Materials Literature
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Piezoelectric response hysteresis curves of Pb(Zr0.2Ti0.8)O3-based capacitors have been measured by piezoresponse force microscopy. The piezoelectric coefficient d33 was found to vary considerably depending on the position of the probing tip on the top electrode for films possessing a c∕a∕c domain structure. d33 value…
BACKGROUND: We describe the database ExplorEnz, which is the primary repository for EC numbers and enzyme data that are being curated on behalf of the IUBMB. The enzyme nomenclature is incorporated into many other resources, including the ExPASy-ENZYME, BRENDA and KEGG bioinformatics databases. DESCRIPTION: The data,…
Diatoms are known to grow elaborate nano- and microstructured silica shells by depositing material from precursor-containing vesicles at mild temperature and pH. Oligo(1-methylazetane) and related moieties, in some cases attached to proteins, are believed to facilitate this process. To complement prior studies of more…
Inorganic–polymer nanocomposites are of significant interest for emerging materials due to their improved properties and unique combination of properties. A novel one-step synthesis route has been developed for making the polymer nanocomposites silica–poly(vinyl acetate) (SiO2–PVAc) in supercritical CO2 (scCO2), where…
The authors have developed novel hyaluronic acid (HA)-collagen sponge materials (HACSMs) composed of various ratios of bird feet (BF) and pig skin (PS) collagen that are fabricated employing a combination of freezing, lyophilizing, and 1-ethyl-3-(3-dimethylaminopropyl)-carbodiimide (EDC) crosslinking methods. Morpholo…
Porous plates made of nanofibrous crystalline cellulose were prepared, and used as a solid support for microbial cultures. Representative mesophilic microorganisms (, , and ) grew on the cellulose plate, just as well as they did on the conventional agar plate. optical microscopic examination revealed that the cellulos…
Tungsten oxide nanoclusters supported highly ordered mesoporous SBA-15 material has been successfully synthesized in a single step using a non-ionic surfactant as a template and used for the selective oxidation of sulfur compounds, giving excellent yields at room temperature with exceptional catalyst recyclability.
This paper describes methods for electrochemically polymerizing conducting polymer poly(3,4-dioxyethylenethiophene) (PEDOT) nanofibrils on microfabricated neural prosthetic devices from aqueous solutions containing polyacrylic acid (PAA). These fibrils have characteristic sizes ranging from 100 to 1000 nm in diameter,…
The dynamics of spreading of a water drop on a vertically aligned Si nanorod array surface is studied with a fast charge coupled device camera. Four dynamic spreading regimes are identified, with a precursor rim advancing ahead of the contact line. The diameters of the precursor rim Dp, the precursor length δ, and the…
We report on the conception, design, fabrication, experimental characterization, and theoretical analysis of nanocrystal scintillators hybridized on Si detectors and CCDs for enhanced detection and imaging in UV. Integrating luminescent CdSe/ZnS core-shell nanocrystals (NCs of 3.2 and 5.2 nm in diameter with 5% size d…
Thin films of Nd and Mn cosubstituted bismuth titanate, i.e., Bi3.15Nd0.85(Ti3−xMnx)O12 (BNTM) (x=0, 0.005, 0.01, 0.03, 0.05, and 0.1), were fabricated on Pt∕Ti∕SiO2∕Si(100) substrates at 700°C by a chemical solution deposition technique. The structures of the films were analyzed using x-ray diffraction and Raman spec…
We report on optical channel waveguiding in an organic crystalline waveguide produced by direct electron beam patterning. The refractive index profile as a function of the applied electron fluence has been determined by a reflection scan method in the nonlinear optical organic crystal 4-N, N-dimethylamino-4'-N'-methyl…
We have investigated the crystal growth, structural and physical properties of the organic nonlinear optical salt trans-4′-(dimethylamino)-N-phenyl-4-stilbazolium hexafluorophosphate (DAPSH). The chromophore in this recently created material shows a first molecular hyperpolarizability considerably larger than that of…
Sol–gel-derived KCF3SO3-doped di-urea cross-linked poly(oxyethylene) (POE)/siloxane (di-ureasil) ormolytes with ∞ > n ≥ 1 (n is the number of oxyethylene units per K+ ion) have been analysed. Samples with n > 40 are thermally stable up to 310 °C. At n ≥ 100, POE crystallites are present. At n = 5, a crystalline POE–KC…
In order to develop a suitable green phosphor for plasma display panels (PDPs), samples Ca 5 − 2 x Tb x Na x ( P O 4 ) 3 F for x = 0.20 , 0.35, 0.50, 0.65, 0.80, and 0.95 were prepared by a solid-state reaction technique at high temperature. The vacuum ultraviolet (VUV, wavelength λ < 200 nm and the energy E 50 , 000…
Macroporous styrene-divinylbenzene (St-DVB) co-polymer microspheres can be synthesized through the free-radical cross-linking co-polymerization of styrene and divinylbenzene in the presence of an inert diluent. The research developments such as in preparation methods, synthesis variables and various applications achie…
The study of conformational transitions of peptides has obtained considerable attention recently because of their importance as a molecular key event in a variety of degenerative diseases. However, the study of peptide self-assembly into beta-sheets and amyloid beta (Abeta) fibrils is strongly hampered by their diffic…
Liposome Technology, Second Edition, is an updated, expanded new edition of a classic volume in the field. It covers all aspects of liposome technology, including liposome preparation and analysis, drug entrapment, and techniques used for in vivo and in vitro evaluation of liposomes. Leading authorities have contribut…
It was observed experimentally that a chemical reaction limiting current can be affected by flow. In the present study a new more general expression than the one found in literature was derived for the superposition of the diffusion and chemical reaction controlled limiting currents . It was found that their interacti…
Electromagnetic scattering of metallic column covered by double-negative (DNG) metamaterials is simulated with auxiliary differential equation method in Finite-Difference Time-Domain method. Lossy Drude polarization and magnetization models are used to simulate DNG media. Numerical result shows that though the backwar…