Materials Literature
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Soon after the discovery of antiferroelectric liquid crystals, Orihara and Ishibashi proposed a theoretical model for these systems. The model allows for three simply modulated structures: the ferroelectric, the antiferroelectric and the structure with ferrielectric properties. In the region where neither of simply mo…
The optical spectrum of the cubic helimagnetic metal FeGe has been investigated in the frequency range from $0.01\phantom{\rule{0.3em}{0ex}}\text{to}\phantom{\rule{0.3em}{0ex}}3.1\phantom{\rule{0.3em}{0ex}}\mathrm{eV}$ for different temperatures from $30\phantom{\rule{0.3em}{0ex}}\text{to}\phantom{\rule{0.3em}{0ex}}29…
In order to enhance the feasibility of in-vessel retention (IVR) of molten core material during a severe accident for high-power reactors, an in-vessel core catcher (IVCC) was designed and evaluated as part of a joint United States-Korean International Nuclear Energy Research Initiative (INERI). The proposed IVCC is e…
The objective of this paper is to model the energy consumed in generating cellulose microfibres, 1 μm in diameter, as reinforcing agents, by refining bleached softwood kraft pulp in a PFI mill. An average initial fibre diameter of 13 μm was assumed. 125,000 revolutions in a PFI mill was found to produce a high yield o…
Tilted columnar biaxial thin films were fabricated by thermally evaporating tris(8-hydroxyquinoline) aluminium (Alq3) at oblique angles of incidence α≥65° measured from the substrate normal. Variable angle spectroscopic ellipsometry and Bruggeman effective medium approximations were used to characterize the structure…
The objective of this paper is to model the energy consumed in generating cellulose microfibres, 1 μm in diameter, as reinforcing agents, by refining bleached softwood kraft pulp in a PFI mill. An average initial fibre diameter of 13 μm was assumed. 125,000 revolutions in a PFI mill was found to produce a high yield o…
In this study, we provide evidence of surface ferromagnetism in a thin metallic Mn:Ge(111) layer displaying a $(\sqrt{3}\ifmmode\times\else\texttimes\fi{}\sqrt{3})R30\ifmmode^\circ\else\textdegree\fi{}$ reconstruction. Magnetic circular dichroism effects are observed in remanence below the Curie temperature in both x-…
Gold nanoparticle-(AuNP)-modified carbon graphite surfaces have been prepared by simple immersion of highly oriented pyrolytic graphite (HOPG) in hexane solutions containing 3 nm diameter butanethiol- or nonanethiol-capped nanoparticles. The AuNP adsorb on the HOPG surface free of unbounded thiols, remaining unchanged…
Desosamine is a 3-(dimethylamino)-3,4,6-trideoxyhexose found in certain macrolide antibiotics such as the commonly prescribed erythromycin. Six enzymes are required for its biosynthesis in Streptomyces venezuelae. The focus of this article is DesV, which catalyzes the PLP-dependent replacement of a 3-keto group with a…
ATTENTION IS DRAWN to recent reports identifying a possible link between a new scleroderma-like disorder and exposure to gadolinium-containing agents used in MRI in patients with end-stage renal disease. A press release dated May 29, 2006 issued by the Danish Medicines Agency presented a possible causal connection bet…
A series of liquid-crystalline polysiloxanes synthesized by cholest-5-en-3-ol (3beta)-10-undecenoate and 4'-octanoyloxy-biphenyl-4-yl 4-allyloxy-3-sulfo-benzoate were prepared in a one-step reaction with sulfonic acid group contents ranging between 0 and 2.73 wt %. All the polymers displayed smectic mesophases with a…
Abstract A new process for converting sulfur dioxide to elemental sulfur by reaction cycles involving calcium sulfide and calcium sulfate without generating secondary pollutants was developed at the University of Utah. In this process, sulfur dioxide is reacted with calcium sulfide to produce elemental sulfur and calc…
Evaluation of phase transitions in a series of hydrogen sulfates (Rb3H(SO4)2, (NH4)3H(SO4)2, K3 H(SO4)2, and Na3H(SO4)2) based on the single-crystal structure analysis has revealed the exact nature of such transitions and has sorted out the various ambiguities involved in earlier literature. Rb3H(SO4)2 at 293 K is C2/…
Abstract Carbaporphyrinoids provide a suitable macrocyclic platform for organometallic investigations that provide unique opportunities for modifying a macrocyclic structure. Alteration of a coordination core is a route of choice for stabilizing unusual metal ion oxidation states and coordination geometries. This micr…
Magnetic resonance imaging was used for two-dimensional temperature visualization of chemical waves propagation in the autocatalytic exothermal reaction of thiosulfate oxidation by chlorite. The technique presented is based on the temperature dependence of the water chemical shift. Temperature maps were acquired by em…
Nonthermal plasma-assisted methane conversion has been widely investigated as a potential low-temperature process. The desired end objective is synthesis gas production, one-step production of liquid oxygenates, or coupling products. Either oxygen or steam or both is used as a second reactant or reactants, to provide…
Over the last few years, renewed interest has been raised by the simplified general interaction models proposed by Straley for mesogenic molecules possessing the D{2h} symmetry and capable of producing biaxial nematic order. It has already been shown that, in the presence of certain special symmetries, just two out of…
Abstract A mathematical model was developed to investigate the coupled transport and electrochemical reactions in a nickel‐yttrial‐stablized zirconia (Ni‐YSZ) anode for use in solid oxide fuel cells (SOFCs). The modeling results were consistent with experimental data from the literature. Comparison between conventiona…
Isocyanurate-containing silsesquioxane-bridged periodic mesoporous organosilicas (ICS−PMOs) were synthesized by self-assembly of the nonionic surfactant P123, EO 20 PO 70 EO 20, and trimethoxysilyl-functionalized isocyanurate (ICS−Si) under acidic conditions in the presence of inorganic additives. The ICS−PMOs have be…
In this work, the crystal growth kinetics of ZnS nanoparticles coarsened under 100 degrees C with NaOH concentration from 2 to 8 M was investigated, aiming to study the role of NaOH concentration on the oriented attachment growth kinetics. It reveals that 2 M NaOH is sufficient to lead to two-stage growth kinetics of…