نتایج جستجو برای: chemical purification

تعداد نتایج: 430546  

Journal: :Journal of Synthetic Organic Chemistry, Japan 1953

2013
R. S. Boiko A. S. Barabash P. Belli M. Laubenstein D. V. Poda

Cerium, neodymium and gadolinium contain double beta active isotopes. The most interesting are Nd and Gd (promising for 02 search), Ce (2 candidate with one of the highest Q2). The main problem of compounds containing lanthanide elements is their high radioactive contamination by uranium, radium, actinium and thorium. The new generation 2 experiments require development of methods for a de...

Journal: :Minutes of the Proceedings of the Institution of Civil Engineers 1886

Journal: :Journal of Materials Research 2022

Abstract Boron nitride nanotubes (BNNTs) will be one of the most important materials this century. Recent synthetic advances have made BNNTs viable candidates for advanced multifunctional materials. Like carbon and graphene, h-BN extraordinary physical properties. Unlike CNTs, a wideband gap; they are piezoelectric, neutron radiation shielding capability, can withstand degradation up to 1000 °C...

2017
Lars H. Peeck Estelle Zelter Patricia Greenhalgh

anufacturers strive toward cost-effective purification of target molecules and a high level of confidence that their biologics are safe and not compromised by the presence of endogenous retrovirus-like particles or adventitious viruses (1). Reliable reduction of viral particles throughout downstream purification processes must be ensured through different techniques such as chemical treatment, ...

Journal: :Molecules 2013
Bent W Schoultz Brian J Reed János Marton Frode Willoch Gjermund Henriksen

We have developed a new method for automated production of 2-[18F]fluoroethyl tosylate ([18F]FETos) that enables 18F-alkylation to provide PET tracers with high chemical purity. The method is based on the removal of excess ethylene glycol bistosylate precursor by precipitation and subsequent filtration and purification of the filtrate by means of solid phase extraction cartridges (SPE). The met...

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