Materials Literature
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Polyoxometalate (POM)-based coordination polymers, [Cu(L)2][SiW12O40]·4py·H2O (1), [Ag(py)2]4[SiW12O40] (2) and [Co(L)3]2[SiW12O40]·py·7H2O (3) (L = pyridine-2-carboxylic acid, py = pyridine), have been obtained hydrothermally and characterized by elemental analyses, IR and single-crystal X-ray diffraction analyses. E…
We develop a comprehensive theory of the nonlinear propagation of optical pulses through silica waveguides doped with highly nonlinear silicon nanocrystals. Our theory describes the dynamics of arbitrarily polarized pump and Stokes fields by a system of four generalized nonlinear Schrödinger equations for the slowly v…
In the present study, preparation of silk fibroin (SF) microspheres with controllable conformational transition by water-vapor treatment for drug delivery was investigated. The SF microspheres with and without drug encapsulation were prepared by a water-in-oil emulsion solvent diffusion method. Average sizes of drug-f…
Abstract A novel amphiphilic unimolecular nanoparticle, multi‐HPBPEA‐g‐PNIPAm, for encapsulation and release of hydrophobic guest molecules, is developed. The polymer shows core–shell architecture and is synthesized from inimer 2‐((2‐bromopropionyl)oxy)ethyl acrylate (BPEA) by atom transfer radical polymerization (ATR…
We successfully address the challenge of aligning single-walled carbon nanotubes (SWNTs) and conjugated polymer chains in composite nanofibers for enhancing their opto-electrical properties. A pore-filling template strategy has been developed to prepare such nanocomposites from SWNTs and poly(para-phenylene vinylene)…
The growth and dissolution kinetics of salicylic acid crystals are investigated in situ by focusing on individual microscale crystals. From a combination of optical microscopy and finite element method (FEM) modeling, it was possible to obtain a detailed quantitative picture of dissolution and growth dynamics for indi…
By taking the energy to be a Morse-like function of the number of electrons, E(N) = α{1 - e(-β(N-δ))}(2) - κ, the electronic chemical potential and global hardness values for a set of atoms and some molecules are calculated from the accurate definitions of these two concepts and using the hybrid B3LYP functional and 6…
Layer-by-layer (LBL) assembly is an attractive platform for controlled release of biologics given its mild fabrication process and versatility in coating substrates of any shape. Proteins can be incorporated into LBL coatings by sequentially depositing oppositely charged polyelectrolytes, which self-assemble into nano…
This work demonstrates a simple but efficient way as to how to determine the existence of shear instabilities in ideal bcc crystals under uniaxial loading. The theoretical tensile strengths are derived from calculated values of the theoretical shear strength and their dependence on the superimposed normal stress. The…
By using optimized transformation function, we research on a minimized scattering nonmagnetic concentrator, which can realize impedance matching at the inner and the outer boundaries. It has been demonstrated that the optimized transformation function method can improve the concentrating performance remarkably. The cy…
In this study, a porous oxide layer was formed on the surface of nickel-titanium alloy (NiTi) by plasma electrolytic oxidation (PEO) with the aim to produce a polymer-free drug carrier for drug eluting stent (DES) applications. The oxidation was performed galvanostatically in concentrated phosphoric acid electrolyte a…
We extend the terrace-step-kink model of crystal growth to impure solutions where the impurities act as barriers to step motion. The effects of supersaturation, step curvature, step repulsions, and impurities on step motion are treated in a unified free energy framework. The model reproduces several features seen in e…
Summary Effects of soybean oil (SO), chitosan solution (CH) and their emulsions (SO:CH = 60:40, 50:50 and 40:60 ratios) as coatings on internal quality of eggs stored at 25 and 4 °C, respectively, for 7 and 20 weeks, were evaluated. Eggs coated with SO and SO:CH emulsions maintained grade AA and/or A quality up to 7 w…
The Futaleufú River, Argentina, was monitored monthly from June 2010 to August 2011, in order to detect the invasive diatom Didymosphenia geminata, which was previously observed in Chile. Plankton and periphyton samples were taken from 10 sites. Didymosphenia geminata was not found until late winter. In August 2010, t…
Abstract Three discrete early‐lanthanide complexes with cyclic polyoxovanadate ligands, [LaV10O30]7– (1), [CeV9O27]6– (2), and [PrV9O27]6– (3), were synthesized by reaction of [VO3]– with early‐lanthanide(III) salts. Complexes 1–3 were composed of a LnIII center in square‐antiprism coordination mode with coordinated a…
The quantum confined Stark effect is investigated for the first time in bovine serum albumin (BSA) protected Au 8 and Au 25 nanoclusters. We observed a red-shift of 63 meV in Au 8 nanoclusters upon an increase in pH from 2.14 to 12.0. Such behavior could be well explained in terms of the presence of a linear polar com…
Abstract Three Schiff bases, 2‐acetylpyridine thiosemicarbazone (I1), 2‐acetylpyridine‐(4‐methylthiosemicarbazone) (I2), and 2‐acetylpyridine‐(4‐phenylthiosemicarbazone) (I3) were tested against corrosion of cast iron in aqueous solutions of HCl, NaOH, NH4Cl, and NaCl by means of a mass loss method and electrochemical…
This unique study reports a new strain (BPU1) of Candida tropicalis isolated from the rumen of the Malabari goat, showing dual production of biosurfactant and polyhydroxybutyrate. C. tropicalis strain BPU1, a facultative anaerobe, was tuned to become an aerobe in specially designed flask, the Benjamin flask. The puffy…
There is compelling evidence that, beyond their traditional role in hemostasis and thrombosis, platelets play a significant role in mediating hematologic mechanisms of tumor metastasis by directly and indirectly interacting with pro-metastatic cancer cells. With this rationale, we hypothesized that platelets can be an…
Oxygen-deficient tetragonal tungsten bronzes ceramics with general formula Ba(2)NdTi(2+x)Nb(3-x)O(15-x/2) (0 ≤ x ≤ 1) have been prepared by low temperature solvothermal synthesis with final firing of ceramics at 1100-1300 °C in air. Rietveld refinement of X-ray powder diffraction (XRD) and neutron powder diffraction (…