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Soil Development and Fertility Characteristics of Inland Valleys in the Rain Forest Zone of Nigeria: Mineralogical Composition and Particle-Size Distribution

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Pedosphere 2009年第4期19卷 505-514页

作者： S. S. ABE G. O. OYEDIRAN t. MASUNAGA S. YAMAMOtO t. HONNA t. wakatsuki Africa Rice Center (WARDA) Faculty of Agriculture Tottori University Department of Agronomy Ladoke Akintola University of Technology Ogbamoso (Nigeria) Faculty of Life and Environmental Science Shimane University Faculty of Agriculture Kinki University

the particle-size distribution and mineralogical composition of the clay （〈 2 μm） and fine-sand （0.25-0.10 mm） fractions in soils of two inland valleys in Abakaliki and Bende, Southeast Nigeria, were investigated to provide basic information on soil-forming processes and agricultural potentials. these soils were silty or clayey, deriving from Cretaceous or tertiary shale materials. the particle-size distribution and its computation on a clay-free basis revealed relatively remarkable lithologic breaks in a couple of pedons. the effect of lithologic discontinuities on soil mineralogical composition was not, however, conspicuous. Petrographic investigation revealed that quartz predominantly comprised the fine-sand fraction in the soils at both study sites. Nevertheless, the clay mineralogical composition of the soils was a mixture of kaolinite, irregularly interstratified smectite-illite intergrades （S/I）, hydroxyl-A1 interlayered 2：1 type clays （HICs）, vermiculite, smectite, halloysite and illite along with fine-sized quartz in Abakaliki. the soils of Bende predominantly contained smectite, which was partially interlayered with hydroxyl-A1 and kaolinite. It is suggested that seasonal floodwater has slowed the disintegration of weatherable clay minerals inherited from the shale, while quartz originating from the sandstone is predominant in the fine-sand fraction. Additionally, a possible soil-forming process observed at the both study sites was ferrolysis, which was indicated by a clear decreasing pattern of HICs downward in the soil profiles, the entry of S/I and vertical distribution patterns for a couple of clay minerals in the pedon suggested that the soils in Abakaliki have developed under the significant influence of aeolian dust delivered by the Harmattan. the findings might describe a site-specific deposition pattern of Harmattan dusts as well as hydromorphic soil-forming processes in the wetlands of the inland valleys.

关键词： aeolian dust ferrolysis hydromorphic soil hydroxyl-A1 interlayered 2:1 type clays Southeast Nigeria

Sawah Rice Eco-technology and Actualization of Green Revolution in West Africa: Experience from Nigeria and Ghana

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Rice science 2010年第3期17卷 168-172页

作者： O.I.OLADELE t.wakatsuki Department of Agricultural Economics and Extension North West University (Mafikeng Campus) Faculty of Agriculture Kinki University

the development and dissemination of sawah rice eco-technology in Nigeria and Ghana as prerequisites for the actualization of green revolution in West Africa were described. It showed that the neglect of the eco-technology and the overemphasis of the biotechnology have rendered the ineffective transferability of the green revolution process from Asia to Africa. the sawah eco-technology increases yield up to 5 t/hm2 through bunding and the use of inlet and outlet connecting irrigation and drainage, which enhances effective water control and management, improves the efficiency of fertilizer, improves nitrogen fixation by soil microbes and algae, increases the use of wetlands, improves soil organic matter accumulation, suppresses weed growth, and enhances immune mechanism of rice through nutrient supply. the current experience has therefore established that the technology overcomes the constraints that have limited the realization of green revolution in West Africa.

关键词： sawah rice eco-technology green revolution sub-Saharan Africa rice production

Swelling Properties of Water-Swelling Materials Exposed to Organic Water Pollution

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Journal of Environmental Science and Engineering 2011年第4期5卷 453-459页

作者： S. Inazumi M. Kobayashi t. wakatsuki K. Shishido Department of Urban Management Kyoto University Kyoto 6158540 Japan Nihon Chemical Paints Co. Ltd. Kanagawa 2521111 Japan tomec Corporation Tokyo 1050012 Japan

A water-swelling material is one of the rubbery impermeable materials which mixed synthetic resin elastomers as a base material, high absorbency polymers, filler and solvents. In this study, swelling characteristics of the water-swelling material on the water polluted with COD and BOD, as an impermeable material at coastal landfill sites, are examined by laboratory swelling ratio test. Furthermore, the factor in which it influences the swelling pressure of water-swelling material is clarified by measuring the swelling pressure. As the results, the COD nor the BOD concentrations in the soaked water influence the swelling ratio of the water-swelling material. When the thicknesses of water-swelling material are 2 mm and 3 mm, the maximum swelling pressure of 0.5 MPa or more that corresponds to hydraulic pressure by depth of 50 m is possessed.

关键词： Coastal landfill site swelling pressure swelling ratio water-swelling material

步行6min负荷超声心动图预测结缔组织病患者远期显性肺高血压

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中华高血压杂志 2015年第10期23卷 987-988页

作者： Kusunose K Yamada H Hotchi J Bando M Nishio S Hirata Y Ise t Yamaguchi K Yagi S Soeki t wakatsuki t Kishi J Sata M 曲浥晨机构不详

肺高血压是结缔组织病（connective tissue disease,CtD）的主要死因。运动负荷试验已用于筛查早期肺高血压[1],但由于缺乏相关证据,最新的指南已停止其作为发现肺高血压的方法。近期研究发现平均肺动脉压（mean pulmonary arterial pre... 详细信息

肺高血压是结缔组织病（connective tissue disease,CtD）的主要死因。运动负荷试验已用于筛查早期肺高血压[1],但由于缺乏相关证据,最新的指南已停止其作为发现肺高血压的方法。近期研究发现平均肺动脉压（mean pulmonary arterial pressure,mPAP）升高导致心输出量异常可用于评估肺高血压进展及肺功能分级[2]。该研究将步行6min后的超声心动图参数作为非侵入性负荷试验。

关键词：负荷超声心动图 in 运动负荷试验平均肺动脉压心输出量 connective 结缔组织病左心室射血分数肺功能分级肺毛细血管楔压

蛋白酶激活受体2在载脂蛋白E缺陷小鼠的血管炎症和动脉粥样硬化中发挥关键作用

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中华高血压杂志 2018年第6期26卷 599-599页

作者： Hara t Phuong Pt Fukuda D Yamaguchi K Murata C Nishimoto S Yagi S Kusunose K Yamada H Soeki t wakatsuki t Imoto I Shimabukuro M Sata M 刘青叶鹏

凝血系统与血管炎症密切相关,尽管其潜在机制仍不清楚。最近的研究结果表明,蛋白酶激活受体（protease-activated receptor,PAR）2——活化因子X（activated factor X,FXa）的主要受体之一——在血管细胞和白细胞中均有表达,这提示PAR-... 详细信息

凝血系统与血管炎症密切相关,尽管其潜在机制仍不清楚。最近的研究结果表明,蛋白酶激活受体（protease-activated receptor,PAR）2——活化因子X（activated factor X,FXa）的主要受体之一——在血管细胞和白细胞中均有表达,这提示PAR-2可能参与炎症性疾病的发病机制。

关键词：蛋白酶激活受体2 血管炎症载脂蛋白E缺陷动脉粥样硬化 receptor 小鼠炎症性疾病 PAR-2

Novel insights into the mechanism of reactive oxygen species-mediated neurodegeneration

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Neural Regeneration Research 2023年第4期18卷 746-749页

作者： Shuji wakatsuki toshiyuki Araki Department of Peripheral Nervous System Research National Institute of NeuroscienceNational Center of Neurology and PsychiatryTokyoJapan

Neurite degeneration,a major component of many neurodegenerative diseases,such as Parkinson’s disease,Alzheimer’s disease,and amyotrophic lateral sclerosis,is not part of the typical apoptosis signaling mechanism,but rather it appears that a self-destructive process is in *** stress is a well-known inducer of neurodegenerative pathways:neuronal cell death and neurite *** oxidative stress exerts cytotoxic effects leading to neuronal loss,the pathogenic mechanisms and precise signaling pathways by which oxidative stress causes neurite degeneration have remained entirely *** previously reported that reactive oxygen species generated by NADPH oxidases induce activation of the E3 ubiquitin ligase ZNRF1 in neurons,which promotes neurite *** this process,the phosphorylation of an NADPH oxidase subunit p47-phox at the 345serine residue serves as an important checkpoint to initiate the ZNRF1-dependent neurite *** provides new insights into the mechanism of reactive oxygen species-mediated *** this review,we focus specifically on reactive oxygen species-induced neurite degeneration by highlighting a phosphorylation-dependent regulation of the molecular interaction between ZNRF1 and the NADPH oxidase complex.

关键词： neurite degeneration oxidative stress phosphorylation reactive oxygen species ubiquitin ligase

transport mechanism in chemically reactive hybrid nanofluid flow containing gyrotactic micro-organisms over a curved oscillatory surface

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Applied Mathematics and Mechanics(English Edition) 2025年第1期46卷 177-192页

作者： M.NAVEED M.IMRAN t.ASGHAR Z.ABBAS Department of Mathematics Division of Science and TechnologyUniversity of Education Department of Mathematics The Islamia University of Bahawalpur

this paper examines the transport analysis, including both heat transfer and mass transfer, in hybrid nanofluid flow containing gyrotactic microorganisms towards a curved oscillatory surface. the influence of magnetic fields is also inspected in terms of their physical characteristics. to depict the phenomena of transport, modified versions of both Fick's and Fourier's laws are used. Additionally, the characteristics of both heterogeneous and homogeneous chemical reactions are also incorporated. Utilizing a curvilinear coordinate system, the flow problem is formulated as partial differential equations(PDEs)for momentum, concentration, microorganism field, and energy. An analytical solution to the obtained flow equations is achieved utilizing the homotopy analysis method(HAM).the effects of significant flow parameters on the pressure and microorganism fields, velocity, oscillation velocity, concentration, and temperature distributions are shown via graphs. Furthermore, the variations in skin friction, mass transfer rate, heat transfer rate, and local motile number due to different involved parameters are presented in tables and are analyzed in detail. Graphical results indicate that the curves of velocity and temperature fields are enhanced as the values of the solid volume fraction variables *** is also verified that the concentration rate field decreases as the values of the homogeneous reaction strength parameter and the radius of curvature parameter increase, and it increases with the Schmidt number and the heterogeneous reaction strength *** outcomes show a favorable response of the motile number to advanced values of the Peclet number, the Schmidt number, the microorganism difference parameter, and the bio-convective Lewis number.

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Social Factors Affecting Wetlands Utilization for Agriculture in Nigeria: A case study of sawah rice production

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Rice science 2008年第2期15卷 150-152页

作者： OLADELE Oladimeji Idowu toshiyuki wakatsuki Department of Agricultural Extension and Rural Development University of Ibadan Faculty of Agriculture Kinki University

Wetlands have immense poverty-fighting potentials and in Nigeria, more and more people are dependent on wetlands for their livelihoods. to examine the social factors affecting the current status of the wetlands utilization for agriculture in Nigeda, a simple random sampling technique was used to select 200 farmers cultivating wetlands and a structured questionnaire was applied to elicit the information on the social factors. Data collected were described using frequency and percentage and a multiple regression analysis was used to identify significant variables that are determinants of wetland utilization. the results of the analysis showed that significant variables included crop preferences, farming system, culture, taste, land tenure, knowledge of wetland cultivation, perceived suitability, farmers＇ tribe, location of wetland, and farmers＇ age. it was concluded with suggestions for the right combination of policies, public awareness, and appropriate farming methods in order to improve wetland utilization in Nigeria.

关键词： social factors current status wetlands utilization agriculture sawah rice production

Free vibration and transient response of double curved beams connected by intermediate straight beams

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Applied Mathematics and Mechanics(English Edition) 2025年第1期46卷 37-62页

作者： R.A.JAFARI-tALOOKOLAEI H.GHANDVAR E.JUMAEV S.KHAtIR t.CUONG-LE School of Mechanical Engineering Babol Noshirvani University of Technology Department of Mechanical Engineering Faculty of Engineering New Uzbekistan University University of Business and Science Center for Engineering Application and technology Solutions Ho Chi Minh City Open University

this paper investigates the free vibration and transient response of interconnected structures including double curved beams and intermediate straight beams,which are all constructed from functionally graded porous(FGP) materials. the strain potential and kinetic energies of each beam along with the work done by the external force are calculated. Additionally, a higher-order beam element is introduced to derive stiffness and mass matrices, along with the force vector. the curved and straight beams are discretized, and their assembled stiffness, mass matrices, and force vectors, are *** conditions at the joints are used to derive the total matrices of the entire structure. Subsequently, the natural frequencies and transient response of the system are determined. the accuracy of the mathematical model and the self-developed computer program is validated through the comparison of the obtained results with those of the existing literature and commercial software ANSYS, demonstrating excellent ***, a comprehensive study is conducted to investigate the effects of various parameters on the free vibration and transient response of the considered structure.

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