Materials Literature
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The d-mannonate dehydratase (ManD) function was assigned to a group of orthologous proteins in the mechanistically diverse enolase superfamily by screening a library of acid sugars. Structures of the wild type ManD from Novosphingobium aromaticivorans were determined at pH 7.5 in the presence of Mg2+ and also in the p…
Aromatic aldehydes, including azulenecarbaldehydes, have been shown to react with an indene enamine derivative in the presence of dibutylboron triflate to give stable fulvene aldehydes. 1,3-Azulenedicarbaldehyde afforded a fulvene dialdehyde under these conditions, and this reacted with a dipyrrylmethane to give a 22-…
Single-crystal Sb 2 S 3 nanowires were synthesized at a large scale by a facile organic molecule-assisted hydrothermal method. Such nanowires prefer to grow along the [001] direction. The as-prepared individual Sb 2 S 3 nanowire exhibits nonlinear current−voltage ( I − V ) characteristics, indicating its potential app…
CdTe quantum dots (QDs) were synthesized in aqueous solution using thioglycolic acid (HS-CH2COOH, TGA) as a stabilizer. The phenomenon of "on" and "off" luminescence intermittency (blinking) of CdTe QDs in PVA and trehalose was investigated by single-molecule optical microscopy, and we identified that the intermittenc…
Molecular dynamics simulations have been used to investigate the mobility and morphology of platinum nanoparticles supported on carbonaceous materials. The embedded-atom method was used to model Pt−Pt interactions. The Pt−C interactions were modeled using the Lennard−Jones potential. Carbon atoms were treated as rigid…
Surface-enhanced Raman scattering (SERS) of the 4-mercaptopyridine (4-MPy) molecules adsorbed on the electrochemically roughened silver electrodes were investigated under practical electrochemical conditions. The adsorbed 4-MPy molecules are converted from a perpendicular orientation to a parallel orientation as the e…
Several theoretical models have been formulated to explain the growth of porous structures in anodized alumina. Using some basic assumptions, these models predict the size and shape of the pores in the anodic porous alumina as functions of pH and voltage. Additionally, they address issues of stability in the pore grow…
Lactococcus lactis FI9078, a construct carrying a disruption of the ldh gene, converted approximately 90% of glucose into lactic acid, like the parental strain MG1363. This unexpected lactate dehydrogenase activity was purified, and ldhB was identified as the gene encoding this protein. The activation of ldhB was expl…
A high molecular weight aliphatic polythioester was prepared by lipase-catalyzed polymerization of hexane-1,6-dithiol and dimethyl sebacate using the technique of ring-opening polymerization of a cyclic thioester. The cyclic thioester monomer was first prepared using lipase from Candida antarctica in dilute solution.…
Hausmannite (Mn 3 O 4 ) nanoparticles have been prepared by mixing aqueous solutions of manganese nitrate and hexamethylenetetramine from 20 to 80 °C. Activation energy for the particle formation increases from 0.5 to 0.8 kJ/mol with nitrate concentration. Nanoparticles (18−41 nm) with a faceted structure are prepared…
We propose a structure model of a poly(vinyl alcohol) (PVA) film during uniaxial stretching in water. In addition to the relaxation of microfibrils and the extension of interfibrillar amorphous regions shown in our previous paper, it was described that the strain-induced crystallization takes place in the interfibrill…
In CaCO3, biomineralization nucleation and growth of the crystals are related to the presence of carboxylate-rich proteins within a macromolecular matrix, often with organized beta-sheet domains. To understand the interplay between the organic template and the mineral crystal it is important to explicitly address the…
We describe the synthesis of a visible light absorbing boron−fluoride co-doped TiO 2 photocatalyst by a sol−gel methodology and its structural characterization using magnetic resonance techniques. The formation of photoactive sites was induced by pyrolysis under anaerobic conditions at temperatures of 400 to 500 °C, f…
This contribution describes a simple and facile method for the functionalization of thiol-coated gold nanoparticles using microwave-assisted 1,3 dipolar cycloadditions. The developed procedure allows for the attachment of terminal alkynes onto azide-containing gold nanoparticles in nearly quantitative conversions with…
One area that has been overlooked in the evolution of magnetic nanoparticle technology is the possibility of introducing informational atoms into the iron oxide core of the coated colloid. Introduction of suitable atoms into the iron oxide core offers an opportunity to produce a quantifiable probe, thereby adding one…
The shielding properties of two different lead-free materials-tin and a compound of 80% tin and 20% bismuth-for protective clothing are compared with those of lead for three typical x-ray spectra generated at tube voltages of 60, 75, and 120 kV. Three different quantities were used to compare the shielding capability…
Meshes of electrospun (ES) polycaprolactone (PCL) and polyethylene terephthalate nanofiber meshes were structured by ablation of linear grooves with a scanned femtosecond laser. Focus spot size, pulse energy, and scanning speed were varied to determine their affects on groove size and the characteristics of the electr…
Self-organized micelles of new renewable resource amphiphilic azobenzenesulfonic acid anionic surfactant were utilized to prepare water-soluble, luminescent, and highly ordered polypyrrole nanomaterials. The micellar behavior of the reaction medium was precisely controlled by varying the composition of pyrrole/surfact…
Part 1 Nanofiber production: Electrospinning of nanofibers Producing nanofibre structures by electrospinning for tissue engineering Continuous yarns from electrospun nanofibers Producing polyamide nanofibers by electrospinning Controlling the morphologies of electrospun nanofibers. Part 2 Carbon nanotubes and nanocomp…
We employ the formalism of bond currents, expressed in terms of the nonequilibrium Green functions, to image the charge flow between two sites of the honeycomb lattice of graphene ribbons of few nanometers width. In sharp contrast to nonrelativistic electrons, current density profiles of quantum transport at energies…