Ver/Abrir - Repositorio Digital - Instituto Politécnico Nacional

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en este parámetro de calidad, con las fresas extranjeras e incluso supera a algunas variedades que se cultivan comúnmente en Michoacán como la Albion y la Chiflon. Por último se estableció la metodología para la evaluación del pelargonidina-3-glucósido por medio del aislamiento por cromatografía en capa fina (TLC) y caracterización por MALDI TOF MS/MS. 2
ABSTRACT In recent years it has been a social tendency to look for a healthier way of life exploring natural options in health care, there is an extended bibliography that describes the benefits of the consumption of natural compounds from plant secondary metabolism. Especially, compounds from phenol family have awakened great interest in scientists. It has been found that berries are some of the richest fruits in phenols structures. Strawberry (Fragaria x ananassa) is now in day one of the most popular fruit in the world, not only for its unique is now in day but also for the benefits to human health of its consumption, due to the phenolic compounds present in this fruit, particularly flavonoids, which have shown to have antioxidant properties. Most prominent among the flavonoids are the anthocyanins, plant colorants responsible for the red color of strawberries. Strawberries are an important part of Mexico's economy, mainly because of their export market. In order to satisfy market needs, Mexican strawberry producers must pay royalties to get plants. Thus, new strawberry varieties showing to be competitive with yield of American and European varieties have been developed in México. However, anything is known about the internal quality of their fruit. The goal of this study was to evaluate the antioxidant capacity of the Mexican strawberry fruits, by measuring inhibition of the free radicals 2,2-difenil-1-picrilhidrazil (DPPH) and the 2,2'azinobis-(3- etilbenzotiazolin 6-sulfonic-acid) (ABTS) in three phenolic fraction obtained from mexican varieties CP. Zamorana and CP. Jacona, and also from foreigner strawberry verities Chiflon, Albion, Festival and Kristal. The flavonoids fraction showed higher antioxidant capacity than the other. The antioxidant capacity of Mexican strawberry varieties, make them competitive with the foreign varieties. Fruits from Jacona and Zamorana varieties had higher antioxidant activity than those from Albion and Chiflon, 3
Page 1: INSTITUTO POLITÉCNICO NACIONAL CEN
Page 5 and 6: Agradezco al Instituto Politécnico
Page 7 and 8: DEDICATORIA Durante el desarrollo d
Page 9 and 10: ÍNDICE DE ILUSTRACIONES Ilustraci
Page 11: RESUMEN En los últimos años ha su
Page 15 and 16: 1. INTRODUCCIÓN En la actualidad,
Page 17 and 18: 2. ANTECEDENTES 2.1. PROBLEMÁTICA
Page 19 and 20: o Consumo elevado de colesterol o C
Page 21 and 22: La oxidación causada por estas esp
Page 23 and 24: ) El radical superóxido reacciona
Page 25 and 26: 2.5. COMPUESTOS FENÓLICOS Un grupo
Page 27 and 28: La estructura de estos pigmentos ve
Page 29 and 30: antocianidina, con uno o varios az
Page 31 and 32: Figura 3: Estructura a básica de l
Page 33 and 34: naringenina, que es un precursor co
Page 35 and 36: glucósidos de cianidina (Galvano y
Page 37 and 38: alergénicos e inflamatorios (Perni
Page 39 and 40: 3. OBJETIVO Evaluar las propiedades
Page 41 and 42: espectro infrarrojo (700-750 nm) co
Page 43 and 44: jeringa capilar de 100 µL a una di
Page 45 and 46: Fotografía 1: Bandas de separació
Page 47 and 48: Diagrama 4: Espectro de absorción,
Page 49 and 50: Tabla 2: Actividad antioxidante por
Page 51 and 52: ABTS que mostró la fracción de an
Page 53 and 54: Tabla 8: Comparación de la activid
Page 55 and 56: 8. DISCUSIÓN En los últimos años
Page 57 and 58: provenientes de las distintas varie
Page 59 and 60: actualidad son dos de las técnicas
Page 61 and 62: 10. BIBLIOGRAFÍA Aaby K, Ekenberg
Page 63 and 64:
Fragaria chiloensis ssp. chiloensis
Page 65 and 66:
Galvano F, La Fauci L, Lazzarino G,
Page 67 and 68:
Matsumoto H, Inaba H, Kishi M, Tomi
Page 69:
Shih P, Yeh C y Yen G2005Effects of
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Ver/Abrir - Repositorio Digital - Instituto Politécnico Nacional

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