2026-04-27T21:21:49Zhttps://uvadoc.uva.es/oai/request

oai:uvadoc.uva.es:10324/769432025-12-03T07:49:43Zcom_10324_31661com_10324_952com_10324_894col_10324_31662

Molecular modifications in cereal and tuber starches induced by microwave treatment: A comprehensive analysis using asymmetric flow field-flow fractionation Mauro, Raúl Ricardo Vicente Fernández, Ainhoa Ronda Balbás, María Felicidad Producción Científica This study investigated the impact of microwave treatment (MWT) on the molecular structure of starches from cereal (normal and waxy rice, normal and waxy maize, and wheat) and tuber (potato and tapioca) sources using asymmetric flow field-flow fractionation (AF4) coupled with multi-angle light scattering and differential refractive index detectors. The starches were treated under the same conditions (7.5 W/g, 25 % moisture, 100 ◦C, 30 min). In addition to conventional parameters such as number- and weight-average molecular masses, radii, and dispersity, novel metrics, including mass-to-radius ratios, apparent density, and concentration profiles related to molecular mass, were employed to elucidate structural transformations. The results revealed that non- waxy cereal starches exhibited greater resistance to hydrolysis owing to higher structural compaction, whereas waxy cereals experienced homogenisation of molecular radii and apparent density. In contrast, tuber starches, particularly potato, underwent molecular aggregation, forming homogeneous structures with low dispersity and a high concentration of large particles. This study introduces a novel approach for evaluating and understanding the molecular structural modifications in starch induced by MWT and how the original matrix affects these modifications, providing valuable insights for future research and applications of this physical modification process 2025-07-29T10:11:40Z 2025-07-29T10:11:40Z 2025 info:eu-repo/semantics/article International Journal of Biological Macromolecules, 2025, vol. 316, p. 144395 0141-8130 https://uvadoc.uva.es/handle/10324/76943 10.1016/j.ijbiomac.2025.144395 144395 International Journal of Biological Macromolecules 316 eng https://www.sciencedirect.com/science/article/pii/S0141813025049475 info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by-nc-nd/4.0/ © 2025 The Author(s) Attribution-NonCommercial-NoDerivatives 4.0 Internacional Elsevier SI