Ciencias Exactas y Ciencias de la Salud

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Incorporation of microencapsulated iron in dried chili mangoes (Mangifera indica L. var. Ataulfo) with ultrasound pre-treatment
(Instituto Tecnológico y de Estudios Superiores de Monterrey, 2022-11-23) Rodríguez Rodríguez, Maribel; Morales de la Peña, Mariana; puemcuervo, emimayorquin; Tejada Ortigoza, Viridiana Alejandra; Maldonado Guevara, Blanca Isabel; School of Engineering and Sciences; Campus Querétaro; Arredondo Ochoa, Teresita
The study of the incorporation of microencapsulated iron in dried chili mangoes with ultrasound (US) pre-treatment is presented in this dissertation. This research involves the establishment of iron microencapsulation process through spray drying, as well as the evaluation of US treatment impact in i) iron microcapsules incorporation into food matrix and ii) in mango drying process. Also, proximal, physicochemical and sensorial analysis of the final product were conducted. Chapter 1 includes the motivation, problem statement, and context of this study. Chapter 2 contains the hypothesis, objectives and research plan followed during this project. Chapter 3 covers the theoretical framework regarding iron absorption and deficiency, development of new products, US treatment and microencapsulation principles. Chapter 4 details the materials and methods to conduct the experimental work. Chapter 5 includes the discussion of obtained results. Chapter 6 presents conclusions and recommendations. Finally, a disclosure regarding scientific material and an appendix section containing complementary information collected during data organization and analysis are included. This dissertation demonstrated that the incorporation of iron microcapsules in mango applying US treatment is a potential alternative to obtain dried chili mangoes with high content of protein (41.56 ± 3.71 g/100 g) and iron (9.57 ± 0.08 mg/100 g), with sensorial acceptability that could be consumed as “healthy snacks” for children with iron deficiency.
Microencapsulation of gallic acid in biopolymeric pectin-alginate matrices for its application in biodegradable batteries
(Instituto Tecnológico y de Estudios Superiores de Monterrey, 2022-11-21) Nájera Martínez, Erik Francisco; Parra Saldivar, Roberto Parra; emimmayorquin; Sosa Hernández, Juan Eduardo; Escuela de Ingeniería y Ciencias; Campus Monterrey; Melchor Martínez, Elda Madai
Gallic acid is an important phenolic compound with remarkable activities such as antimicrobial, antiviral and antioxidant. Nevertheless, there is a not so common application that is being explored by this work; its electrochemical properties. Gallic acid is able to conduct electricity in order to function inside a biobattery, however the intrinsic properties of the molecule make it susceptible to degradation in alkaline pHs, aqueous environments and light exposure. There is a wide variety of techniques used to increase the stability and the shelf life of a molecule like gallic acid. One of this techniques is the microencapsulation by the Spray Drying method. For this technique two biopolymers were proposed, alginate and pectin as they are able to form a pH responsive microcapsule needed for the function of the gallic acid molecule inside a battery. The microcapsules produced had a retention and encapsulation efficiency in the ranges of 45-82% and 79-90% respectively. The scanning electron microscopy showed smooth spherical shape capsules with some flat zones in the middle part of the capsule, however they did not present fractures or damage signals. The dynamic light scattering registered average particle sizes from 1327 to 1591 in d.nm. The Fourier-Transform infrared spectroscopy showed signals corresponding to the common peaks of each one of the wall materials. The cyclic voltammetry reported that the microcapsules are stable and have a good electrical performance at a pH value of 7, however they do not function properly in a pH value of 14. The results obtained suggest that the microcapsules have the ability to conduct currents and that gallic acid is fulfilling its role, but not it alkaline pHs as the particles have short dissolution times and gallic acid is susceptible to alkaline pH values

Ciencias Exactas y Ciencias de la Salud

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