Structure, properties and potential bioactivities of high-purity insoluble fibre from soybean dregs (Okara)

Bo Lyu; Huan Wang; Mohammed Sharif Swallah; Hongling Fu; Yue Shen; Zengwang Guo; Xiaohong Tong; Yang Li; Hansong Yu; Lianzhou Jiang

doi:10.1016/j.foodchem.2021.130402

Structure, properties and potential bioactivities of high-purity insoluble fibre from soybean dregs (Okara)

Food Chem. 2021 Dec 1:364:130402. doi: 10.1016/j.foodchem.2021.130402. Epub 2021 Jun 18.

Authors

Bo Lyu¹, Huan Wang², Mohammed Sharif Swallah³, Hongling Fu³, Yue Shen⁴, Zengwang Guo⁵, Xiaohong Tong⁵, Yang Li⁵, Hansong Yu⁶, Lianzhou Jiang⁷

Affiliations

¹ College of Food Science, Northeast Agricultural University, Harbin 150030, China; Division of Soybean Processing, Soybean Research & Development Center, Chinese Agricultural Research System, Changchun 130118, China.
² College of Food Science, Northeast Agricultural University, Harbin 150030, China; HeilongjiangBeidahuang Green Health Food Co. LTD, Heilongjiang, Jiamusi 154000, China.
³ College of Food Science and Engineering, Jilin Agricultural University, Changchun 130118, China; Division of Soybean Processing, Soybean Research & Development Center, Chinese Agricultural Research System, Changchun 130118, China.
⁴ College of Food Science and Engineering, Jilin Agricultural University, Changchun 130118, China.
⁵ College of Food Science, Northeast Agricultural University, Harbin 150030, China.
⁶ College of Food Science and Engineering, Jilin Agricultural University, Changchun 130118, China; Division of Soybean Processing, Soybean Research & Development Center, Chinese Agricultural Research System, Changchun 130118, China. Electronic address: yuhansong@jlau.edu.cn.
⁷ College of Food Science, Northeast Agricultural University, Harbin 150030, China. Electronic address: jlzname@neau.edu.cn.

PMID: 34175627
DOI: 10.1016/j.foodchem.2021.130402

Abstract

High-purity insoluble dietary fibre (HPIDF) was obtained from low-purity dietary fibre (LPDF) of Okara using a combined-enzyme method. For exploring the value of HPIDF as a functional food material, the structure, physicochemical properties, adsorption properties, potential bioactivities of HPIDF and their changes in different stages of digestion were explored in vitro. The results show that HPIDF shows a high perfect oil-holding capacity, higher viscosity, better cation exchange capacity, α-amylase activity ratio due to smaller particle size and larger specific surface area. The heavy metals-adsorption (Cd²⁺, Pb²⁺, Zn²⁺) shows the same, especially in simulated gastric fluid, which is similar to the adsorbability of glucose, cholesterol and acrylamide. Beyond the structure, the dissociation degree of some functional groups result from different digestive environments is the possible cause. Okara is an ideal material for the recovery of HPIDF, which has the potential to be processed into functional food materials.

Keywords: Enzyme engineering; Food resource recovery; Natural compounds; Soybean by-products.

MeSH terms

Acrylamide
Dietary Fiber*
Glycine max*
Particle Size
Viscosity

Substances

Dietary Fiber
Acrylamide