نتایج جستجو برای: weak tie

تعداد نتایج: 147920  

Journal: :Blood 1996
P Batard P Sansilvestri C Scheinecker W Knapp N Debili W Vainchenker H J Bühring M N Monier E Kukk J Partanen M T Matikainen R Alitalo J Hatzfeld K Alitalo

Growth factor receptors in human hematopoietic progenitor cells have become the focus of intense interest, because they may provide tools for the monitoring, enrichment, and expansion of stem cells. We have shown earlier that the Tie receptor tyrosine kinase is expressed in erythroid and megakaryoblastic human leukemia cell lines, in the blood islands of the yolk sac, and in endothelial cells s...

2012
Gabriela Melen-Mucha Agata Niedziela Slawomir Mucha Ewelina Motylewska Hanna Lawnicka Jan Komorowski Henryk Stepien

BACKGROUND Gastro-entero-pancreatic/neuroendocrine (NET) tumors are highly vascularized neoplasms. However, our knowledge concerning circulating levels of the angiogenic factors in NET patients still remains insufficient. METHODS The aim of this study was to measure plasma concentrations of VEGF, angiopoietin 1 (Ang-1), angiopoietin 2 (Ang-2), soluble Tie-2, endostatin, osteopontin (OPN) and ...

2006
Qing Quan LIANG

This paper presents the performance-based optimization of strut-and-tie models in reinforced concrete beam-column connections. The performance-based optimization (PBO) technique is employed to investigate optimal strut-and-tie models in reinforced concrete beam-column connections. Developing strut-and-tie models in reinforced concrete beam-column connections is treated as a topology optimizatio...

Journal: :physical chemistry research 0
h ghanadzadeh gilani ali ghanadzadeh gilani departent of chemistry, university of guilan. rasht, iran f borji peydeh s.l. seyed saadat s ahmadifar

liquid-liquid equilibria for the (water + lactic acid + benzyl alcohol or p-xylene) ternary systems were investigated at atmospheric pressure and in the temperature range from 298.15-318.15 k. the studied systems exhibit two types of liquid-liquid equilibrium (lle) behavior. the system consisting of benzyl alcohol displays type-1 lle behavior, while a type-2 behavior is exhibited by the other s...

Journal: :International Journal of Circuit Theory and Applications 2023

Summary Modern power networks are enormously complex and frequently interconnected by weak tie‐lines, which results in a variety of stability issues such as low frequency oscillations (LFOs). LFOs can have negative impact on system tie‐line transmission capacity, resulting catastrophic blackouts if suitable damping control mechanisms not situ. This article demonstrates robust design for inter‐a...

Journal: :Acta neurobiologiae experimentalis 2008
HuaJun Zhou Tao Tang Canjie Guo Hainan Zhang JianHua Zhong Jie Zheng JieKun Luo Yuan Lin Wei Liu WenFang Luo QiDong Yang

Angiopoietin-1 (Ang-1) belongs to a novel family of endothelial growth factors that function as ligands for an endothelialspecific receptor tyrosine kinase (Tie-2). The Ang-/Tie-2 system may contribute to angiogenesis and vascular remodeling by mediating interactions of endothelial cells with smooth muscle cells and pericytes. The spatial distribution and temporal expression of Ang-1 and Tie-2 ...

2012
Yi Wu Klarissa Ting-Ting Chang

Why some dyadic interactions are more likely than others to trigger hinder the generation of novel and useful ideas? To investigate this question, we examine the attributes of dyadic ties that influence the generation of creative ideas, and how the strength of influence changes contingently on the mix use of communication media. Our study extends previous research by examining the impacts of Si...

Journal: :Mechanisms of Development 2001
Delphine Moyon Luc Pardanaud Li Yuan Christiane Bréant Anne Eichmann

The expression of angiopoietin1 and 2 (ang1 and 2) and their receptor tie-2 was studied in avian embryos using in situ hybridization. Ang1 was transcribed in the mesenchymal cells surrounding venous endothelium expressing tie-2. By contrast, ang2 was transcribed around arteries in which the endothelium down-regulated tie-2 mRNA. The aorta and large arteries of the heart outflow tract were never...

2014
Alka Yadav Pawan Yadav

A micro strip-fed printed bow-tie antenna is presented inorder to achieve wide bandwidth, high gain, and size reduction. A comparisonbetween the bow-tie and the quasi-Yagi (dipole and director)antennas shows that the bow-tie antenna has a wider bandwidth, highergain, lower front-to-back ratio, lower crosspolarization level, andsmaller size. Two-element arrays are designed and their characterist...

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید