Materials Literature
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As-cast melt extracted CoFeSiBNb wires 37.5 µm in average diameter prepared by MXT Inc. of Montréal have a predominantly helical anisotropy due to residual tensile and torsional stresses quenched in during preparation. When a supplementary tensile stress is applied along the wire, its easy axis of magnetization rotate…
The effect of carbon nanotubes on the thermal decomposition of CL-20 is studied by means of DSD and TG. The results show that the addition of carbon nanotubes makes the onset temperature and peak temperature of DSC curve shift downwards, the value of activation energy thermal decomposition of CL-20 decrease from 184.3…
Using mimosa tannin as vegetable tanning agent and oxazolidine as aldehydic tanning agent,the effects of hydrogen bond,hydrophobic bond and side amino group of collagen on vegetable tanning,aldehyde tanning and vegetable-aldehyde combination tanning were investigated.Results indicated that aldehyde predominantly react…
The heat transfer performance and pressure drop of 3 different tubes under different ultrasonic power are experimentally investigated using a tube-shell heat exchanger model and the designed ultrasonic vibration device. The results show that the heat transfer coefficient increases obviously while the pressure drop dec…
By introducing an anisotropic factor in the cell dynamics of constant pressure molecular dynamics simulations, we dramatically reduce the artifacts related to cell shapes and overcome the difficulties of simulating anisotropic molecules under hydrostatic pressure. The method is especially effective for anisotropic liq…
ening, stiffening and water repellent agents have been employed. In this work, a mixture of dimethylol dihydroxy ethylene urea (DMDHEU), polyvinyl acetate (PVAc) and some other resins were examined in special finishing of cotton for producing interlining cotton fabrics properties. Majority of cross-linking agents used…
Thermal resistivity data are reported for loose-fill cellulose manufactured in Korea and the United States over the temperature range 40 to 100 F. A representative thickness of 1.1 in. for thermal test specimens was determined for cellulose insulation in the density range that was studied. Measurements for insulations…
Ba(2)CoS(3) is the first example of an inorganic solid containing one-dimensional corner-sharing [Co(2+)-anion] chains, which leads to one-dimensional cooperative antiferromagnetism.
We present the results of investigations into the utilisation of polymeric waste arising in the manufacture of polyester fibres. Polyethylene terephthalate waste of various molecu lar weights (Mv ≅ 13500 and 18000) was glycolysed under different conditions including varying the PET/EG proportion, temperature and time…
Dielectric properties of (Sr1 - xPbx)TiO3-SPT (x = 0.05, 0.10 and 0.15) and phase transitions of SPT (x = 0.05, 0.10, 0.15, 0.20, 0.25 and 0.30) ceramic samples are investigated. At 10 kHz relative permittivity of SPT(x = 0.05) has one maximum, SPT(x = 0.10) and SPT(x = 0.15) show the main relative permittivity peaks…
The purpose of this study is to examine a new method to obtain fine bamboo fibers (fiber bundles), which are used to reinforce thermoplastics instead of glass fibers. The tensile strength of FRTP was also examined using polypropylene as the matrix and bamboo fibers as the reinforcement. In this study, two types of bam…
Abstract An inorganic polymer supporter, such as molecular sieve MCM‐41, was used as a support for encapsulating metal complex catalysts. The metal complex was prepared with L ‐glutamic acid and Co(OAc) 2 · 4H 2 O. Their catalytic activity in oxidation of cyclohexene with H 2 O 2 was studied. The major products of thi…
This review is the current summary of vitamin B6 (B6) biosynthesis in Escherichia coli and other microorganisms. The de novo biosynthesis of B6 has been studied extensively for last three decades. However, the de novo biosynthesis of B6 still remains unclear in spite of its simple structure. For the first two decades,…
Phytoplankton samples were collected along the north coast of the Antarctic peninsula, the Weddell Sea and the Gerlache Strait, in different seasons in 1985, 1986, 1999, and 2000–2002. Chaetoceros castracanei Karsten, a fairly rare species was present in the samples; its morphology, taxonomy and distribution have not…
Grafting of 2-methacryloyloxyethyl phosphorylcholine (MPC) and poly(ethylene glycol mathacrylate) (PEGMA) onto cellulose films was performed using the pre-irradiation grafting method. The effects of monomer concentration, solvent system and co-solvent composition, and reaction time on the degree of grafting were deter…
Tactile sensitivity of the foot was investigated using the Semmes-Weinstein monofilament method to quantify the pressure sensory threshold. Gender differences and variations in sensitivity at various sites on the foot (inter-locational sensitivity differences) were analyzed using a nonparametric test. Skin elasticity…
The ferroelectric hysteresis in thin films is studied using a computer simulation model based on Time Dependent Ginzburg-Landau equations. The model for the polarization of ferroelectric thin film is set up with the analysis of the crystal structure and the principle of spontaneous polarization. For stress-free ferroe…
In order to clarify the influence of water vapor on evaporation and crystallization of an amorphous SiO2 scale formed on SiO2-formers, fused silica was exposed for up to 49 h at 1373—1673 K in N2-O2-H2O atmospheres. The water vapor concentration was regulated to 19.6 and 46.7% (vol%). Under conditions of low water vap…
Electrochemistry of gallium hexacyanoferrate (GaHCF) as an analogue of prussian blue having a high-potential redox system was studied. A thin film of GaHCF was directly generated on a Ga substrate surface to fabricate a modified electrode. Electrochemical behavior of the modified electrode was studied at a typical coo…
The effect of the acidity of the environment on the topography and photophysics of sensitizer molecules in homogeneous solutions, and when embedded in a lipid microenvironment, was studied. Four hematoporphyrin (HP) analogs were studied, which have chemical "spacers" of varying lengths between the chromophoric tetrapy…