Gonzalez J.V.,National University of Cuyo |
Barboza A.G.,Hospital Central Of Mendoza |
Barboza A.G.,University of Aconcagua |
Vazquez F.J.,Hospital Italiano Of Buenos Aires |
And 2 more authors.
PloS one | Year: 2016
OBJECTIVES: To compare the prevalence of prothrombin G20210A in patients with objectively confirmed cerebral vein or cortical vein thrombosis against healthy controls, and evaluate geographical variations.DESIGN: Systematic review and meta-analysis of case control studies.METHODS: We conducted a systematic review of electronic databases including MEDLINE and EMBASE. The main outcome was the prevalence of prothrombin G20210A in patients with objectively confirmed cerebral vein or cortical vein thrombosis; we also analyzed individual country variations in the prevalence. The random-effects model OR was used as the primary outcome measure.RESULTS: In total 19 studies evaluated 868 cases of cerebral venous thrombosis and 3981 controls. Prothrombin G20210A was found in 103/868 of the patients with cerebral venous thrombosis and 105/3999 of the healthy controls [random effects pooled OR 5.838, 95% CI 3.96 to 8.58; I217.9%]. The prevalence of prothrombin G20210A was significantly elevated in Italian studies (OR 9.69), in Brazilian studies (OR 7.02), and in German studies (OR 3.77), but not in Iranian studies (OR 0.98).CONCLUSION: Prothrombin G20210A is significantly associated with cerebral venous thrombosis when compared to healthy controls, although this association is highly dependent on the country of origin.
Changes in plant functional diversity and decomposition rate under different silvopastoral use intensities in northwest patagonia, Argentina [Cambios en la diversidad funcional del sotobosque y la tasa de descomposición frente a diferentes intensidades de uso silvopastoril en el noroeste de la Patagonia, Argentina]
Sepulveda J.E.A.,University of Aconcagua |
Chillo V.,National University of Rio Negro
Ecologia Austral | Year: 2017
Functional diversity loss by human land-use changes is of great importance for achieving sustainable management, as it plays a key role in ecosystem functioning through a direct influence over ecological processes. In northwest Patagonian forests, livestock production is among the main activities affecting natural ecosystems. The aim of the study was to characterize changes in functional diversity of understory vegetation in sites with different silvopastoral use intensity, and the effects that these variations may have on rate of litter decomposition in mixed forests of cypress and coihue of southwest Río Negro Province, Argentina. Changes in plant functional traits (life cycle, life style, architecture, habitat, leaf size, leaf texture and root system) were characterized, and the decomposition rate of each site’s litter was quantified. Our results showed that both functional diversity index (FDQ) and decomposition rate were higher under high silvopastoral use intensity, but the relationship was not significant. Results also showed that certain plant functional traits (i.e., rosette architecture, prostrate habitat and fern life form) have a significant effect on litter lost weight. Under high silvopastoral use intensity, the relative proportion of species with rosette architecture and prostrate habitat increases, which led to an increase in decomposition rate. This indicates that silvopastoral activity may modify the original community composition towards species with a rapid resource acquisition, altering also nutrient cycling. In this sense, ecosystem functioning seems to be influenced by certain functional traits, rather than functional diversity itself. © 2017, Asociacion Argentina de Ecologia. All rights reserved.
de los Paramo M.A.,University of Aconcagua
Revista Argentina de Clinica Psicologica | Year: 2011
The principal objective of this study is to analyze the meanings of the adolescence, psychologist profile and psychotherapy for adolescents, trough focal groups with adolescents (15-20 years old, both genders), parents, teachers, and psychologists. The methodology was of qualitative nature, with a narrative design. The sampling methods were deliberately no probabilistic. The analysis of the textual data was made through the Content Analysis technique. The discussion was considered in terms of adolescence and psychotherapy. © 2011 Fundación AIGLÉ.
de los Angeles Paramo M.,University of Aconcagua
Terapia Psicologica | Year: 2011
In this study, the risk and protective factors in adolescence were analized. The methodology was of qualitative nature, with a narrative design. The sampling methods were deliberately no probabilistic. The information was obtained through discussion groups with adolescents, parents, teachers, and psychologists. The analysis of the data was made through the Content Analysis technique. The discussion was considered in terms of adolescence and factors of risk and protection. © 2011 Sociedad Chilena de Psicología Clínica.
Saez Lancellotti T.E.,National University of Cuyo |
Saez Lancellotti T.E.,University of Aconcagua |
Boarelli P.V.,National University of Cuyo |
Monclus M.A.,National University of Cuyo |
And 8 more authors.
PLoS ONE | Year: 2010
Hypercholesterolemia represents a high risk factor for frequent diseases and it has also been associated with poor semen quality that may lead to male infertility. The aim of this study was to analyze semen and sperm function in diet-induced hypercholesterolemic rabbits. Twelve adult White New Zealand male rabbits were fed ad libitum a control diet or a diet supplemented with 0.05% cholesterol. Rabbits under cholesterol-enriched diet significantly increased total cholesterol level in the serum. Semen examination revealed a significant reduction in semen volume and sperm motility in hypercholesterolemic rabbits (HCR). Sperm cell morphology was seriously affected, displaying primarily a ''folded head''- head fold along the major axe-, and the presence of cytoplasmic droplet on sperm flagellum. Cholesterol was particularly increased in acrosomal region when detected by filipin probe. The rise in cholesterol concentration in sperm cells was determined quantitatively by Gas chromatographic-mass spectrometric analyses. We also found a reduction of protein tyrosine phosphorylation in sperm incubated under capacitating conditions from HCR. Interestingly, the addition of Protein Kinase A pathway activators -dibutyryl-cyclic AMP and iso-butylmethylxanthine- to the medium restored sperm capacitation. Finally, it was also reported a significant decrease in the percentage of reacted sperm in the presence of progesterone. In conclusion, our data showed that diet-induced hypercholesterolemia adversely affects semen quality and sperm motility, capacitation and acrosomal reaction in rabbits; probably due to an increase in cellular cholesterol content that alters membrane related events. © 2010 Saez Lancellotti et al.
Navarro D.,University of Aconcagua
Cuadernos de Turismo | Year: 2015
Based on available definitions of tourist resources and tourist attractions, several coincidences, excesses and omissions are identified: The functional variable and the conversion state define the difference between resources and attractions. Then, two classifications are proposed for both categories: resources (considering system approaches and UNESCO typology) and attractions (attending the assessment of its resources andrepresentations as well as the capacity or necessity of being managed). Moreover, assessment tools are propounded for both study objects in view of remarkable characteristics (for resources) and actions taken (for attractions).
Sassi P.L.,CONICET |
Taraborelli P.,CONICET |
Albanese S.,CONICET |
Gutierrez A.,University of Aconcagua
Ethology | Year: 2015
The activity rhythm of a species is ruled by internal signals as well as external factors. Among them, ambient temperature strongly influences the amount, duration, and distribution of an organism's activities throughout the day. The result is a pattern of activity that, between certain limits, can be flexible to deal with seasonal and spatial thermal heterogeneity. The range of behavioral plasticity increases with environmental variability and could be beneficial for a species' persistence under novel conditions. Thus, the goal of this study was to experimentally explore the behavioral plasticity in Phyllotis xanthopygus, a rodent species inhabiting an altitudinal gradient in the Central Andes Mountains of Argentina. In the laboratory, we assessed activity rate and pattern under different temperatures by comparing groups of individuals collected at different altitudes. All animals were acclimated to subsequent thermal treatments in a paired design. As expected, P. xanthophygus showed changes in activity under different temperatures, and animals from diverse altitudes were differently affected. In particular, animals from mid-altitudes and high altitudes reduced their activity under high temperatures. Intraspecific differences across the altitudinal gradient suggest that animals from mid-altitudes and high altitudes are less heat tolerant than those from lower sites, in spite of acclimation to equal conditions. We propose that climate ranges experienced in the field possibly promote this different response. Our results are discussed in light of recent forecasts of temperature rises in the region, which could constrain P. xanthophygus activity in space and time. © 2015 Blackwell Verlag GmbH.
Bordonaro O.L.,Centro Cientifico Tecnologico |
Pratt B.R.,University of Saskatchewan |
Robledo V.,University of Aconcagua
Geological Journal | Year: 2013
The ptychoparioid trilobite Blainia gregaria Walcott, 1916 is described for the first time from the late middle Cambrian (Series 3) of the Argentine Precordillera. It occurs commonly in the upper part of La Laja Formation, a carbonate platform succession that crops out in the Precordillera Oriental of San Juan where it reaches a thickness of some 600m. Sections were sampled on cerro Tres Marías in Sierra de Marquesado and in quebrada de Zonda at the northern termination of Sierra Chica de Zonda. More than 1200 specimens were recovered from 22 stratigraphic levels over a thickness of 155m, located in the uppermost 15m of the Soldano Member, the approximately 100m thick Rivadavia Member, and in the lower 40m of the Juan Pobre Member. Our biometric study dealt with 205 cranidia and 365 pygidia from cerro Tres Marías. Measured dimensions of a subset of this collection provide bivariate datasets that in some characters show broad scatter plots and relatively low linear correlation coefficients, indicative of rather wide intraspecific morphological variation. Six morphotypes (three cranidial and three pygidial), recognized mainly on the basis of shape, occur together in the same collections. This evidence for an unusually high degree of variability leads to a proposed synonymy of some 30 previously named species in North America belonging to two genera, Blainia Walcott, 1916 and Glyphaspis Poulsen, 1927, the latter considered a junior synonym. The biogeographic distribution of B. gregaria, as redefined here, shows that it was an endemic Laurentian species that inhabited the inner parts of the carbonate platform that rimmed the craton and mantled portions of its interior. Its presence in western Argentina is further evidence for the very close faunal relationship between the Precordilleran terrane, known as Cuyania, and Laurentia during the Cambrian. © 2012 John Wiley & Sons, Ltd.
Gomez E.E.,University of Aconcagua
Acta Colombiana de Psicologia | Year: 2012
In the present paper, the concept of incommensurability is analyzed in the light of what is happening in different disciplines related to psychology. it is detected that there are many concepts that are applied in different studies without a conceptual elaboration or re-elaboration from new attributes identified in a certain phenomenon. Sometimes it consists of merely adding together many terms; in other cases, concepts are transferred without specifying the ontology or taxonomy of which they are part. two theoretical works are described - one by castorina and the other one by Bruner - to exemplify the arguments expressed. Finally, it is argued that a certain margin of common space would exist between psychological theories, which could be represented, for example, in the resolution of "problems" (both theoretical and empirical). that is to say, a theory is valid while it is questionned by an important sector of the scientific community (mainly for research and secondarily for professional practice).
PubMed | National University of Cuyo and University of Aconcagua
Type: Journal Article | Journal: CoDAS | Year: 2016
Using a pretest and posttest comparison group design, this 20 weeks study investigated the effects of a phonological awareness training program (PATP) on attention efficiency (AE) in 57 children (age = 5 to 6 years) at risk. The experimental group received the PATP (EG; n=30). We obtained pretest and posttest measures of phonological awareness and AE. The ANOVA showed significant interaction effects of the PATP and time on phonological awareness and AE. For both groups, posttest AE score means were higher than pretest score means. Pretest measures showed that the AE score mean for the EG was lower than that for the Control Group (CG; n=31); whereas posttest data showed no between group differences. Contrast analysis showed that the EG gained a greater level of phonological awareness ability and AE over CG. Our results indicate that childrens attention efficiency not only improved as they developed, but also increased by means of a PATP.