Materials Literature
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The ability of the regolith to adsorb and retard radioactive and other noxious chemicals is important when selecting repository sites. Because of its surface charge and great specific surface, the clay in soil contributes significantly to this retardation. This paper illustrates a novel analysis of unsteady water and…
A new method for quantitatively evaluating the alignment degree of sintered Nd-Fe-B magnets by x-ray diffraction spectra has been proposed. It has been experimentally revealed that the strong (105) reflection existing in almost all x-ray diffraction spectra of sintered Nd-Fe-B magnets stems from the misalignment grain…
Abstract Calcium‐carbonate‐filled linear low‐density polyethylene (LLDPE) films play an important role in the hygienics market because these materials allow for the diffusion of water vapor (breathability) and retain a liquid barrier while providing a barrier to liquids. This is achieved when properly formulated compo…
Fatty acids and polyketides are synthesized by mechanistically and evolutionarily related multienzyme systems. Their carbon chain backbones are synthesized via repeated decarboxylative condensations of alpha-carboxylated building blocks onto a growing acyl chain. These alpha-carboxylated building blocks are transferre…
The impact of land use change from grassland to conifer forest on the aluminium (Al) concentrations in soils and soil solutions was examined. Soils from grassland were compared with those from adjoining 15–19-year old forest stands at 3 contrasting pairs of sites in South Island, New Zealand. The site pairs were on a…
Abstract Values of the effective interaction parameter (χ) between regular, long‐branched polystyrene chains and their linear analogues were measured with small‐angle neutron scattering for several star‐branched chains and one comb‐type polymer. The contribution to this interaction due to architecture alone increases…
This review is devoted to hybrid materials made of organic quadratic nonlinear optical (NLO) chromophores embodied in various inorganic environments. In the first section are reported systems in which the inorganic moiety is a transparent mineral network (e.g., silica, zirconium phosphate, etc.) exhibiting good transp…
Abstract Two kinds of flame‐retardant polymers prepared from the phosphorylation of poly(vinyl acetate) were employed to reduce the flammability of polypropylene (PP). The two flame‐retardant polymers had very different effects because of the differences in their chemical structure. Effects on flame retardancy, therma…
Bulk ZnO single crystals grown by the hydrothermal and flux methods have been characterized by steady-state and time resolved cathodoluminescence measurements performed on the different crystalline faces. A shift of the peak near band edge towards lower energies is observed in spectra recorded with increasing delay ti…
After a general survey of the fundamental characteristics of heterogeneous photocatalysis, the present article classifies the ensemble of reactions into three major categories: i) mild oxidations, ii) total oxidations, and iii) reactions involving hydrogen. Depending on the presence or absence of H2O, the active oxidi…
The kinetic modeling of hydrogen reduction was studied with the use of experimental data obtained by temperature-programmed method. The reduction of a CrO x /γ-Al 2 O 3 catalyst prepared by atomic layer deposition (ALD) was used as the test reaction. Reduction kinetic models reported in the literature were evaluated b…
We have investigated the effect of molecular adsorbates on the ultrafast electron dynamics in nanoshell particles. These nanoparticles consist of a thin gold shell surrounding a gold sulfide core. Pump−probe transmission measurements at 1.5 eV on unmodified nanoshells in aqueous solution yield an electron relaxation l…
Systematic uniaxial strain studies of $\ensuremath{\alpha}\ensuremath{-}{(\mathrm{B}\mathrm{E}\mathrm{D}\mathrm{T}\ensuremath{-}\mathrm{T}\mathrm{T}\mathrm{F})}_{2}M{\mathrm{Hg}(\mathrm{SCN})}_{4}$ $(M={\mathrm{K},\mathrm{N}\mathrm{H}}_{4})$ have been carried out. By controlling the in-plane lattice parameters a and c…
Abstract D,L ‐Lactic acid (DLLA) was polycondensed with 4‐hydroxycinnamic acid (4HCA), a derivative of cinnamic acid, to prepare a novel functional biodegradable polymer. The polymer was prepared using two different methods, the solvent method, which used acetic anhydride as the solvent, and the direct method. White a…
The two molecular triads 1a and 1b consisting of a porphyrin (P) covalently linked to a fullerene (C60) electron acceptor and tetrathiafulvalene (TTF) electron-donor moiety were synthesized, and their photochemical properties were determined by transient absorption and emission techniques. Excitation of the free-base-…
The evolution with x of the complex phase diagram below 310 K of ${\mathrm{La}}_{1\ensuremath{-}x}{\mathrm{Sr}}_{x}{\mathrm{MnO}}_{3}$ in the range $0<~x<~0.35$ has been mapped out with measurements on a series of melt-grown samples of resistivity $\ensuremath{\rho}(T),$ specific heat ${C}_{p}(T),$ magnetization…
Hydroxyl organofunctional silicone solutions were prepared by acid-catalyzed hydrolysis and condensation of tetraalkoxysilanes, alkoxysilane modified organic compounds, and hydroxyl functional trialkoxysilanes or epoxy functional silanes. These silicone solutions were mixed with methoxylated urea formaldehyde and meth…
Structural and electrical transport properties of half-Heusler ${\mathrm{Fe}}_{1\ensuremath{-}x}{\mathrm{Ni}}_{x}\mathrm{TiSb}$ solid solutions have been investigated using x-ray diffraction, ${}^{57}\mathrm{Fe}$ M\"ossbauer spectroscopy, resistivity, and thermopower measurements. The electronic structure of the compo…
Summary In this study we have shown that cellulose fibres can be coated with regular micron-sized particles by controlling the assembly process of xylans on the cellulose surfaces. When cotton linters were exposed to a 5% water solution of xylan from birchwood at 110°C, 2 h, pH 8, the substrates showed an increase in…
The discharge behaviour in short metallic-dielectric electrode gaps in air at atmospheric pressure is examined as a function of the surface charge density on a dielectric anode. The charge distribution is assumed to be Gaussian and calculations are carried out using a two-dimensional model with rotational symmetry. Di…