Acta Universitaria

5-11

Authors: Nayeli Vera-Ramírez, Alejandro Martínez-Martínez, Guillermo Bojórquez Rangel

In his famous phrase, Dobzhansky said "nothing in biology makes sense except in the light of evolution". By extension, in Neurosciences it could be interpreted as "nothing in neurosciences makes sense except in the light of behavior". The side blotched lizard Uta stansburiana has been widely used as a model organism to understand variation in repro­ductive strategies, which has greatly contributed to enrich the debate on the genetic basis of behavior and its consequences on the evolution of populations. Moreover, researching of Uta stransburiana has yielded interesting results about the modulation of behavior through conserved neuroendocrine pathways through the species; these data allow to establish the neuroendocrine substrate of conserved behavioral among several groups. This review synthesizes some behaviors that have contributed to the understanding of the evolution of morphological and behavioral traits sexual selection and can help to understand reproduc­tive behavior observed in other vertebrate groups.

19-25

Authors: Esther Guadalupe González-Ramírez, Luis Roberto Alarcón-Morales, Alejandro Martínez-Martínez

The current condition of epidemiological and genetic knowledge of the cervical cancer (CC), as well as the development of probabilistic algorithms, allows the approximation of holistic diag­nosis of the CC. It is necessary to consider the interactions between the genome of the host, the viral genomes and the clinical factors of epidemiological risk. This review is divided into four sections: 1) the holistic tools for multivariate model of CC are described; 2) the genetic markers associated with susceptibility to malignant progression of cervical squamous intraepithelial lesions to CC development are explored; 3) the Human Papillomavirus (HPV) as the essential element for CC development is exposed; finally, 4) the clinical factors of risk associated with CC development are considered, such as smoking, sexual habits and risky sexual behavior, sexually transmitted infections and multiparity.

33-42

Authors: Ana Luisa Ramírez Roja, Juan Pedro Benítez Guadarrama

The investigation shows results on levels of job satisfaction in a sample of workers belonging to a top-level educational institution of the State of Mexico. The research was descriptive, cor­relational, explanatory transverse non-experimental design and performed with the universe population belonging to three categories: management and staffing, administrative and lectur­ers. In order to measure job satisfaction it was used Job Satisfaction Index (LSI*66) developed by [1]. The results showed that three of five factors predict job satisfaction and can increase levels of job satisfaction of the institution

5-13

Authors: Jose de Jesus Rodríguez Ibarra, Juan T. Frías Hernández, Víctor Hugo Rangel Hernández

The tanning industry is a source of contamination by hazardous waste generation and special handling. One of these elements is the flesh, which help this study to determine if fleshing is able to add value to a source of employment and a reduction of pollution: production of biodiesel promises to be the sustainable alternative, economically and socially viable. The study was divided into 3 unit processes with a base of 1 kg of biodiesel: a) flesh collection, b) cooked and rendered, c) esterification and transesterification. The impact categories evaluated were the primary energy consumption and the potential nonrenewable emissions of greenhouse gases. As a result of this article, it is had that the tanning is a source of biodiesel economically and environmentally feasible for the least environmental impact occurred. With the availability of annual flesh (79 200 000 kg) can be reduced combustion emissions of CO2 from the air to 11 980 300 kg per year.

25-31

Authors: Maximino Tapia Rodriguez, Salvador Botello, Luz Angélica Caudillo, Héctor Hernández, Iván Munguía, Jacob Esaú Salazar, Ernesto Ortega, Juan Carlos Gómez, Daniel Quiroz, Miguel Yáñez

Se presenta un laboratorio virtual que realiza el análisis, diseño y optimización de estructuras de acero rolado en frío, así como la cuantificación de los materiales utilizados en la construcción de la techumbre completa y el costo de fabricación e instalación la misma. El software está dotado con una interfaz de usuario amigable desarrollado para la empresa “Tejas El Águila”. El análisis estructural considera cargas de peso propio, muertas y vivas, a las que estará sometida la estructura en condiciones de servicio, además de considerarse los efectos de viento y sismo para la República Mexicana -de acuerdo a la normatividad vigente. El optimizador está basado en métodos de minimización de entropía con restricciones múltiples, evaluando cada una de las estructuras por el método de la rigidez. Para la evaluación de la eficiencia de la estructura, se utiliza la normativa American Iron and Steel Institute- Allowable Stress Design (AISI-ASD). La optimización de las estructuras se realiza haciendo múltiples evaluaciones de diferentes configuraciones de las mismas, tarea que se ha paralelizado utilizando técnicas de programación de memoria compartidaOpen Multiprocessing (OpenMP). La combinación adecuada del seguimiento de las normatividades vigentes, la implementación del optimizador y los métodos matriciales para el cálculo de estructuras, aunado al ambiente grafico fácil de usar y amigable, han resultado en un potente software que genera soluciones de vivienda económicas, seguras y estéticas (favoreciendo así a un amplio sector de la sociedad mexicana).

37-46

Authors: Eduardo Fernández Guzmán

This paper proposes a novel view of theoretical and historiographical approaches, as a first attempt, discussing the multicausal nature of contemporary international migration Mexico- United States. The intention is not going deeper into the different causal mechanisms, but only list them and ponder their interaction to better understand this phenomenon that goes beyond the macro-level considerations (economic and political). Migration, understood as a social process, manifests various causes and consequences in their past and present. And, in the case of the mass migration of Mexicans to the United States in recent decades, it is givable to think that this is a product of historical trends, economic asymmetries, of deep social inequalities and poverty in Mexico, of push and the pull factors, tradition and socialization migrant, social networks, transnational communities, symbolisms and collective imaginaries, modernization in transport and communication, migration industry, cultural values and psychological components, among others. It proposal is to analyze briefly this binational contemporary phenomenon under the epistemological consideration that migration is a social process. For this, macro, meso and microstructures will be essential in the explanation.

5-15

Authors: Otilio Arturo Acevedo-Sandoval, Judith Prieto-Mendez, Gilberto Vela-Correa, Enrique Ortiz-Hernández, Francisco Prieto-García

El objetivo fue determinar la petrología y distribución de óxidos de Fe, Al y Si en tres perfiles de suelos de origen volcánico con horizontes endurecidos (fragipán), en la región noroeste del Estado de México. Se utilizaron técnicas químicas selectivas para extraer Fe, Al y Si. El fragipán blanco clasifica petrográficamente como toba dacítica poco soldada y alterada. Los perfiles muestran incipiente a moderado grado de alteración de minerales primarios que contienen Fe y Al dadas las condiciones climáticas de la región. Los contenidos de alofano, ferrihidrita, y óxidos de hierro cristalino se presentan en pocas cantidades, escasos contenidos de Ald y Si lábil en los perfiles indican presencia de aluminosilicatos cristalinos. Bajas relaciones de Alp/Alo y Fep/Feo evidencia que la mayor parte de Al y Fe están unidos a compuestos inorgánicos pobremente cristalinos. Relaciones bajas de Fep/Fed y Alp/Ald indican limitada asociación de Fe y Al con compuestos orgánicos. La relación arcilla/Fed revela emigración de arcilla y óxidos de Fe del horizonte superior al fragipán. El Si, Al y Fe en el fragipán forman parte de la estructura de los silicatos y mínimo grado de cristalinidad de Fe y Al pedogenético. Valores mayores de relación Sid(Sid+Ald) en el fragipán indican aumento en la dureza.