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Surface plasmon resonance sensor chips for the recognition of bovine serum albumin via electropolymerized molecularly imprinted polymers

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Chinese Chemical Letters 2013年第9期24卷 813-816页

作者： Yang Wang tian-xin wei Key Laboratory of Cluster Science of Ministry of Education Beijing Institute of Technology

In this paper, a surface plasmon resonance （SPR） sensor chip for detection of bovine serum album （BSA） was prepared by electropolymerization of 3-aminophenylboronic acid （3-APBA） based on molecularly imprinted polymer （MIP） technique. The surface morphology of MIP and non-imprinted （NIP） films were characterized by scanning electroscopy （SEM）. SEM images exhibited nanoscale cavities formed on the MIP films surface homogeneously due to the removal of BSA templates. The effects of pH, ion strength of rebinding BSA, the specific binding and selective recognition were studied for MIP films. Results indicated that the BSA-imprinted films exhibited a good adsorption of template protein （0.02-0.8 mg/mL） in 0.05 mol/L sodium phosphate buffer at pH 5.0 with the limit of detection （LOD） of 0.02 mg/mL.

关键词： Surface plasmon resonance Molecularly imprinted polymer Bovine serum albumin3 -APBA

Detection of parathion methyl using a surface plasmon resonance sensor combined with molecularly imprinted films

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Chinese Chemical Letters 2015年第6期26卷 797-800页

作者： Yuan Tan Israr Ahmad tian-xin wei Key Laboratory of Cluster Science of Ministry of Education Beijing Institute of Technology

An ultra-sensitive and highly selective parathion methyl （PM） detection method by surface plasmon resonance （SPR） combined with molecularly imprinted films （MIF） was developed. The PM-imprinted film was prepared by thermo initiated polymerization on the bare Au surface of an SPR sensor chip, Template PM molecules were quickly removed by an organic solution of acetonitrilelacetic acid （9：1, v/v）, causing a shift of 0.5° in SPR angle. In the concentrations range of 10^-13-10^-10 mol/L, the refractive index showed a gradual increase with higher concentrations of template PM and the changes of SPR angles were linear with the negative logarithm of PM concentrations. In the experiment, the minimum detectable concentration was 10^-13 mol/L. The selectivity of the thin PM-imprinted film against diuron, tetrachlorvinphose and fenitrothion was examined, but no observable binding was detected. The results in the experiment suggested that the MIF had the advantages of high sensitivity and selectivity.

关键词： PM detection Surface plasmon resonance Molecularly imprinted films

Internet worm early detection and response mechanism

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The Journal of China Universities of Posts and Telecommunications 2007年第3期14卷 79-84页

作者： WANG Jian LIU Yan-heng tian Da-xin wei Da College of Computer Science and Technology Jilin UniversityChangchun 130012 China

In recent years, fast spreading worm has become one of the major threats to the security of the Internet and has an increasingly fierce tendency. In view of the insufficiency that based on Kalman filter worm detection algorithm is sensitive to interval, this article presents a new data collection plan and an improved worm early detection method which has some deferent intervals according to the epidemic worm propagation model, then proposes a worm response mechanism for slowing the wide and fast worm propagation effectively. Simulation results show that our methods are able to detect worms accurately and early.

关键词： worm early detection Kalman filter worm propagation model

Molecularly imprinted polymers for highly sensitive detection of morphine using surface plasmon resonance spectroscopy

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Chinese Chemical Letters 2011年第4期22卷 477-480页

作者： Hong Xia Hao Hong Zhou Jing Chang Jun Zhu tian xin wei Key Laboratory of Evidence Science(CUPL) Ministry of EducationBeijing 100088China Forensic Sciences Institute Ministry of Public SecurityBeijing 100038China Department of Science Beijing Institute of TechnologyBeijing 100081China

Molecular imprinting technology is applied in surface plasmon resonance spectroscopy for highly sensitive and selective detection of morphine（MO）.As SPR-based sensor of MO,the preparation of molecular imprinted polymer is as follows： methacryhc acids（MAA）,ethylene glycol dimethacrylate（EGDMA）,azodiisobutyronitrile（AIBN） were used as functional monomer,cross-linker and initiator,*** experiment results showed that morphine imprinted polymer had the performance of high sensitivity and specificity,*** relative signal of SPR response was proportional to the concentration of morphine in acetonitrile in the range of 10^（-9）mol/L to 10^（-6）mol/L（1 ppb-1 ppm） with LOD of 10^（-10）mol/L,and MO was distinguished from its analogs,such as codeine.

关键词： Molecular imprinting technique(MIT) Surface plasmon resonance(SPR) Morphine Toxicological analysis

Safety research in the gasification process of novel multi-thermal-source coal gasifier

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Mining Science and Technology 2009年第2期19卷 210-215页

作者： tian Yu-xian WU Min-huan WANG Xiao-gang ZHANG Ya-ping, QIANG Jun-feng tian xin-wei WANG Xi-lian College of Sciences Xi＇ an University of Science ＆ Technology Xi ＇an Shaanxi 710054 China

In order to collect the gas safely produced in the gasification process of the novel multi-thermal-source coal gasifier,based on its gasification skill and the characteristics of the products,this paper analyzes the possible dangers in the gasification process,devises the gasifier eruption and explosion experiments,explores the conditions of gasifier eruption and gas explosion,studies their effects on the gasification process and establishes safe operation *** eruption hazard occurs easily in the gasification process of one-thermal-source coal gasifier when MSiO2 is far higher than that in the normal *** gas permeability in the gasifier is not the same and the power supply is too ***,similar conditions in the gasification of multi-thermal-source coal gasifier do not produce a gasifier eruption accident so *** it erupts,the gasifier should be stopped and then cooled down naturally or inert gas can be sprayed on the gasifier to cool it off,and thus gas explosion can be *** is a possibility of direct gas explosion,but it can be avoided when the gas in the gas collecting space is replaced slowly by supplying a small amount of power or the inert gas fills the space in the previous *** time a fire is lit is strictly controlled,the gas is drawn in by using the aspirator pump,and the gasifier pressure is kept in the state of micro-positive pressure in the middle and later gasification *** conclusion is that the gasification process of the novel multi-thermalsource coal gasifier is safe according to normal operation rules.

关键词： coal gasification novel multi-thermal-source coal gasifier gas explosion gasifier eruption

A　New　Fluorescence　Method　for　the　Measurement　of　Intracellular　Free　Rare　Earth　Ions：　Fura－2　as　an　Indicator

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Chinese Chemical Letters 1996年第9期7卷 820-822页

作者： Pin YANG tian xin wei Chun ying Jin xi WANG Da pin FAN(Institute of Molecular Science,ShanXi University,Taiyuan,030006)(Chemical and Chemical Industry College of Nanjing University,Nanjing,210093)(Medical College of NanJing University, NanJing, 210093) Institute of Molecular Science ShanXi Universíty TaiYuan 030006 Chem. and Chemical Industry College NanJing University NanJing 210093 Medical College NanJing University NanJing 210093

Fura-2 was first used to monitor intracellular RE(3+). The characterizations of RE3+-Fura-2 interactions in solutions simulating intracellular ionic composition show that La3+ and Y3+ both form 1:1 RE(3+)-fura-2 complexes. The apparent dissociation constants are 1.61×10(-7)M,and 4.04×10(-7)M,respectively. The mouse myeloma(SP2/0) cells exposed to free RE(3+) or free RE(3+) and some small molecules in body were Studied by single cell canon measurement *** results support the assumption that RE(3+) ions cannot enter the cytoplasm of living cells, and the small molecules used in our experiments couldn't improve the permeability of RE(3+)ions.

关键词： Method the Measurement Intracellular Rare Fluorescence Free

A New Self-Assembled Monolayer of Fullerene Derivative and ItsPhotoelectric Conversion Property

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Chinese Chemical Letters 1999年第5期10卷 421-424页

作者： Jin ZHAI tian xin wei Jun Hao GE Liang Bing GAN Chun Hui HUANG(State Key Laboratory of Rare Earth Materials Chemistry and Applications. Peking University.Beijng 100871) State Key Lab. Rare Earth Mat. C. Peking University Beijing 100871 China

A new self-assembled monolayer (SAM) of fullerene derivative has been fabricated and their photoelectric conversion property has been observed. The SAM was fabricated on indium-tin-oxide (ITO) and quartz by amide bonding. It was characterized bq contact angle, UV spectrum. and cyclic voltammetry. The mild fabrication conditions and the stability of the SAM provides a way to build three-dimensional structure more easily.

关键词： self-assembled monolayer C-60 derivatives photoelectric conversion

Multilayer Film Fabrication and Photoelectric Conversion Property of Two Pyrrolidinofullerene Carboxylic Acid Derivatives

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Chinese Chemical Letters 2000年第2期11卷 161-164页

作者： tian xin wei Jin ZHAI Liang Bing GAN Chun Hui HUANG (State Key Laboratory of Rare Earth Materials Chemistry and Applications, PKU-HKU Joint Laboratory on Rare Earth Materials and Bioinorganic Chemistry Peking University, Beijing 100871) State Key Lab. Rare Earth Mat. C. PKU-HKU Jt. Lab. Rare Earth Mat. B. Peking University Beijing 100871 China

Two multilayer films of pyrrolidinofullerene carboxylic acid derivatives, which exhibit photoelectric conversion property, are reported here. The first monolayers were fabricated on hydrophilic indium-tin-oxide (ITO), quartz, and mica by esterification reaction. The multilayers were characterized by contact angle and UV spectrum. The photoelectric conversion properties of both multilayer films were studied.

关键词： self-assembled multilayer film fullerene derivative photoelectric conversion

Recent progress in constructing fluorinated solid-electrolyte interphases for stable lithium metal anodes

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International Journal of Minerals,Metallurgy and Materials 2025年第2期32卷 270-291页

作者： Di Zhang Pengfei Lv wei Qin xin He Yuanhua He Civil Aircraft Fire Science and Safety Engineering Key Laboratory of Sichuan Province College of Civil Aviation Safety EngineeringCivil Aviation Flight University of ChinaGuanghan 618307China School of Chemical Engineering Sichuan UniversityChengdu 610065China

Lithium metal batteries(LMBs)are emerging as a promising energy storage solution owing to their high energy density and specific ***,the non-uniform plating of lithium and the potential rupture of the solid-electrolyte interphase(SEI)during extended cycling use may result in dendrite growth,which can penetrate the separator and pose significant short-circuit *** a stable SEI is essential for the long-term operation of the ***-rich SEI has garnered significant attention for its ability to effectively passivate electrodes,regulate lithium deposition,and inhibit electrolyte *** the structural components and preparation methods of existing fluorinated SEI is crucial for optimizing lithium metal anode *** paper reviews the research on optimizing LiF passivation interfaces to protect lithium metal *** focuses on four types of compositions in fluorinated SEI that work synergistically to enhance SEI *** instance,combining compounds with LiF can further enhance the mechanical strength and ionic conductivity of the *** metals with LiF significantly improves electrochemical performance at the SEI/anode interface,with a necessary focus on reducing electron tunneling ***,incorporating polymers with LiF offers balanced improvements in interfacial toughness and ionic conductivity,though maintaining structural stability over long cycles remains a critical area for future *** alloys combined with LiF increase surface energy and lithium affinity,challenges such as dendrite growth and volume expansion *** summary,this paper emphasizes the crucial role of interfacial structures in LMBs and offers comprehensive guidance for future design and development efforts in battery technology.

关键词： LiF lithium metal anodes solid-electrolyte interphase interface cycling stability