Results 41 to 50 of about 19,375 (191)

Using UPLC-MS/MS for Characterization of Active Components in Extracts of Yupingfeng and Application to a Comparative Pharmacokinetic Study in Rat Plasma after Oral Administration

open access: yesMolecules, 2017
Yupingfeng (YPF), a famous traditional Chinese medicine, which contains a large array of compounds, has been effectually used in health protection. A two-dimensional liquid chromatography (2D-LC) combined with quadrupole time-of-flight mass spectrometry (
Meng-Qi Jia   +4 more
doaj   +1 more source

Argentina: la expropiación de Repsol-YPF

open access: yesEstudios Internacionales, 2016
En 2012, el gobierno argentino expropió el 51% de las acciones de Yacimientos Petrolíferos Fiscales (YPF), de propiedad de la empresa española Repsol. La medida, según el gobierno de la entonces presidenta Cristina Fernández, buscaba retomar el control estatal de la petrolera para asegurar el autoabastecimiento energético del país.
openaire   +2 more sources

Are There Arbitrage Opportunities in Credit Derivatives Markets? A New Test and an Application to the Case of CDS and ASPs [PDF]

open access: yes, 2009
This paper analyzes possible arbitrage opportunities in credit derivatives markets using selffinancing strategies combining Credit Default Swaps and Asset Swaps Packages.
Mayordomo, Sergio   +2 more
core   +1 more source

Nuclear isotope thermometry [PDF]

open access: yes, 2000
We discuss different aspects which could influence temperatures deduced from experimental isotopic yields in the multifragmentation process. It is shown that fluctuations due to the finite size of the system and distortions due to the decay of hot ...
Donangelo, R.   +5 more
core   +2 more sources

Patagonian Imaginary Nature: Colonial Narratives in Documentary Films on Subnational Spaces (1920–1955)

open access: yesBulletin of Latin American Research, Volume 45, Issue 1, January 2026.
This study contributes to the ongoing historical examination of ecological and postcolonial questions in Latin America through the lens of new media genre narratives. Early 20th‐century documentary films of Argentine Patagonia institutionalised a natural binary opposition, positioning those challenging colonial power relations based on natural ...
Cielo Zaidenwerg, Mauricio Dimant
wiley   +1 more source

Costos de plantación y siembra directa de Prosopis flexuosa var. depressa (Fabaceae) para restauración ecológica

open access: yesActa Botanica Mexicana, 2022
Antecedentes y Objetivos: La capacidad para llevar a cabo una restauración ecológica en forma práctica requiere que sea considerada tanto la probabilidad de éxito en términos ecológicos como los costos económicos.
Daniel R. Pérez   +2 more
doaj   +1 more source

Un silicoflagelado en el Albiano medio de la Cuenca Austral, Argentina [PDF]

open access: yes, 2015
Calcareous nannofossil biostratigraphic investigations of Cretaceous sediments within the southern high latitude Austral Basin, Argentina, have revealed the presence of a fragment of a silicoflagellate possibly belonging to the species Variramus ...
Perez Panera, Juan Pablo
core   +1 more source

Transformaciones Recientes en la Industria Petrolera Argentina: El Caso de Yacimientos Petrolíferos Fiscales, 1989-2012 [PDF]

open access: yes, 2013
El objetivo central del artículo es analizar el derrotero de la empresa estatal petrolera Yacimientos Petrolíferos Fiscales (YPF), desde la privatización hasta su renacionalización (1989-2012).
Serrani, Esteban Carlos
core  

Effect of the Intrinsic Width on the Piezoelectric Force Microscopy of a Single Ferroelectric Domain Wall

open access: yes, 2008
Intrinsic domain wall width is a fundamental parameter that reflects bulk ferroelectric properties and governs the performance of ferroelectric memory devices.
Eliseev, Eugene A.   +4 more
core   +1 more source

Assembling for Water: The Prefigurative Politics of Land Futures in Argentina

open access: yesAntipode, Volume 57, Issue 6, Page 2213-2240, November 2025.
Abstract As in other areas of Argentina, residents from the Norte Neuquino in the northwestern reaches of Patagonia are concerned about the recent advancements of extractivism onto their territories. Their analysis is clear: the environmental crisis is directly linked to a democratic one, and they engage in a wide range of actions to envision and enact
Mattias Borg Rasmussen   +1 more
wiley   +1 more source

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