Materials Literature
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Curing characteristics and mechanical properties of carbon black– and silica-filled natural rubber (NR)/recycled rubber powder (RRP) blends were studied. Results indicate that the minimum torque and maximum torque increase with increasing filler loading in the compounds, whereas scorch time shows a decreasing trend. C…
Gold-phosphido-monolayer-protected clusters (MPCs) of 1-2-nm diameter, Au(x)(PR2)y, analogues of the well-known thiolate materials Au(x)(SR)y, were prepared by NaBH4 reduction of a mixture of HAuCl4.3H2O and a secondary phosphine PHR2 in tetrahydrofuran/water. In comparison to the Au-thiolate MPCs, fewer of the larger…
Synchrotron x-ray diffraction and high temperature SEM examinations were used to study the crystallochemical and morphological evolution of a ZnO–NaCl system during thermal processing. Decomposition of ZnO precursor (Zn2(OH)2CO3 ∗ xH2O) at T < 400 ◦ Ci saccompanied by shrinkage and destruction of its fibre-lik ep arti…
Subtilisin E (SbtE) is a member of the ubiquitous superfamily of serine proteases called subtilases and serves as a model for understanding propeptide-mediated protein folding mechanisms. Unlike most proteins that adopt thermodynamically stable conformations, the native state of SbtE is trapped into a kinetically stab…
Physical and thermal properties of polyoxyethylene glycol glycerides (Gelucire 50/13) used as sustained-release matrix forming agent in pharmaceutical applications are studied by coupled time-resolved synchrotron X-ray diffraction and differential scanning calorimetry combined with infrared spectroscopy. With these te…
The wealth of biological information provided by structural and genomic projects opens new prospects of understanding life and evolution at the molecular level. In this work, it is shown how computational approaches can be exploited to pinpoint protein structural features that remain invariant upon long evolutionary p…
Abstract The tricarbonyl complex [(η 5 ‐C 5 H 4 ‐COOMe)Mo(CO) 3 Cl] was prepared from the reaction of sodium (methoxycarbonyl)cyclopentadienide, (C 5 H 4 ‐CO 2 Me)Na, with (Bu 4 N)[Mo(CO) 5 I]. Heating the ester with 3‐(triethoxysilyl)propylamine gave the amide derivative {[η 5 ‐C 5 H 4 ‐CONH‐C 3 H 6 Si(OEt) 3 ]Mo(CO)…
Abstract Five oxalate‐containing copper( II ) complexes of formula [Cu(dpq)(H 2 O)(ox)]·5H 2 O ( 1 ), [Cu(dpp)(H 2 O)(ox)]·H 2 O ( 2 ), [Cu(bpz)(ox)] n ( 3 ), [Cu 2 (dpp) 2 (H 2 O) 2 (NO 3 ) 2 (ox)]·4H 2 O ( 4 ) and [Cu 2 Cl 2 (bpz) 2 (H 2 O) 2 (ox)][Cu(bpz)(H 2 O) 2 (ox)]·2H 2 O ( 5 ) [dpq = 2,3‐bis(2‐pyridyl)quinoxa…
The concept of a "biostructural unit" is presented as the combination of biological and structural building blocks to create scaffolds or constructs via a bottom-up approach. Three types of biostructural units were constructed using the process of fiber formation by interfacial polyelectrolyte complexation: protein-en…
Three-dimensional morphological variations in the human face were analysed using digital models of the human face, and the usefulness of such analysis in designing industrial products was demonstrated by validating spectacle frame designs based on an original sizing system developed based on the analysis. A normalized…
This paper presents a new approach to gas sensing using a multi-walled carbon nanotube (MWCNT) subject to electrical breakdown. The electrical resistances of large-diameter MWCNTs were found to decrease in the presence of air after experiencing electrical breakdown, while pristine MWCNTs were not appreciably sensitive…
Two doubly charged polyoxoanions, Mo 6 O 19 2- and W 6 O 19 2-, were observed in the gas phase using electrospray ionization. Their electronic structures were investigated using photoelectron spectroscopy and density functional calculations with relativistic effective core potentials. Each dianion was found to be high…
We revisit the successful scaled particle theory (SPT) of hard particle fluids, originally developed by Reiss, Frisch, and Lebowitz ( J. Chem. Phys. 1959, 31, 369). In the initial formulation of SPT, five exact conditions were derived that constrained the form of the central function G . Only three of these conditions…
Electronic polymers in aqueous media offer bioelectronic detection of biomolecular processes. Here we report fluorometric detection of calcium-induced conformational changes in calmodulin based on noncovalent assembly of calmodulin to a water-soluble zwitterionic polythiophene derivative. Assembly with calmodulin will…
Absorption and photoluminescence excitation (PLE) spectra have been recorded for colloidal CdSe quantum dots of different sizes. We find no significant deviation between the PLE and the absorption spectra, provided appropriate corrections and sample treatment are made. This implies that there is no intrinsic wavelengt…
It is shown how the Debye rotational diffusion model of dielectric relaxation of polar molecules (which may be described in microscopic fashion as the diffusion limit of a discrete time random walk on the surface of the unit sphere) may be extended to yield the empirical Havriliak-Negami (HN) equation of anomalous die…
At the Advanced Light Source, three protein crystallography beamlines have been built that use as a source one of the three 6 T single-pole superconducting bending magnets (superbends) that were recently installed in the ring. The use of such single-pole superconducting bend magnets enables the development of a hard X…
We investigated nanoscale engine schematics composed of a carbon nanotube oscillator, motor, channel, nozzle, etc. For the fluidic gas driven carbon nanotube motor, the origination of the torque was the friction between the carbon nanotube surface and the fluidic gases. The density and flow rate of the working gas or…
Neural networks can be used generate potential energy hypersurfaces by fitting to a data set of energies at discrete geometries, as might be obtained from ab initio calculations. Prior work has shown that this method can generate accurate fits in complex systems of several dimensions. The present paper explores fundam…
Incompletely condensed polyhedral oligomeric silsesquioxane (POSS) with the highly reactive group of trisodium silanolate was used for the synthesis of two initiators for atom transfer radical polymerization, one with a 2-bromoisobutyl group and the other with a chlorosulfonyl group. These initiators were applied to s…