Effects of spray freeze drying and pulsed electric fields on fenugreek seed extract properties

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Published

2025-09-30

DOI:

https://doi.org/10.58993/ijh/2025.82.3.17

Keywords:

Pulsed electric field, spray freeze drying, encapsulation, gum acacia, plant extracts
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Issue

Vol. 82 No. 03 (2025): Indian Journal of Horticulture

Section

Research Articles

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Copyright (c) 2025 Butti Prabhakar, Raghupatruni Venkateswara Prasad

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This work is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License.

Authors

  • Butti Prabhakar College of Food Processing Technology & Bioenergy, Anand Agricultural University, Gujarat-388110
  • Raghupatruni Venkateswara Prasad College of Food Processing Technology & Bioenergy, Anand Agricultural University, Gujarat, 388110, India

Abstract

Plant extracts are increasingly recognized for their potential health benefits, creating a growing demand for efficient extraction and preservation methods. In this study, a pulsed electric field (PEF) system was applied to maximize the extraction of plant bioactives, followed by encapsulation using spray freeze drying (SFD), a novel preservation technique. Among solvents tested, ethanol yielded the highest extract recovery (166.66 mg GAE/g), whereas methanol (sample-to-solvent ratio 1:10) resulted in the highest total polyphenol content. In the encapsulation process, gum acacia (GUA) at a 1:6 extract-to-binder ratio with a 30-hour lyophilization period produced powders with the lowest moisture content (3.9% w.b.), and SFD particles exhibited an average size of 9.0 μm. Furthermore, GUA as a binder and guar gum at a 20-hour lyophilization period achieved the highest polyphenol encapsulation efficiency. These findings highlight PEF-assisted extraction combined with SFD encapsulation as a cost-effective and efficient strategy for industrial-scale preservation of plant bioactives.

How to Cite

Prabhakar, B., & Prasad, R. V. (2025). Effects of spray freeze drying and pulsed electric fields on fenugreek seed extract properties. Indian Journal of Horticulture, 82(03), 361–367. https://doi.org/10.58993/ijh/2025.82.3.17

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