Results 51 to 60 of about 9,833 (194)

Biodiversity research requires more motors in air, water and on land

Methods in Ecology and Evolution, EarlyView.
Abstract Human activities have accelerated species extinctions, driving rapid biodiversity decline. Simultaneously, advancements in Artificial Intelligence (AI) and autonomous systems offer transformative potential for biodiversity research. Uncrewed vehicles—drones (aerial systems) and other robots (ground and underwater platforms)—equipped with high ...
Man Qi, Matthew Gadd, Daniele De Martini, Katrina J. Davis, Biao Xiong, Alice Rosen, Sruthi M. Krishna Moorthy, Nick Hawes, Roberto Salguero‐Gómez   +8 more
wiley   +1 more source

Toward a Biosignature for Suicide [PDF]

American Journal of Psychiatry, 2014
Suicide, a major cause of death worldwide, has distinct biological underpinnings. The authors review and synthesize the research literature on biomarkers of suicide, with the aim of using the findings of these studies to develop a coherent model for the biological diathesis for suicide.The authors examined studies covering a large range of ...
Maria A, Oquendo, Gregory M, Sullivan, Katherin, Sudol, Enrique, Baca-Garcia, Barbara H, Stanley, M Elizabeth, Sublette, J John, Mann   +6 more
openaire   +2 more sources

Prebiotic Organic Microstructures [PDF]

, 2011
Micro- and sub-micrometer spheres, tubules and fiber-filament soft structures have been synthesized in our experiments conducted with 3 MeV proton irradiations of a mixture of simple inorganic constituents, CO, N2 and H2O.
A Yoshihara, AM Hessler, CJ Hale, DI Foustoukos, F Klein, H Kurihara, J Takahashi, K Kobayashi, K Kobayashi, K Kobayashi, K Kobayashi, K Kvenvolden, Kensei Kobayashi, M Yoshizaki, Marie-Paule Bassez, MP Bassez, MP Bassez, O Botta, S Miyakawa, SL Seewald, T McCollom, T McCollom, Y Takano, Y Takano, Y Takano, Y Takano, Yoshinori Takano   +26 more
core   +2 more sources

Microbially generated ferruginous crusts: A potential biosignature of continental input in coastal settings

Sedimentology, EarlyView.
ABSTRACT Thin ferruginous sandy crusts are common on top of sandstone beds in the Early Permian post‐glacial deposits of the Paraná Basin in southern Brazil. These crusts usually preserve wrinkle structures, suggesting that they might be a product of microbial mediation.
Patrícia Weschenfelder, Renata Guimarães Netto, Alisson Klayton Martins   +2 more
wiley   +1 more source

Biosignatures Associated with Freshwater Microbialites [PDF]

Life, 2020
Freshwater microbialites (i.e., lithifying microbial mats) are quite rare in northern latitudes of the North American continent, with two lakes (Pavilion and Kelly Lakes) of southeastern BC containing a morphological variety of such structures. We investigated Kelly Lake microbialites using carbon isotope systematics, phospholipid fatty acids (PLFAs ...
Richard Allen White, Sarah A. Soles, Allyson L. Brady, Gordon Southam, Darlene S.S. Lim, Greg F. Slater   +5 more
openaire   +4 more sources

Nitrate-Dependent Iron Oxidation: A Potential Mars Metabolism [PDF]

, 2018
This work considers the hypothetical viability of microbial nitrate-dependent Fe2+ oxidation (NDFO) for supporting simple life in the context of the early Mars environment.
Abramov, Amils, Anand, Arevalo, Arnold, Arvidson, Bauermeister, Benz, Bibring, Bridges, Bridges, Bruce, Busigny, Byrne-Bailey, Cabrol, Canfield, Carlson, Carlson, Carr, Chakraborty, Chakraborty, Changela, Charlou, Chassefière, Chastain, Chaudhuri, Chevrier, Cockell, Cockell, Cockell, Comeau, Czaja, Dartnell, Edwards, Edwards, Edwards, Ehlmann, Ehlmann, Ehlmann, Ehrenreich, Emerson, Emerson, Emerson, Etique, Ettwig, Fassett, Filiberto, Fisk, Formisano, Fowler, Fox, Fox, Fox-Powell, Frydenvang, Gauger, Gendrin, Glavin, Grady, Gronstal, Grotzinger, Grotzinger, Hafenbradl, Hecht, Hedrich, Hicks, Hoefen, Hoehler, Hoppert, Hurowitz, Ilbert, Ionescu, Irwin, Jakosky, Jepsen, Johnson, Kappler, Kappler, Kappler, King, Kish, Klueglein, Klueglein, Konhauser, Konn, Kounaves, Kumaraswamy, Lack, Lalonde, Lanza, Laufer, Lopez-Reyes, Lovley, Lovley, Madigan, Mahaffy, Malin, Mangold, Manning, Martin, Martín-Torres, Marzo, McSween, McSween, Michalski, Millero, Ming, Ming, Miot, Miot, Miot, Miot, Miot, Miot, Miot, Miot, Mirvaux, Montoya, Morgan, Morris, Morris, Morris, Muehe, Myers, Nachon, Navarro-González, Nealson, Nie, Nixon, Nixon, Nixon, Oren, Osinski, Palucis, Pantke, Parnell, Pirajno, Popa, Raghoebarsing, Raiswell, Ramirez, Rampe, Rampe, Reimers, Revsbech, Roden, Santelli, Schieber, Schuerger, Schwenzer, Schwenzer, Schädler, Sephton, Sholes, Smith, Smith, Squyres, Squyres, Squyres, Steele, Stern, Stern, Stevens, Straub, Straub, Straub, Strohm, Summers, Summers, Summers, Sutter, Toporski, Tosca, Tosca, Tuff, Vaniman, Visscher, Wacey, Weber, Weber, Weber, Webster, Welhan, Wheat, Williams, Yen, Yen   +185 more
core   +4 more sources

Fluorination of Silver Phosphate in Nickel Reaction Vessels for Triple Oxygen Isotope Analysis

Rapid Communications in Mass Spectrometry, Volume 40, Issue 7, 15 April 2026.
ABSTRACT Rationale Increasingly, more laboratories are measuring the triple oxygen isotope values of phosphate. Standardization is key to having good interlaboratory results. Here, we present the triple oxygen isotope values of a suite of standards using fluorination and compare them with previously reported triple oxygen isotope values. Methods Silver
Jordan A. G. Wostbrock, Drake Yarian, Isabella Chiaravalloti, Spencer R. Moller, Ruth E. Blake   +4 more
wiley   +1 more source

The Chemical Composition of {\tau} Ceti and Possible Effects on Terrestrial Planets

, 2015
{\tau} Ceti (HD10700), a G8 dwarf with solar mass of 0.78, is a close (3.65 pc) sun-like star where 5 possibly terrestrial planet candidates (minimum masses of 2, 3.1, 3.5, 4.3, and 6.7 Earth masses) have recently been discovered. We report abundances of
Pagano, Michael, Shim, Sang-Heon, Truitt, Amanda, Young, Patrick A.   +3 more
core   +1 more source

Spectral Evolution of an Earth-Like Planet [PDF]

, 2006
We have developed a characterization of the geological evolution of the Earths atmosphere and surface in order to model the observable spectra of an Earth-like planet through its geological history.
Cloud P. E., Kenneth W. Jucks, Lisa Kaltenegger, Lovelock J. E., Wesley A. Traub   +4 more
core   +2 more sources

Coupled authigenic Mg silicate and carbonate precipitation in saline lakes of the Salar de Atacama, Northern Chile

The Depositional Record, Volume 12, Issue 1, February 2026.
Sediments, unlithified and lithified microbial mats in the Salar de Atacama, are formed by similar pathways involving coupled precipitation of authigenic Mg silicate and calcium carbonate. Differences in products reflect differences in the initial distribution of organic biomass.
Erica P. Suosaari, Christophe Dupraz, Amanda M. Oehlert, Ioan Lascu, Brooke E. Vitek, Alan M. Piggot, Alvaro T. Palma, R. Pamela Reid   +7 more
wiley   +1 more source