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Search Results: 1 - 10 of 21200 matches for " Dolores Pereira "
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Sex-Dependent Effects of Prenatal Stress on Learned Helplessness and Anxiety-Related Behaviours in Wistar Rats  [PDF]
Inês Pereira-Figueiredo, Consuelo Sancho, Juan Carro, Dolores E. López, Ricardo Gómez-Nieto, Orlando Castellano
Journal of Behavioral and Brain Science (JBBS) , 2015, DOI: 10.4236/jbbs.2015.57026
Abstract: There has been an increasing importance of studies that link sex to stress coping processes. Recently, we reported that male and female Wistar rats responded differently to prenatal stress (PS) under basal conditions. The aim of the present study was to determine the influence of sex on behaviour and coping strategies, as an effect of gestational adversity in rats that were exposed to an uncontrollable stressor. Once the animals reached adulthood, the offspring from stressed/non-stressed dams were subjected or not to antidepressant treatment with Sertraline. After that, they were exposed to a single inescapable shock (IS) session, in which the rats were further tested for escape behaviour along 10 days, as a model of learned helplessness (LH). In prenatally stressed animals after the IS, behavioural differences appeared in a sex specific manner. Males proved to be more susceptible to the adverse context than females, exhibiting behavioural despair in a large percentage of the cases. Surprisingly, PS did not affect shock escape failure, but did affect learning performance in a sex dependent manner. In females, PS led them to learn to avoid shocks, learning better than controls, and by contrast, PS males did not learn to avoid shocks and displayed some signs of anhedonia. Sertraline did not help animals to avoid shocks, but helped them to escape from it. Our data indicate the existence of sex dependent behavioural differences in PS animals when facing an uncontrollable stress situation, in which the changes induced by PS were not only different, but opposite between sexes.
Verde Macael: A Serpentinite Wrongly Referred to as a Marble
Rafael Navarro,Dolores Pereira,Ana Gimeno,Santiago del Barrio
Geosciences , 2013, DOI: 10.3390/geosciences3010102
Abstract: Serpentinites are used in both exterior and interior locations, but not all serpentinites are equal: they vary in physical-mechanical behavior and are not all suitable for similar uses. The serpentinites most commonly used worldwide come from India, Pakistan or Egypt. Spain has traditionally quarried two ultramafic massifs, one in Galicia (Verde Pirineos) and one in Andalucía (Verde Macael). Some of these quarries were small family-run businesses. In both cases, these rocks are commercially available as “green marble.” These serpentinites commonly have a high degree of carbonation, but the process does not always take place with the same intensity. Carbonate can act as a cementing agent of the other phases, increasing the mechanical strength parameters. As a result, an improvement in the strength conditions is achieved, but a misinterpretation of the suitability of the rock may occur because a perception among users that “green marble” is similar to geologically defined marble. This may lead to inappropriate applications as an ornamental stone. At a time of economic crisis in Europe, the natural stone sector is encouraged to invest in research to identify the best quality products that can compete profitably with those currently being imported from other countries. This paper provides a comparison of properties of the Verde Macael serpentinite with a true marble in the hope of contributing to improving the natural stone industrial sector.
Green Environment: Decision-Making and Power Utility Optimization towards Smart-Grid Options  [PDF]
Dolores DeGroff
Smart Grid and Renewable Energy (SGRE) , 2010, DOI: 10.4236/sgre.2010.11005
Abstract: Decision-making toward prudent energy conservation is a primary issue in the power utility management while con-ceiving green environment. Presented in this paper are relevant considerations and prudent ways of decision-making thereof. Examples are furnished to illustrate the underlying considerations and are discussed using practical examples. Specifically green ambient is considered and the underlying payoff resulting from each combination of strategies adopted (or courses of action taken) by the technology-option participants is evaluated. Game-theoretic pursuits are followed.
Sex Differences in the Effects of Sertraline and Stressors in Rats Previously Exposed to Restraint Stress  [PDF]
Inês Pereira-Figueiredo, Juan Carro, Luis J. Mu?oz, Consuelo Sancho, Orlando Castellano, Ricardo Gómez-Nieto, Dolores E. López
Journal of Biomedical Science and Engineering (JBiSE) , 2015, DOI: 10.4236/jbise.2015.87038
Abstract: The serotonergic system in the brain plays a major role in mood and anxiety regulation when exposed to stress. The aim of the present study was to evaluate the effects of Sertraline administration in coping with stress using the behavioural paradigms of the acoustic startle reflex (ASR) and its prepulse inhibition (PPI) in both sexes. Wistar rats were divided into two groups: intact animals and exposed to restraint stress (RS) 3 times per day during 7 days, which were then subdivided into three other groups: injected with Sertraline (5 mg/kg/day) or the drug vehicle saline for 8 consecutive days, and non-injected. ASR and PPI values were analyzed along 4 sessions to determine behavioral changes. Upon it, we also determine the effects of acute immobilization stress analyzing physiological stress indicators in blood. Our data show sex differences in response to stress paradigms. RS affected more intensely males than females, disturbing the males’ growth and the long-term startle habituation that were not affected in females. PPI increased in the vehicle-injected animals when compared to baseline in both sexes, and Sertraline reversed more efficiently it in females. Moreover, despite both sexes exposed to stressful paradigms exhibited a significant increase in serum glutamic-oxaloacetic transaminase and lactate dehydrogenase enzymes when compared with intact controls, as well as leucopenia, some differences according to sex were found in the haemostatic response to stress. Notably, the repeated injections procedure disturbed the early response to stress, which Sertraline only attenuated in both sexes. Our data suggest that 8-day Sertraline administration is effective in reversing stress-induced changes in some physio-logical parameters, but insufficient to return immunological values to normality.
Pereira Dávalos,Concepción; Urbizo Vélez,Joaquín; Mori Estévez,Ana Dolores;
Revista Habanera de Ciencias M??dicas , 2008,
Abstract: the so called gorlin’s syndrome is a rare infrequent clinical pathological disorder with a well known and multi expression hereditary autosomic dominant characteristic pattern. the syndrome is characterized by multiple nodules in non exposed skin and facial skin which tend to become malignant with age (basal cell moles), multiple odontogenic keratocysts, and hypertelorism, a wide nose base among others. our main purpose is to update the subject as well as to present the case diagnosed as a gorlin’s syndrome in the plastic surgery department of calixtogarciahospital.
Concepción Pereira Dávalos,Joaquín Urbizo Vélez,Ana Dolores Mori Estévez
Revista Habanera de Ciencias M??dicas , 2008,
Abstract: El llamado Síndrome de Gorlin es un raroy poco frecuente desorden clínico-patológico hereditario de carácter autosómico dominante bien reconocido y expresión variable. El Síndrome se caracteriza por múltiples nódulos cutáneos en piel no expuesta al sol y también en la piel de cara que tienden a volverse malignos con la edad (nevos de células basales), queratoquistes odontogénicos múltiples, hipertelorismo, amplia raíz nasal entre otras. 1, 2 Nos trazamos como objetivo, actualizar el tema, así como presentar un caso diagnosticado como síndrome de Gorlin, en el departamento de Cirugía Máxilofacial del Hospital General Calixto García. The so called Gorlin’s Syndrome is a rare infrequent clinical pathological disorder with a well known and multi expression hereditary autosomic dominant characteristic pattern. The syndrome is characterized by multiple nodules in non exposed skin and facial skin which tend to become malignant with age (basal cell moles), multiple odontogenic keratocysts, and hypertelorism, a wide nose base among others. Our main purpose is to update the subject as well as to present the case diagnosed as a Gorlin’s Syndrome in the plastic surgery department of CalixtoGarciaHospital.
Efeito da fertiliza??o com fósforo, potássio e magnésio em jacatupé infectado com rizóbio em um Latossolo álico
Stamford, Newton Pereira;Santos, Carolina Etiene de Rosália e Silva;Medeiros, Rui;Freitas, Ana Dolores Santiago de;
Pesquisa Agropecuária Brasileira , 1999, DOI: 10.1590/S0100-204X1999001000009
Abstract: in order to evaluate the effects of phosphorus, potassium and magnesium application on the nutrient absorption and yield of yam bean (pachyrhizus erosus (l.) urban), in a yellow latosol of the zona da mata of pernambuco state, brazil, an experiment was carried out using the strain of bradyrhizobium sp. nfb 450, isolated from yam bean and selected for efficient n2 fixation in previous experiments. potassium and magnesium were applied in the proportion of 2:1 (k2o:mgo) in increasing levels (0:0, 40:20, 60:30 and 80:40 kg ha-1 of k2o and mgo, respectively), and crescent levels of phosphorus (0, 20, 40, 60 and 80 kg ha-1 of p2o5) were added in the form of triple superphosphate. maximum dry matter production, total n and total p accumulated were obtained when applying 64 kg ha-1 of p2o5. a significant effect of k2o:mgo levels was observed in relation to the treatment without k and mg application; nevertheless, higher levels of k2o:mgo decreased dry matter and total n, and increased total p accumulation. yam bean responded to low levels of p, k and mg fertilizer, and showed ability in n2 fixation, with great potential for biomass production.
Diagnósticos de enfermagem de pacientes em unidades de terapia intensiva
Pasini, Dolores;Alvim, Iracema;Kanda, Luiza;Mendes, Rita do Socorro Pereira;Cruz, Diná de Almeida Lopes Monteiro da;
Revista da Escola de Enfermagem da USP , 1996, DOI: 10.1590/S0080-62341996000300011
Abstract: the aim of this study was to identify the nursing care needs of patients of critical care unit. the nursing diagnoses of 32 patients was formulated. the data was collected by interview and physical examination and the functional health patterns was the framework to collect the data and to identify the predominant dysfunctional health areas.
Julieta López Zamora,María Dolores Morín Lara,Citlalli Sánchez Hernández,María Virginia Bon Pereira
Revista Perspectivas de la Comunicación , 2008,
Abstract: Este trabajo retoma una investigación realizada en el 2006 con la finalidad de analizar el consumo televisivo y mediático de zonas rurales y suburbanas del sur del Estado de Nuevo León, México. En este artículo se analiza la demanda social que las poblaciones rurales hacen del medio de comunicación estatal. Se retoman las experiencias de consumo mediático para analizarlas bajo el enfoque teórico de Estudios Culturales.La metodología del trabajo base, fue de tipo cualitativo y mediante entrevistas focalizadas y sondeos de opinión.Se concluye que las audiencias realizan el consumo mediático a partir de sus necesidades y de acuerdo a factores sociales, culturales y económicos que conforman las identidades individuales y sociales. Desde el punto de vista de los medios estatales, éstos pueden contribuir a fomentar un canal de comunicación con sus audiencias, a fin de identificar no solo preferencias en las audiencias, sino también necesidades de consumo y participación en los medios de comunicación.
Métodos híbridos de investigación y dirección de empresas: ventajas e implicaciones
José Francisco Molina Azorín,María Dolores López Gamero,Jorge Pereira Moliner,Eva María Pertusa Ortega
Cuadernos de Economía y Dirección de la Empresa , 2012,
Abstract: La metodología híbrida de investigación, es decir, la combinación de métodos cuantitativos y cualitativos en el mismo trabajo, es una aproximación muy utilizada en varios campos, por ejemplo en educación y en sociología. Sin embargo, la atención dedicada a la aplicación y a los beneficios de los métodos híbridos en dirección de empresas es muy baja con relación a otras áreas. El propósito de este trabajo es describir las características principales de esta aproximación metodológica (principalmente los tipos de dise nos, propósitos y ventajas), contribuyendo a su difusión entre los investigadores en dirección de empresas. Además, se ha llevado a cabo una revisión de la literatura sobre el uso de los métodos híbridos en la revista Cuadernos de Economía y Dirección de la Empresa (CEDE), examinando el peso de los artículos híbridos y sus principales características.
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