نتایج جستجو برای: emigration

تعداد نتایج: 3005  

2014
Ivana Kolčić Mihaela Čikeš Kristina Boban Jasna Bućan Robert Likić Goran Ćurić Zoran Đogaš Ozren Polašek

AIM To investigate the emigration-related attitudes of final year medical students in Croatia at the dawn of the EU accession in 2013. METHODS All final-year medical students at four Croatian medical schools (Zagreb, Rijeka, Split, and Osijek) were invited to participate in a cross-sectional survey on emigration attitudes. RESULTS Among 260 respondents (response rate 61%), 90 students (35%)...

Journal: :Ecology 2006
Erin Muths Rick D Scherer Paul Stephen Corn Brad A Lambert

Male boreal toads (Bufo boreas) are thought to return to the breeding site every year but, if absent in a particular year, will be more likely to return the following year. Using Pollock's robust design we estimated temporary emigration (the probability a male toad is absent from a breeding site in a given year) at three locations in Colorado, USA: two in Rocky Mountain National Park and one in...

2012
Elie A Akl Nancy Maroun Aline Rahbany Amy Hagopian

BACKGROUND Lebanon is witnessing an increased emigration of physicians. The objective of this study was to understand the perceptions of Lebanese policymakers of this emigration, and elicit their proposals for future policies and strategies to deal with this emigration. METHODS We conducted semi-structured individual interviews with the deans of Lebanon's seven medical schools, the presidents...

Journal: :The Journal of clinical investigation 2002
Mark C Poznansky Ivona T Olszak Richard H Evans Zhengyu Wang Russell B Foxall Douglas P Olson Kathryn Weibrecht Andrew D Luster David T Scadden

T cells leave the thymus at a specific time during differentiation and do not return despite elaboration of known T cell chemoattractants by thymic stroma. We observed differentiation stage-restricted egress of thymocytes from an artificial thymus in which vascular structures or hemodynamics could not have been playing a role. Hypothesizing that active movement of cells away from a thymic produ...

Journal: :Journal of immunology 1999
A Cariappa T J Kim S Pillai

The B cell receptor is required for the emigration of newly generated B lymphocytes and for their maintenance in the periphery. A specific maintenance defect was noted in fraction I (IgDhighIgMlow) B cells in Xid mice (which harbor a mutation in Btk). Although Bcl-2 levels in fractions I and II (IgDhighIgMhigh) are equivalent in normal and Xid B cells, a novel peak of Bcl-2low fraction III (IgD...

Journal: :Population studies 2013
Hendrik P van Dalen Kène Henkens

We examined the emigration intentions of native-born Dutch residents and their subsequent emigration behaviour from 2005 to 2010. Data were collected from two surveys on emigration intentions, one conducted locally and one nationally. A number of novel results stand out. First, intentions were good predictors of future emigration: 34 per cent of those who had stated an intention to emigrate act...

2017
Rong Jin Abudureyimujiang Aili Yuqing Wang Jia Wu Xiuyuan Sun Yu Zhang Qing Ge

Autoimmune regulator (Aire) is essential in the perinatal period to prevent the multiorgan autoimmunity. Here we show that Aire-regulated single positive thymocyte trafficking in neonatal period is critical for thymic egress. Reduced thymic emigration was found in Aire-/- mice during neonatal period, leading to enhanced homeostatic expansion of peripheral T cells as early as 2 weeks of age. In ...

Journal: :Investigative ophthalmology & visual science 2006
Zhijie Li Alan R Burns C Wayne Smith

PURPOSE Corneal abrasion results in an inflammatory response characterized by leukocyte emigration into the corneal stroma. Adhesion molecules play a critical role in leukocyte emigration to wound sites, but differences are evident in different vascular beds. In this study, the contributions of two families of adhesion molecules to neutrophil emigration into the cornea were investigated. METH...

Journal: :The Journal of Experimental Medicine 2007
Tom M. McCaughtry Matthew S. Wilken Kristin A. Hogquist

Conventional alphabeta T cell precursors undergo positive selection in the thymic cortex. When this is successful, they migrate to the medulla and are exposed to tissue-specific antigens (TSA) for purposes of central tolerance, and they undergo maturation to become functionally responsive T cells. It is commonly understood that thymocytes spend up to 2 wk in the medulla undergoing these final m...

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