نتایج جستجو برای: cesium atom

تعداد نتایج: 53496  

2017
Eri Adams Takae Miyazaki Aya Hayaishi-Satoh Minwoo Han Miyako Kusano Himanshu Khandelia Kazuki Saito Ryoung Shin

Phytoaccumulation is a technique to extract metals from soil utilising ability of plants. Cesium is a valuable metal while radioactive isotopes of cesium can be hazardous. In order to establish a more efficient phytoaccumulation system, small molecules which promote plants to accumulate cesium were investigated. Through chemical library screening, 14 chemicals were isolated as 'cesium accumulat...

2004

Naturally-occurring cesium exists as the stable isotope (Cs) in the earth’s crust at an average concentration of about 1 ppm in granites and 4 ppm in sedimentary rocks. The most important source of commercial cesium is the mineral pollucite, which usually contains about 5–32% Cs2O by weight. The largest deposits of pollucite are located in Manitoba, Canada and account for about two-thirds of th...

Journal: :Applied and environmental microbiology 1994
N Tomioka H Uchiyama O Yagi

Growth and cesium accumulation characteristics of two cesium-accumulating bacteria isolated from soils were investigated. Rhodococcus erythropolis CS98 and Rhodococcus sp. strain CS402 accumulated high levels of cesium (approximately 690 and 380 mumol/g [dry weight] of cells or 92 and 52 mg/g [dry weight] of cells, respectively) after 24 h of incubation in the presence of 0.5 mM cesium. The opt...

Journal: :The Journal of neuroscience : the official journal of the Society for Neuroscience 1997
D Janigro S Gasparini R D'Ambrosio G McKhann D DiFrancesco

Extracellular cesium causes synchronous, interictal-like bursting and prevents maintenance of long-term depression (LTD) in the CA1 hippocampal region. We have investigated the cellular mechanisms underlying cesium actions. Whole-cell recordings showed that brief (2 min) bath exposures to cesium caused pyramidal cell hyperpolarization associated with decreased membrane conductance attributable ...

2017
W. A. Gault T. L. Young H. A. Wilhelm

Aluminum metal was found to liberate cesium almost quantitatively from pollucite ore when reacted under conditions of operation determined by experiments described in the paper. In the treatment, ore ground to pass a 150 mesh sieve is mixed with atomized aluminum and the mixture heated under an inert atmosphere in a retort. Pollucite ore from one source yielded its cesium when treated at 950°C ...

حاجی علی, ابراهیم, ضیایی, فرهود, عباسی دوانی, فریدون,

In this research, the vertical Bridgman method has used to perform the single crystal growth of cesium iodide alkali halide. To this purpose, a vertical cylindrical furnace equipped with electric elements with five different thermal regions has been designed and constructed. The temperature gradient of the furnace can be controlled up to 1000○C with 0.1○C accuracy. Several cesium iodide sample ...

2003
J. McKeever A. Boca A. D. Boozer J. R. Buck H. J. Kimble Norman Bridge

Although a number of theoretical treatments related to a one-atom laser have appeared in the literature [2–12], this prior work has not been specific to the parameter range of our experiment as reported in Ref. [1]. A principal purpose of this Supplementary Information is to present a brief description of the relationship of the operating regime of our experiment to that of more conventional la...

2013
Eri Adams Parisa Abdollahi Ryoung Shin

It has been suggested that cesium is absorbed from the soil through potassium uptake machineries in plants; however, not much is known about perception mechanism and downstream response. Here, we report that the jasmonate pathway is required in plant response to cesium. Jasmonate biosynthesis mutant aos and jasmonate-insensitive mutant coi1-16 show clear resistance to root growth inhibition cau...

Journal: :international journal of environmental research 0
h. bagheri sadeghi department of chemistry, islamic azad university, central tehran branch, tehran, iran h. sid kalal department of waste management, nfrs, nuclear science and technology institute, aeoi, p. o. box 11365-3486, tehran, iran h. hoveidi graduate faculty of environment, university of tehran, p.o. box 14155-6135, tehran, iran z. molavi department of chemistry, islamic azad university, central tehran branch, tehran, iran n. adeli asl graduate faculty of environment, university of tehran, p.o. box 14155-6135, tehran, iran

a new cesium ion selective pvc membrane based on parent calix [4] arene was developed for potentiometric determination of cesium in environmental samples. the electrode based on p-5,11,17,23tetra(tertbutyl) 25,26,27,28-tetrahydroxy calix[4]arene(thc) as ionophor ,dibutyl phthalate (dbp)as plasticizer ,sodium tetra phenyl borate(natpb)and oleic acid as lipophilic salt and additive showed the bes...

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