TY - JOUR
T1 - In vitro antioxidant activities of Ziziphus spina-christi Fruits (red date) grown in Oman
AU - Singh, Vandita
AU - Guizani, Nejib
AU - Essa, Musthafa Mohamed
AU - Rahman, Mohamed Shafiur
AU - Selvaraju, Subash
PY - 2012
Y1 - 2012
N2 - Ziziphus spina-christi Fruits (ZSCF) have been used for human consumption for long time for medicinal purposes in many areas of the world and recommended for diseases in which free radical species are produced as a result of oxidative stress. However, there is lack of systematic study on the antioxidant capacities of ZSCF from Oman. The present study quantifies the Total Phenolic Content (TPC) and Total Flavonoid Content (TFC) and investigates the antioxidant ability of the ZSCF grown in the Sultanate of Oman. Antioxidant activity was assessed by using 2,2-azino-bis (3-ethylbenzothiazoline-6-sulphonic acid) assay (ABTS), 2,2-diphenyl-1-picrylhydrazyl (DPPH), Superoxide-radical Scavenging Activity (SRSA), ferric reducing/antioxidant power (FRAP assay), Total Reducing Power Ability (TRPA) and metal chelation assays. Overall the ZSCF showed strong antioxidant ability and high phenolic contents. TPC and TFC contents of ZSCF were 1644 mg Gallic Acid Equivalents (GAE) and 47 mg catechin equivalents (CEQ)/100 g of Dry Weight (DW), respectively. ZSCF showed potent radical scavenging activity in each assay, showing 91% in the ABTS method (at 429 μg mL -1), 51% in the DPPH radical scavenging method (at 140 mg mL -1) and 47% of inhibition in the Superoxide-radical scavenging assay (at 20 μgmL -1). The % chelating effect of ZSCF was 94% (at 100 μgmL -1). The observed antioxidant ability of ZSCF may be due to abundant presence of phenolic contents and high electron donating ability to neutralize free radicals.
AB - Ziziphus spina-christi Fruits (ZSCF) have been used for human consumption for long time for medicinal purposes in many areas of the world and recommended for diseases in which free radical species are produced as a result of oxidative stress. However, there is lack of systematic study on the antioxidant capacities of ZSCF from Oman. The present study quantifies the Total Phenolic Content (TPC) and Total Flavonoid Content (TFC) and investigates the antioxidant ability of the ZSCF grown in the Sultanate of Oman. Antioxidant activity was assessed by using 2,2-azino-bis (3-ethylbenzothiazoline-6-sulphonic acid) assay (ABTS), 2,2-diphenyl-1-picrylhydrazyl (DPPH), Superoxide-radical Scavenging Activity (SRSA), ferric reducing/antioxidant power (FRAP assay), Total Reducing Power Ability (TRPA) and metal chelation assays. Overall the ZSCF showed strong antioxidant ability and high phenolic contents. TPC and TFC contents of ZSCF were 1644 mg Gallic Acid Equivalents (GAE) and 47 mg catechin equivalents (CEQ)/100 g of Dry Weight (DW), respectively. ZSCF showed potent radical scavenging activity in each assay, showing 91% in the ABTS method (at 429 μg mL -1), 51% in the DPPH radical scavenging method (at 140 mg mL -1) and 47% of inhibition in the Superoxide-radical scavenging assay (at 20 μgmL -1). The % chelating effect of ZSCF was 94% (at 100 μgmL -1). The observed antioxidant ability of ZSCF may be due to abundant presence of phenolic contents and high electron donating ability to neutralize free radicals.
KW - Antioxidant activity
KW - Flavonoids
KW - Reducing Power
KW - Superoxide anion
KW - Ziziphus spina-christi Fruits
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UR - http://www.scopus.com/inward/citedby.url?scp=84867377388&partnerID=8YFLogxK
U2 - 10.3923/biotech.2012.209.216
DO - 10.3923/biotech.2012.209.216
M3 - Article
AN - SCOPUS:84867377388
SN - 1682-296X
VL - 11
SP - 209
EP - 216
JO - Biotechnology
JF - Biotechnology
IS - 4
ER -