نتایج جستجو برای: samarium 153

تعداد نتایج: 12920  

Journal: :Journal of Phase Equilibria 2001

Journal: :Journal of Phase Equilibria and Diffusion 2012

Journal: :Nucleosides, nucleotides & nucleic acids 2004
Satoshi Ichikawa Akira Matsuda

A tunicaminyluracil derivative, which is a key component of the tunicamycin nucleoside antibiotics, was synthesized using a samarium diiodide (SmI2) mediated aldol reaction and intramolecular Pummerer reaction as the key steps. The alpha-phenylthio ketone 11, the precursor of the samarium enolate, was prepared from D-galactose. Treatment of 11 with SmI2 at -40 degrees C resulted in complete con...

2004
Kristen James

Monte Amiata is a recently extinct volcano that produced trachydacites and a few small olivine latite flows. The Amiata suite showed crustal strontium, neodymium, and lead isotopic signatures. Sr/Sr ratio values ranged from 0.712447 to 0.713068 and Nd/Nd ratios ranged from 0.512094 to 0.512203. Pb/Pb values ranged from 15.6694 to 16.2330 and Pb/Pb ratios ranged from 18.7125 to 19.0882. The oliv...

2017
Hirokazu Shimoshige Yoshikata Nakajima Hideki Kobayashi Keiichi Yanagisawa Yutaka Nagaoka Shigeru Shimamura Toru Mizuki Akira Inoue Toru Maekawa

Magnetotactic bacteria (MTB) synthesize magnetosomes composed of membrane-enveloped magnetite (Fe3O4) or greigite (Fe3S4) particles in the cells. Recently, several studies have shown some possibilities of controlling the biomineralization process and altering the magnetic properties of magnetosomes by adding some transition metals to the culture media under various environmental conditions. Her...

2009
Yujun Song Laurence L Henry

An in siturapid cooling and passivating microfluidic processhas been developed for the synthesis of nearly monodispersed cobalt samarium nanoparticles (NPs) with tunable crystal structures and surface properties. This process involves promoting the nucleation and growth of NPs at an elevated temperature and rapidly quenching the NP colloids in a solution containing a passivating reagent at a re...

Journal: :Realidad: Revista de Ciencias Sociales y Humanidades 2020

Journal: :Molecules 2012
Masakazu Sono Natsuko Ise Tsutomu Shoji Motoo Tori

One-electron reductive intramolecular cyclization of enones with ketones or aldehydes mediated by samarium diiodide and electrolysis to afford cis-trimethyl- hydrindanolones. The reactions gave selectivities ranging from 1:1 to 100:0 depending on the conditions.

Journal: :Realidad: Revista de Ciencias Sociales y Humanidades 2019

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