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。
Osteocalcin is one of the most abundant noncollagenous proteins in bone. It is strongly associated with the mineral phase of bone, and has long been associated as a marker of bone turnover. However, its relationship to bone composition, strength, and structure is unclear. Carp rib bone is an excellent model for the st…
Pheophorbide a (Pheo) is a well-known hydrophobic photosensitizer used for photodynamic treatment of various diseases. The influence of the surroundings on the electronic properties of photosensitizers mainly accumulating in membrane structures is of relevance for their photoactivity. In this paper the current knowled…
A new synthetic route is reported for the synthesis and covalent bonding of electrically conductive polypyrrole to a poly(ethylene terephthalate) fabric. It involves a three-step process including surface phosphorylation and graft polymerization from the gaseous phase. In the first step, the fibre surfaces are activat…
Reactions between Te, TeO2, TeCl4, TeO3 or H6TeO6 and 30–95 wt% H2SO4 were studied at temperatures up to the boiling point of the acid. Depending on the tellurium-containing reactant, H2SO4 concentration and synthesis temperature, Te2O3(SO4), TeO3 or TeO3·xH2O (x = 1.37–1.58) is obtained as the final product (alone or…
Abstract A versatile process employing anionic surfactants has been developed for the preparation of processible nanocomposite films with electrical conductivity and magnetic susceptibility. Maghemite ( γ Fe 2 O 3 ) nanoclusters (~10 nm in size) are coated with 4-dodecyl-benzenesulfonic acid, and polyaniline (PAn) cha…
The effects of differences in food matrices on the absorption of four flavour compounds (limonene, decanal, linalool and ethyl 2-methyl butyrate) into linear low-density polyethylene (LLDPE) were studied using a large volume injection GC ‘in vial’ extraction method. Food components investigated included β-lactoglobuli…
Zirconia samples have been prepared from xerogels and aerogels obtained using zirconium n-propoxide as precursor. Structure and texture have been investigated by X-ray diffraction, thermal analysis, transmission electron microscopy, nitrogen adsorption/desorption. Surface acidity and basicity have been assessed by ads…
A combined experimental and molecular simulation study of the oxidation of thioethers with hydrogen peroxide using Ti-containing zeolites as catalysts is described and discussed. Two aspects of reaction selectivity were explored. First, regioselectivity was studied for the oxidation of allyl methyl thioether with TS-1…
Abstract Cast film extrusions were carried out on polyethylene terephthalate (PET), on a laboratory line. The thermal and the geometrical behavior of the film, in the region from die to chill roll, was studied in different working conditions. The experimental evaluations were performed with an Infrared Thermography (I…
Deuterium induced isotopic shifts in the 13C NMR spectra of spiropyrans and equilibrium mixtures of their TTT and TTC merocyanine form isomers give insights into rovibrational and geometric changes that occur upon isotopic substitution which also result in changes in nuclear shielding. Isotopic shifts in the 13C NMR s…
An up-date is given on the use of ferroelectric (FE) thin films in memory devices, both as passive capacitors in dynamic random access memories (DRAMs) and as the memory itself in nonvolatile switching devices (both destructive-read-out NV-FRAMs and nondestructive-read-out ferroelectric-gated FETs – field effect trans…
Novel biodegradable polyphosphazenes containing glycine ethyl ester and benzyl ester of amino acethydroxamic acid as cosubstituents (PGBP) were synthesized by further modifying poly[bis(glycine ethyl ester)phosphazene] (PGP). The polymers were characterized by IR, 1H-NMR, DSC, and elemental analysis. Degradation exper…
We have synthesized several new layered protonated materials related to Ruddlesden–Popper phases, H2A0.5nBnO3n + 1·xH2O (A = Ca, Sr; B = Nb, Ta), by ion-exchange of the lithium ion from Li2A0.5nBnO3n + 1, a family of layered perovskites recently synthesized by us, in dilute HNO3 at 60 °C. The protonated derivatives sh…
The heterogeneous oxidation of methane-air mixture in a honeycomb catalytic reactor is investigated numerically in the present study. An improved multi-step surface reaction mechanism for methane oxidation on platinum is proposed so that surface ignition of lean methane-air mixtures is better modeled. First, this surf…
Research Article| January 01, 2000 Rigid Unit Modes in Framework Structures: Theory, Experiment and Applications Martin T. Dove; Martin T. Dove Department of Earth Sciences, University of Cambridge, Downing Street, Cambridge CB2 3EQ, UK Search for other works by this author on: GSW Google Scholar Kostya O. Trachenko;…
Perovskite-type phases SrFe1–xTixO3–y with 0.1 ≤ x ≤ 0.7 have been prepared from the oxides, and, in order to reach high oxygen contents and FeIV fractions, annealed at oxygen pressures of 60 MPa. The materials were characterised by powder x-ray and neutron diffraction, 57Fe Mössbauer spectroscopy, and magnetic suscep…
A general photochemical synthesis of large thiohelicenes containing nine and eleven rings is discussed along with the organisation of racemic thiohelicenes in crystals: heterochiral assembling is dominant except in the nine-ring system where interactions involving terminal ring S atoms favour the segregation of close-…
A new class of mesostructured semiconducting materials, M-Ge-Q (Q=S, Se), has been synthesized using aqueous electrostatic supramolecular self-assembly. The pores in these mesostructured materials are adjustable and are filled with surfactant molecules (see Figure) which can be removed by heating in an inert atmospher…
Trimesic acid and various alkylamines assemble into ordered two-dimensional hexagonal hydrogen-bonded networks in both bulk crystals and at the air/water interface.
Monte Carlo simulations of polyethylene (PE) melts and thin films have previously been performed on the second nearest neighbor diamond (2nnd) lattice by including short and long range interactions. A fiber can be obtained from equilibrated thin film snapshots by increasing another (normal to thin film plane) periodic…