نتایج جستجو برای: phase microextraction

تعداد نتایج: 600074  

2010
A. Fadaei Tehrani D. Karimi S. Amini

There is a huge demand in the production of microstructures by a non-traditional method which is known as Micro-EDM. Micro-EDM process is based on the thermoelectric energy between the workpiece and an electrode. Micro-EDM is a newly developed method to produce micro-parts which in the range of 50 μm -100 μm. Micro-EDM is an efficient machining process for the fabrication of a micro-metal hole ...

Journal: :Computer methods in biomechanics and biomedical engineering 2004
Laurent Pothuaud Bert Van Rietbergen Cindy Charlot Eugene Ozhinsky Sharmila Majumdar

Micro-finite element (FE) analysis is a well established technique for the evaluation of the elastic properties of trabecular bone, but is limited in its application due to the large number of elements that it requires to represent the complex internal structure of the bone. In this paper, we present an alternative FE approach that makes use of a recently developed 3D-Line Skeleton Graph Analys...

K. Motevalli, M. Zeeb

An efficient dispersive liquid-liquid microextraction using tetraalkylammonium bromide coated silver nanoparticles (DLLME-AgNPs) prepared in chloroform has been successfully applied as electrostatic affinity probes to the microextraction and preconcentration of terazosin prior to spectrofluorimetry analysis. This technique is based on a ternary system of solvents, where appropriate amount of mi...

Journal: :Acta poloniae pharmaceutica 2017
Anna Petruczynik Monika Waksmundzka-Hajnos

The review of the RP HPLC analysis of basic psychotropic drugs is presented. It contains sample preparation methods with centrifugation, protein precipitation, liquid-liquid extraction (LLE), dispersive liquid-liquid microextraction (DLLME), solid-phase extraction (SPE), solid-phase microextraction (SPME), microwave-assisted extraction (MAE) and RP-HPLC analysis. Chromatographic behavior of bas...

Journal: :Talanta 2009
Aristidis N Anthemidis Kallirroy-Ioanna G Ioannou

This review aims to provide an overview of homogeneous liquid-liquid extraction (HLLE) and dispersive liquid-liquid microextraction (DLLME) methods and their potential use in inorganic analysis. Relevant applications to the determination of metal ions, metalloids and organometals are included. The phase separation mechanisms of these unconventional solvent extraction techniques are discussed. T...

2013
Hengzhen Li Liming Hu Zhiran Xia

Micro-nano bubbles (MNBs) technology has shown great potential in groundwater bioremediation because of their large specific surface area, negatively charged surface, long stagnation, high oxygen transfer efficiency, etc. Groundwater salinity, which varies from sites due to different geological and environmental conditions, has a strong impact on the bioremediation effect. However, the groundwa...

Journal: :Aquatic toxicology 2012
Chengfang Pang Henriette Selck Superb K Misra Deborah Berhanu Agnieszka Dybowska Eugenia Valsami-Jones Valery E Forbes

Increasing use of engineered nanoparticles (NPs) is likely to result in release of these particles to the aquatic environment where the NPs may eventually accumulate in sediment. However, little is known about the potential ecotoxicity of sediment-associated engineered NPs. We here consider the case of metal oxide NPs using CuO to understand if the effects of NPs differ from micron-sized partic...

Journal: :Lab on a chip 2016
Xiaolin Wang Duc T T Phan Da Zhao Steven C George Christopher C W Hughes Abraham P Lee

Coculturing multiple cell types together in 3-dimensional (3D) cultures better mimics the in vivo microphysiological environment, and has become widely adopted in recent years with the development of organ-on-chip systems. However, a bottleneck in set-up of these devices arises as a result of the delivery of the gel into the microfluidic chip being sensitive to pressure fluctuations, making gel...

Journal: :international journal of nano dimension 0
k. motevalli department of applied chemistry, technical and engineering faculty, islamic azad university, south tehran branch, tehran, iran. m. zeeb department of applied chemistry, technical and engineering faculty, islamic azad university, south tehran branch, tehran, iran.

an efficient dispersive liquid-liquid microextraction using tetraalkylammonium bromide coated silver nanoparticles (dllme-agnps) prepared in chloroform has been successfully applied as electrostatic affinity probes to the microextraction and preconcentration of terazosin prior to spectrofluorimetry analysis. this technique is based on a ternary system of solvents, where appropriate amount of mi...

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