کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1884148 | 1043329 | 2012 | 7 صفحه PDF | دانلود رایگان |
Whole plant of Fagonia arabica with 3 different particle sizes (30, 50 and 70 mesh) were exposed to gamma radiation doses of 1–10 kGy from a Cobalt 60 source. A series of tests was performed in order to check the feasibility of irradiation processing of the plant. The applied radiation doses did not affect (P<0.05) pH and antimicrobial activities of the plant. The total weight of the dry extracts in methanol as well as water was found increased with irradiation. The irradiated samples showed significant increase in phenolic content and free radical scavenging activity using DPPH. Shortly after irradiation (on the day of radiation treatment) high amounts of free radicals were detected in the irradiated plant samples and the chemiluminescence measurements were generally found to be dose dependent. Maximum luminescence intensity was observed in case of samples with mesh size of 30 for all the radiation doses applied. After a period of one month the chemiluminescence signals of the irradiated samples approximated those of the controls. The study suggests that gamma irradiation treatment is effective for quality improvement and enhances certain beneficial biological properties of the treated materials.
► Efficacy of gamma irradiation as a phytosanitary treatment was studied.
► Free radicals produced during irradiation do not persist and diminish upon storage.
► Irradiation enhanced certain beneficial biological & physicochemical activities.
► Yields of methanolic and aqueous extracts of treated samples were increased.
► No significant differences in antibacterial activity, as influenced by gamma irradiation were noted.
Journal: Radiation Physics and Chemistry - Volume 81, Issue 6, June 2012, Pages 679–685