naa a22 4500 510724388 CHVBK 20180411082929.0 cr unu---uuuuu 180411e20130601xx s 000 0 eng 10.1007/s11947-012-0822-9 doi (NATIONALLICENCE)springer-10.1007/s11947-012-0822-9 Development of Tapioca Starch/Decolorized Hsian-Tsao Leaf Gum-Based Antimicrobial Films: Physical Characterization and Evaluation Against Listeria monocytogenes [Elektronische Daten] [Chien-Hsien Chen, Wen-Shiuh Kuo, Lih-Shiuh Lai] The physical properties and antimicrobial activities against Listeria monocytogenes of the tapioca starch/decolorized hsian-tsao leaf gum (the polysaccharide gum extracted from hsian-tsao herb followed by removing the color matters, abbreviated as dHG hereafter)-based films incorporated with potassium sorbate (KS) or the ethanolic extract of thyme (TH) were investigated. It was found that the cross-sectional microstructure of starch/dHG films with KS showed some rough texture, and films with TH showed a relatively smooth microstructure with dispersed microparticles. The equilibrium moisture content and water vapor permeability of starch/dHG films with 20% KS (based on the weight of starch/dHG) was higher than the others tested, possibly due to the plasticizing effect of KS. In general, the tensile strength and tensile modulus decreased with increasing antibacterial concentration. As compared with the KS solutions, the TH solutions showed a pronounced antimicrobial activity against L. monocytogenes as determined by the inhibition zone test. However, the antimicrobial migration of both KS and TH in the starch/dHG matrix was limited to a certain extent, as evidenced by the significantly lower antimicrobial activity in the film system. When applying the starch/dHG films with antimicrobials to the fresh beef slices, all samples showed detectable improvement against the growth of L. monocytogenes, implying that starch/dHG films incorporated with TH or KS were effective against L. monocytogenes in conjunction with some modification of the physical properties due to the interactions between the antimicrobials and the components of film matrix. Springer Science+Business Media, LLC, 2012 Starch/dHG edible film nationallicence Potassium sorbate nationallicence Thyme extract nationallicence Mechanical properties nationallicence Barrier properties nationallicence Antimicrobial activity nationallicence Chen Chien-Hsien Department of Food Science and Biotechnology, National Chung Hsing University, 250 Kuo-Kuang Rd., 402, Taichung, Taiwan aut Kuo Wen-Shiuh Department of Safety, Health, and Environmental Engineering, National United University, 360, Miao-Li, Taiwan aut Lai Lih-Shiuh Department of Food Science and Biotechnology, National Chung Hsing University, 250 Kuo-Kuang Rd., 402, Taichung, Taiwan aut Food and Bioprocess Technology Springer-Verlag 6/6(2013-06-01), 1516-1525 1935-5130 6:6<1516 2013 6 11947 https://doi.org/10.1007/s11947-012-0822-9 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11947-012-0822-9 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Chen Chien-Hsien Department of Food Science and Biotechnology, National Chung Hsing University, 250 Kuo-Kuang Rd., 402, Taichung, Taiwan aut NATIONALLICENCE 700 1- Kuo Wen-Shiuh Department of Safety, Health, and Environmental Engineering, National United University, 360, Miao-Li, Taiwan aut NATIONALLICENCE 700 1- Lai Lih-Shiuh Department of Food Science and Biotechnology, National Chung Hsing University, 250 Kuo-Kuang Rd., 402, Taichung, Taiwan aut NATIONALLICENCE 773 0- Food and Bioprocess Technology Springer-Verlag 6/6(2013-06-01), 1516-1525 1935-5130 6:6<1516 2013 6 11947 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer