Influence of different extraction techniques on recovery, purity, antioxidant activities, and microstructure of flaxseed gum

2020 ◽  
Vol 85 (10) ◽  
pp. 3168-3182
Author(s):  
Bushra Safdar ◽  
Pang Zhihua ◽  
Liu Xinqi ◽  
Mushtaque Ahmad Jatoi ◽  
Muhammad Tayyab Rashid
Keyword(s):  
Antioxidant Activities ◽  
Extraction Techniques ◽  
Flaxseed Gum

scholarly journals Environmentally Friendly Techniques and Their Comparison in the Extraction of Natural Antioxidants from Green Tea, Rosemary, Clove, and Oregano

Molecules ◽  
2021 ◽  
Vol 26 (7) ◽  
pp. 1869
Author(s):  
Mariel Calderón-Oliver ◽  
Edith Ponce-Alquicira
Keyword(s):  
Green Tea ◽  
Electric Fields ◽  
Antioxidant Activities ◽  
Environmentally Friendly ◽  
Natural Antioxidants ◽  
Deep Eutectic Solvents ◽  
Extraction Methods ◽  
Extraction Techniques ◽  
Health Trends ◽  
Food Applications

Many current food and health trends demand the use of more ecological, sustainable, and environmentally friendly techniques for the extraction of bioactive compounds, including antioxidants. However, extraction yields and final antioxidant activities vary between sources and are highly influenced by the given extraction method and nature and ratio of the employed solvent, especially for total polyphenols, flavonoids, and anthocyanins, which are well recognized as natural antioxidants with food applications. This review focused on the most common extraction techniques and potential antioxidant activity in the food industry for various natural antioxidant sources, such as green tea, rosemary, clove, and oregano. Green extraction techniques have been proven to be far more efficient, environmentally friendly, and economical. In general, these techniques include the use of microwaves, ultrasound, high hydrostatic pressure, pulsed electric fields, enzymes, and deep eutectic solvents, among others. These extraction methods are described here, including their advantages, disadvantages, and applications.

scholarly journals Extraction of Carotenoids from Pumpkin Peel and Pulp: Comparison between Innovative Green Extraction Technologies (Ultrasonic and Microwave-Assisted Extractions Using Corn Oil)

Foods ◽  
2021 ◽  
Vol 10 (4) ◽  
pp. 787
Author(s):  
Minaxi Sharma ◽  
Rajeev Bhat
Keyword(s):  
Corn Oil ◽  
Antioxidant Activities ◽  
Food Product ◽  
Extraction Techniques ◽  
Protection Factor ◽  
Total Carotenoids ◽  
Green Extraction ◽  
Microwave Assisted ◽  
Potential Applications ◽  
Conventional Extraction

Natural pigments improve aesthetic value as well as antioxidant potential of a food product. This study was designed to determine the effects of green extraction techniques on carotenoids, polyphenols and antioxidant activities of pulp and peel of two varieties of pumpkin (Cucurbita maxima). Innovative green extractions (IGE; Ultrasound and Microwave-Assisted Extractions) synergised with corn oil (used as green solvent) were compared with conventional extraction (CE; hexane/isopropyl alcohol; 60:40, v/v). Results showed total carotenoids to be almost double on employing IGE (PM2-UAE-peel = 38.03 ± 4.21; PM4-UAE-peel = 33.78 ± 1.76 µg/g) when compared to conventional extraction (PM2-CE-peel = 19.21 ± 4.39; PM4-CE-peel = 16.21 ± 2.52 µg/g). Polyphenolic contents ranged between 510.69 ± 5.50 and 588.68 ± 7.26 mg GAE/100 g of extract in IGE, compared with conventional extracts (269.50 ± 2.17 to 318.46 ± 6.60 mg GAE/100 g) and percent inhibition of 2,2-Diphenyl-1-picrylhydrazyl (DPPH) ranging between 88.32 ± 1.51 and 93.53 ± 0.30% in IGE when compared with conventional extraction (50.61 ± 1.44 to 57.79 ± 2.09%). Further, oxidative stability of carotenoids extracts from IGE (protection factor = 1.59 ± 0.01 to 1.81 ± 0.05) were found to be significantly higher (p < 0.05) than conventional extracts. Based on results, this study supports the use of innovative green extraction techniques to obtain bioactive pigments like carotenoids. It is anticipated that results generated will find potential applications in food, pharmaceutical and cosmetic industries.

scholarly journals Evaluation of total phenolic content and antioxidant activities from different type of extraction technique of Helianthus tuberosus

2020 ◽  
Author(s):  
Nur Diyana Alyas ◽  
Nurin Izzati Mohd Zulkifli ◽  
Noor Zafira Noor Hasnan
Keyword(s):  
High Pressure ◽  
Aqueous Extract ◽  
Total Phenolic Content ◽  
Phenolic Content ◽  
Antioxidant Activities ◽  
Jerusalem Artichoke ◽  
Total Phenolic ◽  
Helianthus Tuberosus ◽  
Extraction Techniques ◽  
Pressure Steam

This study investigated the difference of antioxidants activity from different extraction techniques of Jerusalem artichoke (Helianthus tuberosus). Three different extraction techniques involved were aqueous extraction, high-pressure steam extraction and 70% ethanol extraction. Total phenolic content (TPC) was determined using the Folin-Ciocalteu method. The antioxidant activities were analysed using ferric reducing antioxidant power (FRAP) and 2,2-diphenyl-1-picrylhydrazyl (DPPH). The high-pressure steam extract showed the highest total phenolic content and both FRAP and DPPH activities at 127.87 ± 0.08 mg GAE/g, 53.38 ±  2.76 mg AAE/g and 79.92 ± 0.26 mg AAE/g. Meanwhile, the aqueous extract showed 2-fold higher of total phenolic content compared to ethanol extract at 65.73 ± 9.44 and 30.61  ± 0.00 mg GAE/g. Conversely, antioxidant activities obtained from ethanol extracts (41.49 ±  2.54 and 41.10 ± 0.10 mg AAE/g.) were higher compared to aqueous extract (23.29 ±  0.47 and 5.24 ± 0.38 mg AAE/g.). This study suggests that different extraction methods influenced the findings of total phenolic content and antioxidant activities of the Jerusalem artichoke.  Hence, Jerusalem artichoke can be considered as a potential source of natural antioxidants.

scholarly journals Comparison of Total Phenolic Contents and Antioxidant Activities of Centella asiatica Extracts Obtained by Three Extraction Techniques

2019 ◽  
Vol 6 (2) ◽  
pp. 42-49
Author(s):  
Wan Nurul Huda Wan Zainal ◽  
FARA RESTINA MUSAHIB ◽  
NABILAH SYAFIQAH ZULKEFLEE
Keyword(s):  
Antioxidant Activity ◽  
Antioxidant Activities ◽  
Radical Scavenging Activity ◽  
Radical Scavenging ◽  
Centella Asiatica ◽  
Extraction Yield ◽  
Total Phenolic ◽  
Extraction Techniques ◽  
Phenolic Contents ◽  
Total Phenolic Contents

Through different extraction techniques, the potential of Centella asiatica as a natural source of antioxidant was investigated. The C. asiatica aqueous extracts were obtained via infusion, decoction and ultrasonic-assisted extraction (UAE) techniques. The effects of different extraction techniques were studied on the extraction yield, total phenolic contents and antioxidant activity. The total phenolic contents of the extracts and antioxidant activity were examined using the Folin-Ciocalteu’s reagent and 2,2-diphenyl-1-picrylhydrazyl (DPPH) free radical scavenging activity assay, respectively. Results indicated that the UAE exhibited the highest extraction yield, highest total phenolic contents, as well as highest antioxidant activity. The yield of the extracts increased in the order of infusion < decoction < UAE which were 18.2 %, 23.6% and 25.4 %, respectively. All extraction techniques had a significant effect (p <0.05) on the total phenolic contents and antioxidant activity of C. asiatica extracts. The total phenolic contents was ranged from 3.42 ± 0.030 to 8.32 ± 0.105 mg GAE/g dry extract while the antioxidant activity was in the range of 75 to 86 %. This study confirms that C. asiatica has the potential to be a good resource for the future development of natural antioxidant. In addition, extraction via UAE can be an ideal technique to obtain phytochemical-rich extracts from medicinal plants.

scholarly journals Extraction Optimization, Physicochemical Characteristics, and Antioxidant Activities of Polysaccharides from Kiwifruit (Actinidia chinensis Planch.)

Molecules ◽  
2019 ◽  
Vol 24 (3) ◽  
pp. 461 ◽  
Author(s):  
Qiao-Hong Han ◽  
Wen Liu ◽  
Hong-Yi Li ◽  
Jing-Liu He ◽  
Huan Guo ◽  
...  
Keyword(s):  
Functional Food ◽  
Antioxidant Activities ◽  
Radical Scavenging ◽  
Reducing Power ◽  
Physicochemical Characteristics ◽  
Extraction Techniques ◽  
Food Ingredients ◽  
Molar Ratios ◽  
Assisted Extraction ◽  
Ultrasonic Assisted

In order to evaluate effects of extraction techniques on the physicochemical characteristics and antioxidant activities of kiwifruit polysaccharides (KPS), and further explore KPS as functional food ingredients, both microwave-assisted extraction (MAE) and ultrasonic-assisted extraction (UAE) were optimized for the extraction of KPS. Furthermore, the physicochemical structures and antioxidant activities of KPS extracted by different techniques were investigated. The optimal extraction conditions of UAE and MAE for the extraction of KPS were obtained by response surface methodology. Different extraction techniques significantly affected the contents of uronic acids, molecular weights, molar ratios of constituent monosaccharides, and the degree of esterification of KPS. Results showed that KPS exhibited remarkable DPPH and ABTS radical scavenging activities, and reducing power. The high antioxidant activities observed in KPS extracted by the MAE method (KPS-M) might be partially attributed to its low molecular weight and high content of unmethylated galacturonic acid. Results suggested that the MAE method could be a good potential technique for the extraction of KPS with high antioxidant activity, and KPS could be further explored as functional food ingredients.

scholarly journals Therapeutic potential of Thymus vulgaris: A Review

2021 ◽  
Author(s):  
Bahisht Rizwan
Keyword(s):  
Essential Oils ◽  
Therapeutic Potential ◽  
Antioxidant Activities ◽  
Thymus Vulgaris ◽  
Extraction Techniques ◽  
Naturally Occurring ◽  
Assisted Extraction ◽  
The Family ◽  
Medicinal Properties ◽  
Anti Fungal

Thymus vulgaris belongs to the family of Lamiaceae, which are flowering plants with aroma. Plant of Thyme grows in the Mediterranean region. Due to essential oils extracted from the leaves of the thyme, which gives aromatic and therapeutic properties. Besides many other health benefits, thyme possesses many medicinal properties. Essential oils of thyme are also crucial in pharmaceutical, cosmeceuticals, and nutraceuticals sectors. Significant oil components contain carvacrol, p-cymene, thymol, and γ-terpinene of thyme's most important ones. Thymol is a naturally-occurring constituent of thyme. It is a 10-64% major part of the thyme oil. It is a monoterpene derivative of cymene and isomer of carvacrol. These constituents have potent anti-fungal, anti-bacterial, and antioxidant activities. These are also beneficial in treating cancers, reduces inflammation, antimicrobial, antispasmodic, immunomodulator, and growth enhancers. It also helps to improve mouth infection. The essential oil of Thymus is safe and used as a natural preservative. Essential oils present in thyme are extracted through many different extraction techniques. Hydro-distillation, steam distillation, hydro diffusion or solvent extraction, and microwave‐assisted extraction are the most common extraction techniques. Plants aroma isolates are used in many food and fragrance companies. The most widely used means of producing this aroma is constituting organic solvent.

scholarly journals Effect of Sonication on the Properties of Flaxseed Gum Films Incorporated with Carvacrol

2020 ◽  
Vol 21 (5) ◽  
pp. 1637
Author(s):  
Shiyuan Fang ◽  
Weiqiang Qiu ◽  
Jun Mei ◽  
Jing Xie
Keyword(s):  
Contact Angle ◽  
Food Packaging ◽  
Antioxidant Activities ◽  
Antioxidant Properties ◽  
Antibacterial Properties ◽  
Vapor Permeability ◽  
Scanning Calorimetry ◽  
Cross Sectional ◽  
Water Sorption Isotherm ◽  
Flaxseed Gum

Carvacrol is a natural compound known to be a highly effective antibacterial; however, it is a hydrophobic molecule, which is a limitation to its use within food packaging. Flaxseed gum (FG) films containing different contents of carvacrol (C) were produced by a film-casting method with sonication. The effects of sonication power and time on the properties of the FG-C films were investigated by measuring the film thickness, mechanical properties, contact angle, opacity, water vapor permeability (WVP), water sorption isotherm, Fourier transform infrared spectroscopy(FTIR), differential scanning calorimetry (DSC), antibacterial and antioxidant activities, and microstructure. The results showed that sonication power and time had significant effects on mechanical and barrier properties, film opacity, and degradability (p < 0.05). The tensile strength (TS) and elongation at break (EB) values exhibited an obvious improvement after sonication, and FG-0.5C-6030 had the lowest TS (33.40 MPa) and EB (4.46%) values. FG-C films formed a denser structure and the contact angle was improved as a result of sonication, which improved the integration of carvacrol into the FG matrix. In terms of microstructure, sonication resulted in a homogeneous and continuous crosssection of FG-C films, and regular surface and cross-sectional images were obtained through the highest acoustic intensity and longest time treatment. The FG films incorporated with carvacrol displayed antibacterial properties against Staphylococcus aureus, Vibrio parahaemolyticus, Shewanella putrefaciens, and Pseudomonas fluorescens, as well as increased antioxidant properties, and sonication was proven to enhance both of them.

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