Polycatenar, bent-core pyridines and their discotic complexes with silver(I)
New, bent-core, polycatenar pyridine mesogens are described. Binding to silver(I) leads to complexes properly described as discotic.
Materials Literature
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Antibiotic Treatment of Silk to Produce Novel Infection-Resistant Biomaterials
Dye-like applications of antibiotics to silk produce infection-resistant materials for potential use in biomedical applications. Two antibiotics, doxycycline (doxy) and cipro floxacin (cipro), are applied under a variety of conditions to silk and to silk that has previously been hydrolyzed at 40°C for 20, 40, and 60 m…
Intramolecular C−H···π Interactions in Metal-Porphyrin Complexes
Cambridge Structural Database (CSD) was screened in order to find intramolecular C−H···π interactions with a chelate ring of coordinated porphyrin. It was found 154 crystal structures with 244 intramolecular C−H···π interactions in transition metal complexes with derivatives of porphyrin. Comparison of interacting dis…
Recent Advances to the Development of Low‐Temperature Solid Oxide Fuel Cells
Abstract While existing solid oxide fuel cell (SOFC) technology has demonstrated much higher energy efficiency with minimal pollutant emission than the conventional technologies, the costs of the current SOFC systems are still prohibitive for broad commercialization. To be economically competitive, both the cost of ma…
The Effect of Neutron Flux on Radiation-Induced Embrittlement in Reactor Pressure Vessel Steels
Abstract The effect of neutron flux level is a longstanding concern for determining the applicability of test reactor data or high lead-factor surveillance data to the prediction of embrittlement in commercial reactor pressure vessels (RPV). However, as operating reactors reach higher fluences, the question of flux ef…
Self-organization in nanocomposites based on detonation nanodiamonds
The effect of modifying detonation nanodiamond additives on the stress-strain properties of polymer nanocomposites is investigated using polysiloxane polyblock copolymers as an example. It is shown that the formation of a physical network of supramolecular structures (due to self-organization initiated by force fields…
Chemical mechanical modification of nanodiamond in an aqueous system
The effect of chemical-mechanical modification (CMM) on the ζ potential and size distribution of nanodiamonds was studied. Results show a significant change in the functional groups on its surface after CMM treatment by the anionic surface modifier DN-10. The amount of hydroxyl groups decreases, and two peaks connecte…
Influence of Intermediate-Range Order on Glass Formation
The subpeak was first observed in glassy Fe−Al ribbons. The origin of the subpeak is not due to the system size, but it is consequence of the occurrence of local atomic structural order. The usual stability of undercooled liquids against crystallization is explained by means of local atomic structural order. Direct ex…
TARKIANITE, (Cu, Fe)(Re, Mo)4S8, A NEW MINERAL SPECIES FROM THE HITURA MINE, NIVALA, FINLAND
Tarkianite, a new mineral species of ideal composition (Cu,Fe)(Re,Mo)4S8, was recently discovered in sulfide concentrate from the Hitura Ni–Cu–PGE mine, Nivala, western central Finland. It is associated with pyrrhotite, pentlandite, valleriite, chalcopyrite, cubanite, mackinawite, chromite, and the PGE minerals sperry…
Hydrogenation of Styrene‐Butadiene Rubber Catalyzed by Ru(CHCHPh)Cl(CO)(PCy3)2
Abstract Summary: The hydrogenation of a copolymer of styrene and butadiene (SBR) catalyzed by Ru(CHCHPh)Cl(CO)(PCy 3 ) 2 was experimentally investigated within the temperature range of 120–160 °C, at P of 300–1 200 psi, and a catalyst concentration of 10–78 × 10 −6 M . Special attention was paid to minimizing the ca…
Achromatic polarization switch using a film-compensated twisted nematic liquid crystal cell
A broadband polarization switch consisting of an active twisted nematic liquid crystal cell and two passive uniaxial compensation films is analysed. The conjugate gradient method was used for optimizing the device parameters. Simulation results indicate that the polarization switch exhibits a broad bandwidth and high…
Detonation diamonds in Ukraine
Some information on the history of dynamic synthesis of diamond in Ukraine is considered. Basic characteristics of ASM5 0.1/0 and ASM1 0.1/0 nanodiamond powders produced by static synthesis are described. The characteristics and surface properties of nanodiamond powders produced by detonation synthesis in Ukraine are…
Embden–Meyerhof–Parnas and Entner–Doudoroff pathways in Thermoproteus tenax: metabolic parallelism or specific adaptation?
Genome data as well as biochemical studies have indicated that--as a peculiarity within hyperthermophilic Archaea--Thermoproteus tenax uses three different pathways for glucose metabolism, a variant of the reversible EMP (Embden-Meyerhof-Parnas) pathway and two different modifications of the ED (Entner-Doudoroff) path…
Direct observation of the crossover from α-relaxation to Rouse dynamics in a polymer melt
In this letter we report a large experimental effort exploring the dynamics of poly(vinyl ethylene) on length scales covering Rouse dynamics and below. The results establish the simultaneous existence of a generic sublinear diffusion regime which underlies the α-process in addition to the Rouse process. Both regimes a…
Corrosion Protection by Electropolymerised and Polymer Pigmented Coatings - A Review
The aqueous electropolymerisation process can be used for the production of primer coatings on metals. Recent studies have shown that such types of coatings are highly corrosion resistant. Further it is also shown that electropolymerisation coating with pigment is feasible. Besides, the use of polymers such as polyani…
Synergistic effects of carbon fillers on tensile and impact properties in nylon 6,6 and polycarbonate based resins
Abstract Electrically and thermally conductive resins can be produced by adding conductive fillers to insulating polymers. Mechanical properties such as tensile modulus, ultimate tensile strength, strain at ultimate tensile strength, and notched Izod impact strength are also important and cannot be ignored. This resea…
Formation of a fibrillar morphology of crosslinked epoxy in a polystyrene continuous phase by reactive extrusion
Abstract An immiscible polymer blend where the dispersed phase is fibrillar was prepared by in situ crosslinking of the minor phase. A model polystyrene/epoxy‐amine blend was selected on the basis of rheological (achievement of the fibrillar structure) and reactivity (fast crosslinking) criteria. The system was a poly…
Diamond-to-graphite conversion in nanodiamond and the electronic properties of nanodiamond-derived carbon system
Heat-treatment-induced conversion of nanodiamond to nanographite is investigated. Graphitization starts at the surface region around a heat-treatment temperature of 900°C, then it proceeds inward in the particle, and finally it is completed around 1600°C, where nanographite particles form a polyhedron with a hollow in…
Colloidal silver as an antimicrobial agent: fact or fiction?
OBJECTIVE: Colloidal silver preparations are marketed on the internet as omnipotent antimicrobial agents, but scientific support for these claims is lacking. This study reports the results of in vitro tests of colloidal silver's antimicrobial activity against several pathogenic or non-pathogenic microorganisms. METHOD…
Tetrakis(diethyl‐phosphonat)‐, Tetrakis(ethyl‐phenylphosphinat)‐ und Tetrakis(diphenylphosphin‐oxid)‐substituierte Phthalocyanine
Abstract Tetrakis(diethyl phosphonate), Tetrakis(ethyl phenylphosphinate)‐, and Tetrakis(diphenylphosphine oxide)‐Substituted Phthalocyanines The title compounds 7, 9 , and 11 are obtained by tetramerization of diethyl (3,4‐dicyanophenyl)phosphonate ( 5 ), ethyl (3,4‐dicyanophenyl)phenylphosphinate ( 8 ), and 4‐(diphe…