Results 41 to 50 of about 217,356 (252)

Eye Darkening Under Dehydration Stress in the Neotropical Frog Boana punctata (Schneider, 1799)

open access: yesJournal of Experimental Zoology Part A: Ecological and Integrative Physiology, EarlyView.
Dehydration induces a strong and partially reversible increase in iris pigmentation in the Neotropical frog Boana punctata. The tight relationship between iris darkening and hydration state identifies ocular pigmentation as a simple, non‐invasive physiological biomarker with broad potential for assessing hydric stress in amphibian populations ...
Ricardo Reques   +5 more
wiley   +1 more source

Vitex oreadica and V. umbellata (Lamiaceae): two new species from Cerrado and Atlantic forest of Brazil

open access: yesNordic Journal of Botany, EarlyView.
Vitex L. is a pantropical genus of Lamiaceae comprising 209 taxa. Brazil harbors 35 species, representing nearly 50% of the genus richness in the Neotropics, with the Amazon showing the highest richness, followed by the Atlantic Forest and Cerrado domains. Nevertheless, most taxonomic studies of the genus have been conducted in Africa and Asia.
Thaís Teixeira Conegiro   +2 more
wiley   +1 more source

Seminario Internacional Desenvolvimento rural e agricultura familiar [PDF]

open access: yes, 2002
Este documento contiene las ponencias presentadas en el Seminário Desenvolvimento Rural e Agricultura Familiar, asímismo conclusiones y ...
Instituto Interamericano de Cooperación para la Agricultura (IICA)
core  

El Caucho Artículo de Vital Importancia

open access: yesRevista Facultad Nacional de Agronomía Medellín, 1942
Como es bien sabido, el caucho es un producto originario de la América del Sur. Ya en su segundo viaje al nuevo mundo Cristóbal Colón vio a los nativos dedicados a unos juegos en los que usaban grandes bolas de goma, sacada del árbol del caucho.
Ministerio de Agricultura y Comercio Revista de Agricultura y Comercio
doaj  

Agricultura 4.0

open access: yesRevista Agraria, 2023
La Agricultura 4.0 se basa en disponer de toda la información suministrada por la gran cantidad de sensores que “coexisten” en una explotación agrícola; en centralizarla a través de internet para permitir la toma de decisiones inteligentes a partir de ella, bien en tiempo real, bien en diferido.
Jesús Rodolfo Valenzuela-García   +2 more
openaire   +1 more source

Multi‐Platform Deployments of Low‐Cost Devices for Cetacean Passive Acoustic Monitoring

open access: yesRemote Sensing in Ecology and Conservation, EarlyView.
Recent advances in affordable, user‐friendly devices offer new opportunities to overcome cost constraints of underwater passive acoustic monitoring (PAM) and expand acoustic data collection. In this study, we deployed low‐cost acoustic recorders and underwater cameras across a range of platforms in the Western Mediterranean, including fishing gear ...
Greta Jankauskaite   +8 more
wiley   +1 more source

Opciones estratégicas para la agricultura [PDF]

open access: yes, 1999
Este documento presenta y articula el primer comienzo con la presentación de la calidad como opción estratégica para el quehacer de la Institución, luego entrega una interesante visión respecto a la situación de la agricultura inserta en el contexto ...
Instituto Interamericano de Cooperación para la Agricultura (IICA)
core  

Lina Britto. El boom de la marihuana. Auge y caída del primer paraíso de las drogas en Colombia

open access: yesHistoria y Sociedad
Reseña del libro Lina Britto. El boom de la marihuana. Auge y caída del primer paraíso de las drogas en Colombia. Bogotá: Crítica - Universidad de los Andes, 2022, 490 pp.
Juan-Daniel Guisao-Álvarez
doaj   +1 more source

Estudo numérico do impacto da mudança climática sobre o rendimento de trigo, soja e milho Numerical study of the impact of climate change on the yield of wheat, soybean and maize

open access: yesPesquisa Agropecuária Brasileira, 2006
O objetivo deste trabalho foi avaliar, por meio de estudo numérico, a existência de impacto da possível mudança climática sobre o rendimento das culturas do trigo, soja e milho, em Santa Maria, RS. Foram criados cenários de mudança climática, dobrando-se
Nereu Augusto Streck   +1 more
doaj   +1 more source

Social Sustainability in Circular Bioeconomy Business Models: Insights From Argentina

open access: yesSustainable Development, EarlyView.
ABSTRACT Research on circular bioeconomy business models (CBEBM) has largely prioritised environmental and economic aspects, leaving out the social pillar. To address this gap, this paper analyses to what extent and in what ways social sustainability is integrated into CBEBM, based on 12 cases from northern Argentina, a region with high potential for ...
Celina N. Amato   +2 more
wiley   +1 more source

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