Materials Literature
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A concerted experimental and computational study of 4-(dimethylamino)benzethyne, DMABE, has been carried out to probe the low-lying pisigma* state and the role it plays in the photophysics of the molecule. The subpicosecond transient absorption spectra reveal the presence of a strong excited-state absorption at about…
The 2 : 1 amino acid salt of L-alanine with nitric acid was crystallized and the vibrational spectrum measured at 25 K by incoherent inelastic neutron scattering (INS) spectroscopy. The spectrum was simulated using solid-state density functional theory based on a new 90 K structure determination. A feature observed at…
SWNTs and MWNTs have been non-covalently functionalized with glycosides in a reversible manner, and fluorescence titrations have been used to quantify the formed supramolecular assemblies which for SWNTs exhibits increased water solubility.
Besides 12 known glycosides, five new steroidal glycosides have been isolated from the stems of Solanum sodomaeum L. (Solanaceae). The chemical structures of these five glycosides were determined on the basis of spectroscopic data as well as chemical evidence, and the structure of one known steroidal glycoside was cor…
Cathodic reduction of Cu(II) lactate complex in the presence of hexadecyltrimethylammonium bromide results in the deposition of nanoparticulate Cu 2 O (crystallite size of 32–53 nm) onto the stainless steel substrate. In the absence of the surfactant, large micrometer-sized crystallites with a truncated octahedral mor…
The paper considers a wide set of issues concerning the creation of high energetic solid composite propellants causing the minimal polluting effect on the environment. Thereby, the level of toxicity of products of different compositions is discussed and propellants with perchlorates oxidizers are compared with propell…
In-plane tension and compression experiments on an austenitic stainless steel sheet SUS304 0.3 mm in thickness for electronic parts were conducted using a specially designed testing apparatus. The apparatus is equipped with comb-type dies so that stress–strain curves of a sheet specimen subjected to tension followed b…
A novel reaction route for the oxidation of thiol groups to disulfide bonds in mesoporous silicas with the aid of Cu2+ adsorption is reported for the first time, and most importantly it can serve as a diagnostic reaction for probing the spatial proximity and distribution of organic functional groups.
A new class of organic nanotubes have been assembled from simple isophthalamide derivatives and their surface can be conveniently coated with Pt, which form new Pt nanotubes after the inside organic materials are removed with hot methanol.
The synthesis, structure and magnetic properties of [Fe(14)O(4)(OH)(4)(H(2)L)(2)(HL)(4)(piv)(20)] (1) and [Fe(8)Cu(2)O(4)(H(2)L)(4)(HL)(2)(OBz)(12)] (2) are reported (H(3)L = 2-amino-2-(hydroxymethyl)propane-1,3-diol): both complexes have unique core structures and display non-zero spin ground states.
Nanostructured Al-Mg powders with 10 to 90 at.% Mg have been produced by mechanical alloying (MA) of elemental powder mixtures and mechanical milling (MM) of prealloyed ingots. Although the solid-state transformations induced by MA and MM occur by different mechanisms due to the different starting materials used, the…
We report on the coexistence of 2 different supramolecular polymorphic forms of pepsin-digested collagen type I fibrils reconstituted in vitro in the presence of heparin. Detailed structural analysis using transmission electron microscopy and scanning force microscopy shows a hierarchy involving 3 different structural…
cis–transPhotoisomerizations of 2-(9-anthrylmethylene)-1-indanones were carried out in the solid state. The photoisomerizations proceeded without destruction of the crystal lattices. The crystal structural changes accompanying the photoisomerizations were observed by X-ray diffraction analysis. From the structural cor…
Preparation of Well-Alloyed PtRu/C Catalyst by Sequential Mixing of the Precursors in a Polyol Method, Wang, Guoxiong, Takeguchi, Tatsuya, Muhamad, Ernee Noryana, Yamanaka, Toshiro, Sadakane, Masahiro, Ueda, Wataru
This paper describes the host-guest interaction between nonionic peptide lipids and solvatochromic dipolar betaine dyes in nonpolar aprotic organic solvent. We have serendipitously found that the colour of Reichardt's Dye (referred to as ET(30) hereafter, although the term ET(30) has been used as a polarity parameter)…
Protein crystals, routinely prepared for the elucidation of protein 3-D structure by X-ray crystallography, present a highly accurate 3-D array of protein molecules. Along with the formation of this array, a complementary 3-D array of voids is also formed, with pattern, geometry, and size depending on the protein "bui…
We assess the localized Hartree-Fock (LHF) method for the simulation of the structural and electronic properties of gold microclusters. We compute the minimum-energy geometries, atomization energies, dipole moments, and single-particle spectra for five gold clusters, Au(N), and their anions, Au(N)-, with N < or = 4. C…
Zr(IV)–alkyl-phosphonate and Zr(IV)–aryl-phosphonate thin films of varying compositions were investigated for corrosion inhibition capabilities on AA2024-T3. A strong correlation between the alkyl chain length and the ability of these self-assembled systems to inhibit the reduction reaction at the alloy surface was fo…
Cu/C composites were successfully fabricated by three step electro-deposition. The effects of hot pressure temperature and alloy element Fe on the interface characteristic of Cu/C composite were investigated. The results showed that the hot pressure temperature and interface characteristic have a great effect on mecha…
A Single-Chamber Microbial Fuel Cell (SCMFC) was constructed and run in a sequential feed-and-draw cycle operation. Anaerobic mixed bacterial culture and wastewater obtained from a local municipal wastewater treatment plant were used as biocatalysts and media, respectively. The SCMFC behaviour in a start-up phase was…