نتایج جستجو برای: palladium doped

تعداد نتایج: 60373  

Journal: :Chemical communications 2016
Meifang Zheng Pengquan Chen Wanqing Wu Huanfeng Jiang

We describe herein a palladium-catalyzed Heck-type reaction of O-acetyl ketoximes and allylic alcohols to synthesise pyridines. This protocol allows the robust synthesis of pyridines and azafluorenones in good to excellent yields with tolerance of various functional groups under mild conditions. The reaction is supposed to go through an oxidative addition of oximes to palladium(0) complexes, ge...

2004
GLOW DISCHARGE

Elemental and isotopic structures of the palladium cathode before and after experiment under DC glow discharge were investigated by time of flight secondary ion mass spectrometry (TOF-SIMS). Production of new elements with various atomic masses and impurities increase were surveyed. By analyzing obtained results, it was found that beryllium and nickel for deuterium-palladium system, and lithium...

Journal: :Applied radiation and isotopes : including data, instrumentation and methods for use in agriculture, industry and medicine 2001
Z Chunfu W Yongxian Z Yongping Z Xiuli

Electroplated rhodium foil was employed as the target for cyclotron production of palladium-103. An electrodissolution apparatus was found better than other dissolution methods in terms of personnel shielding and palladium-103 yield. The ion-exchange column chromatography method was simple and effective for the purification of palladium-103 and the final stripping agent of NH4Cl + NH3(1:1) was ...

Journal: :Molecules 2010
Martin H G Prechtl Jackson D Scholten Jairton Dupont

A brief summary of selected pioneering and mechanistic contributions in the field of carbon-carbon cross-coupling reactions with palladium nanoparticles (Pd-NPs) in ionic liquids (ILs) is presented. Five exemplary model systems using the Pd-NPs/ILs approach are presented: Heck, Suzuki, Stille, Sonogashira and Ullmann reactions which all have in common the use of ionic liquids as reaction media ...

Journal: :iranian journal of radiation research 0
m.r. ghahramani nuclear research and technology research school, atomic energy organization of iran, tehran, iran f. asgharizadeh nuclear research and technology research school, atomic energy organization of iran, tehran, iran m.r. assadi nuclear research and technology research school, atomic energy organization of iran, tehran, iran s.j. ahmadi nuclear research and technology research school, atomic energy organization of iran, tehran, iran k. moradi nuclear research and technology research school, atomic energy organization of iran, tehran, iran

background: one of the key techniques for the preparation of 125i seeds is adsorption of 125i onto silver bits coated by palladium (pd). carriers played an important role in the adsorption of 125i on palladium. ki is used as a carrier for fixing of 125i onto silver wire bits coated with palladium. materials and methods: three procedures ki, koh, nh4oh were investigated for adsorption of 125i ac...

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید