03522nas a2200397 a 4500 20260817172219.0 160427s2013 th uu|m rtt 0| a1eng d .b12163181 AIT Thesis no.FB-13-02 Sadiq, Muhammad Bilal Carboxymethylatation of kappa carrageenan and evaluation of physicochemical and antibacterial activities Pathum Thani, Thailand : Asian Institute of Technology, 2013 1 online resource (59 leaves) : ill. (some col.) + 1 online resource Thesis ; no.FB-13-02 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 Thesis (M. Sc.) - Asian Institute of Technology, 2013 The aim of this study was to modify the kappa carrageenan(seaweed sulphated polysaccharides)to carboxymethylatedkappa carrageenan in order to achieve the kappa carrageenan derivative with modified physicochemicaland biological properties. The carboxymethylatedkappa carrageenanswere synthesized at differentconditions of temperature, concentration of alcohol,sodium hydroxide and proportion of chloroacetic acid. The temperaturesand concentrationsof each componentproduce different degree of biological activityforcarboxymethylated kappa carrageenan. The introduction of carboxymethyl group improved the antimicrobial,antioxidant and gelling ability of kappa carrageenan. The formation of carboxymethylated kappa carrageenan was confirmed by using theFouriertransform infrared spectroscopy (FTIR)analysis of samples. The antimicrobial effectsof carboxymethylated kappa carrageenan indicated that they were effective and had potential to inhibit the growth of both gram positive(Lactobacillus plantarum and Staphylococcus aureus)and gram negative(E. coli and Salmonella)bacteria.The carboxymethylated kappa carrageenan with improved antimicrobial, antioxidant, and rheological profile can be used in food and pharmaceutical industries and can reduce the use of various synthetic chemical preservativewhich are associated with various health hazards. Anti-infective agents Anal, Anil Kumar, Chairperson Athapol Noomhorm, Examination Committee Muanmai Apintanapong, Examination Committee Higher Education Commission (HEC) Pakistan, Scholarship Donor AIT Fellowship, Scholarship Donor Asian Institute of Technology. Thesis ; no. no.FB-13-02 Full-Text http://203.159.5.9/ait-thesis/detail.php?q=B02816 .b12163181 mnait z 240405 0 160427 m a z 0 000:001:PDF:b1216318:002491:0:0:0:0:0:0 Abstract--AIT Thesis no.FB-13-02 n mnait mnait 20 Barcode : 30050120674253 CREATED : 2016-04-27 RECORD # : i12957379 LPATRON : 1028546 LCHKIN : 2019-11-26 # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 4 TOT RENEW : 0 Barcode : 30050120671283 CREATED : 2016-04-27 RECORD # : i12957380 LPATRON : 1028262 LCHKIN : 2019-09-09 # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 1 TOT RENEW : 1 15236 15236 0 0 0 0 MAIN MAIN mnait 2026-08-17 50.00 0 AIT Thesis no.FB-13-02 30050120674253 2026-08-17 17:22:19 1 2026-08-17 20 0 0 0 0 MAIN MAIN mnait 2026-08-17 50.00 0 AIT Thesis no.FB-13-02 30050120671283 2026-08-17 17:22:19 2 2026-08-17 20