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双波长近红外拉曼光谱仪及在腐蚀产物分析中的应用

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光谱学与光谱分析 2024年第3期44卷 756-761页

作者：王茂成李赣程浩姜维陈广李海波中国工程物理研究院材料研究所表面物理化学重点实验室四川绵阳621908 中国工程物理研究院材料研究所四川绵阳621907

在拉曼光谱测试中某些物质存在荧光发射背景,由于荧光强度一般比拉曼散射强度高几个数量级,在荧光干扰时几乎无法获得有效的拉曼光谱信号。为抑制荧光背景,可选用近红外波段激光作为激发光源,而硅基探测器在1 000 nm以上波段时光量子效... 详细信息

在拉曼光谱测试中某些物质存在荧光发射背景,由于荧光强度一般比拉曼散射强度高几个数量级,在荧光干扰时几乎无法获得有效的拉曼光谱信号。为抑制荧光背景,可选用近红外波段激光作为激发光源,而硅基探测器在1 000 nm以上波段时光量子效率严重下降,导致近红外拉曼光谱仪器难以探测3 000 cm^(-1)以上的波段,存在荧光抑制效果与检测范围无法兼顾的问题。由于高波数的拉曼特征峰是识别材料种类和解析材料结构的重要依据,如氨基的N—H伸缩振动峰在3 300 cm^(-1)附近、 OH-伸缩振动峰在3 650 cm^(-1),这些基团是分析材料腐蚀产物、水合物、有机物等的重要依据。因此,迫切需要开发一种解决拉曼光谱仪器无法兼顾荧光抑制效果和检测光谱范围问题的方法。该工作提出一种采用光谱仪固定检测波段、 730和830 nm双波长激光“接力”激发的方案(即830 nm激发低波数拉曼、 730 nm激发高波数拉曼)。通过双激光波长“接力”激发、固定检测波段的新设计,可有效拓宽检测范围至200~3 700 cm^(-1),并且不会降低光谱分辨率(达到6 cm^(-1)),与此同时整机光路无机械可动部件,可靠性高便于实现便携式设计。通过样机进行测试,证明该技术方案具备高灵敏度、较好荧光抑制效果、宽检测范围和较高光谱分辨率等优势。通过研制的双波长近红外拉曼光谱仪获得了铀腐蚀产物、有机涂层下的lih潮解产物的清晰拉曼信号,解决了特种材料无损检测的技术难题。该技术也适用于其他研究及检测领域,特别是拉曼散射截面小、荧光背景高的物质检测。由于双波长近红外拉曼光谱仪可覆盖200~3 700 cm^(-1)检测范围,为多数水合物、含羟基及氨基官能团物质的拉曼检测提供了一种可行的技术途径。

关键词：荧光抑制高波数无损检测便携式拉曼光谱仪双波长激发

Enabling Extraordinary Rate Performance for Poorly Conductive Oxide Pseudocapacitors

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Energy & Environmental Materials 2020年第3期3卷 405-413页

作者： Mozaffar Abdollahifar Hao-Wen Liu Chia-Hsin Lin Yu-Ting Weng Hwo-Shuenn Sheu Jyh-Fu Lee Meng-Lin Lu Yen-Fa Liao Nae-lih Wu Department of Chemical Engineering National Taiwan UniversityTaipei 106Taiwan National Synchrotron Radiation Research Center Hsinchu 30076Taiwan Taiwan Beamline Office at SPring-8 1-1-1 KoutoMikazukiSayoHyogo 679-5198Japan Advanced Research Center for Green Materials Science and Technology National Taiwan UniversityTaipei 10617Taiwan

Pseudocapacitive transition metal oxides(PTMOs)have the advantages of high areal capacitance and material density suitable for high-energy supercapacitor devices,but they are typically marred by insufficient rate performance,which in turn deteriorates cyclic stability at high current *** the example of spinel manganese oxide,herein we demonstrate that a pseudocapacitive oxide electrode of remarkable rate performance and cyclic stability may be realized by adopting oxide nanocrystallites,which are derived based on a novel solution chemistry,and carbon additive(CA)nanoparticles with highly uniform of size *** controlling the particle morphology and size distribution of the active material and conductive additive(CA)in the nanometer range can maximize the density of active material-CA-electrolyte three-phase contact points,thus facilitating synchronized electron and cation flow for the completion of surface faradaic *** resultant Mn3O4 pseudocapacitive electrode exhibits rate capability and cycle stability,including 60%capacity retention at 60 A g-1 and no capacity fade over 100000 cycles under dynamic current densities,far superior to the state-of-the-art PTMO *** electrode design strategy is in general applicable to pseudocapacitors containing poorly conductive active materials.

关键词： high-rate performance pseudocapacitor electrodes single nanoparticles three-phase contact point ultra-long cycle life

马华文学与马来文学的跨族对话：从国族寓言的角度探讨

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杭州师范大学学报（社会科学版） 2015年第6期37卷 56-64页

作者： [马来西亚]黄丽丽复旦大学中文系上海200433 拉曼大学中华研究院马来西亚吉隆坡

马来西亚的华文文学以及马来文学是同一国家属性但不同语种的文学系统。它们之间不仅跨民族跨语言,而且有各自特殊的文化历史背景。从国族寓言切入,探讨马华文学与马来文学两个系统之间的跨文化对话,有助于考察双方文本如何结构多元背... 详细信息

马来西亚的华文文学以及马来文学是同一国家属性但不同语种的文学系统。它们之间不仅跨民族跨语言,而且有各自特殊的文化历史背景。从国族寓言切入,探讨马华文学与马来文学两个系统之间的跨文化对话,有助于考察双方文本如何结构多元背景的族群关系、文化属性以及其间的张力。

关键词：国族寓言对话马华文学马来文学

Stable Adaptive Fuzzy Control with Hysteresis Observer for Three-Axis Micro/Nano Motion Stages

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intelligent Control and Automation 2012年第4期3卷 390-403页

作者： lih-Chang Lin Bor-Yih Chang Biing-Der Liaw Department of Mechanical Engineering National Chung Hsing University Taichung Chinese Taipei

This paper considers the analytical dynamics with simplified Dahl hysteresis model for a three-axis piezoactuated micro/nano flexure stage. An adaptive controller with nonlinear dynamic hysteresis observer is proposed using Lyapunov stability theory. in the controller, a fuzzy function approximator with parameters update law is included to compensate for the identification inaccuracy, model uncertainty, and flexure coupling effects. Simulation results are used to demonstrate the control performance.

关键词： Micro/Nano Stage Adaptive Fuzzy Control Hysteresis Observer Fuzzy Function Approximator

Radical Scavenging and Anti-hyperglycemic Activities from the Leaves of Ardisia cornudentata *** ***

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Radical Scavenging and Anti-hyperglycemic Activities from th...

第十四届全国中药和天然药物学术研讨会

作者： lih-Geeng Chen Ying-Xuan Li National Chiayi University

Ardisia cornudentata *** ***(Hayata)Yang(Myrsinaceae)is a small shrub endemic to Taiwan and distributed at low-altitudes mountains from 500 to2,000m in the north and south of the *** whole plant has been used in folk medicine to eliminate blood stasis,disperse swelling,improve blood circulation,and also as an analgesic.

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Enhancement of insulin-producing cell differentiation from embryonic stem cells using pax4-nucleofection method

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World Journal of Gastroenterology 2007年第11期13卷 1672-1679页

作者： Han-Tso Lin Chung-Lan Kao Kun-Hsiung Lee Yuh-lih Chang Shih-Hwa Chiou Fu-Ting Tsai Tung-Hu Tsai Dey-Chyi Sheu Larry LT Ho Hung-Hai Ku Department of Medical Research and Education Taipei Veterans General Hospital Department of Physical Medicine and Rehabilitation Taipei Veterans General Hospital and National Yang-Ming University Animal Technology institute Taiwan Chunan Miaoli Department of Pharmacy Taipei Veterans General Hospital and National Yang-Ming University Department of Medical Research and Education Taipei Veterans General Hospital and Institute of Clinical Medicine National Yang-Ming University Department of Medical Research and Education Taipei Veterans General Hospital and Department of Bioengineering Tatung University institute of Traditional Medicine National Yang-Ming University and Department of Education and Research Taipei City Hospital Department of Bioengineering Tatung University Division of Endocrinology and Metabolism Department of Internal Medicine Taipei Veterans General Hospital Taipei institute of Anatomy and Cell Biology National Yang-Ming University and Department of Education and Research Taipei City Hospital

AiM： To enhance the differentiation of insulin producing cell （iPC） ability from embryonic stem （ES） cells in vitro. METHODS： Four-day embryoid body （EB）-formatted ES cells were dissociated as single cells for the followed plasmid DNA delivery. The use of NucleofectorTM electroporator （Amaxa biosystems, Germany） in combination with medium-contained G418 provided a high efficiency of gene delivery for advanced selection. Neucleofected cells were plated on the top of fibronectincoated Petri dishes. Addition of Ly294002 and raised the glucose in medium at 24 h before *** differentiation status of these cells was monitored by semi-quantitative PCR （SQ-PCR） detection of the expression of relative genes, such as oct-4, sox-17, foxa2, mixll, pdx-1, insulin 1, glucagons and somatostatin. The percentage of iPC population on d 18 of the experiment was investigated by immunohistochemistry （iHC）, and the content/secretion of insulin was estimated by ELiSA assay. The mice with severe combined immunodeficiency disease （SCiD） pretreated with streptozotocin （STZ） were used to eliminate plasma glucose restoration after pax4^＋ ES implantation. RESULTS： A high efficiency of gene delivery was demonstrated when neucleofection was used in the present study; approximately 70% cells showed DsRed expression 2 d after neucleofection. By selection of medium-contained G418, the percentage of DsRed expressing cells kept high till the end of study. The pancreatic differentiation seemed to be accelerated by pax4 nucleofection. When compared to the group of cells with mock control, foxa2, mixll, pdxl, higher insulin and somatostatin levels were detected by SQ-PCR 4 d after nucleofection in the group of pax4 expressing plasmid delivery. Approximately 55% of neucleofected cells showed insulin expression 18 d after neucleofection, and only 18% of cells showed insulin expression in mock control. The disturbance was shown by nucleofected pax4 RNAi vector; only 8% of cells expressed insulin

关键词： Diabetes mellitus Nucleofection pax4 Embryonic stem cells insulin producing cells

Gating Mechanisms of Ca2+ release activated Ca2+(CRAC) channels

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Gating Mechanisms of Ca2+ release activated Ca2+(CRAC) chann...

第九届全国钙信号和细胞功能研讨会

作者： lih Kuo Shenyuan L.Zhang Department of Systems Biology and Translational Medicine Texas A&M Health Science CenterTemple TXUSA

Ca release activated Ca(CRAC)channel mediated Ca entry is indispensible for T cell activation and normal functions of other immune *** discovery of CRAC channel’s pore forming subunit-Orail,and activation subunit-STiMl,facilitates the further understanding of its role in skeletal muscle contraction,cardiovascular diseases, and ***,its gating mechanism,how Orail tetramers conduct Ca entry upon STiM l interaction,remains ***,we show that:1)an exogenous peptide mimicking the Orail C-terminus fully inhibits CRAC channel activity;and C-terminal

关键词： Cell = HEK Method = electrophysiology Topic = gating mechanism

M-C simulation of shielding effects of PE,lih and graphite fibers under 1 MeV electrons and 20 MeV protons

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Nuclear Science and Techniques 2008年第6期19卷 329-332页

作者： YUE Kun LUO Wenyun ZHA Yuanzi DONG Xiaoqing wang Chuanshan Shanghai Applied Radiation institute Shanghai University Shanghai 201800 China Xin Hua Hospital Affiliated to School of Medicine of Shanghai Jiao Tong University Shanghai 200092 China

Shielding effects of different materials under 1 MeV electron and 20 MeV proton beams were simulated with Geant4 code. it was found that shielding effects of polyethylene and graphite fibers are much better than aluminum. Energy depositions in the phantom shielded by the materials are calculated, with the least energy deposition by graphite fiber shielding. The results show that graphite fibers are good radiation shielding material in space programs.

关键词：蒙特卡罗法辐射屏蔽防护材料辐射防护

Spiritual Exercises Hybridized Approaches to Nurture Sensitivities and Ferment Creativities

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Spiritual Exercises Hybridized Approaches to Nurture Sensiti...

实践大学设计学院 2009 Design++国际设计研讨会

作者： Ta-lih Shieh Winston (Wen-Che) Yang institute of Fashion and Communications Design Shih Chien University Department of Communications Design Shih Chien University

Created in 1997, Shih Chien University’s School of Design has established itself as a unique environment of learning in Taiwan. This paper will review its pedagogy, by discussing the decade long experiment at the freshmen foundation studio in its Department of Communications Design. The core course is conceived on the belief that values of design and aesthetics created in the West cannot be directly transplanted into the context of Taiwan. instead, a framework of open dialogue is created to allow multiple sets of values to co-exist. Students are pushed to the limits of their abilities in a seemingly chaotic but dynamic environment. in the grueling process, students are stripped of their pre-existing habits and boundaries and gained a new understanding of themselves as creative individuals. This system of training young talents has evolved into what is now called the spiritual approach. it will be discussed in terms of its ideological background, challenges, solutions and an attempt to assess its results.

关键词： Design Foundation Taiwan Pedagogy