ArticleFrontiers in nutrition2026
Structural characterization and Pickering emulsifying ability of Tartary buckwheat starch prepared by natural deep eutectic solvent method.
Article in Frontiers in nutrition, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
In this study, a betaine-ethylene glycol natural deep eutectic solvent (NADES) system was evaluated as a model extraction medium for preparing Tartary buckwheat starch (TBS). The extraction performance, granule morphology, selected physicochemical properties, and Pickering emulsion-forming behavior of NADES-extracted TBS (NADES-TBS) were compared with those of alkali-extracted TBS (AE-TBS). The highest starch content was obtained at a betaine/ethylene glycol molar ratio of 1:4, water content of 15%, and extraction time of 4 h. Under these conditions, the starch content of NADES-TBS was 87.34 ± 0.81%, which was not significantly different from that of AE-TBS (87.84 ± 0.66%), whereas the apparent amylose content was lower (22.95 ± 0.08% vs. 24.14 ± 0.38%). NADES-TBS showed a slightly larger mean particle size (9.194 μm) than AE-TBS (8.329 μm), while both samples retained the A-type crystalline pattern. The relative crystallinity changed only slightly from 30.39 to 31.11%. Compared with AE-TBS, NADES-TBS showed a higher pasting temperature, lower peak viscosity, and lower setback viscosity. In an MCT-water model system, NADES-TBS showed lower oil-water interfacial tension and a contact angle closer to 90° than AE-TBS. Pickering emulsions stabilized by NADES-TBS showed smaller droplet sizes than those stabilized by AE-TBS under the tested short-term conditions. These results indicate that the selected NADES extraction process was associated with changes in granule morphology and selected physicochemical/interfacial properties of TBS. However, because residual ethylene glycol, molecular-level structure, and long-term emulsion stability were not fully evaluated, food-related application and mechanistic conclusions require further verification.
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