Understanding Urea Encapsulation in Different Clay Minerals as a Possible System for Ruminant Nutrition
Metadatos
Mostrar el registro completo del ítemEditorial
MDPI
Materia
Clay minerals Urea Encapsulation
Fecha
2019-09-29Referencia bibliográfica
Silva, F. C., Lima, L. C., Viseras, C., Osajima, J. A., da Silva Júnior, J. M., Oliveira, R. L., ... & Silva-Filho, E. C. (2019). Understanding Urea Encapsulation in Different Clay Minerals as a Possible System for Ruminant Nutrition. Molecules, 24(19), 3525.
Resumen
Considering the challenges of urea administration due to the high ureolytic activity of
the rumen and the importance of its use, as well as taking into account the relevance of sustainably
exploiting the technological potential of biodiversity, this research studies the encapsulation of urea
in different clay minerals (palygorskite (Pal), sepiolite (Sep), and Veegum® (V)) as an alternative for
use as nonprotein nitrogen (NNP) sources. A method of incorporation was developed in which the
encapsulation of urea was proven by X-ray diffraction; fibrous materials, Pal and Sep had similar
characteristics due to the decrease in the relative plane intensity (011), suggesting a decrease in the
order of their stacking due to the presence of urea on the surface or inside channels. By contrast,
V showed a 7.74º reflection shift, suggesting an increase in basal spacing from 11.45 Å in V to 14.88 Å
in the sample after urea encapsulation. By thermogravimetry, it was observed that the presence of urea
did not change the mass-loss profiles but only increased the percentage of loss in respective events,
indicating urea incorporation in the clay minerals. These results provide a promising alternative for
administering NNP sources in the ruminant diet.