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  • 1
    Electronic Resource
    Electronic Resource
    Effect of microstructure of titanium surface on the behaviour of osteogenic cell line MC3T3-E1 (1998)
    Springer
    Journal of materials science 9 (1998), S. 99-102 
    Details
    ISSN: 1573-4838
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine , Technology
    Notes: Abstract Three different microstructures were obtained on a titanium surface via immersion in HCl, H3PO4, or mixed acid of HNO3 and HF (HNO3/HF) solution. The microstructure and Rmax of the acid-treated surfaces were dependent on the acid type and immersion conditions. The growth rate of the osteogenic cell line MC3T3-E1 on each acid-treated sample, which was measured using MTT-formazan assay, was significantly higher than that of the standard which was ground with #400 SiC grit paper. Moreover, both the H3PO4 treated sample and the HNO3/HF-treated surface showed a tendency to enhance the alkaline phosphatase activity of MC3T3-E1 cells, which were grown on each acid-treated surface. These results suggest that the acid treatment of titanium is effective for the improvement of its osteocompatibility. © 1998 Chapman & Hall
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1008851115846
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  • 2
    Electronic Resource
    Electronic Resource
    Reactivity of silanol groups on zeolite surfaces (1998)
    Springer
    Colloid & polymer science 276 (1998), S. 992-998 
    Details
    ISSN: 1435-1536
    Keywords: Key words Modification ; faujasite ; surface silanol groups ; hydroxy nests ; alkyl group introduction
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract  Alkyl group introduction into zeolite surfaces was attempted utilizing the reactivity of surface silanol groups as lattice defects resulting from hydrothermal or acid treatment of zeolites. The reaction was carried out using organosilane and alcohols, and traced by in situ IR measurement as well as by elemental analysis. In situ IR measurement demonstrated high reactivity of terminal silanol groups. A good correlation was noted between the amount of reacted groups and the amount of terminal silanol groups, indicating high reactivity of terminal silanol groups and very low reactivity of silanol groups that form hydroxy nests. Treated zeolite exhibited high hydrophobicity, such that it floats on water.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s003960050338
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  • 3
    Electronic Resource
    Electronic Resource
    BAL Surfactant Protein A and Clara Cell 10-kDa Protein Levels in Healthy Subjects (1998)
    Springer
    Lung 176 (1998), S. 257-265 
    Details
    ISSN: 1432-1750
    Keywords: Key words: Surfactant protein A—Clara cell 10-kDa protein—Bronchoalveolar lavage—Smoking.
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract. Lung surfactant protein A (SP-A) and Clara cell 10-kDa protein (CC10) are the most abundant proteins produced locally in the lower respiratory tract, as assessed in bronchoalveolar lavage (BAL) analysis. However, it is not known what factors influence SP-A and CC10 levels in BAL fluids, and the relationship between SP-A and CC10 levels in BAL fluids has been unclear. We measured SP-A and CC10 concentrations in BAL fluids from 11 healthy nonsmokers and 12 healthy smokers by enzyme-linked immunosorbent assays using specific antibodies. Mean SP-A and CC10 levels in BAL fluids of healthy smokers were significantly lower than those of healthy nonsmokers. SP-A values correlated significantly with CC10 and phospholipid values in BAL fluids. CC10 values tended to correlate with phospholipid values in BAL fluids. On BAL examinations using three 50-ml aliquots, the mean SP-A level in the second lavage was 2.0-fold and 2.4-fold, respectively, of that in the first and third lavages, and the mean CC10 level in the first lavage was 5.0-fold and 5.6-fold, respectively, of that in the second and third lavages. We conclude that BAL fluid SP-A and CC10 levels are influenced by the BAL methods and by cigarette smoking. There is a significant positive correlation between SP-A and CC10 values in BAL fluids of healthy subjects.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/PL00007608
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  • 4
    Electronic Resource
    Electronic Resource
    Mechanism of tip-assisted migration and desorption of DNA base molecules on an SrTiO3(100)- 〈 ![IGNORE[$\sqrt{5}$]] × 〈 ![IGNORE[$\sqrt{5}$]] surface (1998)
    Springer
    Applied physics 66 (1998), S. S719 
    Details
    ISSN: 1432-0630
    Keywords: PACS: 87.64.Dz; 61.16.Ch; 81.15.Ef
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: 3 (100)- × surfaces with ultrahigh vacuum scanning tunnel ing microscopy (UHV-STM) at room temperature. Adenine molecules migrate over the surface at a negative sample bias voltage and they are desorbed from the surface at a positive sample bias. The tip-assisted migration occurred in the two different modes, which are influenced by a high-intensity electric field and the tip-molecule contact interaction. The tip-assisted desorption was induced in a high-intensity electric field. These modes were based on quantitative measurements of the absolute tip-sample distance and of the electric field between the tip and the surface.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s003390051229
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