title: Calibrations between the variables of microbial TTI response and ground pork qualities.
abstract: A time-temperature indicator (TTI) based on a lactic acid bacterium, Weissella cibaria CIFP009, was applied to ground pork packaging. Calibration curves between TTI response and pork qualities were obtained from storage tests at 2°C, 10°C, and 13°C. The curves of the TTI vs. total cell number at different temperatures coincided to the greatest extent, indicating the highest representativeness of calibration, by showing the least coefficient of variance (CV=11%) of the quality variables at a given TTI response (titratable acidity) on the curves, followed by pH (23%), volatile basic nitrogen (VBN) (25%), and thiobarbituric acid-reactive substances (TBARS) (47%). Similarity of Arrhenius activation energy (Ea) could also reflect the representativeness of calibration. The total cell number (104.9 kJ/mol) was found to be the most similar to that of the TTI response (106.2 kJ/mol), followed by pH (113.6 kJ/mol), VBN (77.4 kJ/mol), and TBARS (55.0 kJ/mol).
authors.affiliation: Department of Food Science and Technology, Dongguk University-Seoul, Seoul 100-715, Republic of Korea.
authors.forename: Eunji
authors.initials: E
authors.lastname: Kim
authors.forename: Dong Yeol
authors.initials: DY
authors.lastname: Choi
authors.forename: Hyun Chul
authors.initials: HC
authors.lastname: Kim
authors.forename: Keehyuk
authors.initials: K
authors.lastname: Kim
authors.forename: Seung Ju
authors.initials: SJ
authors.lastname: Lee
mesh_terms: D000818:Animals; D002138:Calibration; D015169:Colony Count, Microbial; D003116:Color; D005506:Food Contamination / Q000517:prevention & control; D005516:Food Microbiology; D018857:Food Packaging; D063427:Food Quality; D006863:Hydrogen-Ion Concentration; D007777:Lactobacillaceae / Q000254:growth & development / Q000302:isolation & purification*; D008460:Meat / Q000032:analysis / Q000382:microbiology*; D015203:Reproducibility of Results; D013552:Swine; D013696:Temperature; D017392:Thiobarbituric Acid Reactive Substances / Q000737:chemistry; D013997:Time Factors; D055549:Volatile Organic Compounds / Q000737:chemistry; D058836:Weissella / Q000254:growth & development / Q000302:isolation & purification
chemical_list: D017392:Thiobarbituric Acid Reactive Substances; D055549:Volatile Organic Compounds