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In vitro antioxidant activities of ethanol extract from Enhalus acoroides (L.F.) Royle

Asian Pacific Journal of Tropical Medicine 2010年第11期3卷 898-901页

作者： rengasamy ragupathi raja kannan rajasekaran Arumugam Perumal Anantharaman CAS in Marine Biology Faculty of Marine SciencesAnnamalai UniversityParangipettai-608 502India

Objective:To search for new sources of safe and inexpensive antioxidants,the leaf,root and rhizome of Enhalus acoroides(***) were screened for the first time for their antioxidant ***:Samples of leaf,root and rhizome from *** were tested for total phenolic content,proanthocyanidins and in vitro antioxidant activity in terms of total antioxidant assay,DPPH assay and FRAP ***:The leaf sample was found to have high levels of phenolic(0.323±0.028 mg TAE/g) and proanthocyanidins(0.570 0±0.000 3 mg TAE/g) when compared to root and *** leaf samples exhibited higher total antioxidant activity (11.770±0.026 mg Ascorbic acid equivalent/g),higher percentage of DPPH radical scavenging activity(25.76±0.04) and higher reducing power(18.060±0.073) in terms of mg GAE/*** addition, there was a significant correlation between total phenolic content and total antioxidant activity (R^2=0.923),DPPH assay(R^2=0.509).FRAP assay(R^2=0.994).Similarly,significant correlation was found between the proanthocyanidin and total antioxidant activity(R^2=0.977),DPPH assay (R^2=0.464) and the FRAP assay(R^2=0.998).Conclusions:These results suggested that *** have strong antioxidant *** study is necessary for isolation and characterization of the active antioxidant agents,which can be used to treat various oxidative stress-related diseases.

关键词： Enhalus acoroides Antioxidant activity Phenolic content DPPH(2,2-Diphenyl-1-picrylhydrazyl) FRAP assay

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Antibacterial potential of three seagrasses against human pathogens

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Asian Pacific Journal of Tropical Medicine 2010年第11期3卷 890-893页

作者： rengasamy ragupathi raja kannan rajasekaran Arumugam Perumal Anantharaman CAS in Marine Biology Faculty of Marine SciencesAnnamalai UniversityParangipettai-608 502TamilnaduIndia

Objective:To evaluate the antibacterial activity of Halophila stipulacea(***), Cymodocea serrulata(***) and Halodule pinifolia(***) against seven human bacterial ***:The antibacterial activities of the extracts on the various test organisms using disc diffusion method and Minimum Inhibitory Concentraction(MIC).Results: Methanol and chloroform extracts of all the three seagrasses were active against all the tested pathogens,whereas the hexane extract of seagrasses was not active against Staphylococcus aureus (***).Antibacterial activity of three seagrass screened,was in the order of *** > ***.> ***:This antibacterial studies can further investigated on seagrasses for purification of bioactive substance and its possible utility in disease control.

关键词： Seagrass Halophila stipulacea Cymodocea serrulata Halodule pinifolia Antibacterial activity MIC

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