کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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4562615 | 1330722 | 2010 | 5 صفحه PDF | دانلود رایگان |

The physicochemical properties of Ca2+-treated gellan films plasticized with glycerol were investigated as a function of CaCl2 concentration (0–20%, w/w) in an aqueous soaking solution. Films were examined based on their mechanical properties, water vapor permeability (WVP), swelling index (SI), thickness and opacity. The SI was lower for Ca2+-treated films relative to a control, however, above 13% (w/w) CaCl2 no differences in SI were found. At 13% (w/w) CaCl2, tensile and puncture strengths reached a maximum. Tensile elongation, puncture deformation, film thickness and WVP were lower for CaCl2-treated films than untreated, however, all increased with CaCl2 concentration. Opacity of gellan films increased with the Ca2+-treatment relative to the untreated film, however declined as CaCl2 concentration increased. In general, Ca2+-treated gellan films were stronger, acted as better water vapor barriers, swelled less when in contact with water, and became less pliable and transparent.
Journal: Food Research International - Volume 43, Issue 5, June 2010, Pages 1439–1443