Materials Literature
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In the present study, photoresponsive surface molecularly imprinted poly(ether sulfone) microfibers are prepared via nitration reaction, the wet-spinning technique, surface nitro reduction reaction, and surface diazotation reaction for the selectively photoregulated uptake and release of 4-hydrobenzoic acid. The prepa…
Successfully tunneled: The rapid and temperature-independent intramolecular proton transfer in thiotropolone occurs entirely through quantum mechanical tunneling (see picture). For tropolone, tunneling across a smaller yet broader barrier leads to a slower rate of proton transfer for temperatures smaller than 240 K.
Optical excitations in semiconductors have been extensively studied in the dipole limit, neglecting the spatial variation of the exciting field. This is a very good approximation in most cases. However, when approaching the regime of nano optics and plasmonics, optical fields of extreme spatial confinement is found, e…
Abstract The orientation of the organofibrous structure plays an important role not only in the biomineralization process but also in the extracellular matrix (ECM) of articular cartilage by providing cells with biomechanical cues. Here, it is reported that a long range nanofibrous orientation can be realized by a sel…
A mode-selective grating reflector based on a hybrid plasmonic waveguide, together with a two-to-one coupling structure, is proposed and analyzed. The grating structure is designed to reflect only the fundamental even mode existing in the hybrid plasmonic waveguide, and to pass through the fundamental odd mode at a 15…
Polarization of glasses containing two types of differing in mobility positive ions is modeled both for blocking and non-blocking anode conditions. Formation of slower ions concentration peak is demonstrated. Comparison of the model with known experimental results shows a good coincidence. The model is applicable to g…
The villin headpiece subdomain (HP35) has become one of the most widely used model systems in protein folding studies, due to its small size and ultrafast folding kinetics. Here, we use HP35 as a test bed to show that the fluorescence decay kinetics of an unnatural amino acid, p-cyanophenylalanine (Phe(CN)), which are…
This Letter describes the synthesis and photophysical characterization of a Ru(II) assembly consisting of metal polypyridyl complexes linked together by a polyfluorene scaffold. Unlike many scaffolds incorporating saturated linkages, the conjugated polymer in this system acts as a functional light-harvesting component…
We report on differential cross section (DCS) measurements for the electron-impact excitation of the electronic states of pyrimidine. The energy range of the present measurements was 15-50 eV with the angular range of the measurements being 10°-90°. All measured DCSs displayed forward-peaked angular distributions, con…
Ni–SiC nanocomposite coatings have been prepared by electrodeposition with the application of ultrasound at an ultrasonic frequency of 38 kHz with 200 W ultrasonic power. The observed cavitation effect due to ultrasonic application on surface morphologies, microstructures, mechanical, tribological and corrosion proper…
This work addresses the problem of similarity search and classification of chemical reactions using Neighborhood Behavior (NB) and Condensed Graphs of Reaction (CGR) approaches. The CGR formalism represents chemical reactions as a classical molecular graph with dynamic bonds, enabling descriptor calculations on this g…
The structures of small gas-phase Pt(n)O(2m)(+) (n = 1-6, m = 1, 2) cluster cations have been investigated in a combined infrared multiple photon dissociation (IRMPD) spectroscopy and density functional theory (DFT) study. On the basis of the infrared spectra obtained, it is concluded that in most clusters oxygen is b…
Water forms the basis of lubrication in the human body, but is unable to provide sufficient lubrication without additives. The importance of biolubrication becomes evident upon aging and disease, particularly under conditions that affect secretion or composition of body fluids. Insufficient biolubrication, may impede…
Titanium dioxide‐graphene (TiO2‐G) composite was used for the photodegradation of alkylphenols in wastewater samples. The TiO2‐G composites were prepared via sonochemical and calcination methods. The synthesized composite was characterized by X‐ray diffraction (XRD), infrared spectroscopy (IR), scanning electron micro…
Different synthetic biomaterials such as polylactide (PLA), polycaprolactone and poly-l-lactide-co-ε-caprolactone (PLCL) have been studied for urothelial tissue engineering, with favourable results. The aim of this research was to further optimize the growth surface for human urothelial cells (hUCs) by comparing diffe…
Enzymes are an important class of biological molecules whose specific functionalities can be exploited to perform tasks beyond the reach of conventional chemistry. Because they are operational under environmentally friendly, ambient conditions, the adaptation of these biomacromolecules can potentially be used to repla…
The analysis of 36 available crystal structures of WD40 repeat proteins reveals widespread existence of a beta-bulge formed at the beginning of strand a and the end of strand b, termed as WD(b-a) bulge: among a total of 259 WD40 blades, there are 243 such β-bulges. The R(1) positions in these WD(b-a) bulges have fair…
Efficient and selective: Two lipophilic catalysts were used for Baeyer-Villiger (BV) oxidations to give lactones in high yields. Cascade reactions involving this BV oxidation were used to selectively obtain either unsaturated carboxylic acids or hydroxylactones in high yields from β-silyl cyclohexanones.
In this work, we augment the approximate density functional method SCC-DFTB (DFTB3) with the chemical-potential equalization (CPE) approach in order to improve the performance for molecular electronic polarizabilities. The CPE method, originally implemented for the NDDO type of methods by Giese and York, has been show…
Tissue-engineering techniques have brought a great hope for bladder repair and reconstruction. The crucial requirements of a tissue-engineered bladder are bladder smooth muscle regeneration and vascularization. In this study, partial rabbit bladder (4×5 cm) was removed and replaced with a porcine bladder acellular mat…