RT info:eu-repo/semantics/article
T1 Molecular modifications in cereal and tuber starches induced by microwave treatment: A comprehensive analysis using asymmetric flow field-flow fractionation
A1 Mauro, Raúl Ricardo
A1 Vicente Fernández, Ainhoa
A1 Ronda Balbás, María Felicidad
K1 Asymmetric flow field-flow fractionation
K1 Multi-angle light scattering detection
K1 Physical modification
K1 Molecular structure
K1 Heat-moisture treatment
K1 Modified starch
K1 2210 Química Física
AB This study investigated the impact of microwave treatment (MWT) on the molecular structure of starches fromcereal (normal and waxy rice, normal and waxy maize, and wheat) and tuber (potato and tapioca) sources usingasymmetric flow field-flow fractionation (AF4) coupled with multi-angle light scattering and differentialrefractive 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 profilesrelated 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, whereaswaxy cereals experienced homogenisation of molecular radii and apparent density. In contrast, tuber starches,particularly potato, underwent molecular aggregation, forming homogeneous structures with low dispersity anda high concentration of large particles. This study introduces a novel approach for evaluating and understandingthe molecular structural modifications in starch induced by MWT and how the original matrix affects thesemodifications, providing valuable insights for future research and applications of this physical modificationprocess
PB Elsevier
SN 0141-8130
YR 2025
FD 2025
LK https://uvadoc.uva.es/handle/10324/76943
UL https://uvadoc.uva.es/handle/10324/76943
LA eng
NO International Journal of Biological Macromolecules, 2025, vol. 316, p. 144395
NO Producción Científica
DS UVaDOC
RD 02-ago-2025