نتایج جستجو برای: extractant carrier properties

تعداد نتایج: 933878  

2007
D. R. Adhikari

The numerical analysis of electrical properties involved in transport mechanism such as carrier concentration, carrier mobility, carrier effective mass, electrical resistivity and electrical conductivity for some rare earth chalcogenides is discussed. The formulae are derived and used to obtain numerical values of these electrical parameters, which are useful to describe the electrical behavior...

Migration of chemicals from plastic containers into drinks and liquids containing them, is supposed to be a hazardous phenomenon and results in many health problems. Sample preparation is of great importance due to trace amounts analysis of these compounds. In this research, dispersive liquid–liquid microextraction is applied for the extraction and preconcentration of the migrated compounds pri...

Journal: :JKPK (Jurnal Kimia dan Pendidikan Kimia) 2021

<p>The PIM-passive sampler is a passive using PIM as diffusion layer. This research aimed to optimize the concentration of plasticizer and phosphate ions in bulk solution produce for measurement with high accuracy. In this study, was made 15 ml glass bottle containing 0.2 M H<sub>2</sub>SO<sub>4</sub> receiving phase membrane. prepared by mixing polyvinyl chloride ...

Journal: :Chemistry methods 2021

We report a simple flow reactor for the selective extraction of target metal ions from an aqueous solution, using passive mixers and liquid-liquid separators. The takes place in two stages. In first stage, are selectively transferred to organic phase containing extractant molecules; and, second acid solution strips regenerates (uncomplexed) molecules, thereby allowing them be recirculated throu...

A new carboxylic acid extractant, named 2-(dibutylcarbamoyl)benzoic acid, is prepared and its potential for selective solvent extraction and recovery of lead ions from industrial samples was investigated. The slope analysis indicated that the lead ions are extracted by formation of 1:2 metal to ligand complexes. The effect of the parameters influencing the extraction efficiency including kind o...

Journal: :Biotechnology progress 2000
J J Malinowski

The downstream separation of 1,3-propanediol from dilute aqueous solution was studied. A process combining reversible reaction of 1, 3-propanediol with acetaldehyde to 2-methyl-1,3-dioxane and a simultaneous extraction of the product by organic solvent appears to be technically feasible and attractive. The dioxane yield was 91-92%, the overall conversion of 1,3-propanediol was ca. 98%, and reco...

Journal: :Solvent Extraction and Ion Exchange 2021

The physicochemical parameters of tris(2-methylbutyl) phosphate (T2MBP), a molecule possessing the essential characteristics required to be considered as promising extractant in solvent extraction stage fast reactor fuel reprocessing, have been evaluated present study. In this context, density, viscosity and interfacial tension (IFT), which are few among important selection criteria prior its d...

Journal: :Physical chemistry chemical physics : PCCP 2008
Juan Bisquert

The carrier transport properties in nanocrystalline semiconductors and organic materials play a key role for modern organic/inorganic devices such as dye-sensitized (DSC) and organic solar cells, organic and hybrid light-emitting diodes (OLEDs), organic field-effect transistors, and electrochemical sensors and displays. Carrier transport in these materials usually occurs by transitions in a bro...

Journal: :Analytical sciences : the international journal of the Japan Society for Analytical Chemistry 2007
Shusuke Oosaki Setsuko Yajima Keiichi Kimura

A liquid-crystalline benzocrown ether, 4'-[(4''-1,1,2,2-tetrahydroperfluorooctyloxy)biphenyloxycarbonyl]benzo-15-crown-5, was used as a neutral carrier of ion-selective electrodes (ISEs) to elucidate the effect of highly ordered assembling of the neutral carrier on the sensor properties through fluorophilic interactions. The properties for the membrane and the resulting ISEs based on a benzocro...

Journal: :Optics letters 1999
C W Siders J L Siders A J Taylor S G Park M R Melloch A M Weiner

The saturation properties of terahertz emission from biased, large-aperture photoconductors excited by trains of amplified femtosecond optical pulses are presented. A direct comparison is made of the multiple-pulse saturation properties of terahertz emission from semi-insulating GaAs and low-temperature-grown GaAs emitters with different carrier lifetimes. When the carrier lifetime is less than...

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