scholarly journals Application And Comparison Of Different Extraction Methods of capsaicin from chili, Capsicum annuum L.

2016 ◽  
Vol 19 (2) ◽  
pp. 44-51
Author(s):  
Khoa Anh Tran ◽  
Tuyet Thi Ngoc Nguyen ◽  
Phung Thi Kim Le
Keyword(s):  
Carbon Dioxide ◽  
Fatty Acids ◽  
Extraction Method ◽  
Extraction Methods ◽  
Microwave Assisted Extraction ◽  
Ultrasound Assisted Extraction ◽  
Microwave Assisted ◽  
Assisted Extraction ◽  
Ultrasound Assisted ◽  
Main Component

The extraction of chili oil and capsaicin from chili using some different method such as Soxhlet, maceration, ultrasound-assisted extraction, microwave-assisted extraction and supercritical carbon dioxide with ethanol as a modifier was studied in this work. The results showed that the main component of chili oil is polyunsaturated fatty acids (representing 77.4%); mainly oleic acid and linoleic acid. The highest yield of oil and capsaicin were 0,5358g/g and 2,9534mg/g material; achieved from microwave-assisted extraction method. However, the highest selectivity was 1.77% with supercritical fluid extraction method. With additional co-solvent, the concentration of capsaicin increased but the selectivity decreased.

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.

scholarly journals Polyphenolic-Protein-Polysaccharide Complexes from Hovenia dulcis: Insights into Extraction Methods on Their Physicochemical Properties and In Vitro Bioactivities

Foods ◽  
2020 ◽  
Vol 9 (4) ◽  
pp. 456 ◽  
Author(s):  
Ding-Tao Wu ◽  
Wen Liu ◽  
Mei-Lin Xian ◽  
Gang Du ◽  
Xin Liu ◽  
...  
Keyword(s):  
Physicochemical Properties ◽  
Antioxidant Activities ◽  
Extraction Methods ◽  
Water Extraction ◽  
Microwave Assisted Extraction ◽  
Microwave Assisted ◽  
Assisted Extraction ◽  
Ultrasound Assisted ◽  
Hovenia Dulcis

Seven extraction methods, including hot water extraction (HWE), pressurized water extraction (PWE), ultrasound-assisted extraction, microwave-assisted extraction, ultrasound-assisted enzymatic extraction, high-speed shearing homogenization extraction, and ultrasound-microwave-assisted extraction, were utilized to extract polyphenolic-protein-polysaccharide complexes (PPPs) from Hovenia dulcis. Next, their physicochemical properties and in vitro antioxidant activities, antiglycation effects, and inhibition activities on α-glucosidase and α-amylase were studied and compared. The findings from this study indicate that various extraction processes exhibit notable influences on the physicochemical properties and in vitro bioactivities of PPPs. Extraction yields, contents of polyphenolics and flavonoids, apparent viscosities, molecular weights, molar ratios of monosaccharide compositions, and ratios of amino acid compositions in PPPs varied in different extraction methods. Furthermore, 13 phenolic compounds in PPPs, including rutin, myricitrin, myricetin, quercetin, kaempferol, protocatechuic acid, gallocatechin, p-hydroxybenzoic acid, ampelopsin, quercetin-7,4′-diglucoside, dihydroquercetin, 5-methylmyricetin, and naringenin, were identified. The relatively strong in vitro antioxidant activities, antiglycation effects, and inhibition activities on α-glucosidase and α-amylase were determined in both PPP-W and PPP-P obtained by HWE and PWE, respectively. The high content of total polyphenolics may be one of the main contributors to their in vitro bioactivities. The findings have shown that the PWE method can be an appropriate method to prepare PPPs with strong bioactivities for application in the functional food industry.

scholarly journals Simultaneous Determination of REEs in Coal Samples Using the Combination of Microwave-Assisted Ashing and Ultrasound-Assisted Extraction Methods Followed by ICP-OES Analysis

Minerals ◽  
2021 ◽  
Vol 11 (10) ◽  
pp. 1103
Author(s):  
Mceliseni Zuma ◽  
Philiswa Nomngongo ◽  
Nomvano Mketo
Keyword(s):  
Inductively Coupled Plasma ◽  
Bath Temperature ◽  
Extraction Methods ◽  
Icp Oes ◽  
Ultrasound Assisted Extraction ◽  
Microwave Assisted ◽  
Ultrasonic Bath ◽  
Assisted Extraction ◽  
Ultrasound Assisted

The world during the COVID-19 pandemic has led to extensive use of virtual activities by means of electronic devices, which are made up of rare earth elements (REEs). This means that quantitative knowledge of REEs in various resources is crucial for the development of effective recovery methods. Therefore, this report describes a simple microwave assisted ashing followed by ultrasound-assisted extraction (MAA-UAE) for quantitative determination of REEs in coal samples using inductively coupled plasma-optical emission spectroscopy (ICP-OES). Firstly, coal samples were ashed at 55 °C for 4.5 h to form white ashes, which were then treated with dilute HNO3 acid under ultrasonication to enhance the extraction of REEs. The quantitative recoveries (86–120%) of REEs were obtained when 1 mol L−1, 0.1 g, 40 °C, 20 min, and high frequency were applied for [HNO3], sample mass, ultrasonic bath temperature, extraction time, and ultrasonic bath frequency, respectively. The method detection limits of the proposed MAA-UAE method were between 0.0075 and 0.59 µg g−1 with satisfactory precision (<5%). The concentration levels of REEs in South African coals ranged from 1.4 to 105 µg g−1, suggesting that this coal can be a resource for REEs.

scholarly journals Ziziphus lotus (L.) Lam. plant treatment by ultrasounds and microwaves to improve antioxidants yield and quality: An overview

2021 ◽  
Vol 5 (12) ◽  
pp. 53-68
Author(s):  
Farida Berkani ◽  
Maria Luísa Serralheiro ◽  
Farid Dahmoune ◽  
Malik Mahdjoub ◽  
Nabil Kadri ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Extraction Yield ◽  
Point Of View ◽  
Microwave Assisted Extraction ◽  
Ultrasound Assisted Extraction ◽  
Microwave Assisted ◽  
Yield And Quality ◽  
Assisted Extraction ◽  
Industrialization Process ◽  
Ultrasound Assisted

The purpose of this review is to compile the literature published about different aspects of microwave-assisted extraction (MAE) use and ultrasound-assisted extraction (UAE) applied on jujube worldwide and to compare the results on the antioxidant activity obtained for each extraction method. As a result of the increased consumers demand for natural products, as well as for those of agro-food, nutraceutical, cosmetic industries, and green extraction techniques are nowadays trending to be potential alternatives that can improve antioxidant yield and its quality from an economical and environmental point of view by reducing time, energy, and solvent consumption. Ultrasounds and microwaves are widely used methods in the extraction of active principles due to their cavitation and dipolar rotation effect, respectively. These two techniques provide efficiency of extraction while minimizing the time and preserving the quality of the food matrix, overcoming the disadvantages of conventional techniques characterized by their consumption of large quantities of solvents and providing a sparse quantity of extraction. Jujube, a shrub with a high antioxidant potential, which can be affected by various extraction conditions can be the target of UAE and MAE to increase the antioxidant extraction yield. Exploiting the beneficial properties such as the antioxidant activity can lead to an industrialization process, replacing therefor synthetic antioxidants with natural compounds. These can also help in the development of new nutraceuticals and can be used, for instance, in agro-food industries as preservatives. Keywords : Microwave-assisted extraction (MAE), ultrasound-assisted extraction (UAE), antioxidants, Ziziphus lotus (L.) Lam plant.

scholarly journals Aqueous extraction of anions from coal and fly ash followed by ion-chromatographic determination

2016 ◽  
Vol 81 (12) ◽  
pp. 1441-1453
Author(s):  
Aleksandra Tasic ◽  
Ivana Sredovic-Ignjatovic ◽  
Ljubisa Ignjatovic ◽  
Danijel Djuranovic ◽  
Malisa Antic
Keyword(s):  
Fly Ash ◽  
Ph Value ◽  
Chromatographic Determination ◽  
Aqueous Extraction ◽  
Microwave Assisted Extraction ◽  
Ultrasound Assisted Extraction ◽  
Microwave Assisted ◽  
Assisted Extraction ◽  
Coal Particles ◽  
Ultrasound Assisted

Three different techniques were applied for the aqueous extraction of anions from coal and fly ash: rotary mixer- and ultrasonic-assisted extraction with different duration time, and microwave-assisted extraction at different temperatures. Validation showed that the ion-chromatographic method was suitable for the analysis of anions in coal and fly ash extracts. The variations in the amounts of anions using different extraction times during rotary-assisted extraction were minimal for all investigated anions. The efficiency of ultrasound-assisted extraction of anions from coal depended on the sonication time and was highest at 30 min. The ultrasound-assisted extraction was less efficient for the extraction of anions from fly ash than rotary-assisted extraction. Increase of temperature in the microwave-assisted extraction had a positive effect on the amounts of all anions extracted from coal and sulphate from fly ash, while the amounts of fluoride and chloride in fly ash extracts decreased. The microwave-assisted extraction of coal at 150?C was compared with standard ASTM methods, and results were in good agreement only for chloride. Changes in the pH value and conductivity during ultrasound-assisted extraction were measured in order to explain changes on the surface of coal particles in contact with water and different processes that occur under environmental conditions.

scholarly journals Penentuan Total Fenol Ekstrak Umbi Bawang Dayak Hasil Ekstraksi Dengan Metode Ultrasound Assisted Extraction (UAE) dan Ultrasonic-Microwave Assisted Extraction (UMAE)

2017 ◽  
Vol 3 (2) ◽  
Author(s):  
Ashadi Sasongko ◽  
R Wahyu Nugroho ◽  
C Edra Setiawan ◽  
Indah W Utami ◽  
Memik D Pusfitasari
Keyword(s):  
Microwave Assisted Extraction ◽  
Ultrasound Assisted Extraction ◽  
Microwave Assisted ◽  
Assisted Extraction ◽  
Ultrasound Assisted ◽  
Eleutherine Americana

Bawang dayak (Eleutherine americana) merupakan tanaman khas Kalimantan yang memiliki semua kandungan fitokimia antara lain alkaloid, glikosida, flavonoid, fenolik, steroid dan tanin. Senyawa fenolik berpotensi sebagai antioksidan.Ekstraksi senyawa bahan alam secara konvensional membutuhkan waktu yang lama dan dapat memicu kerusakan senyawa sehingga perlu metode yang lebih cepat dan efesien seperti metode Ultrasound Assisted Extraction (UAE) danUltrasound-Microwave Assisted Extraction (UMAE). Tujuan dari penelitian ini adalah untuk mengekstrak dan menentukan kadar senyawa fenolik dalam bawang dayak. Hasil yang optimal didapatkan dari waktu sonikasi selama 30 menit danvolume pelarut sebesar 240 mL.Penggunaan microwave dalam ekstraksi justru menimbulkan degradasi senyawa fenolik. Kata kunci: total fenol, bawang dayak, Eleutherine americana, UAE, UMAE

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