Open Access. Powered by Scholars. Published by Universities.®

Engineering Commons™

Open Access. Powered by Scholars. Published by Universities.®

Journal

Discipline
Institution
Keyword
Publication Year
Publication
File Type

Articles 26131 - 26160 of 27331

Full-Text Articles in Engineering

Study Of The Modified Electrolytic Manganese Dioxide, Guohui Yuan, Dewei Chu, Rihui Shen, Hongwei Pan, Cuifen Zhang Nov 1995

Study Of The Modified Electrolytic Manganese Dioxide, Guohui Yuan, Dewei Chu, Rihui Shen, Hongwei Pan, Cuifen Zhang

Journal of Electrochemistry

A modified electrolytic manganese dioside doped with Bi (Bi-EMD)wasprepared and examined by XRD and XPS. It is predominantly γ-mnO2 and the Bi exists as Bi2O3 in the modified material. The content of Bi in Bi-EMDs increased with the increasement of Bi3+ concentration in electrolyte, and reached 14.3(wt)% from the bath of 0.008 mol·L-1 Bi3+ used. Some Zn/Bi-EMD prototype batteries of AA size were assembled, and which cycle life tests showedthat the Bi-EMD has better reversibility.

Go to article

The Composition Structure And Corrosion Resistance Of Al-Mn Alloy Plating, Jiaju Guo, Naiming Guo Nov 1995

The Composition Structure And Corrosion Resistance Of Al-Mn Alloy Plating, Jiaju Guo, Naiming Guo

Journal of Electrochemistry

The Al-Mn alloy plating was electrodeposition from low temperature molten salts (below 200℃), its chemical composition control, corrosion resistance as well as the relationshipbetween chemical composition and structure were studied. The results indicate that the main effect onchemical composition of Al-Mn alloy plating is Mn ion concentration in molten salts. The Mn contentin the range of 25～40(wt)%, Al-Mn alloy plating has amorphous structure. In 0.5 mol/L H2SO4 and NaCl solution ,corrosion resistance of the alloy plating is much better. When the alloy has amorphous structure, corrosion resistance of plating has been remarkably increased.

Go to article

Influence Of O-Phenylenediamine On The Catalysis At Hrp Enzyme Electrode In 1,4-Dioxane, Hong Chen, Hui-Huang Wu Nov 1995

Influence Of O-Phenylenediamine On The Catalysis At Hrp Enzyme Electrode In 1,4-Dioxane, Hong Chen, Hui-Huang Wu

Journal of Electrochemistry

Horseradish peroxidase (HRP) was immobilized by crosslinkage on the glassycarbon electrode to prepare the enzyme electrode, where the reduction of H2O2 was studied in 1,4-dioxane media. It was shown that HRP electrode can catalyze the reduction of H2O2 without anymedintor, however, as an activator, o-phenylenediamine can promote the bio-catalysis. In thepresence of the activator, the parallel reactions occurred on the enzyme electrode. The workingcondition of the HRP electrode was investigated as the sensors for H2O2 and o-phenylenediamine, also the influence of water content in organic phase was discussed on the performance …

Go to article

Study Of The Action Mechanism Of A New Type Additive Sd-1 On The Electrodepositional Process Of Zinc, Huaqiang Wu, Yiqin Yan, Guangming Ni Nov 1995

Study Of The Action Mechanism Of A New Type Additive Sd-1 On The Electrodepositional Process Of Zinc, Huaqiang Wu, Yiqin Yan, Guangming Ni

Journal of Electrochemistry

The action mechanism of a new type additive SD-1 on the electrodepositionalprocess of zinc is reported.The results showed that the additive SD-1 is not electrochemistry activesubstane in the range of adsorption potential at rotating disk electrode surface. The action of additive SD-1 on the electrodepositional process of zinc is considerated to be fitting in with the diffusion controlmechanism.

Go to article

Bs News Oct 1995

Bs News

Building Services Engineering

No abstract provided.

Go to article

Bs News Sep 1995

Bs News

Building Services Engineering

No abstract provided.

Go to article

Linda Jacobson Interview Virtual Reality Evangelist, Loretta L. Lange Sep 1995

Linda Jacobson Interview Virtual Reality Evangelist, Loretta L. Lange

SWITCH

In the interview with Linda Jacobson, a Virtual Reality (VR) artist, Jacobson discusses the current and future state of VR technology’s role in the politics of the body, social identity, self, gender, class, and race. This article discusses the fact that barriers to access exist for a more diverse set of artists across race, class, and gender to engage with VR technology and the need to evolve the development platform, so artists can implement their ideas in a low-cost way. The author discusses Jaron Lanier’s ideas about using VR to explore other identities based on a theatrical model where the …

Go to article

Self-Assembled Monolayers: Preparation,Properties And Application, Xiandui Dong, Juntao Lu, Chuansin Cha Aug 1995

Self-Assembled Monolayers: Preparation,Properties And Application, Xiandui Dong, Juntao Lu, Chuansin Cha

Journal of Electrochemistry

Self-assembling technique is a versatile approach to the preparation of monolayersof well-defined composition, structure, thickness and physicochemical properties. Different aspects, such as wettability, adhesion, corrosion, tribology, electrontransfer, protein adsorption, molecular recognition, and applications of SAMs are widely studied. The developments in the last decade arereviewed, with special attention to the electrochemical studies related to electrodes modified with thiol-derivative-based SAMs.

Go to article

Electrodeposition Of Cobalt And Rare Earth-Cobalt In Urea-Nabr-Kbr Melt, Qiqin Yang, Kairong Qiu, Derong Zhu, Lichang Sa Aug 1995

Electrodeposition Of Cobalt And Rare Earth-Cobalt In Urea-Nabr-Kbr Melt, Qiqin Yang, Kairong Qiu, Derong Zhu, Lichang Sa

Journal of Electrochemistry

/

Go to article

Studies Of Cl- On The Electrochemical Oscillation Behaviour Of Electrodeposited Silver Indium Selenide Thin Films By Using Dynamic Impedance And The Condensance Method, Shaoai Xie, Xunnan Deng, Jinkua You Aug 1995

Studies Of Cl- On The Electrochemical Oscillation Behaviour Of Electrodeposited Silver Indium Selenide Thin Films By Using Dynamic Impedance And The Condensance Method, Shaoai Xie, Xunnan Deng, Jinkua You

Journal of Electrochemistry

The electrochemical oscillation behaviour of hydrogen peroxide cathodic reductionprocess on the electro deposited silver indium selenide electrode has been studied by using in-situ dynamic impedance and the condensance measurement technique in different supporting electrolytes solutions. The surface composition of AglnSe2 electrodes (before and after oscillating) were also givenby AES. According to the experimental results, the influence of Cl- on the mechanism of this electrochemical oscillaton process has been discussed in detail.

Go to article

The Oxidation Of Hydrogen Absotbing Alloys And Its Inhibition, Suqin Wang, Baojia Xia, Geping Yin, Pengfei Shi Aug 1995

The Oxidation Of Hydrogen Absotbing Alloys And Its Inhibition, Suqin Wang, Baojia Xia, Geping Yin, Pengfei Shi

Journal of Electrochemistry

This paper introduces the method to judge: 1)the possibility of oxidation of themetal hydride electrode in an anode process by cyclic voltammetric curves, 2)the oxidation pattern ofmetal hydride electrode in oxygen atmosphere in various charged states, and 3)the inhibition ofoxidation of hydrogen absorbing alloys by certain surface treatment.

Go to article

Problems On The Study Of Anodic Films On Pb In Sulfuric Acid Solution (Ⅰ), Wenbin Cai, Houtian Liu, Weifang Zhou Aug 1995

Problems On The Study Of Anodic Films On Pb In Sulfuric Acid Solution (Ⅰ), Wenbin Cai, Houtian Liu, Weifang Zhou

Journal of Electrochemistry

The identification of the phase composition of the anodic film on Pb formed in H2SO4 solution in PbO potential region has long been argued, together with the explanation of thecathodic peak at about -0.9V (Hg/HgSO4) in the linear sweep voltammogram for a Pb-H2SO4 system. In this article, a review of our recent investigations was presented on the above problems.

Go to article

Progress In R&D Of Lithium Rechargeable Batteries In China, Jiqiang Wang Aug 1995

Progress In R&D Of Lithium Rechargeable Batteries In China, Jiqiang Wang

Journal of Electrochemistry

No abstract provided.

Go to article

The Influnce Of Conjugated Π Bond In Promoter Molecule On The Direct Electrochemical Reaction Of Cytochrome C, Xiaogang Qu, Tianhong Lu, Shaojun Dong Aug 1995

The Influnce Of Conjugated Π Bond In Promoter Molecule On The Direct Electrochemical Reaction Of Cytochrome C, Xiaogang Qu, Tianhong Lu, Shaojun Dong

Journal of Electrochemistry

The promoter effect of thiophene with only one-functional group on the directelectrochemical reaction of cytochrome c was compared with that of tetrahydrothiophene in this report. It was found that thiophene is a good promoter. But tetrahydrothiophene could not facilitate the directelectrochemistry of cytochrome c although this compound is very similar to thiophene in str uctureexcept for conjugated π bond. This demonstrated that the conjugated π bond in thiophene plays animportant role for the acceleration of the direct electrochemistry of cytochrome c.

Go to article

The Photoelectrochemical Studies Of Passive Films On Rebar Electrodes In Simulated Cement Pore Solution, Wei Chu, Yuanxiang Shi, Baoming Wei, Yong Yang, Xuguang Chen, Zugeng Lin Aug 1995

The Photoelectrochemical Studies Of Passive Films On Rebar Electrodes In Simulated Cement Pore Solution, Wei Chu, Yuanxiang Shi, Baoming Wei, Yong Yang, Xuguang Chen, Zugeng Lin

Journal of Electrochemistry

The electronic properties of the passive film on REBAR electrodes in simulatedcement pore solution (pH=9.0～13.8) have been investigated using in-situ photoelectrochemical methods. The results show that the passive film is composed of mixed oxides of ferrum, and it is an amorphous, n-type semiconductive film. Variations of pH values, ions in the solution and film-formation potentials can affect the composition of the films. There are two main stages in the growthof the film, with two rate functions characterized by linear relation between the film thickness and thelogarithm of time. The addition of inhibitor NaNO2 changes the composition, structure and growth …

Go to article

Properties Of Zr-Based Laves Phase Hydrogen Storage Electrode, Xueping Gao, Huabin Yang, Deying Song, Yunshi Zhang, Zuoxiang Zhou, Wei Zhang, Panwen Shen Aug 1995

Properties Of Zr-Based Laves Phase Hydrogen Storage Electrode, Xueping Gao, Huabin Yang, Deying Song, Yunshi Zhang, Zuoxiang Zhou, Wei Zhang, Panwen Shen

Journal of Electrochemistry

After treated by HF solution,the surface of Zr(V0.2Mn0.2Ni0.54Mo0.06)2.4 alloy was transformed from Zr-rich and Mn-rich layer to Ni-rich layer. In this way, the nickel on thesurface could be believed to be the Raney-type nickel, which could obviously shorten the activation cycles, improve electrocatalytic activity and hydrogen adsorption ability. In this paper, the reaction mechanism on the alloy surface (i.e. the mechanism of nickel-catalysis, hydrogen-adsorption and hydrogen-transference) had been investigated. And the impedance spectra were fitted to an equivalentcircuit using a non-linear, least-squares (NLLS) fitting program.

Go to article

Theory Of Cyclic Voltammetry At Microdisk Electrode For Reversible Systems, Qiankun Zhuang, Hongyuan Chen Aug 1995

Theory Of Cyclic Voltammetry At Microdisk Electrode For Reversible Systems, Qiankun Zhuang, Hongyuan Chen

Journal of Electrochemistry

By means of a new approach, the current equations of cyclic voltammetry which describes two cases of quasi-steady-state and fast linear scan at microdisk electrode for reversiblesystem were presented and verified experimentally. It has been shown that the features of this currentessentially depend on the ration of, which is described in detail. ln extreme cases, the equationsare the same as those listed in literatures for large plane and spherical electrodes. Using the quasi-steady-state equation, the causes and conditions for forming steady state, quasi-steady state andhysteresis current for linear sweep voltammetry are all explained and discussed. The width of the ″hysteresis …

Go to article

Coadsorption Of Para-Toluene Sulfamide And 1.4-Butynediol At Mercury Electrode, Shukun Huang, Naixian Xie, De Gao, Qiang Liu Aug 1995

Coadsorption Of Para-Toluene Sulfamide And 1.4-Butynediol At Mercury Electrode, Shukun Huang, Naixian Xie, De Gao, Qiang Liu

Journal of Electrochemistry

The coadsorption characteristics of para-toluene sulfamide and 1,4-butynediol atmercury electrode have been studied by means of electrocapillary curve, differential capacity curve, Stuart model and the SCFMO method (CNDO/2). The coadsorption is a physical adsorption occuringnaturally. Lateral and flat orientations in the two adsorbates close to their maximum adsorptionpotential were considered respectively. Unlike attractive interactions of their own, there was arepulsive interaction at their coadsorption layer. A preferred adsorption of 1,4-butynediol occurred when they were at the same volume concentration.

Go to article

A Relativistic Density-Functional Investigation Of Vibrational Frequencies Of Cn- On Cu And Ag Electrodes, Mengsheng Liao, Xin Lv, Qianer Zhang Aug 1995

A Relativistic Density-Functional Investigation Of Vibrational Frequencies Of Cn- On Cu And Ag Electrodes, Mengsheng Liao, Xin Lv, Qianer Zhang

Journal of Electrochemistry

/

Go to article

Development Of High Active Aluminum Alloy Sacrificail Anode, Zhaobo Wei, Jianhua Wu, Guangzhang Chen, Songrao Jiang, Zenya Li Aug 1995

Development Of High Active Aluminum Alloy Sacrificail Anode, Zhaobo Wei, Jianhua Wu, Guangzhang Chen, Songrao Jiang, Zenya Li

Journal of Electrochemistry

A high active aluminum alloy sacrificial anode with the operating potential-1.40 v (SCE), and the the current capacity more than 2175 A·h/kg and dissolution fair issuccessfully developed by adding zinc, indium, gallium, bismuth and heat treatment. The aluminumalloy sacrificial anode with super electrochemical properties can throughly replace the magnesium alloyanode when applied to seawater and freshening seawater, which is obviously advantageous to thetechnology and economy.

Go to article

Studies On The Structure Of Licoo2 Synthesized With Tartaric Acid And The Behaviorof Its Rechargeable Lithium Battery, Fuping Zhang Aug 1995

Studies On The Structure Of Licoo2 Synthesized With Tartaric Acid And The Behaviorof Its Rechargeable Lithium Battery, Fuping Zhang

Journal of Electrochemistry

The structure of LiCoO2 synthesized with tartaric acid and the behavior of itsrechargeable Lithium battery have been studied by XRD, XPS, CV, CT. It has been shown that LiCoO2 has a space group R3m with hexagonal parameters a=0.2810 nm, c=1.4088 nm. Low-spin state Co3+ configuration in LiCoO2 has been suggested. Also, Li2O, was identified onits surface. Furthermore, the capacity and the middle working voltage of its Lithium battery are about 120 mA·h·g-1 and 3.8 V, respectively. The EMF of the cell changes with the Lithium composition of itscathode following E=4.318-0.450 X2/3 in …

Go to article

Effect Of Symmetric Alternating Current On Cathode Surface Before Iron Deposition, Xintan Hu Aug 1995

Effect Of Symmetric Alternating Current On Cathode Surface Before Iron Deposition, Xintan Hu

Journal of Electrochemistry

The composition and thickness of active film formed on the surface of cathode made of low carbon steel after treated by symmetric alternating current (SAC) in ferris chloride bathis studied,and the interfacial morphology of the iron deposit and the substrate is also examined. The results show that the active film, which a thickness of 20～25nm can be obtained under SAC densityof about 7 A·dm-2 ,so that the adherent iron deposit can be achieved on the active film. The effect of SAC on cathode surface is discussed in detail.

Go to article

Photoelectric Property For Zinc Phthalocyanine Of Doping C60 On Inp Electrode, Mengxiong Zhan, Rongqing Yu, Biaolian Zhen, Dadian Cheng, Lansun Zheng Aug 1995

Photoelectric Property For Zinc Phthalocyanine Of Doping C60 On Inp Electrode, Mengxiong Zhan, Rongqing Yu, Biaolian Zhen, Dadian Cheng, Lansun Zheng

Journal of Electrochemistry

The curves of spectral and photovoltaic responses to zinc phthalocyanine of doping C60 were determinted. The photovoltaic property for zinc phthalocyanine of doping C60 wereinvestigated on the InP single crystal in the photoelectrochemical cell.The results have shown that: 1)The photovoltaic effect and the in tensities of the spectral response and of the photovoltaic responsefor ZnPc of doping C60 were greater than those of ZnPc; 2)had better redox couple in the cells.

Go to article

Studies On The Bright Zinc-Nickel Alloy Palting In Alkaline Baths, Jiale Cai, Shaomin Zhou Aug 1995

Studies On The Bright Zinc-Nickel Alloy Palting In Alkaline Baths, Jiale Cai, Shaomin Zhou

Journal of Electrochemistry

The electrochemical properties of the Zn-Ni plating baths and the structure andperformance of the obtained deposits were investigated. The results show that the nickel content of theobtained deposits is incereased with decreasing of Zn2+/Ni2+ ratio in the baths and with increasing of cathodic current density; The cathode current efficiency is increased with increasing of Zn[Ⅱ] content in the bath and with decreasing of cathodic current density. The ZN-11 additive used is thereaction product of heterocyclic compound and polyamines with epichlorohydrin, it has a higheradsorptivity on Hg-electrode at potential between -0.16～-1.68 V (vs. Hg/HgO, 1 mol·L-1 KOH). …

Go to article

Study On The Surface States Of Zinc Sulfide Thin Film Doped With Erbium And Their Effect On The Relaxation Luminance, Yujiang Wang, Zhaohong Liu, Zhenxiang Chen Aug 1995

Study On The Surface States Of Zinc Sulfide Thin Film Doped With Erbium And Their Effect On The Relaxation Luminance, Yujiang Wang, Zhaohong Liu, Zhenxiang Chen

Journal of Electrochemistry

X-ray photoelectron spectrum and characteristics of the capacity, versus thevoltage of the thin film devices are measured to study the surface states of the zinc sulfide thin film.The transient electroluminescence excited by pulses shows the relaxation luminance peaks during anon-exponential decay process of the characteristic transitions activated by Er3+ in the ZnS directcurrent thin film electroluminescence (DCTFEL) devices.The surface structures of ZnS:Cu, Cl, Erfilm with the absorption of oxygen, and the effect of the surface states on the relaxation luminance ofthe devices are discussed.

Go to article

37th Rocky Mountain Conference On Analytical Chemistry Jul 1995

37th Rocky Mountain Conference On Analytical Chemistry

Rocky Mountain Conference on Magnetic Resonance

Final program, abstracts, and information about the 37th annual meeting of the Rocky Mountain Conference on Analytical Chemistry, co-sponsored by the Colorado Section of the American Chemical Society and the Rocky Mountain Section of the Society for Applied Spectroscopy. Held in Denver, Colorado, July 23-27, 1995.

Go to article

A Calculation Method For Transport Properties For The Prediction Of Combustion Characteristics Of Marine Fuel Oils, Cherng-Yuan Lin, Tze-Chin Pan, Cheh-Shiung Chen Jun 1995

A Calculation Method For Transport Properties For The Prediction Of Combustion Characteristics Of Marine Fuel Oils, Cherng-Yuan Lin, Tze-Chin Pan, Cheh-Shiung Chen

Journal of Marine Science and Technology–Taiwan

The primary purpose of this study is to propose a calculation method of transport properties in numerical studies on the combustion of marine diesel fuel oils which are composed of undefined hydrocarbon components and various extents of immiscible matters. This proposed method is further applied to the theoretical analysis for the combustion model for a single liquid droplet. It is shown that fuel oil A has the properties of higher flame temperature and burning rate constant while lower stand-off ratio and mass burning rate than those of heavy fuel oil C. The proposed calculation procedure is also suggested to be …

Go to article

Optimization Of Design Parameters For Spines Of Various Geometries, Rong-Hua Yeh Jun 1995

Optimization Of Design Parameters For Spines Of Various Geometries, Rong-Hua Yeh

Journal of Marine Science and Technology–Taiwan

This work presents a systematic study on the optimum base diameter, length, heat dissipation, temperature profile, and efficiency of spines by employing fin parameter versus fin efficiency method. The temperature dependent heat transfer coefficient is assumed to be a power-law type. Several common fin geometries including cylindrical, convex parabolic, conical, and concave parabolic profiles are investigated respectively. It is found that the optimum dimensions of spines are functions of fin volume, heat transfer coefficient at fin base, and thermal conductivity. To facilitate the thermal design of heat transfer components, simple mathematical expressions as well as design charts are presented.

Go to article

Aggregate Effect On Elastic Moduli Ofcement-Based Composite Materials, C.C. Yang, R. Huang, W. Yeih, I.C. Sue Jun 1995

Aggregate Effect On Elastic Moduli Ofcement-Based Composite Materials, C.C. Yang, R. Huang, W. Yeih, I.C. Sue

Journal of Marine Science and Technology–Taiwan

The elastic moduli of cement-based composite materials with different types of aggregates were investigated in this study. Twelve mixes with various volume fractions (10%, 20%, and 30% ) were selected. Cylindrical specimens with a dimension of ∮ 10 x 20 cm were cast and tested. Electric strain gages were used and elastic moduli were obtained from the stressstrain curves. Theoretical moduli were calculated based on H-S bounds and micromechanics. Test results show that the types and volume fractions of aggregates significantly affect the elastic moduli of concrete composite materials and the theoretical predictions fairly agree with the experimental data.

Go to article

Note On Effect Of Elastic Deformation At The Root Of A Cantilever Beam, M.T. Liang, D.B. Chan Jun 1995

Note On Effect Of Elastic Deformation At The Root Of A Cantilever Beam, M.T. Liang, D.B. Chan

Journal of Marine Science and Technology–Taiwan

Parkes neglected elastic strains and examined a classical problem of rigid- plastic structural dynamics for finding the deformation of a cantilever beam carrying a mass at its tip which is subjected to a short pulse loading. Symonds and Fleming examined the Parkes problem by making comparison between exact numerical solutions obtained from an ABAQUS program for an elastic-plastic beam and the rigid-plastic solution slightly modified to allow for large deformation. Further observation is acquired by comparision also with a simplified elastic-plastic approach based on treatment of elastic and plastic action in artificially separated stages. and Yu examined the Parkes problem …

Go to article

First Prev Next Last