Modeling of Changes in Physicochemical, Textural and Sensory Properties of Fortified Yoghurt with Zinc and Iron by Artificial Neural Networks

Hosseinnejad, Mahmod; Jafari, Seid Mahdi; Ganje, Mohammad

doi:10.22101/JRIFST.2017.02.26.001

Modeling of Changes in Physicochemical, Textural and Sensory Properties of Fortified Yoghurt with Zinc and Iron by Artificial Neural Networks

Document Type : Original Paper

Authors

¹ M.Sc Graduate, Faculty of Food Science, University of Agricultural Sciences and Natural Resources, Gorgan, Iran

² Associate Professor, Faculty of Food Science, University of Agricultural Sciences and Natural Resources, Gorgan, Iran

³ PhD student, Faculty of Food Science, University of Agricultural Sciences and Natural Resources, Gorgan, Iran

10.22101/JRIFST.2017.02.26.001

Abstract

In this study, yogurt was fortified with iron and zinc in equal concentrations, 20, 40 and 60 mg per 1 kg of milk and the samples were tested in 1, 7 and 14 days of storage in terms of different properties of product including physicochemical properties (acidity, pH, syneresis, water holding capacity, viscosity), textural properties (hardness, elasticity, firmness, cohesiveness, adhesiveness) and sensory properties (texture, flavor, color, odor and acceptance). For predicting the changes in qualitative indices, neural network tool in MATLAB 2013Ra was used. In different networks, the Feed-Forward-Back-Propagation networks by 2-2-3-14 and 2-4-14 topology, with 0.997 and 0.991 correlation coefficients and 0.4090 and 0.1040 mean square errors, including hyperbolic tangent sigmoid transfer function, Levenberg-Marquardt learning algorithm and 1000 epoch was determined as the best neural models for yoghurt fortified with Fe and Zn, respectively. Optimal models were also investigated and the results of these models with high correlation coefficients (more than 0.98) and very low standard deviation were able to predict trends.

Keywords

References

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