Please use this identifier to cite or link to this item: https://hdl.handle.net/11147/4763
Title: Potential application of hot rehydration alone or in combination with hydrogen peroxide to control pectin methylesterase activity and microbial load in cold-stored intermediate-moisture sun-dried figs
Authors: Demirbüker Kavak, Dilek
Şimşek, Şebnem
Yemenicioğlu, Ahmet
Demirbüker Kavak, Dilek
Şimşek, Şebnem
Yemenicioğlu, Ahmet
Izmir Institute of Technology. Food Engineering
Keywords: Fig
Hydrogen peroxide
Microbial load
Pectin methylesterase
Rehydration
Issue Date: Apr-2004
Publisher: John Wiley and Sons Inc.
Source: Demirbüker, D., Şimşek, Ş., and Yemenicioğlu, A. (2004). Potential application of hot rehydration alone or in combination with hydrogen peroxide to control pectin methylesterase activity and microbial load in cold-stored intermediate-moisture sun-dried figs. Journal of Food Science, 69(3), FCT170-FCT178. doi:10.1111/j.1365-2621.2004.tb13353.x
Abstract: Sun-dried figs contain a considerable amount of pectin methylesterase (PME) activity (22 μM COOH/ min/g). The enzyme causes softening and loss of desired gummy texture in cold-stored intermediate-moisture (IM) sun-dried figs brought to a 28% to 29% moisture range. Partial reduction of PME activity (28%) delayed undesirable textural changes in IM figs rehydrated at 80°C for 16 min. The heat treatment did not cause a considerable reduction in microbial load. However, the addition of 2.5% H2O2 to the rehydratlon medium at 80°C reduced the initial total mesophilic aerobic count of figs by at least 90% and turned the figs from a brown color to a desirable and stable yellow-light brown. The in situ fig catalase remains after rehydration at 80°C. Thus, by reducing the contact period of figs with H2O2 or by pureeing figs, it is possible to eliminate residual H2O2 and to obtain safe and SO2-free light-colored fig products.
URI: http://doi.org/10.1111/j.1365-2621.2004.tb13353.x
http://hdl.handle.net/11147/4763
ISSN: 0022-1147
0022-1147
Appears in Collections:Food Engineering / Gıda Mühendisliği
Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection

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