Encapsulation of L-Ascorbic Acid Within the Natural Biopolymer-Galactomannan-Using the Spray-Drying Method: Preparation, Characterization, and Evaluation of Antioxidant Activity

Xyloglucan from Hymenaea courbaril var. courbaril seeds as encapsulating agent of l-ascorbic acid

“…The encapsulation efficiency (EE) was found to be 96.34 ± 1.6%, indicating that the xyloglucan and the conditions used in SD process did not cause significant damage to the active compound. The EE value found here is similar to the other polysaccharides used for the encapsulation of ascorbic acid, such as galactomannan that varied from 95.40 to 97.92% in different environmental conditions [20] and arabic gum that presented 100.80% [9].…”

“…Briefly, a volume of 10 mL of 0.05% (w/v) microparticle solution in 1% (w/v) oxalic acid was added in Erlenmeyer flask containing 50 mL of 1% (w/v) oxalic acid and titrated with 0.2% (w/v) DCIP solution until persistent pink color for 15 s. The amount of ascorbic acid was calculated according to the following equation [19]: AA (%) = (V x F)/A x100, where V = Volume spent in the titration; F = volume of DCIP in mL spent on standardization; A = mass (g) of the sample used in the titration. The encapsulation efficiency (EE) was calculated according to the equation [20]: EE(%) = (QD/QA) x 100, where QD is the total amount of ascorbic acid determined in the system and QA the amount of ascorbic acid added to the system. The encapsulation experiments were carried out in quintuplicate and for each one of the five samples, ascorbic acid was determined in triplicate.…”

“…The evaluation of the stability of the XAA microparticles, was carried out at time intervals of 0, 7, 15, 30 and 60 days, through ascorbic acid analysis mentioned in the section 2.7, taking the result of the total ascorbic acid at time 0 as the value of 100%. It was also measured the antioxidant activity using the 2.2diphenyl-1-picrylhydrazyl (DPPH) radical method [20], in which the methanolic solution of the XAA sample, with the concentration of 10 mg mL −1 , was initially subjected to ultrasonic bath (UNIQUE-Ultrasonic Cleaner) for solubilization and release of AA from the nucleus. From this solution different concentrations (from 0.1 to 7.5 mg mL −1 ) were obtained with dilution with methanol.…”

Bioadsorção Do Cromo Hexavalente Através Da Biomassa Da Semente De Flamboyant

“…No estudo de propriedades físico-químicas da goma carboximetilada do Flamboyant apresentado por Pacheco-aguirre et al ( 2010), e no estudo de encapsulação do ácido L-ascórbico no biopolímero natural galactomanana apresentado por Souza et al (2015), são identificados os grupos funcionais presentes no material biossorvente. De acordo com eles, o espectro na região do infravermelho da semente de Flamboyant apresenta um grande número de bandas, correspondentes a um polissacarídeo pertencente ao grupo das galactomananas, o qual possui como cadeia principal β-D-manopiranose bem como cadeias laterais de α-D-galactopiranose.…”

“…De acordo com eles, o espectro na região do infravermelho da semente de Flamboyant apresenta um grande número de bandas, correspondentes a um polissacarídeo pertencente ao grupo das galactomananas, o qual possui como cadeia principal β-D-manopiranose bem como cadeias laterais de α-D-galactopiranose. Utilizando o método de identificação de difração de raios X, apresentado por Souza et al (2015), identifica-se um pico alto próximo a 2θ pouco definido, indicando que a semente de Flamboyant não possui uma organização em sua estrutura.…”