CENTRO UTN QUITEX (Grupo de Investigación Química Teórica Experimental)
http://hdl.handle.net/20.500.12272/3837
2024-03-28T08:58:52ZImpact of moisture and grinding on yield, physical, chemical and thermal properties of wholegrain flour obtained from hydrothermally treated sorghum grains
http://hdl.handle.net/20.500.12272/10049
Impact of moisture and grinding on yield, physical, chemical and thermal properties of wholegrain flour obtained from hydrothermally treated sorghum grains
The present work evaluates the potential of sorghum with high content of tannins for wholegrain flour production. Two types of mills were used: a roller mill (RM) and a blade (BM) mill. The impact of moisture and grinding on yield, physical, chemical and thermal properties were evaluated. Maximum yield was obtained using a BM with 25% moisture in the grain, resulting in 60.9% versus 28% (g flour g -1 wholegrain sorghum) for the RM. Grain moisture and milling type affected flour colour and ashes. For both mills, the pasting and thermal properties of flour with grain moisture variation were significantly different from the untreated control sample. By studying the procedures for flour production and quality characteristics, it is possible to produce flour with good physical attributes, which can contribute to the development of gluten-free foods based on sorghum for the coeliac population.
2020-02-03T00:00:00ZInfluencia del solvente en el autoensamblado de la amelina. Estudio estático y dinámico
http://hdl.handle.net/20.500.12272/10044
Influencia del solvente en el autoensamblado de la amelina. Estudio estático y dinámico
La amelina es el primer derivado de la hidrólisis de la melamina (M) o 2,4,6-triamino-1,3,5-triazina. Debido a la presencia de múltiples sitios dadores (D) y aceptores (A) de puentes de hidrógeno (PH), la AM es capaz de formar hexámeros cíclicos con una elevada cooperatividad. Estas estructuras, relevantes en la química supramolecular, no han sido estudiadas en detalle. Es por ello que en este trabajo se estudia la capacidad auto-ensamblante de la AM en fase gaseosa, en medio acuoso y en cloroformo. Mediante cálculos DFT-D se analizaron las estabilidades de todos los dímeros posibles que puede formar la AM mediante sus diferentes combinaciones. A fin de estudiar la influencia del solvente se simularon por dinámica molecular (DM) mezclas al 50% en peso de AM:H2O y AM:CHCl3 para aquellos dímeros más favorecidos energéticamente.
2023-04-11T00:00:00ZAugmentation of inductive effects through short range intramolecular hydrogen bonds for the improvement of cooperativity of trimeric rosettes
http://hdl.handle.net/20.500.12272/9824
Augmentation of inductive effects through short range intramolecular hydrogen bonds for the improvement of cooperativity of trimeric rosettes
Three key design elements improve the binding strength of trimeric rosettes: the direction of hydrogen bonds, the addition of groups with inductive effects, and the presence of ambifunctional intramolecular hydrogen bonds between the substituents.
2024-02-26T00:00:00ZAcidity of isomorphic substituted zeolites with B, Al and Ga revisited
http://hdl.handle.net/20.500.12272/9768
Acidity of isomorphic substituted zeolites with B, Al and Ga revisited
En este trabajo se analiza cómo afecta a a la acidez la sustitución de átomos de Silicio por átomos de Boro, Aluminio y Galio en tres tipos de zeolitas microporosas: BEA, FAU y MOR.
2024-02-13T00:00:00Z