Results 31 to 40 of about 10,682,507 (345)

Genomic architecture of adaptive radiation and hybridization in Alpine whitefish

open access: yesNature Communications, 2022
In this genomic study on Alpine whitefish radiations, the authors reveal details on the genetic architecture underlying the repeated eco-morphological diversification and the role of hybridization in the evolution of endemic whitefish species.
Rishi De-Kayne   +5 more
doaj   +1 more source

On the evolution of random graphs

open access: yes, 1984
(n) k edges have equal probabilities to be chosen as the next one . We shall 2 study the "evolution" of such a random graph if N is increased . In this investigation we endeavour to find what is the "typical" structure at a given stage of evolution (i ...
P. Erdos, A. Rényi
semanticscholar   +1 more source

Hand hygiene improvement or antibiotic restriction to control the household transmission of extended-spectrum β-lactamase-producing Escherichia coli: a mathematical modelling study

open access: yesAntimicrobial Resistance and Infection Control, 2020
Background The best strategy to control ESBL-producing Escherichia coli (ESBL-EC) spread in the community is lacking. Methods We developed an individual-based transmission model to evaluate the impact of hand hygiene (HH) improvement and reduction in ...
Lidia Kardaś-Słoma   +6 more
doaj   +1 more source

Chemical Evolution in VeLLOs [PDF]

open access: yes, 2007
A new type of object called "Very Low Luminosity Objects (VeLLOs)" has been discovered by the Spitzer Space Telescope. VeLLOs might be substellar objects forming by accretion.
Lee, Jeong-Eun
core   +2 more sources

Microscopic Malaria Infection and Its Determinants in Urban and Rural Populations Living in South-East Gabon

open access: yesJournal of Parasitology Research
A better understanding of malaria epidemiology in both asymptomatic and symptomatic individuals is essential for developing strategies to control the disease.
Jean-Claude Biteghe-Bi-Essone   +7 more
doaj   +1 more source

Divergent expression of aristaless1 and aristaless2 during embryonic appendage and pupal wing development in butterflies

open access: yesBMC Biology, 2023
Background Gene duplication events are critical for the evolution of new gene functions. Aristaless is a major regulator of distinct developmental processes. It is most known for its role during appendage development across animals.
Erick X. Bayala   +4 more
doaj   +1 more source

The unpredictably eruptive dynamics of spruce budworm populations in eastern Canada

open access: yesPopulation Ecology, EarlyView.
We examine historical population data for spruce budworm from several locations through the period 1930–1997, and use density‐dependent recruitment curves to test whether the pattern of population growth over time is more consistent with Royama's (1984; Ecological Monographs 54:429–462) linear R(t) model of harmonic oscillation at Green River New ...
Barry J. Cooke, Jacques Régnière
wiley   +1 more source

Deconstructing the geography of human impacts on species’ natural distribution

open access: yesNature Communications
It remains unknown how species’ populations across their geographic range are constrained by multiple coincident natural and anthropogenic environmental gradients.
Conor Waldock   +6 more
doaj   +1 more source

Reaction-diffusion in a growing 3D domain of skin scales generates a discrete cellular automaton

open access: yesNature Communications, 2021
The adult ocellated lizard skin colour pattern is effectively generated by a stochastic cellular automaton (CA) of skin scales. Here authors use reaction diffusion (RD) numerical simulations in 3D on realistic lizard skin geometries and demonstrate that ...
Anamarija Fofonjka   +1 more
doaj   +1 more source

Evolution: functional evolution of nuclear structure. [PDF]

open access: yes, 2011
The evolution of the nucleus, the defining feature of eukaryotic cells, was long shrouded in speculation and mystery. There is now strong evidence that nuclear pore complexes (NPCs) and nuclear membranes coevolved with the endomembrane system, and that ...
Dawson, Scott C, Wilson, Katherine L
core  

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