Materials Literature
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Noncovalent assembly of ZnII–mesoporphyrin IX was accomplished by coordination to α-helical peptides (4–64 segments) based on polyamideamine dendrimer; the electron transfer functions were expressed more effectively with the growth of the dendrimer generation.
The transparent hybrid material, HLP/SiO2, was prepared by an in situ sol–gel process of tetraethoxysilane (TEOS) at 30°C in the presence of hydroxy-containing linear polyester (HLP) obtained by ring-opening reaction of diglycidyl ether of bisphenol A (DGEBA) with adipic acid under the catalyzation of triphenylphosphi…
Highly anisotropic CoPt and FePt nanoparticles have been prepared and embedded in a C and BN matrices using the tandem deposition mode. The as-made multilayer CoPt(FePt)/C(BN) films show a disordered face centered cubic (fcc) structure, which is magnetically soft and have low coercivity (10/sup 7/ erg/cm/sup 3/. The c…
Many biophysical experiments depend on large amounts of pure, soluble protein. Indeed, the revolution in structural biology has depended on molecular biology's potential to make experiments possible by allowing the overexpression of normally rare proteins in a heterologous host. All too often, however, overexpressed p…
Reaction of (NH4)2MoS4 and (NH2OH)2·H2SO4 under hydrothermal conditions led to the new compound (NH3- OH)3.9MoS4.8 I, which crystallises from acetone solution producing hollow tubules of nanoscopic size (50–500 nm diameter, 0.1–20 μm length); thermal decomposition of I led to the formation of highly dispersed tubular…
Vegetable fibers like cotton, sisal, and sugar cane bagasse have been used as reinforcement in a polymeric matrix. Because of its low cost and affinity with lignocellulosic fibers, a phenol-formaldehyde resin —resol— was selected as the matrix. Composites were prepared by compression molding. The influence of fiber vo…
A novel optically anisotropic film which consists of discotic liquid crystalline molecules aligned and fixed in hybrid mode was invented. The discotic liquid crystalline molecules are polymerizable discotic nematic liquid crystalline triphenylene derivatives. The film is exceedingly useful for improvement in viewing a…
It is well known that the intermetallic compound ${\mathrm{DyAl}}_{2}$ is ferromagnetic and exhibits a change in the easy direction of magnetization from 〈100〉 to 〈111〉, for a critical applied magnetic field in the 〈111〉 direction. Using a simple model which includes the crystalline electric field and the exchange int…
Direct and indirect anion exchange methods have been used to intercalate a [ZnII2–CrIII] lamellar double hydroxide (LDH), with [Cu(nta)]− and [Ni(nta)]− (nta = nitrilotriacetate). For the direct method, a solution of the pre-formed complexes was used to intercalate the LDH while for the indirect method the anionic nta…
The synthesis and characterisation of lanthanide complexes of mono- and tetra-amide β-cyclodextrin derivatives of 1,4,7,10-tetraazacyclododecane tetraacetate (DOTA) are reported. Luminescence and relaxivity measurements confirm that the Eu, Tb and Gd complexes of the eight-coordinate mono-amide ligand possess one boun…
The synthesis, X-ray structure, and EPR measurements of the integer-spin linear-chain antiferromagnet [Ni(ox)(dmiz)2] (where ox = C2O4(2-) and dmiz = 1,2-dimethylimidazole) are presented. The sign and size of the single-ion zero field splitting (Zfs) of the divalent Ni have been determined by high field/high-frequency…
A new simple and rapid polycondensation reaction of 4,4′-carbonyl-bis(phthaloyl-L-alanine)diacid chloride [N,N ′-(4,4′-carbonyldiphthaloyl)]bisalanine diacid chloride with several diphenols, such as bisphenol-A, phenolphthalein, 1,8-dihydroxyanthraquinone, 4,4′-dihydroxybiphenyl, 1,5-dihydroxynaphthalene and hydroquin…
A day in the life of a hard-sphere suspension (Wilson C K Poon). Light scattering and rheology of complex fluids far from equilibrium (David J Pine). Polymer physics: from basic concepts to modern developments (Alexei Khokhlov). Rheology of linear and branched polymers (Tom McLeish). Introduction to colloidal systems…
An increase in the frequency of fuel degradation following a primary breach in boiling water reactor (BWR) rods was observed during the late-1980s and early 1990s; these rods were often found to contain axial splits. Several failed rods containing splits have been returned to the Vallecitos Nuclear Center (VNC) for po…
Phenylenediamines, 4-aminophenol and 1,4-hydroquinone were polymerized via the catalysis of horseradish peroxidase in dioxane at ambient conditions by using hydrogen peroxide as the oxidant. Polymers formed in good yields are black powders soluble in dimethylformamide and dimethylsulfoxide. Several factors influencing…
Zircaloy-4 cladding has been oxidized in autoclave at 633 K with various chemistry conditions ([Li+] = 0, 10, 70, 700 ppm and [B] = 0, 650 ppm as boric acid) to quantify the effect of lithium hydroxide and boric acid on the oxidation kinetics and to provide oxide films that have been analyzed by SIMS, SEM, and RAMAN s…
The adsorption and desorption behavior of protein human serum albumin (HSA) on magnetic polymer particles covered by thermosensitive polymers was investigated. The results showed that adsorption was dependent mainly on the properties of the particle surface. By increasing the temperature, particles deswelled and were…
A surface silyl modification and surfactant removal of acid-synthesized mesoporous silica process in a single step is investigated; the surfactant–silyl exchange process allows a large amount of surface attachments of silane.
The crystal chemistry of the Sm3+ to Sm2+ reduction in tetraborate lattices was investigated. In crystalline SrB4O7 in air it is mainly Sm2+ that is incorporated from a melt or glass containing predominantly Sm3+. For the process in air, a reduction and pick-up mechanism is assumed to take place at the crystal/nutrien…
SrAl2O4 phosphor excited with fluorescent light or sunlight, has been recently reported to be a long-lasting afterglow (AG) phenomenon. However, the AG mechanism has not been clarified yet. In this study, the long-lasting AG mechanism of SrAl2O4 phosphors doped with Eu and/or Dy, was investigated on the basis of AG, p…