Evaluating the Effect of Gamma Radiation on the Total Phenolic Content, Flavonoids, and Antioxidant Activity of Dried <i>Pleurotus ostreatus</i> ((Jacq. ex. Fr) Kummer) Stored in Packaging Materials

Kortei, Nii Korley; Odamtten, G.T.; Obodai, M.; Appiah, Victoria; Akuamoa, Felicia; Adu-Bobi, Afua Kobi; Annan, Sylvester Nana Yao; Armah, Jonathan; Acquah, Stanley

doi:10.1155/2014/262807

Cited by 12 publications

(9 citation statements)

References 48 publications

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“…The highest IP of sesame can be attributed to the presence of high contents of phenolic compounds promoting increased antioxidant activity. It was confirmed through a significant linear correlation between the values of the total phenolic content and the activity of the antioxidant extracts 93 . The results for the Rancimat method employing test samples were shown in Figure 11.…”

Section: Resultsmentioning

confidence: 65%

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Experimental evaluation over the effects of natural antioxidants on oxidation stability of binary biodiesel blend

Jeyakumar¹,

Huang

Balasubramanian

et al. 2022

Intl J of Energy Research

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Summary Prolonged storage of biodiesel leads to deterioration of fuel properties and its usage in engines results in drop‐in performance characteristics. The present study deals with the effect of natural antioxidants on the storage stability of binary biodiesel blend of Jatropha biodiesel and lemongrass oil, which are synthesized through transesterification and steam distillation process, respectively. Natural antioxidants such as sesame, horse gram, sweet basil, coffee, and peas were employed in the current study. Thermal analysis of the antioxidants was carried out utilizing differential scanning calorimetry and thermogravimetric analysis to study the effect of temperature on antioxidants. Ethanol extract of natural antioxidants was prepared at various concentrations such as 500, 1000, and 1500 ppm. Total phenol content in the antioxidant extracts was determined through the Folin‐Ciocalteu method in terms of gallic acid equivalent (GAE). The oxidation stability of fuel samples with the addition of antioxidant extracts was estimated by the Rancimat method in terms of the induction period (IP). As a result, the scavenging effect in percentage for sesame, horse gram, sweet basil, coffee, and peas were 88.76%, 86.51%, 75.28%, 74.15%, and 70.78% at 1500 ppm, respectively. Besides, the total phenol content (mg GAE/100 g) for sesame, horse gram, sweet basil, coffee, and peas observed are 97.37, 39.99, 35.07, 30.15, and 25.25, respectively. More interestingly, adding antioxidants extracted from sesame, horse gram, sweet basil, coffee, and peas could increase the IP of the Jatropha biodiesel‐lemongrass oil binary blend to 9.92, 8.10, 7.74, 7.10, and 4.10 hours, respectively compared to the case of binary blend without antioxidant (only 2.06 hours). In general, the inclusion of natural antioxidants additives increased the oxidation stability of biodiesel, promoting its prolonged storage, and the overall effectiveness of selected natural antioxidants was found to be in the order of sesame > horse gram > sweet basil > coffee > peas. Highlights The incorporation of a binary biodiesel blend reduces the cost of biodiesel synthesis. Replacement of synthetic antioxidant additive with natural antioxidant additive. Natural antioxidant addition enhances the storage stability of binary biodiesel blend.

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Section: Resultsmentioning

confidence: 65%

“…It was confirmed through a significant linear correlation between the values of the total phenolic content and the activity of the antioxidant extracts. 93 The results for the Rancimat method employing test samples were shown in Figure 11.…”

Section: Rancimat Methodsmentioning

confidence: 99%

Experimental evaluation over the effects of natural antioxidants on oxidation stability of binary biodiesel blend

Jeyakumar¹,

Huang

Balasubramanian

et al. 2022

Intl J of Energy Research

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“…Furthermore, based on the formation of new spots at Rf = 0.28 and Rf = 0.52 in thin layer chromatogram and the decreasing cytotoxicity of F3 at a dose of 15 kGy, it can be assumed that radiation could reduce the cytotoxic ability of the components in F3. This decrease may occur in the degradation of curcumin compound into other compounds caused by radiation effect [14,25].…”

Section: Separation Of Ethyl Acetate Extract By Column Chromatographymentioning

confidence: 99%

Antiproliferative Activity of Extracts and Fractions from Irradiated Curcuma zanthorrhiza Rhizomes Against Mouse Leukemia and Human Cancer Cell Lines

Winarno

Susanto

2019

Atom Indo.

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Human cancer cell linesCurcuma zanthorrhiza Roxb. is a medicinal plant that is used as a raw material in the herbal medicine and pharmaceutical industries. The main content of C. zanthorrhiza is curcuminoid, which is used as an antioxidant and an anticancer agent. The aim of this research was to study the effect of gamma radiation used for preserving simplicia or herbal drugs through the examination of their cytotoxicity against mouse leukemia L1210 cells and antiproliferative activity against human cancer cell lines HUT78, A549, HeLa, and THP1. The samples of curcuma rhizome were irradiated by gamma ray emitted by Cobalt-60 as a source at doses of 0 (control), 5, 7.5, 10, and 15 kGy. After irradiation, the samples were macerated using n-hexane, ethyl acetate, and ethanol, respectively. Preliminary cytotoxicity test toward extract from control sample against mouse leukemia L1210 cells revealed that the ethyl acetate extract was the most active extract inhibiting the growth of cells with an IC 50 value of 16.6 µg/mL, followed by ethanol extract (18.8 µg/mL) and n-hexane extract (42.7 μg/mL). Fractionation using a chromatography column of the ethyl acetate extract resulted in seven fractions denoted as F1-F7. The cytotoxicity test of the seven fractions against mouse leukemia L1210 cells showed that fraction 3 (F3) was the most active fraction with an IC 50 value of 10.0 μg/mL, followed by F7 (11.2 μg/mL), F6 (11.8 μg/mL), F5 (12.0 μg/mL), F1 (13.2 μg/mL), F4 (14.5 μg/mL), and F2 (27.8 μg/mL), respectively. Based on these results, all irradiated samples were then extracted, fractionated, and tested for cytotoxicity in a similar manner. The result showed that irradiation of samples under doses up to 10 kGy can be used to preserve Curcuma zanthorrhiza simplicia without damaging its efficacy. To ensure that the irradiation dose of 10 kGy did not reduce anticancer activity, the F3 from the irradiated sample at a dose of 10 kGy was also examined of its in-vitro antiproliferative activity using HUT78, A549, HeLa, and THP1 human cancer cell lines. The results showed that irradiation of the sample at a dose of 10 kGy reduced the antiproliferative activity of F3 against HUT78 (32 %), A549 (48 %), HeLa (42 %), and THP1 (31 %). However, its reduction did not eliminate its antiproliferative activities. These results indicated that the preservation of simplicia using radiation can be done at a maximum radiation dose of 10 kGy by modifying the concentration of simplicia in the fabrication process of herbal medicine formulation.

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“…In addition, blanched mushrooms resulted in lower levels of nutraceuticals and lower values of antioxidant activity than raw mushrooms prepared for consumption. Kortei et al (2014) studied gamma irradiation between 0.5-2.0 kGy doses and reported an increase in phenolic, flavonoid, and antioxidant content between 0.5 and 1.0 kGy doses. Huang et al (2015) studied the effect of UV-B light irradiation on the amount of vitamin D2 content of edible fruiting bodies and mycelia of five Pleurotus spp., and their antioxidant properties.…”

Section: Post-harvest Treatments For Increasing Nutraceutical Value Of P Ostreatusmentioning

confidence: 99%

Evaluation of Nutritional and Medicinal Values of Edible Wild and Cultivated Pleurotus ostreatus

Bulam

Üstün

Pekşen

2019

Turkish JAF Sci.Tech.

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Because of its high nutritional value and pharmaceutical effects, oyster mushroom (Pleurotus ostreatus (Jacq. ex Fr.) P. Kumm.) is collected from nature and cultivated in large scale. This therapeutic mushroom is consumed as a functional food or food additive in soups, cereal and dairy products, and commercially used in nutraceuticals and dietary supplements. The mycochemicals including polysaccharides (crude fiber and β-glucans), essential amino acids, ergothioneine, peptides, (glyco)proteins, lectins, phenolic compounds, polyketides (lovastatin), (tri)terpenoids, and enzymes are naturally found in the fruiting bodies and mycelial biomass of P. ostreatus. The major bioactive compounds concentration of this mushroom may be increased by modification of the substrate composition and cultivation or postharvest conditions. The goal of this review is to evaluate the results of the studies about the biochemical composition and medicinal properties of edible wild and cultivated P. ostreatus. Furthermore, the advanced novel cultivation techniques, biotechnological processes, and postharvest treatments were given in order to increase its nutritional and nutraceutical values.

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Evaluating the Effect of Gamma Radiation on the Total Phenolic Content, Flavonoids, and Antioxidant Activity of Dried Pleurotus ostreatus ((Jacq. ex. Fr) Kummer) Stored in Packaging Materials

Cited by 12 publications

References 48 publications

Experimental evaluation over the effects of natural antioxidants on oxidation stability of binary biodiesel blend

Experimental evaluation over the effects of natural antioxidants on oxidation stability of binary biodiesel blend

Antiproliferative Activity of Extracts and Fractions from Irradiated Curcuma zanthorrhiza Rhizomes Against Mouse Leukemia and Human Cancer Cell Lines

Evaluation of Nutritional and Medicinal Values of Edible Wild and Cultivated Pleurotus ostreatus

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