The numerical investigation of drop deformation and breakup under simple shear is a basis for theoretical studies of emulsification and mixing. A three-dimensional Couette flow without gravity is considered; the matrix liquid is bounded at the top and bottom by two parallel horizontal plates and the liquid drop is suspended there. The boundaries move horizontally, and generate a simple shear fl...

Horizontal hydraulic transport of ice particles suspended in water which is used in cooling systems has several advantages, such as its friendliness to the environment and its relatively low operation and maintenance costs. In this study, as a first approximation one dimensional model is developed. Simulation model calculates the pressure drop of the flow of solid-water two-phase mixture inside...

In the repeated fractionation of the lipoid constituents of the tubercle bacillus, Anderson"' obtained a substance which he called phthiocerol. This material formed a part of the fraction called the "purified wax," and after separation and purification it was found to be an optically active higher alcohol with the formula C35H7303. At room temperature it is a white crystalline material with a m...

A method for simultaneous determination of nine sulfonylurea herbicides in water and soil samples with solvent demulsification-dispersive liquid-liquid microextraction based on solidification of floating organic drop coupled with high perfomence liquid chromatography was established. 120 μL of 1-dodecanol as extractant and 400 μL of methanol as dispersing reagent were injected into the sample s...

An analytical methodology based in the combination of Thin Film Microextraction with Laser-induced Breakdown Spectroscopy (TFME-LIBS) was investigated, for first time, detection Cu, Cr, Ni and Pb aqueous solutions. In this methodology, analytes were extracted a thin film adsorbent material deposited on solid support, which introduced sample to analyse. After extraction, retained analysed by LIB...

A highly efficient three-phase single drop microextraction (SDME) method is presented by using an organic-aqueous compound droplet. A coupling microdevice is designed to produce compound droplets in different sizes conveniently. In this way, the volume ratio of organic phase to aqueous phase in a compound droplet can be significantly reduced. Good operability and droplet stability were observed...

An in situ single-drop microextraction (SDME) method was developed for trace mercury determination by a miniaturized spectrophotometer, in which a simple and cheap light-emitting diode (LED) was employed as the light source, and a handheld charge coupled device (CCD) was served as the detector. A droplet of 0.006% dithizone-CCl(4) (m/v) was used as extraction phase and hanged on a rolled PTFE t...

A novel method was developed for determination of trace amounts of lead in water and food samples. Solidified floating organic drop microextraction was used to preconcentrate the lead ion. After the analyte was complexed with 1-(2-pyridylazo)-2-naphthol, undecanol and acetonitrile were added as extraction and dispersive solvent, respectively. Variables such as pH, volumes of extraction and disp...