Improved Mexican Varieties of Bread Wheat: Characterization and evaluation of Physical and Viscoelastic Properties

Dulce María Hernández Colín; Anayansi Escalante-Aburto; Nestor Ponce García

doi:10.18633/biotecnia.v27.2406

Authors

DM Hernández Colín Facultad de Ciencias Agrícolas, Universidad Autónoma del Estado de México (UAEMéx), Toluca 50200, México.
A Escalante-Aburto Tecnologico de Monterrey, The Institute for Obesity Research
N Ponce García Facultad de Ciencias Agrícolas, Universidad Autónoma del Estado de México (UAEMéx), Toluca 50200, México. https://orcid.org/0000-0001-9342-0095

DOI:

https://doi.org/10.18633/biotecnia.v27.2406

Keywords:

moisture content; uniaxial compression; small-strain; grain, Triticum aestivum

Abstract

The moisture content influences the physical-mechanical and viscoelastic properties of wheat grains. A higher moisture content markedly reduced the hardness and elasticity of grains while increasing axial dimensions and plastic work. This research aimed to analyze the physical-mechanical and viscoelastic properties of wheat grains from four improved Mexican varieties. To achieve this, the small-strain uniaxial compression method was employed, considering 12%, 16%, and 20% moisture content levels. Additionally, the study sought to identify potential correlations between these properties. For the viscoelastic properties, statistically significant differences were observed among the varieties in terms of total (W_t), elastic (W_e), and plastic work (W_p), as well as the degree of elasticity (DE). These parameters showed a gradual decrease with increasing moisture content. The study also revealed significant correlations between specific biophysical and viscoelastic properties. Notably, negative correlations (P<0.05) were found between DE and thickness and length dimensions. Furthermore, the bulk density exhibited highly significant negative correlations (P<0.01) with W_p and highly significant positive correlations (P<0.01) with DE. Regarding viscoelastic properties, the Z1 and X5 varieties exhibited superior performance, showing favorable outcomes in W_t and W_e and their physical-mechanical characteristics.

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