Ultrasound-assisted extraction is evaluated as a simpler and more effective alternative to conventional extraction methods for the extraction of bioactive compounds from natural product. This study investigated the use of ultrasound-assisted extraction to extract three dibenzylbutyrolactone lignans, including tracheloside, hemislienoside, and arctiin from Hemistepta lyrata. Factors such as extr...

The global interest on microwave assisted chemistry (MAC) is due to the important benefits for sustainable growth of green chemical industries and environmentally friendly progress society. MAC has been firstly developed using oven-type microwaves (MWs) reactors, which requires difficult expensive industrial scale-up. In 2002, development coaxial dipole antenna allowed a direct application MWs ...

A procedure was evaluated for the extraction of 16 free fatty acids (FFAs) from liver. Ultrasonic energy was used for the extraction and the variables affecting the extraction efficiency were investigated. The best conditions for extraction were: 2 mL isopropanol-n-hexane (3:2, v/v), 20 min and 80 w. Recoveries ranging from 87.00 to 120.00% were obtained under the optimum conditions, and the li...

-This study demonstrated techniques for visualization of detailed brain anatomy with two dimensional ultrasound. The use of large aperture focused ultrasound transceivers appears to be essential for displaying the outlines of thalamus, internal capsule and substantial nigra in addition to those of the ventricles. The ability to vary grey scale and edge enhancement using either linear or logarit...

Pyrolysis oil derived from waste tires consists of sulfur content in the range 7000 to 9000 ppm. For use diesel engines, its must be lowered 10 15 Though conventional hydrodesulfurization is suitable for removal tire pyrolysis oil, high cost provides an avenue alternative desulfurization technologies explored. In this study, oxidative (ODS), a low-cost technology, was explored oil. Two categori...

Catalytic oxidative desulfurization (ODS) of fuel oils is considered one the most promising non-hydrodesulfurization technologies due to advantages mild reaction conditions, low cost and easy removal aromatic sulfur compounds. Based on this reason, preparation highly efficient ODS catalysts has been a hot research topic in field. Recently, metal-organic frameworks (MOFs) have attracted extensiv...

Abstract Ultrasound-assisted chalcopyrite leaching has been reported previously, showing a noticeable improvement in kinetics. However, the effect of ultrasound on oxidation kinetics from an electrochemical perspective not addressed. This study examines ultrasonic enhancement sulfuric acid solution both conventional and electrochemistry aspects. Electrochemical techniques, including linear swee...