Results 31 to 40 of about 275,888 (160)

Rapid Ocean Warming Drives Sexually Divergent Habitat Use in a Threatened Predatory Marine Ectotherm

open access: yesGlobal Change Biology, Volume 31, Issue 7, July 2025.
How ectothermic, mobile marine predators are responding to climate change is uncertain due to lack of species‐specific data, which can mask the true impact of this threat. We investigate the impact of environmental conditions and thermal extremes on the behavior and distribution of angelsharks, a highly threatened elasmobranch of global conservation ...
Lucy R. Mead   +14 more
wiley   +1 more source

Environmental magnetism / R. Thompson and F. Oldfield

open access: yesGeofísica Internacional, 1988
Este libro sobre “Magnetismo Ambiental” de Roy Thompson (Universidad de Edimburgo, Reino Unido) y de Frank Oldfield (Universidad de Liverpool, Reino Unido) presenta en una forma atractiva y concisa un campo nuevo de estudios interdisciplinarios en donde ...
J. Urrutia Fucugauchi
doaj   +1 more source

Sustancia tóxica DDT en el Ecuador ¿Se cumplen las normas del derecho internacional, constitucional y de la legislación vigente?. [PDF]

open access: yes, 2013
International agreements, conventions and laws governing the use of DDT are backed up by volumes of highly critical scientific research. Three important international conventions are specifically referred to in this investigation into the question of to ...
Echeverría Angulo, Julisa Mariana
core  

Hydrological Connectivity Enhances Fish Biodiversity in Amazonian Mining Ponds: Insights From eDNA and Traditional Sampling

open access: yesMolecular Ecology, Volume 34, Issue 11, June 2025.
ABSTRACT Artisanal and small‐scale gold mining (ASGM) expansion in the Madre de Dios region of the Peruvian Amazon has transformed primary forests into a novel wetland complex of thousands of abandoned mining ponds. Despite their ecological relevance, post‐mining recovery of these systems remains understudied, particularly regarding fish biodiversity ...
Camila Timana‐Mendoza   +7 more
wiley   +1 more source

Prácticas de análisis estadístico de datos geoquímicos con el programa R [PDF]

open access: yes, 2013
Son muchas las materias de carácter geológico como geoquímica, prospección geoquímica, petrología, recursos minerales, mineralogía ambiental, etc., donde el análisis estadístico de datos geoquímicos es una herramienta básica y necesaria. La toma de datos
Benavente, David   +3 more
core   +1 more source

Espacios rupestres como «obras abiertas»: una mirada a los procesos de confección y transformación de los abrigos con arte rupestre del este de Catamarca (Argentina) [PDF]

open access: yes, 2014
In this paper we attempt to advance the understanding of the process of painting in caves with rock art at Ancasti’s Highlands (Catamarca Province, Argentina) from chemical analysis of pigment mixtures with which the paintings have been made.
Burgos, Omar   +4 more
core   +2 more sources

Breaking into nature's secret medicine cabinet: lichens – a biochemical goldmine ready for discovery

open access: yesNew Phytologist, Volume 246, Issue 2, Page 437-449, April 2025.
Summary Secondary metabolites are a crucial source of bioactive compounds playing a key role in the development of new pharmaceuticals. Recently, biosynthetic research has benefited significantly from progress on various fronts, including reduced sequencing costs, improved genome/metabolome mining strategies, and expanding tools/databases to compare ...
Garima Singh   +3 more
wiley   +1 more source

ESTUDIOS QUÍMICOS DE AMBROSIA CUMANENSIS KUNTH EN PANAMÁ

open access: yesTecnociencia, 2019
Ambrosia cumanesis K (Asteraceae), conocida como Altamisa, es una especie aromática distribuida ampliamente en el país. Se ha asociado su uso al tratamiento de afecciones renales, como antiinflamatorio, antiparasitario y purgante, por lo que se realizó ...
Laura P. Patiño C.   +5 more
doaj  

El Oxígeno: veneno o fármaco

open access: yesRevista Electrónica de AnestesiaR, 2009
El oxígeno como molécula es sin duda un veneno bastante agresivo que la naturaleza ha sabido aprovechar y amortiguar para obtener mayor beneficio energético de sus procesos químicos.
Ivaylo Grigorov Tzenkov
doaj   +1 more source

Is there a relationship between prenatal cannabis exposure and the development of aggressive behaviour? [PDF]

open access: yes, 2019
Treball Final de Grau en Psicologia. Codi: PS1048. Curs: 2018/2019.Numerous studies focusing on the effects of cannabis use at the psychobiological level have shown cognitive impairment as well as memory and attention deficits.
Castro Valera, Iván José
core  

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