نتایج جستجو برای: samarium

تعداد نتایج: 1033  

2018
D. Bossini D. Malik B. Redlich A. F. G. van der Meer R. V. Pisarev Th. Rasing A. V. Kimel

Journal: :Journal of Synthetic Organic Chemistry, Japan 1999

Journal: :Nature chemistry 2016
Stanislav Strekopytov

Many years ago while studying for a degree in mineralogy, I was privileged to visit the Russian Ilmen Mountains, host to two minerals from which several rare-earth elements were discovered — monazite ((Ce, La, Nd, Th)PO4), and another mineral that was first described in 1839 by the German mineralogist Gustav Rose. He found uranium and tantalum in its composition and thus proposed the name urano...

Journal: :Journal of physics. Condensed matter : an Institute of Physics journal 2010
E Rogers P F Smet P Dorenbos D Poelman E van der Kolk

High quality phase pure samarium monosulfide (SmS) thin films were prepared by electron beam evaporation using a samarium metal source in a H(2)S atmosphere. The optical properties (reflection, transmission, absorption) of the films in the semiconducting and metallic phase were analysed from the UV to the mid-IR and explained in terms of the electronic structure of SmS. In this paper it will be...

Journal: :Organic letters 2000
T Honda M Kimura

[reaction: see text] An enantiospecific synthesis of a coccinellied alkaloid, (-)-adalinine, was established starting from (S)-(-)-pyroglutamic acid, where a stereoselective Michael addition and a samarium iodide-promoted regioselective carbon-nitrogen bond cleavage reaction were involved as the key reactions.

Journal: :Nature Chemistry 2008

Journal: :Dalton transactions 2015
Fanny Bonnet Hellen E Dyer Yassine El Kinani Carin Dietz Pascal Roussel Marc Bria Marc Visseaux Philippe Zinck Philip Mountford

New bis(phenolate)amine-supported neodymium borohydride complexes and their previously reported samarium analogues were tested as catalysts for the polymerisation of styrene and isoprene. Reaction of Na2O2N(L) (L = py, OMe, NMe2) with Nd(BH4)3(THF)3 afforded the borohydride complexes Nd(O2N(L))(BH4)(THF) (L = py (1-Nd), OMe (2-Nd), NMe2 (3-Nd)). Complex 1-Nd has shown a propensity to form pheno...

Journal: :Acta crystallographica. Section D, Biological crystallography 2005
Todd C Appleby Gary Larson I Wayne Cheney Heli Walker Jim Z Wu Weidong Zhong Zhi Hong Nanhua Yao

Uridine-cytidine nucleoside kinase 2 (UCK2) is the rate-limiting enzyme in the pyrimidine-nucleotide salvage pathway. UCK2 catalyzes the phosphorylation of the natural ribonucleosides cytidine and uridine to cytidine 5'-monophosphate (CMP) and uridine 5'-monophosphate (UMP), respectively, and activates several important frontline antimetabolite drugs. The present contribution reports the rapid ...

Journal: :asia oceania journal of nuclear medicine and biology 0
narjess ayati nuclear medicine research center, mashhad university of medical science, faculty of medicine, mashhad, iran kamran aryana nuclear medicine research center, mashhad university of medical science, faculty of medicine, mashhad, iran amir jalilian radiopharmaceutical research & development laboratory (rrdl), nuclear science and technology research institute (nstri), tehran, iran toktam hoseinnejad nuclear medicine research center, mashhad university of medical science, faculty of medicine, mashhad, iran ali bahrami samani radiopharmaceutical research & development laboratory (rrdl), nuclear science and technology research institute (nstri), tehran, iran zahra ayati school of pharmacy, mashhad university of medical science, mashhad, iran

introduction: involvement of the skeleton can cause an excruciating pain in two-thirds of terminal patients with a history of malignancy. due to several limitations of other therapies, such as analgesics, bisphosphonates, chemotherapy, hormonal therapy and external beam radiotherapy; bone-seeking radiopharmaceuticals have an important role in palliation of pain from bone metastases. although th...

2016
W. A. Phelan S. M. Koohpayeh P. Cottingham J. A. Tutmaher J. C. Leiner M. D. Lumsden C. M. Lavelle X. P. Wang C. Hoffmann M. A. Siegler N. Haldolaarachchige D. P. Young T. M. McQueen

Recent theoretical and experimental findings suggest the long-known but not well understood low temperature resistance plateau of SmB6 may originate from protected surface states arising from a topologically non-trivial bulk band structure having strong Kondo hybridization. Yet others have ascribed this feature to impurities, vacancies, and surface reconstructions. Given the typical methods use...

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