Results 11 to 20 of about 8,910,109 (261)

Herbivore preference for native vs. exotic plants: generalist herbivores from multiple continents prefer exotic plants that are evolutionarily naïve. [PDF]

open access: yesPLoS ONE, 2011
Enemy release and biotic resistance are competing, but not mutually exclusive, hypotheses addressing the success or failure of non-native plants entering a new region. Enemy release predicts that exotic plants become invasive by escaping their co-adapted
Wendy E Morrison, Mark E Hay
doaj   +1 more source

Spinning hexagons

open access: yesJournal of High Energy Physics, 2022
We reduce the computation of three point function of three spinning operators with arbitrary polarizations in 𝒩 = 4 SYM to a statistical mechanics problem via the hexagon formalism. The central building block of these correlation functions is the hexagon
Carlos Bercini   +3 more
doaj   +1 more source

Disproportionate extinction of South American mammals drove the asymmetry of the Great American Biotic Interchange

open access: yesProceedings of the National Academy of Sciences of the United States of America, 2020
Significance The biological interchange between North and South America associated with the formation of the Isthmus of Panama is key to defining current gradients of species diversity. A major gap in our understanding of the interchange is its asymmetry,
J. D. Carrillo   +6 more
semanticscholar   +1 more source

Injury epidemiology in professional football in South America compared with Europe

open access: yesBMJ Open Sport & Exercise Medicine, 2021
Objective To describe the injury epidemiology in professional football in South America and compare it with European professional football.Methods Data about football exposures and injury occurrences were registered in Six teams participating in Copa ...
Jan Ekstrand   +2 more
doaj   +1 more source

Dual S-matrix bootstrap. Part I. 2D theory

open access: yesJournal of High Energy Physics, 2020
Using duality in optimization theory we formulate a dual approach to the S-matrix bootstrap that provides rigorous bounds to 2D QFT observables as a consequence of unitarity, crossing symmetry and analyticity of the scattering matrix. We then explain how
Andrea L. Guerrieri   +2 more
doaj   +1 more source

Anemia em crianças indígenas da etnia Karapotó Anemia in indigenous children of Karapotó ethnic backgrounds

open access: yesRevista Brasileira de Saúde Materno Infantil, 2012
OBJETIVOS: identificar a prevalência e fatores associados à anemia em crianças indígenas Karapotó. MÉTODOS: estudo transversal em que foi realizada dosagem de hemoglobina com fotômetro portátil Hemocue, coletadas medidas de peso e estatura e dados ...
Janaína Ferro Pereira   +2 more
doaj   +1 more source

Macroeconomic, demographic and human developmental correlates of physical activity and sitting time among South American adults

open access: yesInternational Journal of Behavioral Nutrition and Physical Activity, 2020
Background Our aim was to investigate the association of macroeconomic, human development, and demographic factors with different domains of physical activity and sitting time among South American adults.
A. Werneck   +9 more
semanticscholar   +1 more source

Gallbladder cancer: South American experience [PDF]

open access: yes, 2016
Large differences in terms of incidence and mortality due to gallbladder cancer (GBC) have been reported worldwide. Moreover, it seems that GBC has unique characteristics in South America.
Arroyo, Gerardo F.   +2 more
core   +1 more source

Miocene orographic uplift forces rapid hydrological change in the southern central Andes [PDF]

open access: yes, 2016
Rainfall in the central Andes associated with the South American Monsoon and the South American Low-Level Jet results from orographic effects on atmospheric circulation exerted by the Andean Plateau and the Eastern Cordillera.
Alonso, Ricardo Narciso   +6 more
core   +1 more source

Morphometric analyses and new taxonomic circumscription of South American species of Flourensia (Asteraceae, Heliantheae, Enceliinae) [PDF]

open access: yes, 2018
Flourensia (Asteraceae, Heliantheae, Enceliinae) is an amphitropical genus of resinous subshrubs, shrubs and small trees with 13 North American and 20 South American species among which disagreement on the species limits of some members still exists.
Aagesen, Lone   +3 more
core   +1 more source

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