Open AccessModeling respiration rates of Ipomoea batatas (sweet potato) under hermetic storage system
Author(s) -
Seo Hyeon Han,
Han Dong Jang,
SeungJu Lee
Publication year - 2019
Publication title -
food science and biotechnology/food science and biotechnology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.595
H-Index - 38
eISSN - 2092-6456
pISSN - 1226-7708
DOI - 10.1007/s10068-019-00660-2
Subject(s) - ipomoea , modified atmosphere , respiration rate , respiration , uncompetitive inhibitor , gas composition , arrhenius equation , chemistry , composition (language) , atmosphere (unit) , function (biology) , horticulture , botany , analytical chemistry (journal) , food science , thermodynamics , environmental chemistry , activation energy , biochemistry , physics , biology , shelf life , enzyme , philosophy , non competitive inhibition , linguistics , evolutionary biology
The sweet potato respiration rate versus gas composition was mathematically modeled, as required to design an effective modified atmosphere packaging (MAP) system. Storage tests of sweet potato were conducted at 15-30 °C. The O 2 and CO 2 concentrations were measured over time in a closed system. The respiration rate was estimated to be a derivative of the quadratic function of gas concentration over time and decreased with decreasing O 2 and increasing CO 2 . The model of the uncompetitive inhibition enzyme reaction rate fitted well with the experimental results. The temperature dependency of the equation parameters (V m , K m , and K i ) followed the Arrhenius relationships. The use of the proposed models to simulate the respiration rates as a function of temperature revealed less temperature dependence in low O 2 and high CO 2 concentrations. This gas composition, more desirable in practice, also agreed with the typical gas composition of MAP.