Results 61 to 70 of about 32,627 (198)
Two new endemic species of Portulaca (Portulacaceae) from the Brazilian Pampa grasslands
Nordic Journal of Botany, Volume 2026, Issue 10, October 2026.Portulaca L. is a monophyletic, cosmopolitan genus of succulent plants comprising ca 153 species, with particularly high diversity in xerophytic ecosystems in tropical and subtropical regions. Based on morphological evidence, we describe and illustrate two new species from the Brazilian Pampa, Portulaca guaritensis and Portulaca guenoa.
José Roberto Ferraz +3 more
wiley +1 more source
El centro-sudoeste de la provincia del Chaco (Argentina) : un bastión agrícola
Geográfica Digital, 2016 En función de las cotizaciones globales de algunos commodities, la provincia del Chaco dejó de ser una provincia predominantemente algodonera para convertirse en productora de soja.
Dante Edin Cuadra +1 more
doaj +1 more source
: Otra guerra del Chaco - corpus nivacle
, 2009 Sous-titrage : Pedro Rojas Torres, Nicolas Richard (2012-2015), San Pedro de AtacamaEl archivo Otra guerra del Chaco contiene documentos orales relativos a la ocupación militar de los territorios indígenas del Chaco boreal en el marco de la Guerra del ...
Rojas T., Pedro +4 more
core +6 more sources
Journal of Biogeography, Volume 53, Issue 10, October 2026.ABSTRACT Aim The Neotropical region is the most biodiverse in the world, and several hypotheses have been proposed to explain this pattern. Among them, the most prominent are the hypotheses of biotic interchange between domains, climatic refugia during the Pleistocene and geomorphological changes during the Miocene, such as the reorganization of the ...
Lucas O. Mello +5 more
wiley +1 more source
Caracterización química y cuantificación de fenoles totales en aceite de semillas de Cucurbita spp.
DomingueziaLos aceites vegetales son compuestos orgánicos que se obtienen a partir de semillas u otras partes de las plantas en cuyos tejidos se acumula como fuente de energía.
Gabriela Malena Valenzuela +2 more
doaj +2 more sources
The Landless Rural Workers Movement (MST) and New Agrarian Questions in Brazil
Journal of Agrarian Change, Volume 26, Issue 4, October 2026.ABSTRACT The Landless Rural Workers Movement of Brazil (MST) primarily organized occupations of large‐scale farms, forcing the redistribution of land for creation of agrarian reform settlements. In the past 20 years, however, land occupations and the establishment of new agrarian reform settlements have consistently declined, while the MST shifted ...
Estevan Coca, Gustavo de L. T. Oliveira
wiley +1 more source
Antigua MatanzaDurante la década de 1930 el Territorio Nacional del Chaco experimentó cambios excepcionales en su paisaje socioeconómico. El cultivo e industrialización del algodón fue uno de los motores principales que llevaron a esta jurisdicción a ser una de las más
Oscar Ernesto Mari
doaj +1 more source
The Global Pesticide Complex: Infrastructure, Fragility and Frontiers of Agrarian Change
Journal of Agrarian Change, Volume 26, Issue 4, October 2026.ABSTRACT Although most pesticides have long been on the market, the political economy surrounding their production, regulation and use has undergone considerable change, spurring renewed interest in the social sciences. The global pesticide complex (GPC) is an analytical device to understand the multidimensional nature of these changes. In this special
Marion Werner +3 more
wiley +1 more source
Alluvial ridge morphology on avulsing rivers
Sedimentology, Volume 73, Issue 6, Page 2311-2337, October 2026.ABSTRACT Alluvial ridges are built by preferential channel‐belt deposition and control river avulsions, yet a systematic analysis of their morphology has been missing. To address this gap, we analyse a globally distributed dataset of 8970 alluvial ridge flanks on 14 different rivers.
James H. Gearon, Douglas A. Edmonds
wiley +1 more source
Manifestaciones del dengue en tomografÃa computada de cerebro
Revista Argentina de RadiologíaIntroducción: El dengue es una enfermedad viral transmitida por artrópodos (Aedes aegypti). La región Nordeste de Argentina es una de las más afectadas, con un brote epidémico durante el periodo estival 2023-2024.
Melisa D. Pallud +5 more
doaj +1 more source