نتایج جستجو برای: dd and yb pathways

تعداد نتایج: 16847191  

2015
T Szücs GG Kiss T Rauscher Zs Török Z Halász Zs Fülöp E Somorjai

In this paper we present the ongoing experiments at ATOMKI related to our systematic γ-process studies. These studies are intended to enlarge the limited experimental database from α-induced reactions on nuclei in the heavier mass range of the γ-process. In all presented cases the activation method was used. The details of the cross section measurements and preliminary results on In(α,n)Sb, In(...

2015
Feifei Huang Xueqiang Liu Yaoyao Ma Shuai Kang Lili Hu Danping Chen

We report the near to middle infrared luminescence and energy transfer process of Er(3+)/Yb(3+) co-doped fluorotellurite glasses under 980, 1550 and 800 nm excitations, respectively. Using a 980 nm laser diode pump, enhanced 1.5 and 2.7 μm emissions from Er(3+):I13/2→(4)I15/2 and I11/2→(4)I13/2 transitions are observed, in which Yb(3+) ions can increase pumping efficiency and be used as energy ...

2017
Liang Jiang Gao-Le Yuan Qi-Lian Liang Hui-Jie Zhang Jie Huang Shao-Ang Cheng Xiao-Xia Peng

BACKGROUND Y-box binding protein 1 (YB-1) belongs to the cold shock domain protein family involved in transcription and translation. We conducted a meta-analysis of the association between YB-1 expression and the survival and clinicopathological features in NSCLC. METHODS PubMed and Embase were searched to identify studies that evaluated the YB-1 expression (by immunohistochemistry) and overa...

Journal: :journal of crop protection 2015
guillermo heit walter sione pablo cortese

lobesia botrana (denis & schiffermüller) (lepidoptera: tortricidae), is an important vineyard-pest in the european and mediterranean areas and it was recently described in argentina and chile. since knowledge on the l. botrana phenology on argentina is still limited, the objective of this study was to develop a phenological model to predict voltinism of l. botrana in argentina through a reg...

2016
Kummara Venkata Krishnaiah Elton Soares de Lima Filho Yannick Ledemi Galina Nemova Younes Messaddeq Raman Kashyap

Oxyfluoride glasses doped with 2, 5, 8, 12, 16 and 20 mol% of ytterbium (Yb(3+)) ions have been prepared by the conventional melt-quenching technique. Their optical, thermal and thermo-mechanical properties were characterized. Luminescence intensity at 1020 nm under laser excitation at 920 nm decreases with increasing Yb(3+) concentration, suggesting a decrease in the photoluminescence quantum ...

2015
Heather J. Melichar Leslie J. Berg Rachel Gerstein Zheng-Zheng Bao Joonsoo Kang

Mature af3and yb T cells arise from a common precursor population in the thymus. Much debate has focused on the mechanism of T cell lineage choice made by these multi-potential precursor cells. It is widely believed that the decision of these precursor cells to commit to the yb or af3 T cell lineages is regulated primarily by a specific instrctive signal relayed through the appropriate T cell r...

Journal: :Nucleic acids research 1997
M Bellorini D K Lee J C Dantonel K Zemzoumi R G Roeder L Tora R Mantovani

Both the TATA and CCAAT boxes are widespread promoter elements and their binding proteins, TBP and NF-Y, are extremely conserved in evolution. NF-Y is composed of three subunits, NF-YA, NF-YB and NF-YC, all necessary for DNA binding. NF-YB and NF-YC contain a putative histone-like motif, a domain also present in TBP-associated factors (TAFIIs) and in the subunits of the transcriptional represso...

2015
Sundaravadivel Balasubramanian Michael G Janech Graham W Warren

Yogic breathing (YB) has been suggested to reduce stress and blood pressure and increase cognitive processes. However, alterations after YB at the molecular level are not well established. Twenty healthy volunteers were randomized into two groups (N = 10 per group): YB or attention controls (AC). The YB group performed two YB exercises, each for ten minutes, for a total of twenty minutes in a s...

2012
Tiziana Passuello Marco Pedroni Fabio Piccinelli Stefano Polizzi Pasquina Marzola Stefano Tambalo Giamaica Conti Donatella Benati Fiorenzo Vetrone Marco Bettinelli Adolfo Speghini

A facile method for the synthesis of water dispersible Er/Yb and Tm/Yb doped upconverting GdF3 nanoparticles is reported. Strong upconversion emissions are observed in the red (for Er/Yb doped) and near-infrared (for Tm/Yb doped) regions upon laser excitation at 980 nm. The PEG coating ensures a good dispersion of the system inwater and reduces the radiationless de-excitation of the excited sta...

Journal: :Inorganic chemistry 2001
P Gerner O S Wenger R Valiente H U Güdel

Direct near-IR excitation of Yb(3+) 2F(7/2)-->(2)F(5/2) levels at 10126, 10138, and 10596 cm(-1) in CsMnBr3:0.5%Yb(3+) leads to three types of luminescence at cryogenic temperatures: near-IR Yb(3+) emission and green and red upconverted luminescence. The green luminescence around 20 000 cm(-1) is identified as cooperative Yb(3+) pair upconversion. The broad red upconversion luminescence band ce...

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