Mostrando ítems 1-10 de 401
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Visual control of robots with delayed images
This research develops a control scheme for visual servoing that explicitly takes into account the delay in- troduced by image acquisition and processing. For this purpose, a predictor block, i.e., an estimator that predicts ...
Structural diversity in the self-assembly of pseudopeptidic macrocycles
The self-assembling abilities of several pseudopeptidic macrocycles have been thoroughly studied both in the solid (SEM, TEM, FTIR) and in solution (NMR, UV, CD, FTIR) states. Detailed microscopy revealed large differences ...
Multiple Spiking Species-Specific Isotope Dilution Analysis by Molecular Mass Spectrometry: Simultaneous Determination of Inorganic Mercury and Methylmercury in Fish Tissues
(American Chemical Society, 2010)
This work demonstrates, for the first time, the applicability of multiple spiking isotope dilution analysis to molecular mass spectrometry exemplified by the speciation analysis of mercury using GC(EI)MS instrumentation. ...
Performance evaluation of R404A and R507A refrigerant mixtures in an experimental double-stage vapour compression plant
As a result of the ban of the CFC fluids in 2000 and the future limitation of HCFC fluids, which manufacture limit is the year 2010, refrigerant producers have been working to develop different mixtures, mainly based on ...
Supramolecular Catalysis with Extended Aggregates and Gels: Inversion of Stereoselectivity Caused by Self-Assembly
L-Proline-L-valine dipeptide derivatives, which self-assemble in toluene, have been studied as stereoselective catalysts in the conjugate addition of cyclohexanone to trans-β-nitrostyrene. Remarkable effects on the ...
Comparison of two fMRI tasks for the evaluation of the expressive language function
Presurgical evaluation of language is important in patients who are candidates for neurosurgery since language decline is a frequent complication after an operation. Different functional magnetic resonance imaging (fMRI) ...
Structural and optical properties of CaTiO3 perovskite-based materials obtained by microwave-assisted hydrothermal synthesis: An experimental and theoretical insight
CaTiO3 powders were synthesized using both a polymeric precursor method (CTref) and a microwave-assisted hydrothermal (CTHTMW) method in order to compare the chemical and physical properties of the perovskite-based material ...
Reactions of M<sub>3</sub>Te<sub>7</sub><sup>4+</sup> (M = Mo, W) clusters with electrophilic reagents: Chalcogen exchange in the Te<sub>2</sub> ligand and the first complexes of (TeS)<sup>2-</sup>
Reactions of triangular telluride-bridged Mo and W clusters [M<sub>3</sub>(μ<sub>3</sub>-Te)(μ<sub>2</sub>-Te<sub>2</sub>)<sub>3</sub>(dtp)<sub>3</sub>]<sup>+</sup> (M = Mo, W; dtp = (EtO)<sub>2</sub>PS<sub>2</sub>) with ...
Synthesis of Cr-doped CaTiSiO5 ceramic pigments by spray drying
Cr-doped CaTiSiO5 was synthesized by spray drying and conventional ceramic method in order to assess its potential as ceramic pigment. The evolution of the phase composition with thermal treatment was investigated by X-ray ...
Photoluminescence in quasi-amorphous Pb<sub>0.8</sub>X<sub>0.2</sub>Zr<sub>0.53</sub>Ti<sub>0.47</sub>O<sub>3</sub> (X = Ca, Sr and Ba) powders: An optical and structural study
Crystalline and quasi-amorphous PZT and PZT:X (X = Ca, Sr and Ba) powders were obtained by the polymeric precursor method. Electron paramagnetic resonance (EPR) and photoluminescence (PL) data suggest that the presence of ...