Materials Literature
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A previously reported multiconfiguration self-consistent field (MCSCF) algorithm based on the generalized Brillouin’s theorem is extended in order to treat excited states of polar molecules. In particular, the algorithm takes into account the proper treatment of nonorthogonality in the space of single excitations and…
We report observations on the alignment of nematic liquid crystals on surfaces of obliquely deposited silicon monoxide, with and without additional treatment with surfactant. The liquid crystals reported on are 4.4-dihexylazoxybenzene and 4-heptyl-4’-cyanobipheny. The surfactants used are N,N-dimethyl-N-octadecyl-3-am…
The scattering properties of dielectric gratings having asymmetric triangular profiles are determined by a simple approach that views the grating structure as a double set of parallel planes. The energy of an incident surface wave is then scattered in preferential directions that are consistent with the grating period…
A 1975 treatment of single-double multiple scattering of electrons by randomly oriented vapor-phase molecules is put on a firmer footing and extended to higher order. It is shown how to include effects of intramolecular Fresnel diffraction, as an electron scattered by one atom propagates to the next, without ever expl…
A molecular dynamics study of the glass forming properties of the inverse-twelfth-power soft-sphere model is reported. MD results in the equilibrium range for N=4000 are used to parametrize a six-term virial equation for the fluid and a three term anharmonic perturbation equation-of-state for the crystal, and thereby…
Using a dynamic Monte Carlo method we investigated the thermodynamics of static and time-dependent properties of the freely jointed polymer chain with Lennard-Jones type intramolecular forces. The Θ temperture is calculated to kBΘ/−=3.70±0.01 (− is the Lennard-Jones energy parameter). We give estimates for the equilib…
Raman spectra have been recorded for solids and melts of composition MgCl 2 + nACl (n = 0–4 and A = Cs, Rb, K, Na, Li). Characteristic spectra have been observed for each of the solids predicted from phase diagram studies and an additional two compounds formulated as Rb 3 MgCl 5 and K 3 MgCl 5 were detected. The compo…
Raman and infrared spectra on well-staged graphite-Al${\mathrm{Cl}}_{3}$ are reported for compounds with stages $n=1, 2, 4, \mathrm{and} 8$. Of significance is the absence of infrared-active modes for stage-1 graphite-Al${\mathrm{Cl}}_{3}$ and the presence in stages 2, 4, and 8 of three infrared-active modes in the vi…
1. The effects of various concentrations of ascorbic acid on the quality and quantity of the insoluble extracellular matrices produced by two strains of cultured rat smooth-muscle cells were studied. 2. Ascorbic acid was necessary for the appearance of insoluble collagen in the extracellular matrix. 3. Secretion of so…
The magnetoreflection technique is applied to study Landau-level transitions in graphite under pressures up to 2 kbar to provide detailed information on the pressure dependence of the graphite electronic structure. In this pressure range the magnetoreflection spectra can be explained in terms of the Slonczewski-Weiss-…
The temperature dependence of the paramagnetic shifts in square planar ferrous complexes has been investigated for a number of porphyrin derivatives. Large anomalies in the Curie law have been observed in newly synthesized substituted tetraphenylporphins in which the environment of both faces of the tetrapyrrolic ring…
The interaction between two 4f electrons in a rare-earth ion by means of the polarization of a ligand in a solid is discussed. It is shown that this interaction gives rise to a host dependent shift of the energy separations between the 4f N and 4f N−1 nl configurations. The results of the theory of these energy shifts…
The structure and stability of metallic glasses and the relationship between the constitution diagram and glass formation in binary alloy systems is discussed on a quantum-mechanical basis. An ab initio pseudopotential method is used to calculate the interatomic forces in transition-metal-free glass-forming alloys. Th…
Single crystals of triglycine sulphate (TGS) doped with o-, p- and m-nitroanilines and L-alanine have been grown by the method of temperature lowering. Their dielectric permittivity and electrical conductivity have been studied as a function of temperature. The observed increase in the Curie temperature due to p-nitro…
A formula for discharge current flowing in a space charge filled gap is derived for a general geometry of electrodes from the energy balance equation in which the displacement current caused by the motion of the charged particles in the gap is taken into account. It is found that in the formula obtained the influence…
The eddy current drag on a moving domain wall is proportional, not to the instantaneous wall velocity, but to a moving average of its recent velocities. Thus an oscillating domain wall experiences an eddy force component in quadrature with its velocity that may formally be attributed to a negative effective 'eddy mass…
The electronic structure of the transition metal dichalcogenide layer compounds is studied using hybridised orbitals appropriate to the transition metal atom coordination. Non-bonding orbitals on the transition metal atoms give the conduction electron bands which are responsible for the charge-density-wave phase trans…
With the use of crossed beams of electrons and multiply charged argons ions, dominant contributions (above 90%) of $L$-shell ionization to multiple ionization of ${\mathrm{Ar}}^{i+}$ ions ($i=1, 2, 3$) at electron energies below 800 eV are identified. The observed contributions are explained in terms of the electron r…
Propylene glycol alginates give greater increases in foam stability than are given by equal amounts of neutral polysaccharides. This is due to electrostatic interaction between carboxyl groups on the glycol alginate molecules and amino groups on the peptides in the bubble wall. This interaction within the bubble wall…
硫酸アンモニウム融解法の酸化アルミニウム,酸化チタン(IV)及び酸化ニオブ(V)への適用性を検討した.酸化アルミニウム,酸化チタソ(IV)及び酸化ニオブ(V)に対し融剤量は,それぞれ,20倍,20倍,10倍,融解時間は2時間,1時間,1時間,融解温度は400℃,450℃,400℃の条件で融解を行った結果,酸化アルミニウム,酸化チタン(IV),酸化ニオブ(V)の回収率はそれぞれ(99.2±0.4)%,(100.1±0.2)%,(100.1±0.2)%であった.この結果より,これら酸化物は定量的に分解回収されていることが明らかとなった.