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。
Differential thermal analysis (DTA) experiments described herein apply two methodologies by which to estimate absolute nucleation rates and/or temperature dependencies using a low‐expansion, commercially relevant, multicomponent glass‐ceramic as a test material. In particular, the Marotta and the Ray et al. methods we…
X-ray diffraction (XRD), of the two systems of mixed ferrites Cu1+xTixFe2–2xO4 (where x = 0.0, 0.1, 0.2, 0.3, and 0.4); indicates that the samples of x = 0 (CuFe2O4) and x = 0.1 of the Cu–Ti system were formed in tetragonal structure and all other samples of the two system were formed in the cubic system. The ac condu…
We have studied the temperature and field dependence of the magnetocaloric effect in the Ge-rich alloys Gd/sub 5/(Si/sub x/Ge/sub 1-x/)/sub 4/, where x=0.0825, 0.15, and 0.1875. The low field susceptibility shows a two-step magnetic ordering at the Curie temperature T/sub C/ and the Neel temperature T/sub N/. The T/su…
Certain basic demands from visualization code are common to all atomistic or spin systems; some are also relevant to more general visualization needs. Many commercial and homegrown visualization codes could meet these demands, but obviously the specific code used is less important than the fact that a visualization is…
Ni/sub 49/Mn/sub 30/Ga/sub 21/ fine particles were prepared by spark erosion. Most of the particles are spheres with sizes ranging from about 5 nm to 100 /spl mu/m. The particles have martensite structure at room temperature as indicated by X-ray diffraction (XRD). Measurements of the temperature dependence of the mag…
Undoped and cobalt‐doped basal inversion boundaries were fabricated in ZnO bicrystals to investigate their current–voltage characteristics. High‐resolution transmission electron microscopy observations and energy‐dispersive X‐ray spectroscopy analyses for a cobalt‐doped bicrystal revealed that the boundary was highly…
This paper deals with an investigation of the trapping mechanisms and the “pumping” process on a device based on polycrystalline Chemical Vapor Deposited (CVD) diamond, recently tested as particle tracker. Photoconductivity measurements have been carried out during monochromatic illumination from near IR to above band…
When two miscible fluids, such as glycerol (glycerin) and water, are brought in contact, they immediately diffuse in each other. However if the diffusion is sufficiently slow, large concentration gradients exist during some time. They can lead to the appearance of an “effective interfacial tension”. To study these phe…
Abstract The flame retardancy and heat resistance of a phenol‐biphenylene‐type epoxy resin compound, which forms a self‐extinguishing network structure, were increased by the inclusion of a benzoguanamine‐modified phenol biphenylene resin. The benzoguanamine‐modified phenol biphenylene resin contains a benzoguanamine…
Abstract Two new species of Fragilariforma, F. cassieae sp. nov. and F. rakiuriensis sp. nov., are described from material from New Zealand, with reference to populations found in Australia. The new species are similar in shape and size to Fragilariforma lata and F. hungarica var. tumida but are separated on the basis…
The synthesis and characterization of sponges composed of polysaccharides crosslinked with different amine-containing natural polymers for the use as cell carriers is described. Sponges based on arabinogalactan, dextran, and amylose were synthesized by crosslinking with chitosan, or with the protein: gelatin, or bovin…
To specify the donor energy levels in TlInS2 single crystals, the dark electrical resistivity, photoconductivity and Hall measurements were carried out in the temperature range of 100–400 K, 110–350 K and 170–400 K, respectively. The Hall measurements revealed that the crystals exhibit an anomalous behavior of Hall vo…
Chlorophyllin (CHL) is the sodium-copper salts of chlorophyll derivatives. In this study, the CHL was derived from a traditional Chinese medicine, the Bombyx mori excreta. The CHL, at concentrations 25-400 microg/ml, reduced the proliferation of HL-60, K-562, S-180, and MCF-7 cells by 8.2-95.7% after 72 h of incubatio…
The Curie temperature of rare-earth Co intermetallics is investigated by self-consistent spin-polarized electronic-structure calculations on Y-Co compounds. The total exchange interaction of a given site with all other sites (J/sub o/) is calculated by the linear-muffin-tin-orbital method using the local force theorem…
Abstract Poly( L ‐lactide‐co‐β‐malic acid) was obtained after the hydrogenolysis of the copolymer of L ‐lactide (L‐LA) and β‐benzyl malate (MA). 1 H‐NMR demonstrated that the composition of the copolymer was identical to the feeding dose. Thermal property study revealed the morphology of the copolymer could be changed…
Abstract The syntheses of a series of novel tetrathiafulvalene derivatives substituted with four side‐chains terminating in hydrophilic amidoalcohol (arborol) groups are reported, for example the tetrathiafulvalene derivative 15 . Some of these arborol derivatives formed thin films by spin‐coating from methanol soluti…
Abstract. Three molecular theories are used to prediet the yield behavior of amorphous polymers for a wide range of temperatures and strain rates. These include the state transition theory of Ree-Eyring, the conformational change theory of Robertson and the disclinations theory of Argon. For each of these models, the…
The capacity of temperature modulated differential scanning calorimetry (TMDSC) technique to determine dynamical parameters is tested on several glass-formers of different fragility. We show that both the fragility index m and the stretching exponent β deduced from TMDSC are consistent with results from other spectros…
Plasma pressure consolidation (PPC) was used to synthesize exchange coupled composite magnets. The magnets were processed from a mixture of micrometer-size, anisotropic magnetically hard SmCo/sub 5/ and nanometer size magnetically soft Fe particles. High density magnets were obtained by PPC at a temperature as low as…
A Pb/sub 1-x/Lax(Zr/sub y/Ti/sub z/)/sub 1-x/4/O3(PLZT) electrooptic ceramic variable-rotatable waveplate and a compact inline polarimeter have been used to develop a fast feed-forward-controlled module for the continuous and complete conversion of polarization. This requires the control of only two parameters: the di…