Materials Literature
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Cold denaturation is a general property of globular proteins, and the process provides insight into the origins of the cooperativity of protein folding and the nature of partially folded states. Unfortunately, studies of protein cold denaturation have been hindered by the fact that the cold denatured state is normally…
We demonstrate numerically, using a three-dimensional finite-difference frequency-domain method, the ability to design a phase front using an array of metallic pillars. We show that in such structures, the local phase delay upon transmission can be tuned by local geometry. We apply this knowledge to demonstrate a meta…
Over the past decade, it has been increasingly recognized that both chemical and mechanical properties of scaffolds influence neural cell behavior, ranging from growth to differentiation to migration. However, mechanical properties are difficult to control for in the design of scaffolds for nerve regeneration, as prop…
The present study has evaluated the potential of alginate-loaded liposomes as a vehicle for the oral delivery of bioactive proteins. The vesicles were prepared from the phospholipid dipalmatoyl phosphatidylcholine using a simple dry film hydration technique. Alkaline phosphatase (ALP) was used as a model bioactive pro…
Free electrons and holes bounded by weak interactions in organic molecules must be generated from excitons to produce photocurrent in organic solar cells. Free charge carriers, in either small molecule- or polymer-based solar cells, are generated so far by dissociation of excitons at the donor-acceptor interface throu…
A new solid support membrane aerated biofilm reactor was designed for the synthesis of enantiopure (S)-styrene oxide utilizing Pseudomonas sp. strain VLB120DeltaC growing in a biofilm as biocatalyst. In analogy to traditional packed bed systems, maximizing the volumetric oxygen mass transfer capability (k(L)a) was ide…
The electrochemical properties of a series of room temperature ionic liquids (RTILs) were studied using voltammetric methods and scanning electrochemical microscopy (SECM). The RTILs consisted of 1-alkyl-3-methylimidazolium cations, [C(n)C(1)Im](+), and either bis[(trifluoromethyl)sulfonyl]imide anions, [Tf(2)N](-), o…
Treatment of the metal reagent IrCl(3)nH(2)O with two equivalents of 2-pyridyl pyrazole (N;N)H (3-tert-butyl-5-(2-pyridyl) pyrazole, (bppz)H and 3-trifluoromethyl-5-(2-pyridyl) pyrazole, (fppz)H), afforded the isomeric Ir(III) metal complexes with a general formula cis-[Ir(bppz)(2)Cl(2)]H (2 a), trans-[Ir(bppz)(2)Cl(2…
We present the first demonstration of pL-scale analyte index sensing based on surface phonon polaritons in the midinfrared, which are excited at the silicon carbide/analyte interface in the Otto configuration. Attenuated total reflectance measurements reveal analyte index specificity through a double-scan of wavelengt…
This paper describes the influence of the solvent on the morphological evolution and performance of polymer solar cells (PSCs) based on blended films of poly(thiophene−phenylene−thiophene) and [6,6]-phenyl-C 71 -butyric acid methyl ester (PC 71 BM). The blends are spin-coated with solvents exhibiting various evaporati…
Bio-electrospraying is fast becoming an attractive tool for in situ cell delivery into scaffolds for tissue engineering applications, with several cell types been successfully electrosprayed. Bone marrow derived mesenchymal progenitor/stem cells (BMSC), which are an important cell source for tissue engineering, have n…
Solid solutions of (Mg 1− x Ni x )Al 2 O 4 ( x =0–1) have been prepared using the solid‐state reaction method and their dielectric properties were measured at microwave frequencies. Formation of single‐phase spinel‐structured solid solutions was confirmed by X‐ray diffraction analysis throughout the entire composition…
Aquatic plants are widely used for phytoremediation, and effective disposal methods should be pursued for their utilization and to avoid further environmental pollution problems. This study demonstrated that, using an air-cathode microbial fuel cell (MFC) inoculated with rumen microorganisms, electricity could be dire…
A double-hydrophilic multiarm hyperbranched polymer with a hyperbranched poly(amidoamine) (HPAMAM) core and many poly(ethylene glycol) monomethyl ether (MPEG) arms connected by pH-sensitive acylhydrazone bonds (HPAMAM-g-MPEG) was successfully prepared. Benefiting from the cationic dendritic core and PEGylation shell,…
Cage the elephant: anionic tetrahedral assemblies, formed from the combination of cyclotricatechylene anions with transition metal ions, such as vanadium, contain large internal cavities that can act as hosts for alkali metal ions and solvent molecules. With appropriate metal centers, the anionic units can be linked t…
Three block copolymers, P3AT( S *)- b -P3AOT, P3AT( R *)- b -P3AOT( S *), and P3AT( S *)- b -P3AOT( S *), composed of an alkyl- and an alkoxy-substituted poly(thiophene) block, were synthesized using the living chain-growth polymerization of poly(3-alkylthiophene)s. One or both of the blocks are equipped with a chiral…
The oxidation catalyst [(L)FeIVO] (see picture; L is a tetradentate bispidine ligand) has the highest known one-electron reduction potential for a FeIVO species (0.73 V vs. SCE). Investigations into the electron-transfer kinetics show a linear correlation with the bond dissociation energy of the organic substrates.
BACKGROUND: Scoring functions, such as molecular mechanic forcefields and statistical potentials are fundamentally important tools in protein structure modeling and quality assessment. RESULTS: The performances of a number of publicly available scoring functions are compared with a statistical rigor, with an emphasis…
A finite-difference time-domain (FDTD) method is used to model thermal radiative properties of vertical arrays of multi-walled carbon nanotubes (MWCNT). Individual CNTs are treated as solid circular cylinders with an effective dielectric tensor. Consistent with experiments, the results confirm that CNT arrays are high…
Nanomaterials as catalysts for fuel cells are not only highly desirable, but necessary to reach the high reaction rates (or power densities) demanded by many applications. The exploration of catalyst materials beyond Pt metal, such as Pt containing alloys and intermetallics, immediately leads to significant synthetic…