نتایج جستجو برای: migration patterns

تعداد نتایج: 544541  

2008
Eric Sebzda Zhiying Zou John S Lee Tao Wang Mark L Kahn

The migration patterns of naive and activated T cells are associated with the expression of distinct sets of chemokine receptors, but the molecular basis for this regulation is unknown. Here we identify Krupple-like factor 2 (KLF2) as a key transcriptional factor needed to prevent naive T cells from expressing inflammatory chemokine receptors and acquiring the migration patterns of activated T ...

2015
N. V. Krakhmal M. V. Zavyalova E. V. Denisov S. V. Vtorushin V. M. Perelmuter

Cancer invasion and the ability of malignant tumor cells for directed migration and metastasis have remained a focus of research for many years. Numerous studies have confirmed the existence of two main patterns of cancer cell invasion: collective cell migration and individual cell migration, by which tumor cells overcome barriers of the extracellular matrix and spread into surrounding tissues....

2014
Ryan Daly Malcolm J. Smale Paul D. Cowley Pierre W. Froneman David Hyrenbach

Bull sharks (Carcharhinus leucas) are globally distributed top predators that play an important ecological role within coastal marine communities. However, little is known about the spatial and temporal scales of their habitat use and associated ecological role. In this study, we employed passive acoustic telemetry to investigate the residency patterns and migration dynamics of 18 adult bull sh...

2003
Johanna P. Pierre Hiroyoshi Higuchi

Using satellite tracking, we have followed the movements of large wetland birds in Asia for more than 10 years. We have investigated the migration patterns of more than 10 species of birds, focusing on, but not limited to, cranes (Gruidae) and storks (Ciconiidae). To relay bird locations, we employed platform transmitter terminals in combination with ARGOS satellites. Location data were then ut...

Journal: :BioEssays : news and reviews in molecular, cellular and developmental biology 2006
Jon F Wilkins Frank W Marlowe

Different patterns of mitochondrial and Y-chromosome diversity have been cited as evidence of long-term patrilocality in human populations. However, what patterns are expected depends on the nature of the sampling scheme. Samples from a local region reveal only the recent demographic history of that region, whereas sampling over larger geographic scales accesses older demographic processes. A h...

2007
Lesia Nedoluzhko Gunnar Andersson

This article investigates the reproductive behavior of young women and men in the post-Soviet Central Asian republic of Kyrgyzstan, focusing on the link between migration and fertility. We employ event-history techniques to retrospective data from the ‘Marriage, Fertility, and Migration’ survey conducted in Northern Kyrgyzstan in 2005 to study patterns in first-time parenthood. We demonstrate t...

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