Raman visualization of micro- and nanoscale domain structures in lithium niobate

In this work we demonstrate the abilities of micro-Raman imaging in the study of ferroelectric domains and present its application to visualization of micro-scale periodical domain structures and nano-domains induced by laser irradiation in lithium niobate.     

Entrepreneurs,Banks and the Monetary Circuit: A Single Period Investigation

Economic fluctuations constitute a serious problem for policy makers and economists. Several theories have been developed to explain their causes. New recent literature has emphasized the idea that the level of income and employment is determined by decisions taken jointly by banks and entrepreneurs. Our aim here is to investigate the increasingly important relationship between banks and entrepreneurs in the monetary circuit. The system considered explicitly models the money supply process, in contrast to the current economic literature, in which money is introduced ex post as an exogenous disturbance. In view of the presence of several parameters, the two-dimensional model is quite complex. A complete analysis of all possible outcomes of the ? -limit sets is performed, and the circumstances under which the system explodes, collapses or tends to an equilibrium are discussed in terms of the model parameters.     

About the properties (V) and (R.D.P.) in injective tensor products

Rendiconti del Circolo Matematico di Palermo Series 2 - In questo lavoro vogliamo provare che seX è uno spazio di Banach del tipoL ∞ con la proprietà (V) of Pelczynski...     

Thermo-optic effects in electro-optic crystals used in an intensity-modulation system. – Application in LiTaO3

Linear electro-optic (EO) and thermo-optic (TO) effects are jointly considered on the basis of field-induced and temperature-affected perturbations of the operating point along the optical transmission curve of an EO-modulation system. In this framework, methods of EO measurements based on the frequency doubling appearing at the minimum-transmission point are formulated. Moreover, TO coefficients for various optical quantities, such as the refractive indices, n₀ and n_e, the spontaneous birefringence Δn⁽⁰⁾, the EO coefficient r, the half-wave voltage V_π, the optical phase retardation Γ, and the intensity modulation (IM) depth, m, are introduced and useful relationships between them are extracted. Also, applications of the above in the experimental field, with determinations of EO parameters and TO coefficients, are presented for the case of a congruent LiTaO₃ crystal. A comparison of the so-obtained experimental results with those derived from literature when a LiNbO₃ crystal is used demonstrates a number of advantages for the LiTaO₃-based system. PACS 78.20.Jq; 65.40.De     

Preparation and analysis of electronic-transport properties of BSCCO-2223 platelets

Il Nuovo Cimento D - High-quality single-phase thin platelets of BSCCO-2223 have been produced by a novel method on thermal-gradient-enhanced KCl flux which allows the growth of the 2223-phase in...     

Weak compactness and compactness of dominated operators onC(Ω,X)

In questo lavoro presentiamo alcuni risultati relativi alla debole compattezza e alla compattezza degli operatori dominati sugli spaziC(Ω,X).     

Labeling of Polymer Nanostructures for Medical Imaging: Importance of crosslinking extent, spacer length, and charge density

Radiolabeling studies were employed to investigate the influence of structure on the efficiency of surface functionalization for poly(acrylic acid)-coated shell crosslinked nanoparticles (SCKs) with two types of amine-terminated DOTA chelators. An intricate interplay between the chemical and physical properties of both the DOTA derivative and the SCK nanostructures was revealed, demonstrating the importance of structural control.     

Acetobacter cellulose pellicle as a temporary skin substitute

Applied Biochemistry and Biotechnology - A bacterial strain with morphological and biochemical properties close toAcetobacter xylinum has been cultured in nonagitated, inverted sucrose- and yeast...     

The viscous mucilage from the weedPortulaca oleracea,L

A polysaccharide complex has been extracted from the invasive and widespread weedPortulaca oleracea (purslane) in yields of up to 25 g% (dry wt). The clear and viscous mucilage displays physicochemical properties appropriate for industrial uses, such as food extenders and viscosifier. Toxic collateral effects can be precluded because of the already known uses in home remedies and animal feed. Anion exchange chromatography fractionated the crude complex into a neutral arabinogalactan and polydisperse pectin-like polysaccharides. This fractionation brings about a reduction in the viscosity observed for the native complex, whereas saponification ofO-acetyl and/or carboxy-methoxyl groups increases it.