Microwave-Assisted Extraction of Bioactive Compounds (Review)

Oluwaseun, Alara Ruth; Nour, A. H.; Omer, Manal Suliman; Ahmed, Noormazlinah

doi:10.5772/intechopen.96092

Cited by 24 publications

(15 citation statements)

References 78 publications

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“…The MAE is one of the modern extraction methods that has received much patronage due to several merits such as a reduction in utilization of solvents, enhanced yield recovery, better selectivity, reproducibility, reduced operation time, and less sample manipulation Nour et al, 2021). MAE utilizes microwave energy for faster heating which results from a range of electromagnetic spectrums of light (300 MHz to 300 GHz) with short wavelengths usually between 1 cm −1 and 1 m −1 .…”

Section: Methanol Leavesmentioning

confidence: 99%

Nutritional, functional, and bioactive properties of african underutilized legumes

et al. 2023

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Globally, legumes are vital constituents of diet and perform critical roles in maintaining well-being owing to the dense nutritional contents and functional properties of their seeds. While much emphasis has been placed on the major grain legumes over the years, the neglected and underutilized legumes (NULs) are gaining significant recognition as probable crops to alleviate malnutrition and give a boost to food security in Africa. Consumption of these underutilized legumes has been associated with several health-promoting benefits and can be utilized as functional foods due to their rich dietary fibers, vitamins, polyunsaturated fatty acids (PUFAs), proteins/essential amino acids, micro-nutrients, and bioactive compounds. Despite the plethora of nutritional benefits, the underutilized legumes have not received much research attention compared to common mainstream grain legumes, thus hindering their adoption and utilization. Consequently, research efforts geared toward improvement, utilization, and incorporation into mainstream agriculture in Africa are more convincing than ever. This work reviews some selected NULs of Africa (Adzuki beans (Vigna angularis), African yam bean (Sphenostylis stenocarpa), Bambara groundnut (Vigna subterranea), Jack bean (Canavalia ensiformis), Kidney bean (Phaseolus vulgaris), Lima bean (Phaseolus lunatus), Marama bean (Tylosema esculentum), Mung bean, (Vigna radiata), Rice bean (Vigna Umbellata), and Winged bean (Psophocarpus tetragonolobus)), and their nutritional, and functional properties. Furthermore, we highlight the prospects and current challenges associated with the utilization of the NULs and discusses the strategies to facilitate their exploitation as not only sources of vital nutrients, but also their integration for the development of cheap and accessible functional foods.

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Section: Methanol Leavesmentioning

confidence: 99%

Nutritional, functional, and bioactive properties of african underutilized legumes

et al. 2023

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“…The fact that the extracts from untreated SOMW samples exhibited the highest yield for both water and methanol indicates that moisture works in conjunction with polar solvents, thus enhancing the extraction of the desirable compounds [37]. Moreover, high EYs The fact that the extracts from untreated SOMW samples exhibited the highest yield for both water and methanol indicates that moisture works in conjunction with polar solvents, thus enhancing the extraction of the desirable compounds [37]. Moreover, high EYs were observed for both solvents after 10 min of extraction, proving that both solvents could penetrate and recover the bioactive compounds in reduced times.…”

Section: Ultrasound-assisted Extraction (Uae)mentioning

confidence: 99%

The Recovery of Bioactive Compounds from Olive Pomace Using Green Extraction Processes

et al. 2023

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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 extraction (MAE), ultrasound-assisted extraction (UAE), Soxhlet, and conventional solvent extraction, on the yield, total phenolics, and total antioxidant activity of SOMW extracts was investigated. Untreated and dried SOMW were subjected to extraction with water and methanol. The antioxidant activity of the extracts was evaluated using the DPPH assay, while their total phenolic content was measured using the Folin–Ciocalteu method. For the characterisation of the extracts, HPLC-DAD analysis was performed. The results showed that the extraction yield was significantly influenced (p < 0.05) by the solvent used, the material treatment prior to extraction, the moisture content of SOMW samples, and the extraction time. The optimised parameters were water, as the extraction solvent, and MAE as the extraction technique (extraction temperature of 50 °C and time of 1 h). The evaluation of the antioxidant activity of the extracts indicated that phenolics were the dominant bioactive compounds. The extracts were found to be rich in several hydroxytyrosol derivatives. Therefore, SOMW can be a valuable resource for bioactive compounds using conventional and innovative extraction techniques.

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“…Electromagnetic energy causes the evaporation of water from the plant's matrix, causing a considerable pressure and the deformation of the cellular and subcellular walls. This deformation brings structural changes in the plant matrix, thus generating an increased mass transfer of dissolved substances as a result of cell destruction, and thus facilitating the extraction of tannins from the plant cell matrix [5][6][7]. Figure 5 shows a significant interaction effect on the extraction of catechin from spinosa branches.…”

Section: Figurementioning

confidence: 99%

“…Large samples or aggregated small particles cannot be heated uniformly. Also, a cooling time is necessary after MAE [5][6][7]. Yingngam et al showed that the MAE process accelerates the mass transfer rate and improves the extraction yield of triterpenes from leaves of C. asiatica, while consuming less solvent [8].…”

Section: Introductionmentioning

confidence: 99%

Microwave-Assisted Extraction of Condensed Tannins from Branches of Prunus spinosa L.: Response Surface Modeling and Optimization

et al. 2023

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The present study was conducted in order to investigate the parameters influencing the extraction of condensed tannins from branches of Prunus spinosa L. as a source of biomass, using a two-level factorial design. The extraction of condensed tannins was performed using microwave assisted-extraction (MAE)—a green technique to produce concentrated and pure extracts. Experimental tests were run to establish the effects of independent variables on the extraction of condensed tannins (expressed as catechin and epicatechin), which were quantified using high-performance thin-layer chromatography–densitometry. Four process variables were evaluated: ethanolic solvent concentration (% v/v) (30, 70), liquid-to-solid ratio (mL/g) (6:1, 10:1), extraction time (min) (2, 5) and microwave power (W) (400, 600). The significant influencing parameters were liquid-to-solid ratio and solvent concentration. The maximum content of condensed tannins (3.4 mg g−1 catechin and 3.45 mg g−1 epicatechin) was obtained using 70% v/v ethanol, 10:1 liquid-to-solid ratio, 5 min of extraction time and 600 W microwave power. MAE is beneficial for increasing the amounts of the targeted compounds.

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Microwave-Assisted Extraction of Bioactive Compounds (Review)

Cited by 24 publications

References 78 publications

Nutritional, functional, and bioactive properties of african underutilized legumes

Nutritional, functional, and bioactive properties of african underutilized legumes

The Recovery of Bioactive Compounds from Olive Pomace Using Green Extraction Processes

Microwave-Assisted Extraction of Condensed Tannins from Branches of Prunus spinosa L.: Response Surface Modeling and Optimization

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