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Kawai, Hiroshi,Kamiya, Mitsunobu,Komatsu, Teruhisa,Nakaoka, Masahiro,Yamamoto, Tomoko,Marine Life Research Group of Takeno, Marine Life Research Group of Takeno The Korean Society of Phycology 2007 ALGAE Vol.22 No.1
In order to understand the impact of the heavy-oil pollution by the 1997 Nakhodka oil spill on the intertidal macroalgal vegetation, we have been monitoring succession in the intertidal flora since 1997 at Oh-ura, Takno, and Imago-Ura Cove, Kasumi in Hyogo Prefecture, northwestern coast of Honshu, Japan. We employed two different monitoring methods: 1) The percent cover of macro-algae (seaweeds) in 1 x 1 m quadrats along 450 m intertidal transects parallel to the shoreline were assessed and recorded by photographic imaging until 2002, and for 30-40 m transects of the most heavily polluted areas in 2004 and 2006; 2) The percent cover of macro-algae in 0.5 x 0.5 m quadrats along a transect line perpendicular to the shore were recorded and all macrophytes within the quadrat were completely removed to record the wet weight of each taxon (1997-2006). Based on the monitoring data, we conclude that the high intertidal zone at Imago-ura, where a large part of the stranded oil accumulated, suffered the heaviest damage and experienced the slowest recovery. In addition, although the original status of macroalgal vegetation before the impact was not well-documented, it appeared that recovery from the damage caused by the oil pollution required four to five years.
Optimization of Cellulose Extraction from Jute Fiber by Box-behnken Design
Lizandro Manzato,Mitsuo Lopes Takeno,Wanison André Gil Pessoa-Junior,Luis André Morais Mariuba,John Simonsen 한국섬유공학회 2018 Fibers and polymers Vol.19 No.2
Cellulose was isolated from plant material for the first time in 1839 by the French chemist Anselme Payen. In recent years, due to the need in reduce the world’s environmental problems, there has been an increase in studies related to the physical and chemical factors of cellulose. It is important to emphasize that experiments and studies with a cellulose occur individually, because of the variation in the amount of cellulose and the extraction method that differs from plant to plant. In the present study, we determined the optimal conditions for cellulose extraction of jute fiber, using the response surface method. The Box-Behnken Design (BBD) was used statistically evaluate the ratio effects of sodium hydroxide (NaOH) and sodium hypochlorite (NaClO), temperature and extraction time in the process used. The analysis of the results showed a significant variable in the linear and quadratic terms of the temperature and also a significant level of interaction in the effect between the variables of temperature and time. Besides this, the BBD used for the analysis of the extraction yield, resulted in a polynomial regression of second order, in complete agreement with experimental results, with R2=0.9627 (p<0.05). The optimal condition was obtained in a ratio of 1.3 at 45 oC for 2 h. Under the best possible conditions, the obtained experimental value is in accordance with the value predicted by the model, thus indicating a model combination and success to optimize the extraction conditions of the jute fiber pulp in the response surface methodology.
kohei Sugihara,H. Takeno,T. Yamamoto,Y. Yasaka 한국물리학회 2006 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.49 No.III
In D-3He nuclear fusion, a traveling wave direct energy converter (TWDEC) is expected to recover the energy of produced protons. The paper presents results of a simulation experiment of the TWDEC. A new circuit, which provides complete matching between the beam velocity and phase velocity of a traveling wave, was designed and constructed. The deceleration efficiency qualitatively varied similarly to numerical calculations. The quantitative discrepancy is considered to be due to insufficient modulation by the experimental structure.
Experiment on Behavior of Charged Particles in Cusp Direct Energy Converter for D-3He Fusion
takashi Yamamoto,H. Takeno,Y. Kurumatani,Y. Yasaka 한국물리학회 2006 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.49 No.III
It is necessary to separate, discriminate and guide electrons, thermal ions, and fusion protons created from a D-3He reactor in order to convert kinetic to electric power directly. A cusp direct energy converter (CUSPDEC) is expected to achieve the above-mentioned role. This paper presents simulation experiments of CUSPDEC. The separation of ions and electrons is done and the kinetic energy of ions separated from electrons is converted to electricity.true
Hiroshi Kawai,the Marine Life Research Group of Takeno,Tomoko Yamamoto,Masahiro Nakaoka,Teruhisa Komatsu,Mitsunobu Kamiya 한국조류학회I 2007 ALGAE Vol.22 No.1
In order to understand the impact of the heavy-oil pollution by the 1997 Nakhodka oil spill on the intertidal macroalgal vegetation, we have been monitoring succession in the intertidal flora since 1997 at Oh-ura, Takno, and Imago-Ura Cove, Kasumi in Hyogo Prefecture, northwestern coast of Honshu, Japan. We employed two different monitoring methods: 1) The percent cover of macro-algae (seaweeds) in 1 x 1 m quadrats along 450 m intertidal transects parallel to the shoreline were assessed and recorded by photographic imaging until 2002, and for 30-40 m transects of the most heavily polluted areas in 2004 and 2006; 2) The percent cover of macro-algae in 0.5 x 0.5 m quadrats along a transect line perpendicular to the shore were recorded and all macrophytes within the quadrat were completely removed to record the wet weight of each taxon (1997-2006). Based on the monitoring data, we conclude that the high intertidal zone at Imago-ura, where a large part of the stranded oil accumulated, suffered the heaviest damage and experienced the slowest recovery. In addition, although the original status of macroalgal vegetation before the impact was not well-documented, it appeared that recovery from the damage caused by the oil pollution required four to five years.
Atsushi Nanashima,Masahide Hiyoshi,Naoya Imamura,Koichi Yano,Takeomi Hamada,Takashi Wada,Takahiro Nishida,Kazuyo Tsuchiya,Fumiaki Kawano,Shinsuke Takeno,Takuto Ikeda 한국간담췌외과학회 2018 Annals of hepato-biliary-pancreatic surgery Vol.22 No.4
Backgrounds/Aims: The present study analyzed the postoperative outcomes in patients who underwent hepatectomy or pancreatectomy, with a history of intra-abdominal surgery involving other organs, to elucidate surgical efficacy. Methods: We examined the perioperative parameters in 28 patients who underwent hepatectomy (n=12) and pancreatectomy (n=16) after receiving prior abdominal organ resection (esophagectomy, n=2; gastrectomy, n=5; resection of small intestine, n=2; appendectomy, n=5; colorectal resection, n=9; hepatectomy, n=1; cholecystectomy, n=3; splenectomy, n=2, pancreatectomy ,right adrenectomy, nephrectomy and myoma uteri, n=1 each). Results: Age, gender, a history of comorbidities, and primary diseases were not significantly different between the groups. The present operation was predominantly indicated for liver metastases in all patients undergoing hepatectomy. Several diseases were detected in pancreaticoduodenectomy (PD) patients. Laboratory data were not significantly different between groups. Although operating time and blood loss during hepatectomy did not differ significantly between the groups, the operating time was significantly longer in patients undergoing PD compared with distal pancreatectomy (p<0.05). Red cell blood transfusion was most frequently used in patients who underwent major hepatectomy and PD (p<0.05). The prevalence of postoperative complications was not significantly different between groups. Hospital death was not observed and the period of hospital stay did not differ between groups. Conclusions: Carefully scheduled hepatectomy or pancreatectomy is safe even in cases with prior abdominal surgery under the present strategy.