Physicochemical properties and in vitro digestibility of highland barley starch with different extraction methods. (1st March 2023)

• Record Type: Journal Article
• Authors: Nie, Mengzi; Piao, Chunhong; Wang, Aixia; Xi, Huihan; Chen, Zhiying; He, Yue; Wang, Lili; Liu, Liya; Huang, Yatao; Wang, Fengzhong; Tong, Li-Tao
• Is Part Of: Carbohydrate polymers. Volume 303(2023)
• Publication Date: 2023-03-01
• Subjects: Highland barley starch -- Extraction method -- Double enzyme extraction -- Multiscale structure of starch -- Starch digestion; Polysaccharides -- Periodicals; Polysaccharides -- Periodicals; Polysaccharides -- Périodiques; Electronic journals; 547.78
• DOI: 10.1016/j.carbpol.2022.120458
• Languages: English
• ISSNs: 0144-8617

Abstract

Abstract: The objective of this study was to compare the structural, thermal, rheological and digestive properties of highland barley starch (HBS) by different extraction methods. Five techniques were used to extract HBS: Alkali extraction, Ultrasound extraction, double enzyme extraction (DE), three enzyme extraction (TE) and ultrasonic assisted TE (U-TE). The results indicated that the Ultrasound extracted HBS had fewer Maltese crosses, lower molecular weight (Mw), and higher content of damaged starch ( P < 0.05). Meanwhile, DE extracted HBS had higher Mw, and the content of short amylopectin than that of Alkali extracted HBS ( P < 0.05). Additionally, the DE extracted HBS showed the highest relative crystallinity and good short-range ordered structure, which led to the outcome of stronger thermal stability and higher values of G′ and G′′ ( P < 0.05). These results indicated that enzymatic extraction could better protect the resistance of HBS by protecting its physicochemical properties. Graphical abstract: Unlabelled Image Highlights: Double enzyme extraction (DE) had advantages in retaining the antidigestibility of HBS. DE had the highest relative crystallinity (26.05%) and the content of RS (14.23%). Alkali had lowest thermal stability and rheological properties. The digestibility of DE (86.65%) was significantly lower than Alkali (93.18%).