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。
ADVERTISEMENT RETURN TO ISSUEPREVNoteNEXTEffect of Polymer Adsorption on the Surface Tension and Flocculation of Colloidal Particles in Incompatible SolventsNily DanView Author Information Department of Chemical Engineering, Drexel University, Philadelphia, Pennsylvania 19104 Cite this: Langmuir 2000, 16, 8, 4045–4048…
Abstract The odd electron in the δRhRh* orbital of (3,1)-[Rh2(mhq)4py]+ (1+; Hmhq = 4-methyl-2-quinolinol) was estimated to be delocalized onto each π system of the four mhq bridges to the extent of ca. 9% based on its 1H NMR paramagnetic shifts. The experimental spin distribution in the mhq ligands is consistent with…
Abstract Polymer solidification under processing conditions is a complex phenomenon in which the kinetics of flow, high thermal gradients and high pressures determine the product morphology. The study of polymer structure formed under pressure has been mainly made using conventional techniques such as dilatometry and…
The resistivity behaviour of high porosity nickel foam as a function of porosity has been investigated experimentally. The results were compared with a number of empirical and theoretical models. It was found that a new model based on structural properties gave the closest fit to the experimental data. This provides a…
Abstract— Optical alignment and micro‐patterning of the alignment of liquid‐crystal displays (LCDs) by linear photopolymerization (LPP) technology renders high‐quality multi‐domain twisted‐nematic (TN) and supertwisted‐nematic (STN) displays with broad fields of view over wide temperature ranges feasible. The prerequi…
The foci or branch points are found for a sinusoidal boundary. It is shown how they determine the range of validity of Rayleigh's hypothesis for diffraction gratings.
In the process of fabric spreading, the variance of fabric yardage between fabric rolls may lead to a difference in fabric loss during spreading. As there are numerous combinations the arrangement of the fabric roll sequences for each cutting lay, it is difficult to construct a roll planning to minimise the fabric was…
The thermal decomposition of a freeze dried Ni-Fe-μ-oxo-acetate results in the formation of an amorphous nickel ferrite. Crystallization of the spinel NiFe2O4 takes place between 300 and 500°C. High disperse amorphous (or less crystalline) products with specific surfaces up to 500 m2/g can be obtained by carful decomp…
Nd(S2O7)(HSO4): The First Disulfate of a Rare Earth Element Light violett single crystals of Nd(S2O7)(HSO4) have been obtained by the reaction of Nd2O3 and oleum (30% SO3) at 200 °C in sealed glass ampoules. The crystal structure (monoclinic, P21/n, Z = 4, a = 857.8(1), b = 1061.0(2), c = 972.4(1) pm, β = 99.33(2)°) c…
Abstract Crystallization behavior of natural rubbers of different clonal origins, i.e., RRIM 600, 60/2, 2025, 2026, and skim rubbers, was investigated by dilatometry at −25 °C. The latex samples were deproteinized with a proteolytic enzyme in the presence of surfactant. Skim rubbers were purified by centrifugation fol…
The effects of electrodes on the deposition characteristics and electrical properties of lead zirconate titanate (PZT) films deposited by electron cyclotron resonance plasma enhanced chemical vapor deposition (ECR-PECVD) were investigated. Pt/Ti/SiO 2 /Si and RuO 2 /SiO 2 /Si were used as bottom electrodes (substrates…
A study was conducted to determine the effect of slope terracing on soil quality in some oil palm plantations in Peninsular Malaysia. Samples from three different deep terraced-saprolitic profiles of varying depth and geology were collected and analysed for their physicochemical properties and chemical fertility chara…
Molecular dynamics simulations were carried out on several linear alkane systems of different chain lengths, confined between hydroxylated α-aluminum oxide surfaces at experimental densities, to study structural and dynamical features of the film/surface interfaces. The simulations show that there is extensive multila…
Abstract A microporous silica gel was prepared by a sol-gel process in the presence of ethylene glycol (EG) and its oligomers (oligoEG), and the pore formation process was investigated by using NMR and TG-DTA. The micropore volume changed with the polymerization degree of oligoEG, and showed a minimum at the trimer of…
The picture of a grain boundary as a periodic array of dislocations implies the occurrence of phonon scattering processes that the Klemens theory of thermal conductivity does not account for. A grain boundary works similar to a diffraction grating, producing diffraction spectra of various orders: each order number n i…
A semi-implicit formulation of Tate-independent classical plasticity, as implemented in a three dimensional continuum mechanics code is discussed.The plasticity formulaijon employs an associative flow de fo7 the evo.hdion of plastic sih'sin, an anisotropic yield criterion, an application of Nemat-Nasser 's semi-implic…
The radioactive isotope 32Si was used to measure Si uptake during a spring bloom dominated by the diatom Thalassiosira nordenskioeldii. The diatoms converted virtually all dissolved silicic acid in the surface layer into biogenic silica. The rate of Si uptake was unsaturated in all the experiments conducted during the…
The one-particle models of crystal-field theory provide a qualitative interpretation for the observed ground state splitting of four Kramers doublets of the 8S7/2 of Bk4+ doped into CeF4. A set of nine nonzero (Bqk) parameters corresponding a C2v point symmetry provide a very good correlation between the experimental…
Glass slides were chemically etched with sulfuric acid using five different methods. We investigated the effects of chemical etching condition on such properties as chemical composition, surface roughness, and thermal stability of the glass. Sodium and carbon atoms on the surface of the glass are effectively eliminate…
Abstract The photoreduction processes of α-[PMo12O40]3- (α-PMo12(0)) in aqueous solutions at pH 2.0 are discussed on the basis of the results of the electrical conductivities and 31P NMR spectra of photolytes, and the crystal structures of α-type two-electron and β-type four-electron reduction species isolated from ph…