Materials Literature
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Background data are presented that support a concept for galvanic and ion exchange release of cathodic (oxygen reduction) corrosion inhibitors from conducting polyaniline (PANI). Such inherently conducting polymers can be potentially formulated into protective coatings for Cu-rich aluminum alloys. The results show tha…
This work investigates the C K-edge x-ray absorption near-edge structure (XANES), valence-band photoelectron spectroscopy (PES), and Fourier transform infrared (FTIR) spectra of Si-doped hydrogenated amorphous carbon films. The C K-edge XANES and valence-band PES spectra indicate that the sp2∕sp3 population ratio decr…
This study was undertaken to obtain a picture of the environmental quality of 6 springs in the Ligurian Alps, situated within the Natural Reserve of the Upper Pesio and Tanaro Valleys in the Piemonte Region of NW Italy. Benthic diatom communities were sampled in Spring, Summer and Autumn of 2001. Based on 98 identifie…
Abstract Biodegradable blend films containing sodium alginate, polyvinyl alcohol and glycerol, for agricultural applications, were prepared by casting of aqueous solutions. Since the mechanical properties of alginate are not suitable for agricultural applications, the addition of polyvinyl alcohol and glycerol was nec…
Abstract A series of poly(propylene) silica‐grafted‐hyperbranched polyester nanocomposites by grafting the modified hyperbranched polyester (Boltorn™ H20), possessing theoretically 50% end carboxylic groups and 50% end hydroxyl groups, which endcapped with octadecyl isocyanate (C19), onto the surface of SiO 2 particle…
Copolymers of 2-methacryloyloxyethyl phosphorylcholine (MPC) showed good hemocompatibility as hypothesized. The hypothesis was surfaces having phosphorylcholine groups by polymerization of MPC could accumulate phospholipids from blood stream and show good blood compatibility. We designed and prepared a methacylate hav…
Ceramic samples of LaSr 2 Fe 3 - y Cr y O 8+ δ ( y = 0, 0.3, 0.6, and 1.0) were characterized with X-ray powder diffraction, thermal gravimetry, dilatometry, and total conductivity measurements in the temperature range 750−950 °C at oxygen partial pressures between 10 - 22 and 0.5 atm. When prepared in air, the doped…
In this paper, we present a new statistical analysis method of phase-resolved partial discharge (PD) measurements for the quality assessment of electrical insulation in high-voltage machinery. The method is based on a supervised classification approach which utilizes histogram similarity analysis. The motivation for c…
Complexes of silver in the oxidation states II and III are frequently considered to be unstable and rare. However, the silver complexes of porphyrins, corroles, and carbaporphyrins are stable and well characterized examples of silver in these high oxidation states. Moreover, these complexes should not be regarded as e…
This paper describes seven new Gomphonema species from the Himalaya and provides information about their ecology with respect to water chemistry and habitat character. Diatoms were collected during surveys of over 200 Himalayan streams between 1993 and 2000. The geographical distribution, which covers a 1000 km east-w…
CdS nanoparticles with average radius Ro = 2.2 nm have been investigated by Raman scattering measurements. The nanoparticles, synthesized using aqueous solution precipitation, are small enough to show effects due to confinement. In the Raman spectra of CdS nanoparticles an asymmetric Raman line was observed. The domin…
Crystallisations are frequent process steps in the manufacture of active pharmaceutical ingredients (APIs). They are the primary means of intermediate or product formation and separation to achieve the desired purity and form. These unit operations are complex processes which are difficult to control due to the interl…
Abstract The thermal conductivity of ceramic powder packed beds was measured at temperatures below 100 °C for various powder sizes and compositions and under different gas atmospheres. Measurements at low pressures (down to 10 Pa) combined with a theoretical model allowed the elucidation of geometrical and thermal res…
The synthesis of new lipophilic meso-tetraarylporphyrins bearing cardanol is described; cardanol is both a dangerous pollutant and renewable, widely available, relatively low-cost natural material obtained as a byproduct of the cashew industry for the edible use of cashew kernel. Such compounds exhibited unusual chemi…
We have applied Raman spectroscopy to study the influence of thermal strain on the vibrational properties of polycrystalline Ba0.5Sr0.5TiO3 films. The films were grown by rf magnetron sputtering on Pt∕SiO2 surface using different host substrates: strontium titanate, sapphire, silicon, and vycor glass. These substrates…
Abstract State of the art is presented in the field of structure analysis of aperiodic crystals. Based on the superspace theory that recovers translation periodicity of aperiodic crystals in a (3 + d )-dimensional space, generalized crystallographic methods have been developed that work analogous to standard tools in…
The polytype structures of the three 1:1 dioctahedral phyllosilicates found in nature, kaolinite, dickite, and nacrite, have been investigated, using first-principle calculations within density functional theory. The crystal structures were calculated by being optimized with relaxation of all atomic positions. The cal…
Two recombinant collagen-like proteins consisting of cell adhesion domains derived from native type I collagen were designed and synthesized by a genetic engineering method. The cross-linking sequence, GPPGPCCGGG, derived from collagen III was used to promote triple helix formation through the disulfide bonds formed a…
Glucose, enzymatically released from pulp fiber sludge, was combined with inorganic salts and used as a growth medium for Alcaligenes eutrophus, a gram-negative strain producing poly(3-hydroxybutyrate) (PHB). By controlling the concentrations of the inorganic salts in the growth medium, almost 78% of the cell mass was…
Results concerning the compatibilization and the chemical-physical characterisation of blends of PET and polyolefins (HDPE, PP) obtained from postconsumer packaging materials are presented. The blend compatibilization was carried out by melt mixing and extrusion processes in the presence of a variety of polyolefins fu…