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Combined impact of pulsed electric field and ultrasound on bioactive compounds and FT-IR analysis of almond extract

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Abstract

The aim of this paper is to investigate the combined impact of pulsed electric field (PEF) and ultrasound (US) to evaluate the physicochemical, bioactive compounds and chemical structure of almond extract. Almond extract was first treated with PEF and then with US. Combined treatment (PEF–US) has attained the highest value of total phenolics, total flavonoids, condense tannins, anthocyanin contents and antioxidant activity in DPPH, reducing power and metal chelating activity than all other treatments. Among all those treatments, there was slightly visible difference in the color. Moreover, FT-IR spectra indicate that the effect of PEF-US on almond extract did not produce new carbonyl compounds, but led to the higher concentration of these compounds. This study demonstrated that the PEF-US could be useful for the extraction of bioactive compounds as well as improving the stability of volatile compounds.

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Acknowledgement

This research was supported by the National “Thirteenth Five” Key Research Project (2017YFD0400502), the 111 Project (B17018), the National Natural Science Foundation of China (21576099) and the S&T projects of Guangdong Province (2017B020207001 and 2015A030312001). In addition, Muhammad Faisal Manzoor is in receipt of a financial support for PhD scholarship from the China Scholarship Council (CSC).

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Authors and Affiliations

  1. School of Food Science and Engineering, South China University of Technology, Guangzhou, Guangdong, 510640, China

    Muhammad Faisal Manzoor, Xin-An Zeng, Abdul Rahaman, Azhari Siddeeg, Rana Muhammad Aadil, Zahoor Ahmed, Jian Li & Debao Niu

  2. Overseas Expertise Introduction Center for Discipline Innovation of Food Nutrition and Human Health (111 Center), Guangzhou, China

    Muhammad Faisal Manzoor, Xin-An Zeng, Abdul Rahaman, Azhari Siddeeg, Zahoor Ahmed, Jian Li & Debao Niu

  3. Department of Food Engineering and Technology, Faculty of Engineering and Technology, University of Gezira, Wad Medani, Sudan

    Azhari Siddeeg

  4. National Institute of Food Science and Technology, University Agriculture Faisalabad, Faisalabad, 38000, Pakistan

    Rana Muhammad Aadil

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  1. Muhammad Faisal Manzoor
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  2. Xin-An Zeng
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  3. Abdul Rahaman
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Correspondence to Xin-An Zeng.

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Manzoor, M.F., Zeng, XA., Rahaman, A. et al. Combined impact of pulsed electric field and ultrasound on bioactive compounds and FT-IR analysis of almond extract. J Food Sci Technol 56, 2355–2364 (2019). https://doi.org/10.1007/s13197-019-03627-7

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  • DOI: https://doi.org/10.1007/s13197-019-03627-7

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