03193nas a2200409 a 4500 20260817162802.0 150617s2010 th uu|m rtt 0| a1eng d .b12153515 AIT RSPR no.FB-10-01 Rehman, Zia Ur Antioxidant and antimicrobial activity of ultrasonic-assisted extracts of local longan fruit peel Pathum Thani, Thailand : Asian Institute of Technology, 2010 38 leave : ill. (some col.) Research Studies Project Report ; no. no.FB-10-01 A Research study submitted in partial fulfillment of the requirements for the Degree of Master of Science in Food Engineering and Bioprocess Technology, School of Environment, Resources and Development Research Studies Project Report (M. Eng.) - Asian Institute of Technology,2010 The longan sample was extracted with 95% ethanol by ultrasonic-assisited method. The total optimum phenolic contents of longan peel with the help of ultrasonic method were 48.48mg/g at extraction temperature of 600C which was kept for 60minutes while the least values was observed at extraction temperature of 400C for 40minutes which is 24.48mg/g of the extract being expressed as gallic acid equivalent. The sample was measured at 760nm by using Folin-Ciocalteu method. The kinetic properties of antioxidants were investigated by reacting specific quantity of extract with 2.2-diphenyl-1-picrylhydrazyl (DPPH) radical and the reducing power was determined by mixing the longan extract with a number of different chemical species. The highest scavenging activity was shown by the sample extracted on 600C, 60minutes. The extraction temperature of 60C and 60minutes extraction time were found tobe the optimum for antioxidants extraction The antibacterial activity of longan extract was tested against E.Coliand strong activity was observed with distinct inhibition zones around the wells Antioxidants Longan Rakshit, Sudip Kumar, Chairperson Athapol Noomhorm, Examination Committee Anal, Anil Kumar, Examination Committee University of Balochistan, Quetta Pakistan Asian Institute of Technology Fellowship, Scholarship donor Asian Institute of Technology. RSPR ; no. no.FB-10-01 Full-Text http://203.159.5.9/ait-thesis/detail.php?q=B00062 .b12153515 mnait z 240404 0 150617 m a z 0 000:001:PDF:b1215351:002197:0:0:0:0:0:0 Abstract--AIT RSPR no.FB-10-01 n mnait mnait 20 Barcode : 30050120612923 CREATED : 2015-06-17 RECORD # : i12852363 LPATRON : 0 LCHKIN : - # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 0 TOT RENEW : 0 Barcode : 30050120612956 CREATED : 2015-06-17 RECORD # : i12852375 LPATRON : 1015151 LCHKIN : 2018-07-07 # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 1 TOT RENEW : 0 6285 6285 0 0 0 0 MAIN MAIN mnait 2026-08-17 50.00 0 AIT RSPR no.FB-10-01 30050120612923 2026-08-17 16:28:02 1 2026-08-17 20 0 0 0 0 MAIN MAIN mnait 2026-08-17 50.00 0 AIT RSPR no.FB-10-01 30050120612956 2026-08-17 16:28:02 2 2026-08-17 20