Comparative evaluation of microwave-assisted extraction and preheated solvent extraction of bioactive compounds from a plant material: a case study with cabbages

2016 ◽  
Vol 51 (11) ◽  
pp. 2440-2449 ◽  
Author(s):  
Watsapol Sookjitsumran ◽  
Sakamon Devahastin ◽  
Arun S. Mujumdar ◽  
Naphaporn Chiewchan
Keyword(s):  
Solvent Extraction ◽  
Bioactive Compounds ◽  
Comparative Evaluation ◽  
Plant Material ◽  
Microwave Assisted Extraction ◽  
Microwave Assisted ◽  
Assisted Extraction

scholarly journals Sustainable Biosynthesis of Antioxidants from Koji Rice Fermented with Aspergillus flavus Using Microwave-Assisted Extraction

2021 ◽  
Vol 11 (1) ◽  
pp. 430
Author(s):  
Hassan Hadi Mehdi Al Rubaiy ◽  
Ammar Altemimi ◽  
Ali Khudair Jaber Al Rikabi ◽  
Naoufal Lakhssassi ◽  
Anubhav Pratap-Singh
Keyword(s):  
Ethyl Acetate ◽  
Aspergillus Flavus ◽  
Bioactive Compounds ◽  
Ethylenediaminetetraacetic Acid ◽  
Ethyl Acetate Extract ◽  
Antioxidant Properties ◽  
Antioxidant Compounds ◽  
Microwave Assisted Extraction ◽  
Microwave Assisted ◽  
Assisted Extraction

The present study proposes microwave-assisted extraction as a sustainable technique for the biosynthesis of bioactive compounds from rice fermented with Aspergillus flavus (koji). First, fermentation conditions (i.e., pH from 3–12, five temperatures from 20–40 °C, and four culture-fermentation media viz. wheat, wheat bran, malt and rice) were optimized for producing microbial bioactive compounds. Microwave extraction was performed at 2450 MHz and 500 W for 20, 30, and 40 s with seven solvents (distilled water, ethyl acetate, hexane, ethanol, chloroform, diethyl ether, and methanol). The obtained results revealed that ethyl acetate is the most appropriate solvent for extraction. Effects of this ethyl acetate extract were compared with a commercial synthetic antioxidant. Antioxidant properties were enhanced by preventing the oxidation of the linoleic acid (C18H32O2) with an inhibition rate (antioxidant efficacy) of 73.13%. Notably, the ferrous ion binding ability was marginally lower when compared to the disodium salt of ethylenediaminetetraacetic acid (EDTA). Additionally, the obtained total content of phenolic compounds in the ethyl acetate extract of fermented rice (koji) by Aspergillus flavus was 232.11 mg based on gallic acid/mL. Antioxidant compounds in the ethyl acetate extract of fermented rice showed stability under neutral conditions, as well as at high temperatures reaching 185 °C during 2 h, but were unstable under acidic and alkaline conditions. The results demonstrate the efficacy of novel microwave-assisted extraction technique for accelerating antioxidant production during rice fermentation.

scholarly journals Microwave-Assisted Extraction and Ultrasound-Assisted Extraction of Bioactive Compounds from Grape Pomace

2020 ◽  
Vol 16 (1-2) ◽  
Author(s):  
Cassiano Brown da Rocha ◽  
Caciano Pelayo Zapata Noreña
Keyword(s):  
Antioxidant Activity ◽  
Phenolic Compounds ◽  
Bioactive Compounds ◽  
Grape Pomace ◽  
Total Phenolic ◽  
Microwave Assisted Extraction ◽  
Ultrasound Assisted Extraction ◽  
Microwave Assisted ◽  
Assisted Extraction ◽  
Ultrasound Assisted

AbstractThe grape pomace is a by-product from the industrial processing of grape juice, which can be used as a source of bioactive compounds. The aim of this study was to separate the phenolic compounds from grape pomace using an acidic aqueous solution with 2 % citric acid as a solvent, using both ultrasound-assisted extraction, with powers of 250, 350 and 450 W and times of 5, 10 and 15 min, and microwave-assisted extraction using powers of 600, 800 and 1,000 W and times of 5, 7 and 10 min. The results showed that for both methods of extraction, the contents of total phenolic compounds and antioxidant activity by ABTS and DPPH increased with time, and microwave at 1,000 W for 10 min corresponded to the best extraction condition. However, the contents of phenolic compounds and antioxidant activity were lower than exhaustive extraction using acidified methanol solution.

Optimisation of microwave-assisted extraction from Phyllanthus amarus for phenolic compounds-enriched extracts and antioxidant capacity

2016 ◽  
Vol 70 (6) ◽  
Author(s):  
Van T. Nguyen ◽  
Michael C. Bowyer ◽  
Ian A. van Altena ◽  
Christopher J. Scarlett
Keyword(s):  
Phenolic Compounds ◽  
Antioxidant Capacity ◽  
Bioactive Compounds ◽  
Pharmacological Activity ◽  
Extraction Efficiency ◽  
Phyllanthus Amarus ◽  
Microwave Assisted Extraction ◽  
Microwave Assisted ◽  
Assisted Extraction ◽  
Extraction Parameters

Abstractis known as a healing herb which has traditionally been used in the treatment of various diseases such as hepatitis, diabetes and cancer. The extraction parameters have great effects on the extraction efficiency of bioactive compounds and pharmacological activity of the extracts. This study sought to optimise the microwave-assisted extraction parameters for phenolic compounds-enriched extracts and antioxidant capacity from

Optimization of microwave-assisted extraction recovery of bioactive compounds from Origanum glandulosum and Thymus fontanesii

2019 ◽  
Vol 129 ◽  
pp. 395-404 ◽  
Author(s):  
Nacim Nabet ◽  
Bienvenida Gilbert-López ◽  
Khodir Madani ◽  
Miguel Herrero ◽  
Elena Ibáñez ◽  
...  
Keyword(s):  
Bioactive Compounds ◽  
Microwave Assisted Extraction ◽  
Extraction Recovery ◽  
Microwave Assisted ◽  
Assisted Extraction

scholarly journals Microwave-Assisted Extraction and Accelerated Solvent Extraction with Ethyl Acetate–Cyclohexane before Determination of Organochlorines in Fish Tissue by Gas Chromatography with Electron-Capture Detection

2000 ◽  
Vol 83 (6) ◽  
pp. 1334-1344 ◽  
Author(s):  
Marion Weichbrodt ◽  
Walter Vetter ◽  
Bernd Luckas
Keyword(s):  
Solvent Extraction ◽  
Fish Tissue ◽  
Solvent Mixture ◽  
Organochlorine Compounds ◽  
Water Removal ◽  
Microwave Assisted Extraction ◽  
Microwave Assisted ◽  
Assisted Extraction ◽  
Quantitative Extraction

Abstract Focused open-vessel microwave-assisted extraction (FOV–MAE), closed-vessel microwave-assisted extraction (CV–MAE), and accelerated solvent extraction (ASE) were used for extraction before determination of organochlorine compounds (polychlorinated biphenyls, DDT, toxaphene, chlordane, hexachlorobenzene, hexachlorocyclohexanes, and dieldrin) in cod liver and fish fillets. Wet samples were extracted without the time-consuming step of lyophilization or other sample-drying procedures. Extractions were performed with the solvent mixture ethyl acetate–cyclohexane (1 + 1, v/v), which allowed direct use of gel-permeation chromatography without solvent exchange. For FOV–MAE, the solvent mixture removed water from the sample matrix via azeotropic distillation. The status of water removal was controlled during extraction by measuring the temperature of the distillate. After water removal, the temperature of the distillate increased and the solvent mixture became less polar. Only the pure extraction solvent allowed quantitative extraction of the organochlorine compounds. For CV–MAE, water could not be separated during the extraction. For this reason, the extraction procedure for wet fish tissue required 2 extraction steps: the first for manual removal of coextracted water, and the second for quantitative extraction of the organochlorine compounds with the pure solvent. Therefore, CV–MAE is less convenient for samples with high water content. For ASE, water in the sample was bound with Na2SO4. The reproducibility for each technique was very good (relative standard deviation was typically <10%); the slightly varying levels were attributed to deviations during sample cleanup and the generally low levels.

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