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Research on Nanometer Technique and Low-Work-Loss Sensor

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稀有金属材料与工程 2006年第S3期 110-112页

作者： Lan Wang~1 Yayan Liu~1 Yifei Yang~(1,2. Jingwen He~1 (1.changchun Institute of applied {2.,chinese academy of sciences,changchun 13002.,china) (2.Graduate School of chinese academy of sciences,Beijing 100080,china)

The preparation process of the CO gas sensor used at normal temperature is *** electric conductance of this type of sensor evolved oscillation from regularly when the sensor is exposed to low level CO *** gas sensing mechanism was investigated by its crystalline *** mechanism of information sensing,which was the concurrence of the grain boundary barrier control and the crystal surface control,is discussed.

关键词： nanometer technique low-work-loss sensor

Morphological and Structural Studies of sPS/aPS Blends

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chinese Chemical Letters 1998年第4期9卷 407-410页

作者： Sheng Qing XU Bin CHEN Yang LIU He Sheng CHEN Bao Tong HUANG(changchun Institute of applied {2., chinese academy of sciences, changchun 13002.) Acad Sinica Changchun Inst Appl Chem Changchun 130022 Peoples R China

The morphology and structure of the syndiotactic polystyrene (sPS)/atactic polystyrene (aPS) blends with various compositions have been studied by means of DSC, optical microscopy, SAXS, and WAXD. The results show that aPS is miscible with amorphous region of sPS. There is no macroscopic evidence that aPS forms separated domains in the blends. The decrease in crystallinity of sPS in the blends implies segregation of the aPS to the interfibrillar regions of the spherulites of sPS. The constancy of interlamellar distance and melting points indicates that the fibrillar structural units of sPS is unchanged on addition of aPS to sPS, and the unchanging parameters of the sPS unit cells mean that aPS does not enter the unit cells of sPS.

关键词： blend syndiotactic polystyrene compatibility structure

THE　APPLICATION　OF　THE　MPB4　THEORY　TO　THE　INTERFACE　BETWEEN　TWO　IMMISCIBLE　ELECTROLYTE　SOLUTIONS．　PART4．　THE　DIFFERENTIAL　CAPACITANCE　OF　THE　WATER／NITROBENZENE　INTERFACE　IN　THE　PRESENCE　OF　2.2.ELECTROLYTE

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chinese Chemical Letters 1996年第7期7卷 647-650页

作者： Qi Zhi CUI Yan Xiu ZHOU GuoYi ZHU Er Kang WANG(Laboratory of Electroanalytical chemistry,changchun Institute of {2. chemistry,chinese academy of sciences, changchun, Jilin13002.) Lab. of Electroanalytical chemistry Changchun Inst. of Applied Chemistry Chinese Academy of Sciences Changchun Jilin 130022

We have developed a new theoretical model based on the MPB4 theory to calculate thedifferential capacitance of the interface of 0.05mol/L MgSO4 in water and 0.1mol/L TBATPB innitrobenzene. Our results coincide with the experimental values very well. It indicates that our modelmay describe well the structure of ITIES not only in the presence of 1:1 electrolyte but also in thepresence of 2.2.electrolyte.

关键词： MPB4 THEORY OF TO BETWEEN APPLICATION

^(13)C NMR study of D-pantothenic acid complexes with heavy lanthanide ions in aqueous solution

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chinese Journal of chemistry 1991年第3期9卷 212-221页

作者： REN,Ji-Min PEI,Feng-Kui WANG,Wen-Yun changchun Institute of applied {2.,chinese academy of sciences,changchun 13002. changchun Institute of applied {2. Chinese Academy of Sciences Changchun 130022

The ^(13)C NMR study of the interaction between the trivalent lanthanide ions(from Dy to Lu) and D-pantothenic acid in aqueous solution was *** unambiguous resonance assignments were made on the basis of pH dependence and the analysis of molecular geometry.^(13)C paramagnetic shifts were separated into the contact and dipolar components by Reilley's *** complex stability constant is 12.0 L/mol for the 1:1 ytterbium *** analysis of the shift data shows that heavy lanthanide ions form isostructural complexes with the substrate and the hyperfine coupl- ing constant is independent of the ions used in the study.D-pantothenic acid is coordinated to the metal via the two oxygens of the carboxyl group with 2.2. of Ln—O *** electron spin density distribution and the structural details of the complex were elucidated from the shift data. It is stated that contact contributions,while small for nuclei of several bonds away from the metal, should not be dismissed a priori.

关键词： than NMR acid

Nonlinear analysis on the coupling process of electromagnetic vibrator and earth

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Science china Earth sciences 2005年第8期48卷 1175-1182页

作者： CHEN Zubin1,2. TENG Jiwen2. LIN Jun1, ZHANG Linhang1 & JIANG Zhongjin1 1. Institute of Intelligent Instrument & Measurement Control Technology, Jilin University, changchun 13002., china 2. Institute of Geology & Geophysics,{2., Beijing 10002., china 1. Institute of Intelligent Instrument & Measurement Control Technology Jilin University 130026 Changchun China 2. Institute of Geology & Geophysics Chinese Academy of Sciences 100029 Beijing China

The linear model based on the hydraulic pressure vibrator has been no longer adaptable to the electromagnetic vibrator. In order to realize the effective transmission of the limited energy from the vibrator to the ground, it is important to study the coupling model of the electromagnetic vibrator and the earth. In this paper, a nonlinear restore term was introduced to the coupling model because of the existence of a large amount of harmonics in the vibrator baseplate. The nonlinear vibration analysis was applied to the model by the multiscale method. In the course of energy transmission from the vibrator to the ground, ultraharmonic resonance was used to explain the generation of harmonics. An improved scheme was advanced to select the cross correlation reference signal in the vibrator seismic exploration. Good application results were obtained in field experiments.

关键词： vibrator, coupling model, electromagnetic, nonlinear vibration.

Electrochemical synthesis and characterization of polydiphenylamine

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chinese Journal of chemistry 1992年第1期10卷 10-16页

作者： DONG,Shao-Jun SONG,Fa-Yi LI,Zhuang Laboratory of Electroanalytical chemistry,changchun Institute of {2. chemistry,The chinese academy of sciences,changchun,Jilin 13002. Laboratory of Electroanalytical chemistry Changchun Institute of Applied Chemistry The Chinese Academy of Sciences Changchun Jilin 130022

Electrochemical oxidation of diphenylamine(DPA)in acetonitrile solution produced an adhesive conducting polydiphenylamine(PDPA)film on the electrode,which exhibited multiple colour variation in a wide range of *** polymer was characterized by cyclic voltam- merry,FTIR and *** results indicate that the electropolymerization of diphenylamine per- forms via the 4,4＇C—C phenyl-phenyl coupling ***,ESR and conductivity mea- surements for the different states of PDPA show that polydiphenylamine can be reversibly doped and dedoped either chemically or *** is evidenced also that there are paramagnetic species—polarons in PDPA supposed to be the current carrier.

关键词： Electrochemical synthesis and characterization of polydiphenylamine PDPA

A Chemiluminescence Optical Fiber Glucose Biosensor Based on Co-immobilizing Glucose Oxidase and Horseradish Peroxidase in a Sol-gel Film

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Chemical Research in chinese Universities 2002年第1期18卷 12-15页

作者： LI Ying-xiu, ZHU Lian-de and ZHU Guo-yi State Key Lab of Electroanalytical chemistry, changchun Institute of {2. chemistry, chinese academy of sciences, changchun 13002., P.R. chinaZHAO Chun College of chemistry, Jilin University, changchun 13002., P chinese Acad Sci Changchun Inst Appl Chem Electroanalyt Chem Lab Changchun 130022 Peoples R China Jilin Univ Coll Chem Changchun 130023 Peoples R China

An optical fiber bienzyme sensor based on the luminol chemiluminescent reaction was developed and demonstrated to be sensitive to glucose. Glucose oxidase(GOD) and horseradish peroxidase(HRP) were co-immobilized by microencapsulation in a sol-gel film derived from tetraethyl orthosilicate(TEOS). The calibration plots for glucose were established by the optical fiber glucose sensor fabricated by attaching the bienzyme silica gel onto the glass window of the fiber bundle. The linear range was 0 2.2.mmol/L and the detection limit was approximately 0 12.mmol/L. The relative standard deviation was 5.3% ( n =6). The proposed biosensor was applied to glucose assay in ofloxacin injection successfully.

关键词： Fiber optical biosensor Sol-gel Chemiluminescence Glucose oxidase Horseradish peroxidase Glucose assay

Preparation and Characterization of Layered Compound Zirconium Bis(monohydrogenphosphate) Intercalated with Rare Earth Complex

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chinese Chemical Letters 2000年第2期11卷 171-174页

作者： Lian She FU1 Qing Hong XU2.Hong Jie ZHANG1 Lian Sheng LI2.Jia Zuan NI1 Ru Ren XU 2.(1Key Laboratory of Rare Earth chemistry & Physics, changchun Institute of {2. chemistry, chinese academy of sciences, changchun 13002. 2.Key Laboratory of Inorga chinese Acad Sci Changchun Inst Appl Chem Key Lab Rare Earth Chem & Phys Changchun 130022 Peoples R China Jilin Univ Dept Chem Key Lab Inorgan Synth & Preparat Chem Changchun 130023 Peoples R China

Layered compound zirconium bis(monohydrogenphosphate)(alpha-ZrP) intercalated with rare earth complex Eu(DBM)(3)phen was prepared. The pre-intercalation of p-methoxyaniline into alpha-ZrP makes the interlayer separation large enough to exchange PMA with europium complex, thus, the luminescent assembly was prepared. This was confirmed by X-ray diffraction, UV-visible spectra and elemental analysis. The fluorescence spectra and lifetime of the assembly were also presented.

关键词： layered compound rare earth complex luminescence

Four-Level Decay Model of^6P_(7/2. Excited State of Eu^(2.) Ion in KMgF_3

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chinese Chemical Letters 2001年第2期12卷 175-178页

作者： Hai Quan SU, Xian Ming ZHANG, ChunYu ZANG, Chun Shan SHI( Key Laboratory of Rare Earth chemistry and Physics, changchun Institute of {2. chemistry, chinese academy of sciences, changchun 13002. Key Lab. Rare Earth Chem. and Phys. Changchun Inst. of Applied Chemistry Chinese Academy of Sciences Changchun 130022 China

A four-level decay model of ~6P_(7/2. excited state of Eu^(2._ ion in KMgF_3: Eu^(2.) has been proposed. The decay profiles of the ~6P_(7/2. excited state of Eu^(2.) are two exponential and the physical implication of each term in the fit equation responsible for the model is interpreted. The data obtained spectroscopically are in good agreement with the fit results.

关键词： Four-level decay model divalent europium ~6P_(7/2. excited state KMgF_3.