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Effect of pH adjustment, homogenization and diafiltration on physicochemical, reconstitution, functional and rheological properties of medium protein milk protein concentrates (MPC70)

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Abstract

Poor solubility is the major limiting factor in commercial applications of milk protein concentrates (MPC) powders. Retentate treatments such as pH adjustment using disodium phosphate (Na2HPO4), also responsible for calcium chelation with homogenization and; its diafiltration with 150 mM NaCl solution were hypothesized to improve the functional properties of treated MPC70 powders. These treatments significantly improved the solubility, heat stability, water binding, dispersibility, bulk density, flowability, buffer index, foaming and emulsifying capacity of treated powders over control. Rheological behaviour of reconstituted MPC solutions was best explained by Herschel Bulkley model. Compared to rough, large globular structures with dents in control; majorly intact, separate, smaller particles of smooth surface, without any aggregation were observed in SEM micrograph of treated powders. Applied treatments are easy, cost-effective and capable to improve functional properties of treated powders that could replace control MPC70 powder in various food applications where protein functionality is of prime importance.

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Acknowledgements

The authors are very grateful to the Indian Council of Agricultural Research, New Delhi, India and Director, ICAR-National Dairy Research Institute, Karnal, India for providing the required facilities to carry out this work.

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Authors and Affiliations

  1. Dairy Technology Division, ICAR- National Dairy Research Institute, Karnal, 132001, India

    Ganga Sahay Meena, Ashish Kumar Singh, Vijay Kumar Gupta & Sanket Borad

  2. Dairy Chemistry Division, ICAR- National Dairy Research Institute, Karnal, 132001, India

    Sumit Arora

  3. Dairy Microbiology Division, ICAR- National Dairy Research Institute, Karnal, 132001, India

    Sudhir Kumar Tomar

Authors
  1. Ganga Sahay Meena
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  2. Ashish Kumar Singh
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  3. Vijay Kumar Gupta
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  4. Sanket Borad
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  5. Sumit Arora
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Correspondence to Ganga Sahay Meena.

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This study does not involve any human or animal testing.

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Meena, G.S., Singh, A.K., Gupta, V.K. et al. Effect of pH adjustment, homogenization and diafiltration on physicochemical, reconstitution, functional and rheological properties of medium protein milk protein concentrates (MPC70). J Food Sci Technol 55, 1376–1386 (2018). https://doi.org/10.1007/s13197-018-3052-y

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  • DOI: https://doi.org/10.1007/s13197-018-3052-y

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