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  • 2005-2009  (7)
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Material
Years
Year
  • 1
    Electronic Resource
    Electronic Resource
    Cell Proliferation on Titania Layer with In Vitro Apatite Forming Ability (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 330-332 (Feb. 2007), p. 131-134 
    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: Titania layer was fabricated on the titanium substrates with chemical treatment with 20ml or 40ml ofhydrogen peroxide solution and subsequent heat treatment at 400°C, coded as CHT20 and CHT40, respectively.CHT20 spontaneously deposited apatite on the surface in a simulated body fluid (SBF), while CHT40 did not.TF-XRD patterns showed that the diffraction intensity of anatase of CHT20 was higher than that of CHT40. Itwas suggested that the thicker titania layer indicated in vitro apatite forming ability. The cell proliferation ofCHT20 and CHT40 were lower than NT and HT. Since the surface of titania layers became hydrophobic afterautoclaving, we can suppose that the cell proliferation on CHT20 and CHT40 were lower than NT and HT dueto their surface hydrophobicity
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/52/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.330-332.131.pdf
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  • 2
    Electronic Resource
    Electronic Resource
    Fabrication of TiO〈sub〉2〈/sub〉-Aerogel with NiB Nano-Clusters and Its Structural Characterization and Catalysis Evaluation (2006)
    s.l. ; Stafa-Zurich, Switzerland
    Advanced materials research Vol. 11-12 (Feb. 2006), p. 7-10 
    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: We have prepared titania aerogel (=AG) embedded by NiB nano-clusters by sol-gelmethod, immersion of the prepared wet gel into the NiB dispersed solution, and the subsequent supercritical drying (=SCD). The AG was characterized by X-ray diffraction (XRD), a transmissionelectron microscopy (TEM), and a fourier transform infrared spectrophotometer (FT-IR). XRD andselected area electron diffraction (SAED) patterns assured the formation of TiO2 anatase phase. TEMobservation reveled the composition of TiO2 crystallites with about 4 nm in size. Catalystperformance for the ground sample was confirmed by chemical reaction of oxidation of benzene atlow temperature, and the difference in catalyst performance between TiO2 AGs with and without theembedded NiB nano-clusters has been examined
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/39/transtech_doi~10.4028%252Fwww.scientific.net%252FAMR.11-12.7.pdf
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  • 3
    Electronic Resource
    Electronic Resource
    Fabrication of Carbon Aerogels (2006)
    s.l. ; Stafa-Zurich, Switzerland
    Advanced materials research Vol. 11-12 (Feb. 2006), p. 19-22 
    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: RF (Resorcinol-Formaldehyde) aerogels and carbon aerogels were prepared through thesol-gel method following the routes of polymerization, gelation, supercritical drying and pyrolysisprocesses. The influence of fabrication parameters on the textural structure of the samples, e.g.,specific surface area, pore size, and pore size distribution, etc., were systematically investigated. Witha decrease in the R/F molar ratio, or an increase in the catalyst content within a limited range, theporosity of the nanostructure materials increases. The optimal temperature of pyrolysis for RF aerogelwas investigated by TGA (Thermogravimetric Analysis)
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/39/transtech_doi~10.4028%252Fwww.scientific.net%252FAMR.11-12.19.pdf
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  • 4
    Electronic Resource
    Electronic Resource
    Addition of Surface Function to Zirconia for Biomaterial Use (2008)
    s.l. ; Stafa-Zurich, Switzerland
    Advances in science and technology Vol. 57 (Sept. 2008), p. 139-143 
    Details
    ISSN: 1662-0356
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Natural Sciences in General , Technology
    Notes: Due to the merits of zirconia ceramics such as high strength, toughness, and abrasionresistance, as well as chemical stability in vivo, yttria-stabilized tetragonal zirconia polycrystals(Y-TZP) are currently used in the femoral head of hip prostheses. However, this material has a limitedrange of use because it is a bioinert material that does not interact with bone tissue and thus does noteasily integrate directly with bone. Therefore, addition of a material surface that enables the in vivoformation of a bone-like apatite layer that exhibits bioactivity and facilitates interactions andintegration with bone tissue is desired. In addition, by developing a surface structure that enhancesmechanical bonding, this material can be expected to be used as an alternative aggregate under loadbearing conditions. In the present study, structural design of the material surface, addition ofbioactivity using reagents treatment, confirmation of formation of the apatite layer using immersion insimulated body fluid, mechanical assessment, and wettability testing were conducted with theobjective of controlling interactions between zirconia ceramics and the body
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/42/transtech_doi~10.4028%252Fwww.scientific.net%252FAST.57.139.pdf
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  • 5
    Electronic Resource
    Electronic Resource
    Preventive therapy for non-steroidal anti-inflammatory drug-induced ulcers in Japanese patients with rheumatoid arthritis: the current situation and a prospective controlled-study of the preventive effects of lansoprazole or famotidine (2005)
    Oxford, UK : Blackwell Publishing Ltd
    Alimentary pharmacology & therapeutics 21 (2005), S. 0 
    Details
    ISSN: 1365-2036
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Background : There is a lack of evidence for the efficacy of preventive medications for peptic ulcers (PUs) among long-term users of non-steroidal anti-inflammatory drugs (NSAIDs) in Japan.Aim : To estimate the preventive effect by normal dose, not high-dose histamine-H2 receptor antagonists (H2RA) for NSAID-induced ulcers.Methods : We designed two different studies to assess the efficacy of anti-ulcer agents in rheumatoid arthritis (RA) in patients treated over a long term with NSAIDs. An investigative survey divided patients into those not taking anti-ulcer agents (non-medication group); those taking mucosal protective agents (mucosal protectant group), H2RA (H2RA group), proton pump inhibitors (PPI group), or a prostaglandin E1 analog (PG) (PG group). The second study compared prospectively the preventive effects of either famotidine 20 mg bd (famotidine group) or lansoprazole 15 mg daily (lansoprazole group) in patients with PU scars.Results : The prevalence of PU in the H2RA group was significantly lower compared to the mucosal protectant group (P 〈 0.05), and the mucosal protectant group was not significantly different to the non-medication group. The prospective study revealed that the PU onset rate of the famotidine group was 8% (1/13), and lansoprazole group was 15% (2/13), indicating no significant differences between the two.Conclusions : In Japan, normal-dose H2RA is expected to be a new PU preventive treatment strategy in patients requiring long-term NSAID therapy.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2036.2005.02477.x
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  • 6
    Electronic Resource
    Electronic Resource
    Validity of 13C-phenylalanine breath test to evaluate functional capacity of hepatocyte in patients with liver cirrhosis and acute hepatitis (2005)
    Oxford, UK : Blackwell Science Ltd
    Alimentary pharmacology & therapeutics 21 (2005), S. 0 
    Details
    ISSN: 1365-2036
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Background : No definitive method for quantitative evaluation of hepatic function has as yet been established.Aim : To investigate whether the 13C-phenylalanine breath test would be useful for the evaluation of hepatic function in patients with liver cirrhosis and acute hepatitis.Methods : l-[1-13C]-phenylalanine was administered orally in a dose of 100 mg to 25 patients with liver cirrhosis, 22 patients with acute hepatitis and 10 healthy subjects. The relationships of the cumulative excretion with the 13C-%dose/h, blood biochemical parameters and asialoscintigraphy were investigated.Results : In liver cirrhosis patients, the cumulative excretion showed correlations with hepatic function tests, asialoscintigraphy, clinical stage and portal hypertension. In acute hepatitis patients, the cumulative excretion showed correlations with hepatic function tests. There were positive correlations between the cumulative excretion and the 13C-%dose/h at 20 min (Phe20) and 13C-%dose/h at 30 min (Phe30) in liver cirrhosis and acute hepatitis patients. Multiple regression analysis demonstrated that total bilirubin, total cholesterol and absence of varices were independent determinants of cumulative excretion in liver cirrhosis patients and prothrombin time in acute hepatitis patients.Conclusion : The 13C-phenylalanine breath test may allow hepatic function to be evaluated non-invasively in liver cirrhosis and acute hepatitis patients, and the Phe20 and Phe30 may be useful for determination of function at a single time-point.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2036.2005.02409.x
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  • 7
    Electronic Resource
    Electronic Resource
    Evidence for Involvement of p59fyn in Fasting-Induced Thymic Involution (2005)
    Oxford, UK; Malden, USA : Blackwell Science Ltd
    Scandinavian journal of immunology 62 (2005), S. 0 
    Details
    ISSN: 1365-3083
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: p59fyn, a member of the src-family protein tyrosine kinase, is expressed abundantly in thymus. We examined the possible involvement of p59fyn in thymic involution induced by a fasting stress in Fyn–/– mice. An acute 48 h fast resulted in severe atrophy of the thymus and a marked decrease of the total thymocyte number with depletion of the CD4+CD8+[double positive (DP)] population in Fyn+/+ (control) mice. A remarkable increase in terminal deoxynucleotidyl transferase-mediated dUTP-biotin nick end labelling-positive signals was detected in the fasted group of control mice. However, these findings were not observed in Fyn–/– mice. Interestingly, MRL/MPJ-lpr/lpr, a Fas-deficient model animal, also showed no significant decrease of DP cell numbers in the fasted group. p59fyn is known to interact with Fas signalling, and these findings suggest that p59fyn is involved in fasting-induced thymic involution, raising the possibility that Fas/p59fyn-mediated signalling may, at least partially, be associated with the phenomenon.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-3083.2005.01646.x
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