Materials Literature
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Assembly of alpha-synuclein (alpha-Syn) into neurotoxic oligomers and fibrils is an important pathogenic feature of Parkinson's disease. Studying the early events of alpha-Syn aggregation, such as oligomerization and nucleation, is indispensable to understanding the complicated process. Here, photo-induced cross-linki…
Rational routes to synthetic porphyrins bearing distinct meso-substituents have typically been implemented at modest scale (<1 g quantities). The A 3 B-porphyrin 5-(4-hydroxymethylphenyl)-10,15,20-tri- p -tolylporphinatozinc(II) ( Zn-1 ) is required in multigram quantities for possible commercial use in information st…
We report on the statistical analysis of the variations in the size and position of sub-5nm tungsten-containing dots in regular arrays deposited by electron-beam-induced deposition. Full widths at half maximum of the dots are 4.2 and 2.0nm in average. It can be observed in the recorded annular dark-field images that t…
Atomistic simulation techniques are used to examine the defect chemistry of perovskite-structured NdCoO(3), a material whose electrochemical properties make it attractive for use in heterogeneous oxidation catalysis, as well as in gas sensors and mixed ionic/electronic conductors. In practice, dopants are added to NdC…
Abstract A new species of the mainly sand-dwelling marine diatom genus Attheya is described from the Sea of Japan. Of the seven species of the genus, Attheya ussurensis most closely resembles Attheya decora in its valve and girdle structure and in its plastid form and number, but it also possesses features found in on…
Sandwich-type supramolecular cation structures of (M(+))([12]crown-4)(2) complexes (M(+) = Li(+), Na(+), K(+), and Rb(+)) were introduced as countercations to the [Ni(dmit)(2)](-) anion, which bears an S = (1)/(2) spin, to form novel magnetic crystals (dmit(2-) = 2-thione-1,3-dithiole-4,5-dithiolate). The zigzag arran…
The need for new photodynamic-therapy photosensitizers has stimulated the search of new families of compounds absorbing strongly in the 700-900 nm range, the region where tissue is most transparent to radiation capable to induce the photodynamic effect. Using computational chemistry techniques, 3,6,13,16-tetraazaporph…
Short-time self-diffusivities, D(S)S, are computed for attractive colloidal fluids with van der Waals potentials to identify their percolation threshold and a previously unexplained dynamic transition. Our results show a discontinuous change in the slope of D(S)S vs temperature as the percolation threshold is crossed.…
Abstract The search for practical applications of electrospun microfibers and nanofibers is primarily concentrated on filters, membranes, and biomedical devices. This chapter reviews current progress towards developing new applications of electrospinning. The production of submicron as well as nanometer sized fibers b…
Langmuir layers of a symmetric bent-core molecule with hydrocarbon end chains and two chlorine atoms substituted on the central phenyl ring of the bent core were characterized by a combination of surface pressure isotherms, Brewster angle microscopy, and surface potential measurements. These layers were found to be op…
L-Arginine kinase (AK; ATP:L-arginine N-phosphotransferase; EC 2.7.3.3) catalyzes the reversible transphosphorylation between N-phospho-L-arginine (PArg) and ATP thus buffering cellular ATP levels. AK was purified from the leg muscle of the locust Migratoria manilensis by Sephacryl S-200 HR gel filtration chromatograp…
This work reports on the structural and spectroscopic properties of ethane-bridged Zn porphyrin dimers (1) in Langmuir-Schäfer (LS) thin films by combining scanning force microscopy (SFM) with film balance, UV-vis absorption, fluorescence, and nanosecond laser flash photolysis measurements. Results show that depending…
Since the inception of the field of tissue engineering, there has been a considerable effort to develop an "Ideal" tissue engineering scaffold. To date, investigators have developed materials such as collagen, poly(glycolic acid) (PGA), poly(lactic acid) (PLA), and polycaprolactone (PCL) for use in matrix construction…
Abstract Poly(propylene)/clay nanocomposites were prepared by a “one step” method, using pristine montmorillonite (MMT) with surfactant loading at different ratios. The nanocomposite structure was examined using X‐ray diffraction (XRD), transmission electron microscopy (TEM) and high resolution electron microscopy (HR…
The [Os(III)(CN)6]3- anion is prepared by chemical oxidation in aqueous solution and isolated as yellow prisms of [Ph4P]3[Os(III)(CN)6].6H2O (1). This species crystallizes in the triclinic space group P with cell parameters a = 13.7609(11) A, b = 16.2275(13) A, c = 17.0895(14) A, alpha = 91.4040(10) degrees , beta = 1…
[structure: see text] 2-C-Acetoxymethyl glycal derivatives reacted with beta-naphthol in the presence of InCl(3) (30 mol %) to give chiral pyrano[2,3-b]naphtho[1,2-e]pyrans in good to excellent yields via stereoselective Ferrier rearrangement-tandem cyclization. The major glucose-derived product exhibited crystal pack…
Dehydrogenases and reductases are enzymes of fundamental metabolic importance that often adopt a specific structure known as the Rossmann fold. This fold, consisting of a six-stranded beta-sheet surrounded by alpha-helices, is responsible for coenzyme binding. We have developed a method to identify Rossmann folds and…
Classical molecular dynamics simulations of atomistic models of combustion-generated carbon nanoparticles and lipid bilayers have been performed to explore their possible structural, dynamical, and thermodynamic effects on biological membranes. The DREIDING generic force field is used for the carbonaceous nanoparticle…
Composites of shape memory alloys (SMA) with a matrix have been widely studied to suppress propagating damage of the matrix, where the embedded SMA is used as an actuator. We use the embedded SMA wire in composites both as an actuator and as a strain sensor. The possibilities of using the SMA wire as a strain sensor t…
Abstract Cast film composites have been prepared from aqueous polymer solutions containing nanometric silica particles. The polymers were polyvinyl alcohol (PVA), hydroxypropylmethylcellulose (HPMC) and a blend of PVA‐HPMC polymers. In the aqueous dispersions, the polymer–silica interactions were studied through adsor…