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Search Results: 1 - 10 of 466695 matches for " MARíA LOUREIRO GARCíA "
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POLíTICAS CONTRA EL CAMBIO CLIMáTICO Y PREFERENCIAS SOCIALES EN GALICIA Y ESPA A
FERNANDO DOMíNGUEZ ARCOS,XAVIER LABANDEIRA VILLOT,MARíA LOUREIRO GARCíA
Revista Galega de Economía , 2011,
Abstract: Este trabajo recoge los principales resultados de un estudio realizado para obtener la disponibilidad a pagar y las actitudes de las familias gallegas y espa olas ante diversas alternativas de políticas de mitigación de los efectos del cambio climático. En el artículo se demuestra que las sociedades espa ola y gallega consideran el cambio climático como un problema relevante y que ha de afrontarse. La disponibilidad a pagar por un programa eléctrico que destine los recursos a la promoción de tecnologías no carbónicas es relativamente elevada y demuestra que las familias gallegas y espa olas serían favorables a la aplicación de políticas de precios contra las emisiones de gases de efecto invernadero en determinadas circunstancias.
ESTUDIO DE LA INCIDENCIA DE LOS INCENDIOS EN GALICIA: UNA PERSPECTIVA SOCIOECONóMICA
JESúS BARREAL PERNAS,MARíA LOUREIRO GARCíA,JUAN PICOS MARTíN
Revista Galega de Economía , 2011,
Abstract: Muchos trabajos relacionan la acción del fuego con las aptitudes físicas o meteorológicas de la zona, pero no inciden en aquellos condicionantes de tipo socioeconómicos que afectan a la ocurrencia de incendios. A raíz de este hueco en la literatura, este trabajo analiza el impacto de variables socioeconómicas que afectan a la propagación de los incendios como son, por ejemplo, la estructura poblacional o los usos agrícolas y ganaderos. Para ello, se emplea una regresión lineal a partir de datos municipales, corrigiendo los errores estándar de los coeficientes por la heterogeneidad de cada municipio en Galicia, junto con una regresión Poisson. Entre los resultados obtenidos más relevantes destaca la importancia del papel de la densidad poblacional, junto con los diferentes usos agrarios y ganaderos de la tierra, así como la importancia de la efectividad de la organización geográfica de las medidas contra los incendios, así como las dotaciones económicas destinadas a los servicios preventivos.
Rese a de "Seminario Científico Internacional Efectos económicos, sociais e ambientais da marea negra do Prestige " de Albino Prada Blanco y María Xosé Vázquez Rodríguez [coord.]
María L. Loureiro
Revista Galega de Economía , 2004,
Abstract:
Unusual presentation of hepatitis B serological markers in an Amerindian community of Venezuela with a majority of occult cases
Nathalia E Cardona, Carmen L Loureiro, Domingo J Garzaro, María C Duarte, Daisy M García, Milian C Pacheco, Isabelle Chemin, Flor H Pujol
Virology Journal , 2011, DOI: 10.1186/1743-422x-8-527
Abstract: Of 150 sera, with 17% anti-HBc and 1.3% HBsAg prevalence, 70 were tested for the presence of HBV DNA. From these, 25 (36%) were found positive for HBV DNA by PCR in the core region. Two of these 25 sera were HBsAg positive, indicating an overt infection. Of the remaining 68 sera tested, 23 exhibited OBI. Of these, 13 were HBV DNA out of 25 anti-HBc positive (52%) and 10 HBV DNA positive, out of 43 anti-HBc negative (23%), with a statistical significance of p = 0.03. Viral DNA and HBsAg were present intermittently in follow up sera of 13 individuals. Sequence analysis in the core region of the amplified DNA products showed that all the strains belonged to HBV genotype F3. The OBI isolates displayed 96-100% nucleotide identity between them. One isolate exhibited the co-circulation of a wild type variant with a variant with a premature stop codon at the core protein, and a variant exhibiting a deletion of 28 amino acids.The frequency of OBI found in this Amerindian group warrants further studies in other communities exhibiting different degrees of HBV exposure.Hepatitis B virus (HBV) infection is a significant health concern among Amerindians in the Americas with high exposure being documented in several Amerindian groups [1]. However, the prevalence of active HBV infection, defined as positivity for HBV surface antigen (HBsAg) is variable among different Amerindian communities, coexisting in the same geographic environment [2]. In a recent study in the Venezuelan Amazon, anti-HBc prevalence ranged from 17 to 70% [2].Occult hepatitis B virus infection (OBI) is characterized by the presence of hepatitis B virus (HBV) DNA in the absence of HBV surface antigen (HBsAg) [3,4]. OBI can lead to severe chronic manifestations including hepatocellular carcinoma (HCC) [5,6]. OBI has not been studied thoroughly in Amerindian populations and could be present in Amerindian populations exhibiting evidence of exposure to HBV without high prevalence of active infection. Indeed, OBI has
Desempe?o de estuches comerciales para el diagnóstico serológico de las hepatitis virales B y C en poblaciones yanomami y piaroa del estado Amazonas
Cardona,Nathalia Elena; González,Kenia del Valle; Garzaro,Domingo José; Loureiro,Carmen Luisa; Duarte,María Carolina; García,Daicy Mayila; Pacheco,Milian Coromoto; Pujol,Flor Helene;
Revista de la Sociedad Venezolana de Microbiología , 2010,
Abstract: hepatitis viruses are an important morbility and mortality cause in the amazon basin. the goal of this study was to evaluate the performance of commercial serologic kits for determination of hvb and hvc markers in indigenous populations. presence of anti-hbc, hbags, anti-hvc and viral genomes was determined in sera from piaroa and yanomami individuals. over 50% of the samples reactive with one of the commercial kits were not positive when using other kits. the serologic marker which showed the highest concordance among the commercial kits was anti-hbc, possibly because it is an inhibition assay. concordance among assays for hbags and pcr positivity varied between poor and moderate; only two of the tests coincided with the pcr results. there was no concordance among the various immunoenzymatic assays, nor in viral rna presence for hvc. the unexpected discrepancies among the various commercial kits could be due to inherent characteristics of these populations such as multiple co-infections, especially parasitic. these factors could be affecting the specificity of the diagnostic kits, situation less frequently observed in other venezuelan populations. this study emphasizes the importance of validating serologic tests in these populations, through confirmation and molecular assays.
Can Character Solve Our Problems? Character Qualities and the Imagination Age  [PDF]
María García Alvarez
Creative Education (CE) , 2018, DOI: 10.4236/ce.2018.92012
Abstract: The emergence of new technology, incorporation of AI to the work floor and rapid pace of change and complexity around us, contribute to the need for a more sophisticated set of skills as key elements for the 21st century and centuries to come. This paper defends the idea that in the Imagination Age we will require more than just the mastery of traditional foundational literacies. Educational institutions should shift the focus towards the training of character qualities. Meta-competencies directly linked with character will provide students with the ability to deal with complex environments. While the importance of character qualities in education is not new, it will become more relevant to prepare the future generations. Educational institutions are urged to rethink their own methods and roles to prepare students to live and collaborate together with new forms of intelligence.
Reproductive behavior in the annual fish Austrolebias reicherti Loureiro & García 2004 (Cyprinodontiformes: Rivulidae)
García, Daniel;Loureiro, Marcelo;Tassino, Bettina;
Neotropical Ichthyology , 2008, DOI: 10.1590/S1679-62252008000200012
Abstract: annual fishes inhabit temporary ponds that dry out seasonally and the adaptations to survive this extreme condition include high metabolic rates and an elaborate courtship behavior which ends in the deposition of drought-resistant eggs, capable of going through diapause stages in the substrate. the pronounced sexual dimorphism that these fishes show suggests that sexual selection could play a key role in the differentiation, speciation and evolution of this diverse group of fishes. however, there is scarce information about their reproductive isolation mechanisms, including detailed analysis of courtship signals. herein, we analyzed, qualitatively and quantitatively, the reproductive behavior of austrolebias reicherti. the behavioral units recognized in this study correspond with the previous analysis of other species of annual fishes. the most frequent unit in males was the lateral display where specific morphological and coloration patterns are displayed to the female. the female's high relative frequency and time of quietness suggest that this unit may have an evaluation role during courtship. in addition to visual displays during courtship, males perform vibrations of the dorsal and anal fins as well as body undulations; these indicate that mechanical signals may be important for attracting females. our results support the hypothesis of multimodal signals. the conservation of behavioral patterns in courtship displays within austrolebias suggests that species-level recognition and the barrier to hybridization may not occur at this stage, unless quantitative differences can be identified.
Purification, Immobilization and Characterization of Lipase Isoenzyme from Aspergillus niger with C8 Magnetic Particles  [PDF]
Samanta Hernández-García, María Inmaculada García-García, Francisco García-Carmona
Advances in Bioscience and Biotechnology (ABB) , 2014, DOI: 10.4236/abb.2014.57075
Abstract:

The purification of a lipase isoenzyme from an Aspergillus niger lipase A is reported in this manuscript. Purification was carried out in a simple adsorption step, in which the lipase was offered at low ionic strength to the commercially available C8 modified magnetic particles, MaKProt C8. When the isoenzyme was desorbed with a 0.2% solution of Triton X-100, the SDS-PAGE gel showed a single pure band with a molecular weight of 35 KDa. The purified fraction showed 66.75-fold purification compared with the crude extract. The pure fraction was characterized along with the crude extract and the lipase adsorbed on the MaKProt C8. The purified and the adsorbed lipase showed better activity for the tested substrates (p-nitrophenyl acetate, decanoate, myristate and palmitate) than the crude extract, the preferred substrates being myristate (26.7 μmol·min-1·mg-1) and decanoate (17.4 μmol·min-1·mg-1), respectively. The temperature and pH profiles showed no change for the three enzymes, the optimum temperature being 37°C and the best pH 7.0.

Quality and Technological Properties of Gluten-Free Biscuits Made with Pachyrhizus ahipa Flour as a Novel Ingredient  [PDF]
María Cecilia Doporto, Fernanda Sacco, Sonia Z. Vi?a, María Alejandra García
Food and Nutrition Sciences (FNS) , 2017, DOI: 10.4236/fns.2017.81005
Abstract: The development of gluten-free foodstuffs with high nutritional quality components is an important objective to achieve. Pachyrhizus ahipa is one of the few leguminous species that produce edible tuberous roots with high nutritional value. Thus, the aim of this work was to formulate biscuits containing corn starch and 125 - 350 g·kg-1 of P. ahipa flour (AF) and to study the main physicochemical properties related to their nutritional and technological quality as well as their sensory acceptability. The formulation containing 250 g of AF kg-1 was selected for improving the product nutritional quality (i.e. higher protein content) without an extensive modification of textural properties. A formulation replacing corn starch by cassava flour (250 g·kg-1) was also analyzed. In this case, ahipa and cassava biscuits showed maximum force and energy required to bite twice and three times higher than the control, respectively. Slight variations were observed in color (E and browning index). The overall acceptability of biscuits formulated with both flours was better scored than the control by a sensory panel. Principal component analysis allowed to relate quality attributes, chemical composition, and sensory characteristics of biscuits containing cassava or ahipa flours. The results indicated that ahipa flour could satisfactorily substitute part of the corn starch used in the formulations of gluten-free biscuits.
Evaluation of a Teaching Sequence Regarding Science, Technology and Society Values in Higher Education  [PDF]
María Amparo Oliveros, Alejandra García, Benjamín Valdez
Creative Education (CE) , 2015, DOI: 10.4236/ce.2015.616179
Abstract: This work shows the results of a teaching-learning sequence applied to the concept of the nature of science and technology implemented on manufacturing technology engineering students at Autonomous University of Baja California, Mexico, during the academic period 2012-2013. The sequence was implemented to the course of Applied Human Values, on which students ponder and debate on principles of science and technology; taking as main objective to identity student beliefs on ethics, and values and assumptions of science. The Methodological design is quasi-experimental, pre-post-test without controlling group. The study allows identifying a slight improvement in the engineering student beliefs about the aspects of science, technology and society that are being evaluated.
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