ISHS


Acta
Horticulturae
Home


Login
Logout
Status


Help

ISHS Home

ISHS Contact

Consultation
statistics
index


Search
 
ISHS Acta Horticulturae 566: II International Symposium on Application of Modelling as an Innovative Technology in the Agri-Food Chain; MODEL-IT

RESPONSE SURFACE MODEL FOR PREDICTING THE BEHAVIOUR OF YERSINIA ENTEROCOLITICA IN PANEER, A HEAT AND ACID COAGULATED MILK PRODUCT OF INDIA

Authors:   A. Jagannath, M.N. Ramesh, M.C. Varadaraj
Keywords:   Pathogen, predictive model, Multivariate analysis, Traditional milk product
DOI:   10.17660/ActaHortic.2001.566.63
Abstract:
Paneer is a popular heat and acid coagulated Indian milk product analogous to the western cottage cheese. It is prepared by coagulating milk with citric acid and pressing the resulting curd into cubes. The product has a shelf life of 6 days at 10C. The present study evolved a predictive model to assess the fate of Yersinia enterocolitica MTCC 859, a foodborne pathogen of global concern, introduced as a post-processing contaminant in paneer. The experimental design used in this study was a complete 3 x 3 x 3 factorial of initial inoculum (1.3, 2.3 and 3.3 log10 CFU/g), storage temperature (4, 8 and 12C) and storage period (2, 4 and 6 days). Irrespective of the influencing variables, during storage of paneer, the strain of Y. enterocolitica showed an increase in number from its initial level of contamination. Polynomial regression equations were used to predict the populations of the pathogen within the experimental domain. The predicted values showed a good agreement with the experiment values. The values obtained for the statistical indices like root mean square (RMSE), coefficient of determination (R2), bias and accuracy factors established the adequacy of the derived model to predict the populations of Y. enterocolitica in paneer. Response surface model was generated to predict the behaviour of this pathogen over the range of variables within the experimental domain.

Download Adobe Acrobat Reader (free software to read PDF files)

566_62     566     566_64

URL www.actahort.org      Hosted by KU Leuven      © ISHS