Materials Literature
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In an attempt to potentiate the therapeutic index of cytokines, recombinant mouse granulocyte/macrophage colony-stimulating factor (GM-CSF) and recombinant human tumor necrosis factor alpha (TNF-alpha) were encapsulated in large (0.3-2.2 microns) multilamellar vesicles composed of various lipids, using several encapsu…
Under typical growth conditions, strain levels greater than or equal to 10−4 are shown to influence thin film surface morphology and strain relaxation pathways. Misfit and threading dislocations in relaxed heterostructures produce long wavelength undulations on the surface and shallow depressions, respectively. Thread…
A new probe using a lumped constant resonator for the scanning nonlinear dielectric microscope has been developed. This probe has sufficient resolution to observe the area distribution of ferroelectric polarization. Using this probe, the distributions of the domains in the thin film of a copolymer of vinylidene fluori…
Abstract The 24 title compounds were prepared in well crystallized form by reaction of the rare earth elements (or uranium, respectively), manganese, the pnictide components, and MnO 2 in a NaCl/KCl flux. They crystallize with the tetragonal ZrCuSiAs type structure (P4/nmm, Z = 2), which has been refined from single-c…
ZnO thin films were deposited on a R-plane sapphire substrate. The effects of the thermal energy and the kinetic energy of the sputtered species on the growth of ZnO thin films were investigated. By varying the substrate temperature, chamber pressure, and radio frequency power, the structure of ZnO thin films was tran…
ADVERTISEMENT RETURN TO ISSUEPREVCommunication to the...Communication to the EditorNEXTPolydendron: Polymerization of Dendritic Phenylacetylene MonomersTakashi Kaneko, Takahiro Horie, Motohiro Asano, Toshiki Aoki, and Eizo OikawaView Author Information Graduate School of Science and Technology, Niigata University, Ika…
The Escherichia coli panD gene, encoding l-aspartate-alpha-decarboxylase, was cloned by PCR, and shown to complement a panD mutant defective in beta-alanine biosynthesis. Aspartate decarboxylase is a pyruvoyl-dependent enzyme, and is synthesized initially as an inactive proenzyme (the pi-protein), which is proteolytic…
Movement of magma within the Earth depends upon the density, compressibility, thermal expansion, viscosity, diffusivity, heat capacity, and thermal conductivity of silicate melts as a function of temperature, pressure, and composition. These physical properties are controlled by the atomic coordination and bond streng…
The insulin hexamer is an allosteric protein capable of undergoing transitions between three conformational states: T6, T3R3, and R6. These transitions are mediated by the binding of phenolic compounds to the R-state subunits, which provide positive homotropic effects, and by the coordination of anions to the bound me…
We propose a new simulation scheme to describe polymer dynamics at interfaces. Using this scheme, we studied adsorption dynamics in a polymer solution. We calculated the evolution of the density profiles and the polymer conformation. The numerical results are qualitatively consistent with recent experimental observati…
The temperature variation of the (100) and (010) neutron diffraction peak intensities, related only to the Nd magnetic moments, have been measured on a ${\mathrm{NdFeO}}_{3}$ single crystal, at temperatures down to 70 mK. The (100) peak becomes noticeable below 25 K while the (010) peak only gives an appreciable contr…
Two new iron(II) compounds with the formula [Fe(3)(iptrz)(6)(H(2)O)(6)]X(6).xH(2)O (with iptrz = 4-isopropyl-1,2,4-triazole and X = p-toluenesulfonate (Tos) or trifluoromethanesulfonate (Trifl)) were synthesized. The crystal structure of [Fe(3)(iptrz)(6)(H(2)O)(6)](Tos)(6).2H(2)O (I) has been solved at room temperatur…
Using confocal microscopy, we have studied the morphology of polymer dispersed liquid crystals (PDLC) as a function of polymer/liquid crystal composition, polymer cure temperature, and ultraviolet (UV) curing power and determined how this morphology affects the electro-optical properties. The PDLC morphology consists…
Exchange of D 2 with the OH groups of several oxides was carried out on the samples on which we investigated the 18 O 2 / 16 OH exchange (part I, J. Phys. Chem. 1996, 100, 9429). Temperature-programmed isotopic exchange was first carried out on the bare oxides. In every case, the reaction follows a simple heteroexchan…
Chemical bonding and local order around the different atoms of thick amorphous SiCxNy deposits [0.03⩽x/(x+y)⩽0.67] prepared with chemical vapor deposition at 1000–1200 °C using TMS–NH3–H2 have been investigated using x-ray photoelectron spectroscopy (XPS), Raman spectrometry, Fourier transform infrared spectrometry (F…
We have created self-assembled disk-like aggregates of predictable stoichiometry which form discotic liquid crystalline phases. Attempts to assemble multiple molecules of one compound radially about a second acting as a template failed, presumably owing to the existence of a stable crystalline phase of the template. T…
Bioartificial polymeric materials represent a new class of polymeric materials based on blends of synthetic and natural polymers, designed with the purpose of producing new materials with enhanced properties with respect to the single components. The mechanical properties of bioartificial materials prepared using poly…
We have investigated the appearance of ferromagnetism in a mixture of nonferromagnets ${\mathrm{LaMnO}}_{3}$ and ${\mathrm{LaCoO}}_{3}$, without heterovalent ion substitution in La sites. ${\mathrm{LaMn}}_{0.85}$${\mathrm{Co}}_{0.15}$${\mathrm{O}}_{3}$ and ${\mathrm{La}}_{0.7}$${\mathrm{Sr}}_{0.3}$${\mathrm{Mn}}_{0.8}…
Stable colloidal suspensions of rodlike cellulose crystallites, prepared by acid hydrolysis of cellulose fibers, form a chiral nematic phase above a critical concentration. The direction of the chiral nematic axis may be controlled by applying a strong magnetic field. In the presence of Congo red, a dye with strong af…
γ‐Al 2 O 3 is a defective spinel phase of alumina with cation site vacancies randomly distributed. Its structure and properties are not well understood. There has been long‐standing controversy as to whether the cation vacancies are located at the tetrahedral sites or the octahedral sites. Based on an empirical pair p…