Materials Literature
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From the EtOAc and 1-BuOH fractions, three new ursane-type and four new lupane-type triterpenes, along with nine known glycosides and glycosyl esters of lupane-type were isolated from the leaves of Schefflera actinophylla. All the isolated compounds were obtained for the first time from this plant. The structures of t…
The methoxy-substituted bis-1,2,3-dithiazolyl radical 4a thermally decomposes to afford the zwitterionic bis-1,2,3-dithiazolopyridone 5a; EPR spectroscopic analysis indicates a rearrangement of the radical prior to loss of the methyl group.
Metal-organic frameworks based on metal-sulfur or metal-selenium bonds are relatively rare; herein we describe the synthesis and structural characterization of several examples, including, for example, [Cd(en)3][Cd(SC6H4S)2], which contains the anionic two-dimensional square-grid network [Cd(SC6H4S)2]n(2n-).
4‐Acyl‐1‐phenyl‐3‐methyl‐2‐pyrazolin‐5‐ones condensed with 2‐amino‐4(4′‐methylphenyl)‐thiazole to form Schiff base. These Schiff bases from complexes of type ML22H2O (M=Mn, Fe, Co, Ni and Cu). Elemental analysis, magnetic susceptibility, electrical conductance, electronic and Infrared spectral data suggested octahedra…
This research demonstrated simple but effective process to produce Al-4 mass%Cu/Al2O3 composites, by powder metallurgy method. The starting powders were aluminum, copper, and rice husk ash silica. Processing was by sintering at 650°C for 3.6 ks, hot forging of sintered billet at 600°C under 660 MPa pressure, followed…
In this study, the monodisperse abrasive deposition (MDAD) system was developed to investigate the polishing mechanism of ceria abrasives for the chemical mechanical planarization of a wafer. Using the MDAD system, groups of ceria particles with a specific size were collected from slurry with various particle size dis…
A novel two dimensional porous framework [Cd3(BTB)2(DEF)4]n·2nDEF (1) based on {Cd3} building blocks with bilayer honeycomb structure constructed from cadmium ion bridged honeycomb layers exhibits promising adsorption for N2 after activation to obtain coordinatively unsaturated Cd centers, and SEM characterization dem…
Resorcin[4]arene cavitand 1 with 1,3,2-benzodiazaborolyl walls was newly synthesized. It showed a large blue shift in the fluorescence spectra upon selective complexation with alkyltrimethylammonium salts in CH(2)Cl(2)-DMSO (9 : 1 v/v); this shift was detectable with the naked eye.
Views Icon Views Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Icon Share Twitter Facebook Reddit LinkedIn Tools Icon Tools Reprints and Permissions Cite Icon Cite Search Site Citation Koji Nakanishi, Shinya Yagi, Toshiaki Ohta; XAFS Measurements under Atmospheric Pressure in the S…
In this work, kinetics of phase separation in the blends of polystyrene (PS) and poly(vinyl methyl ether) (PVME) was investigated by a simple and sensitive method, i.e., resonance light scattering (RLS) spectroscopy. Owing to the aggregation of chromophores (phenyl rings) in the systems when phase separation occurred,…
In this communication we report initial results using high power pulsed techniques at 94 GHz to perform solid state Dynamic Nuclear Polarisation (DNP) on high volume samples. It is shown that excitation with short pulses, comparable to the pi/2 pulse length, at fast repetition rates can result in higher DNP enhancemen…
Various industry efforts are underway to improve or develop new methods to address the design of pipelines in harsh arctic or seismically active regions. Reliable characterization of tensile strain capacity of welded pipelines is a key issue in development of strain-based design methodologies. Recently, improved FEA-b…
One-dimensional chains of a specially designed lander molecule with di-carboxyl imide functional moieties, enabling complementary intermolecular hydrogen bonding, have been self-assembled under ultra high vacuum conditions on a Au(111) surface and characterized by scanning tunneling microscopy.
Aluminum matrix composites reinforced with nanometer sized Al2O3 particles were produced from powder mixtures of Al and CeO2 by the use of friction stir processing (FSP). This approach has combined hot working nature of FSP and exothermic reaction between Al and oxide. In the composites, Al2O3 particles (∼10 nm in siz…
We examine catalyst layer (CL) microstructural sensitivity to polymer electrolyte fuel cell (PEFC) performance by generalizing the agglomerate modeling and optimization framework presented by Jain et al. [ Electrochem. Solid-State Lett. , 11 , B193 (2008)] . We first investigate the shape sensitivity of agglomerates o…
Polychlorinated trityl radicals bearing carboxylate substituents are water soluble persistent radicals that can be used for dynamic nuclear polarization. In contrast to other trityl radicals, the polarization mechanism differs from the classical solid effect. DFT calculations performed to rationalize this behaviour su…
In many buildings, a continuous glass closure is employed to cover external aluminium profiles, leaving a complete glass façade. To obtain such a structural glazing, a silicone material is generally used. This research has studied silicone-glass adhesion, and the influence of atmospheric plasma treatments on this adhe…
Titanium dioxide (TiO2) nanoparticles were produced using chemical vapour deposition (CVD) at different deposition temperatures (300–700°C). All the samples were heat treated at their respective deposition temperatures and at a fixed temperature of 400°C. A scanning electron microscope (SEM), a transmission electron m…
Networks-on-Chip (NoC) have emerged as a replacement for traditional shared-bus designs for on-chip communications. As with all current VLSI design, however, reducing power consumption in NoCs is a critical challenge. One approach to reduce power is to dynamically scale the voltage and frequency of each network node o…
The Nanoscience beamline (I06) is one of seven Diamond Phase‐I beamlines which has been operational since January 2007 delivering polarised soft x‐rays, for a PhotoEmission Electron Microscope (PEEM) and branchline, in the energy range 80–2100 eV. The beamline is based on a collimated plane grating monochromator with…