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玻璃态高分子膜中有机溶剂传质行为研究

化工进展 2003年第z1期22卷 146-150页

作者：王保国山口猛央中尾真一清华大学化学工程系北京100084 日本东京大学工学部化学工程系东京113-8656 日本东京大学工学部化学工程系东京113-8656

针对有机溶剂在玻璃态高分子膜中的渗透现象,提出基于物性推算法的膜分离材料选择方法.基于溶解-扩散机理模型,使用统计热力学和状态方程式为基础的GCLF-EOS模型进行溶解度计算、自由体积模型推算扩散系数,同时考虑填充型复合膜的基膜影... 详细信息

针对有机溶剂在玻璃态高分子膜中的渗透现象,提出基于物性推算法的膜分离材料选择方法.基于溶解-扩散机理模型,使用统计热力学和状态方程式为基础的GCLF-EOS模型进行溶解度计算、自由体积模型推算扩散系数,同时考虑填充型复合膜的基膜影响,建立膜渗透通量计算模型.本研究充分考虑有机溶剂对高分子的塑化效应,通过引入塑化固子,重新评价对传质过程有效的"空穴自由体积",改进现有的自由体积理论模型.利用芳香族溶剂苯的实验数据和理论预测比较,验证溶解性和扩散性理论模型的正确性.在此基础上对芳香族有机溶剂在玻璃态高分子膜中传递行为进行成功预测.

关键词：高分子膜有机溶剂溶解度扩散系数

Morpho-Physiological Response of Oryza glaberrima to Gradual Soil Drying

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Rice science 2020年第1期27卷 67-74页

作者： Kartika KARTIKA Jun-ichi SAKAGAMI Benyamin LAKITAN shin YABUTA Andi WIJAYA Sabaruddin KADIR Laily Ilman WIDURI Erna SIAGA Yoshihiro nakao Graduate School Universitas SriwijayaPalembang 30139Indonesia Faculty of Agriculture Kagoshima University1-21-24 KorimotoKagoshima 890-0065Japan Department of Agronomy College of AgricultureUniversitas SriwijayaInderalaya 30662Indonesia Research Center for Sub-optimal Lands(PUR-PLSO) Sriwijaya UniversityPalembang 30139Indonesia Department of Soil Sciences College of AgricultureUniversitas SriwijayaInderalaya 30662Indonesia The United Graduate School of Agricultural Science Kagoshima University1-21-24 KorimotoKagoshima 890-0065Japan

Soil drought occurrence during dry season has been the main constraint, besides prolonged flooding during rainy season, in increasing cropping intensity and rice productivity in tropical riparian wetland. Use of drought tolerant rice genotype might be a suitable option for overcoming such problem. This study focused on the effects of gradual soil drying during early vegetative growth stage on morphological and physiological traits of five Oryza glaberrima genotypes, namely RAM12, RAM14, RAM59, RAM97 and RAM101, and two Oryza sativa subsp japonica genotypes, i.e. Koshihikari and Minamihatamochi. The plants were subjected to 6 d of gradual soil drying condition from 15 days after transplanting(DAT) to 20 DAT, and were allowed to recover until 22 DAT. Gradual soil drying reduced plant growth as indicated by dry mass accumulation. Drought reduced stomatal conductance and increased leaf rolling score of all the genotypes. All the genotypes showed comparable response on stomatal conductance, but O. glaberrima genotypes performed higher in leaf rolling recovery. Meanwhile, O. sativa genotypes decreased total leaf area and specific leaf area, but increased specific leaf weight in order to avoid further damages due to drought stress. Drought tolerance mechanisms in RAM101, RAM12, RAM59 and RAM14 were associated with leaf morpho-physiological responses, root traits and dry biomass accumulation.

关键词： drought tolerance leaf rolling root trait stomatal conductance dry matter accumulation

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影响啤酒酵母菌吸附铅离子条件的研究

化学与生物工程 2006年第10期23卷 37-39页

作者：李志东李娜邱峰张洪林蒋林时九井裕司中卫真一辽宁石油化工大学环境与生物工程学院辽宁抚顺113001 东京大学

采用啤酒酵母自制生物吸附剂用于吸附金属铅离子,考察了pH值、反应时间、酵母浓度及金属离子浓度对啤酒酵母吸附Pb2+的影响。单因素实验结果表明,当pH值为5.0、溶液初始Pb2+浓度为80 mg.L-1、啤酒酵母的浓度为1.0 g.L-1、反应时间为0.5 ... 详细信息

采用啤酒酵母自制生物吸附剂用于吸附金属铅离子,考察了pH值、反应时间、酵母浓度及金属离子浓度对啤酒酵母吸附Pb2+的影响。单因素实验结果表明,当pH值为5.0、溶液初始Pb2+浓度为80 mg.L-1、啤酒酵母的浓度为1.0 g.L-1、反应时间为0.5 h时,吸附效果最佳。通过正交实验,确定初始Pb2+浓度为反应过程中的显著因素。

关键词：生物吸附重金属 Pb^2+ 啤酒酵母

Effect of Graft Yield on the Thermo-Responsive Permeability Through Porous Membranes with Plasma-Grafted Poly(N-isopropylacrylamide)Gates

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Chinese Journal of Chemical Engineering 2003年第3期11卷 269-275页

作者：褚良银朱家骅陈文梅 NIITSUMA Takuya YAMAGUCHI Takeo nakao shin-ichi School of Chemical Engineering Sichuan UniversityChengdu 610065China Department of Chemical System Engineering University of Tokyo113-8656Japan

The effect of graft yield on both the thermo-responsive hydraulicpermeability and the therrno-responsive diffusional permeability through porous membranes withplasma-grafted poly(N-isopropylacrylamide) (PNIPAM) gates was investigated. Both thermo-responsiveflat membranes and core-shell microcapsule membranes with a wide range of graft yield of PNIPAM wereprepared using a plasma-graft pore-filling polymerization method. The grafted PNIPAM was formedhomogeneously throughout the entire thickness of both the flat polyethylene membranes and themicrocapsule polyamide membranes. Both the hydraulic permeability and the diffusional permeabilitywere heavily dependent on the PNIPAM graft yield. With increasing the graft yield, the hydraulicpermeability (water flux) decreases rapidly at 25℃ because of the decrease of the pore size;however, the water flux at 40℃ increases firstly to a peak because of the increase ofhydrophobicity of the pore surface, and then decreases and finally tends to zero because of the poresize becoming smaller and smaller. For the diffusional permeability, the temperature showsdifferent effects on the diffusional permeability coefficients of solutes across the membranes. Whenthe graft yield was low, the diffusional coefficient of solute across the membrane was higher attemperature above the lower critical solution temperature (LCST) than that below the LCST; however,when the graft yield was high, the diffusional coefficient was lower at temperature above the LCSTthan that below the LCST. It is very important to choose or design a proper graft yield of PNIPAMfor obtaining a desired thermo-responsive 'on/off' hydraulic or diffusional permeability.

关键词： thermo-responsive membrane poly(N-isopropylacrylamide) plasma-graftpore-filling polymerization graft yield hydraulic permeability diffusional permeability

Improving Ambient Wind Environments of a Cross-flow Wind Turbine near a Structure by using an Inlet Guide Structure and a Flow Deflector

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Journal of Thermal Science 2005年第3期14卷 242-248页

作者： Tadakazu TANINO shinichiro nakao Genki UEBAYASHI Nagasaki Institute of Applied Science 536 Aba-machi Nagasaki 851-0193 JapanNagasaki Institute of Applied Science 536 Aba-machi Nagasaki 851-0193 JapanChoryo Engineering Co. Ltd. 5- 717-1 Fukahori-machi Nagasaki 851-0392 Japan

A cross-flow wind turbine near a structure was tested for the performance. The results showed that the performance of a cross-flow wind turbine near a structure was up to 30% higher than the one without a structure. In addition, we tried to get higher performance of a cross-flow wind turbine by using an Inlet Guide Structure and a Flow Deflector. An Inlet Guide Structure was placed on the edge of a structure and a Flow Deflector was set near a cross-flow wind turbine and can improve ambient wind environments of the wind turbine, the maximum power coefficients were about 15 to 40% higher and the tip speed ratio range showing the high power coefficient was wide and the positive gradients were steep apparently.

关键词： vertical axis wind turbine separated flow performance wind power

BO_(2)-F^(+)Centers in the Radiation-damaged YCOB Crystals

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Chinese Physics Letters 2000年第12期17卷 896-898页

作者： RUAN Yong-Feng Hiroshi nakao Takatomo SASAKI Department of Physics Tianjin UniversityTianjin 300072 Department of Electrical Engineering Osaka UniversityOsaka 565-0871Japan

An intense paramagnetic EPR signal generated from x-ray-irradiated,powdered YCOB crystals was observed at the liquid nitrogen temperature for the first *** peaks,located at the positions where the effective g factor equals to 1.992,1.986,1.980,1.974 and 1.965,labeled as A,B,C,D and E respectively,were *** is believed that the peaks A,B,C and D generated from the BO_(2)-F^(+)center which is a single electron trapped in an oxygen vacancy which was originally occupied by an O^(2-)ion bonded to a(BO3)^(3-)anion *** peak E is thought of coming from Y2+ions that are formed by the Y^(3+) ions trapping *** mechanism for the formation of the radiation-induced defects in the YCOB crystals is suggested.

关键词： Crystal occupied trapping

Effects of Aspect Ratio in a Transonic Shock Tube Airfoil Flow

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Journal of Thermal Science 2012年第5期21卷 435-440页

作者： Masashi KASHITANI Keita MIURA shinichiro nakao Yutaka YAMAGUCHI Department of Aerospace Engineering National Defense Academy1-10-20 Hashirimizu Yokosuka 239-8686 JAPAN Department of Mechanical Engineering Nagasaki Institute of Applied Science 536 Aba-MachiNagasaki 851-0193 JAPAN

In the present study, the flow visualizations were performed around the NACA 0012 models which differ in aspect ratios. We discussed the effects of the aspect ratio in the test models. Additionally the unsteady, two-dimensional, compressible Euler equations were solved for the NACA 0012 airfoil. Experiments were performed utilizing the conventional gas driven shock tube as the intermittent transonic wind tunnel. The aspect ratios of the models are about 0.86 and 1.5, respectively. The Mach numbers M 2 are about 0.84. The Reynolds numbers of the present experimental conditions were constant that Re based on chord length is about 4.0×10 5 . The results are as follows: in different aspect ratios, the difference of the shock wave location is confirmed though the Mach number and Reynolds number are same. It indicates the different correction Mach number by the effects of the side wall boundary layer though the nominal Mach number measured the same value. Also, on the difference of shock wave location for the effects of the aspect ratio, the tend of CFD shows the qualitative agreement with the result of an experiment.

关键词： Shock tube Aerodynamics Transonic flows Aspect ratio Wind tunnel correction

nakao mesenteric approach in pancreatoduodenectomy for pancreatic head cancer

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Journal of Pancreatology 2019年第4期2卷 117-122页

作者： nakao Akimasa Department of surgery Nagoya Central HospitalNagoyaJapan Nagoya Central Hospital NagoyaJapan

The ideal surgery for pancreatic head cancer is isolated pancreatoduodenectomy(PD);that is,en bloc resection using a non-touch isolation *** have been developing isolated PD for pancreatic cancer since 1981,when we developed an antithrombogenic bypass catheter for the portal *** this operation,the first and most important step is the use of a mesenteric approach instead of Kocher’s *** mesenteric approach allows dissection from the non-cancer infiltrating side and determination of cancer-free surgical margins and resectability,followed by systemic lymphadenectomy around the superior mesenteric *** approach enables early ligation of the inferior pancreatoduodenal artery and mesopancreas *** mesopancreas is the second portion of the pancreatic head nerve *** PD is the ideal surgery for pancreatic head cancer from both surgical and oncological *** patients with resectable pancreatic head cancer,isolated PD using the mesenteric approach is suspected to have a higher survival rate than conventional PD using Kocher’s *** precise surgical techniques of the mesenteric approach are herein described.

关键词： Catheter-bypass of the portal vein Inferior pancreatoduodenal artery Isolated pancreatectomy Mesenteric approach Mesopancreas excision Pancreatic cancer Pancreatoduodenectomy

Asymptotics for the Korteweg-de Vries-Burgers Equation

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Acta Mathematica Sinica,English Series 2006年第5期22卷 1441-1456页

作者： nakao HAYASHI Pavel I.NAUMKIN Department of Mathematics Graduate School of ScienceOsaka UniversityOsakaToyonaka560-0043Japan Instituto de Matemáticas UNAM Campus MoreliaAP 61-3(Xangari)Morelia CP 58089MichoacánMexico

We study large time asymptotics of solutions to the Korteweg-de Vries-Burgers equation ut＋uux-uxx＋uxxx=0,x∈R,t〉0. We are interested in the large time asymptotics for the case when the initial data have an arbitrary size. We prove that if the initial data u0 ∈H^s （R）∩L^1 （R）, where s 〉 -1/2, then there exists a unique solution u （t, x） ∈C^∞ （（0,∞）;H^∞ （R）） to the Cauchy problem for the Korteweg-de Vries-Burgers equation, which has asymptotics u（t）=t^-1/2fM（（·）t^-1/2）＋0（t^-1/2） as t →∞, where fM is the self-similar solution for the Burgers equation. Moreover if xu0 （x） ∈ L^1 （R）, then the asymptotics are true u（t）=t^-1/2fM（（·）t^-1/2）＋O（t^-1/2-γ） where γ ∈ （0, 1/2）.

关键词： Korteweg-de Vries-Burgers equation asymptotics for large time large initial data