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。
Combinatorial mutagenesis and in vivo selection experiments previously afforded functional variants of the AroH class Bacillus subtilis chorismate mutase lacking the otherwise highly conserved active site residue Arg(90). Here, we present a detailed kinetic and crystallographic study of several such variants. Removing…
The influence of doping of the Sr x Ba 1− x Nb 2 O 6 ( x =0.61) crystals (SBN-0.61) by rare-earth element (RE) dopants has been investigated. Taking into account the data available in the literature, it is demonstrated that the introduction of all rare-earth metals is accompanied by a substantial decrease in the tempe…
The residual thermoelastic stresses were studied in Al 2 O 3 –ZrO 2 (monoclinic zirconia, m ‐ZrO 2 ) and Al 2 O 3 –ZrO 2 (Y 2 O 3 ) (tetragonal zirconia, t ‐ZrO 2 ) fibrous eutectics that were produced via the laser floating zone method, using different piezospectrosocopic probes. The luminescence of the R ‐lines of r…
Boron‐rich boron nitride (BN) films have been prepared on Si and SiO 2 /Si substrates by the vacuum pyrolysis of spin‐coated polyborazine films. Physical properties of the prepared films such as film strength, thermal conductivity, and dielectrics were determined. The BN films vacuum‐pyrolyzed at 900°C showed residual…
The effect of reaction temperature on the catalytic and photocatalytic oxidation of ethylene on unplatinized and platinized versions of a TiO 2 /ZrO 2 mixed-oxide thin-film catalyst is presented in this study. Ethylene conversion data collected using a recirculating tubular reactor are analyzed using a half order mode…
Four generations of poly(propylene imine) dendrimers have been covalently modified with pyrene moieties and examined by fluorescence spectroscopy. Emission and excitation spectra were obtained so that the generational dependence of the dendrimers, especially the extent of steric crowding, could be correlated to the ph…
The adsorption behavior of the mussel adhesive protein Mytilus edulis foot protein‐1 (Mefp‐1) has been investigated on a negatively charged polar SiO2 surface and an electrically inert non‐polar CH3‐terminated thiolated gold surface. How the structure of adsorbed Mefp‐1 is changed upon chemically and enzymatically ind…
The size effects of ferroelectric particles described by the transverse Ising model have been studied taking into account the long-range interactions. The size dependence of the mean polarization, Curie temperature, and the mean susceptibility, as well as the critical size of the particle, have been obtained. The prof…
ABSTRACT In this study, attempts were made to improve the characteristics of starch‐based plastic foams by blending starch with polylactic acid (PLA), a biodegradable polymer made from renewable sources. Formulations of the foams (types of starch, ratio of starch to polymer, and moisture content) were optimized. Physi…
To use porous silicon as an optical interferometric biosensor, the pores must be sufficiently large to allow easy ingress of reagents and the layer must also display Fabry-Perot optical cavity modes. Here the detection antibody is rabbit IgG and the analyte is α-rabbit IgG conjugated to horseradish peroxidase (HRP). F…
The thermal decomposition kinetics of different polymorphs of CL-20 (α, γ and ε) has been investigated by thermogravimetry, IR spectroscopy and optical and electronic microscopy. The reactions proceed with self-acceleration and can be described by a kinetic law of first order with autocatalysis. Already at the earlies…
Chemically synthesized nanoparticles can be regarded as building blocks for more complex systems. Hence, the characterization of their attributes is a key step toward controlling and tuning the properties of new nanocomposite materials. We present a structural characterization of thiol-capped gold nanoparticles as a f…
The nucleation and crystallization of a series of glasses based on 4.5SiO 2 ·3Al 2 O 3 ·1.5P 2 O 5 ·(5 − z )CaO · z CaF 2 with a Ca:P ratio corresponding to apatite were studied. In these glasses, the objective was to investigate the influence of fluorine content and z was varied from 3 to 0. All the glasses studied c…
The heat capacity of synthetic eskolaite, Cr 2 O 3 , and of the synthetic spinels magnesiochromite, MgCr 2 O 4 , and chromite, FeCr 2 O 4 were measured from 1.5 K to 340 K. For MgCr 2 O 4 , a substantial magnetic contribution to the entropy is revealed by a sharp peak in the heat capacity curve at 12.55 ± 0.05 K, whic…
A temperature-dependent study was carried out for the platinum-nanoparticle-catalyzed electron-transfer reaction between hexacyanoferrate(III) and thiosulfate ions in the temperature range of 20−70 °C. The Pt nanoparticles are dominantly truncated octahedral in shape and have an average particle size of 7.0 ± 0.8 nm.…
Stem scar application of chitosan inhibited growth and production of pathogenic factors by blackmold rot [ Alternaria alternata (Fr.:Fr.) Keissl.] in challenged tomato ( Lycopersicon esculentum Mill.) fruit stored at 20 °C for 28 days. Blackmold lesions were visible within 4 days of inoculation in control fruit, compa…
Thermally-carbonized porous silicon films have been prepared by exploiting the dissociation of acetylene. Thermoanalytical methods have been used to study the oxidation behavior of these films in different oxidizing ambients. The results have been compared to other stabilization methods. Due to enhanced adsorption and…
The Cd 2+ -mediated assembly of multiporphyrin arrays at air−subphase interfaces has been studied. Surface pressure−area isotherms for the monolayers of zinc tetrapyridylporphyrin (ZnTPyP) showed that the mean ZnTPyP molecular area was 0.65 and 1.9 nm 2 on water and 0.1 M Cd 2+ subphase surfaces, respectively. Spectro…
A mathematical model for prediction of the compressional behaviour of woven reinforcement is described. The model accounts for the compression of yarns and the change of yarn crimp under pressure applied to a fabric layer. Compression curves of glass rovings are studied experimentally and serve as input for simulation…
We investigated the effect of A-site compound substitution on the structures and properties of Ca 0.8 (MCe) 0.1 Bi 4 Ti 4 O 15 (M denotes Li, Na and K) ceramics. The samples were prepared by the conventional ceramic technique. Sintering characteristics of Ca 0.8 (MCe) 0.1 Bi 4 Ti 4 O 15 and CaBi 4 Ti 4 O 15 ceramics w…