Quercetin is a biological flavonoid, which can be found in red kidney bean at high concentration. In this study, a comparison was conducted between traditional and modern extraction methods. Sequential microwave-assisted extraction was used for isolation of quercetin from red kidney bean. The effect of several factors such as particle size of grinded kidney bean, extraction solvent, microwave p...

For the quantitative analysis of phthalates in polymers, a thermal desorption (TD)-GC-MS method was compared with solvent extraction (SE)-GC-MS methods which require the long pretreatment procedures using large amount of harmful organic solvents. Calibration curves of TD-GC-MS showed good linearity (r(2)>0.9997) and low method detection limit (<30mg/kg with 9.0% RSD). Quantification results for...

ber af problems fer nnr instantaneously While solvent-assisted emulsion systems have met with a degree of success in formulating pressure sensitive adhesives, they have several disadvantages. The solvent content of these systems precludes totally solvent-free adhesives. Also. there is reported evidence that surfactants used to stabilize the emulsion can adversely affect tack properties of the f...

Key features of the deep eutectic solvent-microwave assisted simultaneous extraction polyphenols and delignification pretreatment chestnut shell waste are presented.

Abstract Viscosity is the resistance of a material to continuous deformation exerted by shear force. High viscosity, which sometimes greater than 1 million mPa s, at initial reservoir conditions, major challenge recovery, production, and transportation bitumen. Addition organic solvents or diluents with bitumen leads significant viscosity reduction forms basis for steam/solvent-assisted recover...

This paper introduces a new chemically-assisted mechanical refrigeration system that combines the advantages of the vapor compression, vapor absorption, and refrigeration/solvent resorption systems. Principles of the new system are presented and the search for suitable refrigerant/solvent pairs for the system is discussed. The feasibility of the proposed system has been verified by a sample cal...