Enzyme-assisted supercritical fluid extraction of phenolic antioxidants from pomegranate peel

Mushtaq, Muhammad; Sultana, Bushra; Anwar, Farooq; Adnan, Ahmad; Rizvi, Syed S.H.

doi:10.1016/j.supflu.2015.05.020

Cited by 161 publications

(80 citation statements)

References 38 publications

(32 reference statements)

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“…The mean concentrations of ellagic acid were much lower than those of α‐punicalagin and β‐punicalagin. The presence of these polyphenols in pomegranate peels has been reported in many previous studies (Akhtar et al, ; Mushtaq, Sultana, Anwar, Adnan, & Rizvi, ).…”

Section: Resultssupporting

confidence: 69%

Reactions of polyphenols in pomegranate peel with nitrite under simulated stomach conditions

Xie

Tang

et al. 2019

Food Science & Nutrition

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Punicalagin and ellagic acid are the major polyphenols present in pomegranate peels. The contents of α‐punicalagin, β‐punicalagin, and ellagic acid in the pomegranate peels were approximately 75, 72, and 20 µM, respectively. The reactions of polyphenols in pomegranate peels with sodium nitrite under simulated stomach conditions were studied. The reactions decreased the polyphenolic contents of the pomegranate peels and accompanied the formation of nitroso compounds. The oxidation rates followed the order ellagic acid ＜α‐punicalagin ≈ β‐punicalagin. The results suggested that the reactions can occur in the stomach after a meal, while the pH changes from 2 to 4.5.

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Section: Resultssupporting

confidence: 69%

Reactions of polyphenols in pomegranate peel with nitrite under simulated stomach conditions

Xie

Tang

et al. 2019

Food Science & Nutrition

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“…Application of advanced methods in extraction of polyphenols in diferent foods and agro-waste matrices [63][64][65][66][67][68][69][70][71][72][73].…”

Section: Grape Residues (Vitis Vinifera)mentioning

confidence: 99%

Phenolics in Foods: Extraction, Analysis and Measurements

Aires¹

2017

Phenolic Compounds - Natural Sources, Importance and Applications

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The increasing consumers demands to acquire healthier fruits and vegetables as well as the urgency in looking to natural compounds with antioxidant activity and enhanced antimicrobial activity against antibiotic-resistant pathogenic bacterial strains have encouraged a quick expansion of research studies about enhanced phenolic extraction and identiication methods. Considering the importance of phenolics as natural compounds with antioxidant and antimicrobial activity, this chapter aims to present the most updated information about extraction methods, ranging from the traditional to the most advanced processes, as well as the access to the modern methods used in the identiication and quantiication of phenolics. The main goal of this chapter is to provide the reader with a broad view on the diferent protocols used to extract, identify and quantify phenolic compounds from diferent kinds of foods, including fruits and vegetables.Keywords: phytochemicals, extraction, determination, colorimetric methods, HPLC, HPLC-MS IntroductionThe growing resistance of pathogenic bacterial isolates against the traditional chemical antibiotics as well as the resurgent of old disappeared diseases associated with the constant consumers' demanding of healthier, nutritious and safe food has led the researchers to focus on searching for new, safe and efective molecules. One class of such molecules is the class of polyphenols. Polyphenols are a ubiquitous class of compounds largely present in plants as their secondary metabolites, which are synthesized during their normal development [1] in response to several stressful biotic and abiotic factors [2,3]. This class of compounds are a much diversiied group derived from the amino acids phenylalanine and tyrosine and The results from the last decade's research have shown that polyphenols have important beneicial properties for human health, including antioxidative, antiaging, antibacterial and antimutagenic [7][8][9][10][11]. Moreover, the recent evidence of their interaction with proteins, DNA and other biological molecules has enhanced their exploitation for the production of new natural product-derived therapeutic agents. Despite these advantages, several limitations still persist, particularly those related with their extraction eiciency, which afects the large-scale use of some of these substances. The diiculties in screening, extracting, separation and purifying these compounds have increased the development of new and modern methods to address these limitations. In this context, the aim of this chapter is to present an updated review about sources, technologies and methods that have been developed until now to improve the extraction, detection, separation and full characterization of such beneicial compounds, with special emphasis to their possible application in the design of nutraceuticals and functional food products. Foods as natural resources of phenolicsPolyphenols have been exhaustively studied in their diferent natural matrices such as fruits, vegetables, teas, algae a...

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“…It is used for extraction of dyes, aromas, fatty acids, active ingredients of plant origin used in production of cosmetics, or for decaffeination of coffee (Gracia et al 2007;Hulbert et al 1998;Mushtaq et al 2015). The interest in supercritical extraction has been recently increasing and it is expected that the amount of waste products accompanying this process will increase.…”

Section: Introductionmentioning

confidence: 99%

Removal of NO2 by carbonaceous adsorbents obtained from residue after supercritical extraction of marigold

2015

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Carbonaceous adsorbents were obtained from the residue after supercritical extraction of marigold subjected to physical activation and used as nitrogen dioxide and iodine adsorbents. The effect of carbonisation and activation temperature on the textural parameters, acidbase character of the surface and sorption properties of the activated carbons was tested. The materials obtained were activated carbons of low-developed surface area varying from 2 to 206 m 2 /g, showing clearly basic character of the surface. The results proved that proper selection of the carbonisation and activation procedure of the residue after supercritical extraction of marigold permitted obtaining carbonaceous adsorbents with good capacity toward liquid as well as gas inorganic pollutants. The effectiveness of NO 2 removal was found to depend to large extent on the conditions of adsorption. The preliminary wetting of the adsorbent bed was shown to significantly increase the amount of pollutants removed.

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Enzyme-assisted supercritical fluid extraction of phenolic antioxidants from pomegranate peel

Cited by 161 publications

References 38 publications

Reactions of polyphenols in pomegranate peel with nitrite under simulated stomach conditions

Reactions of polyphenols in pomegranate peel with nitrite under simulated stomach conditions

Phenolics in Foods: Extraction, Analysis and Measurements

Removal of NO2 by carbonaceous adsorbents obtained from residue after supercritical extraction of marigold

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