Autonomous University of Campeche
Campeche, Mexico

The Autonomous University of Campeche is a Mexican public university based in the city of Campeche, Campeche, but with several campuses across the state. It was originally founded in 1965 as the Universidad del Sudeste .Its library holds over 18,000 volumes. Wikipedia.

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Figueroa-Valverde L.,Autonomous University of Campeche
Cardiovascular & hematological agents in medicinal chemistry | Year: 2017

BACKGROUND: There are data indicating that several azonine-derivatives may exert effects on some biological systems; however, there is very low information on the biological activity induced by these compounds on left ventricular pressure.OBJECTIVE: The aim of this study was to synthesize and evaluate the biological activity of new triazoninederivative on left ventricular pressure.MATERIAL AND METHODS: The first stage involved: 1) preparation of two azepine-benzamide derivatives (Z or E) by reaction of the nitrobenzoyl azide with adrenosterone; and 2) reaction of (Z)-azepine-benzamide derivative with ethylenediamine to form the triazonine derivative. The structure of compounds was confirmed by spectroscopy and spectrometry data. The second stage involved the biologic activity on left ventricular pressure was evaluated in a model of rat heart isolated. In addition, some physicochemical parameters were evaluated to characterize the possible molecules involved in its effect.RESULTS: The results showed that only the triazonine increased left ventricular pressure via androgen receptor.CONCLUSIONS: In conclusion, this phenomenon is conditioned by the functional groups involved in the chemical structure of triazonine derivative and their interaction with residues of amino acids involved on the androgen receptor surface. Copyright© Bentham Science Publishers; For any queries, please email at

Rendon-Von Osten J.,Autonomous University of Campeche | Dzul-Caamal R.,Autonomous University of Campeche
International Journal of Environmental Research and Public Health | Year: 2017

The use of pesticides in Mexican agriculture creates an interest in learning about the presence of these substances in different environmental matrices. Glyphosate (GLY) is an herbicide widely used in the state of Campeche, located in the Mayan zone in the western Yucatan peninsula. Despite the fact that GLY is considered a non-toxic pesticide to humans, its presence in water bodies through spillage, runoff, and leaching are a risk to human health or biota that inhabit these ecosystems. In the present study, glyphosate residues were determined in groundwater, bottled drinking water, and the urine of subsistence farmers from various localities of the Hopelchén municipality in Campeche. Determination of GLY was carried out using Enzyme-Linked Immunosorbent Assay (ELISA). The highest concentrations of GLY were observed in the groundwater (1.42 μg/L) of Ich-Ek and urine (0.47 μg/L) samples of subsistence farmers from the Francisco J. Mújica communities. The glyphosate concentrations in groundwater and bottled drinking water indicate an exposure and excessive use of glyphosate in these agricultural communities. This is one of the first studies that reports glyphosate concentration levels in human urine and bottled drinking water in México and in the groundwater in the Yucatan Peninsula as part of a prospective pilot study, to which a follow-up will be performed to monitor this trend over time. © 2017 by the authors. Licensee MDPI, Basel, Switzerland.

Hernandez O.H.,Autonomous University of Campeche
Biological Rhythm Research | Year: 2017

The omitted stimulus potential (OSP) is a type of event-related potentials elicited by cognitively-relevant stimuli associated with mental processes in humans. Crayfish also emit OSP when an expected stimulus does not arrive, although this is not considered to index a high-level cognitive event, but it is endogenous in nature because this depends on the recent history and arousal state of the animal. Although OSP is highly conserved in evolution, it had not been the subject of circadian study. Our hypothesis is that OSP, recorded in crayfish brain (Procambarus clarkii) has a circadian behaviour in its firing pattern. OSPs show circadian rhythms in both the latency and in the OSP/Sp ratio, under free-running (light:light, LL) and photoperiod (light:dark, LD) conditions, with main peaks during the daytime. This is the first report that shows a circadian pattern of OSP. © 2017 Informa UK Limited, trading as Taylor & Francis Group

Vidal-Martinez V.M.,CINVESTAV | Pech D.,CINVESTAV | Pech D.,Autonomous University of Campeche | Sures B.,University of Duisburg - Essen | And 2 more authors.
Trends in Parasitology | Year: 2010

This review assesses the usefulness of parasites as bioindicators of environmental impact. Relevant studies published in the past decade were compiled; factorial meta-analysis demonstrated significant effects and interactions between parasite levels and the presence and concentration of various pollutants and/or environmental stressors. These effects and interactions were also evident in subsets of studies that used different methods such as field surveys or experimental exposure. From this meta-analysis we conclude that parasites are useful bioindicators of environmental impact. Further, by examining aspects of study design, we put forward recommendations for the design of future studies to evaluate anthropogenic impact on host-parasite interactions and increase the efficiency of environmental monitoring programs. © 2009 Elsevier Ltd.

Casanova-Rosado J.F.,Autonomous University of Campeche
The West Indian medical journal | Year: 2013

To determine the prevalence of daily tooth brushing and evaluate some variables associated. A cross-sectional study was carried out in 320 schoolchildren six to nine years old in Campeche, Mexico. Information on sociodemographic and socio-economic variables, oral hygiene practices and attitudes were collected through a questionnaire. The frequency of tooth brushing was categorized as "0" = fewer than seven times/week, "1" = at least once a day. In the analysis, nonparametric tests were used. Mean age was 6.99 +/- 1.00 years, 52.5% were boys. The prevalence of daily tooth brushing was 81.6%. In bivariate analysis, the prevalence of tooth brushing was higher (p < 0.05) among the children of mothers with higher schooling (9.80 years vs 8.47 years, p < 0.05), and in younger children (84.6% in 6-7-year olds vs 71.2% in 8-9-year olds, p < 0.05). A slight, non-significant association (p < 0.10) was noted between the current frequency of tooth brushing and an earlier age when the child first started brushing with toothpaste. There were no statistically significant differences (p > 0.05) in the frequency of tooth brushing by gender or by the mother's attitude toward the oral health of her child. The prevalence of daily tooth brushing was high compared to other studies. Mother's maximum level of schooling (as an indicator of socio-economic position) was associated with higher frequency of tooth brushing. Maternal characteristics are associated with the oral health behaviour of their children.

Blum-Dominguez S.,Autonomous University of Campeche
Revista médica del Instituto Mexicano del Seguro Social | Year: 2011

Trypanosoma cruzi was isolated from a 20 year old male with no evidence of antibodies against this parasite until 12 months after the isolation and with no electrocardiographic alterations. The isolated sample obtained was characterized as T. cruzi I through PCR mini-exon. It had been reported without serologic reactivity to T. cruzi. It is the first case with lack reactivity reported in Mexico.

Hernandez O.H.,Autonomous University of Campeche | Vogel-Sprott M.,University of Waterloo
Journal of Psychophysiology | Year: 2010

A missing stimulus task requires an immediate response to the omission of a regular recurrent stimulus. The task evokes a subclass of event-related potential known as omitted stimulus potential (OSP), which reflects some cognitive processes such as expectancy. The behavioral response to a missing stimulus is referred to as omitted stimulus reaction time (RT). This total RT measure is known to include cognitive and motor components. The cognitive component (premotor RT) is measured by the time from the missing stimulus until the onset of motor action. The motor RT component is measured by the time from the onset of muscle action until the completion of the response. Previous research showed that RT is faster to auditory than to visual stimuli, and that the premotor of RT to a missing auditory stimulus is correlated with the duration of an OSP. Although this observation suggests that similar cognitive processes might underlie these two measures, no research has tested this possibility. If similar cognitive processes are involved in the premotor RT and OSP duration, these two measures should be correlated in visual and somatosensory modalities, and the premotor RT to missing auditory stimuli should be fastest. This hypothesis was tested in 17 young male volunteers who performed a missing stimulus task, who were presented with trains of auditory, visual, and somatosensory stimuli and the OSP and RT measures were recorded. The results showed that premotor RT and OSP duration were consistently related, and that both measures were shorter with respect to auditory stimuli than to visual or somatosensory stimuli. This provides the first evidence that the premotor RT is related to an attribute of the OSP in all three sensory modalities. © 2010 Federation of European Psychophysiology Societies.

Garcia-Ochoa E.,Autonomous University of Campeche | Corvo F.,Autonomous University of Campeche | Corvo F.,University of Habana
Electrochemistry Communications | Year: 2010

Chaos theory and the use of fractal geometry originated a new methodology to study EN signals obtaining new information on corrosion processes. A clear direct relationship is obtained between fractal analysis of EN time series and images. © 2010 Elsevier B.V. All rights reserved.

Velazquez M.A.,Autonomous University of Campeche
Animal Reproduction Science | Year: 2011

Since the 1990s nutritional supplements including protein, fatty acids, vitamins, and minerals have been used to try and improve the superovulatory response of embryo donors in cattle. However, the accumulated information indicates that nutritional supplementation with protein, fatty acids, or minerals does not increase the number of viable embryos from superovulated cattle. Most of the evidence has shown that vitamin supplementation may increase the mean production of transferable embryos, but only in cows, as a detrimental effect on embryo viability has been reported in young heifers. Nevertheless, vitamin supplementation seems to be effective only when compared with control cows displaying a poor mean embryo production (i.e. less than four viable embryos), questioning the economical significance of such approach. Detrimental effects on embryo development have been reported in superovulated cattle supplemented with protein or fatty acids as well. New approaches to investigate the role of nutritional supplementation on superovulatory outcome in cattle are suggested in the present review. Overall, the available evidence indicates that nutritional supplementation strategies tested are not an effective approach to enhance the superovulatory outcome of well-fed cattle donors. © 2011 Elsevier B.V.

Villeger S.,CNRS Biological Evolution and Diversity Laboratory | Miranda J.R.,Autonomous University of Campeche | Hernandez D.F.,Autonomous University of Campeche | Mouillot D.,James Cook University | Mouillot D.,Montpellier University
PLoS ONE | Year: 2012

The concept of β-diversity, defined as dissimilarity among communities, has been widely used to investigate biodiversity patterns and community assembly rules. However, in ecosystems with high taxonomic β-diversity, due to marked environmental gradients, the level of functional β-diversity among communities is largely overlooked while it may reveal processes shaping community structure. Here, decomposing biodiversity indices into α (local) and γ (regional) components, we estimated taxonomic and functional β-diversity among tropical estuarine fish communities, through space and time. We found extremely low functional β-diversity values among fish communities (&1.5%) despite high dissimilarity in species composition and species dominance. Additionally, in contrast to the high α and γ taxonomic diversities, α and γ functional diversities were very close to the minimal value. These patterns were caused by two dominant functional groups which maintained a similar functional structure over space and time, despite the strong dissimilarity in taxonomic structure along environmental gradients. Our findings suggest that taxonomic and functional β-diversity deserve to be quantified simultaneously since these two facets can show contrasting patterns and the differences can in turn shed light on community assembly rules. © 2012 Villéger et al.

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