Search results for "Andes"
showing 10 items of 263 documents
El capitalismo, contra el planeta / 3
2007
Bibliotecas versus librerías de grandes superficies comerciales : usuarios y clientes
2007
En este artículo se analiza la polémica que surgió en Estados Unidos en 1998 entre la pervivencia de la biblioteca tradicional y una nueva forma de entender la información en las librerías de las grandes superficies comerciales. Después de una breve historia del origen de las grandes librerías y su posterior integración en las grandes superficies comerciales se examina como ha influido en la biblioteca esta nueva práctica empresarial. Cómo pretende convertir al usuario en cliente y obligarle a pagar por determinados servicios bibliotecarios. Por último, reflexiona de la manera que la popularización del ordenador y la irrupción de Internet han reforzado el papel de la biblioteca como centro …
Les Grandes Plaines des Etats-Unis : une Amérique du déclin démographique
2003
The Shinking of Population in the Great Plains of the United States. In the Plain States (Kansas, Nebraska, South Dakota and North Dakota), where many of the American counties experiencing losses in population are concentrated, the variety of population dynamics is wider than expected. Besides persistent decline linked to rural outmigration and ageing in remote locations, the is also a rapid growth of the principal metropolitan areas of the region. In several counties, the reversal of demographic fortunes is linked to the recent creation of large meatpacking plants, which have recruited Mexican labor. The sudden arrival of Hispanics in small rural towns has generated tensions. The magnitude…
¿Un ministro para la esperanza? / y 2
2004
Geochemical evidence for arsenic cycling in living microbialites of a High Altitude Andean Lake (Laguna Diamante, Argentina)
2020
Arsenic is best known as an environmental toxin, but this element could also serve as a metabolic energy source to certain microorganisms. Moreover, As cycling may have driven microbial life on early Earth prior to oxygenation of the atmosphere. Still, little is known about the arsenic cycling processes occurring in the presence of microorganisms and the possible traces that could be preserved in the rock record. To advance our understanding of this we studied the geochemical proxies of microbial As metabolism in living microbialites from Laguna Diamante, a likely Precambrian ecosystem analogue (Catamarca, Argentina). In this study, we show that the coexistence of As(III) and As(V) strongly…
Risques gélifs sur grandes cultures dans un contexte de changement climatique
2014
International audience
Candesartan Cilexetil In Vitro-In Vivo Correlation: Predictive Dissolution as a Development Tool
2020
[EN] The main objective of this investigation was to develop an in vitro-in vivo correlation (IVIVC) for immediate release candesartan cilexetil formulations by designing an in vitro dissolution test to be used as development tool. The IVIVC could be used to reduce failures in future bioequivalence studies. Data from two bioequivalence studies were scaled and combined to obtain the dataset for the IVIVC. Two-step and one-step approaches were used to develop the IVIVC. Experimental solubility and permeability data confirmed candesartan cilexetil. Biopharmaceutic Classification System (BCS) class II candesartan average plasma profiles were deconvoluted by the Loo-Riegelman method to obtain th…