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Journal of Environmental Science and Engineering(A) 2016年第5期5卷 259-266页

作者： Kiichi Sasaki Choichi Sasaki chihiro kato Takeyuki Annaka Nobuhiko Matsuyama The United Graduate School of Agricultural Sciences lwate University Morioka 020-8550 Japan Faculty of Agriculture and Life Science Hirosaki University Hirosaki 036-8561 Japan Faculty of Agriculture Yamagata University Tsuruoka 997-8555 Japan

The objective of this study is to clarify the effects of the thickness of soil dressing, the percolation patterns of plowsole and subsoil on reducing cadmium （Cd） uptake, and growth and yields of rice plants. Six stratified paddy field models, three patterns of soil dressing layer and two percolation patterns were used for the experiments. These models had 12.5 cm, 15.0 cm and 25.0 cm thickness of soil dressing layer and 15 cm thickness of underlying polluted soil layer, whose Cd concentration was about 1.81 mg·kg^-1. As a result Cd concentration of brown rice was lower than 0.04 mg·kg^-1 for the models with the close system percolation, while that in the open system percolation models were lower than 0.17 *** the thickness of soil dressing became lower, Cd concentrations with the open system percolation models showed significantly higher values than those of the other models （5% of significant level）. But any significant difference was not found in the growth and yield among these models. As above mentioned, it was found that Cd concentration in rice grains was affected by the thickness of soil dressing and percolation patterns.

关键词： Cadmium rice percolation patterns soil dressing.

Groundwater Level Effect on Redox Potential, on Cadmium Uptake and Yield of Soybean

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American Journal of Plant Sciences 2014年第20期5卷 3022-3031页

作者： Md. Zahidul Haque Choichi Sasaki Nobuhiko Matsuyama Takeyuki Annaka chihiro kato United Graduate School of Agricultural Sciences (UGAS) Iwate University Morioka Japan Faculty of Agriculture and Life Science Hirosaki University Hirosaki Japan Faculty of Agriculture Yamagata University Tsuruoka Japan

In this greenhouse experiment, we investigated the effects of two constant groundwater levels: 10 cm groundwater level (GW-10) and 40 cm groundwater level (GW-40) and one change groundwater level, which was 40-10-40 cm (GW-40-10-40) on Cadmium (Cd) uptake and seed yield of Soybean plant in Cd contaminated soils (1.57 mg·kg-1). The experimental soil layer was made with gravel layer (14 cm), non-polluted soil (15 cm) and polluted soil (25 cm). The redox potential of every soil layer was measured from sowing to harvesting. The soil layer (10 – 40 cm) of GW-10 was always in reduction condition and that of GW-40 was always in oxidation condition. First 50 days of GW 40-10-40 were in oxidation and next 50 days in reduction and final 20 days again returned in oxidation condition. Soybean seed Cd concentration was significantly highest in GW-40-10-40 (1.16 ± 0.13 mg·kg-1) and lowest in GW-40 (0.81 ± 0.12 mg·kg-1). Cd concentration of stem was found significantly higher in GW-40 (1.7 ± 0.2 mg·kg-1) than GW-10 (0.91 ± 0.08 mg·kg-1) and GW-40-10-40 (1.28 ± 0.13 mg·kg-1). There was no significant difference in root Cd concentration among these 3 treatments. Main stem height of soybean plant and 100 seed weight of GW-40 were significantly higher than those of GW-10. The result revealed that, soil redox condition is an important factor for Cd uptake in soybean plant and seed yield of soybean. This study will help to manage the farming process more appropriately with the aim of minimizing uptake of Cd and other toxic metals in grain crops.

关键词： Groundwater Level Redox Potential (Eh) Cadmium Uptake Soybean Seed Yield

Influence of Percolation Patterns and Soil Copper Concentration on Copper Uptake,and Growth and Yield with Copper-Polluted Stratified Paddy Fields

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Journal of Environmental Science and Engineering(A) 2018年第4期7卷 180-188页

作者： Jinhun Fan Choichi Sasaki chihiro kato Nobuhiko Matsuyama Takeyuki Annaka Akira Endo Songtao Li The United Graduate School of Agricultural Sciences Iwate UniversityMorioka 020-8550Japan Faculty of Agriculture and Life Science Hirosaki UniversityHirosaki 036-8561Japan Faculty of Agriculture Yamagata UniversityTsuruoka 997-8555Japan

Copper(Cu)was designated as a specific substance in the Agricultural Land Soil Pollution Prevention Act in *** has been known that high Cu concentrations in soil layers reduce rice crop production and thus agricultural practices such as soil dressing have been applied to minimize the damages to crops by copper *** this study,authors investigated the effects of percolation patterns of the under-plowsole and subsoil on growth and yield,and copper uptake of paddy *** stratified paddy field models were constructed to conduct the growth tests under the condition in which the percolation patterns of the under-plowsole and subsoil were in an open and closed *** models have a plow layer(10 cm thickness)and upper-plowsole(2.5 cm thickness)made with 12.5 cm-thickness of non-polluted soil dressing(3.7 mgCu?kg-1)and an underlying 15 cm-thickness of polluted under-plowsole(7.5 cm thickness)and subsoil whose Cu concentration was higher or lower than Japanese safety standard(approximately 100 mgCu?kg-1,150 mgCu?kg-1 and 500 mgCu?kg-1,respectively).During the tests,a constant water-ponding system was adopted,and mid-summer drainage was not *** a result,Cu concentrations of the rice grains were 5%significantly higher in the open system percolation models regardless of the original amount of Cu in the under-plowsole and *** the other hand,authors did not recognize any significant differences in growth and yield of rice plants among the *** concluded that the Cu concentrations in rice plants are affected by percolation patterns of polluted plowsole and subsoil even though they are covered with non-polluted soil dressing layers.

关键词： Copper rice plant percolation patterns soil dressing

Surgery for pancreatic tumors in the midst of COVID-19 pandemic

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World Journal of Clinical Cases 2021年第18期9卷 4460-4466页

作者： Hiroyuki kato Yukio Asano Satoshi Arakawa Masahiro Ito Norihiko Kawabe Masahiro Shimura chihiro Hayashi Takayuki Ochi Hironobu Yasuoka Takahiko Higashiguchi Yuka Kondo Hidetoshi Nagata Akihiko Horiguchi Department of Gastroenterological Surgery Fujita Health University School of Medicine Bantane HospitalNagoya 454-8509Japan

The spread of the new coronavirus(COVID-19)infection in 2020 has had a significant impact on the treatment of cancer *** the COVID-19 pandemic,the biggest challenge for pancreatic surgeons is the difficulty in providing oncological *** this review article,from the standpoint of surgeons,we explain the concept of triaging of patients with pancreatic tumors under the COVID-19 pandemic,and the actual impact of COVID-19 on the treatment of patients with pancreatic *** most vital points in selecting the best therapeutic approach for patients with pancreatic tumors during this pandemic are(1)Oncologists need to tailor the treatment plan based on the COVID-19 phase,tumor malignant potential,and patients’comorbidities;and(2)Optimal treatment for pancreatic cancer should be planned according to the condition of each patient and tumor resectability based on national comprehensive cancer network resectability *** choose the best therapeutic approach for patients with pancreatic tumors during this pandemic,we need to tailor the treatment plan based on elective surgery acuity scale(ESAS).Newly established ESAS for pancreatic tumor and flowchart indicating the treatment strategy of pancreatic cancer,are feasible to overcome this situation.

关键词： COVID-19 Pancreatic ductal adenocarcinoma Surgical treatment Pancreatic tumor Pandemic National comprehensive cancer network resectability criteria

Comparing reduced-dose sodium phosphate tablets to 2L of polyethylene glycol: A randomized study

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World Journal of Gastroenterology 2017年第24期23卷 4454-4461页

作者： Soichiro Ako Koji Takemoto Eriko Yasutomi chihiro Sakaguchi Mayu Murakami Tomoko Sunami Shohei Oka Hamada Kenta Noriko Okazaki Yuki Baba Yasushi Yamasaki Toshiyuki Asato Daisuke Kawai Ryuta Takenakai Hirohumi Tsugeno Sakiko Hiraoka Jun kato Shigeatsu Fujiki Department of Gastroenterology Tsuyama Chuo HospitalTsuyama City Department of Gastroenterology and Hepatology Okayama University Graduate School of MedicineDentistry and Pharmaceutical Sciences Second Department of Internal Medicine Wakayama Medical UniversityWakayama city

To compare the tolerability and quality of bowel cleansing between 2 L polyethylene glycol (PEG) and reduced-dose sodium phosphate (NaP) tablets as a preparation for colonoscopy. METHODSTwo hundred patients were randomly assigned to the PEG or NaP groups at the same ratio. The NaP group patients took 30 tablets with 2 L of clear liquid, while the PEG group patients took 2L of PEG. Tolerability was assessed by a questionnaire about taste, volume, and the overall impression. The bowel cleansing quality was evaluated by colonoscopists. RESULTSAlthough NaP showed better tolerability in terms of taste, volume and overall impression (P < 0.01, P < 0.01 and P = 0.02, respectively), the overall cleansing quality was better in the PEG group (P < 0.01). A subgroup analysis, stratified by sex and age, indicated that NaP was associated with better tolerability and equivalent bowel cleansing quality in females of < 50 years of age. CONCLUSIONDespite the better tolerability, the use of 30 NaP tablets with 2 L of clear liquid should be limited due to its lower cleansing quality; however, in certain cases the regimen may deserve consideration, particularly in cases involving young women.

关键词： Colonoscopy Sodium phosphate tablets Polyethylene glycol Preparation