Anitmicrobial washing and coating technology for extending freshness of carrot
Yong-Joon Yang, Mi-Ran Yoo, and Kyoung-Ja Kim
Abstracts of 27th International Horticultural Congress & Exhibition (IHC 2006), August 13-19, 2006, COEX (Convention & Exhibition), Seoul, Korea. 494 pages.
2006
บทคัดย่อ
To investigate the effect of washing treatment on decay of carrot slices, various solutions were tested. The most effective treatments for maintaining market quality of carrot slices used 2% thiabendazole and 5% sodium hypochlorite Microorganisms isolated from decayed carrot were identified by 16s rDNA nucleotide sequencing and physiological characterizations as Erwinia carotovora, Rhizopus oryzae, and Phomopsis mail. To improve antimicrobial effect of chitosan, 2% chitosan in 0.5% acetic was ultrasonicated at 15 kHz, 30 W and several compounds were added to this solution. An electron microscope was used to examine chitosan treated spores of Rhizopus oryzae that were swollen and distorted. Ultrasonicated 2% hitosan in 0.5% acetic acid containing 0.5% potassium sorbate, 1.0% lauric acid 10% Triton X-100 resulting in the most effective treatment to maintain overall market quality of sliced carrot dehydration, decay, and loss of peel color.