Antioxidant properties of methanolic extracts of the leaves of seven Egyptian Cassia species.
In the present study, antioxidant activity of methanolic extracts of the leaves of seven Egyptian Cassia species was investigated using two methods, the phosphomolyb-date method and 1,1 diphenyl-2-picrylhydrazyl radical (DPPH) scavenging activity method.· The results revealed that C. glauca is the most potent species and that the activity of other plant species decreases in the following order: C. grandis > C. nodosa > C. fistula > C. didymobtrya > C. occidentalis > C. sophera. Defatted methanolic extract of the most active plant C. glauca was subjected to fractionation using different organic solvents such as CHCl3, EtOAc and BuOH. Antixidant activities of the fractions were investigated and the results showed that ethyl acetate fraction possessed high activity. Total phenolic and flavonoid concentrations of each plant extract were determined using the Folin-Ciocalteu reagent and aluminum chloride. Correlation between radical scavenging capacities of extracts and total phenolic concentration was observed.
Chemistry Department, Faculty of Science, Ain Shams University, Egypt.
Maher Mahmoud
MM
El-Hashash
Mahfouz Mohamed
MM
Abdel-Gawad
Mortada Mohamed
MM
El-Sayed
Waffa Ahmed
WA
Sabry
El-Sayed Saleh
el-SS
Abdel-Hameed
Ezzat El-Sayed
Eel-S
Abdel-Lateef
D000975:Antioxidants / Q000302:isolation & purification / Q000494:pharmacology*; D001713:Biphenyl Compounds / Q000737:chemistry; D002366:Cassia / Q000737:chemistry*; D004534:Egypt; D005419:Flavonoids / Q000302:isolation & purification / Q000494:pharmacology; D016166:Free Radical Scavengers / Q000302:isolation & purification / Q000494:pharmacology; D000432:Methanol / Q000737:chemistry; D008982:Molybdenum / Q000737:chemistry; D010636:Phenols / Q000302:isolation & purification / Q000494:pharmacology; D010756:Phosphoric Acids / Q000737:chemistry; D010851:Picrates / Q000737:chemistry; D010936:Plant Extracts / Q000494:pharmacology*; D018515:Plant Leaves; D012997:Solvents / Q000737:chemistry
D000975:Antioxidants; D001713:Biphenyl Compounds; D005419:Flavonoids; D016166:Free Radical Scavengers; D010636:Phenols; D010756:Phosphoric Acids; D010851:Picrates; D010936:Plant Extracts; D012997:Solvents; D008982:Molybdenum; C004931:1,1-diphenyl-2-picrylhydrazyl; C003125:phosphomolybdic acid; D000432:Methanol