oalib

Publish in OALib Journal

ISSN: 2333-9721

APC: Only $99

Submit

Any time

2019 ( 15 )

2018 ( 33 )

2017 ( 33 )

2016 ( 50 )

Custom range...

Search Results: 1 - 10 of 15384 matches for " Mariolga Reyes Cruz "
All listed articles are free for downloading (OA Articles)
Page 1 /15384
Display every page Item
Ni con dios ni con el diablo : Tales of survival, resistance, and rebellion from a reluctant academic
Mariolga Reyes Cruz
Decolonization : Indigeneity, Education & Society , 2012,
Abstract: Contemporary social movements challenge dominant ideas about democracy, freedom, independence, and autonomy as the daily experiences of the marginalized show these ideas have not lead to decolonization. When one examines academic knowledge production and academic institutions, common assumptions about “autonomy” and “freedom” clash with the expectation to submit to institutionalized cannons. At issue here are the ways in which the academic establishment reproduces the coloniality of power. For radical sociologist Aníbal Quijano, coloniality of power is a pattern of domination that articulates the multiple forms of exploitation that took hold at a global scale with the conquest of Abia Yala (The Americas). As Lao-Montes (2010) explains, the exploitation of work by capital, as a pattern of coloniality, is expressed in all forms of labor organization that are subordinated to the process of accumulation of global capital. For those of us committed to knowledge production from a decolonizing standpoint, the challenge is to elaborate strategies of resistance to the reproduction of coloniality in our daily practice. This autoethnographic paper explores (de)coloniality from the author’s experiences in survival and resistance as she faces the precarization and privatization of academic work and the possibilities for deeply emancipatory knowledge production.
Variaciones hematológicas en pacientes con malaria causada por Plasmodium vivax antes, durante y después del tratamiento
González,Brunnell; Rodulfo,Hectorina; De Donato,Marcos; Berrizbeitia,Mariolga; Gómez,Cruz; González,Letty;
Investigación Clínica , 2009,
Abstract: in order to determine the relationship between hematological parameters, parasitaemia and malaria episodes, we evaluated 59 individuals of both sexes, infected with plasmodium vivax and 30 controls from sucre state. blood samples were obtained by venous puncture and from the earlobe at day of diagnosis, 8 and 30 days post-diagnosis. we carried out hematological analysis, microscopic and molecular (pcr) diagnosis and the parasitaemia was calculated. there were significant differences by sex for hemoglobin, erythrocytes and hematocrit (p < 0,01 in all three analysis). these values in males, decreased by day 8 with respect to day 0 (p < 0,001; p = 0,006 y p = 0,025, respectively). in females, significant differences were only seen in hemoglobin and hematocrit between controls and patients (p < 0,001). the average number of leucocytes at the day of diagnosis was within the reference values, but slightly lower compared to the controls and the samples during and after the treatment. the average proportion of eosinophils was higher than normal for both, controls and patients, during and after the treatment. thrombocytopenia was observed at diagnosis, but a week after, the values increased significantly (p < 0,001). there was an inverse relationship between parasitaemia and platelet count and a direct relationship between the first and hemoglobin at day 0, as well as with the difference in platelet counts between day 0 and day 8 (p = 0,044 y p = 0,014, respectively). this difference was the only parameter related to the number of malaria episodes (p = 0,040). thrombocytopenia showed to be an indicator of acute malaria.
Ventral Tegmental Area Neuronal Activity Correlates to Animals’ Behavioral Response to Chronic Methylphenidate Recorded from Adolescent SD Male Rats  [PDF]
Zachary Jones, Cruz Reyes Vazquez, Nachum Dafny
Journal of Behavioral and Brain Science (JBBS) , 2014, DOI: 10.4236/jbbs.2014.44020
Abstract: Methylphenidate (MPD) is considered as the first-line pharmacotherapy to treat ADHD. More recently, MPD has also been used as a cognitive enhancement recreationally. Its therapeutic effects are not fully understood, nor are the long term effects of the drug on brain development. The ventral tegmental area (VTA) neuronal activity was recorded from freely behaving adolescent rats using a wireless recording system. Five groups were used: saline, 0.6, 2.5, 5.0 and 10.0 mg/kg MPD. The experiment lasted for 10 days. This study demonstrated that VTA neurons respond to MPD in a dose response characteristic and the same dose of MPD can cause both behavioral sensitization and behavioral tolerance. The neuronal unit activity was evaluated based on the animals’ behavioral activity following chronic MPD administration. The study showed that the animals’ behavioral response to different acute MPD of 0.6, 2.5 and 10.0 mg/kg doses responded in a dose response characteristics. Moreover, the same chronic dose of 0.6, 2.5, and 10.0 mg/kg MPD elicits in some animals’ behavioral sensitization and in some others behavioral tolerance. Therefore, the neuronal activity recorded from animals expressing behavioral sensitization was analyzed separately from the neuronal activity recorded from of behaviorally tolerant animals and it was found that the VTA units of the behaviorally sensitization animals responded significantly different to the drug than those VTA units recorded from animals expressing behavioral tolerance.
EL COJíN NEUMáTICO COMO UNA EXPERIENCIA DE LABORATORIO
Greis Julieth Cruz Reyes
Gondola : Ense?anza y Aprendizaje de las Ciencias , 2010,
Abstract: Describes the construction of an air cushion table with a working guide that encourages the development of certain thinking skills which allow greater depth in the concepts through which mental models are descriptions own simulations based on different physical phenomena , this assembly creates a cushion of air that results in movement without friction, magnets on the surface chips off the table. The work guides give the guidelines leading to analyze simulations of physical phenomena where the dissipative factors can be considered approximately zero. The present article describes the construction of the air cushion and some applications to the introduction of concepts such as, gas pressure, relationship pressure volume and random motion of particles.
De la Brigada Médica Cubana Parirenyatwa Group Hospital en Zimbabwe. 2012. X Jornada Científica en Zimbabwe/Harare From “Parirenyatwa Group Hospital” Cuban Medical Brigade in Zimbabwe 2012. 10th Scientific Event in Zimbabwe/Harare
Marcelina Cruz Reyes
Revista de Ciencias M??dicas de Pinar del R?-o , 2012,
Abstract:
Ritalin Dose Response Effect on Medial Prefrontal Cortex and on Animal Behavior  [PDF]
Cruz Reyes-Vasquez, Corey J. Cannon, Nachum Dafny
Journal of Behavioral and Brain Science (JBBS) , 2016, DOI: 10.4236/jbbs.2016.63015
Abstract: The prefrontal cortex (PFC) is involved in complex planning, learning, memory, attention and integrates sensory information. It was reported that the PFC was dysfunctional in attention deficit hyperactivity disorder (ADHD). Methylphenidate (MPD), a drug often prescribed for the treatment of ADHD, has potential for abuse and misuse. Most MPD studies were completed in adult subjects; however, most users were adolescents. The objective of this study was to investigate the acute and chronic dose response characteristics of MPD on PFC neuronal activity recorded in freely behaving adolescent rats. Four groups of animals were used: saline (control), 0.6, 2.5, and 10 mg/kg MPD. Acute MPD elicited a dose response increase in animals’ locomotor activity. Rechallenge with MPD at experimental day (ED10) when compared to the effect of MPD at ED1 showed no significant differences. When the animals were divided into two groups based on their individual responses to chronic MPD exposure, some animals expressed behavioral tolerance and some expressed behavioral sensitization. Electrophysiologically, a dose response characteristic for acute and chronic MPD exposure was observed. With increasing MPD doses, more PFC units responded by changing their firing rate. Moreover, the neuronal responses to chronic MPD recorded from animals expressing behavioral tolerance were significantly different compared to the neuronal population responses recorded from animals expressing behavioral sensitization. The majority of the PFC units recorded from animals expressing behavioral tolerance responded to MPD predominately by decreasing their firing rates, whereas PFC units recorded from behaviorally sensitized animals mainly showed an increase in their firing rates.
Rese a Histórica de la Universidad Nacional Autónoma de Honduras
Víctor C. Cruz-Reyes
Revista Historia de la Educación Latinoamericana , 2005,
Abstract: Los colegios mayores jugaron un importantísimo papel en la época colonial, pues a partir de sus egresados, se constituyeron los anhelos de apertura de las aulas universitarias inicialmente en la ciudad de Guatemala y posteriormente en el resto de sus provincias, algunas de las cuales llegaron a contar con universidades hasta en las primeras décadas del período independiente. En el caso de León, Nicaragua, ésta fue la segunda universidad que se fundó el a o de 1812, luego de la de Guatemala, mientras que en Honduras, su universidad se llegó a fundar hasta mediados del siglo XIX en la ciudad de Tegucigalpa, gracias a las gestiones realizadas por el Presbítero José Trinidad Reyes y un grupo de amigos que le ayudaron enormemente. Inicialmente se fundó la Sociedad del Genio Emprendedor del Buen Gusto concebida por jóvenes hondure os egresados de la Universidad de León, Nicaragua. Ellos fueron: Máximo Soto, Alejandro Flores, Miguel Antonio Rovelo, Yanuario Girón y Pedro Chirinos, los que formularon de la mejor manera posible, los estatutos correspondientes hasta lograr su establecimiento en Tegucigalpa el 14 de diciembre de 1845. Su primer rector fue el padre José Trinidad Reyes, convirtiéndose al poco tiempo en la piedra angular de la máxima casa de Estudios de Honduras. Con el transcurso de los a os, la Universidad Nacional, se fue desarrollando paulatinamente. En el a o de 1957, logró su tan anhelada autonomía, lo que le permitió elevar aún más sus condiciones de desarrollo a través de su propia administración. No obstante en los últimos a os, ha habido por parte del Gobierno y de algunos sectores, reacciones en contra de su autonomía, ocasionando su retroceso académico administrativo que provocaron que en el mes de diciembre del a o pasado fuera emitida, por parte del Honorable Congreso Nacional, una nueva ley que la reforma y se espera la coloque en un marco diferente que tiende hacia su propio progreso o desarrollo a partir de este a o.
Logarithm of a Function, a Well-Posed Inverse Problem  [PDF]
Silvia Reyes Mora, Víctor A. Cruz Barriguete, Denisse Guzmán Aguilar
American Journal of Computational Mathematics (AJCM) , 2014, DOI: 10.4236/ajcm.2014.41001
Abstract:

It poses the inverse problem that consists in finding the logarithm of a function. It shows that when the function is holomorphic in a simply connected domain , the solution at the inverse problem exists and is unique if a branch of the logarithm is fixed. In addition, its demonstrated that when the function is continuous in a domain , where is Hausdorff space and connected by paths. The solution of the problem exists and is unique if a branch of the logarithm is fixed and is stable; for what in this case, the inverse problem turns out to be well-posed.

Melatonin Avoids Anatomofunctional Changes Associated to Aging in a Rat Model  [PDF]
Bertha Prieto Gómez, Cruz Reyes-Vázquez, Mireya Velázquez-Paniagua
Advances in Aging Research (AAR) , 2014, DOI: 10.4236/aar.2014.34041
Abstract: Melatonin is a hormone synthesized and released primarily by the pineal gland. Its secretion fol-lows a circadian rhythm with a peak overnight. Its secretion is initiated approximately to the three months of age and continues to rise during the childhood. Previous to the puberty there is a de-crease of melatonin secretion that continues until the old age. Melatonin has effects in the body and acts through at least four mechanisms: membrane receptors, orphan nuclear receptors, calmodulin and free radicals. It has been suggested that aging can be a consequence of the oxidation of cells that eventually become vulnerable to injury and die. This work reviews the antioxidant effects of melatonin in a rodent model, on the formation of free radicals, on the MAP2 protein expression and on the electrophysiology of the hippocampus at different ages. The results indicate that melatonin maintains in a “best” state to the experimental animals compared to controls. It suggests the use of melatonin as a therapy to prevent or delay the aging effects on the cells.
Analysis of Ozone Behaviour in the City of Puebla-Mexico Using Non-Homogeneous Poisson Models with Multiple Change-Points  [PDF]
Juan Antonio Cruz-Juárez, Hortensia Reyes-Cervantes, Eliane R. Rodrigues
Journal of Environmental Protection (JEP) , 2016, DOI: 10.4236/jep.2016.712149
Abstract: In this work, some non-homogeneous Poisson models are considered to study the behaviour of ozone in the city of Puebla, Mexico. Several functions are used as the rate function for the non-homogeneous Poisson process. In addition to their dependence on time, these rate functions also depend on some parameters that need to be estimated. In order to estimate them, a Bayesian approach will be taken. The expressions for the distributions of the parameters involved in the models are very complex. Therefore, Markov chain Monte Carlo algorithms are used to estimate them. The methodology is applied to the ozone data from the city of Puebla, Mexico.
Page 1 /15384
Display every page Item


Home
Copyright © 2008-2017 Open Access Library. All rights reserved.