Total Polyphenol and Flavonoid Content and Antioxidant Capacity of Some Varieties of Persea americana Peels Consumed in Cameroon

Dibacto, Ruth Edwige Kemadjou; Tchuente, Boris Ronald Tonou; Nguedjo, Maxwell Wandji; Tientcheu, Yves M. T.; Nyobe, Emilienne Carine; Edoun, Ferdinand Lanvin Ebouel; Kamini, Melanie Flore Godam; Dibanda, Romelle Feumba; Medoua, Gabriel Nama

doi:10.1155/2021/8882594

Cited by 31 publications

(19 citation statements)

References 48 publications

(58 reference statements)

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“…The values obtained for the flavonoid contents in PAE and CAE were 15.5 ± 0.35 and 5.75 ± 0.35 mg rutin/g of dry extract, respectively. The fact that flavonoid components were more abundant in the ethanolic extracts agree with the findings of Dibacto et al (2021) where ethanol extract gave the highest flavonoid content among three solvents: ethanol, ethanol: water; 1:1 v/v and water.…”

Section: Resultssupporting

confidence: 91%

Antimicrobial activity of Chrysophyllum albidum seed extract and its effect on the physicochemical properties of cherry tomato fruits during postharvest storage

Abimbola

Adewumi

Temitope

et al. 2022

Food Processing Preservation

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The high water content of Lycopersicon esculentum usually favors microbial growth, thus resulting in shelf‐life reduction and economic loss. In an effort to develop an ecofriendly preservative for cherry tomatoes, a comprehensive study establishing the antimicrobial activity of the seeds of Chrysophyllum albidum and Persea americana was carried out. Folin Ciocalteu, AlCl3 colorimetric, and agar well diffusion assays were, respectively, used to determine the total phenolic content (TPC), total flavonoid content, and the antimicrobial potential of the extracts. Although the ethanolic extract of C. albidum displayed the highest TPC (90.71 ± 2.17 mg/g GAE), the antimicrobial studies indicated that aqueous extract of C. albidum seed (CAA), which showed the presence of saponins (total saponin content: 7.82%) had the highest zone of inhibition against Samonella typhi (24.5 ± 0.05 mm) and Pseudomonas aeruginosa (22.5 ± 0.05 mm). Treatments with 50 and 100 mg/ml of CAA retained firmness in tomatoes and significantly (p < .05) preserved the postharvest qualities (total soluble solids, total acidity, and ascorbic acid content) of cherry tomatoes. Novelty impact statement Seeds of Chrysophymum albidum and Persea americana, which are usually discarded, possess antioxidant and antimicrobial phytochemicals with the aqueous extract of C. albidum (CAA) exhibiting more impressive antimicrobial properties. CAA treatment significantly preserved the postharvest qualities of cherry tomatoes. Hence, CAA is a cheap and easily affordable natural product treatment can be used to prolong the shelf‐life of cherry tomatoes, thus minimizing economic loss due postharvest wastage of tomatoes.

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Section: Resultssupporting

confidence: 91%

Antimicrobial activity of Chrysophyllum albidum seed extract and its effect on the physicochemical properties of cherry tomato fruits during postharvest storage

Abimbola

Adewumi

Temitope

et al. 2022

Food Processing Preservation

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show abstract

“…This last study also reported TPC values for the seed, from 16.99 to 60.82 mg GAE/g DE, close to resulting values from this assay. On the other hand, higher TPC from ‘Hass’ hydroethanolic extract was reported by Dibacto et al (813 ± 12 mg GAE/g DM) [ 51 ]. Differences among values are due to many factors, such as type of extractant, extraction method, fruit size, ripening stage, etc.…”

Section: Resultsmentioning

confidence: 86%

Biological Evaluation of Avocado Residues as a Potential Source of Bioactive Compounds

et al. 2022

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Avocado seed and peel are the main by-products from avocado industrialisation, and account for nearly 30% of fruit weight. Although they are usually discarded, their high phenolic content has been deeply associated with several nutritional and functional benefits. Thus, for a comprehensive analytical evaluation of both semi-industrial extracts, various steps have been developed: tentative characterisation and quantification of the phenolic composition using HPLC-ESI-qTOF-MS, determination of TPC and antioxidant activity by Folin–Ciocalteu, FRAP, TEAC and ORAC methods, evaluation of scavenging capacity against different ROS and measurement of the enzymatic inhibitory potential against potentially harmful enzymes. Finally, their bioactive potential was tested in a human platelet model where antiaggregatory activity was measured. Hence, 48 different compounds were identified, where flavonoids and procyanidins were the most representative groups. The higher TPC was found in avocado peel extract (190 ± 3 mg/g), which showed more antioxidant power and more capacity to decrease ROS generation than seed extract (60 ± 2 mg/g). In addition, both extracts showed enzymatic inhibition, especially against hyaluronidase, xanthine oxidase and acetylcholinesterase. Lastly, avocado peel was proven to inhibit platelet aggregation with significant results at 1, 0.75 and 0.5 mg/mL, where the extract showed reducing effects on agonists’ expression such as p-selectin or GPIIb/IIIa complex. These results demonstrate that both semi-industrial extracts—above all, avocado peel—have an interesting potential to be exploited as a natural by-product with antioxidant properties with multiple applications for the prevention of different pathologies.

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“…These values are much lower than those obtained in this work. On the other hand, Dibacto et al [ 33 ] reported TAC values for avocado peel extracts of 129.47 mg AAE/g DAP using water as solvent, 132.87 mg AAE/g DAP with 50% ethanol, and 130.02 mg AAE/g DAP for pure ethanol. These results are more like those obtained in the current investigation.…”

Section: Resultsmentioning

confidence: 99%

Deep Eutectic Solvents as a Green Tool for the Extraction of Bioactive Phenolic Compounds from Avocado Peels

et al. 2022

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Avocado peels are the main agro-industrial residue generated during the avocado processing, being a rich source of bioactive compounds like phenolic compounds. The growing demand for more sustainable processes requires the development of new and effective methods for extracting bioactive compounds from industrial waste. Deep eutectic solvents (DESs) are a new sustainable alternative to toxic organic solvents due to their non-toxicity and biocompatibility. In this study, five selected DESs were applied for the extraction of bioactive phenolic compounds from avocado peels. The extraction efficiency was evaluated by measuring the total phenolics and flavonoids content. The best extraction results were obtained with choline chloride-acetic acid and -lactic acid (92.03 ± 2.11 mg GAE/g DAP in TPC and 186.01 ± 3.27 mg RE/g DAP); however, all tested DESs show better extraction efficiency than ethanol. All the obtained NADES extracts have high antioxidant activity (FRAP: 72.5–121.1 mg TE/g; TAC: 90.0–126.1 mg AAE/g). The synthesized DESs and avocado peels DES extracts had activity against all tested bacteria (Staphylococcus aureus, Streptococcus dysgalactiae, Escherichia coli and Pseudomonas putida), and the extracts prepared with choline chloride-acetic acid and -lactic acid have the highest antibacterial activity against all microorganisms. These results, coupled with the non-toxic, biodegradable, low-cost, and environmentally friendly characteristics of DESs, provide strong evidence that DESs represent an effective alternative to organic solvents for the recovery of phenolic bioactive compounds from agro-industrial wastes.

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Total Polyphenol and Flavonoid Content and Antioxidant Capacity of Some Varieties of Persea americana Peels Consumed in Cameroon

Cited by 31 publications

References 48 publications

Antimicrobial activity of Chrysophyllum albidum seed extract and its effect on the physicochemical properties of cherry tomato fruits during postharvest storage

Antimicrobial activity of Chrysophyllum albidum seed extract and its effect on the physicochemical properties of cherry tomato fruits during postharvest storage

Biological Evaluation of Avocado Residues as a Potential Source of Bioactive Compounds

Deep Eutectic Solvents as a Green Tool for the Extraction of Bioactive Phenolic Compounds from Avocado Peels

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