Yield and Physicochemical Properties of Soluble Dietary Fiber Extracted from Untreated and Steam Explosion-Treated Black Soybean Hull

Abstract

Black soybean hull was subjected to steam explosion (SE) treatment under different conditions to improve the yield and properties of soluble dietary fiber (SDF) extract. Optimal conditions for SE treatment were found to be moisture content of 15%, pressure level of 1.0 MPa, and treatment time of 80 s. Under these conditions, the yield of SDF increased from 10.20% to 17.49%. In addition, structural and functional properties of SDF from untreated and SE-treated black soybean hull were investigated. Soluble dietary fiber extracted from SE-treated hull exhibited lower molecular weight and improved functional properties, such as cholesterol-binding capacity, when compared to SDF extracted from untreated soybean hull. In addition, SDF extracted from SE-treated black soybean hull showed a rough surface structure, while a smooth surface structure was found for SDF extracted from the untreated hull. The obtained results indicate that SE treatment can be successfully used to enhance the yield and the property of yolk cholesterol absorption of SDF adsorption of yolk cholesterol functional properties of SDF from black soybean hull.

Structure, Physicochemical Property, and Functional Activity of Dietary Fiber Obtained from Pear Fruit Pomace (Pyrus ussuriensis Maxim) via Different Extraction Methods

“…Under acidic conditions, a large number of hydrogen ions were found in the system repulsion with a partial positive charge of dietary fiber molecules and cholesterol, resulting in a decrease in binding force. With increasing pH, the carboxyl groups in dietary fiber molecules were dissociated and converted into carboxyl anions (RCOO − ), which have a strong binding ability with cholesterol molecules, thereby improving the adsorption capacity of dietary fiber for cholesterol [ 43 ].…”

Recovery of total, soluble, and insoluble dietary fiber from potato ( Solanum tuberosum ) residues and comparative evaluation of their structural, physicochemical, and functional properties

“…WSC of TDF (4.35-8.04 ml/g) and IDF (5.22-7.10 ml/g) from potato residues were higher than that of peas F I G U R E 4 Water retention capacity, water swelling capacity, and water solubility of total, insoluble, and soluble dietary fiber obtained from potato residues under different pH (5.26 ml/g) and chickpeas (4.28 ml/g), but similar to the edible seaweeds, for example, kelp, wakame, and nori (5.70-10.50 ml/g) and deoiled cumin (7.98 ml/g) (Ma & Mu, 2016). Higher WRC and WSC in TDF and IDF was probably because the hydrophilic groups were found in cellulose and hemicellulose molecules, which also became gel after water absorption (Shen et al, 2019). Moreover, pH and temperature had positive effects on hydration properties of dietary fiber samples, on the other hand, NaCl concentration showed negative effect.…”

The applications of conventional and innovative mechanical technologies to tailor structural and functional features of dietary fibers from plant wastes: A review

“…Likewise, the longer SE residence time and higher moisture content of black soybean hulls during SE treatment revealed a greater SDF until reaching a certain threshold, with no further increase above that (Shen et al. 2019). Conversely, some papers claimed that SE treatment could enhance insoluble cellulosic content.…”

“…The authors hypothesized that excessive degradation of polysaccharides produced small molecular weight particles that could not be precipitated by ethanol during the DF measurement. Likewise, the longer SE residence time and higher moisture content of black soybean hulls during SE treatment revealed a greater SDF until reaching a certain threshold, with no further increase above that (Shen et al 2019). Conversely, some papers claimed that SE treatment could enhance insoluble cellulosic content.…”

“…Moreover, SE treatment modified the cholesterol-lowering effects. For instance, Shen et al (2019) reported an increase in CAC of SE-treated soybean hulls, with greater values obtained at pH 7 than at pH 2. Higher pH promoted the dissociation of carboxyl groups on modified fiber into carboxyl anions, showing a strong interaction with cholesterol.…”