نتایج جستجو برای: caesium compounds

تعداد نتایج: 227423  

Journal: :Chemical communications 2010
Thomas B Faust Paul G Heath Christopher A Muryn Grigore A Timco Richard E P Winpenny

A fluoro-metallocrown selectively binds caesium, extracting it from aqueous solutions into an organic layer; the binding of Cs is monitored by (1)H-NMR of the paramagnetic complexes.

2009
Jing Zhu Wen-Dan Cheng Hao Zhang

Caesium europium polyphosphate, CsEu(PO(3))(4), was synthesized by a high-temperature solution reaction. Its structure is charaterized by a three-dimensional framework made up of double PO(4) spiral chains and EuO(8) and CsO(11) polyhedra.

2006
GRZEGORZ J. PORÊBA

This paper describes a method of soil erosion and soil movement measurements using 137Cs as a tracer. This technique has been used successfully employed for more than 30 years. Caesium-137 is a valuable tracer to study soil erosion. Its chemical and biological movement in soil is limited. Practically all redeposition of caesium-137 in soil after fallout occurs with soil particles due to strong ...

2018
Ikechukwu K. Ukaegbu Kelum A. A. Gamage

Existing remote radioactive contamination depth estimation methods for buried radioactive wastes are either limited to less than 2 cm or are based on empirical models that require foreknowledge of the maximum penetrable depth of the contamination. These severely limits their usefulness in some real life subsurface contamination scenarios. Therefore, this work presents a novel remote depth estim...

Journal: :Gut 2000
J L Newton A Allen B R Westley F E May

BACKGROUND TFF1 is a 6.5 kDa secreted protein that is expressed predominantly in normal gastric mucosa. It is coexpressed with mucins and it can form dimers via a free carboxy terminal cysteine residue. AIMS To investigate the molecular forms of TFF1 that are present in normal human stomach and the association of the different molecular forms with mucus. SUBJECTS All subjects had macroscopi...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه تربیت مدرس 1382

‏‎the main purpose of this research was to:1.develop a coking model for thermal cracking of naphtha.2.study coke inhibition methods using different coke inhibitors.developing a coking model in naphtha cracking reactors requires a suitable model of the thermal cracking reactor based on a reliable kinetic model.to obtain reliable results all these models shall be solved simultaneously.for this pu...

2009
Monika Gupta Rajive Gupta Medha Anand

The Knoevenagel condensation between aromatic aldehydes and malononitrile, ethyl cyanoacetate or malonic acid with hydroxyapatite supported caesium carbonate in water is described. HAP-Cs₂CO₃ was found to be a highly active, stable and recyclable catalyst under the reaction conditions.

2017
Liva Dzene Eric Ferrage Jean-Christophe Viennet Emmanuel Tertre Fabien Hubert

Radioactive caesium pollution resulting from Fukushima Dai-ichi and Chernobyl nuclear plant accidents involves strong interactions between Cs+ and clays, especially vermiculite-type minerals. In acidic soil environments, such as in Fukushima area, vermiculite is subjected to weathering processes, resulting in aluminization. The crystal structure of aluminized clays and its implications for Cs+ ...

2011
L. Schiesko P. McNeely

Systematic Langmuir probe measurements were performed during the caesium (Cs) conditioning of the IPP prototype negative hydrogen ion source. Conditioning consists of slowly injecting caesium into the source in order to increase the extracted negative ion current and minimize the co-extraced electrons. This process usually takes several days. Measurements were taken near the plasma grid where t...

2014
G. Epple K. S. Kleinbach T. G. Euser N. Y. Joly T. Pfau P. St. J. Russell R. Löw

The exceptionally large polarizability of highly excited Rydberg atoms-six orders of magnitude higher than ground-state atoms--makes them of great interest in fields such as quantum optics, quantum computing, quantum simulation and metrology. However, if they are to be used routinely in applications, a major requirement is their integration into technically feasible, miniaturized devices. Here ...

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