Results 51 to 60 of about 221,306 (224)

Introduced dung beetles suppress methane emissions from cattle dung and alter the temporal dynamics of greenhouse gas flux Los escarabajos peloteros introducidos suprimen las emisiones de metano del estiércol de ganado y alteran la dinámica temporal del flujo de gases de efecto invernadero Besouros coprófagos introduzidos suprimem as emissões de metano do esterco bovino e alteram a dinâmica temporal do fluxo de gases de efeito estufa

Ecological Entomology, EarlyView.
Dung beetles suppressed cumulative methane flux from cattle dung by 85% and reduced total greenhouse gas emissions by 18%. Beetle activity accelerated initial CO2 release but did not alter total cumulative flux. N2O and NH3 fluxes were transient and not consistently driven by beetle presence.
Jean Holley, Martin Brummell, Nigel R. Andrew   +2 more
wiley   +1 more source

Elevation shapes alpine snow algal blooms and their influence on albedo reduction

New Phytologist, EarlyView.
Graphical summary of elevational trends in Sanguina‐dominated snow algal blooms. Increasing elevation was associated with larger cells, lower Chla content per cell, higher astaxanthin ratios, lower snow water content, and reduced cell‐normalized albedo, whereas algal cell density showed no consistent elevational trend.
Pablo Almela, Scott Hotaling, J. Joseph Giersch, Helena C. L. Klip, James J. Elser, Trinity L. Hamilton   +5 more
wiley   +1 more source

La investigación en comunicación. Los límites y limitantes del conocimiento

Co-herencia: Revista de Humanidades, 2012
Este artículo busca debatir las preguntas concernientes al campo de estudio de la comunicación, su objeto y el público objetivo de sus avances.
Sergio Roncallo-Dow, Enrique Uribe-Jongbloed, Isabel Calderón-Reyes   +2 more
doaj   +1 more source

National Relics: Secular Sacrality, Museums, and Heritage‐Making in Nineteenth‐Century Chile

Museum Anthropology, Volume 49, Issue 2, Fall 2026.
ABSTRACT This article examines how objects and bodily remains are transformed and ritualized into national relics through collecting and exhibiting practices in museums. Focusing on nineteenth‐century Chile, it draws on archival sources, material culture theory, and the anthropology of religion to argue that objects associated with Chile's nation‐state
Hugo Rueda Ramírez
wiley   +1 more source

How Different Patterns of Policy Attention Drive Policy Diffusion: Evidence From China's River Chief System

Policy Studies Journal, Volume 54, Issue 3, August 2026.
ABSTRACT Despite extensive research on policy diffusion, the ways in which policy attention influences this process remain underexplored. This study addressed this gap by distinguishing between three types of policy attention—political speeches, policy issuance and field visits—and investigating their differential impacts when delivered by central and ...
Xiangning Chen, Yahua Wang
wiley   +1 more source

Estudio analítico de un transistor de efecto de campo de Arseniuro de Galio [PDF]

, 1979
Se describe un método para obtener los parámetros de dispersión de un GaAsFET, en función de sus parámetros geométricos, del material semiconductor y de las condiciones de polarización para la banda de frecuencias desde 3.7 hasta 4.2 GigaHertz.
Juan Pérez Téllez
core  

Algunas reflexiones epistemológicas sobre la investigación educativa

Educar, 1988
En este trabajo la autora parte de que el campo de la investigación en educación esta lejos de constituir un mapa bien delimitado, definido y eficaz. Se plantea una serie de factores que inciden en esta situación y se detiene en hacer propuestas que ...
Carme Vidal Xifré
doaj   +1 more source

Assessing the evolutionary distinctiveness of a highly threatened plant group: The urgency to preserve a unique lineage of evolution in Brazil

PLANTS, PEOPLE, PLANET, Volume 8, Issue 4, Page 1223-1237, July 2026.
Brazil's diverse flora is under several threats, with many unique lineages facing extinction, particularly in biodiverse regions like the Cerrado and campo rupestre. This study sheds light on the conservation needs of Cambessedesia (Melastomataceae), an endemic genus with 95% of its species endangered, using an approach to rank and prioritise species ...
Najla Bastos Scheidegger, Raquel C. Pizzardo, Bruno Vilela, Thuane Bochorny, Juliana Gastaldello Rando   +4 more
wiley   +1 more source

Estudio paleomagnético del volcanismo de Campos de Calatrava [PDF]

, 1994
A first systematic paleomagnetic study has been carried out in the upper Miocene-Pliocene volcanism of the Campos de Calatrava region. 18 localities have been sampled and 14 of them yielded useful paleomagnetic results. A Pliocene paleomagnetic pole has been obtained for the Iberian Plate (Lat.=82.1ºN, Long.= 171.6ºE, A95=6.9).
Bógalo Román, Mª Felicidad, Osete López, María Luisa, Ancochea Soto, Eumenio, Villalaín Santamaria, Juan José   +3 more
openaire   +3 more sources

Balancing tracks and trees: Assessing railroad impact on Brazilian biodiversity

PLANTS, PEOPLE, PLANET, Volume 8, Issue 4, Page 1345-1356, July 2026.
The Brazilian West–East Integration Railway (FIOL) aims to boost the national economy by improving commodity transport; however, it crosses three of Brazil's most biodiverse and fragile regions: the Caatinga, Cerrado and Atlantic Forest. Using digitised plant records and land‐use analyses, our study reveals significant vegetation loss within the ...
Ana Luiza Silva Rocha, Anselmo Nogueira, Matheus Colli‐Silva, Juliana Gastaldello Rando   +3 more
wiley   +1 more source