Materials Literature
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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…
In the present study, a comprehensive mathematical model is developed to analyze the effects of initial catalyst size, active site concentration, catalyst morphology (e.g., porosity, extent of prepolymerization, etc.), and hydrodynamic conditions on the growth and overheating of highly active Ziegler−Natta catalyst pa…
The hyperthermophilic Archaea Sulfolobus solfataricus grows optimally above 80 degrees C and metabolizes glucose by a non-phosphorylative variant of the Entner-Doudoroff pathway. In this pathway glucose dehydrogenase and gluconate dehydratase catalyze the oxidation of glucose to gluconate and the subsequent dehydratio…
The magnetism and transport properties of heavily doped perovskite ${\mathrm{LaMn}}_{1\ensuremath{-}x}{\mathrm{Fe}}_{x}{\mathrm{O}}_{3}\phantom{\rule{0.3em}{0ex}}(0.00\ensuremath{\leqslant}x\ensuremath{\leqslant}0.40)$ were studied. For the doped samples, there is a paramagnetic--ferromagnetic (PM--FM) transition both…
Micelle-templated silicas (MTS) were synthesized by self-assembly of inorganic silica and micelles of cetyltrimethylammonium bromide (CTAB) containing different amounts of 1,3,5-trimethylbenzene (TMB) at 343 K. Nitrogen sorption isotherms and transmission electron microscopy (TEM) showed that MTS pore size increased w…
Recently it has been shown that a strongly interacting colloidal mixture consisting of oppositely driven particles undergoes a nonequilibrium transition towards lane formation provided the driving strength exceeds a threshold value. We predict here a reentrance effect in lane formation: for fixed high driving force an…
We show that annealing of stoichiometric $\mathrm{Sr}\mathrm{Ru}{\mathrm{O}}_{3}$ perovskites in high-pressure oxygen of $600\phantom{\rule{0.3em}{0ex}}\mathrm{atm}$ near $1100\phantom{\rule{0.2em}{0ex}}\ifmmode^\circ\else\textdegree\fi{}\mathrm{C}$ produces $\mathrm{Sr}{\mathrm{Ru}}_{1\ensuremath{-}v}{\mathrm{O}}_{3}…