Kinetics of Thermal‐Degradation of Betanins: A Teaching Mini‐Project for Undergraduates Employing the Red Beet

Abstract

A 4-week mini-project is proposed for an experimental Physical Chemistry course applied in Food Science training. Activities include preparation of beet extract for the extraction of betanins and analysis of the kinetics of betanins in thermal degradation at three temperatures (60, 70, and 80 ºC). In addition to developing common laboratory routines (for example, dilution and use of the UV-Vis spectrophotometer), students will have contact with the usual procedure for evaluating use of natural dyes in the food industry.

Sewage Sludge in Phenol and Methylene Blue Adsorption: A Miniproject for Teaching Sustainability

“…Table 1 shows that the learning outcomes presented in the course of the activity are compatible with miniprojects for teaching with a similar execution time. [6][7][8][9][10]23 In the first week, the presentation and leveling of the students in the basic concepts that will be worked on was performed. For this, a single meeting lasting 4 h is usually sufficient.…”

“…Engineering courses, due to their design, are excellent for promoting students’ reflection on the optimization of sustainable attitudes . Our research group has been producing and testing chemical miniprojects for applied teaching in engineering courses, − and we observe that this type of pedagogical proposal reflects positively on the teaching–learning process of the students. The use of sludge from a domestic effluent treatment plant (DETP) presents possibilities for our proposal to develop miniprojects for teaching sustainability.…”

Aportes latinoamericanos al proceso de aprendizaje dentro del laboratorio de pregrado

“…Del análisis de los documentos se identifica una gran variedad intencionalidades pedagógicas que articulan las propuestas de investigación, estas fueron agrupadas en las 23 categorías que se presentan en la Figura 4. Las categorías que más destacan son low-cost, nombrada en 16 artículos (20 %) en la cual se consideró a todos los documentos que mencionan el uso de material casero o que busquen facilitar el acceso a materiales e instrumentos, como por ejemplos el uso de remolacha roja para el estudio de cinética de degradación (Rosa et al, 2018) o el uso de una cámara regular para efectuar análisis colorimétricos (Angelani et al, 2018). Por otra parte, el aprendizaje contextualizado fue nombrado en 13 artículos (16 %) y se consideró en esta categoría a todas las implementaciones que declaran utilizar elementos de la vida cotidiana de sus estudiantes para ejemplificar o sustentar la importancia del laboratorio, diferenciados de metodologías basadas en problemas debido a la ausencia de una problemática a resolver.…”

Avaliação do processo de liofilização na estabilidade dos pigmentos produzidos por Monascus purpureus CCT 3802

“…O valor de redução decimal e o valor Z, foi determinado, de acordo com a Equação 8 e 9 (Mercali et al, 2013;Peron, Fraga & Antelo, 2017). Os parâmetros termodinâmicos dos extratos bruto e liofilizado reconstituído se basearam na entalpia (ΔH), energia livre de Gibbs (ΔG) e a entropia (ΔS), de acordo com as Equações 10, 11 e 12 (Rosa, Antelo & Rosa, 2018).…”