Materials Literature
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We have determined the shape of the miscibility gap of the Cu–Al–Mn alloy system along the Cu3Al → Mn composition line ((Cu3Al)1 − x Mnx with 0 ⩽ x ⩽ 1) using electrical resistance measurements. Electrical resistance measurements have also been used to study the kinetics of the phase separation that takes place within…
Because of unevenness of moisture fields inside a rice kernel, the key to applying the glass transition hypothesisto explain fissure formation is to map glass transition zones inside rice kernels during the drying process based on the intra-kernel moisture content distribution generated by a finite element scheme. The…
Reaction of [Ni(rac-CTH)(ClO(4))(2)](rac-CTH = rac-5,7,7,12,14,14-hexamethyl-1,4,8,11-tetraazacyclotetradecane) with NaN(3) and Cu(NO(3))(2).3H(2)O produces the binuclear complex [Ni(rac-CTH)(mu(1,1)-N(3))(2)Cu(N(3))(2)] 1, which represents the first example of an end-on bridged bimetallic complex; 1 exhibits intramol…
This study investigates the objective hand evaluation of the toilet paper based on the mechanical and surface properties. The objective hand evaluation system for men's suiting was applied to assess the hand of toilet paper. Three primary hand values (stiffness, smoothness, and fullness) for the toilet paper were obta…
We have been studying the reduction of carbonyl compounds by using heterogeneous catalysts in the liquid phase. The reducing reagents were simple primary or secondary alcohols, e.g. 2-propanol. The supported Sn and Zr oxides catalysts were active and selective for the reduction of crotonaldehyde (C4-unsaturated aldehy…
Polysulfone (PSf) membranes that covalently conjugated with aspartic acid (ASP-PSf) were prepared and analyzed for hemocompatability. Compared to PSf or other types of surface-modified PSf membranes, the ASP-PSf membranes had a reduced ability to adsorb protein from either a plasma solution or a mixed solution of albu…
Shape memory alloys based on the intermetallic system Nickel-Titanium (NiTi or NiTinol) are widely used in various kinds of industries. At present, the most popular market is medical industry, in which NiTinol finds a perfect environment with a narrow temperature specification ranging from room to body temperature. In…
Encouraged by theoretical predictions that nematic phases formed from V-shaped compounds could be biaxial, shape-persistent phenylene ethynylene arms linked by 1,3-phenylene, 4,4′-diphenylenemethane and 3,6-fluorenone units have been synthesised. Crystallisation and micro-segregation is prevented by 2,5-alkoxy substit…
For the first time, HF-EPR (94.5 GHz) spectroscopy has been used to determine crystal field parameters in chromium(III) coordination compounds. The large zero-field splitting parameters of the dark-green photochromic trans-RSSR-[CrCl(2)(cyclam)](2)ZnCl(4), 1, the red-purple trans-RSSR-[CrCl(2)(cyclam)]Cl, 2, and the r…
Treatment of octakis(octylthio)porphyrazine (H(2)OOSPz) with cis-bis(benzonitrile)dichloroplatinum(II) in a 1,2,4-trichlorobenzene (TCB)-n-BuOH mixture at 190 degree C affords the asymmetric porphyrazine 2H-heptakis(octylthio)porphyrazine, H(2)HOSPz, in ca. 40% yield. In the key synthetic step the two-electron reduced…
We describe a new method to isolate and concentrate transparent exopolymeric particles (TEP), either naturally occurring or produced by phytoplankton in cultures. The principles of this method are to use TEP‐sticking properties coupled with magnetic properties of paramagnetic microspheres to magnetically and selective…
Hydroxyapatite (HA) is widely used as a bioactive ceramics since it forms a chemical bonding to bone.The disadvantage of this material is its poor mechanical properties.HA can be degraded in body, which is the reason for its bioactivity, but too fast degradation rate could cause negative effects, such as macrophage pr…
En este trabajo se presentan los resultados de la caracterizacion del quitosano obtenido a partir de la modificacion quimica de la quitina. Se ha aplicado el metodo de viscosimetria capilar para determinar el peso molecular promedio viscoso, a partir de la ecuacion de Mark-Houwink; la tecnica de analisis fue validada…
In order to enhance the understanding of the redox equilibriums of uranyl ions in molten NaCl-2CsCl eutectic salt UV-Vis absorption spectrophotometry measurements were performed for UO2 2+ in molten NaCl-2CsCl at 923 K under simultaneous electrolytic control of their ratio. A prominent absorption band at 395 nm was as…
Sol-gel-derived P 2 O 5 SiO 2 glasses were investigated to prepare high proton conductors for fuel cell electrolyte. Glasses with a pore size of 2-30 nm diam were prepared using Si ( OC 2 H 5 ) 4 , colloidal silica, PO ( OCH 3 ) 3 , H 3 PO 4 , and POCl 3 , the pore properties of which were discussed to relate with t…
The conducting polypyyrole-montmorillonite clay (PPy/MMT) composites were prepared using 2: 1 mole ratio of FeCl3 / pyrrole with various percentages of MMT clay in aqueous medium. The prepared samples were subjected to structural, thermal and morphological characterizations and d.c. conductivity measurement. The condu…
Abstract The parameters that promote the formation of surface defects on multi‐phase polymer systems during injection molding are not yet clearly understood. The objective of this work is to establish the influence of composition, particularly the role of rubber, on the rheological properties of such multi‐phase syste…
Polyvinylalcohol, partially substituted with lipophilic acyl chains, generates polymeric micelles in aqueous phase, containing a hydrophobic core able to encapsulate lipophilic drugs. Two types of polymers were obtained by conjugation of polyvinylalcohol with oleoyl or linoleoyl chains as pendant groups. The polymers,…
C18H37OH–C20H41OH is an example of a binary system showing isopolymorphism. The two alkanols display the same polymorphic behaviour. At low temperatures, they crystallize into the same ordered form γ (C2/c, Z = 8). On heating, γ transforms into the rotationally disordered form R′IV (C2/m, Z = 4), at a few degrees belo…
Experiments were conducted to evaluate the superplastic properties in three orthogonal directions after processing by equal-channel angular pressing (ECAP). Using an Al-3% Mg-0.2% Sc alloy pressed to a strain of ∼8 through route BC, miniature tensile specimens were cut inthe pressing direction perpendicular to the tra…