Materials Literature
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Silica-pillared layered manganese oxide with high surface area and high thermal stability was first synthesized from birnessite(H)-type manganese oxide by intercalation of octylamine followed by tetraethyl orthosilicate (TEOS) molecules and then by solvothermal treatment in TEOS liquid. Layered phases of manganese oxi…
In the absence of coalescence, coarsening of emulsions (and foams) is controlled by molecular diffusion of the dispersed-phase species from one emulsion droplet (or foam bubble) to another. Previous studies of dilute emulsions have shown how the osmotic pressure of a trapped species within droplets can overcome the La…
Charge optimization methods facilitate examination and, potentially, improvement of electrostatic interactions between binding partners. Here charge optimization was applied to the chorismate mutase from Bacillus subtilis binding an endo -oxabicyclic transition-state analogue. Electrostatically optimized templates bas…
The solubilities of the disodium salt hemiheptahydrate of ceftriaxone in water + ethanol at (10, 20, and 30) °C are presented by using the gravimetrical method. The densities of the saturated solutions are also determined with a digital densimeter (Anton Paar, model DMA 45) at 30 °C. The solubility of the disodium sal…
The pore-opening size of MCM-41 is tailored to be in the microporous region using a chemical vapor deposition technique for selective tailoring. Although the pore opening is narrowed, the internal pore body of MCM-41 remains unchanged so the pore volume retains a substantial portion (80%) of its original value. The ad…
Au, Ag, and Au/Ag colloidal nanoparticles coated with the J-aggregate of an anionic cyanine dye, 3,3‘-disulfopropyl-5,5‘-dichlorothiacyanine sodium salt (TC), have been prepared for the first time. The absorption spectrum of TC-coated Au colloidal nanoparticles is not a simple sum of the contributions of colloidal gol…
ZnO nanopillars have been electrodeposited epitaxially onto Au(111), Au(110) and Au(100) single-crystal substrates. The nanopillars grow with the same [0001] out-of-plane orientation on all three substrates. The in-plane orientation was probed by X-ray pole figure analysis. The pole figures had six peaks on Au(111) an…
MCM-41 silica particles with several morphologies have been controllably synthesized with a basic medium. Nanospherical MCM-41 silica with an average size of 110 nm was produced through reaction of extremely low surfactant concentrations of CTAB with TEOS in the sodium hydroxide medium at 353 K, while a submicrometer-…
Exceptional complex Lie groups have become increasingly important in various fields of mathematics and physics. As a result, there has been interest in expanding the representation theory of finite groups to include embeddings into the exceptional Lie groups. Cohen, Griess, Lisser, Ryba, Serre and Wales have pioneered…
Multilayer structures with depth-graded spacing can show a high reflectivity in a broad energy passband for hard X-rays if the interface roughness/diffuseness is controlled and minimized. We present a study of several multilayer systems deposited by DC magnetron sputtering on <111> silicon wafers and superpolish…
Eine monotrope smektische A-Phase bilden Addukte aus Tris(β-diketonato)lanthanoid(III)-Komplexen und einer nichtmesomorphen Salicylaldimin-Schiff-Base als Lewis-Base. Vier endständige Alkylketten in der Schiff-Base genügten, um in [La(dbm)3] mesomorphe Eigenschaften zu induzieren (siehe Formel). Hdbm=1,3-Diphenyl-1,3-…
Previous experimental studies showed that the presence of O 2 greatly enhances NO−carbon reaction while it depresses N 2 O−carbon reaction on carbon surfaces. A popular explanation for the rate increase is that the addition of O 2 results in a large number of reactive carbon−oxygen complexes, and decomposition of thes…
Hydrothermal reaction of iron(III) chloride, barium chloride and sodium oxalate in a narrow stoichiometry range produces the title compound Ba4(C2O4)Cl2[[Fe(C2O4)(OH)]4] (1). This new iron(II) oxalate crystallises in the tetragonal space group P42/mnm: a = 13.811(3), c = 7.026(2) A. The structure consists of parallel…
The convergent synthesis of a series of polycationic aryl ether dendrimers has been accomplished by a convenient procedure involving quantitative quaternarization of aryl(poly)amine core molecules. The series has been expanded to the preparation of the first polycationic, mixed core-shell dendrimer. All these dendrime…
The self-initiated structural transition from an initially formed α-helix structure to a β-sheet structure is the prerequisite for the spontaneous assembly of complementary peptide pairs into amyloid fibrils. The heterogeneous assembly is accomplished by favorable electrostatic interactions between pairs of designed p…
Magnetic resonance angiography (MRA) has put forth an impetus for the development of macromolecular GdIII complexes that have a prolonged lifetime in the vascular system. Herein, we report the synthesis and GdIII complexation of a new sugar conjugate based on inulin and the DO3A ligand (DO3A = 1,4,7,10-tetraazacyclodo…
We report a new clathrate phase composed of europium atoms occupying cage voids in a gallium/germanium tetrahedral cage network. Eu 4 Ga 8 Ge 16 crystallizes in orthorhombic space group Cmcm with a = 4.1349(6), b = 11.2842(15), and c = 13.2408(18). The compound is believed to satisfy the Zintl−Klemm concept of bonding…
The polymerization-filling technique has been used to coat glass beads by a polyolefinic layer. This precoating allows for improving the mechanical properties of polyethylene composites prepared by melt-blending HDPE with the surface-modified filler. As a typical example, a 10-fold increase of the impact resistance ha…
The synthesis, characterization, and metal-binding studies of chelate-functionalized dendrimers is reported. Salicylate, catecholate, and hydroxypyridinonate bidentate chelators have been coupled to the surface of both poly(propyleneimine) (Astramol) and poly(amidoamine) (Starburst, PAMAM) dendrimers up to the fifth g…
Solid-state 31 P/ 27 Al and 31 P/ 23 Na TRAPDOR NMR experiments have been used to investigate the spatial distribution of aluminum and sodium cations with respect to the phosphate backbone for a series of sodium aluminophosphate glasses, x Al 2 O 3 ·50Na 2 O· (50− x )P 2 O 5 (0 ≤ x ≤ 17.5). From the 31 P/ 27 Al and 31…