Ciencia e Ingeniería en Alimentos y Biotecnología

URI permanente para esta comunidadhttp://repositorio.uta.edu.ec/handle/123456789/412

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2018 - 201922020 - 20252

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Tema: search.filters.subject.COMPONENTES BIOACTIVOS

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Mostrando 1 - 4 de 4
  • Miniatura
    Item type:Ítem,
    Evaluación in vitro de la capacidad antioxidante de los componentes bioactivos microencapsulados provenientes del hongo Hericium erinaceus
    (Universidad Técnica de Ambato. Facultad de Ciencia e Ingeniería en Alimentos y Biotecnología. Carrera de Biotecnología, 2025-02)
    Cajiao Valdivieso, Jannis Naomi
    ;
    López Hernández, Orestes Darío
    The mushroom Hericium erinaceus is a macromycete renowned for its bioactive properties, including antioxidant, immunomodulatory, and neuroprotective capacities, positioning it as a promising resource for improving human health. This study evaluated the optimal extraction conditions of its bioactive components and analyzed the antioxidant properties and microencapsulation efficiency of the extracted compounds. Using dried and ground samples of H. erinaceus, four extraction treatments were conducted, with treatment T2 (boiling water for 2 hours at a 1:20 ratio) yielding the best results. Spectrophotometric methods determined the concentrations of polyphenols (7.04 milligrams of gallic acid per gram of dry basis) and polysaccharides (20.76 milligrams of glucose per gram of dry basis), while antioxidant activity was assessed using the DPPH method, achieving a 70.77 percent inhibition and an antioxidant capacity of 3.23 micromoles of Trolox per gram of dry basis. Additionally, the microencapsulation of bioactive compounds was validated using FTIR spectroscopy, confirming the interaction between the active compounds and the polymeric matrix. The results demonstrate that H. erinaceus extracts rich in polyphenols and polysaccharides exhibit significant antioxidant activity, highlighting their potential as functional foods. This study expands the understanding of the mushroom's bioactive properties, confirming its viability as an alternative to enhance human health in Ecuador, particularly in addressing challenges related to malnutrition and oxidative stress.
  • Miniatura
    Item type:Ítem,
    Estudio de los beneficios del consumo de licopeno como suplemento alimenticio
    (Universidad Técnica de Ambato. Facultad de Ciencia e Ingeniería en Alimentos y Biotecnología. Carrera de Alimentos, 2022-09)
    López Acosta, Doménica Aydee
    ;
    Cerda Mejía, Liliana Alexandra
    A diet rich in foods containing carotenoids is associated with health benefits. Interest in lycopene is growing rapidly because it is a natural pigment characterized by high antioxidant potential and unique physicochemical structures that contribute to specific biological properties related to the red color present in tomatoes and tomato products. In plant sources where lycopene is found, the isomer is predominantly all-trans; however, the most bioavailable form is cis - lycopene. In the results of the review, the mechanisms of action of lycopene, bioactivity, digestive absorption, metabolism, transport and stability are highlighted. The comprehensive study of food seen as a food matrix, involves not only the nutritional aspect, but also all those elements that can be part of the diet. Due to the above, various publications show an association between the consumption of lycopene in the diet and the preventive role of certain types of diseases, where the reduction of the risk of cardiovascular diseases, cancer and other ailments is related. However, as a food supplement, lycopene is packaged in dark bottles to achieve protection against light exposure, because it can undergo degradation processes and loss of bioactivity; opting for a lycopene supplement will provide the right amount of this antioxidant, there is no consensus on the recommended daily dose, which is in the range of 7 to 70 milligrams per day.
  • Miniatura
    Item type:Ítem,
    Estudio de las propiedades funcionales de la cáscara, pulpa y semilla del capulí (Rosaceae: Prunus sorotina) en estado fresco y congelado
    (Universidad Técnica de Ambato. Facultad de Ciencia e Ingeniería en Alimentos y Biotecnología. Carrera de Ingeniería en Alimentos, 2019-12)
    Chalán Analuisa, Liliana Consuelo
    ;
    Terán Mera, David Andrés
    The present thesis aimed to study the bioactive components of the peal, pulp and seed of the capulí fruit (Prunus serotina). An analysis of fruits collected at different harvest times was performed and their status in fresh and frozen fruits was evaluated. The content of monomeric anthocyanins in fresh fruit peals was 402.39 mg per gram more less 6.11 while frozen fruit presented an average of 245.00 mg per gram more less 6.112. The physical chemical analysis of the pulp showed an average value of soluble solids of 20.8 Brix degrees, 8.84 pH, acidity 0.643 percent of malic acid and 0.7690 percent of ashes, also a high content of reducing sugars 16.02 mg per ml of glucose more less 0.45, which demostrated no statistical differences (P less than 0.05) between the fresh and frozen fruit. In the seed, fatty acids were analyzed, which resulted in a content of Palmite acid 4.56 percent and Stearic acid 3.30 percent, Oleic 33.05 percent, Linoleic 35.57 percent, conjugated trienic acids ɑ-Eleostearic 23.91 percent and ß-Eleostearic 3.62 percent. The antimicrobial effect of anthocyanins in the capuli peal was evaluated using plaque experiments and the 3M™ molecular detection system. In plaque detection, antimicrobial activity could not be observed in gram (+) and gram (-) bacteria such as: Listeria monocytogenes, Staphylococcus aureus, Pseudomona aeruginosa and Escherichia coli. When using the 3M™ system it was observed a reduction in the presence of Listeria monocytogenes (G +) while the absence Escherichia coli 01527 was evidenced.
  • Miniatura
    Item type:Ítem,
    Efecto de la aplicación de atmósferas modificadas en la composición de compuestos bioactivos del tomate de árbol (Solanum betaceum Cav.) variedad mora ecuatoriana
    (Universidad Técnica de Ambato. Facultad de Ciencia e Ingeniería en Alimentos. Carrera de Ingeniería Bioquímica, 2018-03)
    Chicaiza Paredes, Pedro Alejandro
    ;
    Angós Iturgaiz, Ignacio Ángel
    In the present work was studied the influence of several modified atmospheres to preserve the bioactive components of tree tomato (Solanum betaceum Cav.) variety mora ecuatoriana, stored under refrigeration at 4 Celsius degrees during a period of 10 days. First, determination of the antioxidants present in the tree tomato pulp, considering total anthocyanins, total carotenoids, total flavonoids and total polyphenols was carried out. The second part consisted in analyzing the effect of the storage atmospheres on the bioactive content present in the fruit peel, which were total anthocyanins and total chlorophyll. The modified atmospheres used were: (percentage of O2: percentage of CO2): 2.5: 2.5; 2.5: 5.0; 80:10; 80:20 and 90:10. And analysis were carried out on days 1, 4, 7 and 10, in two storage chambers and each one in duplicate. When postharvest storage was considered, the best global results were obtained using the gas combination 80 percent O2 + 20 percent CO2. This treatment allowed to obtain an increase of 12 percent in the total flavonoid content and 11 percent less total chlorophyll content than in the control in the peel. Both results were beneficial due to the increased antioxidant capacity afforded by the flavonoids and the improvement of the external color of the fruit.