Results 11 to 20 of about 10,100 (172)

Método de Conductividades para Determinación de Azufre

Revista de Ciencias, 1993
Se presenta un método alterno y rápido para determinación de azufre en carbones por medida de conductancia de los productos de la combustión, encontrando el contenido de azufre de una curva de calibración que relaciona contenido de azufre, en mg, contra
Nelly de Palacios
doaj   +2 more sources

Gas Leakage From Shallow Ponding Magma and Trapdoor Faulting at Sierra Negra Volcano (Isabela Island, Galápagos)

Geochemistry, Geophysics, Geosystems, 2022
We report on new volcanic gas composition results acquired in October 2017 at Minas de Azufre, a persistent fumarolic field topping the resurgent Sierra Negra caldera, in the Galápagos archipelago.
Alessandro Aiuppa, Patrick Allard, Benjamin Bernard, Francesco Maria Lo Forte, Roberto Moretti, Silvana Hidalgo   +5 more
doaj   +2 more sources

Acidophilic sulphate-reducing bacteria: Diversity, ecophysiology, and applications. [PDF]

Environ Microbiol Rep
Acidophilic sulphate‐reducing bacteria (aSRB) perform dissimilatory sulphate reduction under low pH and high metal conditions. They play key roles in the sulphur and carbon cycles in natural acidic environments, emphasized by their interactions with other microbial groups, which create an intricate ecological network. Potential applications of aSRB and
Valdez-Nuñez LF, Kappler A, Ayala-Muñoz D, Chávez IJ, Mansor M.   +4 more
europepmc   +2 more sources

Gradient evolution of body colouration in surface- and cave-dwelling Poecilia mexicana and the role of phenotype-assortative female mate choice. [PDF]

Biomed Res Int, 2013
Ecological speciation assumes reproductive isolation to be the product of ecologically based divergent selection. Beside natural selection, sexual selection via phenotype‐assortative mating is thought to promote reproductive isolation. Using the neotropical fish Poecilia mexicana from a system that has been described to undergo incipient ecological ...
Bierbach D, Penshorn M, Hamfler S, Herbert DB, Appel J, Meyer P, Slattery P, Charaf S, Wolf R, Völker J, Berger EA, Dröge J, Wolf K, Riesch R, Arias-Rodriguez L, Indy JR, Plath M.   +16 more
europepmc   +2 more sources

Eleven‐Year Survey of the Magmatic‐Hydrothermal Fluids From Peteroa Volcano: Identifying Precursory Signals of the 2018–2019 Eruption

Geochemistry, Geophysics, Geosystems, Volume 24, Issue 11, November 2023., 2023
Abstract Over the past decade, we have conducted geochemical and isotopic monitoring of the fumarolic gases of the Peteroa volcano (Argentina‐Chile). Using the resulting data set, we constructed a conceptual model that describes the evolution of the magmatic‐hydrothermal system and identifies precursory geochemical signals of the last eruption.
Mariano Agusto, María Clara Lamberti, Franco Tassi, Fabricio Carbajal, Joaquín Llano, Victoria Nogués, Nicolás Núñez, Hernán Sánchez, Andrea Rizzo, Sebastián García, Jazmín Yiries, María Laura Vélez, Antonella Massenzio, Gabriela Velasquez, Claudia Bucarey, Martín Gómez, Pablo Euillades, Víctor Ramos   +17 more
wiley   +1 more source

Climate Variability and Glacier Evolution at Selected Sites Across the World: Past Trends and Future Projections

Earth's Future, Volume 11, Issue 10, October 2023., 2023
Abstract The availability of freshwater from glaciers and snowmelt is of vital importance for people and ecosystems in the context of global climate change. Here, we focus on 25 glaciers located in different climates and latitudes and investigate their recent (1958–2020) and future projected trends (2020–2050 and 2070–2100) in monthly precipitation (Pr)
Amen Al‐Yaari, Thomas Condom, Clementine Junquas, Antoine Rabatel, Victor Ramseyer, Jean‐Emmanuel Sicart, Mariano Masiokas, Sophie Cauvy‐Fraunié, Olivier Dangles   +8 more
wiley   +1 more source

First Onset of Unrest Captured at Socompa: A Recent Geodetic Survey at Central Andean Volcanoes in Northern Chile

Geophysical Research Letters, Volume 50, Issue 10, 28 May 2023., 2023
Abstract We report the first detection of unrest at Socompa volcano during our recent survey of Central Andean volcanos in Northern Chile using Interferometric Synthetic Aperture Radar measurements spanning January 2018 to October 2021. We find that Socompa volcano, whilst initially undeforming and no recorded eruptions for 7.2 kyr, shows a steady ...
F. Liu, J. R. Elliott, S. K. Ebmeier, T. J. Craig, A. Hooper, C. Novoa Lizama, F. Delgado   +6 more
wiley   +1 more source

Correlations Between Subduction of Linear Oceanic Features and Arc Volcanism Volume Around the Pacific Basin

Geochemistry, Geophysics, Geosystems, Volume 23, Issue 12, December 2022., 2022
Abstract Arc volcanoes, created by magma generated from the dehydration of subducting slabs, show great variability in their sizes and along‐arc spatial distributions. In this study, we address a fundamental question, namely, how do subduction zones and volcanic arcs respond to the subduction of “atypical” oceanic lithosphere.
Claudia Adam, Valérie Vidal, Pablo Grosse, Mie Ichihara   +3 more
wiley   +1 more source

Resource competition explains rare cannibalism in the wild in livebearing fishes

Ecology and Evolution, Volume 12, Issue 5, May 2022., 2022
We assessed the occurrence of cannibalism in mosquitofishes (genus Gambusia) and guppies (Poecilia reticulata) by examining 17 species (11,946 individuals) across 189 populations in the wild, and by conducting a mesocosm experiment for one species (Gambusia affinis).
Rüdiger Riesch, Márcio S. Araújo, Stuart Bumgarner, Caitlynn Filla, Laura Pennafort, Taylor R. Goins, Darlene Lucion, Amber M. Makowicz, Ryan A. Martin, Sara Pirroni, R. Brian Langerhans   +10 more
wiley   +1 more source

Amonio y sulfato en el crecimiento, actividad fisiológica y estado nutrimental de las plantas de lisianthus cv. ABC 1-2 rosado oscuro

Nova Scientia, 2022
El nitrógeno (N) y azufre (S) son nutrimentos que tienen una fuerte interacción en sus vías de asimilación. Por lo tanto, la adición de estos en una adecuada proporción influye positivamente en el desarrollo de las plantas.
Armando Hernández Pérez, Luis Alonso Valdez Aguilar , Juana Cruz García Santiago, Alonso Méndez López, José Antonio González Fuentes, Vicente Torres Olivar, Daniela Alvarado Camarillo , Fabiola Aureoles Rodríguez, Perpetuo Álvarez Vázquez   +8 more
doaj   +1 more source