Evaluation to the antioxidant activity of total flavonoids extract from persimmon (Diospyros kaki L.) leaves

Sun, Lijun; Zhang, Jianbao; Lu, Xiaoyun; Zhang, Liyu; Zhang, Yali

doi:10.1016/j.fct.2011.07.042

Cited by 261 publications

(166 citation statements)

References 50 publications

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“…The chelating ability of ferrous ions by the extracts was estimated by the previously reported methods [5], [6]. The crude extract supernatants (2.5 mL) were mixed with of 2 mM FeCl 2 ．4H 2 O (0.05 mL).…”

Section: E Chelating Effect Of Ferrous Ions (Frap)mentioning

confidence: 99%

Polyphenol Measurement and Antioxidant Activity of Miracle Fruit

Cheng¹,

Huang²,

Lin³

et al. 2015

IJCEA

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Abstract-Miracle fruit has unique protein which can make sour flavors to sweet, and the bright red skin might be a natural pigment. After the harvest of miracle fruit, removal of fruit skin, fruit meat, the fruit seeds become natural side product using for biofertilizer. Recently, a growing research reports focus on the investigation of fruit seeds for screening potential antioxidants, such as steroids, phenols, and flavonoids as well. In this research, we verity miracle fruit seed is great multi-antioxidant source by different extraction solution. 3μg (GAE)/mg total phenolic and 3.1μg (RUE)/mg flavonoid content was measured when the miracle fruit was extracted by acetic acid buffer with 20mM at pH6.0 and pure ethanol. The antioxidation ability of DPPH and ABTS free radical scavenging was over 70%, chelating effect of ferrous ions reached 80%.Index Terms-Miracle fruit, fruit seed, total phenolics, antioxidant activity.

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Section: E Chelating Effect Of Ferrous Ions (Frap)mentioning

confidence: 99%

Polyphenol Measurement and Antioxidant Activity of Miracle Fruit

Cheng¹,

Huang²,

Lin³

et al. 2015

IJCEA

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“…In phosphomolybdenum method, Mo 6+ is reduced to form a green phosphate/Mo 5+ complex at acidic pHs in the presence of antioxidant material [28]. So, high absorbance values resulting from more intense green color indicate that the sample possesses significant antioxidant activity.…”

Section: Antioxidant Activitiesmentioning

confidence: 99%

“…It is known that different methods are based on different reaction mechanisms since antioxidants may exhibit their useful effect by three main processes such as hydrogen atom transfer, single electron transfer and metal chelation [28]. Varieties of phytochemicals including and the associated variety in chemical moieties are other reasons of using different assays more than one [27].…”

Section: Antioxidant Activitiesmentioning

confidence: 99%

“…So, it is important to investigate several additives with • OH scavenging activity of very high degree. Furthermore, it was reported that the • OH scavenging capacity of extract directly reflects its antioxidant activity [28]. 2.5 μg/ml of BHA scavenged the hydroxyl radicals in the ratio of 33%.…”

Section: Antioxidant Activitiesmentioning

confidence: 99%

“…SOD radicals scavenging power of the extracts may depend on their contents such as phenolics [27]. An antioxidative extract can terminate the radical chain reaction by scavenging the superoxide radicals by combining with superoxide radical ions to form stable radicals [28].…”

Section: Antioxidant Activitiesmentioning

confidence: 99%

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Antioxidant activity of Trachystemon orientalis (L.) G. Don (Borage) grown and eaten as food in Ordu, Turkey

Ayvaz

2015

Herba Polonica

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SummaryIntroductıon: Instead of synthetic antioxidants, using of natural products with antioxidant activity is demanded.Objectıve: The aim of this study is to evaluate the antioxidant activity and total phenolic and flavonoid contents of theTrachystemon orientalis(borage) obtained from Ordu.Methods: The water and ethanol extracts of the borage plant were investigated by using severalin vitroantioxidant activity tests such as total antioxidant capacity, O2•−,•OH, DPPH and ABTS radicals scavenging activities, hydrogen peroxide scavenging activity, FRAP, Fe2+chelating and reducing power assays in order to make effective comparisons.Results: Water extract of theT. orientalishad the more phenolic (90 mg GA/g extract) and flavonoid (56.88 mg CT/g extract) contents than ethanol extract. Furthermore, both of the extracts showed strong antioxidant and radical scavenging activities determined by differentin vitromodels. The highest total antioxidant capacity as ascorbic acid equivalents of 244.50 mg/g extract was also calculated for water extract. Generally, a relationship between total phenolic content and antioxidant activity was established. It is also an important finding for an edible food source that the phenolic and flavonoid content and antioxidative activities for water extract was higher than the ethanol extract.Conclusıon:T. orientaliscould be used as a food ingredient instead of synthetic antioxidants and all results will contribute to the recent increase in investigations on using natural products in many areas such as food, pharmacy, alternative medicine and natural therapy.

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Comparative Study on Biological Activities and Chemical Profiling of Mushroom (Pleurotus pulmonarius (Fr.) Quel.) Cultured on Lignocellulosic Agro Wastes

Zamakshshari

Ahmed

Nasharuddin

et al. 2023

Chemistry & Biodiversity

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The relevance of the lignocellulosic substrate in the cultivation of mushrooms has lent support to the exploration of several lignocellulosic agro wastes. This study was, thus, aimed at the evaluation of durian peel as an alternative substrate for more sustainable mushroom cultivation and climate change mitigation. The secondary metabolites and biological activities of both aqueous and organic mushroom (Pleurotus pulmonarius (Fr.) Quel.) extract cultured on durian peel and rubberwood sawdust substrate were compared using GCMS, LCMS as well as various biological assays (cytotoxicity, antimicrobial and antioxidant activities). Mushroom extracts from durian peel substrates possess remarkable biological activities. The results showed that the aqueous extracts had poor antimicrobial activities. The organic extracts were more active against cancer cells than the aqueous extracts, while the aqueous extracts were more potent as antioxidants than the organic extracts. Overall, the mushroom extract from the durian substrate was the most effective except against A549 and SW948, while the aqueous extract from the durian substrate was the most effective against the A549 cancer cell lines with 29.53±2.39 % inhibition. On the other hand, the organic mushroom extract from the sawdust substrate was the most effective against SW948 with 60.24±2.45 % inhibition. Further studies, however, are needed to elucidate the molecular mechanism of action of P. pulmonarius extracts against cancer cell proliferation and the effect of the substrates on the nutritional composition, secondary metabolites, and other biological activities of P. pulmonarius extracts.

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Evaluation to the antioxidant activity of total flavonoids extract from persimmon (Diospyros kaki L.) leaves

Cited by 261 publications

References 50 publications

Polyphenol Measurement and Antioxidant Activity of Miracle Fruit

Polyphenol Measurement and Antioxidant Activity of Miracle Fruit

Antioxidant activity of Trachystemon orientalis (L.) G. Don (Borage) grown and eaten as food in Ordu, Turkey

Comparative Study on Biological Activities and Chemical Profiling of Mushroom (Pleurotus pulmonarius (Fr.) Quel.) Cultured on Lignocellulosic Agro Wastes

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