RESUMEN
The feasibility of obtaining resistant starch type III (RS3) from malanga flour (Xanthosoma sagittifolium), as an unconventional source of starch, was evaluated using the hydrothermal treatment of autoclaving. The physicochemical characterization of RS3 made from malanga flour was carried out through the evaluation of the chemical composition, color attributes, and thermal properties. In addition, the contents of the total starch, available starch, resistant starch, and retrograded resistant starch were determined by in vitro enzymatic tests. A commercial corn starch sample was used to produce RS3 and utilized to compare all of the analyses. The results showed that native malanga flour behaved differently in most of the evaluations performed, compared to the commercial corn starch. These results could be explained by the presence of minor components that could interfere with the physicochemical and functional properties of the flour; however, the RS3 samples obtained from malanga flour and corn starch were similar in their thermal and morphological features, which may be related to their similarities in the content and molecular weight of amylose, in both of the samples. Furthermore, the yields for obtaining the autoclaved powders from corn starch and malanga flour were similar (≈89%), which showed that the malanga flour is an attractive raw material for obtaining RS3 with adequate yields, to be considered in the subsequent research.
Asunto(s)
Harina , Almidón Resistente , Xanthosoma/química , Zea mays/químicaRESUMEN
High molecular weight chitosan (≈322 kDa) was obtained from chitin isolated from Brachystola magna (Girard) to produced biodegradable films. Their physicochemical, mechanical and water vapor permeability (WVP) properties were compared against commercial chitosan films with different molecular weights. Brachystola magna chitosan films (CFBM) exhibited similar physicochemical and mechanical characteristics to those of commercial chitosans. The CFBM films presented lower WVP values (10.01 × 10-11 g/m s Pa) than commercial chitosans films (from 16.06 × 10-11 to 64.30 × 10-11 g/m s Pa). Frankfurt-type sausages were covered with chitosan films and stored in refrigerated conditions (4 °C). Their quality attributes (color, weight loss, pH, moisture, texture and lipid oxidation) were evaluated at 0, 5, 10, 15 and 20 days. Sausages covered with CFMB films presented the lowest weight loss (from 1.24% to 2.38%). A higher increase in hardness (from 22.32 N to 30.63 N) was observed in sausages covered with CFMB films. Compared with other films and the control (uncovered sausages), CFMB films delay pH reduction. Moreover, this film presents the lower lipid oxidation level (0.10 malonaldehyde mg/sample kg). Thus, chitosan of B. magna could be a good alternative as packaging material for meat products with high-fat content.
Asunto(s)
Quitosano/química , Embalaje de Alimentos , Conservación de Alimentos , Saltamontes/química , Productos de la Carne , Membranas Artificiales , AnimalesRESUMEN
En el presente articulo se analizan diez casos de intoxicacion que fueron atendidos en el Servicio de Urgencias del Hospital Universitario Ramon Gonzalez Valencia durante el periodo de 1978 a 1987. Se estudio la distribucion segun sexo, edad, porocedencia, tiempo de consulta luego de la picadura, expresion clinica, grado de intoxicacion, terpaia empleada y permanencia hopsitalaria. Al final se discuten los signos y sintomas de la experiencia y la revision de la literatura
Asunto(s)
Preescolar , Niño , Adolescente , Adulto , Humanos , Masculino , Femenino , Escorpiones/patogenicidad , Picaduras de Arañas , Colombia , Neurotoxinas/toxicidad , Picaduras de Arañas/epidemiología , Picaduras de Arañas/terapiaRESUMEN
Para el tratamiento de las Intoxicaciones Agudas Severas que presentan un alto riesgo de complicaciones, se utiliza en el Servicio de Toxicología de la UIS el Recambio Sanguíneo Periódico, en los casos de Tóxicos sin antídoto, Ingestión de una o más veces la dosis letal del tóxico, Poli-intoxicaciones y en Tóxicos Metahemoglobinizantes, obteniendo en la mayoría de los casos Recuperación Completa del paciente. El procedimiento del Recambio se realiza en dos fases; primero se extrae una unidad de sangre en adultos o el 10% de la volemia en niños, posteriormente se restituye la volemia mediante la administración de una unidad de sangre en adultos y el 10% de la volemia en niños, teniendo la precaución de que la sangre no tenga más de 24 horas de extraída del donante. Además es importante tener en cuenta que como en las transfusiones deben seguirse las mismas normas y considerarse clínicamente los mismos riesgos