Meine Merkliste
my.bionity.com  
Login  

808 Aktuelle Fachpublikationen von Proceedings of the National Academy of Sciences

rss
mit folgenden Suchkriterien:

Horizontal transfer beyond genes [Microbiology]

11.11.2014 | Eugene V. Koonin, Proceedings of the National Academy of Sciences current issue, 2014

Horizontal gene transfer (HGT) is a major process in the evolution of bacteria and archaea (1–3) that is thought to be the principal source of functional innovation in microbial evolution (4, 5). The signal of vertical, tree-like evolution is detectable primarily among genes encoding components ...

mehr

Timing and heterogeneity of mutations associated with drug resistance in metastatic cancers [Applied Mathematics]

11.11.2014 | Ivana Bozic; Martin A. Nowak, Proceedings of the National Academy of Sciences current issue, 2014

Targeted therapies provide an exciting new approach to combat human cancer. The immediate effect is a dramatic reduction in disease burden, but in most cases, the tumor returns as a consequence of resistance. Various mechanisms for the evolution of resistance have been implicated, including ...

mehr

Remodeling in bone without osteocytes: Billfish challenge bone structure-function paradigms [Evolution]

11.11.2014 | Ayelet Atkins; Mason N. Dean; Maria Laura Habegger; Phillip J. Motta; Lior Ofer; Felix Repp; Anna Shipov; Steve Wein ..., Proceedings of the National Academy of Sciences current issue, 2014

A remarkable property of tetrapod bone is its ability to detect and remodel areas where damage has accumulated through prolonged use. This process, believed vital to the long-term health of bone, is considered to be initiated and orchestrated by osteocytes, cells within the bone matrix. It is ...

mehr

Form of an evolutionary tradeoff affects eco-evolutionary dynamics in a predator-prey system [Ecology]

11.11.2014 | Minoru Kasada; Masato Yamamichi; Takehito Yoshida, Proceedings of the National Academy of Sciences current issue, 2014

Evolution on a time scale similar to ecological dynamics has been increasingly recognized for the last three decades. Selection mediated by ecological interactions can change heritable phenotypic variation (i.e., evolution), and evolution of traits, in turn, can affect ecological interactions. ...

mehr

Not surprisingly, no inheritance of a trait results in no evolution [Biological Sciences]

11.11.2014 | Philip W. Hedrick; David W. Coltman; Marco Festa-Bianchet; Fanie Pelletier, Proceedings of the National Academy of Sciences current issue, 2014

Traill et al. (1) conclude that the “decline in body mass of the bighorn population is largely attributable to demographic change and environmental factors” and “expect our conclusions to hold for horn length too.” Three of us (D.W.C., M.F.-B., and F.P.) provided data from the Ram Mountain ...

mehr

Phylotranscriptomic analysis of the origin and early diversification of land plants [Evolution]

11.11.2014 | Norman J. Wickett; Siavash Mirarab; Nam Nguyen; Tandy Warnow; Eric Carpenter; Naim Matasci; Saravanaraj Ayyampalayam ..., Proceedings of the National Academy of Sciences current issue, 2014

Reconstructing the origin and evolution of land plants and their algal relatives is a fundamental problem in plant phylogenetics, and is essential for understanding how critical adaptations arose, including the embryo, vascular tissue, seeds, and flowers. Despite advances in molecular ...

mehr

Algorithms, complexity, and the sciences [Evolution]

11.11.2014 | Christos Papadimitriou, Proceedings of the National Academy of Sciences current issue, 2014

Algorithms, perhaps together with Moore’s law, compose the engine of the information technology revolution, whereas complexity—the antithesis of algorithms—is one of the deepest realms of mathematical investigation. After introducing the basic concepts of algorithms and complexity, and the ...

mehr

Predictable transcriptome evolution in the convergent and complex bioluminescent organs of squid [Evolution]

04.11.2014 | M. Sabrina Pankey; Vladimir N. Minin; Greg C. Imholte; Marc A. Suchard; Todd H. Oakley, Proceedings of the National Academy of Sciences current issue, 2014

Despite contingency in life’s history, the similarity of evolutionarily convergent traits may represent predictable solutions to common conditions. However, the extent to which overall gene expression levels (transcriptomes) underlying convergent traits are themselves convergent remains largely ...

mehr

Discovery of fossil lamprey larva from the Lower Cretaceous reveals its three-phased life cycle [Evolution]

28.10.2014 | Mee-mann Chang; Feixiang Wu; Desui Miao; Jiangyong Zhang, Proceedings of the National Academy of Sciences current issue, 2014

Lampreys are one of the two surviving jawless vertebrate groups and one of a few vertebrate groups with the best exemplified metamorphosis during their life cycle, which consists of a long-lasting larval stage, a peculiar metamorphosis, and a relatively short adulthood with a markedly different ...

mehr

Evolution of a morphological novelty occurred before genome compaction in a lineage of extreme parasites [Evolution]

28.10.2014 | Karen L. Haag; Timothy Y. James; Jean-François Pombert; Ronny Larsson; Tobias M. M. Schaer; Dominik Refardt; Dieter ..., Proceedings of the National Academy of Sciences current issue, 2014

Intracellular parasitism results in extreme adaptations, whose evolutionary history is difficult to understand, because the parasites and their known free-living relatives are so divergent from one another. Microsporidia are intracellular parasites of humans and other animals, which evolved ...

mehr

Seite 1 von 81
Suche per e-Mail abonnieren

Sie erhalten passend zu Ihrer Suche die neusten Suchergebnisse per E-Mail. Dieser Service ist für Sie kostenlos und kann jederzeit abbestellt werden.

Ihr Bowser ist nicht aktuell. Microsoft Internet Explorer 6.0 unterstützt einige Funktionen auf Chemie.DE nicht.