoba oil showed a card house-like wax crystal structure without high hardness. It was considered that the wax crystal structure played an important role in providing hardness and in contributing to the water distribution in the oil/wax/water/surfactant system.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1467-2494.2005.00260_2.x
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  • 5
    Electronic Resource
    Electronic Resource
    Bone marrow cells differentiate into wound myofibroblasts and accelerate the healing of wounds with exposed bones when combined with an occlusive dressing (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
    Notes: Background  The usefulness of bone marrow cells in accelerating wound healing has not been evaluated despite increasing evidence that bone marrow contains mesenchymal stem cells that have multipotentiality to differentiate into various types of cells after they enter the microenvironment of a specific tissue (niche).Objectives  To determine the effects of bone marrow cells and occlusive dressings in promoting wound healing in rats.Methods  We investigated by grafting, biopsy and immunohistochemistry whether various types of cells derived from green fluorescent protein (GFP)-transgenic rats would differentiate into wound component cells when administered topically on the wounds of rats. We also investigated whether topical application of bone marrow cells with an occlusive dressing would accelerate the healing of wounds with exposed bones, as measured by planimetry.Results  GFP-labelled bone marrow cells contained multipotent stem cells that sufficiently differentiated into wound myofibroblasts presenting with α-smooth muscle actin in granulation tissue. Other types of cells, including myocytes, adipocytes, peripheral blood cells from buffy coat and dermal fibroblasts, did not express myofibroblast characteristics morphologically or immunohistochemically. Application of bone marrow cells and an occlusive dressing accelerated the repair of wounds with exposed bones, compared with an occlusive dressing only or with the topical administration of bone marrow cells plus a semidry to dry dressing.Conclusions  Our study indicates that bone marrow cells accelerate the healing of wounds at least in part through their differentiation into wound myofibroblasts. Thus, treatment of wounds with bone marrow cells and a supportive occlusive dressing is effective in promoting the formation of healthy granulation tissue and also for the preparation of an ideal wound bed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2133.2005.06402.x
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  • 6
    Electronic Resource
    Electronic Resource
    Large haematoxylin-stainable keratohyaline granules in solar keratoses: immunohistochemical comparison using anti-Ted-H-1 antibody and antiloricrin antibody (2005)
    Oxford, UK : Blackwell Science Ltd
    British journal of dermatology 153 (2005), S. 0 
    Details
    ISSN: 1365-2133
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Background  Our previous study showed that large keratohyaline granules (KHG) in molluscum contagiosum that stained with haematoxylin also reacted with anti-Ted-H-1 monoclonal antibody (mAb), but not with antifilaggrin mAb or antiloricrin polyclonal antibody (pAb). This finding indicated that the Ted-H-1 antigenic protein is a haematoxylin-stainable protein in KHG.Objectives  To clarify the identity of the major component protein of the large KHG in solar keratosis, another disorder in which large KHG are observed.Methods  An enzyme immunohistochemical study was performed using antifilaggrin mAb, anti-Ted-H-1 mAb and antiloricrin pAb. Immunofluorescent double staining and immunoelectron microscopic analyses were performed using anti-Ted-H-1 mAb and antiloricrin pAb.Results  Antifilaggrin mAb, anti-Ted-H-1 mAb and antiloricrin pAb reacted with normal KHG in nonlesional skin of solar keratosis, while only anti-Ted-H-1 mAb reacted with the large KHG in the lesions of solar keratosis. Antifilaggrin mAb did not react with large KHG. Antiloricrin pAb reacted with the cell membrane of the stratum granulosum, but not with large KHG.Conclusions  These findings suggest that the haematoxylin-stainable protein in the large KHG would be a Ted-H-1 antigen protein which was neither filaggrin nor loricrin.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2133.2005.06866.x
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  • 7
    Electronic Resource
    Electronic Resource
    Analysis of Gear Measurement Using Virtual Gear Checker (VGC) (2008)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 381-382 (June 2008), p. 577-578 
    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: Tooth flank form deviation of micrometers influences vibration and noise characteristics ofgears and therefore strict quality control of tooth flank form is demanded. However, since gearchecker is structurally-complex, it is difficult to analyze how error factors of gear checkers influencethe measurement result. In this research, Virtual Gear Checker (VGC) is proposed, which is asimulation program of gear measurement considering the mechanisms and motions of gear checkersand possible error factors. The influence of the error factors on the measurement result can be clarifiedby VGC. VGC is also able to calculate the theoretical measurement result of non-involute helicoidartifact. It is easy for VGC to measure tooth flank form repeatedly in virtual space and therefore it canassess the uncertainty of measurement with gear checker. The uncertainty of gear measurement iscalculated as an example
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/57/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.381-382.577.pdf
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