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  • 2005-2009  (4)
  • 1
    Electronic Resource
    Electronic Resource
    s.l. ; Stafa-Zurich, Switzerland
    Materials science forum Vol. 561-565 (Oct. 2007), p. 1729-1732 
    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 formation process of intermetallic compound under Ni+ion implantation into pure Alwas studied at lower temperature below room temperature. Ion implantation was carried out using250KeV ion accelerator. Cascade damage was introduced Ni+ions implantation at 223K withoutnew phase nucleation. However, when Ni+ions were implanted at room temperature, the grownlarger plate-like phases were observed during implantation up to 1x1017 Ni+/cm2. Ni concentrationin Al matrix and newly formed phase were 0.3-0.5 and 8.5-13.3at%,respectively. It was identifiedthat the formed phases were close to the ordered orthorhombic structure of Al3Ni type. It was alsoconfirmed from observation with high resolution HVEM that these phases grew with continuous ionimplantation. Thus it was clarified that cascades act as preferential nucleation site for intermetalliccompound, and the phases nucleated at cascades coalesce in the growth process of each phaseduring continuous implantation through ion irradiation enhanced diffusion
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    s.l. ; Stafa-Zurich, Switzerland
    Materials science forum Vol. 561-565 (Oct. 2007), p. 2021-2024 
    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: An atomistic study of radiation-induced amorphization in the NiTi intermetalliccompound was performed by using in-situ high-resolution high-voltage electron microscopy andmolecular dynamics in conjunction with image simulations. Both theoretical and experimentalresults show that metastable nanometer-size inherent atomic clusters form and disappear duringirradiation, so that a spatiotemporal fluctuation under amorphization is induced. The randomformation and annihilation of such inherent nanoclusters are believed to be responsible for thesefluctuations, which appear to be related to transitions between the ideal glass state and metastable,unrelaxed states in an energy-dissipative system under irradiation
    Type of Medium: Electronic Resource
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  • 3
    ISSN: 1365-2303
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Objective:  Early cervical adenocarcinoma (ECA) with a tumour depth of 〈3 mm has a good prognosis. To clarify the cytological features of ECAs with depth 〈3 mm, these were compared with those of ECA with 3–5 mm and invasive adenocarcinoma (IA) invading the cervical wall with more than 5 mm in depth.Methods:  The cervical cytological features of ECAs with depth 〈3 mm (14 cases) were compared with those of ECA with 3–5 mm (four cases) and IA (13 cases). Cytologically, the presence or absence of tumour diathesis, number of atypical cells, crowded cell groups, groups with glandular structures, feathering, groups with palisading borders, rosettes, clusters, cell shape and size, nuclear shape and size, nucleolar shape and size, chromatin distribution, border and character of cytoplasm, and single cell pattern were evaluated.Results:  A tumour diathesis was seen in five of 14 ECA 〈3 mm in depth (36%), all four ECA with 3–5 mm (100%) and 11 of 13 IA with more than 5 mm (85%). Single cells, macronucleoli and coarsely granular chromatin pattern were less frequent in ECA of 〈3 mm than that in ECA with 3–5 mm and IA. The number of atypical cells and glandular structures in ECA was significantly less than that in IA. Cell crowding, feathering, palisading and rosettes were common in both ECA and IA.Conclusion:  The characteristic cytological features of ECA with depth 〈3 mm, having a good prognosis, were clean background, fewer single cells and macronucleoli, and less frequent coarsely granular chromatin pattern compared with those in ECA with 3–5 mm and IA. The number of atypical cells and glandular structures in ECA was significantly less than that in IA. Familiarity with the cytological features of ECA and its mimics is essential.
    Type of Medium: Electronic Resource
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  • 4
    ISSN: 1365-2036
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Background : In functional gastrointestinal (GI) disorders including functional dyspepsia (FD) and irritable bowel syndrome (IBS), there might be no small extent of contributions of psychosomatic factors. As a therapy for IBS patients, the effectiveness of antidepressants has been reported.Aim : In this study, we evaluated the efficacy of H2-receptor antagonist (famotidine) and 5-HT4 receptor agonist (mosapride citrate). In addition, the effect of antidepressants was assessed as the second-step therapy.Methods : Patients complaining upper GI symptoms were diagnosed as FD excluding organic diseases. Randomized patients received 20 mg/day of famotidine or 15 mg/day of mosapride citrate for 4 weeks and the efficacy was compared between the two groups based on a 10-point visual analogue scale. When symptoms were not relieved (score improvement 0–2 points), patients received amitriptyline (30 mg/day) or no medication for 4 weeks randomly. Patients who had depression in psychological test (SDS) were omitted.Results : As the first-step therapy, both famotidine and mosapride showed beneficial effects regardless of FD subtypes, age and gender. The efficacy of these two drugs in relieving FD symptoms was not significantly different. In patients who failed in the first-step therapy, amitriptyline showed beneficial effects.Conclusions : These findings might be clinically important in view of the efficient relief of symptoms in FD patients.
    Type of Medium: Electronic Resource
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