2.1 Estudios de doctorado y postdoctorado
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PublicaciónNueva orientación de las finanzas públicas(Consejo Nacional de Ciencia, Tecnología e Innovación – Concytec, 1990)Este ensayo aborda una crítica a las teorías político-sociológicas de las finanzas públicas, a las que el autor considera insuficientes para el desarrollo humano. Propone una nueva orientación para las finanzas públicas, argumentando que la actividad financiera del Estado no debe basarse en el arbitrio de los representantes, los gustos de las mayorías, o simplemente en las leyes económicas. En cambio, sostiene que debe fundamentarse en una teoría científica que considere la naturaleza completa del ser humano (material, inmaterial, existencial e historicista) y la capacidad de la sociedad para ser orientada. El autor dedica el estudio a la teoría que da una nueva dirección a la actividad de las finanzas públicas y examina los diversos puntos de partida de las teorías financieras, clasificándolas según su forma y contenido. El ensayo explora el fenómeno financiero, sus elementos, el objeto de la actividad financiera, y la interacción entre las finanzas públicas y la economía, concluyendo que la ciencia de las finanzas debe ir más allá de la observación de hechos para establecer principios basados en datos científicos y filosóficos que busquen la armonía y el desarrollo del ser humano.
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PublicaciónTemas Médicos en odontología(Consejo Nacional de Ciencia, Tecnología e Innovación – Concytec, 1990)Este libro ofrece un resumen de la experiencia docente y asistencial del Dr. Carlos A. Rivas Butrón, con el propósito de proporcionar a estudiantes y profesionales de la salud un compendio práctico de temas médicos relevantes para la odontología. La obra aborda conceptos fundamentales de semiología y patología, incluyendo funciones vitales como la presión arterial, el pulso, la respiración y la temperatura corporal. Además, trata en detalle temas como la inflamación, el dolor (con un enfoque especial en la neuralgia del trigémino), el shock y las quemaduras. El contenido también incluye nociones de anatomía funcional de los aparatos cardiovascular, digestivo y respiratorio, así como una revisión de afecciones hepáticas como las ictericias. El autor busca dotar al odontoestomatólogo de los conocimientos médicos esenciales para un desempeño profesional más completo y una mejor atención al paciente.
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PublicaciónEffects of boom and bust grazing management on vegetation and health of beef cattle used for wildfire prevention in a Mediterranean forest(Elsevier B.V., 2019)Humans and wildfires have historically driven landscape structure in the Mediterranean basin. The Iberian Peninsula is not an exception to that rule, and therefore, farmers, researchers, and governments seek alternative tools to minimize the loss of biodiversity and wildfire risks. Extensive livestock including beef cattle is currently promoted as a suitable management tool by European agro-environmental policies yet pieces of evidence exist regarding the reciprocal effects between cows and Mediterranean woody vegetation. In this work, we performed a field manipulation to evaluate whether free-ranging beef cattle without supplementary feeding, at high density (2 livestock units (LU)/ha) for a short period of time i.e. "boom and bust grazing" management, are able to adapt their grazing preferences to the Mediterranean woody vegetation without health impairment, and prevent from bush encroachment and wildfires. For our purposes, a native herd of 14 adult cows was kept captive without supplementary feeding in a 14 ha enclosure covered by Mediterranean vegetation for two months (April-June 2016). Plant and cattle fecal and blood samples were collected to assess diet composition (plant cuticle microhistological analysis), fecal nitrogen and protein contents of consumed plants, and the nutritional status (non-esterified fatty acids) of cattle. Our results showed that cattle adapted their feeding habits toward a more woody diet including potentially flammable taxa but with some detrimental effects on health status. Hence, cattle cannot control woody vegetation for long periods of time without supplementary feeding. Further research should be oriented to explore other alternative approaches to minimize the health impairment of cattle used for control flammable vegetation in Mediterranean regions.
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PublicaciónOzonation of Adzuki beans (Vigna angularis): Effect on the hydration kinetics, phenolic compounds and antioxidant capacity(Blackwell Publishing Inc., 2018)Ozone is used in grains to guarantee mycotoxin degradation, microbial inactivation, and insect disinfestation. However, its oxidizing properties can promote changes in the grain constituents, affecting both product properties and process behavior. Even so, the effect of ozone processing on quality properties of grains and their process, was rarely studied. Consequently, this work studied the impact of ozonation processing on the hydration kinetics and selected nutritional properties of Adzuki beans (Vigna angularis). As the ozone reactiveness increases at high moistures, three different levels of grain moisture were evaluated. The bean nutritional quality was evaluated considering the total phenolic content and antioxidant capacity (both radicals ABTS and DPPH). The results showed that there was neither significant difference in the hydration kinetics nor in the phenolic compounds and antioxidant capacity after the processing with ozone. Consequently, ozonation is proposed as an alternative in the control of grain contaminants without affecting its quality.
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PublicaciónEthanol production in a simultaneous saccharification and fermentation process with interconnected reactors employing hydrodynamic cavitation-pretreated sugarcane bagasse as raw material(Elsevier B.V., 2017)In this study, sugarcane bagasse (SCB) pretreated with alkali assisted hydrodynamic cavitation (HC) was investigated for simultaneous saccharification and fermentation (SSF) process for bioethanol production in interconnected column reactors using immobilized Scheffersomyces stipitis NRRL-Y7124. Initially, HC was employed for the evaluation of the reagent used in alkaline pretreatment. Alkalis (NaOH, KOH, Na2CO3, Ca(OH)2) and NaOH recycled black liquor (successive batches) were used and their pretreatment effectiveness was assessed considering the solid composition and its enzymatic digestibility. In SSF process using NaOH-HC pretreatment SCB, 62.33% of total carbohydrate fractions were hydrolyzed and 17.26 g/L of ethanol production (0.48 g of ethanol/g of glucose and xylose consumed) was achieved. This proposed scheme of HC-assisted NaOH pretreatment together with our interconnected column reactors showed to be an interesting new approach for biorefineries.
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