Food and Fermentation Industries >

2022 , Vol. 48 >Issue 10: 188 - 193

DOI: https://doi.org/10.13995/j.cnki.11-1802/ts.028121

Effects of ultra-high pressure on absorption properties of kelp and its preliminary mechanism

  • YANG Rong ,
  • WANG Yifan ,
  • WANG Chao ,
  • DUAN Hanying
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  • 1(International School, Jinan University, Guangzhou 510632, China)
    2(College of Science＆Engineering, Jinan University, Guangzhou 510632, China)

Received date: 2021-05-31

  Revised date: 2021-06-16

  Online published: 2022-06-10

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Abstract

In this study, slice kelp (S-K) and powder-kelp (P-K) were treated with different pressures (300, 450 and 600 MPa) and time (5 and 10 min) in order to explore the effects of ultra-high pressure (UHP) treatments on kelp absorbability. The changes of water holding capacity (WHC), oil holding capacity (OHC), glucose adsorption capacity (GAC), cholesterol adsorption capacity (CAC) were compared to further infer the preliminary mechanism, dietary fiber (DF) content, composition and microstructure of kelp. The results showed that the WHC, OHC, and GAC of P-K after UHP treatment were significantly increased by 2.31, 2.33 and 11.33 times, respectively (P<0.05). CAC increased slightly but had no significant changes. With the increase of pressure and time, WHC and OHC gradually increased, however, GAC and CAC were first increased and then decreased. The adsorption properties of S-K were poor and the effect of UHP on it was not obvious. In further analysis, the total DF content of kelp after UHP treatment was significantly increased, and the insoluble and soluble DF contents were significantly increased after treatment for 5 and 10 min, respectively (P<0.05). Moreover, the results of scanning electron microscopy showed that the surface of UHP treated P-K was rough and the structure was loose. With the increase of pressure, the aggregation phenomenon of P-K would occur, which affected its absorbability.

Key words： kelp; dietary fiber; ultra-high pressure; absorption properties; structural properties

Cite this article

YANG Rong , WANG Yifan , WANG Chao , DUAN Hanying . Effects of ultra-high pressure on absorption properties of kelp and its preliminary mechanism[J]. Food and Fermentation Industries, 2022 , 48(10) : 188 -193 . DOI: 10.13995/j.cnki.11-1802/ts.028121

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