scholarly journals Comparison of Ultrasound Assisted Extraction and Conventional Extraction Technique on Recovery of Phenolic and Flavonoid Compounds from Aloe barbadensis Miller

2021 ◽  
Vol 765 (1) ◽  
pp. 012073
Author(s):  
WHW Osman ◽  
NL Badri ◽  
AT Chong ◽  
M Mohamad ◽  
AZ Sulaiman
Keyword(s):  
Extraction Technique ◽  
Ultrasound Assisted Extraction ◽  
Aloe Barbadensis ◽  
Flavonoid Compounds ◽  
Assisted Extraction ◽  
Ultrasound Assisted ◽  
Conventional Extraction ◽  
Phenolic And Flavonoid ◽  
Phenolic And Flavonoid Compounds

scholarly journals Agro-industrial waste as a source of bioactive compounds: ultrasound-assisted extraction from blueberry (Vaccinium myrtillus) and raspberry (Rubus idaeus) pomace

2021 ◽  
Vol 43 ◽  
pp. e55564
Author(s):  
Suelen Siqueira dos Santos ◽  
Carolina Moser Paraíso ◽  
Letícia Misturini Rodrigues ◽  
Grasiele Scaramal Madrona
Keyword(s):  
Bioactive Compounds ◽  
Energy Efficient ◽  
Extraction Method ◽  
Rubus Idaeus ◽  
Total Phenolic ◽  
Ultrasound Assisted Extraction ◽  
Assisted Extraction ◽  
Ultrasound Assisted ◽  
Conventional Extraction ◽  
Gallic Acid Equivalent

Blueberry and raspberry pomace are a rich source of bioactive compounds that have not been commercially utilized yet, and ultrasound-assisted technology can efficiently extract these compounds. Also, the use of water as a solvent added to the ultrasound-assisted technology improves this eco-friendly process. Therefore, an aqueous eco-friendly extraction, including extraction time and ultrasound presence or absence (conventional extraction) was performed in order to extract bioactive compounds from blueberry and raspberry pomace. Response parameters included levels of anthocyanins, phenolic compounds, and flavonoids, and antioxidant activity determined by DPPH, ABTS, and FRAP methods. Analysis of variance results indicated that ultrasound-assisted extraction for 45 min. was feasible to extract the bioactive compounds. The antioxidant content of the extract obtained by the ultrasound-assisted process was 1.4 times higher on average and the total phenolic concentration was 1.6 times higher (for blueberry 5.02 and for raspberry 2.53 mg gallic acid equivalent/g) compared with those obtained by the conventional process. Thus, the ultrasound-assisted extraction method can be a profitable alternative to extract bioactive compounds from blueberry and raspberry pomace, as it is energy efficient, requires fewer chemicals, and produces less effluent. This eco-friendly technology is therefore viable for food, nutraceutical, and cosmetic industries, and also for reducing food waste.

scholarly journals Effects of Ultrasound-Assisted Extraction and Solvent on the Phenolic Profile, Bacterial Growth, and Anti-Inflammatory/Antioxidant Activities of Mediterranean Olive and Fig Leaves Extracts

Molecules ◽  
2020 ◽  
Vol 25 (7) ◽  
pp. 1718 ◽  
Author(s):  
Cristina Alcántara ◽  
Tihana Žugčić ◽  
Radhia Abdelkebir ◽  
Jose V. García-Pérez ◽  
Anet Režek Jambrak ◽  
...  
Keyword(s):  
Bioactive Compounds ◽  
Bacterial Growth ◽  
Extraction Methods ◽  
Olive Leaves ◽  
Ultrasound Assisted Extraction ◽  
Phenolic Profile ◽  
Assisted Extraction ◽  
Ultrasound Assisted ◽  
Conventional Extraction ◽  
Anti Inflammatory

Mediterranean plants, such as fig and olive leaves, are well-known to exert beneficial effects in humans because of the presence of a wide range of bioactive compounds. However, scarce information regarding the impact of extraction methods, such as ultrasound and types of solvents, on their profile of antioxidant and anti-inflammatory compounds is provided. In addition, no information is available on the effects of extraction methods and solvents on the inhibition of pathogenic bacteria or promoting probiotic growth. In this scenario, this study was aimed to study the effects of ultrasound-assisted extraction (UAE) and solvent on the phenolic profile (Triple TOF-LC-MS/MS), antioxidant and anti-inflammatory compounds of olive and fig leaves. Results showed that UAE extracted more carotenoids compared to conventional extraction, while the conventional extraction impacted on higher flavonoids (olive leaves) and total phenolics (fig leaves). The antioxidant capacity of aqueous extract of fig leaves was three times higher than the extract obtained with ethanol for conventional extraction and four times higher for UAE. In general terms, hydroethanolic extracts presented the highest bacterial growth inhibition, and showed the highest anti-inflammatory activity. In conclusion, these side streams can be used as sources of bioactive compounds for further development of high-added-value products.

scholarly journals BY-PRODUCTS OF PROCESSING CAROB MOLASSES AS SOURCES OF DIETARY FIBRE AND POLYPHENOLS

2020 ◽  
Vol 14 (4) ◽  
Author(s):  
Vasfiye-Hazal Ozyurt ◽  
Semih Otles
Keyword(s):  
Dietary Fibre ◽  
High Performance ◽  
Gravimetric Method ◽  
Array Detector ◽  
Diode Array ◽  
Diode Array Detector ◽  
Ultrasound Assisted Extraction ◽  
Assisted Extraction ◽  
Ultrasound Assisted ◽  
Conventional Extraction

Dietary fibre and polyphenols have been widely used to increase the functionality of some foods because of their potential  effects on human health. In this study, extraction of dietary fibre and polyphenols from pomace obtained as a by-product of processing carob molasses has been studied. The dietary fibre and polyphenol extracts were prepared separately. The amount of dietary fibre in the carob molasses pomace was evaluated with two assays: the Association of Official  Analytical Chemists’ enzymatic-gravimetric method and the enzymatic-chemical method. The methods were compared, each having been preceded by conventional extraction and ultrasound-assisted extraction of carob  molasses pomace. It has been found that when the enzymatic-gravimetric method and the ultrasound-assisted extraction method were used, the total dietary fibre contents were significantly higher than after using the enzymatic-chemical method and the conventional extraction method. Conventional extraction of polyphenols from carob molasses pomace has shown a relatively higher polyphenol content and antioxidant activity than ultrasound-assisted extraction. Ultrasound-assisted extraction  took  less time than conventional extraction did. The polyphenol profile was characterised by means of a high-performance liquid-chromatography diode array detector using 10 phenolic standards. Six compounds, i.e. caffeic, syringic, -epicatechin, trans-cinnamic  acid,  myricetin,  and naringin were determined with the high-performance liquid chromatography-diode array detector using both conventional extraction and the ultrasound-assisted extraction. Our results suggest that carob molasses pomace can be used to prepare low-calorie, high-fibre, and antioxidant-rich foods, nutraceuticals, and pharmaceuticals.

scholarly journals Penetapan Kadar Fenolik dan Flavonoid Hasil Ultrasonic Assisted Extraction Daun Binahong (Anredera cordifolia [Ten] Steenis)

2020 ◽  
Vol 11 (1) ◽  
pp. 16-23
Author(s):  
Landyyun Rahmawan Sjahid ◽  
Amelia Aqshari ◽  
Sediarso Sediarso
Keyword(s):  
Phenolic Compounds ◽  
Pharmacological Activity ◽  
Extraction Method ◽  
Ethanolic Extract ◽  
Assisted Extraction ◽  
Ultrasonic Assisted ◽  
Ultrasonic Assisted Extraction ◽  
Conventional Extraction ◽  
Phenolic And Flavonoid ◽  
Phenolic And Flavonoid Compounds

Anredera cordifolia [Ten] Steenis has been proven to have pharmacological activity that is thought to be influenced by the presence of phenolic compounds and flavonoids. However, both compounds are found in small concentrations through conventional extraction (maceration, decoction, soxhlet, and reflux). This study aims to prove that the ultrasonic assisted extraction method can obtain higher concentrations of phenolic and flavonoid compounds. Dried binahong leaves were extracted using ultrasonic assisted extraction with 70% ethanol. Phenolic levels were determined using Folin-Ciocalteu, while flavonoid levels were determined using the colorimetric aluminum method. The results showed binahong leaves ethanolic extract had phenolic levels of 10.16 % GAE and flavonoid levels of 10.58 % QE. These results are much higher than the results obtained using conventional extraction so that ultrasonic assisted extraction can be recommended to maximize the extraction of phenolic and flavonoid levels from the leaves of Binahong (Anredera cordifolia [Ten] Steenis). 

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