Results 21 to 30 of about 62,631 (288)

Optimizing a sustainable ultrasound assisted extraction method for the recovery of polyphenols from lemon by-products:comparison with hot water and organic solvent extractions [PDF]

open access: yes, 2018
Response surface methodology (RSM) based on a three-factor and three-level Box–Behnken design was employed for optimizing the aqueous ultrasound-assisted extraction (AUAE) conditions, including extraction time (35–45 min), extraction temperature (45–55 ...
Bowyer, Michael C.   +6 more
core   +2 more sources

Optimization of Response Surface for Ultrasonic Acid Extraction of Pectin from Passion Fruit Peel and Its Antioxidant Activity

open access: yesShipin gongye ke-ji, 2022
In order to further realize the waste utilization of PFP and reduce the waste of resources and environmental pollution, PFP pectin was extracted by ultrasonic assisted acid method and its antioxidant activity was studied.
Jinxiu WANG   +4 more
doaj   +1 more source

Screening the effect of four ultrasound-assisted extraction parameters on hesperidin and phenolic acid content of aqueous citrus pomace extracts [PDF]

open access: yes, 2018
Polyphenols of citrus by-products, due to their antioxidant and antimicrobial activities, could be valorized by pharmaceutical and food industries, adding a value to the citrus processing companies.
Bowyer, Michael C.   +6 more
core   +2 more sources

Comparison of efficiency of vibromagnetic and ultrasonic methods of organic compounds extraction from sapropel in the water environment [PDF]

open access: yes, 2018
The aim of this investigation was to compare the influence of aqueous vibromagnetic-assisted and ultrasonic-assisted extraction on the qualitative and quantitative composition of the fatty acids (FA) obtained from the sapropel of Karasevoye lake (Russia,
Коршиков, В. А.
core   +2 more sources

Binary solvent extraction system and extraction time effects on phenolic antioxidants from kenaf seeds (Hibiscus cannabinus L.) extracted by a pulsed ultrasonic-assisted extraction [PDF]

open access: yes, 2014
The aim of this study was to determine the best parameter for extracting phenolic-enriched kenaf (Hibiscus cannabinus L.) seeds by a pulsed ultrasonic-assisted extraction.
Lau, Hwee Wen   +4 more
core   +3 more sources

Sequential Combination of Microwave- and Ultrasound-Assisted Extraction of Total Flavonoids from Osmanthus fragrans Lour. Flowers

open access: yesMolecules, 2017
Microwave-assisted and ultrasound-assisted extraction assays were used to isolate total flavonoids (TF) from Osmanthus fragrans flowers. The effects of the solid-liquid ratio, ethanol concentration, microwave power, microwave extraction time, ultrasonic ...
Jianfeng Yu   +4 more
doaj   +1 more source

Optimization of β-cyclodextrin-based extraction of antioxidant and anti-browning activities from thyme leaves by response surface methodology [PDF]

open access: yes, 2018
Thyme (Thymus vulgaris) has been demonstrated to extend the shelf-life of food products, being also a potential source of bioactive compounds. The aim of this research was to optimize the ultrasound assisted extraction employing β-cyclodextrin aqueous ...
Buera, Maria del Pilar   +4 more
core   +1 more source

Ultrasonically assisted acid extraction of manganese from slag

open access: yesUltrasonics Sonochemistry, 2008
An ultrasonically assisted extraction (UAE) technique was developed for the extraction of manganese from electrolytic manganese slag using a sulfuric acid-hydrochloric acid mixture (4:0.3, v/v) as solvent. The UAE conditions were optimized and the significance of variables affecting UAE tested.
Hui, Li   +4 more
openaire   +2 more sources

The efficiency of ultrasonic-assisted extraction of cyanocobalamin is greater than heat extraction [PDF]

open access: yesHeliyon, 2020
Cyanocobalamin, like other water-soluble vitamins, is susceptible to degradation due to exposure to heat, UV, oxygen and pH. Built on our previous finding, this study aimed to assess the extraction efficiency of cyanocobalamin from dietary supplements. Particularly, cyanocobalamin extraction in a 100 °C water bath was compared with ultrasonic-assisted ...
Chandra-Hioe, MV, Xu, H, Arcot, J
openaire   +4 more sources

The effect of ultrasound pretreatment on some selected physicochemical properties of black cumin (Nigella Sativa) [PDF]

open access: yes, 2018
Background In the present study, the effects of ultrasound pretreatment parameters including irradiation time and power on the quantity of the extracted phenolic compounds quantity as well as on some selected physicochemical properties ...
A Jiménez   +42 more
core   +1 more source

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