Results 91 to 100 of about 85,764 (284)

Admixture-enabled selection for rapid adaptive evolution in the Americas

Genome Biology, 2020
Background Admixture occurs when previously isolated populations come together and exchange genetic material. We hypothesize that admixture can enable rapid adaptive evolution in human populations by introducing novel genetic variants (haplotypes) at ...
Emily T. Norris, Lavanya Rishishwar, Aroon T. Chande, Andrew B. Conley, Kaixiong Ye, Augusto Valderrama-Aguirre, I. King Jordan   +6 more
doaj   +1 more source

Elucidating the phylodynamics of endemic rabies virus in eastern Africa using whole-genome sequencing [PDF]

, 2015
Many of the pathogens perceived to pose the greatest risk to humans are viral zoonoses, responsible for a range of emerging and endemic infectious diseases.
Biek, Roman, Brunker, Kirstyn, Cleaveland, Sarah, Fooks, AR, Hampson, Katie, Horton, Daniel L, Kazwala, Rudovick, Lembo, Tiziana, Marston, Denise A, Mtema, Zacharia J, Ngeleja, Chanasa, Sambo, Maganga, Sikana, Lwitiko, Wilkie, Gavin   +13 more
core   +1 more source

EBSD Study of Creep‐Induced Lattice Misorientation in MgO‐Particle‐Reinforced Austenitic Steel Composites

Advanced Engineering Materials, EarlyView.
Creep experiments at 900°C on coarse‐grained steel‐ceramic composites containing recycled magnesia reveal that higher ceramic volume fractions significantly enhance the creep resistance. Detailed EBSD investigations identify subgrain formation in the steel matrix as the dominant deformation mechanism.
Moritz Müller, Amaya Compart, Mahnaz Mehdizadehlima, Serhii Yaroshevskyi, Christos G. Aneziris, Horst Biermann, Anja Weidner   +6 more
wiley   +1 more source

Influence of an Argon/Silane Atmosphere on the Temperature of a Thermal Plasma

Advanced Engineering Materials, EarlyView.
The influence of a silane‐doped argon atmosphere on the chemical composition and temperature of a thermal nontransferring argon plasma is investigated using optical emission spectroscopy. As a result of the high amount of free electrons resulting from the stepwise ionization and dissociation of the silane molecule, even a silane addition of 0.01 vol ...
Lena Kreie, David Kramer, Thomas Scheithauer, Hans Jürgen Maier, Thomas Hassel   +4 more
wiley   +1 more source

Human Population Admixture in Asia [PDF]

Genomics & Informatics, 2012
Genetic admixture in human, the result of inter-marriage among people from different well-differentiated populations, has been extensively studied in the New World, where European colonization brought contact between peoples of Europe, Africa, and Asia ...
Shuhua Xu
doaj   +1 more source

Massive migration from the steppe is a source for Indo-European languages in Europe

, 2015
We generated genome-wide data from 69 Europeans who lived between 8,000-3,000 years ago by enriching ancient DNA libraries for a target set of almost four hundred thousand polymorphisms. Enrichment of these positions decreases the sequencing required for
A Keller, A Seguin-Orlando, Alan Cooper, Aleksandr Khokhlov, Alissa Mittnik, Anna Szécsényi-Nagy, AW Briggs, AW Briggs, Bastien Llamas, C Der Sarkissian, C Gamba, C Renfrew, Christina Roth, Christos Economou, D Reich, David Anthony, David Reich, DH Alexander, DH Alexander, DM Behar, Dorcas Brown, DW Anthony, Eadaoin Harney, Eszter Bánffy, Fredrik Hallgren, G Brandt, G Hellenthal, Guido Brandt, H Li, Harald Meller, I Lazaridis, I Olalde, Iosif Lazaridis, J Czebreszuk, Joachim Wahl, Johannes Krause, JP Mallory, Kristin Stewardson, Kurt Werner Alt, M Kircher, M Lipson, M Meyer, M Raghavan, Manuel A. Rojo Guerra, Matthias Meyer, Michael Francken, Michael Kunst, N Patterson, N Rohland, N Rohland, N Rohland, Nadin Rohland, Nick Patterson, Nicole Nicklisch, NM Myres, Oleg Mochalov, P Bellwood, P Ralph, P Skoglund, P Skoglund, P Skoglund, PA Underhill, Pavel Kuznetsov, Q Fu, Q Fu, Q Fu, Qiaomei Fu, Rafael Garrido Pena, RE Green, Roberto Risch, S Purcell, S Sawyer, Sandra L. Pichler, Susanne Friederich, Susanne Nordenfelt, Swapan Mallick, T Lassmann, TV Gamkrelidze, Valery Khartanovich, Vayacheslav Moiseyev, W Haak, Wolfgang Haak   +81 more
core   +2 more sources

Molecular footprints of the Holocene retreat of dwarf birch in Britain [PDF]

, 2014
© 2014 The Authors. Molecular Ecology Published by John Wiley & Sons Ltd. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original ...
Atkinson MD, Avise JC, Brown IR, Brown IR, Furrer R, Hammer Ø, Huntley B, Linnaeus C, Mellersh C, Phillips SJ, Pritchard JK, R Core Team, Rich TCG, Stace CA, Stebbins GL   +14 more
core   +1 more source

Admixture facilitates genetic adaptations to high altitude in Tibet [PDF]

Nature Communications, 2014
Admixture is recognized as a widespread feature of human populations, renewing interest in the possibility that genetic exchange can facilitate adaptations to new environments. Studies of Tibetans revealed candidates for high-altitude adaptations in the EGLN1 and EPAS1 genes, associated with lower haemoglobin concentration.
Choongwon, Jeong, Gorka, Alkorta-Aranburu, Buddha, Basnyat, Maniraj, Neupane, David B, Witonsky, Jonathan K, Pritchard, Cynthia M, Beall, Anna, Di Rienzo   +7 more
openaire   +2 more sources

Enhancing Strength and Electrical Conductivity in Al–Zr–Sc Conductor Alloys Through Sn and Sr Microalloying and Two‐Step Aging Treatment

Advanced Engineering Materials, EarlyView.
Trace additions of Sn and Sr combined with a two‐step aging treatment are shown to enhance the microstructure and performance of Al–Zr–Sc conductor alloys. Strength and electrical conductivity increase concurrently through accelerated precipitation of fine Al3(Sc, Zr) precipitates and improved dislocation resistance, offering a cost‐effective pathway ...
Quan Shao, Emad M. Elgallad, Alexandre Maltais, X.‐Grant Chen   +3 more
wiley   +1 more source

Genetic integrity of the Dark European honey bee (Apis mellifera mellifera) from protected populations: a genome-wide assessment using SNPs and mtDNA sequence data [PDF]

, 2014
The recognition that the Dark European honey bee, Apis mellifera mellifera, is increasingly threatened in its native range has led to the establishment of conservation programmes and protected areas throughout western Europe.
Carreck, Norman L, Chavez-Galarza, Julio, Dahle, Bjorn, Dall' Olio, Raffaele, de la Rua, Pilar, Garnery, Lionel, Henriques, Dora, Johnson, J Spencer, Kryger, Per, Pinto, M Alice, Soland-Reckeweg, Gabriele, van der Zee, Romee   +11 more
core   +1 more source