Search results for "solid"

In situ generation of Co(II) by use of a solid-phase reactor in an FIA assembly for the spectrophotometric determination of penicillamine

2005

[EN] A flow injection analysis (FIA) manifold for the determination of penicillamine in pharmaceutical preparations is proposed. The manifold includes a solid-phase reactor for the in situ production of the derivatizing reagent, Co(II) ion, which forms a coloured complex with penicillamine in an alkaline medium. The reactor is prepared by natural immobilization of cobalt carbonate on a polymer matrix, which endows it with a high mechanical and microbiological stability. The cobalt released by passage of a 5 x 10(-4) Mol l(-1) sulphuric acid stream at a flow-rate of 2.3 ml min(-1) is merged with a volume of 314 mu l of sample containing penicillamine in ammonium-ammonia buffer at pH 9.5 to m…

Cloud point–dispersive μ-solid phase extraction of hydrophobic organic compounds onto highly hydrophobic core–shell Fe 2 O 3 @C magnetic nanoparticles

2012

Abstract A novel two-step extraction technique combining cloud point extraction (CPE) with dispersive micro-solid phase extraction (D-μ-SPE) is presented in this work for the first time. The method involves initial extraction of the target analytes by CPE in the micelles of a non-ionic surfactant medium; then highly hydrophobic polysiloxane-coated core–shell Fe 2 O 3 @C magnetic nanoparticles (MNPs) are used to retrieve the micellar phase. In that manner, the micellar phase containing the analytes is the target of the D-μ-SPE step rather than the analytes directly. MNPs are then collected by the application of an adscititious magnetic field overcoming the need for specific steps associated …

Comparison of Metrics for the Classification of Soils Under Variable Geometrical Conditions Using Hyperspectral Data

2008

International audience; The objective of this letter is to find a distance metric between reflectance spectra that is not sensitive to the variations on the soil reflectance induced by the geometry of solar-view angles. This is motivated by the fact that differences between spectra measured for the same soil under different observation and illumination configurations can lead to misclassifications. Using 26 soils of different compositions simulated with Hapke’s model and 92 soils of different compositions measured under 28 solarview angle geometries in laboratory conditions, we tested three metrics, namely, root-mean-square error, spectral angle mapper, and R2 (the coefficient of determinat…

Pheromone-induced olfactory memory in newborn rabbits: Involvement of consolidation and reconsolidation processes.

2009

Mammary pheromone (MP)-induced odor memory is a new model of appetitive memory functioning early in a mammal, the newborn rabbit. Some properties of this associative memory are analyzed by the use of anisomycin as an amnesic agent. Long-term memory (LTM) was impaired by anisomycin delivered immediately, but not 4 h after either acquisition or reactivation. Thus, the results suggest that this form of neonatal memory requires both consolidation and reconsolidation. By extending these notions to appetitive memory, the results reveal that consolidation and reconsolidation processes are characteristics of associative memories of positive events not only in the adult, but also in the newborn.

Mirror neurons : physiological requirement for emotional empathy and social and moral behaviour of human and nonhuman primates

2018

Fil: Claramonte Sanz, Vicente. Universitat de València. Departament de Filosofia. Área de Lògica i Filosofia de la Ciència; España. Claramonte Sanz, V. (2018). Las neuronas espejo: presupuesto fisiológico de la empatía emocional y de las conductas sociales y morales en primates humanos y no humanos. Metatheoria, 8(2), 15-22. A partir de la evidencia científica y los análisis debidos a los estudios de investigadores como Rizzolatti, Sinigaglia, Galle-se, Goldman, Iacoboni, etc., este artículo argumenta que el vínculo entre neuronas espejo y empatía emocional resulta corroborado por los estudios de Neurociencia sobre la actividad perceptiva y las reacciones emocionales. En particular, con las…

Communication, Cohesion, and Corona: The Impact of People’s Use of Different Information Sources on their Sense of Societal Cohesion in Times of Cris…

2021

Solidarity among society is considered crucial to tackle the corona pandemic. With the crisis evoking a high need for orientation, the information people obtain from different sources may shape whe...

Sur "Israél-Palestine, Le Cancer", un devoir civique d'intelligence de la complexité

2004

Se trata de un dossier coordinado por J. L. Le Moigne sobre la polémica y acciones en torno al texto "Isráel-Palestine, le Cancer", escrito por Morin, Nair y Sallenave en 2002. José Vidal-Beneyto fue uno de los firmantes del llamamiento en apoyo a Edgar Morin del 30 de marzo de 2004. La información completa respecto a este asunto se encuentra en el documento facilitado y en la web http://archive.mcxapc.org/docs/conscienceinextenso/0805cancer.pdf

Progress in the standardisation of particle and surface characterisation

2002

In 1999, we published a comprehensive survey of standards and certified reference materials for dispersed and porous solids. The present paper summarises and reports on new standards and proposals.

Quel contexte scolaire pour favoriser le développement d’attitudes solidaires chez les élèves français de collège et de lycée ?

2022

Three-dimensional interpretation of the color system of Aguilonius/Rubens 1613

2000

The two-dimensional color system in the textbook on optics, written by F. Aguilonius (1613) and illustrated by PP Rubens,1 is equivalent to a three-dimensional color solid, which can also be constructed by applying the trichromatic theory of color vision on a color circle. © 2000 John Wiley & Sons, Inc. Col Res Appl, 26, S17–S19, 2001