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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

Job Satisfaction and Mental Health among Physicians in Primary Health Care Centers in Kuwait

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Health 2019年第6期11卷 692-710页

作者： Rihab Al-Wotayan Mahmoud annaka Maqsood Nazar Central Department of Primary Health Care Ministry of Health Kuwait Statistics and Indicators Office Central Department of PHC Ministry of Health Kuwait

Objectives: To measure the level of job satisfaction among primary health care physicians Ministry of Health (MOH) Primary Healthcare Center (PHC) physicians, to evaluate the physicians’ mental health, and to assess their associated factors. Study Setting: Kuwait Ministry of Health, Primary Care Centers. Study Design: Cross-sectional study. Data Collection: The study was conducted from July to September, 2017. Of 746 questionnaires distributed to all PHC physicians in the MOH, 417 questionnaires were completed. Information was collected on socio-demographic characteristics, work and health-related factors, job satisfaction (using the Warr-Cook-Wall job satisfaction scale), and mental health (using General Health Questionnaire). Principal Findings: Of participants, 40.8% were male, and 24.9% were Kuwaitis. Median overall job satisfaction was 71.4%. There were significant differences in overall job satisfaction with the physician rank (p = 0.008) and governorate (p = 0.05). The GPs were moderately satisfied with work surroundings;work freedom;recognition;degree of responsibility;salary;opportunity to use abilities;attention given to suggestions;relationship with hospital physicians, colleagues, and fellow workers;relations between management and workers;working hours;and the amount of variety in their job, but more satisfied with their immediate supervisors. Conclusions: Job satisfaction of PHC physicians is critical for the improvement of health systems. This study showed that GPs (General Practitioners) were more satisfied overall than previously reported studies done in Kuwait. They were moderately satisfied with their salary and the amount of variety in work.

关键词： Physicians Job Satisfaction Primary Health Care Centers Kuwait

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日本大地震对日本汽车和电子产业的影响

日本大地震对日本汽车和电子产业的影响

作者：安中英子（annaka EIKO）哈尔滨工业大学

学位级别：硕士

2011年3月11日，日本当地时间14时46分，在日本东北部地区发生了9.0级大地震，并且地震引起了大海啸，由于地震的原因，福岛县核电站遭到了破坏，而且发生了核泄漏事故，产生日本汽车和电子产业的生产工厂停产等特别重大的经济损失及人... 详细信息

2011年3月11日，日本当地时间14时46分，在日本东北部地区发生了9.0级大地震，并且地震引起了大海啸，由于地震的原因，福岛县核电站遭到了破坏，而且发生了核泄漏事故，产生日本汽车和电子产业的生产工厂停产等特别重大的经济损失及人员伤亡。这次大地震所造成的灾害可以说是至今最大规模，以东北地区为中心的灾区是日本汽车、电子、半导体产业等制造业的基础工业地区，特别是生产供应链的断裂对企业活动产生甚大影响，生产活动停滞数个月，其影响不止对日本国内也波及到国外其他国家。通过这次地震产生的影响重新认识到了东北地区的日本制造业在世界上的重要角色。由于生产供应链的断裂造成了零部件供应不足而导致各大汽车和电子生产厂商停止了生产活动，并对销售方面也产生了影响。日本的制造业生产供应链一直以来都被认为是非常强大的，但为何面对于大地震这样的灾难是如此的脆弱？究竟哪些因素是生产供应链断裂的原因？如何使其恢复到往日的优势地位？分析生产供应链问题后对汽车和电子产业的生产量、进出口量、销售量的影响也做出数据分析。本文在借鉴了国内外学者对生产供应链的相关研究基础上，对日本应如何恢复制造业所带来的损失，并且为了避免再次发生同样的严重问题和如何回避风险，然后对其找出日本重建汽车和电子产业的四个相关对策，从而构建更强大的日本制造产业。

关键词：日本大地震汽车和电子产业生产供应链灾后重建