Investigation of the effects of ultrasound on vegetal tissues during solvent extraction

Toma, Maricela; Vînătoru, Mircea; Paniwnyk, Larysa; Mason, Timothy J.

doi:10.1016/s1350-4177(00)00033-x

Cited by 528 publications

(282 citation statements)

References 8 publications

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“…Ultrasonically Assisted Extraction For any ultrasonically assisted process the sonication time is an important parameter that affects significantly the overall extraction cost as the sonicator is a highly energy consuming tool 16) . To investigate the influence of the ultrasonic exposure time on extraction efficiency, the extraction mixture was sonicated for 3 different periods of time: 5 min, 10 min and 15 min.…”

Section: T H E E F F E C T O F E X P O S U R E T I M E O N T H Ementioning

confidence: 99%

Solvent Extraction of Bitumen from Jordan Oil Shale Assisted by Low Frequency Ultrasound

Matouq

Koda

Toma

et al. 2009

J. Jpn. Petrol. Inst.

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In this work, the efficiency of 20 kHz frequency ultrasounds versus the classical stirring procedure was investigated on the solvent extraction of Jordanian El-Lajjun oil shale by employing a horn type sonicator. The influence of sonication parameters (sonication time and ultrasonic power) and extraction parameters (extraction solvent and oil shale particle size) on the solubilization of organic matter (bitumen) from oil shale are reported here. The influence of seven individual solvents, namely: tetrahydrofuran, benzene, carbon tetrachloride, chloroform, kerosene, toluene, acetone and a mixture of methanol _ acetone _ chloroform on the fraction extracted was investigated and it was found that the fraction extracted was 90％ after only ten minutes of sonication at 33 W when tetrahydrofuran was used as extraction solvent. It was found that the fraction extracted percentage is strongly influenced by the solvent extraction, ultrasonic power and exposure time and less influenced by the particle size. Under the current experimental conditions and using the tetrahydrofuran as extraction solvent, the extraction time was decreased by four folds while the fraction extracted percentage (E％) was increased by three times.

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Section: T H E E F F E C T O F E X P O S U R E T I M E O N T H Ementioning

confidence: 99%

Solvent Extraction of Bitumen from Jordan Oil Shale Assisted by Low Frequency Ultrasound

Matouq

Koda

Toma

et al. 2009

J. Jpn. Petrol. Inst.

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“…As shown in Figure 1D, phenolic yield increased from the minimum (6840.00 mg GAE/100 g d.w.) at 30 °C to the maximum (7376.17) at 50 °C, decreased to 6890.21 at 60 °C, then slightly increased up to 80 °C thereafter with no significant differences between 60 and 80 °C. These results suggest that a relative high temperature increased phenolic extraction efficiency as it increased the number of cavitation nucleus formed [38], leading an enhanced mass transfer and therefore a better access of solvent to cell components [39]. However, this increase declined, namely, brought a negative effect on the efficiency when the temperature exceeded a certain value.…”

Section: Extraction Temperaturementioning

confidence: 90%

“…The possible interaction mechanism between temperature and power may be the change of cavitation threshold affected by changing temperature, which is responsible for acoustic cavitation and also results in the formation of a cavitational nucleus. The influence of relatively greater forces ruptures and erupts the formed cavitational nucleus and disrupts the cell tissues during extraction, which in turn enhances the mass transfer rate [39].…”

Section: Effect Of Interactions Among Variables On Phenolic Yield Andmentioning

confidence: 99%

Optimization of Ultrasonic-Assisted Extraction by Response Surface Methodology with Maximal Phenolic Yield and Antioxidant Activity from <em>Acer truncatum</em> Leaves

Yang

Yin

Fan

et al. 2017

Preprint

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This study was designed for the first time to improve phenolic yield and antioxidant activity of ultrasonic-assisted extraction from Acer truncatum leaves (ATL) using response surface methodology, and phenolic composition in ATL extracted under the optimized condition were characterized by UPLC-QTOF-MS/MS. Solvent and extraction time were selected based on preliminary experiments, and a four-factors-three-levels central composite design was conducted to optimize solvent concentration (X1), material-to-liquid ratio (X2), ultrasonic temperature (X3) and power (X4) for an optimal total phenol yield (Y1) and DPPH• antioxidant activity (Y2). The results showed that the optimal combination was ethanol: water (v:v) 66.21%, material-to-liquid ratio 1:15.31 g/mL, ultrasonic temperature 60 °C, power 267.30 W, and time 30 min with three extractions, giving a maximal total phenol yield of 7593.62 mg gallic acid equivalent /100 g d.w. and a maximal DPPH• antioxidant activity of 74241.61 μmol Trolox equivalent/100 g d.w.. Furthermore, 22 phenolics were first identified in ATL extract obtained under the optimized conditions, indicating that gallates, gallotannins, quercetin, myricetin and chlorogenic acid derivatives were the main phenolic composition in ATL. What's more, a gallotannins pathway existing in ATL from gallic acid to penta-O-galloyl-glucoside was interpreted. All these results provided practical information aiming at full utilization of phenolics in ATL, together with fundamental knowledge for further research.

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“…This allows an enhanced penetration of solvent into the sample matrix. Thereby, the contact area between the solid and liquid phase is increased and thus a higher mass transfer of the target compound toward the solvent occurs [93][94][95]. Moreover, ultrasounds can improve the extraction yield by increasing the net hydrophobic character of the extraction medium (when the target molecule is non-polar) and reducing the particle size [96].…”

Section: Ultrasounds Assisted Extraction Of Alkaloids From Potato Peelmentioning

confidence: 99%

Processing, Valorization and Application of Bio-Waste Derived Compounds from Potato, Tomato, Olive and Cereals: A Review

Fritsch

Stäbler

Happel³

et al. 2017

Sustainability

138

102

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Abstract:The vast and ever-growing amount of agricultural and food wastes has become a major concern throughout the whole world. Therefore, strategies for their processing and value-added reuse are needed to enable a sustainable utilization of feedstocks and reduce the environmental burden. By-products of potato, tomato, cereals and olive arise in significant amounts in European countries and are consequently of high relevance. Due to their composition with various beneficial ingredients, the waste products can be valorized by different techniques leading to economic and environmental advantages. This paper focuses on the waste generation during industrial processing of potato, tomato, cereals and olives within the European Union and reviews state-of-the-art technologies for their valorization. Furthermore, current applications, future perspectives and challenges are discussed.

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Investigation of the effects of ultrasound on vegetal tissues during solvent extraction

Cited by 528 publications

References 8 publications

Solvent Extraction of Bitumen from Jordan Oil Shale Assisted by Low Frequency Ultrasound

Solvent Extraction of Bitumen from Jordan Oil Shale Assisted by Low Frequency Ultrasound

Optimization of Ultrasonic-Assisted Extraction by Response Surface Methodology with Maximal Phenolic Yield and Antioxidant Activity from <em>Acer truncatum</em> Leaves

Processing, Valorization and Application of Bio-Waste Derived Compounds from Potato, Tomato, Olive and Cereals: A Review

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