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Spectroscopic Measurement of Shock Waves in an Arcjet Plasma Expanding Through a Conical Nozzle

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Plasma Science and Technology 2013年第2期15卷 89-92页

作者： k.kOZUE G.kUMAkAWA S.NAMBA T.ENDO k.TAkIYAMA k.sato N.TAMURA Graduate school of Engineering Hiroshima University1-4-1 KagamiyamaHigashi-HiroshimaHiroshima 739-8527Japan National Institute for Fusion Science 322-6 Oroshi-cyo TokiGifu 509-5292Japan

A diamond-shaped shock wave was created in a helium arcjet plasma. Visi- ble/ultraviolet emission spectroscopy was used to investigate the condition for the formation of stable shocks and to determine characteristics of the plasma. Dependence of the position of the shock front on the gas pressure in the expansion region was investigated. It was found that the shock wave arises from the collision of plasma particles and residual neutral atoms in that region. Continuum and line spectra of neutral helium were measured, from which the electron temper- atures were derived. The electron density was deduced from the Inglis-Teller limit of the He I 2p3p-3d3D series. The temperature and density were found to have almost constant values of 0.2 eV and 8.5x 1013 cm-3, respectively, across the shock front.

关键词： arcjet plasma shock wave plasma spectroscopy atomic and molecular pro-cesses

Factors hindering the degradation of pharmaceuticals from human urine in an iron-activated persulfate system

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Journal of Environmental Sciences 2024年第1期135卷 130-148页

作者： Yiruiwen Xie Dao Guan Yangfan Deng Yugo sato Yu Luo Guanghao Chen Department of Civil and Environmental Engineering Water Technology LabHong Kong Branch of Chinese National Engineering Research Center for Control&Treatment of Heavy Metal PollutionThe Hong Kong University of Science&TechnologyHong Kong 999077China

This study investigated the degradation of clofibric acid(CFA),bezafibrate(BZF),and sulfamethoxazole(SMX)in synthetic human urine using a novel mesoporous iron powderactivated persulfate system(mFe-PS system),and identified the factors limiting their degradation in synthetic human urine.A kinetic model was established to expose the radical production in various reaction conditions,and experiments were conducted to verify the modeling *** the phosphate-containing mFe-PS system,the 120 min removal efficiency of CFA decreased from 95.1%to 76.6%as the phosphate concentration increased from 0.32 to 6.45 mmol/L,but recovered to 90.5%when phosphate concentration increased to 16.10 mmol/***,the increased concentration of phosphate from 0.32 to 16.10mmol/L reduced the BZF degradation efficacy from 91.5%to 79.0%,whereas SMX removal improved from 37.3%to 62.9%.The m Fe-PS system containing(bi)carbonate,from 4.20 to166.70 mmol/L,reduced CFA and BZF removal efficiencies from 100%to 76.8%and 80.4%,respectively,and SMX from 83.5%to 56.7%within a 120-min reaction *** addition,alkaline conditions(pH≥8.0)inhibited CFA and BZF degradations,while nonacidic pH(pH≥7.0)remarkably inhibited SMX *** of the kinetic model indicated the formation of phosphate(H_(2)PO_(4)^(·)/HPO_(4)^(·-))and/or carbonate radicals(CO_(3)^(·-))could limit pharmaceutical *** transformation products(TPs)of the pharmaceuticals revealed more incompletely oxidized TPs occurred in the phosphate-and(bi)carbonate-containing m Fe-PS systems,and indicated that H_(2)PO_(4)^(·)/HPO_(4)^(·-)mainly degraded pharmaceuticals via a benzene ring-opening reaction while CO_(3)^(·-)preferentially oxidized pharmaceuticals via a hydroxylation reaction.

关键词： Pharmaceutical degradation Human urine Iron-activated persulfate system Phosphate radicals Carbonate radicals Transformation products

New aspects of a small GTPase RAB35 in brain development and function

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Neural Regeneration Research 2025年第7期20卷 1971-1980页

作者： Ikuko Maejima ken sato Laboratory of Molecular Traffic Institute for Molecular and Cellular RegulationGunma UniversityMaebashiJapan

In eukaryotic cells,organelles in the secretory,lysosomal,and endocytic pathways actively exchange biological materials with each other through intracellular membrane trafficking,which is the process of transporting the cargo of proteins,lipids,and other molecules to appropriate compartments via transport vesicles or *** processes are strictly regulated by various small GTPases such as the RAS-like in rat brain(RAB)protein family,which is the largest subfamily of the RAS *** of membrane trafficking affects tissue homeostasis and leads to a wide range of diseases,including neurological disorders and neurodegenerative ***,it is important to understand the physiological and pathological roles of RAB proteins in brain ***35,a member of the RAB family,is an evolutionarily conserved protein in metazoans.A wide range of studies using cultured mammalian cells and model organisms have revealed that RAB35 mediates various processes such as cytokinesis,endocytic recycling,actin bundling,and cell ***35 is also involved in neurite outgrowth and turnover of synaptic *** generated brain-specific Rab35 knockout mice to study the physiological roles of RAB35 in brain development and *** mice exhibited defects in anxiety-related behaviors and spatial ***,RAB35 is required for the precise positioning of pyramidal neurons during hippocampal development,and thereby for normal hippocampal *** contrast,layer formation in the cerebral cortex occurred superficially,even in the absence of RAB35,suggesting a predominant role for RAB35 in hippocampal development rather than in cerebral cortex *** studies have suggested an association between RAB35 and neurodegenerative diseases,including Parkinson's disease and Alzheimer's *** this review,we provide an overview of the current understanding of subcellular functions of *** also provide insights into the phys

关键词： endocytosis endosomes hippocampal development neurodegenerative diseases RAB35

High resolution electron energy loss spectroscopy study of the oxidation of Nb(110) surface

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Chinese Science Bulletin 1997年第5期42卷 384-387页

作者： Wang, YS Wei, XM Tian, ZJ Zhai, RS Ushikubo, T sato, k Zhuang, SX State key Laboratory of Catalysis Dalian Institute of Chemical Physics Chinese Academy of Sciences China Mitsubishi Chemical Corporation Japan Department of Chemical Physics University of Science and Technology of China Hefei China

NIOBIUM and its oxides are a new kind of materials applied in technical fields, such as catalysis, microelectronics, ceramics and optical glass. In order to understand the surface structure and catalytic activity, much work has been done on the oxidation of niobium. These results indicated that the oxidation process of niobium surface, the distribution and the structure of niobium oxides on the surface are all closely related to the condition of the oxidation process. Due to the high activity of niobium and the complexity of niobium oxide species, up to now there has not been a clear picture of the structure and the forming condition of the niobium oxides. HREELS is a powerful tool to investigate vibrational and structural properties of surface, but the HREELS study of the oxidation of Nb single crystal by O2 has never been reported before. In this note we investigated the oxidation of Nb（110） and the structure and adsorption properties of the oxide film using HREELS, UPS and AES.

关键词： oxygen adsorption Nb (110) surface niobium oxide films high resolution electron energy loss speetroscopy (HREELS).

A HREELS study of the adsorption of formic acid on slightly oxidized Nb(110) surface

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Science China Chemistry 1997年第1期40卷 9-14页

作者：汪寅生魏绪明田志坚翟润生 T.Ushikubo k.sato 庄叔贤 State key Laboratory of Catalysis Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023China Mitsubishi Chemrcal Corporation Japan Department of Chemical Physics University of Science and Technology of ChinaHefei 230026China

An investigation has been made on the adsorption and decomposition of formic acid on slightly oxidized Nb(110) surface (0/Nb atom ratio = 0.2) using high resolution electron energy loss spectroscopy (HREELS),and a corresponding surface reaction mode is *** 140 k,formic acid of low exposure on such an Nb(110) surface decomposed to formate,which bonded on Nb in monodentate configuration,simultaneously some formate decomposed to CO,which adsorbed on the *** acid multilayers formed when the exposure was *** the temperature was increased to above 190 k,multilayer formic acid desorbed,and the surface was covered with mon-odentate-bonded formate and *** the temperature range of 250-300 k,chemisorbed formate changed from monodentate configuration into bridging configuration and CO molecules *** decomposition of formate at higher temperatures led to the oxidation of *** formate formed in the high exposure case was so stable that it did not decompose even the temperature

关键词： adsorption of formic acid Nb{110} surface HREELS

腹腔镜左半结肠癌体外结肠—结肠三角吻合与功能性端—端吻合的短期疗效评估:一项倾向性评分匹配分析

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结直肠肛门外科 2022年第2期28卷 179-180页

作者：马斌 sato k IMAIZUMI k kASAJIMA H 辽宁省肿瘤医院结直肠外科辽宁沈阳110042 不详

目的:目前为止,尚未见有研究报道比较结肠—结肠体外三角吻合术(TA)和功能性端—端吻合术(FEEA)的短期疗效,尤其是在腹腔镜左半结肠癌手术中。因此,本研究旨在通过倾向性评分匹配分析的方法比较这两种吻合术的短期疗效。方法:回顾性分析... 详细信息

目的:目前为止,尚未见有研究报道比较结肠—结肠体外三角吻合术(TA)和功能性端—端吻合术(FEEA)的短期疗效,尤其是在腹腔镜左半结肠癌手术中。因此,本研究旨在通过倾向性评分匹配分析的方法比较这两种吻合术的短期疗效。方法:回顾性分析2009年5月至2021年3月期间129例接受腹腔镜结肠—结肠体外TA (n=75)或FEEA (n=54)的Ⅰ~Ⅳ期左半结肠癌患者的临床资料。

关键词：左半结肠癌短期疗效倾向性评分匹配疗效评估三角吻合腹腔镜吻合术临床资料

Wild Gibbon Optimization Algorithm

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Computers, Materials & Continua 2024年第7期80卷 1203-1233页

作者： Jia Guo JinWang ke Yan Qiankun Zuo Ruiheng Li Zhou He Dong Wang Yuji sato Hubei key Laboratory of Digital Finance Innovation Hubei University of EconomicsWuhan430205China School of Information Engineering Hubei University of EconomicsWuhan430205China China Construction Third Engineering Bureau Installation Engineering Co. Ltd.Wuhan430074China Hubei Internet Finance Information Engineering Technology Research Center Hubei University of EconomicsWuhan430205China College of Informatics Huazhong Agricultural UniversityWuhan430070China Faculty of Computer and Information Sciences Hosei UniversityTokyo184-8584Japan

Complex optimization problems hold broad significance across numerous fields and ***,as the dimensionality of such problems increases,issues like the curse of dimensionality and local optima trapping also *** address these challenges,this paper proposes a novel Wild Gibbon Optimization Algorithm(WGOA)based on an analysis of wild gibbon population *** two strategies:community search and community *** community search strategy facilitates information exchange between two gibbon families,generating multiple candidate solutions to enhance algorithm ***,the community competition strategy reselects leaders for the population after each iteration,thus enhancing algorithm *** assess the algorithm’s performance,CEC2017 and CEC2022 are chosen as test *** the CEC2017 test suite,WGOA secures first place in 10 *** the CEC2022 benchmark functions,WGOA obtained the first rank in 5 *** ultimate experimental findings demonstrate that theWildGibbonOptimization Algorithm outperforms others in tested *** underscores the strong robustness and stability of the gibbonalgorithm in tackling complex single-objective optimization problems.

关键词： Complex optimization wild gibbon optimization algorithm community search community competition

用正电子湮灭技术探究Ce-基大块非晶合金的局域原子结构和晶化行为

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用正电子湮灭技术探究Ce-基大块非晶合金的局域原子结构和晶化行为

Trace element geochemistry and Sr-Nd characteristics of Mesoproterozoic mafic intrusive rocks from Rondonia, Brazil, SW Amazonian Craton： Petrogenetic and tectonic inferences

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作者：赵勇张博 sato k. 合肥工业大学材料科学与工程学院非晶态物质科学研究所东京学芸大学环境科学系

Ce-基大块非晶合金具有低玻璃化转变温度(T)、优异的玻璃形成能力、良好的塑性精密成型能力、强的过冷液体行为及高压下非晶多形态现象等特性。但目前对其原子结构几乎一无所知,严重限制了人们对于Ce-基非晶合金优异性能的进一步理解。...

Ce-基大块非晶合金具有低玻璃化转变温度(T)、优异的玻璃形成能力、良好的塑性精密成型能力、强的过冷液体行为及高压下非晶多形态现象等特性。但目前对其原子结构几乎一无所知,严重限制了人们对于Ce-基非晶合金优异性能的进一步理解。以Ce-Al-Cu,Ce-Al-Cu-Nb,Ce-Ga-Cu及Ce-Ga-Cu-Ni系大块非晶合金为研究对象,通过正电子湮灭能谱、等温长度膨胀仪、第一性原理计算等技术手段来表征Ce-基非晶合金的原子排列结构和反常的晶化行为。并发现Ce-Ga-Cu系非晶合金中异常的局域原子排列结构有别于其它系列的非晶合金:Ce-Ga-Cu非晶合金中发现两种不同的湮灭时间,分别对应着两种非晶态局域结构:以Ce原子为中心的密排和松散结构。其中前者的排列密度甚至高于面心立方的晶体Ce单质的堆积密度。分析发现这种异常的密堆积结构是Ga元素化学势激发Ce原子4f电子发生的去局域化效应所导致的。非晶合金是通过快速冷却其熔体避免形核结晶而制备出来的,在快速冷却过程中熔体中的自由体积来不及发生湮灭而保留在非晶合金中,从而使得非晶合金密度要小于同成分的晶体材料。换句话说,非晶合金晶化时其体积通常会发生收缩。而通过等温长度膨胀仪测量Ce-Ga-Cu大块非晶合金晶化过程中长度的变化,惊奇地发现其在晶化时长度表现出反常的膨胀,这种行为明显异于一般的非晶体系。正电子湮灭能谱测量结果发现晶化后晶体的结构十分松散,且上文中所提到的Ce-Ga-Cu非晶合金中异常的密度局域结构消失。正电子湮灭技术能够有效地探究金属玻璃的局域原子结构,得到的结构信息对理解玻璃化转变过程、提高玻璃形成能力、理解非晶多形态现象具有重要意义。

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Episodes 2008年第4期31卷 392-400页

作者： Girardi, V.A. V. Teixeira, W. Bettencourt, J.S. Andrade, S. Navarro, M.S. sato, k. Instituto de Geociencias Universidade de Sao Paulo Rua do Lago 562. CEP 05508-080 Cidade Universitada S. Paulo Brazil

The Amazonian Craton comprises an Archean domain surrounded by four successively younger Proterozoic tectonic provinces. Within the Rio-Negro-Juruena province the Serra da Providência Intrusive Suite (1.60 and 1.53 Ga) consists of A-type rapakivi granites, charnockites and mangerites genetically associated with diabase dikes, gabbros and amphibolites. The original mafic melts were derived from a depleted mantle source (εNd(T) +2.5 to +2.8; εSr(T) -12.1). Underplated mafic magma induced melting of a short-lived felsic crust, thus originating coeval felsic-mafic magmatism in a continental intraplate setting. The Colorado Complex, assigned to the Rondonian-San Ignacio province, comprises 1.35-1.36 Ga intrusive bimodal magmatism represented by monzonite gneisses associated with amphibolite, gabbro and metadiabase dikes intercalated with metasediments with detrital zircon that yield U-Pb ages of 1.35 to 1.42 Ga. Mafic samples display juvenile signatures (εNd(T) 0.0 to +5.2; εSr(T) -5.0 to -30.7) and are less contaminated than the Serra da Previdência and Nova Brasilândia ones. The generation of the basaltic magma is related to the subduction of an oceanic slab below the peridotite wedge (intraoceanic arc setting). Fluids and/or small melts from the slab impregnated the mantle. The Nova Brasilândia Sequence (Sunsas-Aguapeí province) comprises a metasedimentary sequence intruded by 1.10-1.02 Ga metadiabases, gabbros, meta-gabbros, and amphibolites associated with granitic plutons (bimodal magmatism). The original tholeiitic magmas, derived from a depleted source (εNd(T) = +3.1 to +5.0), in a proto-oceanic setting, underwent subsequent contamination by the host rocks, as indicated by the isotopic and trace element data.

关键词：亚马逊河流域巴西 Sr-Nd特性地球化学