ABSTRACT
ABSTRACT This paper describes the preparation and characterization of alginate beads coated with gelatin and containing Lactobacillus rhamnosus. Capsules were obtained by extrusion method using CaCl2 as cross linker. An experimental design was performed using alginate and gelatin concentrations as the variables investigated, while the response variable was the concentration of viable cells. Beads were characterized in terms of size, morphology, scanning electron microscopy (SEM), moisture content, Fourier Transform Infrared Spectrometry (FTIR), thermal behavior and cell viability during storage. The results showed that the highest concentration of viable cells (4.2 x 109 CFU/g) was obtained for 1 % w/v of alginate and 0.1 % w/v of gelatin. Capsules were predominantly spherical with a rough surface, a narrow size distribution ranging from 1.53 to 1.90 mm and a moisture content of 97.70 ± 0.03 %. Furthermore, FTIR and thermogravimetric analysis indicated an interaction between alginate-gelatin. Cell concentration of alginate/gelatin microcapsules was 105 CFU/g after 4 months of storage at 8 oC.
Subject(s)
Capsules/standards , Probiotics , Drug Stability , Alginates/ultrastructure , Lacticaseibacillus rhamnosus/ultrastructure , Gelatin/ultrastructure , Microscopy, Electron, Scanning , Cell Survival , Spectroscopy, Fourier Transform Infrared , Drug StorageABSTRACT
Se realizó la determinación de los límites de detección y cuantificación de los principios activos lidocaína y epinefrina, con el objetivo de validar el proceso de limpieza posterior a la fabricación de los carpules. En ambos métodos se empleó la cromatografía líquida de alta eficiencia, con columnas de fase reversa y detección ultravioleta. Estas técnicas se utilizaron para el monitoreo analítico de las aguas de lavado generadas en la limpieza de los reactores de fabricación. Se recomienda realizar al menos 3 enjuagues donde las trazas de los principios activos resultarán no detectables