Materials Literature
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
Abstract The investigation of the economical use of lignocellulose waste, which is one of the environmental problems facing third‐world nations, is ongoing. In this study, we intended to increase the use of newsprint fibers in the rubber industry. For this reason, we treated newsprint fibers with sodium silicate and m…
Abstract The deterioration behavior of cellulose acetate (CA) films (degree of substitution = 2.5) was examined in hydrochloric acid (HCl) and sodium hydroxide (NaOH) solutions of various concentrations to determine acid and base catalytic effects in heterogeneous systems at room temperature. With concentrations of 0.…
Abstract The phase behaviors for the blends of poly(3‐hydroxypropionate) (PHP), poly( L ‐lactide) (PLLA), poly( D ‐lactide) (PDLA), and poly( D,L ‐lactide) (PDLLA) with catechin were investigated by differential scanning calorimetry. In PLLA/catechin, PDLA/catechin, and PDLLA/catechin blends, two glass transitions wer…
The YjgF/YER057c/UK114 family is a highly conserved class of proteins that is represented in the three domains of life. Thus far, a biochemical function demonstrated for these proteins in vivo or in vitro has yet to be defined. In several organisms, strains lacking a YjgF homolog have a defect in branched-chain amino…
Polarization modulation infrared reflection−absorption spectroscopy and surface-enhanced Raman spectroscopy are used to interrogate the behavior of the Keggin-type polyoxometalate α-[SiW 12 O 40 ] 4- on Ag and Au electrode surfaces. Assignment of specific vibrational modes and their behavior as a function of potential…
RuO(2)-based catalysts are much more active in the oxidation of CO than related metallic Ru catalysts. This high catalytic activity (or low activation barrier) is attributed to the weak oxygen surface bonding of bridging O atoms on RuO(2)(110) in comparison with the strongly chemisorbed oxygen on Ru(0001). Since the R…
Summary 1. Two types of artificial neural networks procedures were used to define and predict diatom assemblage structures in Luxembourg streams using environmental data. 2. Self‐organising maps (SOM) were used to classify samples according to their diatom composition, and multilayer perceptron with a backpropagation…
[structure: see text] Carbaporphyrinoid systems with semiquinone, cycloheptatriene, or indene subunits react under mild conditions with silver(I) acetate to give stable silver(III) organometallic derivatives.
A technique that uses a non‐static patterning method has been employed for rational design toward macrocellular silica scaffolds (see Figure). The technique allows complete control over the width, length, and curvature of the plateau borders of the silica foam. Furthermore, this macroscale void space structuration is…
Abstract An improved method of preparing water soluble chitosan was studied by N ‐acetylation with acetic anhydride. Its merits were a simple processing technique, very short reaction time, little agent, high molecular weight of the product, and good water solubility. This article not only discusses the effect of seve…
The fluorescence of a novel dyad with spiropyran and perylene diimide units can be significantly enhanced only under the combined actions of UV light, protons, and ferric ions (see Figure). This behavior corresponds to a new “AND” gate with three inputs.
Local segregation in melts of copolymers with composition gradients along their backbones is analyzed. The transition to a lamellar periodic structure as the effective degree of incompatibility χ N increases is studied for symmetric copolymers with various composition gradients. A numerical self-consistent mean-field…
ADVERTISEMENT RETURN TO ISSUEPREVNoteNEXTDirect Evidence for Vertical Diffusion and Exchange Processes of Polyanions and Polycations in Polyelectrolyte Multilayer FilmsPhilippe Lavalle, Valérie Vivet, Nadia Jessel, Gero Decher, Jean-Claude Voegel, Philippe J. Mesini, and Pierre SchaafView Author Information Institut N…
Polyaniline tubes have been prepared using sub-micrometer polymer fibers as templates. The core fibers were fabricated by a nonmechanical electrostatic process known as electrospinning. Conductive polyaniline (PANi) was coated on the surface of preformed polymer nanofibers through in situ deposition. The removal of th…
Abstract The main aim of this work was to study and compare the mechanical and thermal properties of hybrid polypropylene (PP) composites and single‐filler PP composites. With two main types of mineral fillers—calcium carbonate (CaCO 3 ) and talc—PP composites of different filler weight ratios (talc/CaCO 3 ) were comp…
The exfoliated ZnAl hydroxide sheets of LLDPE/ZnAl LDH exfoliated nanocomposite with 20 wt % loading of Zn3Al(DS) are dispersed in a disordered fashion in the LLDPE matrix. The thickness and the width/length of the individual exfoliated Zn3Al(DS) layers (combined with DS ions) are determined to be 1.5−2.5 and 15−20 nm…
Transport properties of ${\mathrm{Ba}}_{8}{\mathrm{Ga}}_{16}{\mathrm{Ge}}_{30}$ single-crystalline samples prepared with an excess of Ga are presented. The excess Ga does not only produces p-type transport properties but also a thermal conductivity (\ensuremath{\kappa}) that, unlike in any other ${\mathrm{Ba}}_{8}{\ma…
Stimulus-responsive, surface confined poly( N -isopropylacrylamide) (pNIPAAM) brush nanopatterns were prepared on gold-coated silicon substrates in a “grafting-from” approach that combines “nanoshaving”, a scanning probe lithography method, with surface-initiated polymerization using atom transfer radical polymerizati…
Abstract A potentially inexpensive alternative epoxy resin system based on soybean oil has been developed for polymer composite applications. Epoxidized methyl soyate (EMS) and epoxidized allyl soyate (EAS) have been synthesized at the University of Missouri–Rolla. These materials consist of mixtures of epoxidized fat…
Specular X-ray reflectivity (XR) and quartz crystal microbalance (QCM) measurements were used to determine the absorption of water into thin poly(4-ammonium styrenesulfonic acid) films from saturated vapor at 25 degrees C. The effect of film thickness on the absorption kinetics and overall absorption was investigated…