Evaluation of the Antioxidative Characteristics from Cinnamomum insularimontanum Hayata

• Main Authors: Su, HSIANG-LING, 蘇香伶
• Other Authors: LI, CHENG-TA
• Format: Others
• Language: zh-TW
• Published: 2018
• Online Access: http://ndltd.ncl.edu.tw/handle/7t9pdc

碩士 === 輔英科技大學 === 保健營養系碩士班 === 106 === Cinnamomum insularimontanum Hayata is a medium-sized evergreen tree, which grows in Taiwan, Indonesia and neighboring regions. Since ancient times, cinnamons were known for their antipyretic and anti-inflammatory effects. With aromatic properties, cinnamons were widely used as spices, and also considered as economically important plants. Recent studies indicated that Lauraceae plants not only have antibacterial and antioxidative properties, but inhibition of cancer cell proliferation and diabetes glucose control, etc. However, rare studies on the chemical com-positions and antioxidative properties of C. insularimontanum Hayata have been explored. In this study, the antioxidant activities of the ex-tracts by different solvents from the leaves, branches, barks and stems of C. insularimontanum were studied. Various analytic assays, including DPPH radical scavenging capacity, reducing power, ferrous ions chelating assay, total phenols and flavonoids contents were determined. Results indicated that ethanolic extracts from branch and bark of C. insularimontanum had better DPPH radical scavenging capacity 89.11% and 87.94% clearance rate than others (p <0.05). In addition, aqueous ex-tracts from branch and bark of C. insularimontanum had better reducing power 1266.47 μg/mL AAE, ferrous ions chelating capability 95.32%, and 93.02% chelation rate than others (p <0.05). Extracts from bark of C. insularimontanum had highest total phenol contents 652.63 and 655.16μg/ mL GAE than others. On the other hand, extracts from leaves of C. insu-larimontanum had highest flavonoid contents 330.58 and 223.61μg/mL QE than others (p<0.05). In conclusion, antioxidant effects of extracts from branch and bark of C. insularimontanum were much better than others (p <0.05). The results of volatile analysis and antioxidant analysis showed that the GC/SM analysis of C. insularimontanum essential oil had the highest ratio of Eucalyptol among monoterpene compounds with the DPPH free radical scavenging ability of 79% clearance rate, and reducing power of 1266.47 μg/mL AAE (p<0.05). Essential oil had higher total phenol contents of 338.36 μg/mL GAE and higher flavonoid contents of 155.27 μg/mL QE (p<0.05). C. insularimontanum extracts could be de-veloped as more potentially economical applications in agricultural, cos-metic and food products in the future.