Materials Literature
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Six series of laterally fluorinated liquid crystals containing 1,3,2-dioxaborinane and cyclohexyl units have been synthesized and characterized. Their mesomorphic properties were characterized by polarizing optical microscopy and differential scanning calorimetry. All these compounds are thermotropic liquid crystallin…
Abstract The texture of ordered phases of block copolymer melts and gels is highly sensitive to shear. In the body‐centered‐cubic phase of a block copolymer system [polystyrene–poly(ethylene butylene)–polystyrene] mixed with oil, we show how a given textures can be controlled with the application of a specific shear r…
The reaction of the trimetallic species [Fe(3)O(PhCOO)(6)(H(2)O)(3)]NO(3) with 1,1,1-tris(hydroxymethyl)ethane (H(3)thme) affords either the octametallic species [Fe(8)(PhCOO)(12)(thme)(4)] 1 or the hexadecametallic species [Fe(16)(EtO)(4)(PhCOO)(16)(Hthme)(12)](NO(3))(4) 2, depending on the nature of the solvent used…
The reversible dephosphorylation of beta-aspartyl phosphate to L-aspartate-beta-semialdehyde (ASA) in the aspartate biosynthetic pathway is catalyzed by aspartate-beta-semialdehyde dehydrogenase (ASADH). The product of this reaction is a key intermediate in the biosynthesis of diaminopimelic acid, an integral componen…
The present investigation is a part of a series on metal hydrides with extraordinary short $\mathrm{H}\mathrm{H}$ separations. The electronic structure, chemical bonding, and ground state properties of $RT\mathrm{In}$ $(R=\mathrm{La},\phantom{\rule{0.3em}{0ex}}\mathrm{Ce},\phantom{\rule{0.3em}{0ex}}\mathrm{Pr},\phant…
Magnetic order has been investigated in stripe-ordered ${\mathrm{La}}_{2\ensuremath{-}x}{\mathrm{Sr}}_{x}{\mathrm{NiO}}_{4}$ $(x=0.275,0.37,0.4)$ by dc magnetization and by polarized- and unpolarized-neutron diffraction. In the magnetically ordered phase, all three compositions exhibit a magnetic transition consistent…
Photoemission spectroscopy demonstrates the formation of a surface gold nitride upon irradiation of a $\mathrm{Au}(110)$ surface with $500\phantom{\rule{0.3em}{0ex}}\mathrm{eV}$ nitrogen ions at room temperature. After irradiation two $\mathrm{N}1s$ peaks are observed at binding energies of $396.7\ifmmode\pm\else\text…
catena-Poly[[aqualanthanum(III)]-μ-(8-carboxyoctanoato)-μ-octanedioato], [La(C8H12O4)(C8H13O4)(H2O)]n, is, to our knowledge, the first reported rare-earth complex containing a flexible long-chain ligand that crystallizes without water of crystallization. The layered polymeric structure is built from infinite chains…
This work illustrates the design, manufacturing and tensile testing of a novel concept of honeycomb structure made of shape memory alloy (SMA) core material. The honeycomb is manufactured using SMA Nitinol ribbons inserted in a special dye and using cyanoacrilate to bond the longitudinal strips of the unit cells. Anal…
Succeeding in getting a protein to crystallize is not always the final hurdle in the determination of its three-dimensional structure. A relatively frequent and particularly vexing situation is the production of macroscopically well formed crystals that exhibit no suitable diffraction pattern. In this paper, three ind…
The process by which spiders make their mechanically superior fiber involves removal of solvent (water) from a concentrated protein solution while the solution flows through a progressively narrowing spinning canal. Our aim was to determine a possible mechanism of spider water removal by using a computational model. T…
The effect of curling hair with a curling iron has been investigated. Possibilities of thermal damage with repeated curling according to, and in violation of, the manufacturer's specifications have been studied. The propensity of hair surface to damage depends on the moisture content of the hair, and these experiments…
PURPOSE: To investigate the influence of storage conditions and types of plasticizers on the properties and stability of ethylcellulose and polymethacrylate films and to elucidate the mechanism for the changes observed. METHODS: Films were prepared from Surelease, Aquacoat and Eudragit L 30D dispersions by the casting…
A neutron diffraction study has been carried out at 1.6 A resolution on a mutant rubredoxin from Pyrococcus furiosus using the BIX-3 single-crystal diffractometer at the JRR-3 reactor of the Japan Atomic Energy Research Institute. In order to study the unusual thermostability of rubredoxin from P. furiosus (an organis…
ADVERTISEMENT RETURN TO ISSUEPREVCommunication to the...Communication to the EditorNEXTOne-Pot Synthesis of Amphiphilic Core−Shell Suprabranched MacromoleculesYouyong Xu, Chao Gao, Hao Kong, Deyue Yan, Ping Luo, Wenwen Li, and Yiyong MaiView Author Information College of Chemistry and Chemical Engineering, Shanghai Ji…
Using the x-ray diffraction and x-ray absorption fine structure techniques, we have probed $\mathrm{Ti}$, $\mathrm{Ta}$, and $\mathrm{Sc}$ local environments in the solid solution system $(1\ensuremath{-}x{)\mathrm{Pb}(\mathrm{Sc},\mathrm{Ta})\mathrm{O}}_{3}\text{\ensuremath{-}}x{\mathrm{PbTiO}}_{3}$. This system is k…
diameter = 5 nm) were partially displaced by (2-mercapto-propionylamino) acetic acid 2,5-dioxo-pyrrolidin-1-ylesters via ligand exchange, and the succinimide-terminated silver particles were bound to amine-labeled Dextran 3000 (1 amine/per chain) or Dextran 10 000 (2.5 amine/per chain), respectively. The particle-Dext…
Magnetization-angle dependence of the magnetic dipole is extensively studied for bulk, surface, and overlayer systems by using first-principles electronic structure calculations. In most transition-metal ferromagnets, the magnetic dipole is described well in a weak spin-orbit-interaction (SOI) regime with the angle de…
The Zone Melt Crystal Growth Method (FSZM) has been used to produce polycrystalline Galfenol specimens, Fe<sub>81.6</sub>Ga<sub>18.4</sub>, with preferred {100} orientation. This crystal growth technique has advantages over conventional Bridgman methods in that zone rates used were at least an order of magnitude great…
A Zn,Al layered double hydroxide (LDH) with Zn/Al = 1.45 and containing nitrate anions was prepared by coprecipitation and characterized by powder X-ray diffraction, Zn K-edge extended X-ray absorption fine structure spectroscopy (EXAFS), thermogravimetric analysis, FTIR and FT Raman spectroscopy, and (27)Al MAS NMR s…