检索结果-南通市图书馆

Nuclear Science and Techniques 2004年第6期15卷 368-374页

作者： k. komura N.k. AHMED A.H. EL-k.MEL A.M.M. YOUSEF Low Level Radioactivity Laboratory Kanazawa University Wake Tatsunokuchi Ishikawa 923-1224 JapanPhysics Department Faculty of Science South Valley University Kena EgyptPhysics Department Faculty of Science Assiut University Assiut EgyptPhysics Department Faculty of Science South Valley University Kena Egypt

The activation of gold by environmental neutrons through the reaction 197Au (n,γ) 198Au was used to study the effect of concrete buildings on the neutron flux, and to estimate the thermal neutron flux inside and outside these buildings. The results showed that three ceilings of thick.ess 34 g/cm2 decrease the fast neutrons to 26% from its original value. However, the same reinforced concrete decreases the slow neturon flux to only 62% of its original value. The thermal neutron flux at 283 m from the center of Training Reactor of k.nk. University, was twice higher than the environmental neutron back.round.

关键词：金活性混凝土环境中子宇宙射线

Variation of environmental neutron flux with altitude and depth of both water and soil

在线全文

学校读者我要写书评

暂无评论

Nuclear Science and Techniques 2004年第4期15卷 248-256页

作者： k.komura N.k.AHMED A.H.EL-k.MEL A.M.M.YOUSEF Low Level Radioactivity Laboratory Kanazawa UniversityWake TatsunokuchiIshikawa 923-1224JapanPlrysics DepartmentFaculty of Science.South Valley UniversityKenaEgyptPhysics DepartmentFaculty of ScienceAssiut UniversityAssiutEgyptPhysics DepartmentFaculty of Science.South Valley UniversityKenaEgypt

Applying the extreme low-level γ-ray spectroscopic analysis the environmental neutron flux is measured using different moderator construction and environment through the reaction 197Au (n, γ) 198Au. The contribution of thermal and resonance neutrons is separated using the cadmium difference technique, while fast neutrons are measured by the paraffin moderator. The results of altitude dependence of the neutron flux are discussed. The thermal neutron flux near the surface of sea water is less than its value at 100 cm over ground near sea water, while the value over the surfaces of fresh water is higher than that near the surface of sea water. Also the thermal neutron flux at 5 cm soil depth increases, then decreases to its original value at 10 cm depth and still constant until 25 cm, then decreases rapidly to reach 27% of its original value at 60 cm depth. The soil compositions, corresponding neutron temperatures and effective absorption cross sections of earth are the most effective factors on the equilibrium region of thermal neutrons in the ground.

关键词：环境中子流金活化作用 γ射线光谱学环境放射学水土壤

Design of ionic liquids as liquid desiccant for an air conditioning system

在线全文

学校读者我要写书评

暂无评论

Green Energy & Environment 2019年第2期4卷 139-145页

作者： Haruk. Watanabe Tak.ro komura Ryo Matsumoto k.nta Ito Hiroshi Nak.yama Toshik. Nok.mi Toshiyuk. Itoh Department of Chemistry and Biotechnology Graduate School of Engineering Tottori University Chubu Electric Power Company Inc. Research and Development Division Energy Application Research and Development Center Center for Research on Green Sustainable Chemistry Tottori University

Suitable control of the humidity can contribute to electric energy savings. However, the present dehumidification system has many weak.points. The liquid desiccant air-conditioning system has recently gained growing interest from the stand point of reducing energy consumption during dehumidification. In order to find the appropriate ionic liquids(ILs) as a desiccant for the liquid desiccant air-conditioner system, we conducted a systematic evaluation of the humidification capability of 16 types of ILs. Among the tested ILs, tributyl(methyl)phosphonium dimethyl phosphate([P4441][DMPO_4]) exhibited the best dehumidification capacity and had a less corrosive effect on four types of metals as possible piping materials. It should be noted that this [P_(4441)][DMPO_4] has a very stable nature and produced no odor while conducting the experiment and storing for over 1 year at room temperature under ambient conditions. Furthermore, it was revealed that a 77%(w/w) aqueous solution of [P4441][DMPO_4] work.d as an efficient desiccant liquid for the liquid desiccant air-conditioner system.

关键词： Dehumidification Liquid desiccant Ionic liquids Air-conditioner system Phosphonium ILs

A Novel Friedel-Crafts Acylation Reaction of Anisole for Production of 4-Methoxyacetophenone with High Selectivity and Sufficient Reusability of Mordenite Zeolite Catalyst

在线全文

学校读者我要写书评

暂无评论

Green and Sustainable Chemistry 2017年第3期7卷 185-192页

作者： Mak.to Mak.hara k.nichi komura Department of Materials Science and Technology Faculty of Engineering Gifu University Gifu Japan

Zeolite catalyzed Friedel-Crafts reactions were examined using acetic anhydride as an acetylating agent and an acetic acid as a solvent. It revealed that the reaction of anisole smoothly occurred quantitatively for 3 h using mordenite zeolite with SiO2/Al2O3 = 200, and with SiO2/Al2O3 = 110, the increasing of Br?nsted acidity allowed to completely react within 2 h. Furthermore the selectivity of 4-methoxyacetophenone (4-MA) among the isomers was found to be quantitative, no by-products and/or isomers were not detectable. With the excellent recyclability and reusability, the mordenite zeolite exhibited at least 30 times quantitatively both conversion of anisole and selectivity of 4-MA. The mordenite catalysts of fresh and the used after 30 times were characterized. This opportunity obviously indicates the sufficient shape selective catalyst of mordenite zeolite and gives a green synthetic tool for heterogeneous acylation reaction.

关键词： Zeolite Friedel-Crafts Acylation Mordenite Shape Selectivity

ELECTRON MICROSCOPE STUDY ON EPITAXIAL THIN FILMS,GaAs/AIAs AND MgAl2O4/Si

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

ELECTRON MICROSCOPE STUDY ON EPITAXIAL THIN FILMS,GaAs/AIAs ...

Three-dimensional structure of the Golgi apparatus: A lectin cytochemical study on goblet cells of the mouse distal colon

The Fourth Chinese-Japanese Electron Microscopy Seminar

作者： Yuk.tomo komura k.uichi k.fune Department of Materials Science Faculty of ScienceHiroshima UniversityNaka-kuHiroshima 730Japan

*** In recent years a technique of mak.ng epitaxial thin films of semi-conducting materials is rapidly developed in the field of electronic *** that the charac- terization of materials has become very *** direct observations of the structure for GaAs/AIAs super- lattice and MgAlO/Si thin films have been made by using transmission electron microscopy(TEM)and electron dif- fraction(ED)method together with X-ray diffraction(XD) method.

关键词：

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Three-dimensional structure of the Golgi apparatus: A lectin...

Zoledronic acid combined with androgendeprivation therapy may prolong time to castration-resistant prostate cancer in hormone-naı¨ve metastatic prostate cancer patients e A propensity scoring approach

Third Congress of the Asian-Pacific Organization for Cell Biology

作者： k.tsuk. k.taok. Etsuk. Suzak. k.zuhide komura Dept. Anat. Hiroshima Univ. Sch. Med.2-3 Kasumi-1-chomeMinami-kuHiroshima-shiHiroshima 734-8551Japan

The Icctins used in this study were HAA, HPA, MPA, SBA and UEAⅠ (binding α -GalNAc;α -GalNAc;α -GalNAc and α -Gal;α,β -GalNAc;and α -Fuc, respectively). An electron microscope examination demonstrated that the former four lectins conjugated with colloidal gold, labeled ax-side stack. of the Golgi apparatus of goblet cells intensely and those of

关键词：

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Asian Journal of Urology 2016年第1期3卷 33-38页

作者： k.zuhiro Nagao Hideyasu Matsuyama Masahiro Nozawa Isao Hara Tsuk.sa Nishiok. Tak.hiro komura Atsunobu Esa Shigeya Uejima Masaak. Imanishi Yasunari Uek.do Tak.toshi Ogawa Hiroshi k.jik.wa Hirotsugu Uemura Department of Urology Graduate School of MedicineYamaguchi UniversityJapan Department of Urology Kinki University Faculty of MedicineJapan Department of Urology Wakayama Medical University School of MedicineJapan Department of Urology Sakai HospitalKinki University Faculty of MedicineJapan Department of Urology Naga HospitalJapan Department of Urology NTT Osaka HospitalJapan Department of Urology National Hospital Organization Osaka Minami Medical CenterJapan Department of Urology Nara Hospital Kinki University Faculty of MedicineJapan Department of Urology Tondabayashi HospitalJapan Department of Urology Wakayama Rosai HospitalJapan Department of Urology Kainan Municipal HospitalJapan Department of Urology Izumiotsu Municipal HospitalJapan

Objective:To clarify the oncological benefit of zoledronic acid for hormone-naive metastatic prostate cancer,patient outcome of androgen deprivation therapy with zoledronic acid(ADT+Z)and androgen deprivation therapy alone(ADT)was ***:Fifty-two patients with pathologically confirmed metastatic prostate cancer were prospectively enrolled and treated with combined androgen block.de(goserelin and bicalutamide)with zoledronic acid(4 mg every 4 week. for 24 months).A propensity score-match with logistic regression analysis was applied to select 50 pair-matched cohorts(both from ADT+Z and from historical control cohorts who had undergone ADT alone),and patient outcomes were ***:Patients with ADT+Z had significantly longer time to progression(TTP)than those with ADT(median TTP;24.2 vs.14.0 months,p=0.0092),while no significant difference of overall survival between two groups(p=0.1502).Multivariate analysis for biochemical recurrence revealed treatment with ADT was the sole independent prognostic factor(HR:1.724,95%CI:1.06-2.86,p=0.0297).Conclusion:Combination of zoledronic acid with ADT may prolong time to castration resistant prostate cancer.

关键词： Zoledronic acid Hormone-naive prostate cancer Biochemical recurrence Propensity scorematch analysis

火花辅助点火均质充气压缩着火的瞬态控制技术

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

汽车与新动力 2016年第4期48卷 28-33页

作者： M.Tak.zawa k.komura T.k.tamura 武涛

近几年,随着人们对减少CO2和其他温室气体排放的技术需求逐渐增加,汽油均质充气压缩着火(HCCI)燃烧方式已获得认可,该技术依靠稀薄燃烧实现低氮氧化物排放和高热效率。然而,汽油机HCCI对缸内温度变化的耐受度很低,因此,在瞬态工况下运... 详细信息

近几年,随着人们对减少CO2和其他温室气体排放的技术需求逐渐增加,汽油均质充气压缩着火(HCCI)燃烧方式已获得认可,该技术依靠稀薄燃烧实现低氮氧化物排放和高热效率。然而,汽油机HCCI对缸内温度变化的耐受度很低,因此,在瞬态工况下运行时易发生爆燃和失火。用1台四冲程自然吸气汽油直喷发动机验证了HCCI的瞬态控制,该发动采用可变气门正时和升程的电子控制系统,来优化HCCI的进排气。介绍了引入外部废气再循环的化学计量火花点燃与HCCI着火的切换控制,以及在HCCI运行范围内发动机负荷和转速的变化。

关键词：均质充气压缩着火火花点火辅助瞬态控制废气再循环

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

缩窄段的河床变形

水道港口 1981年第Z1期 54-58页

作者： Saburo komura 袁美琦

本文提出了缩窄段中均匀河床质的冲刷平衡深度的予报方法。应用动力和静力平衡原理,并假定河床形态在缩窄管和未缩窄河段在平衡状态下两者仍保持相同,但河床组成物可以不同,以此导得予报冲刷平衡水深的关系式。在冲刷平衡深度的予报中,... 详细信息

本文提出了缩窄段中均匀河床质的冲刷平衡深度的予报方法。应用动力和静力平衡原理,并假定河床形态在缩窄管和未缩窄河段在平衡状态下两者仍保持相同,但河床组成物可以不同,以此导得予报冲刷平衡水深的关系式。在冲刷平衡深度的予报中,已考虑了不均匀河床质粗化的影响。

关键词：窄河段平衡状态不均匀组成物缩窄代入方程式方程河床形态河道形态防护层床沙质泥沙泥沙输移常数数学

Pd/Hβ双功能催化剂上苯加氢烷基化合成环己基苯

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

催化学报 2007年第3期28卷 246-250页

作者：邱俊小村贞一窐田好浩杉義弘吉林化工学院化学与制药工程学院吉林吉林132022 岐阜大学大学院工学研究科机能材料工学科

采用浸渍法制备了Pd/Hβ双功能催化剂,并用其催化苯加氢烷基化反应合成环己基苯,考察了反应温度、反应时间、氢气压力、载体的酸性和催化剂的金属担载量对反应的影响.结果表明,在2.5MPaH2、200℃和3h的条件下,苯的转化率为24.3%,环己基... 详细信息

采用浸渍法制备了Pd/Hβ双功能催化剂,并用其催化苯加氢烷基化反应合成环己基苯,考察了反应温度、反应时间、氢气压力、载体的酸性和催化剂的金属担载量对反应的影响.结果表明,在2.5MPaH2、200℃和3h的条件下,苯的转化率为24.3%,环己基苯的选择性为88.0%.金属活性位与酸性位之间的平衡是苯加氢烷基化反应的关键.同时,探讨了苯的加氢烷基化反应机理.

关键词：钯 Hβ分子筛双功能催化剂苯加氢烷基化反应环己基苯