نتایج جستجو برای: nb ترکیبات بینفلزی

تعداد نتایج: 35948  

2008
Sheng-Long Jeng Hwa-Ten Lee Jiunn-Yuan Huang Roang-Ching Kuo

The purpose of this paper was to investigate the effects of Nb on the microstructure and elevated-temperature mechanical properties of Alloy 690-SUS 304L dissimilar welds. The results show that the welds were dominant with dendrites and interdendritic phases. In the low Nb welds, the main interdendritic phases were Nb-rich and Al-Ti-rich phases. Cr-carbides were precipitated along the grain bou...

Journal: :Physical review letters 2006
C Merschjann D Berben M Imlau M Wöhlecke

The recombination of photoinduced free Nb(4+)(Nb) and bound Nb(4+)(Li) small polarons toNb(4+)(Li): Nb(4+)(Nb) bipolarons is investigated in nominally pure, reduced LiNbO(3) single crystals by means of excited-state-absorption spectroscopy. We discovered a two-component decay of the light-induced absorption alpha(li)(t) for probe light at lambda=785 nm and moderate pump beam intensities (I(p) <...

2012
Mingyuan Zhou Lawrence Carin

By developing data augmentation methods unique to the negative binomial (NB) distribution, we unite seemingly disjoint count and mixture models under the NB process framework. We develop fundamental properties of the models and derive efficient Gibbs sampling inference. We show that the gamma-NB process can be reduced to the hierarchical Dirichlet process with normalization, highlighting its un...

2012
Julie Liberman Hervé Sartelet Marjorie Flahaut Annick Mühlethaler-Mottet Aurélie Coulon Carine Nyalendo Gilles Vassal Jean-Marc Joseph Nicole Gross

Neuroblastoma (NB) is a typical childhood and heterogeneous neoplasm for which efficient targeted therapies for high-risk tumors are not yet identified. The chemokine CXCL12, and its receptors CXCR4 and CXCR7 have been involved in tumor progression and dissemination. While CXCR4 expression is associated to undifferentiated tumors and poor prognosis, the role of CXCR7, the recently identified se...

Journal: :Clinical cancer research : an official journal of the American Association for Cancer Research 1999
X X Tang A E Evans H Zhao A Cnaan W London S L Cohn G M Brodeur N Ikegaki

Neuroblastoma (NB) is a common pediatric tumor of neural crest origin that is biologically and clinically heterogeneous. EPH family receptor tyrosine kinases and ephrin ligands play fundamental roles in neurodevelopmental processes. Recently, we found that NB cell lines expressed several EPHB and EFNB transcripts, which encode EPHB subgroup receptors and ephrin-B subgroup ligands, respectively....

2006
Samanta Piano J. W. A. Robinson G. Burnell M. G. Blamire

The physics of the π phase shift in ferromagnetic Josephson junctions enables a range of applications for spin-electronic devices and quantum computing. We investigate transitions from “0” to “π” states in Nb/Fe/Nb Josephson junctions by varying the Fe barrier thickness from 0.5 nm to 5.5 nm. From magnetic measurements we estimate for Fe a magnetic dead layer of about 1.1 nm. By fitting the cha...

2015
Masato Nakaguro Shinichi Kiyonari Satoshi Kishida Dongliang Cao Yuko Murakami-Tonami Hitoshi Ichikawa Ichiro Takeuchi Shigeo Nakamura Kenji Kadomatsu

Neuroblastoma (NB) is a childhood malignant tumor that arises from precursor cells of the sympathetic nervous system. Spontaneous regression is a phenomenon unique to NBs and is caused by differentiation of tumor cells. PES1 is a multifunctional protein with roles in both neural development and ribosome biogenesis. Various kinds of models have revealed the significance of PES1 in neurodevelopme...

2016
Haoyu Li Zhenghu Chen Ting Hu Long Wang Yang Yu Yanling Zhao Wenijing Sun Shan Guan Jonathan C. Pang Sarah E. Woodfield Qing Liu Jianhua Yang

Neuroblastoma (NB) is the most common extracranial malignant solid tumor seen in children and continues to lead to the death of many pediatric cancer patients. The poor outcome in high risk NB is largely attributed to the development of chemoresistant tumor cells. Doxorubicin (dox) has been widely employed as a potent anti-cancer agent in chemotherapeutic regimens; however, it also leads to che...

Journal: :Accident; analysis and prevention 2012
Srinivas Reddy Geedipally Dominique Lord Soma Sekhar Dhavala

There has been a considerable amount of work devoted by transportation safety analysts to the development and application of new and innovative models for analyzing crash data. One important characteristic about crash data that has been documented in the literature is related to datasets that contained a large amount of zeros and a long or heavy tail (which creates highly dispersed data). For s...

2015
Daniela Di Paolo D. Yang Fabio Pastorino Laura Emionite Michele Cilli Antonio Daga Elisa Destefanis Annarita Di Fiore Francesca Piaggio Chiara Brignole Xiaobao Xu Chris Liang James Gibbons Mirco Ponzoni Patrizia Perri

Many different aberrations in the Anaplastic Lymphoma Kinase (ALK) were found to be oncogenic drivers in several cancers including neuroblastoma (NB), therefore ALK is now considered a critical player in NB oncogenesis and a promising therapeutic target. The ALK-inhibitor crizotinib has a limited activity against the various ALK mutations identified in NB patients. We tested: the activity of th...

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