Results 11 to 20 of about 156 (118)

Snapshots of Motion: A Novel Structural Intermediate Reveals Conserved Dynamics in Archaeal DNA Ligases. [PDF]

Proteins
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.
Quintana-Armas AX, Flores-Hernández E, Cardona-Félix C, Rudiño-Piñera E.   +3 more
europepmc   +2 more sources

Morphological and molecular evidence reveals a new species of Characidium from the Ucayali-Urubamba Piedmont, Peru, and novel molecular clades are proposed within the genus. [PDF]

J Fish Biol
Abstract A new species of Characidium is described from the Urubamba River basin, within the Ucayali‐Urubamba Piedmont ecoregion, Peru. The new species can be readily distinguished from all congeners, except Characidium cacah, Characidium chicoi, Characidium helmeri, Characidium mirim, Characidium nana, Characidium nupelia, Characidium sterbai ...
Oliveira-Silva L, Britzke R, Meza-Vargas V, Hidalgo MH, Faustino-Fuster D, Oliveira C, Zanata AM.   +6 more
europepmc   +2 more sources

Key concepts and a world-wide look at plant recruitment networks. [PDF]

Biol Rev Camb Philos Soc
ABSTRACT Plant–plant interactions are major determinants of the dynamics of terrestrial ecosystems. There is a long tradition in the study of these interactions, their mechanisms and their consequences using experimental, observational and theoretical approaches.
Alcántara JM, Verdú M, Garrido JL, Montesinos-Navarro A, Aizen MA, Alifriqui M, Allen D, Al-Namazi AA, Armas C, Bastida JM, Bellido T, Paterno GB, Briceño H, Camargo de Oliveira RA, Campoy JG, Chaieb G, Chu C, Constantinou E, Delalandre L, Duarte M, Faife-Cabrera M, Fazlioglu F, Fernando ES, Flores J, Flores-Olvera H, Fodor E, Ganade G, Garcia MB, García-Fayos P, Gavini SS, Goberna M, Gómez-Aparicio L, González-Pendás E, González-Robles A, İpekdal K, Kikvidze Z, Ledo A, Lendínez S, Liu H, Lloret F, López RP, López-García Á, Lortie CJ, Losapio G, Lutz JA, Máliš F, Manzaneda AJ, Marcilio-Silva V, Michalet R, Molina-Venegas R, Navarro-Cano JA, Novotny V, Olesen JM, Ortiz-Brunel JP, Pajares-Murgó M, Perea AJ, Pérez-Hernández V, Pérez-Navarro MÁ, Pistón N, Prieto I, Prieto-Rubio J, Pugnaire FI, Ramírez N, Retuerto R, Rey PJ, Rodriguez-Ginart DA, Sánchez-Martín R, Tavşanoğlu Ç, Tedoradze G, Tercero-Araque A, Tielbörger K, Touzard B, Tüfekcioğlu İ, Turkis S, Usero FM, Usta-Baykal N, Valiente-Banuet A, Vargas-Colin A, Vogiatzakis I, Zamora R.   +79 more
europepmc   +2 more sources

Bioseguridad estadounidense y la emergencia de la vigilancia epidemiológica global: analizando la genealogía de un problema

Norteamérica, 2022
El desarrollo de sistemas de vigilancia de enfermedades infecciosas con alcance global y adaptados para identificar amenazas biológicas inesperadas no son consecuencia de una evolución científica “natural”.
Alexis Bedolla
doaj   +1 more source

STAT6 controls the stability and suppressive function of regulatory T cells

European Journal of Immunology, Volume 53, Issue 5, May 2023., 2023
Through a series of in vitro and in vivo experiments, we have demonstrated that STAT6 signaling is crucial for controlling Tregs stability and suppressive function by modulating the Treg‐specific demethylated region (TSDR) methylation state of the FOXP3 gene in homeostatic and inflammatory conditions.
Rubén D. Arroyo‐Olarte, Ana Rivera‐Rugeles, Eduardo Nava‐Lira, Ángel Sánchez‐Barrera, Yadira Ledesma‐Soto, Rafael Saavedra, Leonel Armas‐López, Luis I Terrazas, Federico Ávila‐Moreno, Sonia Leon‐Cabrera   +9 more
wiley   +1 more source

Biotecnología: bioseguridad y biocustodia en la investigación biotecnológica

Arbor: Ciencia, Pensamiento y Cultura, 2014
Los avances en Biotecnología y en Bioinformática han sido tan espectaculares en los últimos años que han llevado a la reconstrucción de agentes biológicos y al diseño y síntesis de cromosomas artificiales.
Rafael Pérez Mellado
doaj   +1 more source

Historical ecology and current abundance of the translocated Chilla or Grey fox Lycalopex griseus on the large Tierra del Fuego Island shared by Argentina and Chile

Austral Ecology, Volume 48, Issue 3, Page 481-497, May 2023., 2023
In 1951, 24 animals of both sexes of Chilla or Grey fox from continental Magallanes region, Chile were released on Tierra del Fuego Island, to control a European rabbit irruption detrimental to sheep ranching. No attention has been paid to the temporal course of that introduction, so here we provide a historical account of the presence of those foxes ...
Carlos Zurita, Nicolás Soto, Fabian M. Jaksic   +2 more
wiley   +1 more source

Effects of the Severity of Wildfires on Some Physical-Chemical Soil Properties in a Humid Montane Scrublands Ecosystem in Southern Ecuador

Fire, 2022
Humid montane scrublands (HMs) represent one of the least studied ecosystems in Ecuador, which in the last decade have been seriously threatened by the increase in wildfires.
Vinicio Carrión-Paladines, María Belén Hinojosa, Leticia Jiménez Álvarez, Fabián Reyes-Bueno, Liliana Correa Quezada, Roberto García-Ruiz   +5 more
doaj   +1 more source

Ántrax y botulismo como armas biológicas

Educación Química, 2018
El término “guerra biológica” alude al uso de agentes patógenos, predominantemente virus, bacterias y toxinas, para provocar intencionalmente grandes epidemias asociadas a enfermedades con altos índices de mortalidad dentro del bando contrario (Butler ...
Diana Y. Zepeda Arriaga, Luis Manuel Perea Mejía, Raúl Garza Velasco, Sofía Reyes Huesca   +3 more
doaj   +1 more source

Bioterrorismo: sinopse evolutiva e intervenção sanitária atual

Territorium: Revista Portuguesa de riscos, prevenção e segurança, 2016
Após os ataques terroristas em 2011 aos Estados Unidos da América (EUA) e embora não tenha sido identificado nenhum na Europa, os países sofreram uma forte pressão de forma a estabelecerem planos para enfrentar este novo tipo de ameaça.
Gisélia Braga, Rui Ponce Leão, Romero Bandeira   +2 more
doaj   +1 more source