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Search Results: 1 - 10 of 179194 matches for " Guillermo E. ávila Serrano "
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Macroalgas submareales de la bahía de Todos Santos, Baja California, México Submareal macroalgae of the Todos Santos Bay, Baja California, Mexico
Raúl Aguilar-Rosas,Luis E. Aguilar-Rosas,Guillermo E. ávila Serrano,óscar González Yajimovich
Revista mexicana de biodiversidad , 2010,
Abstract: Con el fin de identificar y caracterizar la composición de especies de la zona submareal de la bahía de Todos Santos, Baja California, México; se realizaron muestreos de macroalgas marinas bentónicas en 7 sitios durante 1995-2000. Como resultado de 25 buceos Scuba entre 3 y 33 m de profundidad se encontraron 150 especies de macroalgas para el área de estudio; 10 son Chlorophyta, 26 Phaeophyta y 114 Rhodophyta. Del total, 47 son registros nuevos para el área de estudio y 2 de éstos, Faucheocolax attenuata Setchell y Minium parvum R.L. Moe, son nuevos para la flora marina del Pacífico de México. Se incluye una revisión de las investigaciones en las que se han considerado las macroalgas presentes en la bahía de Todos Santos y una discusión sobre la composición de las especies encontradas, su distribución vertical y reproducción, así como sobre las especies epífitas y parásitas del área. In order to identify and characterize the species composition of the subtidal zone of the Todos Santos Bay, Baja California, Mexico, benthic marine macroalgae were sampled at 7 sites from 1995 to 2000. As a result of 25 scuba at derds for the study area, of which Faucheocolax attenuata Setchell and R.L Moe Minium parvum are new to the marine flora of Pacific Mexico. We include a research that consider the macroalpths between 3 and 33 m we found a total of 150 species of macroalgae for the study area, of which 10 are Chlorophyta, 26 Phaeophyta and 114 Rhodophyta; 47 species represent new recogae in the Todos Santos Bay and a discussion on the composition of species found, its vertical distribution and reproduction, particularly the species epiphytes and parasites present in the study area.
Macroalgas submareales de la bahía de Todos Santos, Baja California, México
Aguilar-Rosas, Raúl;Aguilar-Rosas, Luis E.;ávila Serrano, Guillermo E.;González Yajimovich, óscar;Becerril Bobadilla, Francisco;
Revista mexicana de biodiversidad , 2010,
Abstract: in order to identify and characterize the species composition of the subtidal zone of the todos santos bay, baja california, mexico, benthic marine macroalgae were sampled at 7 sites from 1995 to 2000. as a result of 25 scuba at derds for the study area, of which faucheocolax attenuata setchell and r.l moe minium parvum are new to the marine flora of pacific mexico. we include a research that consider the macroalpths between 3 and 33 m we found a total of 150 species of macroalgae for the study area, of which 10 are chlorophyta, 26 phaeophyta and 114 rhodophyta; 47 species represent new recogae in the todos santos bay and a discussion on the composition of species found, its vertical distribution and reproduction, particularly the species epiphytes and parasites present in the study area.
Distribución y abundancia de tanatocenosis de foraminíferos bentónicos submareales en el delta del río Colorado
Santa Rosa-del Río, Miguel ángel;ávila Serrano, Guillermo Eliezer;Téllez-Duarte, Miguel Agustín;Gonzalez-Yajimovich, Oscar;Cupul Maga?a, Luis Antonio;
Boletín de la Sociedad Geológica Mexicana , 2011,
Abstract: benthonic foraminifera are important indicators of environmental conditions in coastal and marine areas since they are very sensitive to changes in their surroundings, resulting in presence and abundance of species of the thanatocoenosis communities. the objective of this work is to compare the spatial and temporal changes in the composition and structure of the benthonic-foraminifera thanatocoenosis communities of the upper gulf of california. samples were collected seasonally (summer, fall and winter of 2009, and spring of 2010) in the area between campo don abel and the southern end of isla montague. four transects of the subtidal area were run perpendicular to the baja california coastline, and a total of 56 sediment samples were taken. to differentiate the biocoenosis from thanatocoenosis, the samples were stained with rose bengal. silt and clay were eliminated by wet sieving and the 63 to 180 μm fractions retained for picking. from each sample, 300 individuals were separated, identified and their relative abundance computed to determine the dominant species. cluster analysis in q & r modes was performed on the data and the shannon-weaver diversity index calculated; dominance was obtained using simpson’s index, and a distribution map was constructed. the most abundant genera were: ammonia, cribroelphidium and rosalina; these represent preferably marine conditions, which show change in the upper gulf of california. also present were four genera of agglutinated foraminifera: ammoscalaria, reophax, anomaloides and nouria, but their distributions were centered at the southernmost stations of the study area, at the limits of the ancient estuary north of san felipe.
Mathematical modeling of the native Mexican turkey’s growth  [PDF]
E. Pérez-Lara, M. A. Camacho-Escobar, J. C. García-López, S. Machorro-Samano, N. Y. ávila-Serrano, J. Arroyo-Ledezma
Open Journal of Animal Sciences (OJAS) , 2013, DOI: 10.4236/ojas.2013.34045
Abstract: Little is known about the productive performance of Mexican turkey, so the objective of the present study was to characterize growth performance curves of backyard turkey under a confined system. Forty fertile eggs were artificially incubated and turkey weight was recorded at hatch. During growth performance weekly weight was measured until 385 days of age. Turkey commercial feed and water were offered ad libitum. To characterize growth curves, a fourth degree polynomial model regression and a Richards biological model were used, which were compared by determination coefficient (r2), to reach the best fit model. The best fit model was the fourth degree polynomial regression model from a mathematical standpoint of view. It was found that maximum tom growth was reached at 15.7 weeks with a weight gain of 259.3 g/week and in hens at 12.4 weeks with a weight gain of 112.0 g/week. Body weight reached by toms at 40 weeks was 6 kg and hens at 35 weeks with 3.6 kg.
Efectividad de un ensayo clínico sobre cuidados enfermeros para la incontinencia en mujeres
Nieto Blanco,E.; Moriano Bejar,P.; Serrano Molina,L.; Dávila álvarez,V.; Pérez Llorente,M.;
Actas Urológicas Espa?olas , 2007, DOI: 10.4321/S0210-48062007000500009
Abstract: introduction: urinary incontinence is a frequent condition in women; it is estimated that it affects between 10% and 30% of women. the most common types are stress, urgency and mixed incontinence. it is a fact that this condition affects their quality of life. objective: to assess the benefits of applying an integrated and standardized nursing intervention on women with a slight or moderate degree of stress, urge or mixed urinary incontinence. design: randomized, controlled clinical trial. location: area 6 of primary care in madrid. participants: 256 women, 128 per group. intervention: systematized care plan for the intervention group (ig) and conventional plan for the control group (cg), depending on urinary incontinence type. results: 59% of the total sample participated; 103 participants were followed: 48 from the ig (37,5%) and 55 from the cg (42,9%). the average difference in urine loss before and after intervention was 5.7 g (n = 22) for the ig, as opposed to 1.8 g (n = 27) for the cg; this reduction was not significant (p = 0.12), 95% ci [-1.09 - 8.92]. iu degree changes were assed by means of the sandvik scale and were grouped in "women that improved or cured" and "women that remained the same or got worse" after interention. 40.5% of the women in the ig improved or cured, as opposed to 21% of the women in the cg (p = 0.059). conclusions: both care plans showed their efficiency to improve ui in this group of women. the mentioned improvement was greater in the ig than in the cg, with clinically relevant differences. the fact that some of the women gave up the project during the follow-up determined a power reduction of the study.
Guía por las lindes transilvanas
Rafael Guillermo Serrano
Nómadas , 1998,
Abstract: Paul EluardRecorrer ahora el territorio dejado por Bram Stoker y su novela Drácula -a cien a os de su primera edición- resulta sin duda caminar por las alucinantes fronteras del mundo delirante del vampiro como el hijo con- sentido de la nocturnidad y de las sombras. Aunque el terreno abonado es significativo, convocamos aquí un breve merodeo en relación con el tema en la literatura y su cuota de realidad; agregamos como postre un grupo de poemas y la conseja para prevenir la visita del vampiro.
Sediment transport trends in Bahía Concepción, Baja California Sur, Mexico, based on textural parameters and heavy mineral concentrations
González-Yajimovich, Oscar;Perez-Soto, José Luis;Avila-Serrano, Guillermo E.;Meldahl, Keith;
Boletín de la Sociedad Geológica Mexicana , 2010,
Abstract: the dispersion pattern of the modern sediments of bahía concepción, baja california sur, mexico was obtained based on the spatial trends of their textural properties and heavy mineral content. the mclaren and bowles and leroux models were applied to a sediment texture data set. the mclaren and bowles method was the most appropriate for the present study due to the elongated nature of the bay and sampling design, but it was complemented by the leroux model, providing in some cases a lateral transport component. seven heavy minerals were identified and their sources were located with the aid of principal component analysis. two main sources were evident based on the spatial textural trends; one located between playa santispac and punta santa bárbara, and the other adjacent to the cadejé basin. a bi-directional transport pattern was found at the mouth of the bay with sediment being exported near the margins and imported through the deeper central portion. transport along the western margin was mostly towards the head of the bay, and towards the north along the eastern margin. in both cases the transport trends indicate a component of transport toward the deeper parts of the bay. a good agreement was found among the three methods in identifying the clastic-sediment sources and their main transport directions.
Discursos de los partidos políticos sobre el sufragio universal y la participación política en Antioquia, 1848-1854
ZAPATA áVILA,JUAN GUILLERMO;
Anuario Colombiano de Historia Social y de la Cultura , 2010,
Abstract: this article analyzes the political language of liberals and conservatives regarding universal suffrage, constitutionalism and characterization of citizenship in the mid-nineteenth century antioquia. the paper reports a research process that focused on the analysis of the press, flyers and leaflets that disseminated these speeches. the text presents the discourses that denoted the fears of party elites faced with the inclusion of the popular sectors to exercise citizenship and strong religiosity in the defense of political institutions. to this extent, exacerbated languages can be seen that promoted universal suffrage as a distinctive feature of modern society, but, in turn, as dogmatic expression of each party seeking to impose its electoral strength. the article is divided into two parts: the first analyzes liberal discourse and electoral dynamics of the period, while the second does the same with respect to the conservative party.
Discursos de los partidos políticos sobre el sufragio universal y la participación política en Antioquia, 1848-1854
Zapata ávila Juan Guillermo
Anuario Colombiano de Historia Social y de la Cultura , 2010,
Abstract: El presente artículo analiza el lenguaje político de liberales y conservadores frente a la instauración del sufragio universal, el constitucionalismo y la caracterización ciudadana a mediados del siglo xix en Antioquia. El trabajo da cuenta de un proceso de investigación que se centró en el análisis de prensa, hojas sueltas y volantes en que se divulgaban dichos discursos. El texto presenta los discursos que denotaban los temores de las élites partidistas por la inclusión de los sectores populares al ejercicio ciudadano y la fuerte religiosidad con respecto a la defensa de la institucionalidad política. En esta medida, se pueden apreciar lenguajes exacerbados que promovían el sufragio universal como elemento distintivo de la sociedad moderna, pero, a su vez, como expresión dogmática de cada partido, en procura de imponer su poderío electoral. El artículo se divide en dos partes: la primera se ocupa del análisis del discurso liberal y sus dinámicas electorales en el periodo estudiado, mientras que la segunda hace lo propio con respecto al Partido Conservador.
Hacia una forma geométrica del procesamiento de la información lógica por medio de una computadora cuántica
Manuel ávila,Guillermo Morales
Ciencia Ergo Sum , 2009,
Abstract: Hacemos una breve rese a de los orígenes de la computación cuántica e introducimos la noción de "qubit". Mencionamos algunos problemas relativos a la construcción de computadoras cuánticas y remarcamos que un problemas esencial es el de decoherencia. El enfoque geométrico para resolver ese problema se basa en variar los ángulos de inclinación de campos magnéticos aplicados sobre fotones que codifican qubits. Hemos querido hacer aquí un recuento de tipo histórico sobre el cómputo cuántico y por tanto las referencias remiten a documentos primarios en la literatura especializada.
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