Materials Literature
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The thermal decomposition of halogenated unsaturated polyester resins (UPRs), flame retarded by zinc hydroxystannate and cross-linked with styrene, has been investigated by thermogravimetry (TG) in both dynamic and isothermal mode, and by TG coupled on-line with Fourier transform infra red spectroscopy (TG-FTIR) or ma…
Caustic nuclear wastes have leaked from tanks at the US Department of Energy’s Hanford site in Washington State (USA) causing hundreds of thousands of gallons of waste fluids to migrate into the underlying sediments. In this study, four simulant tank waste (STW) solutions, which are high in NaOH (1.4 and 2.8 mol/kg),…
Thermal analysis of a lipid-like bilayer of [(CH 2 ) 9 (NH 3 ) 2 ]CuCl 4 indicates one minor transition at 303 K and the following five major ones (with entropies in J/K-mole): The initial magnetic susceptibility at 320 Hz and a magnetic field of 160 A/m in the temperature range 75 - 290 K revealed a Curie-Weiss behav…
Abstract Optical birefringence measurements for a calamitic lyotropic liquid crystal containing sodium lauryl sulphate/decanol/water are presented. A value of the order of 10 ‐3 was obtained, much smaller than that of thermotropic liquid crystals. The order parameter temperature dependence is evaluated using an extrap…
Shunsuke KobayashiJun XuHirokazu FurutaYuji MurakamiSatoru KawamotoMasafumi Oh-kouchiTokyo University of ScienceLiquid Crystal Institute and the GraduateSchool of Engineering ScienceYamaguchi, OnodaYamaguchi 756-0884, JapanHiroshi HasebeHaruyoshi TakatsuDainippon Ink. and Chemical Ind.Ina-machi, Kitaadachi-gunSaitama…
Drape is one of the most important fabric aesthetic properties. Although there are many studies related to the drape structure of seamless fabrics, knowledge about the drape behavior of seamed fabrics is very limited. This study analyzes the effect of five-thread overlock seams (stitch type 516, seam type Ssa-1) on th…
Micro-Raman spectroscopy of porous silicon films of micrometre thickness and on silicon bulk substrates is carried out. The practical information is given for applications of stress measurements in the films which were obtained with electrochemical etching technique. Higher residual stress (reached GPa) in the etched…
Abstract The effect of electron beam (EB) irradiation on the properties and compatibility of poly(ethylene 2,6‐naphthalate) (PEN)/poly(ethylene terephthalate) (PET) blends was investigated. Upon EB irradiation, PEN/PET blends underwent transesterification reactions, resulting in the formation of more random copolymers…
Abstract The spin states of microcrystalline samples of [Fe(OMTPP)L 2 ] + (L = DMAP or Py) have been examined and interpreted using Mössbauer spectroscopy, SQUID magnetometry and X‐ray crystallography. The Mössbauer spectra of [Fe(OMTPP)(DMAP) 2 ] + and [Fe(OMTPP)Py 2 ] + showed that both of these complexes maintain t…
Colloidal semiconductor nanocrystals (quantum dots, QDs), such as CdSe-ZnS core-shell, are highly luminescent and stable inorganic fluorophores that represent a promising alternative to organic dyes for a variety of biotechnological applications. They show size-tunable narrow photoluminescence spectra spanning nearly…
Coupons of fourteen different stainless steels were investigated in terms of surface chemistry and ease of cleaning. Steel surfaces were exposed to Bacillus cereus spores in static saline solution for 2 h. Surfaces were rinsed and then covered with whole milk and allowed to dry. Surfaces were then cleaned in an experi…
Abstract Summary: Poly(propylene oxide)‐amidoacids were used to intercalate montmorillonite clay to afford organoclays with an X‐ray basal spacing as wide as 81 Å. Differing from the ionic exchange between quaternary ammonium salts and the metal ions in clays, the intercalation mechanism involves a beta‐amidoacid chel…
We studied the adhesion and proliferation of human umbilical-vein endothelial cells (HUVEC) and human aortic smooth-muscle cells (HASMC) on modified polymer samples. The polymers under investigation were either PTFE (polytetrafluoroethylene) or PET [poly(ethylene terephthalate)], which are among the most frequently em…
Abstract Fourier‐transform infrared spectroscopy has been employed to investigate the adsorption and photo‐oxidation of CH 4 over powdered TiO 2 . The interaction between the CH 4 and TiO 2 surface is weak. It is found that no CH 4 molecules are adsorbed on the surface at 35 °C in a vacuum. Under UV irradiation, CH 4…
The adsorption structure and binding of phenyl isocyanide (PNC), 2,6-dimethyl phenyl isocyanide (DMPNC), and benzyl isocyanide (BZI) on gold nanoparticle surfaces have been studied by means of surface-enhanced Raman scattering (SERS). PNC, DMPNC, and BZI have been found to adsorb on gold assuming a standing geometry w…
meso-aryl expanded porphyrins, that can be regarded as real homologues of meso-tetraaryl porphyrins, were prepared by our synthetic protocol under the modified Rothemund-Lindsey conditions. This new class of molecules exhibits interesting spectral, electrochemical, and coordination properties. These promising features…
Although doped regions in semiconductors have been shown to give a different secondary electron yield in low-voltage scanning electron microscopy, the basic interpretation of this contrast has been difficult. It is accepted that this contrast stem from electronic phenomenon rather than atomic number differences betwee…
Abstract The aerobic aqueous solution syntheses and structures of monomeric and polymeric Mn II complexes containing the oxydiacetate ligand [O(CH 2 COO) 2 2− = oda] are reported. The magnetic properties of the polymeric products have also been investigated. The initially obtained species [{Mn(oda)(H 2 O)}·H 2 O] n (…
Measurements are reported of the spectroscopic properties of phosphate glasses doped with 3-, 5-, and 10-wt. % Nd3+ in the temperature range 70–300 K. The stimulated-emission cross sections of these glasses were determined by use of the Füchtbauer–Ladenburg formula at each temperature. The absorption spectra at room t…
Abstract The electronic absorption and magnetic circular dichroism (MCD) spectra, and differential pulse (DP) voltammograms of planar heterodinuclear phthalocyanine (Pc) dimers consisting of Pc and pyrazinoporphyrazine (PyZ), [Mt 2 PcPyZ (Mt = H 2 and Zn)] and of Pc and naphthalocyanine (Nc), [Mt 2 PcNc (Mt = H 2 and…