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。
Recent advances in the chemistry of main group porphyrin complexes are surveyed. New, unprecedented structural types for porphyrin complexes which have been revealed from the recent reports of boron and tellurium porphyrins are described. Advances in the preparation and reactivity of Group 14 (silicon and tin) and Gro…
Field-emission displays (FEDs) promise to provide high-resolution emissive flat-panel displays. Currently, the development of Spindt-type FEDs is at an advanced stage with monocolor FEDs being supplied to the marketplace. Full-color FEDs are getting ready for commercial production. A number of other field-emission ele…
Two types of hybrid vascular grafts were hierarchically structured with an autologous smooth muscle cell (SMC)-inoculated collagen gel layer and an endothelial cell (EC) monolayer, and wrapped with different elasomeric scaffolds. Type A graft was wrapped with poly(urethane)-nylon mesh, and type B graft was wrapped wit…
ABSTRACT: : Four different whey‐protein‐isolate (WPI)/plasticizer formulations were compared to determine which provided the most gloss and which was most stable with time when applied on chocolates. The 4 plasticizers studied were glycerol, polyethylene glycol 400 (PEG 400), propylene glycol (PG), and sucrose, all in…
A relationship between the measurable monomer-monomer structure factor, and the centre-of-mass (CM) structure factor of dilute or semi-dilute polymer solutions is derived from Ornstein-Zernike relations within the "polymer reference interaction site model" (PRISM) formalism, by considering the CM of each polymer as an…
The effect of a transverse tensile stress on the electric‐field‐induced 90°‐domain reorientation in tetragonal lead zirconate titanate (PZT) near the morphotropic phase boundary was investigated in situ using X‐ray diffraction (XRD). The XRD intensity ratio, I (002) / I (200) , which represents the ratio of the volume…
The surface‐crack‐in‐flexure (SCF) method uses a Knoop indenter to create small, semielliptical surface precracks in beam specimens. Lateral cracks may interfere with the primary median crack and cause errors of up to 10% in determination of fracture toughness, particularly for materials for which the fracture toughne…
Diamond nanocrystalline films are prepared by the ion bombardment-assisted gas vapor synthesis technique. The phase quality, morphology and microstructure of the films are investigated by means of Raman spectroscopy, scanning electron microscopy, and high-resolution transmission electron microscopy. The grain size in…
The results of an investigation concerning a mechanism of brittle fracture in glass reinforced plastic (GRP) rods used in non-ceramic insulators (NCI) are presented. Commercial grade GRP rods and GRP rods from actual insulators were exposed to ultra-pure water (UPW) and acids while being subjected to mechanical stress…
Hydrotalcite (HT) conversion coatings are a possible alternative to chromate conversion coatings (CCC) for the pretreatment of aluminum aerospace alloys, but they must meet several criteria for acceptance. Relevant to acceptance are the abilities of these coatings to provide stand-alone corrosion protection, suitable…
Room temperature vulcanizing (RTV) silicone rubber coating has excellent leakage current suppression characteristics. It is used extensively on porcelain and glass insulators in pollution prone areas as an anti-pollution measure. A pollution aging chamber has been fabricated and an on line 4-channel personal computer…
A mathematical simulation of the perception of thermal and moisture sensations is developed using mathematical models that describe the physical mechanisms of heat and moisture transfer in fabrics, the neurophysiological responses of thermoreceptors. and the psychoneurophysiological relationships identified from exper…
Abstract A one-shot-laser-pulse (6 ns) irradiation converted the electronic state of Na0.68Co1.20[Fe(CN)6]·3.7H2O from FeII(S=0)-CN-CoIII(S=0) to FeIII(S=1/2)-CN-CoII(S=3/2) at room temperature. This photochemical reaction was observed only above the power density of 45 mJ pulse-1 cm-2, and its quantum yield amounted…
Capsule integrity as a function of the acid concentration, the acid-adding sequence, the outermost layer of the deposited multilayers, and the capsule wall thickness was investigated using confocal laser scanning microscopy. Optimal conditions for fabricating good quality polyelectrolyte capsules templated on melamine…
In this work we have investigated the electrocatalytic activity for O2 reduction of monomeric (FePcTA) and polymeric (poly-FePcTA) iron tetraaaminophthalocyanine, deposited on glassy carbon. The activity of the electropolymerized ligand (poly-H2PcTA) was also investigated. Its activity is much lower than the activity…
Thin films of ZnxIn2Ox+3 (x=2, 3, 4, 5, 7, 9, 11, 13, and 15) were grown by pulsed laser deposition and their electronic properties characterized. Through resistivity, Hall mobility and carrier concentration measurements as a function of temperature, we found that whatever the composition, these films behave as n-type…
Dolomite powder from Coín (Spain) was heated in air at a constant rate of 2°C/min to 1000°C, while neutron diffraction patterns were collected every 150 s. Rietveld refinement was applied and raw intensity data were used to monitor decomposition. The full process happened in two stages: dolomite decomposition to give…
A new method for the kinetic analysis of the initial stage of sintering for constant‐heating‐rate data has been proposed. Unlike all of the methods previously reported in the literature, this new method proposed here allows the simultaneous determination of the activation energy and the kinetic model from a single dil…
The dielectric relaxation strength of the β process, Δεβ, in a rigid-molecular glass of 16.6 mol % chlorobenzene cis-decalin mixture increases slowly with temperature, T, until the glass-softening range is reached, and thereafter it increases rapidly, i.e., (dΔεβ/dT) increases at Tg relatively abruptly. This is remark…
Polyamidoamine (PAMAM) dendrimers were prepared by linking methyl methacrylate and ethylenediamine successively on an amine core. Surface modification of PAMAM dendrimer was done by fatty acid grafting converting them to a unimolecular micellar system (Dendrimer grafts). IR, 1H NMR, 13C NMR studies confirmed the struc…