Materials Literature
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Abstract Nanocasting is a powerful method for creating materials that are more difficult to synthesize by conventional processes. We summarize recent developments in the synthesis of various structured porous solids, covering silica, carbon, and other nonsiliceous solids that are created by a nanocasting pathway. Stru…
ADVERTISEMENT RETURN TO ISSUEPREVAddition/CorrectionNEXTORIGINAL ARTICLEThis notice is a correctionRing-Opening Polymerization of Lactides Initiated by Zinc Alkoxides Derived from NNO-Tridentate Ligands. Volume 39, Number 11, May 30, 2006, pp 3745−3752.Hsuan-Ying Chen, Hui-Yi Tang, and Chu-Chieh LinCite this: Macromol…
Microchannel devices are a rapidly evolving process technology with a wide variety of applications. One of these is separation processes such as kidney dialysis, which promises to significantly improve treatment and patient lifestyle. Current membranes for dialysis are hollow fiber membranes typically using polysulfon…
Cellulose surface modification is reviewed from the standpoint of the importance of interfacial modification for the development of strong cellulose reinforcement (nanowhiskers, wood fiber, or continuous fiber) in thermoplastic matrices. While continuous fiber composites did not require interfacial modification for im…
Plant stem fibers primarily contain cellulose, hemicellulose, pectin, and lignin. These are bundles of cellulose nanofibers with a diameter ranging between 10 to 70 nm and lengths of thousands of nanometers. The mechanical performance of the cellulose nanofibers is comparable to other engineering materials such as gla…
Since the use cellulose whiskers, cellulose microfibrils, and cellulose fibres of micro- and nano-scale diameters as reinforcing agents in composites is increasing rapidly, there is a need to review the microstructure of cellulose in great detail. In this paper, the concept of "microfibres" of cellulose has been devel…
Abstract Summary: An amphiphilic graft polyphosphazene with a molar ratio of poly( N ‐isopropylacrylamide) (PNIPAm) to ethyl glycinate (GlyEt) of 0.54:1 was synthesized. This copolymer in aqueous solution exhibited two temperature induced phase transitions at 17.2 and 33.7 °C, which correspond to the transformation of…
The oxy-CO 2 methane reforming (OCRM) process has been investigated over the CoO x /CeO 2 /SA-5205 catalyst at varying reaction temperatures (750−900 °C), O 2 /CH 4 ratios (0.3−0.45), and space velocities (20 000−100 000 cm 3 /g/h). With an increasing OCRM reaction temperature, the contribution from the CO 2 methane r…
The modification of inorganic polymeric oxides at the surface of carbon nanotubes is of paramount importance for developing new sensors. In this study, molybdenum oxide (MoOx) film was electrodeposited on the surface of multi-walled carbon nanotubes (MWNTs) by cycling the potential between +0.20 and ?0.80?V (versus 3?…
Porous fiber membranes consisting of 1D assemblies of ZnO nanocrystal-supported poly(vinyl alcohol) (PVA) nanofibers are described. These hybrid nanofiber membranes were assembled by first electrospinning a ZnO precursor-containing PVA aqueous solution. Subsequently, the electrospun composite nanofibers were submerged…
Within the mode-coupling theory (MCT) for glassy dynamics, the asymptotic low-frequency expansions for the dynamical susceptibilities at critical points are compared to the expansions for the dynamic moduli; this shows that the convergence properties of the two expansions can be quite different. In some parameter regi…
The self-assembly of model peptides is studied using Brownian dynamics computer simulations. A coarse-grained, bead-spring model is designed to mimic silaffins, small peptides implicated in the biomineralization of certain silica diatom skeletons and observed to promote the formation of amorphous silica nanospheres in…
Kinases play a key role in many cellular processes by catalyzing the transfer of phosphoryl groups from ATP to a broad number of substrates, including amino acids on target proteins. The reagent 5'-fluorosulfonylbenzoyl-5'-adenosine (FSBA) has been widely used to identify ATP-binding sites in kinases since it reacts w…
Abstract For assessing the rock applicability of accelerated tests for alkali-aggregate reactivity and the effect of aggregate particle size on determining alkali reactivity of concrete aggregates in accelerated tests, experimental studies on microstructure and expansion behaviors of Potsdam sandstone and a Norwegian…
Using Monte Carlo simulations, we study the diffusion-controlled dynamics of a polymer chain, which leads to the intrachain reaction of two reactive monomers. On the basis of the bond fluctuation lattice model, we computed the mean first-passage time and examined its scaling behavior as a function of the chain length…
Measurements are reported for the sorption equilibrium and transport of water vapor into polyaniline (PANI) powders and asymmetric, microporous hollow fibers. Equilibrium isotherms at 298 K were measured on powders doped with 13 different organic and inorganic acids to change the polyaniline from its emeraldine base,…
Abstract The determination of a crystal structure consists of several steps of which refinement comes towards the end. After crystal growth, data collection, data reduction, absorption correction, and solution of the phase problem, the crystallographer has obtained atomic coordinates for some or all non-hydrogen atoms…
Chromium has been substituted for ruthenium in $\mathrm{Ca}\mathrm{Ru}{\mathrm{O}}_{3}$ up to 35%. It is found that chromium induces a ferromagnetic contribution showing a maximum fraction for $x=0.15$ in $\mathrm{Ca}{\mathrm{Ru}}_{0.85}{\mathrm{Cr}}_{0.15}{\mathrm{O}}_{3}$ with a Curie temperature $({T}_{\mathrm{C}})…
The adjustable solvent properties, vanishingly low surface tensions, and environmentally green characteristics of supercritical carbon dioxide present certain advantages in nanoparticles synthesis and processing. Unfortunately, most current techniques employed to synthesize and disperse nanoparticles in carbon dioxide…
In this chapter we present two possible ways to prepare nanosized cellulose whiskers from microcrystalline cellulose (MCC) derived from Norwegian spruce (Picea abies). The first procedure was to prepare a stable water suspension of cellulose whiskers after treatment with sulfuric acid (H 2 S0 4 ). In the second proced…