Materials Literature
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Abstract Crosslinked poly[styrene‐ co ‐(furfuryl methacrylate)] has been produced by the Diels–Alder (D‐A) reaction between the furan ring (within the copolymer) and the maleimide (MI) group (within the other reactant, bismaleimide). The retro D‐A reaction was followed by the analysis of MI groups produced at differen…
Luminescent [(NH(3))(4)Pt][Au(CN)(2)](2).1.5(H(2)O), which forms from aqueous solutions of [(NH(3))(4)Pt]Cl(2) and K[Au(CN)(2)], crystallizes with extended chains of the two ions with multiple close Pt...Au (3.2804(4) and 3.2794(4) A) and Au...Au (3.2902(5), 3.3312(5), and 3.1902(4) A) contacts. Nonluminescent [(NH(3)…
The crystal structure of a small, basic DNA binding protein, Sso10b2, from the thermoacidophilic archaeon Sulfolobus solfataricus was determined by the Zn multiwavelength anomalous diffraction method and refined to 1.85 A resolution. The 89-amino-acid protein adopts a betaalphabetaalphabetabeta topology. The structure…
Abstract The molecular design of semi‐inorganic polymers has produced polysilphenylene–siloxane and polyphosphazene elastomers having comparable fire safety to heat resistant engineering plastics. In flaming combustion a polyphosphazene rubber had a four times lower peak heat release rate than the polyurethane elastom…
D-Hydantoinase (D-HYD) is an industrial enzyme that is widely used in the production of D-amino acids which are precursors for semisynthesis of antibiotics, peptides, and pesticides. This report describes the crystal structure of D-hydantoinase from Burkholderia pickettii (HYD(Bp)) at a 2.7-A resolution. The structure…
Abstract The recent emergence of organic electrochromics on both the scientific and industrial levels has expedited the synthesis of new materials with varied electrochemical and optical properties. The structural versatility and broad usage of poly(3,4‐ethylenedioxythiophene) (PEDOT) has stimulated many research grou…
Over the past two decades and in particular the past five years, numerous sandwich-type rare earth complexes containing naphthalocyanine ligands have been synthesized. The more extended delocalized π-electron system of naphthalocyanine in comparison with phthalocyanine generates unique physical, spectroscopic, electro…
Anisotropic strain gradient elasticity theory is applied to the solution of a mode III crack in a functionally graded material. The theory possesses two material characteristic lengths, l and l′, which describe the size scale effect resulting from the underlining microstructure, and are associated to volumetric and su…
By examining natural-abundance 13 C and 15 N solid-state nuclear magnetic resonance (NMR) spectra of acid-precipitated chloroquine−ferriprotoporphyrin IX (CQ−FPIX) aggregates, the first direct evidence is provided for CQ−FPIX complexes in the solid state, formed in a physiologic aqueous solution that mimics the enviro…
Abstract Raman spectroscopy has been the most extensively employed method to study carbon nanotubes at high pressures. This review covers reversible pressure‐induced changes of the lattice dynamics and structure of single‐ and multi‐wall carbon nanotubes and irreversible transformations induced by high pressures. The…
Abstract The effect of a particle marble filler on the creep response of a crosslinked polyester matrix before and after physical aging is described. Composites with various filler–polyester matrix percentages are prepared by applying mixing technology, curing at room temperature, and postcuring above the glass‐transi…
Abstract The presence of biofilm modifies the electrochemical properties of the interface and the mass transport near the interface. Two biofilm effects are damageable: the reduction of heat and/or mass transfer and the biocorrosion or microbiologically influenced corrosion (MIC). Two kinds of electrochemical sensors…
Ralstonia eutropha accumulates poly(β-hydroxybutyrate) up to 80% of its dry weight (as a carbon andenergy source) and is the best-known PHB producer. Although PHB has many potential applications in medicine, veterinary practice, agriculture and surgery, its high cost limits the widespread use of it. The recentresearch…
Inaccuracies of the Jiles-Atherton model in the region of weak magnetization may be to a large degree removed by introducing a variable pinning parameter. Applying the simple approximate dependence of this parameter on the amplitude of magnetization considerably improves the accuracy of calculations. Additionally, it…
With the aid of several demonstration experiments, it is shown how a stirred scalar mixture relaxes towards uniformity through an aggregation process. The elementary bricks are stretched sheets whose rates of diffusive smoothing and coalescence build up the overall mixture concentration distribution. The cases studied…
Abstract The behavior of ammonia adsorption was studied on various types of surface-treated active carbon (HNO3-AC, H2SO4-AC, HCl-AC, NaOH-AC, CuO-AC, and H2-AC) under 0–75 kPa and 323–473 K. Amount of ammonia adsorption on active carbon was increased by the surface oxidation through acid treatment or metal nitrate de…
A new, three-electrode, hybrid-aligned nematic (HAN) liquid crystal (LC) device for fast response applications is described. The three-electrode configuration generates electric field horizontally and vertically which alternately turn the LC cell on and off. The fast response is realized with both the turn-on and turn…
Abstract The effects of soybean oil (SO) and epoxidized soybean oil(ESO) as biodegradable plasticizers for poly(3‐hydroxybutyrate‐ co ‐3‐hydroxyvalerate) (PHBV) were studied using thermal and mechanical analyses. PHBV/SO and PHBV/ESO blends were prepared by evaporating solvent from blend solutions. The levels of addit…
Abstract For applications demanding the best high temperature aging performance with lowest compression set, polymers are crosslinked with peroxides. The carbon-carbon bonds that are formed are more thermally stable than crosslinks containing sulfur atoms generated by conventional vulcanization by sulfur- and sulfur b…
The study involved the thermal degradation of phenolic resins in controlled atmospheres (inert and oxidizing). Its aim was to characterize volatile organic compounds (VOC) and inorganic compounds released during heat treatment. The methods used were thermogravimetry coupled with thermodesorption/gas chromatography/mas…