Materials Literature
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Abstract The influence of the plasticizer content and film preparation procedure on the morphology, density, thermal and mechanical properties of cellulose acetate (CA) films plasticized with poly‐(caprolactone triol) (PCL‐T), were studied. Differential scanning calorimetry (DSC), thermal mechanical analysis (TMA), sc…
The solution structure of hyperbranched macromolecules was investigated by means of small-angle neutron scattering (SANS). Hyperbranched polyglycerols of different molecular weight were investigated in D 2 O and CD 3 OD, and very similar molar masses and radii of gyration were obtained in both solvents. Kratky plots o…
Gamma-induced modifications in polycarbonate polymer have been studied in the dose range of 101–106 Gy. Thin films of polycarbonate have been irradiated with different gamma doses from a Co60 source. To monitor the modifications caused by gamma radiation, FT-IR, differential scanning calorimetry and X-ray diffraction…
A recent study has shown that in marine conditions micro-pitting in mild steel is present very early after first immersion and that macro-pitting usually does not become significant until anaerobic conditions set in. The overall pitting behavior with time was represented by a multiphase phenomenological model. This wa…
Direct optimization (DO) of 126 nuclear-encoded SSU rRNA diatom sequences was conducted. The optimal phylogeny indicated several unique relationships with respect to those recovered from a maximum likelihood (ML) analysis of an alignment based on maximizing primary and secondary structural similarity between 126 nucle…
Abstract Time‐of‐flight secondary ion mass spectrometry (TOF‐SIMS) was used for an in situ thermal decomposition study of Zn(CH 3 COO) 2 ·2H 2 O forming ZnO nanoparticles. TOF‐SIMS spectra were recorded at regular temperature intervals of 25 °C in positive and negative detection modes in a dynamic thermal process. Con…
Abstract Zircon- and reidite-type ZrSiO 4 produced by shock recovery experiments at different pressures have been studied using infrared (IR) and Raman spectroscopy. The v 3 vibration of the SiO 4 group in shocked natural zircon shows a spectral change similar to that seen in radiation-damaged zircon: a decrease in fr…
This paper describes a strong piezoelectric carrier confinement at a ZnO/Zn 0.6 Mg 0.4 O heterointerface grown on an a -plane sapphire substrate by molecular beam epitaxy. A ZnO/Zn 0.6 Mg 0.4 O double-heterojunction structure was grown without intentional doping and the formation of a deep potential well for electrons…
Semiconductor quantum dots (QDs) offer several advantages over organic dyes in fluorescence-imaging applications, such as higher quantum yield, exceptional photostability, and a narrow, tunable, and symmetric emission spectrum. To explore whether QDs could specifically and effectively label tumor markers and be used i…
X-ray scattering and rheology are employed to study the volume fraction dependence of the collective structure and elastic moduli of concentrated nanoparticle-polymer depletion gels. The nonequilibrium gel structure consists of locally densified nonfractal clusters and narrow random interfaces. The elastic moduli disp…
Abstract Despite the current broad interest in such materials, the synthesis of defined structures in the size range of 10 nm to ca. 1 μm (“mesoscopic”) is challenging. Few routes shape‐selectively afford geometrically regular structures, other than the typical spherical metal particles of 1 to 10 nm. Moreover, these…
PURPOSE: The purpose is to demonstrate whether an appropriately designed liposomal formulation of irinotecan is effective in treating mice with liver-localized colorectal carcinomas. EXPERIMENTAL DESIGN: Irinotecan was encapsulated in 1,2-distearoyl-sn-glycero-3-phosphocholine/cholesterol (55:45 molar ratio) liposomes…
This paper presents an improvement of the procedure to determine the parameters of the simplified model for metal-oxide surge arresters, derived from the IEEE standard model. The main innovation introduced by the paper lays in the possibility to define an approximate dynamic model even if data about residual voltages…
Abstract Four new thioantimonate(III) compounds with the general formula [ TM (tren)]Sb 4 S 7 , TM = Mn 1 , Fe 2 , Co 3 and Zn 4 , were synthesized under solvothermal conditions by reacting elemental TM , Sb and S in an aqueous solution of tren ( tren = tris(2‐aminoethyl)amine). All compounds crystallize in the monocl…
A number of alloys, including stainless steels, aluminum, and nickel-based alloys, are used in seawater for various applications. The localized corrosion of these materials is affected, among other factors, by temperature, microbial activity, chlorination, and flow rate. A predictive model, based on the calculation of…
We have investigated the adsorption and lubrication properties of a series of poly(ethylene oxide)−poly(propylene oxide)−poly(ethylene oxide) (PEO−PPO−PEO) block copolymers (“Pluronic”) to examine the feasibility of using them as aqueous lubricant additives. The adsorption behavior of PEO−PPO−PEO onto poly(dimethylsil…
Fibers/fabrics coated with conductive polymers exhibit sensing capacities for external stimuli like strain, temperature, relative humidity, etc. In this paper, we present our recent investigation of the sensing behavior and mechanical analysis of polymer fibers coated with an intrinsically conductive polymer, i.e., po…
Abstract An error analysis for numerically evaluating random uncertainties in x‐ray photoelectron spectroscopy has been implemented in version 2003 of the spectra treatment and analysis software UNIFIT in order to improve the understanding of the statistical basis and the reliability of the model parameters for photoe…
This paper clarifies the operating principles of a controllable reactor of transformer type (CRT). In nature, a CRT is equivalent to a multi-winding transformer for which the low-voltage windings (control windings) operate at short-circuited states in turn. This kind of reactor possesses such advantages as smooth powe…
Abstract Low‐dielectric‐constant (low‐κ) materials are a critical requirement for future generations of computer microprocessors. As a unique class of porous silicas, pure silica zeolites (PSZs) have been shown to be a promising low‐κ material with excellent mechanical strength (e.g., elastic modulus of 16–18 GPa) due…