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。
The use of chitosan microparticles as injectable carriers for cell transplantation represents a promising alternative to avoid the drawbacks of the implantation of other forms of three-dimensional (3D) scaffolds seeded with cells. In this study, a 3D construct is obtained in vitro by combining chitosan microparticles…
Superconductivity in carbon nanotubes (CNTs) is attracting considerable attention. However, its correlation with carrier doping has not been reported. We report on the Meissner effect found in thin films consisting of assembled boron (B)-doped single-walled CNTs (B-SWNTs). We find that only B-SWNT films consisting of…
For a sample of an arbitrary shape, the dependence of its conductance on the longitudinal and Hall conductivity is identical to that of a rectangle. We use analytic results for a conducting rectangle, combined with the semicircle model for transport coefficients, to analyze the properties of the graphene monolayer and…
This paper presents a simple and low-cost method to prepare hollow silica spheres. This method is just based on a PVP-involved emulsion polymerization and subsequent sol−gel process. PVP first participated in the polymerization reaction as a stabilizer or surfactant and then played a coupling agent role in the latter…
The adsorption and reaction of methanol and formaldehyde on two-dimensional PdZn alloys on a Pd(111) surface were studied as a function of the Zn content in the alloy in order to understand the role of Zn in Pd/ZnO catalysts for the steam reforming of methanol (SRM). Temperature programmed desorption (TPD) and high re…
Abstract Many new materials have been identified as being of potential interest to solid oxide fuel cell developers. Recent work has suggested that materials of the La 2 NiO 4 composition possess sufficient activity to act as an effective cathode. Whilst there have been many studies of the transport properties of mate…
No template and no organic medium are needed for the low-temperature, one-pot aqueous route to layered manganese oxides with a hierarchical core–corona architecture (see picture). Particle formation occurs by a two-step precipitation process with two different kinetics.
Abstract Polyurethane foams were prepared from the liquefied cornstalk polyol, which was obtained by the liquefaction of cornstalk in the presence of polyhydric alcohols using sulfuric acid as catalyst. The advisable liquefaction reaction conditions were selected by investigating their influences on the properties of…
Abstract In this article, shear rheology of solutions of different concentrations obtained by dissolution of cellulose in the ionic liquid (IL) solvent 1‐butyl‐3‐methylimidazolium chloride ([Bmim]Cl) was studied by measuring the complex viscosity and dynamic moduli at different temperatures. The obtained viscosity cur…
Highly dense lead‐free ceramics (1− x )(K 0.5 Na 0.5 )NbO 3 − x (Bi 0.5 Na 0.5 )TiO 3 [(1− x )KNN− x BNT] have been synthesized by pressureless sintering owing to the careful control of processing conditions. The densification of (1− x )KNN− x BNT ceramics improves with increasing addition of BNT. The translucence is…
We extend the design of radially symmetric invisibility cloaks through transformation optics as proposed by Pendry et al. [Science 312, 1780 (2006)] to coated cylinders of an arbitrary cross section. The validity of our Fourier-based approach is confirmed by both analytical and numerical results for a cloak displaying…
We have investigated the influence of nuclear geometric relaxation on the extent of the excited-state electronic delocalization in conjugated zinc porphyrin oligomers using ultrafast transient photoluminescence spectroscopy. By use of metal-coordinating templates that force the oligomers into specific geometries in so…
B und N als Rückgrat: Lösliche lineare Polyaminoboran-Homopolymere und -Copolymere mit hohen Molekulargewichten wurden durch die iridiumkatalysierte Dehydrokupplung der leicht erhältlichen Amin-Boran-Addukte RNH2⋅BH3 synthetisiert (R=H, Me, nBu).
Recent research in the field of LbL assembly is summarized and categorized as fabrication, sensing, drug release/delivery, and cell technology. Special emphasis is given to topics such as cell-membrane-mimic assembly, fabrication of free-standing biomolecular structures including protein microtubes, detection of DNA a…
Functional giants: Amphiphilic bioconjugates can be synthesized in situ by grafting polystyrene from a protein (see scheme). The resulting giant amphiphiles display low polydispersities and the characteristic aggregation properties of amphiphilic biomacromolecules. A second, catalytically active guest protein can also…
The kinetics and mechanism of ether and alkanol cleavage reactions on Brønsted acid catalysts based on polyoxometalate (POM) clusters are described in terms of the identity and dynamics of elementary steps and the stability of the transition states involved. Measured rates and theoretical calculations show that the en…
This paper deals with the synthesis of short Saccaharum Cilliare fibre (SC) reinforced Urea‐Formaldehyde (UF) matrix based polymer composites. Present work reveals that mechanical properties such as: tensile strength, compressive strength, flexural strength and wear resistance of the UF matrix increase up to 30% fibre…
The Medium-Chain Dehydrogenase/Reductase Engineering Database (MDRED, http://www.mdred.uni-stuttgart.de) has been established to serve as an analysis tool for a systematic investigation of sequence-structure-function relationships. It includes sequence and structure information of 2684 and 42 medium-chain dehydrogenas…
This book is an update and major revision to Radiological Assessment: A Textbook on Environmental Dose Analysis published by the U.S. Nuclear Regulatory Commission in 1983. It focuses on risk to the public because decision makers typically use that endpoint to allocate resources and resolve issues. Chapters in the boo…
Abstract The long‐term thermal‐oxidative aging behavior of polyamide 6 (PA6) was studied by comparison with the stabilized sample in this work. The variation of mechanical properties of the pure and the stabilized samples of PA6 with aging time at 110°C, 130°C, and 150°C were investigated, respectively. The aging mech…