Results 11 to 20 of about 115,762 (261)

Adaptive radiation therapy [PDF]

open access: yesPhysics in Medicine and Biology, 1997
Adaptive radiation therapy is a closed-loop radiation treatment process where the treatment plan can be modified using a systematic feedback of measurements. Adaptive radiation therapy intends to improve radiation treatment by systematically monitoring treatment variations and incorporating them to re-optimize the treatment plan early on during the ...
D, Yan, F, Vicini, J, Wong, A, Martinez
openaire   +4 more sources

Pangenomes as a framework for adaptive radiation, speciation, and adaptation. [PDF]

open access: yesAm J Bot
Abstract Understanding the genomic basis of diversification is a central goal in evolutionary biology. In recent years, the development and use of pangenomes, a genomic representation of multiple individuals within a lineage (a set of related populations, subspecies, ecotypes, or species), has enabled researchers to differentiate ...
Tellini N   +5 more
europepmc   +3 more sources

Compensatory adaptation and diversification subsequent to evolutionary rescue in a model adaptive radiation

open access: yesEcology and Evolution, 2021
Biological populations may survive lethal environmental stress through evolutionary rescue. The rescued populations typically suffer a reduction in growth performance and harbor very low genetic diversity compared with their parental populations.
Dong‐Hao Zhou, Quan‐Guo Zhang
doaj   +1 more source

Deep-Time Demographic Inference Suggests Ecological Release as Driver of Neoavian Adaptive Radiation

open access: yesDiversity, 2020
Assessing the applicability of theory to major adaptive radiations in deep time represents an extremely difficult problem in evolutionary biology.
Peter Houde   +2 more
doaj   +1 more source

Dendrite fragmentation induced by massive-like δ–γ transformation in Fe–C alloys

open access: yesNature Communications, 2019
Transitioning from columnar to equiaxed grains is paramount for desired microstructures during steel casting. Here, the authors report a new fragmentation mechanism based on a phase transition at grain boundaries that can contribute to equiaxed grains.
Hideyuki Yasuda   +7 more
doaj   +1 more source

The Role of Photobionts as Drivers of Diversification in an Island Radiation of Lichen-Forming Fungi

open access: yesFrontiers in Microbiology, 2022
Speciation in oceanic islands has attracted the interest of scientists since the 19th century. One of the most striking evolutionary phenomena that can be studied in islands is adaptive radiation, that is, when a lineage gives rise to different species ...
Miguel Blázquez   +8 more
doaj   +1 more source

Molecular Adaptation during a Rapid Adaptive Radiation [PDF]

open access: yesMolecular Biology and Evolution, 2013
"Explosive" adaptive radiations on islands remain one of the most puzzling evolutionary phenomena and the evolutionary genetic processes behind such radiations remain unclear. Rapid morphological and ecological evolution during island radiations suggests that many genes may be under fairly strong selection, although this remains untested.
Kapralov, Maxim   +2 more
openaire   +3 more sources

The Integrated Genomic Architecture and Evolution of Dental Divergence in East African Cichlid Fishes (Haplochromis chilotes x H. nyererei)

open access: yesG3: Genes, Genomes, Genetics, 2017
The independent evolution of the two toothed jaws of cichlid fishes is thought to have promoted their unparalleled ecological divergence and species richness.
C. Darrin Hulsey   +5 more
doaj   +1 more source

Reed bamboos drive skull shape evolution in bush frogs of the Western Ghats, Peninsular India

open access: yesEcology and Evolution, 2023
Reed bamboo is a major ecological and economic resource for many animals, including humans. Nonetheless, the influence of this plant's evolutionary role on the morphology of animal species remains unexplored.
Kalpana Das   +5 more
doaj   +1 more source

Polygenic adaptation from standing genetic variation allows rapid ecotype formation

open access: yeseLife, 2023
Adaptive ecotype formation can be the first step to speciation, but the genetic underpinnings of this process are poorly understood. Marine midges of the genus Clunio (Diptera) have recolonized Northern European shore areas after the last glaciation.
Nico Fuhrmann   +2 more
doaj   +1 more source

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