Results 61 to 70 of about 218,461 (283)

Long-distance dispersal of plant macrofossils [PDF]

New Zealand Journal of Botany, 1980
Abstract Evidence is presented for the long-distance transport of leaves or other plant fragments by streams and/or by flotation on lakes and/or by wind. Under some circumstances macroscopic floras could be transported over considerable distances before being deposited and fossilised.
openaire   +1 more source

A methionine‐lined active site governs carbocation stabilization and product specificity in a bacterial terpene synthase

FEBS Letters, EarlyView.
This study reveals a unique active site enriched in methionine residues and demonstrates that these residues play a critical role by stabilizing carbocation intermediates through novel sulfur–cation interactions. Structure‐guided mutagenesis further revealed variants with significantly altered product profiles, enhancing pseudopterosin formation. These
Marion Ringel, Carl P. O. Helmer, Shani Zev, Ronja Driller, Emily Buhr, Markus Reinbold, Renana Schwartz, Gabriel Foley, Mikael Boden, Daniel Garbe, Gerhard Schenk, Dan Thomas Major, Bernhard Loll, Thomas Brück   +13 more
wiley   +1 more source

Estimation of the stratified dispersal rate [PDF]

, 2011
The establishment and spread of invading organisms have dramatic consequences for ecosystems. Many organisms expand their range by being transferred passively over short and long distances simultaneously, thus resulting in a stratified dispersal process.
B.I. Camara, N. Sapoukhina
core   +1 more source

Long-term consistency of spatial patterns of primate seed dispersal [PDF]

, 2017
Seed dispersal is a key ecological process in tropical forests, with effects on various levels ranging from plant reproductive success to the carbon storage potential of tropical rainforests.
Bello, Bialozyt, Culot, Dirzo, Effiom, Fa, Gentry, Hampe, Heymann, Heymann, Heymann, Houle, Julliot, Kie, Knogge, Knogge, Levin, Levine, McConkey, McConkey, McConkey, Muñoz Lazo, Nathan, Nathan, Nathan, Nathan, Nuñez-Iturri, Oliveira, Osuri, Peres, Peres, Peres, Peres, Peres, Peres, Pérez-Méndez, R Core Team, Roosmalen, Schupp, Signer, Stevenson, Stevenson, Terborgh, Wand, Worton   +44 more
core   +2 more sources

Linking neurogenesis, oligodendrogenesis, and myelination defects to neurodevelopmental disruption in primary mitochondrial disorders

FEBS Letters, EarlyView.
Mitochondrial remodeling shapes neural and glial lineage progression by matching metabolic supply with demand. Elevated OXPHOS supports differentiation and myelin formation, while myelin compaction lowers mitochondrial dependence, revealing mitochondria as key drivers of developmental energy adaptation.
Sahitya Ranjan Biswas, Porter L. Tomsick, Alicia M. Pickrell, Paul D. Morton   +3 more
wiley   +1 more source

Long-distance Dispersal Patterns of Male Cerulean Warblers (Dendroica cerulea) Measured by Stable-hydrogen Isotopes

Avian Conservation and Ecology, 2007
Despite the fundamental role played by long-distance dispersal in population dynamics, the mechanisms promoting or inhibiting dispersal by migratory songbirds are poorly understood.
M. Katherine. Girvan, Jason Jones, D. Ryan. Norris, Jennifer J. Barg, T. Kurt. Kyser, Raleigh J. Robertson   +5 more
doaj   +1 more source

Peroxidasin enables melanoma immune escape by inhibiting natural killer cell cytotoxicity

Molecular Oncology, EarlyView.
Peroxidasin (PXDN) is secreted by melanoma cells and binds the NK cell receptor NKG2D, thereby suppressing NK cell activation and cytotoxicity. PXDN depletion restores NKG2D signaling and enables effective NK cell–mediated melanoma killing. These findings identify PXDN as a previously unrecognized immune evasion factor and a potential target to improve
Hsu‐Min Sung, David Bickel, Lena C. M. Krause, Daria Ezeriņa, Christian Ickes, Julian Wojtachnia, Christine S. Gibhardt, Magdalena Shumanska, Khadija Wahni, Andrea Paluschkiwitz, Julia Malo Pueyo, Ekaterina Baranova, Wim Vranken, Hedwig Stanisz, Ioana Stejerean‐Todoran, Michael P. Schön, Joris Messens, Ivan Bogeski   +17 more
wiley   +1 more source

Mixing of propagules from discrete sources at long distance: comparing a dispersal tail to an exponential

BMC Ecology, 2006
Background Rare long distance dispersal events impact the demography and the genetic structure of populations. When dispersal is modelled via a dispersal kernel, one possible characterisation of long-distance dispersal is given by the shape of the tail ...
Gouyon Pierre-Henri, Lavigne Claire, Klein Etienne K   +2 more
doaj   +1 more source

Colorectal cancer‐derived FGF19 is a metabolically active serum biomarker that exerts enteroendocrine effects on mouse liver

Molecular Oncology, EarlyView.
Meta‐transcriptome analysis identified FGF19 as a peptide enteroendocrine hormone associated with colorectal cancer prognosis. In vivo xenograft models showed release of FGF19 into the blood at levels that correlated with tumor volumes. Tumoral‐FGF19 altered murine liver metabolism through FGFR4, thereby reducing bile acid synthesis and increasing ...
Jordan M. Beardsley, Michael W. Rohr, Joseph A. Goode, Sai Preethi Nakkina, Jignesh G. Parikh, Deborah A. Altomare   +5 more
wiley   +1 more source

Population genetics strategies to characterize long-distance dispersal of insects [PDF]

, 2013
Population genetics strategies offer an alternative and powerful approach for obtaining information about long-distance movement, and have been widely used for examining patterns and magnitude of insect dispersal over geographic and temporal scales. Such
Kim, Kyung, Sappington, Thomas, Sappington, Thomas   +2 more
core   +3 more sources