Results 31 to 40 of about 225,307 (327)

Searching for learning-dependent changes in the antennal lobe: simultaneous recording of neural activity and aversive olfactory learning in honeybees

open access: yesFrontiers in Behavioral Neuroscience, 2010
Plasticity in the honeybee brain has been studied using the appetitive olfactory conditioning of the proboscis extension reflex, in which a bee learns the association between an odor and a sucrose reward.
Edith Roussel   +6 more
doaj   +1 more source

Multilocus phylogeography and ecological niche modeling suggest speciation with gene flow between the two Bamboo Partridges

open access: yesAvian Research, 2021
Background Understanding how species diversify is a long-standing question in biology. The allopatric speciation model is a classic hypothesis to explain the speciation process. This model supposes that there is no gene flow during the divergence process
Pengcheng Wang   +8 more
doaj   +1 more source

Simultaneous Determination of U-Pb Age and Trace Elements of Zircon by Laser Ablation Sector Field Inductively Coupled Plasma-Mass Spectrometry

open access: yesYankuang ceshi
Laser ablation sector field inductively coupled plasma-mass spectrometry (LA-SF-ICP-MS) is widely applied in U-Pb dating of zircon due to its remarkable sensitivity.
Linghao ZHAO   +5 more
doaj   +1 more source

Perfect association between spatial swarm segregation and the X-chromosome speciation island in hybridizing Anopheles coluzzii and Anopheles gambiae populations

open access: yesScientific Reports, 2022
The sibling species An. coluzzii and An. gambiae s.s. are major malaria vectors thought to be undergoing sympatric speciation with gene flow. In the absence of intrinsic post-zygotic isolation between the two taxa, speciation is thought possible through ...
Abdoulaye Niang   +8 more
doaj   +1 more source

Chromosome Evolution of the Liolaemus monticola (Liolaemidae) Complex: Chromosomal and Molecular Aspects

open access: yesAnimals, 2022
Chromosomal rearrangements can directly influence population differentiation and speciation. The Liolaemus monticola complex in Chile is a unique model consisting of several chromosome races arranged in a latitudinal sequence of increasing karyotype ...
Madeleine Lamborot   +4 more
doaj   +1 more source

Mate Choice Drives Evolutionary Stability in a Hybrid Complex. [PDF]

open access: yesPLoS ONE, 2015
Previous studies have shown that assortative mating acts as a driver of speciation by countering hybridization between two populations of the same species (pre-zygotic isolation) or through mate choice among the hybrids (hybrid speciation).
Miguel Morgado-Santos   +3 more
doaj   +1 more source

Determination of Selenomethionine, Selenocystine, and Methylselenocysteine in Egg Sample by High Performance Liquid Chromatography—Inductively Coupled Plasma Mass Spectrometry

open access: yesSeparations, 2022
The deficiency of selenium in dietary is recognized as a global problem. Eggs, as one of the most widely consumed food products, were readily enriched with selenium and became an important intake source of selenium for humans.
Yue Zhao   +4 more
doaj   +1 more source

SPECIATION AND MACROEVOLUTION [PDF]

open access: yesEvolution, 1982
Species and higher taxa represent, phenomenologically, two very different levels in the hierarchical organization of the living world. Ever since there has been a concept of evolution, there has been the problem how one can get from the species level to that of the higher categories.
openaire   +2 more sources

Unravelling the Extent of Diversity within the Iberian Medicinal Leeches (Hirudinea: Hirudo) Using Molecules and Morphology

open access: yesBiology, 2021
Until the beginning of the 21st century, the famous medicinal leech was thought to be represented by only one species, Hirudo medicinalis. However, recent publications have demonstrated that under that name, at least five different species of medicinal ...
Andrés Arias   +5 more
doaj   +1 more source

Zinc Oxide Nanoparticles Catalyzed Condensation Reaction of Isocoumarins and 1,7-Heptadiamine in the Formation of Bis-Isoquinolinones

open access: yesThe Scientific World Journal, 2012
The diversified bis-isoquinolinones were obtained in two steps, utilizing homophthalic acid and various acid chlorides providing 3-substituted isocoumarins in the first step which on further condensation with 1,7-heptadiamine involving C–N bond formation
Varadhan Krishnakumar   +3 more
doaj   +1 more source

Home - About - Disclaimer - Privacy