Results 101 to 110 of about 18,668 (186)

Epistemic opacity in Antarctic science: Unknowing the last frontier

open access: yesPeople and Nature, Volume 8, Issue 6, Page 1641-1647, June 2026.
Abstract Antarctica is facing intensifying pressures from climate change, industrial fishing, tourism and renewed geopolitical competition, even as scientific activity on the continent reaches unprecedented levels. We argue that this proliferation of research often fails to deliver the integrated, policy‐relevant knowledge needed for precautionary ...
Virginia Morandini, Álvaro Soutullo
wiley   +1 more source

Enseñanza e investigación bioantropológica en la Argentina / Education and bio-anthropological research in Argentina

open access: yes, 2015
La información para la elaboración de esta ponencia se obtuvo a partir de: I) encuestas realizadas a los docentes e investigadores que en la Argentina desarrollan sus actividades dentro del campo de la Antropología Biológica.
Francisco R. Carnese   +1 more
core  

Burmannia tenella (Burmanniaceae) in Costa Rica: A new addition to the flora of Central America, with an overview of its geographic distribution

open access: yesActa Botanica Mexicana
Background and Aims: Burmannia tenella is a holo-mycoheterotrophic species widely distributed in the Amazon Biome. The objectives of this study are to report the presence of this species in Costa Rica, to present an overview of its geographic ...
Leonardo Álvarez Alcázar   +2 more
doaj   +1 more source

Snapshots of Motion: A Novel Structural Intermediate Reveals Conserved Dynamics in Archaeal DNA Ligases

open access: yesProteins: Structure, Function, and Bioinformatics, Volume 94, Issue 6, Page 1245-1258, June 2026.
ABSTRACT We present the first x‐ray crystallographic structural evidence of an archaeal DNA ligase showing the AMP covalent adduct together with further cofactor hydrolysis, capturing a transient intermediary in the first step of the ligation reaction, triggered by the pyrophosphate hydrolysis.
A. X. Quintana‐Armas   +3 more
wiley   +1 more source

Oportunidades de desarrollo de comunidades de investigación mediante la aplicación de la metáfora biológica

open access: yes, 2013
La construcción y eldesarrollo de comunidades de investigación en Colombia es un gran reto, enespecial cuando el país solo invierte 0,37% del pib(Monsalve, 2011), a pesar de ello, los académicos han realizado importantes esfuerzos:el Ranking ...
Montoya, Iván Alonso   +2 more
core   +2 more sources

Rickettsiales in South America: A Systematic Review of Their Molecular Detection and Distribution in Arthropods and Vertebrates

open access: yesPublic Health Challenges, Volume 5, Issue 2, June 2026.
ABSTRACT Bacteria of the order Rickettsiales comprise a diverse group of obligate intracellular microorganisms that are globally distributed and highly prevalent in tropical and subtropical regions. In South America, these bacteria have been associated with arthropod vectors, such as ticks, fleas, mites, lice, and certain dipterans, as well as with a ...
Cristian J. Zamorano‐Gómez   +3 more
wiley   +1 more source

Grupo Infantil Diversibio : tejiendo nuestra diversidad biológica y cultural

open access: yes, 2019
Spa: La presente investigación escolar es una propuesta Presentada ante el Centro de Investigación de la Universidad Pedagógica Nacional-CIUP- en el que se intenta consolidar y fortalecer un grupo infantil denominado DIVERSIBIO: "Tejiendo nuestra ...
Parra Rivera, Paula Milena   +2 more
core  

Quinoa Protein Concentrate as a Platform for the Protection and Controlled Delivery of Resveratrol and Tocopherol

open access: yesSustainable Food Proteins, Volume 4, Issue 2, June 2026.
Graphical abstract illustrating the development of quinoa protein (QP) nanocarriers for the encapsulation of resveratrol (RSV) and tocopherol (TOC). ABSTRACT The objective of this work was to generate and characterize complexes of quinoa proteins (QP) with either resveratrol (RSV) or tocopherol (TOC) whose dimensions fell into the nanoscale.
Alejandra J. Rubinstein   +3 more
wiley   +1 more source

La investigación en la Reserva Biológica Alberto Ml Brenes, San Ramón, Costa Rica (1975-2005)

open access: yes, 2016
Se hace una reseña de la investigación en la Reserva Biológica Alberto Ml. Brenes (San Ramón, Costa Rica); se analizan cerca de 340 publicaciones relacionadas con la investigación en períodos de 5 años, desde 1975 a 2005.
Salazar Rodríguez, Alberto Hámer
core  

Phylogenetic analysis and the recognition of a new genus for Mexican Crassulaceae segregated from Echeveria

open access: yesTAXON, Volume 75, Issue 3, June 2026.
Abstract Systematic knowledge of the Mexican Crassulaceae is slowly progressing as data from new DNA regions and species sampling efforts increase. We compiled and generated new rbcL, matK, rps16, ITS/ITS2, and ETS DNA sequences and performed an updated phylogenetic reconstruction for a group of 131 Mexican Crassulaceae terminals from 11 of the 13 ...
Luis Emilio de la Cruz‐López   +1 more
wiley   +1 more source

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