http://repositorio.cualtos.udg.mx:8080/jspui/handle/123456789/1123 2026-04-16T11:56:17Z http://repositorio.cualtos.udg.mx:8080/jspui/handle/123456789/1510 Title: Optimization of ultrasonic-assisted extraction of phenolic compounds from Justicia spicigera leaves Authors: Anaya Esparza, Luis Miguel; Ramos Aguirre, Dení; Zamora-Gasga, Víctor Manuel; Yahia, Elhadi M.; Montalvo González, Efigenia Abstract: Abstract A Box–Behnken design (Extraction-time, pulsecycle, sonication-amplitude) was employed to extract phenolic compounds from Justicia spicigera leaves by ultrasonic-assisted extraction. The muicle leaves extracts were analyzed measuring total phenolic compounds and antioxidant capacity. According to response surface methodology the optimal conditions of ultrasonic-assisted extraction to obtain the highest soluble phenolic content were 2 min (extraction time) for 0.7 s (pulse cycle) at 55% of sonication amplitude. Under these optimal conditions, the total phenolic content was higher when was used ultrasonic-assisted extraction (54.02 mg/g) than stirring (46.46 mg/g) and thermal decoction (47.76 mg/g); however, the antioxidant capacity from J. spicigera extracts did not increase by ultrasonic-assisted extraction. The extracts or aqueous infusions from J. spicigera leaves are used for therapeutic proposes, therefore the ultrasonic-assisted extraction is a useful technology to improve the extraction of phytochemicals from J. spicigera leaves. Description: Artículo 2018-08-01T00:00:00Z http://repositorio.cualtos.udg.mx:8080/jspui/handle/123456789/1509 Title: Chapter 5 - Ultrasonic Processing Technology for Postharvest Disinfection Authors: Montalvo González, Efigenia; Anaya Esparza, Luis Miguel; Domínguez Ávila, J. Abraham; González Aguilar Abstract: Abstract: Pathogenic bacteria are developing resistance to some excessively used chemical disinfectants, in particular, to chlorine-based solutions. Increased attention has been paid to technologies that kill or remove pathogens on the surface of fresh products of vegetable origin. Among these technologies, ultrasound (US) is particularly promising, because it ensures the safety and quality of treated products, and can be combined with other sanitizers to produce an additive effect. Numerous reports indicate that some of these combinations increase their individual efficiency, and promote a significantly decreased pathogen population, without significant loss of their sensorial attributes. This information is of special importance for the minimally processed food industry, because the use of innovative sanitizing treatments improves the efficacy of pathogen inactivation on fresh fruits and vegetables, as well as their safety. Description: Capítulo 2018-08-01T00:00:00Z http://repositorio.cualtos.udg.mx:8080/jspui/handle/123456789/1508 Title: Cherimoya (Annona cherimola Mill.). Cap 48 Authors: Anaya Esparza, Luis Miguel; Ramírez Marez, Marco V.; Montalvo González, Efigenia; Sánchez Burgos, Jorge Alberto Abstract: Abstract This chapter focuses on the bioactive compounds present in the cherimoya pulp. Cherimoya, like most fruits, is an important source of natural compounds considered as bioactives. In the edible part of cherimoya, compounds such as polyphenols, tocopherols, phytosterol, diterpernes, and triterpenes have been identified. Some constituents of cherimoya pulp have been associated with different biological activities. In addition, cherimoya pulp is a rich source of bioactive compounds, and their intake can promote the body's defenses and keep people healthy; these compounds may be used to develop pharmaceuticals or nutraceutical agents. The identification, bioavailability and effect of the recommended doses of bioactive compounds are of major importance in order to understand the underlying mechanisms of action and interaction of natural products after ingestion and metabolization in human body. Identification and quantification of the phytochemicals present in the edible part of the fruits have gained importance in recent years, mainly for their potential benefits to human health. Description: Capítulo de libro 2017-10-01T00:00:00Z http://repositorio.cualtos.udg.mx:8080/jspui/handle/123456789/1507 Title: Effect of thermosonication on pathogenic bacteria, quality attributes and stability of soursop nectar during cold storage Authors: Anaya Esparza, Luis Miguel; Méndez Robles, María Dolores; Sáyago Ayerdi, Sonia G; García Magaña, María de Lourdes; Ramírez Mares, Marco V; Sánchez Burgos, Jorge Alberto; Montalvo González, Efigenia Abstract: ABSTRACT In this work, the effect of the thermosonication (TS) on the inactivation of Escherichia coli and Staphylococcus aureus in soursop nectar was evaluated, as well as the quality and stability of the nectar during its storage at 4°C. A reduction of 4.5–5 log CFU/mL was achieved with the TS treatment (24 kHz, average temperature of 50–51°C, acoustic energy density of 1.3–1.4 W/mL for 10 min) in both pathogens. Likewise, thermosonicated nectar retained 85% of ascorbic acid, polyphenol oxidase inactivation and microbiological and physicochemical stability during 30 days at 4°C. Sensorially, the thermosonicated nectar was predominantly preferred over a commercial one. TS is a viable alternative to extend the shelf life of minimally processed soursop nectar. RESUMEN En este trabajo se evaluó el efecto de la termosonicación sobre la inactivación de Escherichia coli y Staphyloccocus aureus en néctar de guanábana; así como la calidad y estabilidad del néctar durante su almacenamiento a 4°C. Se logró una reducción de 4,5–5,0 log CFU/mL con el tratamiento de termosonicación (24 kHz, temperatura promedio de 50–51°C, densidad de energía acústica de 1,3–1,4 W/mL, durante 10 min) en ambos patógenos. Del mismo modo, el néctar termosonicado conservó el 85% de ácido ascórbico, la inactivación de polifenol oxidasa y la estabilidad microbiológica y fisicoquímica durante 30 días a 4°C. Sensorialmente, el néctar termosonicado fue predominantemente preferido sobre un néctar comercial. La termosonicación es una alternativa viable para extender la vida útil del néctar de guanábana mínimamente procesado. Description: Artículo 2017-04-01T00:00:00Z