Materials Literature
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A homologous series of novel two-ring alkoxythiophene-containing liquid crystals has been synthesized using a recently developed cyclization methodology to construct the heterocyclic core. The new heterocyclic unit is expected to confer high negative dielectric anisotropy and high dielectric biaxiality when incorporat…
The theoretical permeability of multilayered nonwoven fabrics was studied using a modified Kozeny equation. The Kozeny equation is based on the concept of a hydraulic radius, i.e., a characteristic length parameter. It is limited to structures with porosities less than 0.94. The structures used in this research are in…
We examined the effects of ruscogenin glycoside (Lm-3), isolated from Liriope muscari, on lymphocyte adhesion to extracellular matrix. Adhesion of Jurkat cells activated by anti-CD3 to type I collagen was inhibited by Lm-3 in a concentration- and time-dependent manner. Lm-3 also inhibited the cell attachment to fibron…
A method of synthesis leading to poly(3-alkylthiophene)s with two different functional groups in the side chain, one of which is an NLO-active chromophore, has been developed. This method, based on the post-functionalization of a reactive homopolymeric precursor, permits to prepare different polyfunctional polymers th…
We consider the inverse Landau-Zener problem which consists in finding the energy sweep functions W ( t ) ≡ ε 1 ( t ) − ε 2 ( t ) resulting in the required time dependences of the level populations for a two-level system crossing the resonance one or more times during the sweep. We find sweep functions of particular f…
Over the last few years a great improvement in the efficiency of porous silicon-based solar cells has been achieved. A very important advantage of using porous silicon in photodiodes and solar cells is that the surface roughness of this material can be used to reduce the surface reflectance to very low values (antiref…
Collagen has been investigated as a potential natural biomaterial, because of its occurrence in the extracellular matrix. Collagen requires crosslinking in this context, by reagents that are often cytotoxic. Glutaraldehyde is one such agent that is potentially cytotoxic. The aim of this study was to determine the caus…
Transmission electron micrographs of different biological material, cryofixed, freeze-dried and embedded in Spurr's resin, in Epon, or in Lowicryl, are presented. The structure preservation obtained either without or with application of chemical fixatives after drying showed that freeze-dried embedded specimens are pa…
Dielectric Ba0.6Sr0.4TiO3 films doped with different weight percentages of TiO2 were deposited by pulsed-laser deposition. The dielectric constant, dielectric loss, and the dielectric tunability of the films were found to be a strong function of the weight ratio of TiO2/Ba0.6Sr0.4TiO3. Compared to the pure Ba0.6Sr0.4T…
An emerging topic in plant biology is whether plant cells display similar elements of programmed cell death (PCD) as animal cells do. We have studied cell death in maize roots exposed to cold stress by using fluorescence microscopy, terminal deoxynucleotidyl transferase (TdT)-mediated dUTP nick end labeling (TUNEL), D…
An analysis of the linear modulation-OSL (LM-OSL) peak and the main TL peak from irradiated Al2O3:C is presented. Data are presented indicating that the LM-OSL peak is composed of three overlapping components originating from populated traps with optical cross sections of 10(-18) - 10(-20) cm2. Studies of the main TL…
In this paper the problem of shape stability is considered, for a bubble with time-dependent radius, translating unsteadily in a flow. This situation can be brought about, for example, by forcing with an acoustic traveling wave. The equation governing translation was derived in a previous work [Reddy and Szeri (unpubl…
Photocatalytic oxidation (PCO) of volatile organic compounds (VOCs) is a highly attractive alternative technology for purification and deodorization of indoor air. The main objectives of this study were to demonstrate that a common fluorescent visible light (FVL) lamp can be used to effectively remove by PCO low conce…
ABSTRACT Clothing movement was evaluated on a video screen by a descriptive analysis sensory technique and correlated to tactile attributes and fabric mechanical properties. Six fabrics were tailored into identical wide‐leg trousers and dresses, animated by a professional model, filmed and edited for sensory evaluatio…
Radiation damage and the recrystallization of natural titanite (CaTiSiO 5 ) were studied using infrared spectroscopy in the spectral range from 50 to 7500 cm -1 . The results show that radiation damage leads to systematic changes in spectral features: decreasing absorption and reflectivity, line broadening, and loss o…
This paper presents the synthesis of 1-13C- and 4-13C-plastoquinone-9 and their characterization with NMR spectroscopy and mass spectrometry. The synthetic scheme has been further adapted to introduce 13C-labeled plastoquinones on all individual and on each combination of positions in the quinone ring. Also a two-step…
Abstract Phosphorylation of cellulose flame retarded with an ammonia‐cured, polycondensed tetrakis(hydroxymethyl) phosphonium‐urea derivative (as Proban CC, Rhodia) with a polyol diphosphoryl chloride or phosphorochloridate like spirocyclic pentaerythritol di(phosphoryl chloride) or diphosphorochloridate, SPDPC can yi…
The rheological behavior of a low‐toxicity, aqueous, Al 2 O 3 –chitosan–2,5‐dimethoxy‐2,5‐dihydrofuran (DHF) system was examined over a temperature range of 20°–98°C. At room temperature, a high‐volume‐fraction solids, shear‐thinning suspension was produced. The suspension remained in a liquidlike state for ∼24 h. By…
Here we present a comparison between protein fragments produced by limited proteolysis and those identified by computational cutting based on the building block folding model. The principles upon which the two methods are based are different. Limited proteolysis of natively folded proteins occurs at flexible sites and…
This article reviews the valence band (VB) electronic structure of carbon nitride and reports on results obtained from carbon nitride films prepared by pulsed laser deposition (PLD). In the present work, two series of carbon nitride films have been synthesized by nitrogen-ion-beam-assisted PLD and reactive PLD in nitr…