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  • 2000-2004  (4)
  • 2000  (4)
  • 1
    Digitale Medien
    Digitale Medien
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 71 (2000), S. 755-757 
    ISSN: 1089-7623
    Quelle: AIP Digital Archive
    Thema: Physik , Elektrotechnik, Elektronik, Nachrichtentechnik
    Notizen: The negative ion source developed at JAERI for the N-NBI was intended to accelerate a 500 keV, 22 A D− beam for 10 s. Two of these ion sources are mounted in the beamline. It has been found that the spatial uniformity of the source plasma is not as good as expected in the design phase of the negative ion sources for JT-60U. The source plasma uniformity has been estimated through measuring spatial distributions of the arc current flowing into each filament group and also the ion saturation current with Langmuir probes placed at ten positions around the extraction area of the plasma grid. We then altered the relative values of the arc current-limiting resistors to the eight filament groups in each source to balance the arc. As a result of the optimization of the arc resistors, the nonuniformity of the source plasma has been reduced. © 2000 American Institute of Physics.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 2
    Digitale Medien
    Digitale Medien
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 113 (2000), S. 2168-2174 
    ISSN: 1089-7690
    Quelle: AIP Digital Archive
    Thema: Physik , Chemie und Pharmazie
    Notizen: We theoretically investigate the internal rotations of the methyl group in substituted toluenes such as fluorotoluene (-F), toluidine (-NH2), cresol (-OH), and tolunitrile (-CN) in the ground, excited, and anionic states. The calculated rotational barriers reproduce well the experimental data. Orbital pictures are given for the barrier variations by excitation and electron attachment. An idea of π*–σ* hyperconjugation is introduced for a comprehensive interpretation of the barrier variations. The π*–σ* hyperconjugation mechanism clarifies the differences among ortho-, meta-, and para-systems, between π-electron donating and accepting substituents, and between first and second excited (anionic) states. © 2000 American Institute of Physics.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 3
    Digitale Medien
    Digitale Medien
    Springer
    Clinical and experimental nephrology 4 (2000), S. 356-359 
    ISSN: 1437-7799
    Schlagwort(e): Key words Continuous ambulatory peritoneal dialysis ; Vitelline duct ; Intestinal obstruction
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Abstract A 64-year old Japanese man began to experience intermittent epigastralgia, nausea, and vomiting just after commencing continuous ambulatory peritoneal dialysis (CAPD). Fourteen months after commencing CAPD, he had an intestinal obstruction. Because enhanced radiographs of the small intestine revealed that the occluded site was near the umbilicus, it was suggested that a remnant of the vitelline duct had adhered to and occluded the small intestine. Conservative treatment for the intestinal obstruction was not effective, and laparotomy was then performed. During the laparotomy, the first finding was a remnant of ligament-like vitelline duct connecting the protruding umbilicus and the small intestine. The second finding was that the small intestine was twisted around the remnant of the ligament-like vitelline duct at an angle of about 180° and completely occluded the intestine. Before the patient commenced CAPD, the remnant of the vitelline duct was asymptomatic, but it became symptomatic and finally caused intestinal obstruction after he commenced CAPD. This clinical course strongly suggested that the cue for the bowel obstruction caused by the remnant was the commencement of CAPD. This is the first report, to our knowledge, mentioning the relationship between CAPD and a remnant of the vitelline duct.
    Materialart: Digitale Medien
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  • 4
    Digitale Medien
    Digitale Medien
    Springer
    International journal of clinical oncology 5 (2000), S. 109-115 
    ISSN: 1437-7772
    Schlagwort(e): Key words Endometrial carcinoma ; Younger women ; Ovarian carcinoma
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Abstract Background. Patients under 40 years of age with endometrial carcinoma were compared with patients aged 40 years or more in terms of clinical and histopathological characteristics. Methods. One hundred and fifty-three patients with endometrial carcinoma who had their initial treatment in our hospital between 1980 and 1996 were divided into two groups; those under 40 years of age (group A) and those 40 years or more (group B). They were compared in terms of clinical stage, histological differentiation, degree of myometrial invasion, existence of lymph-vascular invasion, incidence of ovarian carcinoma with endometrial carcinoma, incidence of ovarian metastasis, treatment methods, and prognosis. Results. Fourteen patients (9.2%) were in group A and 139 patients (90.8%) in group B. There were no significant differences in the proportion of stage I patients in the two groups, but the proportion of stage IV patients was significantly higher in group A (P 〈 0.005). There were no significant differences in histological differentiation, degree of myometrial invasion, and the existence of lymph-vascular invasions. The incidence of ovarian carcinoma with endometrial carcinoma was 21.4% for group A and 2.2% for group B, being significantly higher in group A (P 〈 0.005). The incidence of simultaneous ovarian carcinoma with endometrial carcinoma was 14.2% for group A and 1.4% for group B, being significantly higher in group A (P 〈 0.05). The incidence of ovarian metastasis of endometrial carcinoma in groups A and B was 14.2% and 2.9% respectively, showing no significant difference. The incidence of either ovarian carcinoma with endometrial carcinoma or ovarian metastasis of endometrial carcinoma was significantly higher in group A (35.7%) than in group B (5%; P 〈 0.0005). There were no significant differences in the 5-year survival rates. Conclusion. Women aged under 40 years had a significantly higher incidence of ovarian carcinoma associated with endometrial carcinoma and a significantly higher incidence of either ovarian carcinoma with endometrial carcinoma or metastasis of endometrial carcinoma to the ovary than women aged 40 years or more. The 5-year survival rate showed no difference between the groups.
    Materialart: Digitale Medien
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