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008 150617s2010 th uu|m rtt 0| a1eng d
035 _a.b12153515
099 9 _aAIT RSPR no.FB-10-01
100 1 _aRehman, Zia Ur
245 1 0 _aAntioxidant and antimicrobial activity of ultrasonic-assisted extracts of local longan fruit peel
260 _aPathum Thani, Thailand :
_bAsian Institute of Technology,
_c2010
300 _a38 leave :
_bill. (some col.)
490 1 _aResearch Studies Project Report ;
_vno. no.FB-10-01
500 _aA 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
502 _aResearch Studies Project Report (M. Eng.) - Asian Institute of Technology,2010
520 _aThe 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
650 0 _aAntioxidants
650 0 _aLongan
700 1 _aRakshit, Sudip Kumar,
_eChairperson
700 0 _aAthapol Noomhorm,
_eExamination Committee
700 1 _aAnal, Anil Kumar,
_eExamination Committee
710 2 _aUniversity of Balochistan, Quetta Pakistan
710 2 _aAsian Institute of Technology Fellowship,
_eScholarship donor
810 2 _aAsian Institute of Technology.
_tRSPR ;
_vno. no.FB-10-01
856 _3Full-Text
_uhttp://203.159.5.9/ait-thesis/detail.php?q=B00062
907 _a.b12153515
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_cz
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962 _a000:001:PDF:b1215351:002197:0:0:0:0:0:0
_tAbstract--AIT RSPR no.FB-10-01
_vn
945 _lmnait
945 _lmnait
942 _c20
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