Materials Literature
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Molten dicationic imidazolium chloride or bromide salts, with short alkyl linker chains, have been found to be stable, re-usable media for the controlled pyrolysis of cellulose without acid pre-treatment to give anhydrosugars, primarily levoglucosenone, at a substantially lower temperature (180 °C) than most previousl…
The aim of this study was to investigate the antimicrobial effect of chitooligosaccharides prepared by chitosanase from Pseudomonas CUY8. Antimicrobial activities of different degrees of deacetylation (DD) and polymerization (DP) of chitooligosaccharides against various species of bacteria and fungi were measured. The…
Synthetic, bio-inspired organic–inorganic composites are emerging as new materials for bone regeneration, offering more possibilities to tune biocompatibility, biodegradability and mechanical properties. Also thin films of calcium carbonate have been shown to have potential as models for bone replacement biomaterials.…
Metalloproteomics is an emerging scientific field. It is focused to investigate the distributions and compositions of all metalloproteins in a proteome, their structural and functional characterization and their structural metal-binding moieties. Various nuclear analytical techniques, such as neutron activation analys…
P-type photochromic diarylethenes having a diethylamino group can switch to T-type photochromic system by the addition of trifluoromethanesulfonic acid as external stimuli.
The set of nanoelectromechanical systems (NEMS) based on relative motion of carbon nanotubes walls is proposed for use in medical nanorobots. This set includes electromechanical nanothermometer, jet nanoengine, nanosyringe (the last can be used simultaneously as nanoprobe for individual biological molecules and drug n…
MoO42- condenses on increasing acidity in aqueous solution and the extent of condensation depends on the level of pH. Frequency response analysis in the range 1000 Hz to 35 mHz and cyclic voltammetry were used to characterize the admittance, impedance, double layer capacitance, and semiconduction behavior of different…
The effect of Cu microstructure on electromigration (EM) has been investigated. A variation in the Cu grain size distributions between wafers was achieved by adjusting the wafer annealing process step after Cu electroplating and before Cu chemical mechanical polishing. Void growth morphology was observed by in-situ an…
This paper is aimed at clarifying the statistics of single molecule (SM) surface enhanced Raman scattering (SERS) signals. The argument of the possible existence of a Poisson distribution in the statistics of intensities in SM-SERS has been used many times in the last decade as a proof of single molecule detection. We…
The effect of magnetic fields on localized corrosion was explored for one-dimensional artificial pits that are used to simulate pitting corrosion, and for two-dimensional pits in thin metal films.It was found that the pitting dissolution of ferromagnetic electrodes was significantly affected by the presence of a magne…
Dynamics features of high repetition rate continuously pumped solid-state regenerative amplifiers were studied numerically. A space independent rate equations and discrete-time dynamical system approach were used for system state evolution analysis. Regular single-energy operation, quasi-periodic pulsing and chaotic b…
Upon changing the oxidation state, a reversible open-close motion of chiral molecular scissors, composed of a redox-active ferrocene pivot and an isomerizable azobenzene strap, can be realized only by UV light.
We analyze the observed structural distinctions between calcium carbonate crystals of biogenic and non-biogenic origin in terms of interaction between organic macromolecules and growing mineral. We conclude that rather strong forces are imposed by organic macromolecules on mineral crystallites, which cause lattice str…
Because α-glycine grows 500 times faster than γ-glycine, the small thermodynamic preference for γ-glycine is difficult to predict, detect and exploit.
The endothelium bares a paramount therapeutic and diagnostic significance in vascular disease. The current work presents a novel strategy based on the use of superparamagnetic nanoparticles to obtain an endothelial cell lining on the luminal surface of vascular conduits, which can be detected non-invasively in a clini…
This study clarifies the mechanism of the hollow structure formation in the simple self-templating preparation of monodispersed hollow silica structures; the role of the polarity of washing solvent in creating the hollow structure is emphasized.
Folate appended sterically-stabilized liposomes (FA-SL) were investigated for tumor targeting. Liposomes were prepared using HSPC, cholesterol and FA-polyethylene glycol (PEG)-SA. The liposomes with polyethylene glycol (PEG) without folic acid which has similar lipid composition were used for comparison. Liposomal pre…
Highly stable Eu(III) and Tb(III) complexes, emitting in the red and green visible regions, respectively, have been anchored onto a single SiO(2) transparent layer, yielding ca. 40 nm thick films; this allows high loading of tailored proportions of the red and green emitters within the films and results in highly unif…
In this study, Ga-doped (GZO) films deposited on a sapphire utilizing magnetron cosputtering method using and targets were demonstrated. The results revealed that the resistivities of the GZO films reduced by at least two orders of magnitude after the thermal annealing. The reduction in resistivity could be attributed…
Diatoms are unicellular photoautotrophic eukaryotes that play an important role in ecology by fixing large amounts of CO2 in the oceans. Because they evolved by secondary endocytobiosis-- a process of uptake of a eukaryotic alga into another eukaryotic cell--they have a rather unusual cell biology and genetic constitu…