Materials Literature
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The Class I and III polyhydroxybutyrate (PHB) synthases from Ralstonia eutropha and Chromatium vinosum, respectively, catalyze the polymerization of beta-hydroxybutyryl-coenzyme A (HBCoA) to generate PHB. These synthases have different molecular weights, subunit composition, and kinetic properties. Recent studies with…
Oxygen-isotope effects on the intrinsic resistivity have been studied in high-quality epitaxial thin films of ${\mathrm{La}}_{0.75}{\mathrm{Ca}}_{0.25}{\mathrm{MnO}}_{3}$ and ${\mathrm{Nd}}_{0.7}{\mathrm{Sr}}_{0.3}{\mathrm{MnO}}_{3}.$ We found that the residual resistivity ${\ensuremath{\rho}}_{o}$ increases by about…
ADVERTISEMENT RETURN TO ISSUEPREVNoteMolecular Weight Dependence of Alternate Adsorption through Charge-Transfer InteractionYuzuru Shimazaki, Ryo Nakamura, Shinzaburo Ito, and Masahide YamamotoView Author Information Department of Polymer Chemistry, Graduate School of Engineering, Kyoto University, Sakyo, Kyoto 606-85…
The effects of Cr substitution on Mn sites in the colossal magnetoresistance (CMR) compound ${\mathrm{La}}_{0.67}{\mathrm{Ca}}_{0.33}{\mathrm{MnO}}_{3}$ have been studied by preparing the series ${\mathrm{La}}_{0.67}{\mathrm{Ca}}_{0.33}{\mathrm{Mn}}_{1\ensuremath{-}x}{\mathrm{Cr}}_{x}{\mathrm{O}}_{3} (x<~0.3).$ A c…
Electronic transport in gold−dithiol nanoparticle films was studied using conductivity, photoconductivity, and photoelectrochemical means. The films were characterized by SEM and optical spectroscopy. GC/MS was used for the analysis of the pyrolysis products during heat treatment. Films were assembled on glass substra…
The behaviour of the Random Anisotropy Ising model at T=0 under local relaxation dynamics is studied. The model includes a dominant ferromagnetic interaction and assumes an infinite anisotropy at each site along local anisotropy axes which are randomly aligned. Two different random distributions of anisotropy axes hav…
We report a detailed experimental and theoretical investigation of the effect of residual strain and strain relaxation, which manifests itself at the ${\mathrm{S}\mathrm{i}/\mathrm{S}\mathrm{i}\mathrm{O}}_{2}$ interfaces in commercial silicon-on-insulator (SOI) wafers. SOI material is made of a single-crystal silicon…
The ability to create thin films of highly oriented anisotropic nanoparticles of transition metal oxides onto polycrystalline and single-crystalline substrates is demonstrated by the fabrication of large three-dimensional arrays of perpendicularly oriented nanorods of crystalline iron(III) oxides onto tin oxide and sa…
A new application of MCM-41 mesoporous materials has been developed. Two kinds of surfactants, C16TAB and C12TAB, have been employed to get different pore sizes. The samples were disk-shaped conformed before and after charging with ibuprofen, an anti-inflammatory drug. In all the cases the weight percent ratio of drug…
Earthmoving, mining, and minerals processing each involve frequent, and often severe, mechanical interactions between metals, and between metals and abrasive nonmetallic and metallic materials (i.e., mineral bearing ores). The abrasive nature of ores causes significant wear to extracting, handling, and processing equi…
A thorough understanding and analysis of geometry and topology of three-dimensional fiber networks from high resolution images is an important and challenging task due to the enormous complexity and randomness of the structure. In this paper we propose a technique that is aimed at structural analysis of fiber mats, bo…
Earthmoving, mining, and minerals processing each involve frequent, and often severe, mechanical interactions between metals, and between metals and abrasive nonmetallic and metallic materials (i.e., mineral bearing ores). The abrasive nature of ores causes significant wear to extracting, handling, and processing equi…
A series of polyurethaneurea-vinyl polymer (PUA) hybrid aqueous dispersions were synthesized from castor oil and/or difunctional poly(oxypropylene) polyol (GE-210, M(n) = 1000), butyl acrylate, and styrene. The effect of hybrid between the polyurethaneurea (PUU) and vinyl polymer (PA) on the morphologies and the mecha…
The bond valence technique has been applied on reverse Monte Carlo produced structural models of Ag-based superionic glasses and crystals. The results for the ${(\mathrm{AgI})}_{0.75}{\ensuremath{-}(\mathrm{A}\mathrm{g}}_{2}{\mathrm{MoO}}_{4}{)}_{0.25}$ and ${(\mathrm{AgI})}_{0.6}{\ensuremath{-}(\mathrm{A}\mathrm{g}}_…
Using the effective-medium approximation (EMA), which is valid for densely and randomly distributed particle composites, we have investigated optical properties of a dense carbon nanotube system, in which the nanotubes are parallel in orientation but random in position. The morphologies of both the Maxwell-Garnett the…
Analysis of native poly(3-hydroxybutyrate-co-3-hydroxyhexanoate) [P(3HB-co-3HHx)] inclusions from Aeromonas caviae FA440 revealed that ORF1 (a 348-bp gene located immediately upstream of phaC(Ac)) encodes a 13-kDa granule-associated protein, which was referred to as phaP(Ac). Several recombinant strains of A. caviae w…
Two novel macromolecular MRI contrast agents based upon generation-6 polyamidoamine dendrimers (G6) of presumed similar molecular size, but of different molecular weight, were compared in terms of their blood retention, tissue distribution, and renal excretion. Two G6s with either ammonia core (G6A) or with ethylenedi…
ADVERTISEMENT RETURN TO ISSUEPREVNoteInvestigation on the Solubilization Locus of Aniline-HCl Salt in SDS Micelles with 1H NMR SpectroscopyByoung-Jin Kim, Seung-Soon Im, and Seong-Geun OhView Author Information Division of Chemical Engineering, Hanyang University, Sungdong-Gu Haengdang-dong 17, Seoul 133-791, Korea Ci…
Unipolar devices constructed from ferromagnetic semiconducting materials with variable magnetization direction are shown theoretically to behave very similarly to nonmagnetic bipolar devices such as the p-n diode and the bipolar (junction) transistor. Such devices may be applicable for magnetic sensing, nonvolatile me…
The electronic properties of thin films present quantum-size effects, which are a consequence of the finite size of the system. Here we focus on the investigation of these effects on the electronic energy loss of charged particles moving parallel with thin metallic films. The energy loss is calculated, within linear-r…