Influence of pressurised liquid extraction and solid-liquid extraction methods on the phenolic content and antioxidant activities of Irish macroalgae

2012 ◽  
Vol 48 (4) ◽  
pp. 860-869 ◽  
Author(s):  
Michelle S. Tierney ◽  
Thomas J. Smyth ◽  
Maria Hayes ◽  
Anna Soler-Vila ◽  
Anna K. Croft ◽  
...  
Keyword(s):  
Phenolic Content ◽  
Antioxidant Activities ◽  
Extraction Methods ◽  
Liquid Extraction ◽  
Pressurised Liquid Extraction ◽  
Solid Liquid Extraction ◽  
Solid Liquid

scholarly journals Comparison between Two Solid-Liquid Extraction Methods for the Recovery of Steviol Glycosides from Dried Stevia Leaves Applying a Numerical Approach

Processes ◽  
2018 ◽  
Vol 6 (8) ◽  
pp. 105 ◽  
Author(s):  
Monica Gallo ◽  
Andrea Formato ◽  
Gaetano Formato ◽  
Daniele Naviglio
Keyword(s):  
Stevia Rebaudiana ◽  
Value Added ◽  
Numerical Approach ◽  
Extraction Process ◽  
Extraction Methods ◽  
Liquid Extraction ◽  
Steviol Glycosides ◽  
Stevia Rebaudiana Bertoni ◽  
Solid Liquid Extraction ◽  
Solid Liquid

Abstract: Stevia rebaudiana Bertoni is a perennial shrub belonging to the Asteraceae family. The leaves contain a mixture of steviol glycosides with extraordinary sweetening properties, among which the most important are stevioside and rebaudioside A. These components have a high sweetening power, which is about 300 times that of sucrose, and a negligible calorie content. However, their extraction and purification are not easy. In this paper, the extraction technique under cyclic pressure, known as rapid solid-liquid dynamic extraction (RSLDE), was compared using a Naviglio extractor (NE) with conventional maceration. The aim was to identify an efficient and economically viable method for obtaining high amounts of steviol glycosides in a short time. Furthermore, a numerical model was set up for the solid-liquid extraction process of value-added compounds from natural sources. Several parameters must be evaluated in relation to the characteristics of the parts of the plant subjected to extraction. Therefore, since diffusion and osmosis are highly dependent on temperature, it is necessary to control the temperature of the extraction system. On the other hand, the final aim of this work was to provide a scientific and quantitative basis for RSLDE. Therefore, the results obtained from stevia extracts using the corresponding mathematical model allowed hypothesizing the application of this model to the extraction processes of other vegetable matrices.

scholarly journals EFFECT OF PRESSURE LIQUID EXTRACTION AND ULTRASONIC IRRADIATION FREQUENCY ON INULIN, PHENOLIC CONTENT AND ANTIOXIDANT ACTIVITY IN BURDOCK (Arctium lappa L.) ROOTS

2020 ◽  
Vol 19 (3) ◽  
pp. 125-133
Author(s):  
Nadezhda Petkova ◽  
Ivan Ivanov ◽  
Dasha Mihaylova ◽  
Anna Lante
Keyword(s):  
Antioxidant Activity ◽  
High Performance ◽  
Phenolic Content ◽  
Antioxidant Activities ◽  
Folk Medicine ◽  
Extraction Methods ◽  
Liquid Extraction ◽  
Arctium Lappa ◽  
Irradiation Frequency ◽  
Ultrasound Assisted

Burdock (Arctium lappa L.) roots are traditionally used in folk medicine as diuretic and curing rheumatism, gastritis, gout, throat pain, arthritis and rashes. These pharmacological properties are due to many bioactive compounds such as flavonoids and fructooligosaccharides. Nowadays, the the application of  “green” methods for extraction of natural compounds gains more and more attention. The object of the current research was to determine inulin and sugars content, phenolic content and antioxidant potential in 70% ethanol and water extracts obtained by two “green“ extraction methods, namely pressure-liquid extraction and ultrasound-assisted techniques. The content of total fructans, as well as inulin and sugars were analyzed by spectrophotometric resorcinol-thiourea method and high-performance liquid chromatography with refractive index detection. Total phenols and flavonoids were determined by Folin-Chiocalteu and Al(NO3)3 reagents. Antioxidant activity was evaluated by four reliable methods (DPPH, ABTS, FRAP and CUPRAC). The established inulin content varied from 0.27 to 4.0 g/100 g dw in prevalence of the ultrasound-assisted extract obtained with water. Additionally, the established phenolic compounds content (from 10.35 to 18.16 mg gallic acid equivalent (GAE)/g dw) and antioxidant activities demonstrated the burdock roots as potential source phytonutrients with health beneficial properties.

Effect of the solid–liquid extraction solvent on the phenolic content and antioxidant activity of three species of Stevia leaves

2018 ◽  
Vol 54 (14) ◽  
pp. 2283-2293 ◽  
Author(s):  
José Roberto Medina-Medrano ◽  
Josselin Estefani Torres-Contreras ◽  
Juan Ignacio Valiente-Banuet ◽  
María Daniela Mares-Quiñones ◽  
Monserrat Vázquez-Sánchez ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Phenolic Content ◽  
Liquid Extraction ◽  
Extraction Solvent ◽  
Solid Liquid Extraction ◽  
Solid Liquid

Rotation planar extraction and medium-pressure solid-liquid extraction of onion (Allium cepa)

2003 ◽  
Vol 16 (1) ◽  
pp. 66-70 ◽  
Author(s):  
Irena Vovk ◽  
Breda Simonovska ◽  
Samo Andrenšek ◽  
Teijo Yrjönen ◽  
Pia Vuorela ◽  
...  
Keyword(s):  
Allium Cepa ◽  
Liquid Extraction ◽  
Medium Pressure ◽  
Solid Liquid Extraction ◽  
Solid Liquid

MASS TRANSFER IN SOLID-LIQUID EXTRACTION AT HIGH SOLUTE CONCENTRATIONS

2018 ◽  
Vol 17 (4) ◽  
pp. 827-839
Author(s):  
Eugenia Teodora Iacob Tudose ◽  
Marcela Popa ◽  
Ioan Mamaliga
Keyword(s):  
Mass Transfer ◽  
Liquid Extraction ◽  
Solid Liquid Extraction ◽  
Solid Liquid

Ultrasound Assisted Solid-Liquid Extraction Devices - Harnessing Active Ingredients from Plant materials – Overview and Analysis

2020 ◽  
Vol 13 ◽  
Author(s):  
Venkatasubramanian Sivakumar
Keyword(s):  
Mass Transfer ◽  
Cell Wall ◽  
Plant Cell ◽  
Plant Cell Wall ◽  
Liquid Extraction ◽  
Active Ingredients ◽  
Plant Materials ◽  
Ultrasound Assisted ◽  
Solid Liquid Extraction ◽  
Solid Liquid

Background: In the growing environmental concern use of natural products, efficient processes and devices are necessary. Solid-Liquid extraction of active Ingredients from Plant materials is one of the important unit operations in Chemical Engineering and need to be enhanced. Objectives: Since, these active ingredients are firmly bound to the plant cell wall membrane, which pose mass-transfer resistance and need to get detached through the use of suitable process intensification tools such as ultrasound and suitable devices. Therefore, detailed analysis and review is essential on development made in this area through Publications and Patents. Hence, the present paper illustrates the development of ultrasound assisted device for solid-liquid extraction are presented in this paper. Methods: Advantages such as % Yield, Reduction in extraction time, use of ambient conditions, better process control, avoidance or minimizing multi stage extraction could be achieved due to the use of ultrasound in extraction as compared to conventional processes. Conclusions: Use of ultrasound to provide significant improvements in the extraction of Vegetable tannins, Natural dyes for application in Leather processing has been demonstrated and reported earlier. These enhancement could be possible through various effects of ultrasound such as better flow of solvents through micro-jet formation, mass transfer enhancement due to rupture of plant cell wall membranes through acoustic cavitation, better leaching due to micro-mixing and acoustic streaming effects. This approach would minimize material wastage; thereby, leading to eco-conservation of plant materials, which is very much essential for better environment. Hence, various methods and design for application of ultrasound assisted solid-liquid extractor device are necessary.

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