Materials Literature
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We report the quadratic hyperpolarizability βs of newly synthesized chirals carboxylates salts. These nonlinear optical coefficients have been measured using Hyper-Rayleigh scattering (HRS) technique in solution. Before nonlinear measurements, the different compounds under study were characterized by resonance ma…
Feldspar is being used herein as a filler in natural rubber vulcanizates. Two different types of natural rubber, SMR L and ENR 50 having 0 and 50 mol% of epoxide groups and semi-efficient vulcanization were used. The scorch time, (t2) and cure time, (t90) of both rubber vulcanizates slightly increased with increasing…
Abstract Poly(epoxy imide)s were prepared by a reaction between a hydroxyl‐group‐containing soluble copolyimide and commercial epoxy resins at 220 °C for 2 h. Poly(epoxy imide) thin films exhibited higher thermal stability and lower dielectric constants than a commercial flip‐chip package material (U300). The thermal…
Abstract The nucleophilic substitution reactions on poly(vinyl chloride) (PVC) with potassium 4‐acetamidothiophenolate, potassium 2‐naphthalenethiolate, and sodium 2‐mercaptobenzothiazolate have been undertaken in a cyclohexanone solution. The aim was to study, from a comparative point of view, the influence of nucleo…
Magnesium hydroxide sulfate hydrate nanoribbons have been synthesized by a solution-phase approach, which is based on the treatment of freshly precipitated magnesium hydroxide in an alcohol–water solution containing high concentrations of magnesium sulfate. These nanoribbons had typical lengths up to the micrometre ra…
Liposomes for drug delivery are often prepared with maleimide groups on the distal end of PEG to enable coupling of homing devices, such as antibodies, or other proteins. EDTA is used to stabilize the thiol group in the homing device for attachment to the maleimide. However, when using a homing device that contains a…
By using a combination of atomic force and confocal microscopy, we explore the deformation properties of multilayer microcapsules filled with a solution of strong polyelectrolyte. Encapsulation of polyelectrolyte was performed by regulation of the multilayer shell permeability in water-acetone solutions. The "filled"c…
Blends of dodecylbenzenesulfonic acid doped polyaniline (PANI-DBSA) with either polyacrylonitrile (PAN) in xylene/dimethylsulfoxide (DMSO) mixture or polystyrene (PS) in xylene were solution cast. The PANI-DBSA complex was obtained directly from emulsion polymerization, in which DBSA acted simultaneously as a surfacta…
The stabilization of the metastable 180 degrees twist state in a bistable chiral splay nematic liquid crystal device is studied. The stability of the metastable 180 degrees twist state is explained using the azimuthal anchoring strength, which is a function of the twist elastic constant and the cell gap. A stable 180…
Recent high-resolution x-ray investigations of the smectic-$A$ (SmA) phase near the nematic-to-SmA transition provide information about the critical behavior of the linear thermal expansion coefficient ${\ensuremath{\alpha}}_{\ensuremath{\Vert}}$ parallel to the director. Combining such data with available volume ther…
Curing characteristics and mechanical properties of carbon black– and silica-filled natural rubber (NR)/recycled rubber powder (RRP) blends were studied. Results indicate that the minimum torque and maximum torque increase with increasing filler loading in the compounds, whereas scorch time shows a decreasing trend. C…
Gold-phosphido-monolayer-protected clusters (MPCs) of 1-2-nm diameter, Au(x)(PR2)y, analogues of the well-known thiolate materials Au(x)(SR)y, were prepared by NaBH4 reduction of a mixture of HAuCl4.3H2O and a secondary phosphine PHR2 in tetrahydrofuran/water. In comparison to the Au-thiolate MPCs, fewer of the larger…
Synchrotron x-ray diffraction and high temperature SEM examinations were used to study the crystallochemical and morphological evolution of a ZnO–NaCl system during thermal processing. Decomposition of ZnO precursor (Zn2(OH)2CO3 ∗ xH2O) at T < 400 ◦ Ci saccompanied by shrinkage and destruction of its fibre-lik ep arti…
Subtilisin E (SbtE) is a member of the ubiquitous superfamily of serine proteases called subtilases and serves as a model for understanding propeptide-mediated protein folding mechanisms. Unlike most proteins that adopt thermodynamically stable conformations, the native state of SbtE is trapped into a kinetically stab…
Physical and thermal properties of polyoxyethylene glycol glycerides (Gelucire 50/13) used as sustained-release matrix forming agent in pharmaceutical applications are studied by coupled time-resolved synchrotron X-ray diffraction and differential scanning calorimetry combined with infrared spectroscopy. With these te…
The wealth of biological information provided by structural and genomic projects opens new prospects of understanding life and evolution at the molecular level. In this work, it is shown how computational approaches can be exploited to pinpoint protein structural features that remain invariant upon long evolutionary p…
Abstract The tricarbonyl complex [(η 5 ‐C 5 H 4 ‐COOMe)Mo(CO) 3 Cl] was prepared from the reaction of sodium (methoxycarbonyl)cyclopentadienide, (C 5 H 4 ‐CO 2 Me)Na, with (Bu 4 N)[Mo(CO) 5 I]. Heating the ester with 3‐(triethoxysilyl)propylamine gave the amide derivative {[η 5 ‐C 5 H 4 ‐CONH‐C 3 H 6 Si(OEt) 3 ]Mo(CO)…
Abstract Five oxalate‐containing copper( II ) complexes of formula [Cu(dpq)(H 2 O)(ox)]·5H 2 O ( 1 ), [Cu(dpp)(H 2 O)(ox)]·H 2 O ( 2 ), [Cu(bpz)(ox)] n ( 3 ), [Cu 2 (dpp) 2 (H 2 O) 2 (NO 3 ) 2 (ox)]·4H 2 O ( 4 ) and [Cu 2 Cl 2 (bpz) 2 (H 2 O) 2 (ox)][Cu(bpz)(H 2 O) 2 (ox)]·2H 2 O ( 5 ) [dpq = 2,3‐bis(2‐pyridyl)quinoxa…
The concept of a "biostructural unit" is presented as the combination of biological and structural building blocks to create scaffolds or constructs via a bottom-up approach. Three types of biostructural units were constructed using the process of fiber formation by interfacial polyelectrolyte complexation: protein-en…
Three-dimensional morphological variations in the human face were analysed using digital models of the human face, and the usefulness of such analysis in designing industrial products was demonstrated by validating spectacle frame designs based on an original sizing system developed based on the analysis. A normalized…