Model of Interaction for Academia-Industry-Government to promote the development of human resources in Information Technologies using E-learning

Lourdes-Sánchez-Guerrero,Víctor Gómez-Quintero,Mariem Henaine-Abed,Juan Contreras-Castillo,Ricardo Acosta-Díaz APEC국제교육협력원 2008 Asia-Pacific Cybereducation Journal Vol.4 No.2

Restoration and conservation of anatomic pieces

Camila Cárdenas Guerrero Guzmán,Karen Alejandra Pérez Díaz,María Paula Ruíz Díaz,Valentina Díaz Sánchez,Andrés Camilo Ariza Aguirre,Laura Catalina Cantor Alfonso,Camila Andrea Suárez Ortiz,Davide Fali 대한해부학회 2019 Anatomy & Cell Biology Vol.52 No.3

In this study, a restoration process was developed with potassium hydroxide (KOH), in order to improve each of the structures for their posterior fixation, through the use of new methods such as the Chilean conservative fixative solution (SFCCh), with exceptional results. Restore anatomical pieces corresponding to corpse and organs, being these last set with the SFCCh. In this work dealt with processes of restoration with potassium hydroxide, sodium chloride, and sodium hypochlorite, the process began with the cleanliness and suture of the structures for subsequent fixing in Chilean conservative fixative solution, making use of a corpse and different anatomical parts. Work based on items found in the database, Elsevier, Science Direct, ProQuest, and MEDLINE. At the end of the process of restoration and conservation of the anatomical pieces, was observed an improvement in muscle pigment with decrease of rigidity in the specimen, additionally a recovery of appearance in the vascular-nervous elements was achieved. The organs were much more malleable and the structures facilitate the identification of specific details, its subsequent immersion in SFCCh allows the longer preservation of the obtained results. The restoration with potassium hydroxide allows the improvement in the appearance of the different anatomical structures and simultaneously to facilitate its study. The SFCCh is an alternative that replaces partially the use of formaldehyde. In addition, it presents toxicity reduction.

USO Y DISTRIBUCIÓN DEL TIEMPO EN MUJERES Y HOMBRES OFICIALES DE POLICÍA DE LA CIUDAD DE MÉXICO

Jahel López Guerrero,Abigain Dely García López,Jimena Sánchez Barrenechea Institute of Iberoamerican Studies Pusan Universit 2013 International Journal of Latin American Studies Vol.3 No.1

Abstract. Historically, police workplace has been considered as a male-only-space, with particular characteristics, because it is linked to power and to the legitimate use of it. Therefore, we have decided to investigate whether woman who work in this area are in a process of empowerment. Knowing the existence of diverse factors involved in the process of empowerment, we evaluated time use (classifying time into four categories: paid work time, obligated time, leisure time and unpaid work time) as a tool to analyze gender inequalities and possible changes in status and position in the workplaces and familiar spaces. The aim of this paper is to provide overview data about time use and distribution of women and men who work as police officers in Mexico City Ministry of Public Security, analyzing the distribution of their activities during a working day and during a day off. Even though there was no evidence of gender differences in time use during a working day, we did observe some during a day off, specially attending to unpaid work time and leisure time categories. Palabras clave: tiempo, trabajo, empoderamiento, policías, desigualdades de género. Keywords: time, work, empowerment, police officers, gender inequalities. Resumen. La Policía es un espacio laboral considerado históricamente masculino, que tiene características peculiares al estar ligada al poder y al uso legítimo de la fuerza. Por ello hemos decidido investigar sí las mujeres que laboran en este ámbito están en un proceso de empoderamiento. Sabiendo de antemano que existen diversos factores involucrados en un proceso de empoderamiento, tomamos el tiempo (utilizando las categorías de tiempo de trabajo remunerado, tiempo obligado, tiempo de ocio y tiempo de trabajo no remunerado) como una herramienta para analizar las desigualdades de género y los posibles cambios en la condición y posición de las mujeres, que se pueden estar dando en el ámbito laboral y familiar. El objetivo es presentar los primeros resultados sobre el uso y la distribución del tiempo en mujeres y hombres que realizan trabajo operativo en la Secretaria de Seguridad Pública de la Ciudad de México, analizando las actividades realizadas en un día de trabajo y en un día de descanso. Aunque no se observaron diferencias importantes entre hombres y mujeres en el uso y distribución del tiempo durante un día de trabajo, en el día de descanso sí podemos observar diferencias, sobre todo, en el tiempo dedicado al trabajo no remunerado (doméstico) y ocio.

Cytotoxicity Screening of Several Tomato Extracts

Jose´ Luis Guil-Guerrero,Rebeca Ramos-Bueno,Ignacio Rodríguez-García,Cristóbal López-Sánchez 한국식품영양과학회 2011 Journal of medicinal food Vol.14 No.1

The cytotoxic effects of extracts of the tomato variety “Racimo” have been evaluated through the use of the 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assay at several concentrations. Three extracts—ethanol–water, petroleum ether, and in vitro digested tomato—exhibited in vitro cytotoxicity against the proliferation of the cultured cancer cell line HT-29. The concentration that caused 50% inhibition of cancer cell growth occurred (GI50) of the different extracts for HT-29 cells was 62.5μg/mL for the petroleum ether extract and 87.0μg/mL for the digested tomato extract. For the ethanol–water extract, it was not possible to determine this parameter at the assayed extract concentrations. These results clearly indicate that after the digestion process, the less polar substances, such as carotenoids and sterols, are bioavailable as active species against cancer cells. The GI50 levels for tomato extracts are similar to those values reported for medicinal plants. The results of the MTT assay on nonmutagenic CCD-18 cells showed a lack of negative effect on cell growth, which indicates that tomato extracts act selectively on HT-29 tumor cells. ^1H-Nuclear magnetic resonance spectra confirmed the presence of known compounds with accepted cytotoxic activity against tumor lines (lycopene and β-carotene). The high cytotoxicity for HT-29 cells showed by the petroleum ether extract might be due to the simultaneous presence in the extract of both carotenoids and glyceryl esters of fatty acids. The results of this work clearly indicate the importance of carotenoid consumption on colon tumor proliferation and prevention, and also the importance of the dietary fats in carotenoid bioavailability.

Quality accreditation in Higher Education in México

Juan Contreras-Castillo,Ricardo Acosta-Díaz,Lourdes Sánchez-Guerrero,Norma Baron-Ramírez APEC국제교육협력원 2008 Asia-Pacific Cybereducation Journal Vol.4 No.2

A New Observer Design for Systems in Presence of Time-varying Delayed Output Measurements

Boubekeur Targui,Omar Hernández-González,Carlos-Manuel Astorga-Zaragoza,Gerardo-Vicente Guerrero-Ramírez,María-Eusebia Guerrero-Sánchez 제어·로봇·시스템학회 2019 International Journal of Control, Automation, and Vol.17 No.1

This paper presents a state observer for linear systems and Lipschitz nonlinear systems with delayedoutput measurements, which are affected by a known and bounded time-varying delay. The structure of the proposedobserver is based on a proportional-integral term, which allows to compensate the time-varying delay. The observergain depends on the maximum bounded delay. This gain is computed by a Linear Matrix Inequality (LMI) approach. The observer exhibits good performance for state estimation of the system despite the presence of significantly longdelay. A Lyapunov-Krasovskii functional is used to prove the asymptotical convergence to zero of the observationerror. This observer is applied to the case of systems with time-varying delay whose dynamic is described by apiecewise differentiable function. Examples and numerical simulations are provided in order to support the validityof the main results.

Acute and Repeated 28-Day Oral Dose Toxicity Studies of Thymus vulgaris L. Essential Oil in Rats

Juan Rojas Armas,Jorge Arroyo-Acevedo,Manuel Ortiz-Sánchez,Miriam Palomino-Pacheco,Américo Castro-Luna,Norma Ramos-Cevallos,Hugo Justil-Guerrero,Julio Hilario-Vargas,Oscar Herrera-Calderón 한국독성학회 2019 Toxicological Research Vol.35 No.3

Thymus vulgaris L. is widely used as an ingredient in cooking and in herbal medicine. However, there is little information about its toxicity. The present study was performed to evaluate the acute and repeated 28-day oral dose toxicity of thyme essential oil in rats. For the acute toxicity test, two groups of three rats were used. The rats received a single dose of essential oil: 300 or 2,000 mg/kg of body weight (bw). The rats were observed individually during the first four hours, and then daily until day 14. For the toxicity test with repeated doses, four groups of 10 rats were used. Doses of 100, 250, and 500 mg/kg/day were tested for 28 days. At the end of the experiment, blood was collected and the animals were sacrificed. Histopathological examination showed that in the lungs of rats given the 2,000 mg/kg bw dose, polymorph nuclear infiltrates, hemosiderin macrophages, and interstitial space thickening were present. In the repeated dose study, all rats survived the 28-day treatment period and apparently showed no signs of toxicity. The hematological and biochemical parameters were not altered. The histopathological study of the organs showed severe changes in the lung, with the dose of 500 mg/kg/day; in the other organs, no alterations were observed or the changes were slight. The body weight was only altered in male rats given the 500 mg/kg dose. The relative weight of the organs did not show any significant changes. Our studies revealed that the essential oil of Thymus vulgaris has moderate oral toxicity according to the results of the acute test, whereas the results of the 28-day oral toxicity test suggest that the no-observed-adverse effect level (NOAEL) is greater than 250 mg/kg/day.

Restoration and conservation of anatomic pieces

Camila Cá,rdenas Guerrero Guzmá,n,Karen Alejandra Pé,rez Dí,az,Marí,a Paula Ruí,z Dí,az,Valentina Dí,az Sá,nchez,André,s Camilo Ariza Aguirre,Laura Catalina Can 대한해부학회 2019 Anatomy & Cell Biology Vol.52 No.3

In this study, a restoration process was developed with potassium hydroxide (KOH), in order to improve each of the structures for their posterior fixation, through the use of new methods such as the Chilean conservative fixative solution (SFCCh), with exceptional results. Restore anatomical pieces corresponding to corpse and organs, being these last set with the SFCCh. In this work dealt with processes of restoration with potassium hydroxide, sodium chloride, and sodium hypochlorite, the process began with the cleanliness and suture of the structures for subsequent fixing in Chilean conservative fixative solution, making use of a corpse and different anatomical parts. Work based on items found in the database, Elsevier, Science Direct, ProQuest, and MEDLINE. At the end of the process of restoration and conservation of the anatomical pieces, was observed an improvement in muscle pigment with decrease of rigidity in the specimen, additionally a recovery of appearance in the vascular-nervous elements was achieved. The organs were much more malleable and the structures facilitate the identification of specific details, its subsequent immersion in SFCCh allows the longer preservation of the obtained results. The restoration with potassium hydroxide allows the improvement in the appearance of the different anatomical structures and simultaneously to facilitate its study. The SFCCh is an alternative that replaces partially the use of formaldehyde. In addition, it presents toxicity reduction.