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The Amperometric Glucose Enzyme Electrode by Immobilized Glucose Oxidase in Glucose Oxidase/N-ethyl-Poly (4-vinyl)pyridine Multilayer

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Chinese Chemical Letters 1998年第11期9卷 0-0,0页

作者： Ma, yz Heze Teachers Coll Dept Chem Shandong 274015 Peoples R China

Multilayers of glucose oxidase(GOD)/N-ethyl-poly (4-vinyl) pyridine (EPVP) have been assembled on thiol self-assembled monolayers on gold *** electrode can be used as an amperometric enzyme elcctrode for glucose. Fe (CN)63-/4- incorporated in EPVP layer acts as the electron mediator, the linear range was 0.1 to 6 mmol/L when the number of GOD layers was 5.

关键词： Enzyme electrode glucose oxidase N-ethyl-poly (4-vinyl) pyridine. multilayer.

Supramolecular assemblies from single-chain hydrocarbon fluorocarbon hybrid bolaamphiphiles

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Chinese Journal of Chemistry 1996年第2期14卷 171-179页

作者： Yu, B Hui, yz CHINESE ACAD SCI SHANGHAI INST ORGAN CHEMSTATE KEY LAB BIOORGAN & NAT PROD CHEMSHANGHAI 200032PEOPLES R CHINA

Three types of single-chain hydrocarbon fluorocarbon hybrid bolaamphiphiles were synthesized. They readily formed different kinds of organized supramolecular assemblies, including vesicles, tapes, and micellar fibers, in aqueous solution. The aggregates morphology was characterized by transmission electron microscopy (TEM) after negative staining. The superstructures of these aggregates seemed to be determined by the geometry and the head group's properties of the corresponding amphiphiles..

关键词： assemblies single-chain hydrocarbon fluorocarbon hybrid bolaamphiphile

Aseismic Reliability Analysis Approach for Offshore Jacket Platform Structures

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China Ocean Engineering 1998年第4期13卷 375-382页

作者： Zhuang, yz Jin, WL Zhejiang Univ Dept Civil Engn Hangzhou 310027 Peoples R China

By means of nonlinear pushover collapse analysis approach, the aseismic reliability analyses of two offshore jacket platforms in the Bohai Gulf in China are studied according to their ocean location and environmental loadings there. On the basis of those analyses, an aseismic reliability analysis approach is presented. The results show that the aseismic reliability of those platforms is high. Also it is proved that this aseismic reliability analysis approach is simple, practical and reliable.

关键词： offshore jacket platform aseismic reliability nonlinear pushover collapse analysis

THE DIRECT KINEMATIC SOLUTION OF THE PLANAR STEWART PLATFORM WITH COPLANAR GROUND POINTS

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Journal of Computational Mathematics 1996年第3期14卷 263-272页

作者： Wu, WD Huang, yz CHINESE ACAD SCI INST SYST SCIMATH MECHANIZAT RES CTRBEIJINGPEOPLES R CHINA BEIJING MUNICIPAL COMP CTR BEIJINGPEOPLES R CHINA

A procedure of computing the position of the planar Stewart platfrom with coplanar ground points is presented avoiding the computation of Groebner basis by standard algorithm. The polynomial system resulted is triangu... 详细信息

关键词： EH THE DIRECT KINEMATIC SOLUTION OF THE PLANAR STEWART PLATFORM WITH COPLANAR GROUND POINTS

New Formulas of Earth Pressure on Large Successive Cylinders

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China Ocean Engineering 1998年第4期13卷 443-452页

作者： Wang, yz Meng, QW Tianjin Univ Dept Port Waterway & Coastal Engn Tianjin 300072 Peoples R China Minist Railway 3rd Survey & Design Inst Tianjin 300142 Peoples R China

The retaining wall made of large successive cylinders is a kind of structure which draws much attention in coastal engineering of China. The earth pressure on the arched back of large successive cylinders is different from that on the plane back of a general wall. On the basis of equilibrium of forces on the strip element taken from the soil between two cylinders, the differential equation is established and the analytic solution to the equation is obtained. The formulas of earth pressure on large successive cylinders are given in this paper. The distribution of earth pressure around the circle given by the present formulas is different from that given by the formulas commonly used at present, but it is identical with that measured in the model test.

关键词： successive cylinders earth pressure analytic solution

Isolation and structural elucidation of a polysaccharide with radiation-protective activity from Spirulina platensis

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Chinese Journal of Chemistry 1996年第3期14卷 279-285页

作者： Guo, ZW Hui, yz CHINESE ACAD SCI SHANGHAI INST ORGAN CHEMSTATE KEY LAB BIOORGAN & NAT PROD CHEMSHANGHAI 200032PEOPLES R CHINA

The structure of a radiation-protective sulfated polysaccharide, SP-APS, isolated from Spirulina platensis, was investigated by methylation analysis, partial acetolysis and H-1-NMR spectroscopy. The repeating-unit of ... 详细信息

关键词： polysaccharide Spirulina platensis structure elucidation

Polysiloxane-grafted Silica as Modifier for Epoxy Moulding Compounds

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Journal of Materials Science & Technology 1996年第5期12卷 395-397页

作者： Hou, QP Huang, Y Yu, yz ACAD SINICA INST CHEMBEIJING 100080PEOPLES R CHINA

Polysiloxanes were grafted onto silica through functional group reactions. Polysiloxane-grafted silica is effective in lowering internal stress and enhancing crack resistance of the epoxy moulding compounds (EMC). No discrete polysiloxane domains were formed in the EMC, and the bleeding-out of polysiloxane can be solved by using the grafted silica as low stress modifier.

关键词： Epoxy resins

Multivariate adaptive regression splines analysis for 3D slope stability in anisotropic and heterogenous clay

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Journal of Rock Mechanics and Geotechnical Engineering 2023年第4期15卷 1052-1064页

作者： Jim Shiau Van qui Lai Suraparb Keawsawasvong School of Civil Engineering and Surveying University of Southern QueenslandToowoombaQueensland4350Australia Faculty of Civil Engineering Ho Chi Minh City University of Technology(HCMUT)268 Ly Thuong Kiet StreetDistrict 10Ho Chi Minh CityViet Nam Vietnam National University Ho Chi Minh City(VNU-HCM) Linh Trung WardThu Duc DistrictHo Chi Minh CityViet Nam Department of Civil Engineering Thammasat School of EngineeringThammasat UniversityPathumthaniBangkok12120Thailand

Little research can be found in relation to the stability of anisotropic and heterogenous soils in three *** this paper,we propose a study on the three-dimensional(3D)undrained slopes in anisotropic and heterogenous clay using advanced upper and lower bounds finite element limit analysis(FELA).The obtained stability solutions are normalized,and presented by a stability number that is a function of three geometrical ratios and two material ratios,*** ratio,length ratio,slope angle,shear strength gradient ratio and anisotropic strength *** results are compared with experimental data in the literature,and charts are presented to cover a wide range of design *** the multivariate adaptive regression splines(MARS)analysis,the respective influence and sensitivity of each design parameter on the stability number and the failure mechanism are *** empirical equation is also developed to effectively estimate the stability number.

关键词： 3D undrained slope Limit analysis Anisotropy Heterogeneity

Josephson vortices and intrinsic Josephson junctions in the layered iron-based superconductor Ca_(10)(Pt_(3)As_(8))((Fe_(0.9)Pt_(0.1))_(2)As_(2))_(5)

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Chinese Physics B 2022年第9期31卷 128-133页

作者： Qiang-Tao Sui Xiang-Gang qui Beijing National Laboratory for Condensed Matter Physics Institute of PhysicsChinese Academy of SciencesBeijing 100190China School of Physical Sciences University of Chinese Academy of SciencesBeijing 100049China Songshan Lake Materials Laboratory Dongguan 523808China

Modulated electronic state due to the layered crystal structures brings about moderate anisotropy of superconductivity in the iron-based superconductors and thus Abrikosov vortices are expected in the mixed ***,based on the angular and temperature dependent transport measurements in iron-based superconductor Ca_(10)(Pt_(3)As_(8))((Fe_(0.9)Pt_(0.1))_(2)As_(2))_(5) with Tc(≌)12 K,we find clear evidences of a crossover from Abrikosov vortices to Josephson vortices at a crossover temperature T*(≌)7 K,when the applied magnetic field is parallel to the superconducting FeAs layers,i.e.,the angle between the magnetic field and the FeAs layers θ=0°.This crossover to Josephson vortices is demonstrated by an abnormal decrease(increase)of the critical current(flux-flow resistance)below T*,in contrast to the increase(decrease)of the critical current(flux-flow resistance)above T* expected for Abrikosov ***,when θ is larger than 0.5°,the flux-flow resistance and critical current have no anomalous behaviors across T*.These anomalous behaviors can be understood in terms of the distinct transition from the well-pinned Abrikosov vortices to the weakly-pinned Josephson vortices upon cooling,when the coherent length perpendicular to the FeAs layers ξ⊥ becomes shorter than half of the interlayer distance d/*** experimental findings indicate the existence of intrinsic Josephson junctions below T* and thus quasi-two-dimensional superconductivity in Ca10(Pt3As8)((Fe0.9Pt0.1)2As2)5,similar to those in the cuprate superconductors.

关键词： iron-based superconductor Abrikosov vortices Josephson vortices intrinsic Josephson junctions