Chapter 10. Modified electrodes
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Electrochemical Impedance Techniques in Corrosion Science
A review is presented of the use of impedance techniques in corrosion science. Emphasis is placed on defining the type of data that is required in corrosion studies, and then comparing different methods for generating the required information by electrochemical impedance methods. The performance characteristics of the…
Effect of Various Additives on Sintering of Aluminum Nitride
AlNの焼結に及ぼす各種添加物の影響を30種の添加物を用いて検討した. その結果, 添加物の内アルカリ土類属又は希土類酸化物がAlNとの相反応により窒素を含むアルミネート相を生成し, これがAlNのち密化を促進して理論密度焼結を達成することが確認された. 焼結体の微細組織は上記のち密化が液相焼結に起因していることを示した. 一方Si化合物はAlNポリタイプのようなより耐熱性の高い化合物を生成しち密化を阻害した.
Combustion and pyrolysis of poly(ethylene terephthalate). I. The role of flame retardants on products of pyrolysis
The products of pyrolysis of untreated and flame-retarded poly(ethylene terephthalate) (PET) have been studied at two temperatures using a flash pyrolysis/gas chromatography technique. The pyrolysis products were identified by gas chromatography/mass spectrometry and reaction mechanism for their formation are proposed…
Symbiotic Utilization of Polyvinyl Alcohol by Mixed Cultures
Polyvinyl alcohol (PVA)-utilizing cultures were obtained from various sources. They were mixed cultures even after cyclical transfer to liquid and plate media with PVA as a sole source of carbon. Component bacteria were isolated from the several mixed cultures, and it was shown that PVA was utilized symbiotically by t…
Environmental degradation of engineering materials in hydrogen
This book is one volume of the proceedings of the second conference on Environmental Degradation of Engineering Materials held at Virginia Polytechnic Institute on September 21-23, 1981. Papers in this volume describe hydrogen uptake and transport by metals, hydrogen adsorption and evolution from metals and hydrogen e…
Monitoring of optical coatings
Monitoring implies the measurement and control of the parameters of optical thin films during deposition with the object of ensuring the production of an acceptable coating. Monitoring techniques usually concentrate on film thickness as the most important parameter. The principal monitoring arrangements in current use…
Heat capacity and other thermodynamic properties of linear macromolecules. I. Selenium
The heat capacity of selenium from 0 K to 1000 K is reviewed using measurements on 20 samples reported in the literature. A set of recommended data for trigonal, monoclinic, glassy, and molten selenium is derived. Ring-chain equilibrium parameters are critically evaluated. Entropy, enthalpy, and Gibbs energy functions…
A model theory of piezo- and pyroelectricity of poly(vinylidene fluoride) electret
Calculation of piezoelectric constants e 31 and e 33 and pyroelectric constant p 3, of poly(vinylidene fluoride) electret is made on the basis of a model theory in which spheres with the spontaneous polarization Psc are embedded in a matrix. Results are in good agreement with observed values of these constants, respec…
Reactivity of low-coordination sites on the surface of magnesium oxide
Photoluminescent and electron spin resonance studies of MgO smoke powders show that etching of the smoke cubes by water vapour leads to an increase in the number of reactive sites of low coordination on the surface without a parallel increase in the surface area. The formation of anion radicals after adsorption of oxy…
Solid state properties of poly-β-hydroxybutyrate and of its oligomers
The solid state properties of poly-β-hydroxybutyrate (PHB) were investigated for samples with degrees of polymerization [Formula: see text] from 4 to 994. The observed melting points ranged from 47 °C to 180 °C. Electron diffractograms on carefully prepared single crystals of a high molecular weight sample provided da…
Scattering of waves from periodic surfaces
The scattering of waves from periodic surfaces is studied. We give a general review of this problem and compare three analytical methods for a conducting sinusoidal surface in detail for both TE and TM polarized waves. The three methods are: 1) the method developed by Masel, Merrill, and Miller (MMM); 2) the Modified…
Selective Chemical Extraction of Soil Components and Bound Metal Species
I. INTRODUCTION A. Background Soils and sediments are basic components of our environment, as they provide nurture for living matter and serve as "sinks" for deleterious species. The composition of these materials reflects the nature of the original base rock, the degree of degradation and leaching introduced by weath…
Spin-density wave ground state in the one-dimensional conductor (TMTSF) 2PF6: microscopic evidence from 77Se and 1H NMR experiments
The vanishing of the 77Se nuclear resonance signal and the broadening by internal magnetic fields of the proton resonance line establish the existence of spin-density waves in the low temperature semiconducting state of (TMTSF) 2PF6. The thermally activated collective mode of the commensurate spin-density wave contrib…
Cloning of 3-Isopropylmalate Dehydrogenase Gene of an Extreme Thermophile and Partial Purification of the Gene Product
The gene of an extreme thermophile, Thermus thermophilus HB8, which codes for a leucine biosynthetic enzyme, 3-isopropylmalate (3-IPM) dehydrogenase [EC 1.1.1.85], was cloned in Escherichia coli using pBR322 as a vector. E. coli cells carrying this recombinant plasmid, pHB2, produced the thermophilic enzyme 7-fold mor…
Structural studies on the caesium alums, CsM III [SO 4 ] 2 ·12H 2 O
Structure determinations of the caesium alums CsMIII[SO4]2·12H2O, M = V, Cr, Mn, Fe, Co, Al, Ga, or In, have been carried out at 295(1) K by X-ray diffraction methods. The data obtained include (i) MIII–O distances for the metals in the [M(OH2)6]3+ species [V–O, 1.992(6); Cr–O, 1.959(3); Mn–O, 1.991(6); Fe–O, 1.995(4)…
Ionic Conductivity and Thermoelectric Power of Pure and Al2 O 3 ‐ Dispersed AgI
Ionic and electronic conductivities, and thermoelectric power have been measured for AgI and AgI containing a dispersion of submicron size Al 2 O 3 particles. While the dispersion of Al 2 O 3 enhances the ionic conductivity significantly, it does not affect the electronic properties of the matrix. The enhancement is a…
Theory of electrolyte crystal growth. The parabolic rate law
Conference International Conference on Surface and Colloid Science, International Conference on Surface and Colloid Science, ICSCS, Surface and Colloid Science, Fourth, Jerusalem, Israel, 1981-07-05–1981-07-10 Published Online: 2009-01-01 Published in Print: 1981-01-01 © 2013 Walter de Gruyter GmbH, Berlin/Boston
Translational diffusion and hydrodynamic radius of unperturbed flexible chains
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTTranslational diffusion and hydrodynamic radius of unperturbed flexible chainsManfred Schmidt and Walther BurchardCite this: Macromolecules 1981, 14, 1, 210–211Publication Date (Print):January 1, 1981Publication History Published online1 May 2002Published inissue 1 January 1…
Coherent scattering by one reptating chain
We discuss the time dependent correlation functions Sq( t) for one deuterated polymer chain, moving inside an entangled melt of chemically identical, protonated, chains. The region of interest corresponds to wave-vectors q such that D-1 >> q >> R0-1 where D is the tube diameter and R0 the overall chain size. In this r…