Materials Literature
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We performed a complete study of the nucleation and growth kinetics of chemical-vapor-deposition (CVD) diamond on Si(100). The diamond film was grown using the microwave-assisted MWACVD method and the substrate was preliminary pretreated by ultrasonic agitation with 300 μm diamond grains, which provides a high nucleat…
Pavement cells from the leading and trailing edges of the gill filament of Hoplias malabaricus , exhibit a complex system of microridges, a long tight junction and a large number of desmosomes . Pavement cells from the secondary lamellae are smooth surfaced with clearly defined cell boundaries by a circular microridge…
Abstract An attempt was made to simulate carbon gasification with the aid of molecular orbital theory. A simple Hückel method was applied to calculate molecular orbitals of a large polynuclear aromatic molecule, which was employed as a model crystallite for carbon. A free valence at each carbon atom in model crystalli…
Two peaks of glutamine synthetase (GS) activity were resolved by anion-exchange chromatography from the marine diatom Skeletonema costatum Grev. The second peak of activity accounted for greater than 93% of total enzyme activity, and this isoform was purified over 200-fold. Results from denaturing gel electrophoresis…
Abstract Poly(o-aminobenzoic acid) and copolymers of o-aminobenzoic acid and aniline were synthesized as excellent candidates for the precursor of polyaniline. The reaction conditions were optimized with emphasis on the isolated yield. The polymers were characterized by a number of techniques including infrared spectr…
The production of cold shock proteins (csps) and cold acclimation proteins (caps) was characterized in the psychrotrophic bacterium Pseudomonas putida Q5 and its transconjugant P. putida Q5T which contains the toluene-degradative TOL (pWWO) plasmid, using two-dimensional gel electrophoresis and computing scanning lase…
RATIONALE AND OBJECTIVES: A series of studies was conducted to determine whether metal complexes of the EOB-DTPA type are useful as contrast agents for computed tomography (CT). METHODS: Metal complexes using EOB-DTPA as ligand were synthesized with lanthanide metal ions (lanthanum [La], cerium [Ce], praseodyme [Pr],…
The magnetic hyperfine splitting frequencies of (i) $^{57}\mathrm{Ni}$ in Fe ${(}^{57}$NiFe), (ii) $^{57}\mathrm{Ni}$ in Ni ${(}^{57}$NiNi), and (iii) $^{59}\mathrm{Fe}$ in Fe ${(}^{59}$FeFe) were measured with the technique of nuclear magnetic resonance on oriented nuclei (NMR-ON) at low temperatures. The NMR-ON spec…
The three-dimensional structure of the complexes of ribonuclease A with cytidyl-2',5'-adenosine (2',5'-CpA) and deoxycytidyl-3',5'-deoxyadenosine [3',5'-d(CpA)] in aqueous solution has been determined by 1H NMR methods in combination with restrained molecular dynamics calculations. Twenty-three intermolecular NOE cros…
Rare‐earth (R) melilite M(R) and its solid solution M'(R) are investigated. Starting with compositions of R 2 Si 3 O 3 N 4 and R 2 Si 2 AlO 4 N 3 , the formation conditions for M(R), M'(R), and their neighboring phases have been delineated, and their lattice parameters and stoichiometry have been determined. Systemati…
The role of second-order perturbations in interlayer interactions of two-dimensional electronic systems is examined. The general features of interlayer interactions are deduced from a simple two-layer model. The preferred motion is discussed specifically for the stacking of layers in graphite, using a transition-densi…
Abstract Phenol-based dinucleating macrocycles possessing two dissimilar N(amine)2O2 and N(imine)2O2 metal-binding sites, sharing two phenolic oxygens, have been obtained as mononuclear Cu(II) complexes, capable of incorporating a second metal ion to provide homo- and hetero-dinuclear complexes.
In a previous experiment, it was shown that a gas identification sensor using porous silicon necessitated more than 60% concentration for identification. In the present study, it was shown by means of an experiment using water vapor that the concentration limit for gas identification may be controlled by changing the…
Abstract Aqueous suspensions of allophane show relatively high viscosity, presumably because of strong particle interaction between the unit particles. To test this hypothesis, we measured the particle weight and particle size of allophane during a dispersion using the light scattering method. The particle weight was…
The rheological properties of self-assembling fluids are studied within the framework of a simple time-dependent Landau-Ginzburg model. In addition to the Langevin relaxation dynamics, the order parameter field is subject to a kinematic deformation process due to a shear velocity field. The Hamiltonian contains a Gaus…
Results are presented of studies on the low frequency (f' 250 kHz) non-linear dielectric effect on approaching the nematic and smectic A phases in 4′-cyano-4-n-alkylbiphenyls (nCB, for n = 6, 7, 8, 10, 11, 12). In all cases, the mean-field behaviour was valid up to the clearing temperature. In the case of the isotropi…
Crystal data: Na 4 Si 3 Al 3 O 12 Cl, cubic, space group P 43 n , Z = 2, F (000) = 233.06 fm, μ n = 0.06 cm −1 , lattice parameter a o (Å) [ T ] (K) at eight temperatures: 8.882 (1) [295]; 8.902 (2) [500]; 8.912 (1) [600]; 8.923 (1) [700] 8.951 (2) [800]; 8.971(1) [900]; 8.988 (1) [1000]; 9.037 (1) [1200]. The crystal…
Using the exact charge density of intrinsic point defects of metal oxides (MOs), the phenomenological electron theory of chemisorption, developed by Volkenstein, is applied to acceptorlike and donorlike chemisorption on MO thin films for the whole ξ region (where ξ=D/LD, D is the film thickness, and LD is Debye length…
The double-differential cross section for inner-shell ionization in a crystal by fast electrons is calculated within the theory of dynamical electron diffraction. Bloch waves are used for the incident and the emerging electrons. We show that interference terms are still present in the independent Bloch-wave model. In…
▪ Abstract The phase-field method has recently emerged as a powerful computational approach to modeling and predicting mesoscale morphological and microstructure evolution in materials. It describes a microstructure using a set of conserved and ...Read More