16 research outputs found

    Bromoform concentrations in slush-layer water in Antarctic fast ice

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    Bromoform concentrations in water of the slush layer that developed at the interface between snow and sea ice were measured during the seasonal warming in Lützow-Holm Bay, East Antarctica. Mean bromoform concentration was 5.5 ± 2.4 pmol l-1, which was lower than that of the under-ice water (10.9 ± 3.5 pmol l-1). Temporal decrease in bromoform concentrations and salinity with increasing temperature of the slush water suggest that the bromoform concentrations were reduced through dilution with meltwater input from the upper surface of sea ice. In contrast, bromoform concentrations in the under-ice water increased during this period while the salinity of the under-ice water decreased. It is speculated that the sea ice meltwater input contained high bromoform concentrations from the brine channels within the sea ice and from the bottom of the ice that were contributed to the increased bromoform concentrations in the under-ice water

    大阪アジア主義の理想と現実 : 1934年清水銀藏の中国旅行を中心に

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    After Naitō's death, the development of Orient Culture Alliance fell into a dilemma. For the future of the alliance, Simizu Ginzō, one of the founders of the alliance, began an inspection tour in China. In this process, he met with Zheng Xiaoxu, Hu Shih, Jiang Menglin and Wu Tiecheng. After returning home, Shimizu sorted out the experience of this trip into an article mansisisatukityōdan (滿支視察歸朝談) in the tōhōbunka renmeikaisi (東方文化聯盟會誌) No. 5. Taking this article as the core, the author tries to explore this important event in the development of the Oriental Cultural Alliance by investigating and analyzing the process of Shimizu Ginzō's visit to China.陶徳民教授古稀記念号departmental bulletin pape

    The Infiltration of the Cervical Carcinoma into the Vaginal Wall and the Relationship between the Cancer Infiltration into the Vaginal Wall and the Recurrence at the Vaginal Stump Section Ⅰ. The Infiltration of the Cervical Carcinoma into the Vaginal Wall Section Ⅱ. The Relationship between the Cancer Infiltration into the Vaginal Wall and the Recurrence at the Stump of the Vagina

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    For the carcinoma of the cervix the vaginal wall can be an object of cancer invasion, and it is closely associated with the postoperative recurrence at the stump of the vagina and also with the prognosis. In the present study the author carried out histological investigations of the vaginal wall of the patients who had Okabayashi's radical extensive hysterectomy in our clinic; and in Section Ⅰ are presented the results of investigations on the manner of cancer invasion into the vaginal wall in 160 recent unselected cases, and in Section Ⅱ the relationship between the recurrence at the vaginal stump and the vaginal-wall invasion as well as prophylactic effect of concomitant use of radium on the recurrence at the vaginal stump are described concerning 102 older specimens. Section 1. As for the invasion of the cervical carcinoma 62 cases (38.8%) out of 160 cases have been verified to have the cancer invasion, and there are some differences between the macroscopic and histological findings; and even in the 39 cases whose findings coincide with one another, in about one third of them the cancer invasion has been found 5 mm deeper in the histological examination than in the macroscopic examination. Next, the incidence of the cancer invasion into the vaginal wall is greater in more advanced age; more in the cervical canal cancer than cancer in the vaginal portion; more frequeut in Stage Ⅱ than in Stage Ⅰ; in a retrocessive type of growth; in the case where the outward appearance of the lesion is ulcerous; in the C.P.L. classification more in L-type; and more in the case where the cancer propagated to the endometrium than in the case without such apropagation; likewise in the case where the cancer propagated to the corpus uterus; and more frequent in the case with lymph node metastasis. As for the incidence of the cancer infiltration to various layers of the vaginal wall, the epidermal infiltration, the epidermal + submucous tissue, and the epidermal + submucous + muscular layers occupy two thirds of the total, and as for the invasion of each layer it is slightly more frequent in the epidermal layer. No difference can be observed in the frequency of the cancer invasion as regrads the sites of the vaginal wall (anterior, posterior, right, and left), and the cancer infiltration into the vaginal wall is always contiguous. Section Ⅱ. As regards the relationship between the cancer invasion into the vaginal wall and the recurrence at the stump of the vagina, out of 47 cases with recurrence 35 cases (74.4%) proved to have infiltration into the vaginal wall, and 8 cases had the cancer invasion penetrated as far as the vaginal stump. In those that had the recurrence at the vaginal stump the majority of them consisted of the vaginal cancer, cancer of Stage Ⅱ and Ⅲ, ulcerous exterior appearance, retrocessive type of growth, L Type, and moderately matured type. In comparing the 35 recurrent cases having the cancer invasion into the vaginal wall with those cases without recurrence at the vaginal stump, it has been clarified that the recurrence at the vaginal stump is more liable to occur in Type L with the vaginal-wall invasion and in the case whose distance between the tip of the infiltration and the stump end is less than 5 mm. Moreover, for the prevention of the recurrence at the vaginal stump taking the data in Section I into consideration, for the cases without vaginal-wall infiltration the conventional 3 cm-resection of the vaginal wall is indicated, while for the cases with vaginal-wall infiltration it is necessary to resect the vaginal wall over 1.8 cm. below the tip of macroscopic infiltration in view of the shrinkage of the specimens examined and the fact that histologically the infiltration goes deeper than macroscopic finding. In addition, when the cancer infiltration is marked and there is a danger of recurrence it is possible to prevent such a recurrence by radium therapy. In our laboratory the proximal dosage of radium used is 1,000 mg elh

    An artificial pool experiment in Antarctic sea ice : effects of sea ice melting on physical and biogeochemical components of pool water

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    We performed an artificial pool experiment in the Antarctic multi-year land-fast ice to examine and simulate the effect of sea ice melting on physical and biogeochemical components of the sea ice field. The input of snow and ice meltwater resulted in warmer, low salinity water at the surface of the pool and probably stratification of the less dense water. Current speed measurements also pointed to water stratification within the pool. Rapid phytoplankton growth in the pool resulted in drastic decreases in concentrations of dissolved inorganic carbon and nutrients (NO3- and Si(OH)4) in the surface waters of the pool, particularly depleted for NO3-. There was high correlation between variations of dissolved inorganic carbon and nutrient concentrations, but the apparent uptake ratios of these components deviated from that generally applied to marine phytoplankton. The sequence of changes in the physical and biogeochemical components of the pool water suggests that the onset of rapid phytoplankton growth was closely related to the water stratification, which provided stable conditions for phytoplankton bloom even though the supply of nutrients from under-ice water would have declined

    A study on exposed column-base with brace and horizontal displacement constraint plate bonding concrete footing

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    application/pdfBy installing a horizontal displacement restraining member on the exposed column base with braces, without the action of shear forces to the anchor bolt, the stress state is indicated to be a clear. This paper established the horizontal displacement restraining member with an adhesive, it has been confirmed rigidity and strength of the horizontal displacement restraining member. Numerical analysis is carried out using the rigidity of the horizontal displacement restraint obtained from the experiment to study the modeling of the horizontal displacement restraint material.departmental bulletin pape

    Ciliates rapidly enhance the frequency of conjugation between Escherichia coli strains through bacterial accumulation in vesicles

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    The mechanism underlying bacterial conjugation through protozoa was investigated. Kanamycin-resistant Escherichia coli SM10λ+ carrying pRT733 with TnphoA was used as donor bacteria and introduced by conjugation into ciprofloxacin-resistant E. coli clinical isolate recipient bacteria. Equal amounts of donor and recipient bacteria were mixed together in the presence or absence of protozoa (ciliates, free-living amoebae, myxamoebae) in Page's amoeba saline for 24 h. Transconjugants were selected with Luria Broth agar containing kanamycin and ciprofloxacin. The frequency of conjugation was estimated as the number of transconjugants for each recipient. Conjugation frequency in the presence of ciliates was estimated to be approximately 10^[-6], but in the absence of ciliates, or in the presence of other protozoa, it was approximately 10^[-8]. Conjugation also occurred in culture of ciliates at least 2 h after incubation. Successful conjugation was confirmed by polymerase chain reaction. Addition of cycloheximide or latrunculin B resulted in suppression of conjugation. Heat killing the ciliates or bacteria had no effect on conjugation frequency. Co-localization of green fluorescent protein-expressing E. coli and PKH67-vital stained E. coli was observed in the same ciliate vesicles, suggesting that both donor and recipient bacteria had accumulated in the same vesicle. In this study, the conjugation frequency of bacteria was found to be significantly higher in vesicles purified from ciliates than those in culture suspension. We conclude that ciliates rapidly enhance the conjugation of E. coli strains through bacterial accumulation in vesicles
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