期刊名称：Journal of Materials and Environmental Science
印刷版ISSN：2028-2508
出版年度：2019
卷号：10
期号：12
页码：1-7
出版社：University of Mohammed Premier Oujda
摘要：Antioxidant plays an important role in inhibiting and scavenging free radicals, thus,
providing protection to human against inflammation diseases. Now the modern research is
directed towards “Natural antioxidants” from the herbal plants due to safe therapeutic. The
aim of the present research was to evaluate the antioxidant activity in vitro of the 95 %
ethanol extract of the resin exudates of trunk bark of Boswellia dalzielii (EERBD). In
addition, quantitative estimation of tannin content and phenolic content was also measured
by colorimetric methods, using vanillin and Folin–Ciocalteu reagent, respectively. The
antioxidant activity were determined by using different in vitro models including 2, 2-
diphenyl-1-picrylhydrazyl (DPPH*
), superoxide radical scavenging capacity and ferric ion
reducing antioxidant power (FRAP) assays. The dosage of both phenols and tannins of
EERBD revealed content in total phenols of 147 µg EAG/g Ex and total tannins of 0,0038
mg/g Ex respectively. Furthermore the EERBD exhibited the highest activity to DPPH
scavenging activity with an IC50 value of 178.12 mg /mL and a FRAP was found to be
147,85 mg/mL for ascorbic acid and then showed the strong antioxidant activity. The
strongest antioxidant activity of 95 % ethanol extract could be due to the presence of
phenols. Thus, the screening of the ethanol extract for potential antioxidants as source of
drugs for several diseases especially inflammation and cancers is illustrated. The assays
performed pointed out the EERBD to be a rich source of natural antioxidant components.
