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Investigation of fatty acid thermal transitions and stability in poultry pates enriched with vegetable components

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Abstract

The aim of the study was to describe the thermal characteristics of poultry pates enriched with vegetable components in relation to their chemical composition and technological process. Two poultry pates from chicken liver, chicken or turkey meat with vegetables were developed. The thermal characteristics of the raw materials and the ready pates were examined by differential scanning calorimetry; fatty acid profiles were detected by gas chromatography analysis. The study investigated the effect of such factors as heating/cooling rate and matrix effect of other components (e.g., proteins) in the raw materials and in the pates. It was observed that the cooling rate has a considerable effect on melting/crystallization temperature, enthalpy, and height of peaks in the process of pates fat crystallization, as well as peak height and enthalpy in the melting process. The first peaks formed during the crystallization were characterized by high instability, demonstrated by various peak shapes. The rapid cooling led to lowering of the melting point, assigned to the presence of unstable α crystals. The slow cooling led to mainly stable β′ crystals. The fraction of unsaturated fatty acids present in the fat was important for both crystallization rate and melting points in the raw materials and in the products as well. This effect was stronger in the pate products because of the presence of diverse components such as proteins. The results obtained could be used for the evaluation of thermal stability of pate fatty acids and further optimization of the pate thermal treatment.

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Acknowledgements

The study was supported by the Project No. HTAI129 (Formulation and Design of Food-products and Beverages for Preventive Nutrition) of Agricultural Academy of Bulgaria.

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Authors and Affiliations

  1. Department of Physics, Faculty of Physics and Technology, University of Plovdiv Paisii Hilendarski, Plovdiv, Bulgaria

    Maria Marudova

  2. Food Research and Development Institute (FoodRDI), Plovdiv, Bulgaria

    Maria Momchilova & Gabor Zsivanovits

  3. Department of Chemical Technology, Faculty of Chemistry, University of Plovdiv Paisii Hilendarski, Plovdiv, Bulgaria

    Ginka Antova & Zhana Petkova

  4. Department of Meat and Fish Technology, University of Food Technology, Plovdiv, Bulgaria

    Dinko Yordanov

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  1. Maria Marudova
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  2. Maria Momchilova
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  3. Ginka Antova
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  4. Zhana Petkova
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  6. Gabor Zsivanovits
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Correspondence to Maria Marudova.

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Marudova, M., Momchilova, M., Antova, G. et al. Investigation of fatty acid thermal transitions and stability in poultry pates enriched with vegetable components. J Therm Anal Calorim 133, 539–547 (2018). https://doi.org/10.1007/s10973-017-6841-z

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  • DOI: https://doi.org/10.1007/s10973-017-6841-z

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