Evaluation of Reducing Ability and Antioxidant Activity of Fruit Pomace Extracts by Spectrophotometric and Electrochemical Methods

Vasyliev, Georgii; Vorobyova, Viktoria; Linyucheva, О. V.

doi:10.1155/2020/8869436

Cited by 43 publications

(20 citation statements)

References 36 publications

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“…The deep eutectic solvent that consists of choline chloride and 1,2-Propanediol does not show any antioxidant properties, while deep eutectic solvent that consist of choline chloride and D,L-lactic acid exhibit very low antioxidant activity. Similarly, different authors noted that the cholinum-based NADES with oxalic acid also exhibit very low antioxidant activity [56,57].…”

Section: Resultsmentioning

confidence: 92%

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Extraction of phenolic compounds from tomato pomace using choline chloride–based deep eutectic solvents

2021

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The objective of this research was to investigate the efficacy of deep eutectic solvents (DESs)to extract polyphenolic compounds from tomato pomace with the assistance of ultrasound. The phytochemical constituents of tomato pomace extracts (TPE) were verified with a combination of high-performance liquid chromatography coupled with diode array detection and tandem mass spectrometry (HPLC-DAD-MS) and FTIR analysis. The extracted phenolic compounds from tomato pomace were quantified by Folin-Ciocalteu method. The predominant components in tomato pomace extracts were phenolic acids and flavanols. Chlorogenic acid was detected as the main phenolic compound in tomato extracts. The redox behavior of tomato pomace extracts was evaluated by means of cyclic voltammetry. Antioxidant activities of the obtained extracts were determined using the DPPH and ABTS scavenging assays. The reduction capacity of the extracts was assessed using ferric reducing power (FRAP) and phosphomolybdenum (PM) assays. extracts with DESs are characterized by the highest level of antioxidant activity. Theoretical study based on quantum chemistry/molecular modeling were performed to confirm the antioxidants capacity of compounds of tomato pomace extracts. Quantum chemical descriptors such as the frontier orbital energies (E HOMO and E LUMO ), the energy gap between E HOMO and E LUMO (ΔE), hardness, and electrophilicity index have been calculated and discussed.

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Section: Resultsmentioning

confidence: 92%

“…Cyclic voltammetry has been reported as a simple analytical tool for estimating the total antioxidant activity [56], the results of cyclic voltammetry are presented in Fig. 10, and the main parameters are presented Table 7.…”

Section: Resultsmentioning

confidence: 99%

Extraction of phenolic compounds from tomato pomace using choline chloride–based deep eutectic solvents

2021

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“…Therefore, the reducing power was further investigated. The reducing power is an important indicator that is often used to determine phenolic-reducing ability ( Vasyliev et al, 2020 ). The reducing power of the sample increased with a prolongation of the fermentation time and reached its maximum (0.47 ± 0.01) after fermentation for 48 h, which represented a significant difference in comparison with the value before fermentation ( p < 0.05).…”

Section: Resultsmentioning

confidence: 99%

Improvement of antioxidant properties of jujube puree by biotransformation of polyphenols via Streptococcus thermophilus fermentation

Zhao

Pan

et al. 2022

Food Chemistry: X

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“…In general, citrus fruits contain pectin, sugar, carotenoid pigments, vitamins (A, B1, and C), and; organic acids such as ascorbic acid and citric acid, minerals and a number of active phytochemicals such as flavonoids and coumarins, as naringenin, naringin, hesperidin, neohesperidin, hesperetin, rutin, narirutin and tangeretin [9]. For example; polyphenol antioxidants such as flavanols (epicatechin, catechin), phenolic acids (caffeic acid and gallic acid), anthocyanins (e.g., malvidin-3-glucoside), oligomeric and polymeric proanthocyanidins, flavonols (myricetin, quercetin, and their glycosides), and many others polyphenols exist in wine, especially in red wine [10]. Flavonoids have an important role in scavenging reactive oxygen species, which can counteract lipid oxidation, decrease peroxide formation in vivo, and improve activity of the body's antioxidant enzyme.…”

Section: Introductionmentioning

confidence: 99%

Electrochemical Applications for the Antioxidant Sensing in Food Samples Such as Citrus and Its Derivatives, Soft Drinks, Supplementary Food and Nutrients

Demir¹,

Silah²,

Aydogdu³

2021

Citrus - Research, Development and Biotechnology

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Although there are many definitions of antioxidants, the most general description; antioxidants are carried a phenolic function in their structure and prevent the formation of free radicals or intercept from damage to the cell by scavenging existing radicals. Moreover, they are one of the most effective substances that contain essential nutrients for healthy individuals. The importance of these antioxidants, which have an incredible effect on the body and increase the body’s resistance, is increasing day by day for healthy individuals. Numerous studies have been carried out for antioxidants with excellent properties and however new, reliable, selective, sensitive and green analytical methods are sought for their determination at trace levels in food samples. Along with the latest developments, electrochemical methods are of great interest in the world of science because they are fast, reliable, sensitive and environmentally friendly. Electrochemical methods have been frequently applied to analyze antioxidant capacity in many nutrients samples found in different forms such as solid, liquid without any pretreatment applications in the last decade. Furthermore, these methods are preferred because of the short analysis time, the ability to lower detection limits, reduction in a solvent, high sensitivity, portability, low sample consumption, wide working range, and more economical than existing other traditional analytical methods. The antioxidant sensing applications by modern electrochemical methods such as cyclic, square wave, differential pulse, and combined with stripping voltammetric techniques were used to deduce antioxidant capacity (AC) in critical nutrients. Moreover, this chapter includes a description of the classification of electrochemical methods according to the working electrode type, dynamic working range, limit of determination (LOD), limit of quantification (LOQ), sample type, and using standard analyte and so forth for each voltammetric methods. While many articles applied for the determination of antioxidant sensing by electrochemistry have gained momentum in the last two decades, we focused on the studies conducted over the last 4 years in this chapter.

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Evaluation of Reducing Ability and Antioxidant Activity of Fruit Pomace Extracts by Spectrophotometric and Electrochemical Methods

Cited by 43 publications

References 36 publications

Extraction of phenolic compounds from tomato pomace using choline chloride–based deep eutectic solvents

Extraction of phenolic compounds from tomato pomace using choline chloride–based deep eutectic solvents

Improvement of antioxidant properties of jujube puree by biotransformation of polyphenols via Streptococcus thermophilus fermentation

Electrochemical Applications for the Antioxidant Sensing in Food Samples Such as Citrus and Its Derivatives, Soft Drinks, Supplementary Food and Nutrients

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