نتایج جستجو برای: ultrasound microwave supercritical fluid soxhlet

تعداد نتایج: 384203  

Journal: :Seikei-Kakou 2012

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه سیستان و بلوچستان 1390

a one dimensional dynamic model for a riser reactor in a fluidized bed catalytic cracking unit (fccu) for gasoil feed has been developed in two distinct conditions, one for industrial fccu and another for fccu using various frequencies of microwave energy spaced at the height of the riser reactor (fccu-mw). in addition, in order to increase the accuracy of component and bulk diffusion, instanta...

The axial dispersion coefficient of hexachlorobenzene in supercritical carbon dioxide is investigated in a fixed-bed packed with glass beads. The on-line chromatographic pulse-response experiment is used in order to study the dynamics of a packed column under supercritical conditions. The radial dispersion is assumed negligible because of the packed column geometry. To estimate the axial disper...

2013
Sujuan Pan Junbo Zhou Haiting Li Can Quan

Supercritical fluid extraction and expansion (SFEE) patented technology combines the advantages of both supercritical fluid extraction (SFE) and rapid expansion of supercritical solution (RESS) with on-line coupling, which makes the nanoparticle formation feasible directly from matrix such as Chinese herbal medicine. Supercritical fluid extraction is a green separation technology, which has bee...

Journal: :Ultrasonics sonochemistry 2008
Giancarlo Cravotto Luisa Boffa Stefano Mantegna Patrizia Perego Milvio Avogadro Pedro Cintas

Ultrasound-assisted extraction (UAE) and microwave-assisted extraction (MAE) techniques have been employed as complementary techniques to extract oils from vegetable sources, viz, soybean germ and a cultivated marine microalga rich in docosahexaenoic acid (DHA). Ultrasound (US) devices developed by ourselves, working at several frequencies (19, 25, 40 and 300 kHz), were used for US-based protoc...

Journal: :Resources 2023

In this study, solid olive mill waste (SOMW) was used to obtain antioxidant compounds using solid–liquid extraction. The effect of different extraction methods, namely microwave-assisted (MAE), ultrasound-assisted (UAE), Soxhlet, and conventional solvent extraction, on the yield, total phenolics, activity SOMW extracts investigated. Untreated dried were subjected with water methanol. evaluated ...

Journal: :پژوهش های علوم و صنایع غذایی ایران 0
mahdi barmour jalal dehghannya babak ghanbarzadeh

the objective of this study was to evaluate the effect of process conditions and different pretreatments including ultrasound, microwave and osmotic dehydration on mass transfer and oil uptake during deep fat frying of potato slices. ultrasound pretreatment was performed at frequency of 40 khz for 10 and 30 minutes, microwave pretreatment was conducted at 5 w/g power and osmotic dehydration pre...

2017
Markus Armbruster Rolf Daniels Martin A. Wahl

Triterpene compounds like betulin, betulinic acid, erythrodiol, oleanolic acid and lupeol are known for many pharmacological effects. All these substances are found in the outer bark of birch. Apart from its pharmacological effects, birch bark extract can be used to stabilise semisolid systems. Normally, birch bark extract is produced for this purpose by extraction with organic solvents. Employ...

Journal: :Journal of physics 2021

Abstract India is the largest fruit and vegetable producer. Until eaten, peel stays waste. Phenolic acids, ascorbic acid, β-carotenes, flavonoids are most bioactive components of pineapples. This one secondary plant metabolites abundantly present in pineapple skins this sample, ferulic acid. Ferulic acid a low-toxic phenolic widely used diet cosmetics. extracted using different conventional non...

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