Results 61 to 70 of about 4,826,497 (302)

High-performance quasi-2D perovskite light-emitting diodes: from materials to devices

open access: yesLight: Science & Applications, 2021
Quasi-two-dimensional (quasi-2D) perovskites have attracted extraordinary attention due to their superior semiconducting properties and have emerged as one of the most promising materials for next-generation light-emitting diodes (LEDs).
Li Zhang   +6 more
doaj   +1 more source

Hydrological changes regulate fish metacommunity structures and β-diversity patterns in the floodplain lake, China

open access: yesEcological Indicators, 2023
The metacommunity structures are continuously dynamic, and understanding the temporal species distribution patterns and biodiversity variations will elucidate the metacommunity theory. To examine whether the idealized metacommunity structuring, diversity
Yang Liu   +6 more
doaj   +1 more source

Simian immunodeficiency virus infection in wild-caught chimpanzees from Cameroon [PDF]

open access: yes, 2005
Simian immunodeficiency viruses (SIVcpz) infecting chimpanzees (Pan troglodytes) in west central Africa are the closest relatives to all major variants of human immunodeficiency virus type 1 ([HIV-1]; groups M, N and O), and have thus been implicated as ...
Ayouba, A   +12 more
core   +2 more sources

Living Collections of Threatened Plants in Botanic Gardens: When Is Ex Situ Cultivation Less Appropriate than Quasi In Situ Cultivation?

open access: yesJournal of Zoological and Botanical Gardens, 2023
Botanic gardens play an increasingly important role in the conservation of global biodiversity. However, although botanical gardens periodically report the results of introducing certain species of native flora, they rarely attempt to summarize existing ...
Sergei Volis
doaj   +1 more source

An evolutionary model for simple ecosystems

open access: yes, 1999
In this review some simple models of asexual populations evolving on smooth landscapes are studied. The basic model is based on a cellular automaton, which is analyzed here in the spatial mean-field limit.
Bagnoli, Franco, Bezzi, Michele
core   +2 more sources

Competition between recombination and epistasis can cause a transition from allele to genotype selection [PDF]

open access: yes, 2009
Biochemical and regulatory interactions central to biological networks are expected to cause extensive genetic interactions or epistasis affecting the heritability of complex traits and the distribution of genotypes in populations. However, the inference
Neher, Richard A., Shraiman, Boris I.
core   +3 more sources

A criterion based on computational singular perturbation for the construction of reduced mechanism for dimethyl ether oxidation [PDF]

open access: yesJournal of the Serbian Chemical Society, 2013
A criterion based on the computational singular perturbation (CSP) method is proposed in order to determine the number of quasi-steady state (QSS) species.
Wu Zuozhu, Qiao Xinqi, Huang Zhen
doaj   +1 more source

Seabird meta-Population Viability Model (mPVA) methods

open access: yesMethodsX, 2022
The seabird meta-population viability model (mPVA) uses a generalized approach to project abundance and quasi-extinction risk for 102 seabird species under various conservation scenarios.
M. Tim Tinker   +4 more
doaj   +1 more source

Adaptive evolution on neutral networks [PDF]

open access: yes, 2001
We study the evolution of large but finite asexual populations evolving in fitness landscapes in which all mutations are either neutral or strongly deleterious.
Wilke, Claus O.
core   +3 more sources

Modeling viral coevolution: HIV multi-clonal persistence and competition dynamics [PDF]

open access: yes, 2005
The coexistence of different viral strains (quasispecies) within the same host are nowadays observed for a growing number of viruses, most notably HIV, Marburg and Ebola, but the conditions for the formation and survival of new strains have not yet been ...
Altfeld   +43 more
core   +2 more sources

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