Results 11 to 20 of about 178 (117)

The frequency and importance of polyploidy in tropical rainforest tree radiations. [PDF]

New Phytol
Summary The presence of more than two copies of the genome in an organism, termed ‘polyploidy’, is a crucial force in plant evolution, generating genetic, phenotypic and ecological diversity. [Correction added on 22 January 2026, after first online publication: the preceding sentence has been corrected.] The Amazonian tree flora is the most species ...
Schley RJ, Piñeiro R, Nicholls JA, Gaynor ML, Lewis GP, Fonseca Pezzini F, Dexter KG, Kidner C, Pennington RT, Twyford AD.   +9 more
europepmc   +2 more sources

On the Bivariate Nakagami‐Lognormal Distribution and Its Correlation Properties

International Journal of Antennas and Propagation, Volume 2014, Issue 1, 2014., 2014
The bivariate Nakagami‐lognormal distribution used to model the composite fast fading and shadowing has been examined exhaustively. In particular, we have derived the joint probability density function, the cross‐moments, and the correlation coefficient in power terms.
Juan Reig, Lorenzo Rubio, Vicent M. Rodrigo-Peñarrocha, Jose F. Paris   +3 more
wiley   +1 more source

Fading Evaluation in the 60 GHz Band in Line‐of‐Sight Conditions

International Journal of Antennas and Propagation, Volume 2014, Issue 1, 2014., 2014
An exhaustive analysis of the small‐scale fading amplitude in the 60 GHz band is addressed for line‐of‐sight conditions (LOS). From a measurement campaign carried out in a laboratory, we have estimated the distribution of the small‐scale fading amplitude over a bandwidth of 9 GHz. From the measured data, we have estimated the parameters of the Rayleigh,
J. Reig, M.-T. Martínez-Inglés, L. Rubio, V.-M. Rodrigo-Peñarrocha, J.-M. Molina-García-Pardo, Jose F. Paris   +5 more
wiley   +1 more source

Gamma irradiated human skin allograft: a potential treatment modality for lower extremity ulcers [PDF]

Int Wound J, 2004
Allogreffe cutanée humaine irradiée aux rayons gamma: un mode de traitement possible pour les ulcers des members inférieurs Les allogreffes cutanées humaines irradiée aux rayons gamma comprennent und erme et un épiderme. Contrairement aux tissusdérivés de la bioengenierie qui nécessitent un stockage au froidet une délai défini d’utilisation une fois ...
europepmc   +2 more sources

Spatiotemporal Dynamics of Non‐Ecological Speciation in Rubyspot Damselflies (Hetaerina spp.)

Molecular Ecology, Volume 34, Issue 12, June 2025.
ABSTRACT Non‐ecological speciation is a common mode of speciation, which occurs when allopatric lineages diverge in the absence of pronounced ecological differences. Yet, relative to other speciation mechanisms, non‐ecological speciation remains understudied.
C. Patterson, A. Brennan, H. Cowling, A. González‐Rodríguez, G. F. Grether, L. Mendoza Cuenca, M. Springer, Y. M. Vega‐Sánchez, J. Drury   +8 more
wiley   +1 more source

Mutagénesis inducida en microbulbos de Allium sativum L.

Acta Agronómica, 2015
Se estableció un protocolo de mutagénesis en microbulbos de ajo (Allium sativum L.) clon Boconó cultivado in vitro. Para el efecto se realizaron dos ensayos, uno de radiosensibilidad para establecer la dosimetría apropiada de radiación gamma y otro de ...
Adriana Pardo Roldán
doaj   +1 more source

Caracterización molecular de mutantes de Agave tequilana inducidas con radiación gamma Co60 y su efecto en la acumulación de fructooligosacáridos

Acta Universitaria, 2020
La variabilidad genética en Agave tequilanaes limitada debido a la manera clonal de reproducción en campo. En el presente trabajo se indujeron mutaciones en plantas de Agave tequilanamicropropagadas in vitrovía embriogénesis ...
Alejandro Ángeles-Espino, Hilda Eréndira Dimas-Estrada, David Ramírez-Alvarado, José Manuel Cruz-Rubio, Paola Andrea Palmeros-Suárez, Juan Florencio Gómez-Leyva   +5 more
doaj   +1 more source

Strong phylogenetic signal and models of trait evolution evidence phylogenetic niche conservatism for seagrasses

Journal of Ecology, Volume 112, Issue 3, Page 446-460, March 2024.
Our study highlights the relevance of evolution from common ancestors and shared history underpinning large seagrass phylogenetic structuring. Abstract Phylogenetic signal (PS) is the propensity of closely related species to resemble each other. PS has been tested across clades of terrestrial plants; however, insight for seagrasses is still lacking ...
Fernando Tuya, Javier Martínez‐Pérez, Álvaro Fueyo, Néstor E. Bosch   +3 more
wiley   +1 more source

Desarrollo de un sistema automatizado de escaneo por radiación gamma

Tecnología en Marcha, 2019
Las técnicas de medición por ensayos no destructivos han demostrado ser una poderosa herramienta en el estudio y caracterización de materiales. Este trabajo presenta el desarrollo de un sistema automatizado para la medición de la atenuación de radiación ...
Francisco Rodríguez-Méndez, Marcela Meneses-Guzmán, Bruno Chinè-Polito, Roberto Pereira-Arroyo   +3 more
doaj   +1 more source

Early diagnosis is vital in the management of squamous cell carcinomas associated with chronic non healing ulcers: a case series and review of the literature

International Wound Journal, Volume 1, Issue 3, Page 182-184, September 2004., 2004
Le diagnostic précoce est vital dans le management des carcinomes spinocellulaires associés à des ulcers chroniques: série clinique et revue de la literature Introduction: l’association entre plaie chronique et carcinome spino‐cellulaire est bien établie.
wiley   +1 more source