14 research outputs found
Conservación de semen canino
No full text"En la presente monografía se tratan los procedimientos para la conservación de semen canino. Lo que comprende, la anatomía del macho. La evaluación seminal (volumen, color, pH, motilidad, concentración y morfología). Las diferentes técnicas de extracción de semen (manual, vagina artificial, cono látex, electroeyaculador, fármacos y directamente del epidídimo). Los aspectos más importantes de la evolución y desarrollo de la criopreservación de semen en el perro. Esta biotecnología puede ser de moderada o alta complejidad, de bajo o mediano costo, según la técnica y el tipo de semen (fresco, refrigerado o congelado) utilizado. La fertilidad del semen criopreservado es inferior a la del semen fresco. Este hecho está relacionado con los daños subletales instaurados en la población espermática que sobrevive al proceso de congelación. Diversos factores (shock de frío, velocidad de enfriamiento, composición de los diluyentes y estrés osmótico) que ocurren durante el proceso de congelación, son responsables de la disminución de la fertilidad en el semen congelado
Civilizing the Prehispanic: Neo-Prehispanic Imagery and Constructions of Nationhood in Porfirian Mexico (1876-1910)
No full textThis work looks at the artistic production of the Porfiriato (1876-1910) with particular attention to the representation of prehispanic cultures and their incorporation into an official historiography. Whilst highlighting the growing popularity of prehispanic and conquest themes, during the last two decades of the nineteenth century, the research centres on the study of what may be described as a 'neo-prehispanic' genre in order to explore issues of identity and nationalism in the arts.
The use of academic styles for the artistic interpretation of prehispanic material coincides with an already growing concern to redefine prehispanic cultures as 'classical' civilisations. The neo-prehispanic as a style may therefore be understood as a reappropriation of the past via western canons and art schools, and the construction of a neo-prehispanic imagery as a means of 'cleansing' the barbaric.
The analysis concentrates on the function of neo-prehispanic representations by looking at the reception of these images in relation to the aesthetic ideas operating at the time, and their production within the institutional framework of the Academy of San Cartos. It also looks at State-funded projects in order to highlight the cultural politics of the Porfiriato which sought to celebrate the cultural legacies of prehispanic Mexico. The study will hence seek to explore the particularities of a national style, the function of art in the Porfiriato, and the relationship between artistic production and the construction of a national identity. All of this will be looked at in relation to history painting, monuments and architecture.
The main objectives of the research aim to be both practical (a catalogue of material
'Appendix B'), and interpretative. The correct cataloguing and identification of this material together with an analysis of their function within the context of Porfirian society will provide invaluable material for more research, and will constitute the original contribution of my PhD
Bebida funcional libre de gluten elaborada con harinas extrudidas de quinoa integral y chía desgrasada: potencial antioxidante y antihipertensivo
No full textThe current market demands gluten-free (GF) foods with better nutritional/nutraceutical value. In this study, a functional GF beverage (GFB) from a flours mixture of optimized extruded quinoa (OEQ) (70%) and extruded defatted chia (EDC) (30%) was developed. To obtain OEQ, a central composed experimental design with two factors (extrusion temperature [TE] = 60 °C-140 °C and screw speed [VT] = 60 rpm-240 rpm) and three responses (antioxidant activity [AoxA], total phenolic compounds [TPC], and in vitro protein digestibility [IVPD]) was used. The optimal extrusion conditions for OEQ were 138 °C/138 rpm, and for EDC they were 147 °C/237 rpm (obtained in a previous work). The mixture had calculated protein efficiency ratio (C-PER) = 2.28 and angiotensin-converting enzyme (ACE) inhibitory potential (IC50) = 0.271 mg/ml. 200 ml of functional GFB contains 5.61 g of good quality protein, 6.13 g of dietary fiber, 88 kcal, and AoxA = 5091 μmol TE. The functional GFB is a healthy alternative for celiac people.El mercado actual demanda alimentos libres de gluten (LG) con mejor valor nutricional/nutracéutico. En este estudio, se desarrolló una bebida LG (BLG) funcional a partir de una mezcla de harinas de quinoa extrudida optimizada (QEO) (70%) y chía desgrasada extrudida (CDE) (30%). Para obtener QEO se usó un diseño experimental central compuesto con dos factores (temperatura de extrusión [TE] = 60 °C-140 °C y velocidad de tornillo [VT] = 60 rpm-240 rpm) y tres respuestas (actividad antioxidante [AAox], compuestos fenólicos totales [CFT] y digestibilidad proteínica in vitro[DPIV]). Las condiciones óptimas de extrusión para QEO fueron 138 °C/138 rpm y para CDE fueron: 147 °C/237 rpm (obtenidas en trabajo previo). La mezcla tuvo relación de eficiencia proteínica calculada (C-PER) = 2.28 y potencial inhibitorio de enzima convertidora de angiotensina (ECA) (IC50) = 0.271 mg/ml. 200 ml de BLG funcional contiene 5.61 g proteína de buena calidad, 6.13 g fibra dietaria, 88 kcal y AAox = 5091 μmol ET. La BLG funcional es una alternativa saludable para personas celiacas
Political Discourse and Neoliberal Reform in Mexico 1988-1994.
No full textPhDThis thesis examines the impact of economic liberalism on the dominant source of
legitimation in Mexico - nationalism - during the presidency of Carlos Salinas de
Gortari (1988-94). It asks whether national ideology remained of value as a
legitimising force given the ways in which neoliberalism challenged its social rationale
and looks at the search for a new basis of consensus. The thesis argues that salinismo
continued to find nationalism valuable to maintaining consensus by providing a
formula which could mediate rival individual and social claims. It analyses
nationalism through the content attributed to the individual and the social in political
discourse of the period.
Chapter 1 argues that a relationship has existed between political economy and
national ideology since Mexico's independence. This has been determined by elites
seeking to establish a state sufficiently stable to enable economic development. In the
20th century, conceptions of nationality provided criteria for "nation-building", the
creation of an integrated citizenry free of divisions which threatened stability. Chapter
2 argues that Salinas continued to find nationalism of legitimising value to his own
state reforms, but adapted it to neoliberal priorities.
Chapters 3 and 4 focus on how Salinas dealt in two instances - landholding and
free trade - with conflicts generated by rival conceptions within nationalism and
neoliberalism of the individual and sovereignty. Chapter 5 examines how intellectuals
reassessed nationalist ideology, and how the new models of community they imagined
reflected the search for a legitimising formula functional to the new political economy.
Chapters 6 and 7 argue that opposition parties on Left and Right also sought such a
formula and assessedth e need to mediate individual and social claims.
The thesis contributes to an understanding of the role nationalism has played in
Mexico's capitalist development, shedding light upon its fate within accelerated
modernisation
Propuesta y mejoramiento de vivienda en vecindad, atendiendo la problematica de reconstruccion urbano arquitectonica, en el barrio de Santa Maria La Redonda, Col Guerrero, Delegacion Cuauhtemoc, Ciudad de Mexico
No full textEfecto de la extrusión en la elaboración de un pienso a base de Moringa oleifera Lamy Zea mays como un sustituto parcial de la harina de pescado en la dieta de la etapa adulta de Oreochromis niloticus
No full textLa creciente demanda de harina de pescado, así como la búsqueda de alimentos sostenibles, ha llevado al desarrollo de alimentos basados en subproductos y el uso de harinas vegetales, promoviendo la eliminación de alimentos poco asimilados y/o mal consumidos en la acuicultura. Estas son las principales fuentes de los problemas económicos, nutricionales y ambientales en el cultivo intensivo de tilapia del Nilo (Oreochromis niloticus). La cantidad de proteína procedente de la harina de pescado en la dieta de los peces está por encima de los requisitos nutricionales y la tilapia no consume los alimentos que no flotan, lo que provoca un exceso de racionamiento. Este estudio explora el efecto de la extrusión en la elaboración de un pienso a base de harina de hoja de Moringa (Moringa oleifera Lam) y Zea mays como un sustituto parcial de la harina de pescado en la dieta de la etapa adulta de Oreochromis niloticus. El análisis reveló que la dieta propuesta proporciona propiedades físicas deseables para la alimentación de los peces y su crecimiento óptimo de tilapia, debido a que presentan un contenido ideal de proteína para la etapa adulta y características como la velocidad de hundimiento, densidad y durezaThe rising demand for fishmeal, as well as the search for sustainable active food, has led to the development of food-based on by-products and the use of vegetable flours, leading to the elimination of poorly consumed and poorly assimilated food from aquaculture. These are the main economic, nutritional and environmental problems in the intensive cultivation of Nile tilapia (Oreochromis niloticus). The amount of fish protein in fish diets is above nutritional requirements.And tilapia does not ingest the food that does not float, leading to over-rationing. This study explores the effect ofextrusion on the elaboration of a feed based on Moringa leaf flour (Moringa oleiferaLam) and Zea maysas a partial substitute of fishmeal in the diet of the adult stage of Oreochromis niloticus. The analysis revealed that the combination provides desirable physical properties for the feeding of the fish, and their optimal growth of tilapia because they present a content ideal of protein for the adult stage and characteristics such as the velocity of sinking, density, and hardnes
Efecto del Proceso de Nixtamalización Tradicional y Extrusión sobre la Bioaccesibilidad y Actividad Antioxidante de Compuestos Fenólicos de Tortillas de Maíz Azul Durante la Fermentación In Vitro por la Microbiota Colónica Humana
No full textIn recent years, tortillas made with pigmented maize have garnered interest due to their contribution of polyphenols, considered natural antioxidant compounds with antihypertensive, antidiabetic, and anti-carcinogenic properties. In maize, the greatest contribution of polyphenols is in insoluble form. These secondary metabolites are released by the colonic microbiota making them more bioaccessible to the organism. In the present work, bioaccessibility, release of phenolic compounds, and antioxidant activity by colonic microbiota in tortillas, made with nixtamalized (NMT) and extruded (EMT) blue maize, were evaluated and compared. EMT had higher protein, lipid, and ash content than NMT. However, NMT had higher anthocyanin content than its counterpart EMT (4.01 and 2.28 mg CGE/100 g, dw). The bound phenolic fraction in both tortillas represents > 80 %. At 5 h of in vitro fermentation by colonic microbiota, NMT showed the highest average in phenolic release, bioaccessibility, and antioxidant activity [11.78 mg GAE/ g, dw, 88.23 %, and 569.82 (ORAC) and 26.76 (ABTS) µmol TE/g] than EMT. The use of traditional nixtamalization to produce maize tortillas will continue to be the main process that brings health benefits to consumers.En los últimos años las tortillas elaboradas con maíces pigmentados han despertado interés debido al aporte de polifenoles, los cuales son considerados antioxidantes naturales y poseen propiedades antihipertensivas, antidiabéticas, y anticarcinogénicas. En maíz, el mayor aporte de polifenoles se encuentra en forma insoluble. Estos metabolitos secundarios son liberados por la microbiota del colón haciéndolos más bioaccesibles para el organismo. En el presente trabajo se evaluó y comparó bioaccesibilidad, liberación de compuestos fenólicos y actividad antioxidante por la microbiota colónica en tortillas elaboradas con maíz azul nixtamalizado (NMT) y extrudido (EMT). Las EMT presentaron mayor contenido de proteína, lípidos y cenizas, con respecto NMT. Sin embargo, NMT presentó mayor contenido de antocianinas que su contraparte EMT (4.01 y 2.28 mg ECG/100 g, bs). La fracción de fenólicos ligados en ambas tortillas representa > 80 %. A las 5 h de fermentación in vitro por la microbiota del colon, NMT mostró el mayor promedio de liberación y bioaccesibilidad de fenólicos, y actividad antioxidante [11.78 mg EAG/g, bs, 88.23 %, y 569.82 (ORAC) y 26.76 (ABTS) µmol ET/g] que EMT. El proceso de nixtamalización tradicional para elaborar tortillas seguirá siendo clave importante para el aporte de beneficios en la salud de los consumidores
Physicochemical, Structural, and Proteomic Analysis of Starch Granules from Maize Landraces of Northwest Mexico
No full text
Nahuatl in the Huasteca Hidalguense : a case study in the sociology of language
No full textThis thesis examines the vitality of Hidalgo Nahuatl (HN) in the
communities of Jaltocan, Panacaxtlan, Santa Cruz, Santa Teresa
and Zohuala in the Huasteca Hidalguense, Mexico.
The research, conducted in Mexico and St. Andrews University
from 1976-1982, applies an analysis of HN within the framework of
the Sociology of Language and Dependency Theory, thereby using a
multi-disciplinary approach. Through an investigation of the historical,
social, cultural and economic factors related to HN, the
latter is embedded in its reality.
HN is shown to be originally a language of dependency and oppression,
supported by a long mestizo tradition of "caciquismo". It is
demonstrated that an increasing number of Spanish (S) monolinguals,
together with other socio-economic factors, is encouraging Nahuas
to bilingualize and S:: =A. is fast becoming the new language of dependency.
The Hidalgo Nahuas possess practical reasons for the acquisition
of S., these being to solve their daily problems - especially
land tenancy -, to communicate with the mestizo out-group and to
undertake trading with non-HN speakers. However, the Nahuas are
not surrendering their native language as they bilingualize, but
rather, tend to limit its usage to native Nahua contexts and speakers.
HN has become important to the Nahuas in order to demonstrate
their ethnic identity and territoriality.
The introduction of government projects to the communities, such as
the Castellanizacion project or bilingual-bicultural education, are
shown to be theoretically bilingual in approach, but fail to take
into account sufficiently the regional Indian language in the praxis.
The stable maintenance of HN is highlighted by statistical results
from the word-count of recorded texts, documents and publications
and the range of morphological phenomena affecting S. words
in HN is described with examples from the Corpus.
The linguistic interference from S. in HN is located within Dependency
Theory and this author suggests the use of the term dependency
word rather than loan word and dependency language, thus implying
a diachronic sociological process which is reflected in HN.
Extended Texts are offered as evidence of the linguistic standard
of HN and attitudes of Nahuas towards their language are presented.
The final conclusion is that modern HN is a viable, vital and
functional language at the time of undertaking this research and
demonstrates a frequent usage by a large number of speakers. HN
has still not entered into:. -avital process of language death, as
is the case in other Nahuatl-speaking regions of Mexico, and is
still being maintained, particularly at community level, by adults
and children alike
