• Asian-Australasian Journal of Animal Sciences
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• 제32권10호
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• pp.1591-1602
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• 2019

Objective: The present study was conducted to evaluate the antioxidant potential of paneer, a soft cheese supplemented with various water soluble date extracts during storage. Further, the whey obtained from all the paneer samples was also investigated for its antioxidant potential. Methods: The date cultivars were evaluated for their physico-chemical characteristics and date extracts were assessed for their antioxidant potential. Physico-chemical evaluation, microbiological quality and further antioxidant potential of the prepared paneer were carried out during storage period (0 to 8 days, $5^{\circ}C$). Results: All the date extracts were found to have considerable antioxidant activity due to presence of total phenolics and flavonoids. Owing to the presence of phenolics and flavoinds in date extracts, supplemented paneer showed higher trolox equivalent antioxidant capacity, reducing power and 2, 2-diphenyl-1-picrylhydrazyl (DPPH) radical scavenging activity than control paneer. Paneer supplemented with Rabi extracts had the highest total phenolics ($190.7{\mu}g$ gallic acid equivalent/g paneer), DPPH radical scavenging activity ($928.1{\mu}mol$ equivalent of Trolx/g paneer) and trolox equivalent antioxidant capacity ($9.2{\mu}mol$ equivalent of Trolx/g paneer). The whey obtained from control paneer showed lower values of total phenolics, total flavonoids, DPPH, trolox equivalent antioxidant capacity and reducing power as compared to the values of whey obtained from paneer supplemented with date extracts. Conclusion: Paneer supplemented with date extracts and its whey may offer potent antioxidant activity.

• Korean Chemical Engineering Research
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• 제59권2호
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• pp.153-158
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• 2021

In this study, we will determined the total phenolic content (TPC) and the antioxidant activity of the methanolic extract (ME) of date palm (Phoenix dactylifera. L) fruits (DPF) of four native cultivars from Algeria: Ghars (Gh), Chtaya (Cht), DeglaBeïda (DB) and Tinissine (Tns). The TPC of ME of DPF was measured by using Folin-Ciocalteu. Thereafter, the antioxidant capacity of various extracts was determined using DPPH test, reducing power and superoxide anion test. These results showed that dates had strongly scavenging activity on DPPH. The value of IC50 for DPPH radical test was 0.077 mg/ml in Cht. Also, Cht cultivar showed the best-reducing power, which was significantly higher than the other varieties. The less IC50 value in cyclic voltammetry method (CV), which meets the highest effective antioxidant, was 0.006 mg/ml in methanolic extract of Cht.

• 한국식품영양과학회지
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• 제44권11호
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• pp.1653-1659
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• 2015

본 연구는 흑미 수확시기에 따른 종실의 이화학적 특성 및 항산화 활성 변이를 검토하였는데, 실험에 이용된 흑미 5개 품종(눈큰흑찰, 신농흑찰, 신토흑미, 조생흑찰, 흑진주)의 출수일로부터 각각 35, 40, 45, 50, 55일에 수확을 하여 출수 후 수확일수에 따른 특성을 비교한 결과, 무기성분(칼륨, 칼슘, 마그네슘)은 수확시기에 따른 유의성이 인정되지 않았다. 기능성 성분인 폴리페놀의 경우 흑진주를 제외하고 4개 품종에서 출수 후 35일 이후 시간이 지날수록 감소하는 경향이었고, 플라보노이드도 조생흑찰 및 흑진주를 제외하고 수확시기에 따라 함량이 감소하는 경향이었다. 수확시기와 안토시아닌 함량과의 관계를 분석한 결과 모든 품종이 부의 상관관계를 보였고, 흑진주벼를 제외하고는 $R^2$ 값이 0.8~0.9 정도로 유의성이 인정되었다. 항산화 활성 또한 흑진주 벼를 제외하고는 출수 후 35일경이 항산화 활성이 가장 높았고, 이후 점점 감소하는 경향이었다.