Antioxidant capacity and total phenolic compounds of Vaucheria geminata (Vaucher) DC

Vuran, Veysel; Pabuçcu, Köksal; Demiriz, Tuba; Elmastaş, Mahfuz

doi:10.1016/j.jbiotec.2012.07.075

Cited by 2 publications

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“…The most important previous studies on the genus Vaucheria show its chemical compounds and their importance as antioxidants and antimicrobials according to the results of a spectrophotometer analysis of the total phenolic compounds present in a methanol extract of V. geminata, results were given as gallic acid equivalent (Vuran et al, 2012). In the study El-Tablawy et al (2020), HPLC chromatography was used to identify roughly seven varieties of each phenol and flavonoid chemical in the four algae (Vaucheria geminate, Pleurochloris pyrenoidosa, Botrydiopsis eriensis, and Scenedesmus obliquus).…”

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confidence: 99%

Assessment of antioxidant activity in Vaucheria sessilis extracts and their efficacy against isolated Candida spp. from diabetic foot ulcers

Al Knani,

Al Ashoor,

Hussein

2023

MSA

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This study was carried out in order to assess the biological efficacy of separated extracts of V. sessilis as an Antioxidant and antifungal against isolated candida spp. from diabetic foot ulcers. Several tests were used to identify the presence of active chemical compounds in V. sessilis and we note that the V. sessilis is rich in active substances. showed phytochemical results were found for the extracted ethanol 70% contain carbohydrates, flavonoids, phenols, alkaloids, glycosides, triterpenoid and saponin, and negative detection for Tannin, Steroid, and Amino acid. The antioxidant activity of V. sessilis extracts was assessed by decreasing the radical scavenging activity of (1,1-diphenyl-2-picrylhydrazyl (DPPH). Results exhibited that all extracts have antioxidant activity with different concentrations, showed the superiority of the polyphenol 86.02 % inhibition ratio at (1000 μg/ ml), flavonoid 84.05 % at (1000 μg/), and hexane extract 68.5 % at (1000 μg / ml) compared to ascorbic acid, which recorded 81.17% at a concentration of 1000 μg/ml. Whereas, the hexane extract recorded the lowest inhibition rate at (50 μg /ml). Efficacy showed of separated extracts from V. sessilis as antifungal activity using well diffusion plate method. The polyphenol extract (VP) was the highest activity against all isolated candida spp. from foot ulcers of diabetic patients, while the other extracts showed varying activity against different candida spp.at P. value < 0.01. The results that a high Zone rate of inhibition/mm 2 was (26.7 ± 0.6) against C. albicanis, while no inhibition/mm 2 (9.8± 0.8) for hexane extract against the same candida. HPLC analysis indicated the presence of 7 compounds in separated polyphenol extract of V.sessilis (Chlorogenic acid, Ferulic acid, Gallic acid, Rutin, Qurcetine, Kaempferol and Apigenin) with specific retention times. The detected compounds possess antioxidant and antimicrobial activities. These results suggested that separated extracts from V. sessilis have high antioxidant and antifungal activities. In the future, V. sessilis extracts could become one of the important alternatives in infection treatment, even if in a limited way due to the spread of candida spp. that are resistant to antifungals.

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Section: Introductionmentioning

confidence: 99%

Assessment of antioxidant activity in Vaucheria sessilis extracts and their efficacy against isolated Candida spp. from diabetic foot ulcers

Al Knani,

Al Ashoor,

Hussein

2023

MSA

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Antioxidant activities of some edaphic algae in Egypt

El-Tablawy

Mansour

Shaaban

2020

Beni-Suef Univ J Basic Appl Sci

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Background Algae in general characterized by their rich content of biological compounds. However, few studies were conducted on the soil-inhabiting algae and their antioxidant characteristics. Results The present study was designed to evaluate the antioxidant activity of four edaphic algae including one on-soil alga (Vaucheria geminata) and three axenic isolated in-soil algae (Pleurochloris pyrenoidosa, Botrydiopsis eriensis, and Scenedesmus obliquus). Total antioxidant activity by Phosphomolybdenum assay ranged from 6.66 to 36.33 mg of Asc/g dwt; meanwhile, the percentage inhibition of DPPH radical was up to 97.37%. Antioxidant activity of each alga was assessed also by measuring their contents of total phenols, flavonoids, and pigments (chlorophyll a and carotenoids). B. eriensis and S. obliquus recorded the highest levels of phenols, flavonoids, and chlorophyll a followed by P. pyrenoidosa and V. geminata, while B. eriensis showed the highest carotenoids content. Moreover, about seven types of each phenol and flavonoid compound were identified by HPLC chromatography in the four algae under investigation. The most common detected phenols were gallic, chlorogenic, caffeic, and ferulic, while rutin, quercetin, apigenin, and quercitrin were the most abundant flavonoids among all algae under investigation. Conclusion All the tested algae were characterized with high antioxidant activities besides the rich contents of compounds with antioxidant properties which recommend their further potential using in nutritional, pharmaceutical, and medicinal implications.

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Antioxidant capacity and total phenolic compounds of Vaucheria geminata (Vaucher) DC

Cited by 2 publications

References 0 publications

Assessment of antioxidant activity in Vaucheria sessilis extracts and their efficacy against isolated Candida spp. from diabetic foot ulcers

Assessment of antioxidant activity in Vaucheria sessilis extracts and their efficacy against isolated Candida spp. from diabetic foot ulcers

Antioxidant activities of some edaphic algae in Egypt

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