Search results for "banc"

Caos y gobernación del mundo

2004

Determination of vinegar acidity by attenuated total reflectance infrared measurements through the use of second-order absorbance-pH matrices and par…

2007

Univariate (zero-order), multivariate (first-order) and multiway (second-order) calibrations were assayed for the determination of vinegar acidity using a mechanized procedure based upon vibrational spectroscopy and the emerging multicommutation methodology. The second-order methodology relies on the use of a flow system based on multicommutation and binary sampling. The flow network comprises a set of three-way solenoid valves, computer-controlled to provide facilities to handle the sample and to generate a time-dependent pH gradient using two carrier solutions. The procedure is based on the volumetric fraction variation approach that maintains the same volume of sample solution and dynami…

Les biens publics de la Méditerrannée

2007

Converencia de José Vidal-Beneyto en la "IX Asamblea de la Comunidad de las Universidades del Mediterráneo (CUM)" y con motivo también de la entrega del Premio del Mediterráneo 2003 al propio autor. Bari, Italia, 20-22 de noviembre de 2003. El texto no fue publicado hasta el año 2007.

Mercosur entre mundialización y nacionalismos

2000

Versión corta e inédita del artículo "Mercosur y la otra mundialización" (en: El País, 5 de octubre de 2000) destinada a la Embajada de España en Paraguay.

Mercosur y la otra mundialización

2000

La versión publicada de este artículo aparece también en Cassen, Bernard, et al. (2002). Attac : contra la dictadura de los mercados : alternativas a la mundialización neoliberal (pp. 111-116). Barcelona: Icaria.

Early post-fire bird community in European boreal forest: Comparing salvage-logged with non-intervention areas

2019

Salvage logging after disturbances in forests substantially modifies vegetation structureand dead wood availability, but empirical evidence on its impact on biodiversity, especiallyin European boreal forest, is sparse. In this study we investigated the short-term effect ofpost-fire salvage logging on species richness and abundance of birds in recently burnedmixed coniferous forest. Using point counts we estimated local species composition at 49salvaged sites and 55 non-intervention sites (burnt forest left for natural regeneration) thatwere not logged after afire in south-central Sweden. Local species richness, abundanceand Simpson's species diversity index were significantly higher at non-…

Sbarchi

2021

During 2020, the Mediterranean Sea was again the testing ground for migration flows from North Africa and the Middle East to Italy, Greece and Spain. 2020 was also a complex year due to the spread of the COVID-19 pandemic. Movements between countries were affected by the spread of the virus that spared no one and imposed the need to reflect on 'global health' and the consequences that this has, also in the relationship between countries and in travel.

Flow injection Fourier transform infrared determination of nicotine in tobacco

2000

A fully automated procedure is proposed for the Fourier transform infrared (FTIR) determination of nicotine in tobacco. The method is based on the on-line extraction of nicotine with CHCl3. Samples, weighed inside empty extraction cartridges, were humidified with NH3 and the cartridges were installed in a flow manifold in which they were extracted with 2 ml CHCl3 for 2 min, then 400 microliters of the extract were introduced into a micro-flow cell using a carrier of CHCl3 and the IR spectrum was registered continuously. The absorbance, in the wavenumber range 1334-1300 cm-1, was measured, obtaining a peak as a function of time. The area of this peak was interpolated on a calibration line es…

Development of a polydimethylsiloxane–thymol/nitroprusside composite based sensor involving thymol derivatization for ammonium monitoring in water sa…

2014

This report describes a polydimethylsiloxane (PDMS)-thymol/nitroprusside delivery composite sensor for direct monitoring of ammonium in environmental water samples. The sensor is based on a PDMS support that contains the Berthelot's reaction reagents. To prepare the PDMS-thymol/nitroprusside composite discs, thymol and nitroprusside have been encapsulated in the PDMS matrix, forming a reagent release support which significantly simplifies the analytical measurements, since it avoids the need to prepare derivatizing reagents and sample handling is reduced to the sampling step. When, the PDMS-thymol/nitroprusside composite was introduced in water samples spontaneous release of the chromophore…

Quantification of melanin and hemoglobin in humain skin from multispectral image acquisition: use of a neuronal network combined to a non-negative ma…

2012

International audience; This article presents a multispectral imaging system which, coupled with a neural network-based algorithm, reconstructs reflectance cubes. The reflectance spectra are obtained using artificial neural-netwok reconstruction which generates reflectance cubes from acquired multispectral images. Then, a blind source separation algorithm based on Non-negative Matrix Factorization is used for the decomposition of human skin absorption spectra in its main pigments: melanin and hemoglobin. The analysis is performed on reflectance spectra. The implemented source separation algorithm is based on a multiplicative coefficient upload. The goal is to represent a given spectrum as t…