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Search Results: 1 - 10 of 586562 matches for " Adrián A. Farías "
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First detection of Rio Negro virus (Venezuelan equine encephalitis complex subtype VI) in Córdoba, Argentina
Pisano, María Belén;Spinsanti, Lorena Ivana;Díaz, Luis Adrián;Farías, Adrián Alejandro;Almirón, Walter Ricardo;Ré, Viviana Elizabeth;Contigiani, Marta Silvia;
Memórias do Instituto Oswaldo Cruz , 2012, DOI: 10.1590/S0074-02762012000100017
Abstract: rio negro virus (rnv) (venezuelan equine encephalitis subtype vi) circulates only in argentina; in northern provinces, isolates have been obtained from mosquitoes and rodents since 1980 and have been associated with acute febrile illness in humans. however, no studies of rnv have been performed in the central area of the country. we carried out molecular and serological detection of rnv in córdoba, a province of the central part of the country, in mosquitoes and humans, respectively. one mosquito pool tested positive for alphavirus rna by reverse transcriptase-nested polymerase chain reaction (rt-nested pcr). subsequent sequencing determined that this alphavirus grouped with rnv. serological studies detected antibodies to rnv in one human serum sample, which was obtained during the same period that rnv was detected using the aforementioned molecular methods. this is the first report of rnv circulation in the central area of argentina, indicating an expansion of its original distribution. these results highlight the importance of strengthening surveillance procedures in endemic areas, as well as in new regions where rnv may emerge.
Estudio de la calidad sanitaria de las aguas del Delfinario de Varadero, para uso recreativo Study of the sanitary qualities of water at Varadero's Dolphinarium
Onelia María Latorre Enríquez,José Adrián Farías Ramírez,José Evaldo Guerra Báez,Amada Abad Marrero
Revista M??dica Electr?3nica , 2010,
Abstract: El Delfinario de Varadero es una de las instalaciones turísticas de nuestra provincia donde acuden grandes y chicos en busca de un sano esparcimiento; además, es muy frecuentado por los turistas extranjeros, por lo que reviste una gran importancia económica y social. En el presente trabajo se realizó una evaluación sanitaria de sus aguas, contemplado los análisis físico-químicos y bacteriológicos, en el período comprendido del a o 2007 a junio de 2009, en las cinco áreas de uso recreativo, así como de los factores que pueden incidir negativamente sobre el buen desempe o de la instalación. La media geométrica de los valores hallados de NMP coli total y NMP coli fecal se encuentra en norma. Se reportan afectaciones puntuales en el parámetro físico-químico oxígeno, disuelto en las cinco áreas muestreadas en el 25,53 % del total analizado, los valores medios de este parámetro al igual que el resto de los otros parámetros se encuentran en norma. Varadero's dolphinarium is one of our province tourist centers where people go looking for recreation; besides that, it is frequently visited by foreign tourists, having a great economic and social importance. In the present work we made a sanitary evaluation of its waters, including physic-chemical and bacteriologic analyses, in the period from 2007 to June 2009, in all the five areas of recreational usage, and also the facts that may influence negatively on the good work of the center. The geometrical media of the found NMP coli total y NMP coli faecal values are normal. There were reported punctual troubles in the physical-chemical parameter Oxygen, dissolved in the five sampled areas in 25,53 % of the total analyzed; media values of this parameter is normal, as the rest of the parameters.
Phylodynamics of Hepatitis C Virus Subtype 2c in the Province of Córdoba, Argentina
Viviana E. Ré,Andrés C. A. Culasso,Silvia Mengarelli,Adrián A. Farías,Fabián Fay,María B. Pisano,Osvaldo Elbarcha,Marta S. Contigiani,Rodolfo H. Campos
PLOS ONE , 2012, DOI: 10.1371/journal.pone.0019471
Abstract: The Hepatitis C Virus Genotype 2 subtype 2c (HCV-2c) is detected as a low prevalence subtype in many countries, except in Southern Europe and Western Africa. The current epidemiology of HCV in Argentina, a low-prevalence country, shows the expected low prevalence for this subtype. However, this subtype is the most prevalent in the central province of Córdoba. Cruz del Eje (CdE), a small rural city of this province, shows a prevalence for HCV infections of 5%, being 90% of the samples classified as HCV-2c. In other locations of Córdoba Province (OLC) with lower prevalence for HCV, HCV-2c was recorded in about 50% of the samples. The phylogenetic analysis of samples from Córdoba Province consistently conformed a monophyletic group with HCV-2c sequences from all the countries where HCV-2c has been sequenced. The phylogeographic analysis showed an overall association between geographical traits and phylogeny, being these associations significant (α = 0.05) for Italy, France, Argentina (places other than Córdoba), Martinique, CdE and OLC. The coalescence analysis for samples from CdE, OLC and France yielded a Time for the Most Common Recent Ancestor of about 140 years, whereas its demographic reconstruction showed a “lag” phase in the viral population until 1880 and then an exponential growth until 1940. These results were also obtained when each geographical area was analyzed separately, suggesting that HCV-2c came into Córdoba province during the migration process, mainly from Europe, which is compatible with the history of Argentina of the early 20th century. This also suggests that the spread of HCV-2c occurred in Europe and South America almost simultaneously, possibly as a result of the advances in medicine technology of the first half of the 20th century.
Estudio de la calidad sanitaria de las aguas del Delfinario de Varadero, para uso recreativo
Latorre Enríquez,Onelia María; Farías Ramírez,José Adrián; Guerra Báez,José Evaldo; Abad Marrero,Amada; Rodríguez Tápanes,Juan Andrés; Fleitas Bocalandro,Santiago;
Revista M??dica Electr?3nica , 2010,
Abstract: varadero's dolphinarium is one of our province tourist centers where people go looking for recreation; besides that, it is frequently visited by foreign tourists, having a great economic and social importance. in the present work we made a sanitary evaluation of its waters, including physic-chemical and bacteriologic analyses, in the period from 2007 to june 2009, in all the five areas of recreational usage, and also the facts that may influence negatively on the good work of the center. the geometrical media of the found nmp coli total y nmp coli faecal values are normal. there were reported punctual troubles in the physical-chemical parameter oxygen, dissolved in the five sampled areas in 25,53 % of the total analyzed; media values of this parameter is normal, as the rest of the parameters.
PEDAGOGíA SOCIETARIA EN EL RéGIMEN RADICAL COLOMBIANO (1863-1878): LA ENSE?ANZA DEL "BUEN SUFRAGIO" Y EL APRENDIZAJE DE LA POLíTICA MODERNA
Alzate García,Adrián;
Historia Crítica , 2010,
Abstract: this article explores the pedagogic function of a group of modern social practices that arose in the united states of colombia during the 1860s and 1870s. investigating the efforts by various political associations to form voters highlights some of the main resources used by these organizations to educate their followers in political and voting practices that abided by the principles of modern politics. although the reach of such efforts was limited, they had a significant impact on the process of political modernization in the country.
Pedagogía societaria en el régimen radical colombiano (1863-1878). La ense anza del “buen sufragio” y el aprendizaje de la política moderna.
Adrián Alzate García.
Historia Crítica , 2010,
Abstract: This article explores the pedagogic function of a group of modern social practices that arose in the United States of Colombia during the 1860s and 1870s. Investigating the efforts by various political associations to form voters highlights some of the main resources used by these organizations to educate their followers in political and voting practices that abided by the principles of modern politics. Although the reach of such efforts was limited, they had a significant impact on the pro-cess of political modernization in the country.
Fernán González.Partidos, guerras e Iglesia en la construcción del Estado nación en Colombia (1830-1900).Medellín: La Carreta Editores, 2006. 191 páginas.
Alzate García Adrián
Anuario Colombiano de Historia Social y de la Cultura , 2007,
Abstract:
A Multiparameter Colloidal Titrations for the Determination of Cationic Polyelectrolytes  [PDF]
Eduardo A. López Maldonado, Adrián O. Terán, Mercedes T. O. Guzmán
Journal of Environmental Protection (JEP) , 2012, DOI: 10.4236/jep.2012.311172
Abstract: In water treatment processes and conditioning drinking water, PEs are widely used; however, their environmental impact is still doubtful, since residual concentrations increase organic matter content and represents a potential health hazard. This paper demonstrates a multiparametric study of two colloidal titration methods: spectrophotometric and zeta potential end point detection. The first one was optimized to guarantee the accuracy of cationic commercial PE quantification. It includes the indicator dose optimization using analytical criteria for competing equilibria, a calibration curve for two ranges of CPE concentration (1 - 5 ppm and 5 - 100 ppm) and the interference study of flocculant and Sn in the CPE quantification. The second method provides a physicochemical validation of the electric surface phenomena occurring during the colloidal titration and the end point detection. As an additional contribution the zeta potential titration was discussed and proposed as an alternative method for quantifying CPE when the sample is metal free.
Functional approach to quantum friction: effective action and dissipative force
M. Belén Farías,César D. Fosco,Fernando C. Lombardo,Francisco D. Mazzitelli,Adrián E. Rubio López
Physics , 2014, DOI: 10.1103/PhysRevD.91.105020
Abstract: We study the Casimir friction due to the relative, uniform, lateral motion of two parallel semitransparent mirrors coupled to a vacuum real scalar field, $\phi$. We follow a functional approach, whereby nonlocal terms in the action for $\phi$, concentrated on the mirrors' locii, appear after functional integration of the microscopic degrees of freedom. This action for $\phi$, which incorporates the relevant properties of the mirrors, is then used as the starting point for two complementary evaluations: Firstly, we calculate the { in-out} effective action for the system, which develops an imaginary part, hence a non-vanishing probability for the decay (because of friction) of the initial vacuum state. Secondly, we evaluate another observable: the vacuum expectation value of the frictional force, using the { in-in} or Closed Time Path formalism. Explicit results are presented for zero-width mirrors and half-spaces, in a model where the microscopic degrees of freedom at the mirrors are a set of identical quantum harmonic oscillators, linearly coupled to $\phi$
The Classical Limit of the Quantum Kepler Problem  [PDF]
A. Martín-Ruiz, J. Bernal, Alejandro Frank, Adrián Carbajal-Dominguez
Journal of Modern Physics (JMP) , 2013, DOI: 10.4236/jmp.2013.46112
Abstract:

The classical limit of the quantum mechanical Kepler problem is derived by using a simple mathematical procedure recently proposed. The method is based both on Bohr’s correspondence principle and the local averages of the quantum probability distribution. We illustrate in a clear fashion the difference between Planck’s limit and Bohr’s correspondence principle. We discuss the confinement effect in macroscopic systems.

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