Materials Literature
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The appearance of a toroidal moment is observed in the magnetoelectric Cr 2 O 3 in a strong magnetic field above the spin-flop transition field. This conclusion is based on the experimentally established fact that the off-diagonal components of the magnetoelectric susceptibility tensor of Cr 2 O 3 contains an antisymm…
Oxygen adsorption in an ordered $p(1\ifmmode\times\else\texttimes\fi{}1)$ fashion on the Fe(001) surface has been studied by empty states spectroscopies using a spin-polarized electron beam. The low-energy electron absorption and reflection display a much larger spin dependence in Fe(001)-$p(1\ifmmode\times\else\textt…
The reactivities of four hydratable aluminas were investigated. Rates of heat liberation during hydration from 15° to 55°C were determined by isothermal calorimetry. Rates of heat evolution show two peaks. An initial mixing peak is due to wetting and initial dissolution reactions. A second, main heat peak is associate…
Using inelastic neutron scattering, we have measured a range of amorphous forms of ice, including high-density and low-density amorphous ices, in the energy transfer region from 2 to 500 meV (16--4033 ${\mathrm{cm}}^{\mathrm{\ensuremath{-}}1}$). The measured spectra show that the pressure-produced high-density amorpho…
Photoelectrochemical characterization of semiconducting diamond was carried out in a weakly UV‐absorbing aqueous electrolyte using suprabandgap illumination in order to examine the influence of electrochemical oxidative surface treatment on the energetic positions of bandedges. Anodic treatment of diamond photoelectro…
This paper reports the first single-crystal Raman spectra of substituted barium hexaferrites, BaFe12−2x MexCoxO19 (Me=Ir, Ti). The spectra were investigated in the 200–900 cm−1 range and are discussed in comparison with unsubstituted barium hexaferrite. Emphasis was placed on the different factors influencing the Rama…
We evaluated the relaxation enhancement and biodistribution of short- vs. long-circulating magnetoliposomes as a new contrast agent for magnetic resonance (MR) imaging of bone marrow. Magnetoliposomes with (ML-PEG) and without (ML) incorporation of polyethylene glycol (PEG, Mw 2000) were prepared, measuring 40 nm in d…
The thermodynamics and kinetics of the magnetic states of the semiconductor-like compound La0.7Sr0.3Mn0.7Co0.3O3 were studied by detailed magnetic measurements. The spontaneous magnetic state was found to be a cluster-glass phase which can cross over to a ferromagnetic state under an external magnetic field H. The def…
The effects of displacive, heavy-ion irradiation on the properties of synthetic single-crystals of ${\mathrm{ZrSiO}}_{4}$ (zircon), ${\mathrm{HfSiO}}_{4}$ (hafnon), tetragonal ${\mathrm{ThSiO}}_{4}$ (thorite), and monoclinic ${\mathrm{ThSiO}}_{4}$ (huttonite) have been investigated. All four $\mathrm{AB}{\mathrm{O}}_{…
Samples of Cu–Zn ferrites doped with different rare earth ions (La, Sm, Nd, Gd, and Dy) are investigated. X-ray diffraction patterns indicated the presence of a single spinel phase. The lattice parameter is found to be nearly independent of the doped rare earth ion type. The density is measured and the porosity is cal…
1. The objectives of the present work were: (a) to evaluate the effects of the development and the presence of a photosynthetically active algal biofilm on chemical fluxes and processes at the sediment–water interface; (b) to measure the effects of the biofilm on chemical concentration gradients in the bulk sediment;…
Biosynthesis of pyridoxal 5'-phosphate (PLP) depends upon the relatively specific action of two consecutive enzymes, viz. pyridoxal (pyridoxine, pyridoxamine) kinase and pyridoxine (pyridoxamine) phosphate oxidase. Less specific phosphatases catalyze hydrolyses of the 5'-phosphates of the vitamers pyridoxal, pyridoxam…
Abstract The development of high performance composites from a cheap natural fiber, jute, as reinforcement is particularly significant from an economic point of view. In this work, jute fiber‐unsaturated polyester(GP) composites having appreciable mechanical properties were prepared by using solution impregnation and…
Single crystal films of 4′-dimethylamino-N-methyl-4-stilbazolium tosylate (DAST) with excellent optical quality have been prepared by modified shear method. Electro-optic modulation for light propagating perpendicular to the film surface was measured at a wavelength (720 nm) where absorption is small. Very large elect…
Films of blends of microbial poly(3-hydroxybutyric acid) (PHB) with α-chitin and chitosan were prepared as completely biodegradable polyester-polysaccharide composites. DSC revealed that the crystallization of PHB in these blends is suppressed when the proportion of the polysaccharide is increased. The same tendency w…
The origin of the appearance of the morphotropic phase boundary in perovskite-type oxide solid solution systems is clarified on the basis of a Landau-type free-energy function expressed in terms of polarization and strain components. The dielectric susceptibilities and piezoelectric constants are shown to increase in…
A spin crossover transition (350 K, μeff=3.15 μB per Co atom; 4.5 K, μeff=0.70 μB per Co atom) and weak antiferromagnetic exchange (2 J=−11.7 cm−1) between the octahedral, doubly pyridazine bridged cobalt(II) ions are features of the structurally characterized complex [CoII2L(NCS)2(SCN)2] (the ligand L is shown).
Protein crystals have been cross-linked by a gentle technique whereby glutaraldehyde is introduced by vapor diffusion into the crystallization droplet containing the crystals. Diffraction analyses of crystals of three different proteins show that cross-linking prevents, in a large part, the lattice disorder normally o…
In this paper we discuss the nonequilibrium shear viscosity of a suspension of hard spheres that is modeled by neglecting hydrodynamic interactions in a consistent way. The aim is to establish the true capabilities of this model in predicting the properties of real suspensions. A Brownian dynamics algorithm is used to…
Article Nanoparticles and Nanostructured Films, Preparation, Characterization and Applications was published on February 1, 1999 in the journal Zeitschrift für Physikalische Chemie (volume 213, issue 2).