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Search Results: 1 - 10 of 36936 matches for " Hernández Valenzuela "
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Sodium-potassium balance in the regulation of high blood pressure
Luis Hernán Zárate Méndez,Alex Valenzuela Montero
Medwave , 2012,
Abstract: The World Health Organization considers essential hypertension as a primary cause of death. Twenty-five percent of the population over 15 has high blood pressure (HBP), equivalent to a billion people. It has been predicted that this group will increase by 60%, lineal with age increase in the overall population. Unfortunately, detection, treatment and effective control of HBP, are deficient both in Chile and in the rest of the world, making it an unresolved health problem demanding urgent attention. The recently conducted Chilean National Health Survey (2009-2010) revealed a 26.9% prevalence of this condition in the population, sixty-five percent of individuals are aware of their condition, 37.6% are in treatment and only 16,49% are effectively controlled. Furthermore, the survey reveals unhealthy life-style markers, which explains the epidemic that besets the country as there are multiple risk factors at stake. This review focuses mainly on the importance of the sodium-potassium relationship in the regulation of high blood pressure. It must be pointed out that all of the studies underscore the importance of sodium in the genesis of hypertension because of its effects of blood pressure, especially in sensitive individuals, while little attention has been given to the manifold beneficial actions of potassium in the regulation of blood pressure.
Profundidad del Músculo Masetero Medido Mediante Ultrasonido, según índice Facial en Relación al Sexo
Hernández Caldera,Arnoldo; Frugone Zambra,Raúl; Valenzuela P,Hernán; Retamal V,Víctor;
International Journal of Morphology , 2012, DOI: 10.4067/S0717-95022012000300033
Abstract: to establish the dimensions of the masseter muscle deep as a facial index in relation to gender, an analytical study was conducted among patients who were attended at the imaging service linares hospital, chile. the sample was 180 masseter muscles, 90 of them belonging to female individuals and 90 individuals belonging to male subjects. the subjects were classified according to facial index in euryprosopous, mesoprosopous and leptoprosopous. each group was composed of 60 muscles. the depth of each masseter muscles was performing using an ultrasound-imaging test. the sample was subjected to anova statistical analysis. the depth of masseter muscles varied depending facial index in both sexes (p <0.05). euryprosopous individuals showed an average of 11.5±2.08 mm for male and 8.8±1.4 mm for female. mesoprosopous individuals showed an average of 11.4±1.6 mm. for male and 7.8±1.6 mm for female. leptoprosopous individuals showed an average of 10.08±1.2 mm for male and 7.7±1.4 mm. for female. the depth of the masseter muscle varies depending of facial index on both sexes. the difference is significant between muscles of leptoprosopous and euryprosopous subjects (p <0.005). it was concluded that the facial index of individuals should be considered in the diagnosis of altered masticatory muscle size.
Dimensiones del músculo masetero medido mediante ultrasonido, según sexo
Frugone A,Raúl; Hernández C,Arnoldo; Valenzuela P,Hernán; Retamal,Víctor;
Revista Facultad de Odontología Universidad de Antioquia , 2010,
Abstract: introduction: in order to establish the dimensions in depth, width and length of the masseter muscle according to gender, a non analytical experimental observational study was performed on selected patients who attended the echography service at the base hospital of linares-chile between july and september 2005. methods: the sample consisted of 180 masseter muscles, 90 from female individuals and 90 from male individuals. measurements of each masseter muscle were performed utilizing an echographic exam. anova test statistical analysis was performed. results: the masseter muscle depth on male individuals has an averaged 10.8 ± 1.6 mm and on female individuals an average depth of 8.1 ± 1.4 mm. conclusions: according to the findings, we concluded that in male individuals with a depth of the masseter muscle higher to 12.4 mm and in female individuals with a depth of masseter higher to 9.5 mm could be considered a diagnosis of masseteric hypertrophy.
Profundidad del Músculo Masetero Medido Mediante Ultrasonido, según índice Facial en Relación al Sexo Masseter Muscle Deep Measured by Ultrasound per Facial Index Related to Sex
Arnoldo Hernández Caldera,Raúl Frugone Zambra,Hernán Valenzuela P,Víctor Retamal V
International Journal of Morphology , 2012,
Abstract: Para establecer las dimensiones en profundidad del músculo masetero según índice facial en relación al sexo, se realizó un estudio analítico no experimental entre pacientes seleccionados que acudieron al servicio de imagenología del hospital base de Linares, Chile. La muestra quedó determinada por 180 músculos maseteros, 90 de mujeres y 90 de hombres. Se clasificaron según su índice facial en euriprosopos, leptoprosopos y mesoprosopos quedando la muestra conformada por 60 músculos de individuos euriprosopos, mesoprosopos y leptoprosopos, respectivamente. Se realizó la medición de la profundidad de cada uno de los músculos maseteros utilizando para ello un examen imagenológico ecográfico. La muestra se sometió al análisis estadístico ANOVA. La profundidad del músculo masetero varió dependiendo del índice facial y en ambos sexos (p <0,05). Los individuos euriprosopos presentaron músculos maseteros con profundidades promedio de 11,5±2,08 mm para el sexo masculino y de 8,8±1,4 mm para el sexo femenino. Los individuos mesoprosopos presentaron profundidades de 11,4±1,6 mm para el sexo masculino y 7,8±1,6 mm para el sexo femenino. Mientras que los individuos leptoprosopos presentaron profundidades promedio para el sexo masculino de 10,08±1,2 mm y 7,7±1,4 mm para los individuos de sexo femenino. La profundidad del músculo masetero varia dependiendo del índice facial en relación al sexo. Esta diferencia se encuentra entre el grupo de los individuos leptoprosopos y el grupo de los euriprosopos (p< 0,005). Se concluye que el índice facial de los individuos debe ser considerado en el diagnóstico de alteraciones de tama o de la musculatura masticatoria. To establish the dimensions of the masseter muscle deep as a facial index in relation to gender, an analytical study was conducted among patients who were attended at the imaging service Linares Hospital, Chile. The sample was 180 masseter muscles, 90 of them belonging to female individuals and 90 individuals belonging to male subjects. The subjects were classified according to facial index in euryprosopous, mesoprosopous and leptoprosopous. Each group was composed of 60 muscles. The depth of each masseter muscles was performing using an ultrasound-imaging test. The sample was subjected to ANOVA statistical analysis. The depth of masseter muscles varied depending facial index in both sexes (p <0.05). Euryprosopous individuals showed an average of 11.5±2.08 mm for male and 8.8±1.4 mm for female. Mesoprosopous individuals showed an average of 11.4±1.6 mm. for male and 7.8±1.6 mm for female. Leptoprosopous individuals s
Dimensiones del músculo masetero medido mediante ultrasonido, según sexo Masseter muscle dimensions measured by ultrasound per sex
Raúl Frugone A,Arnoldo Hernández C,Hernán Valenzuela P,Víctor Retamal
Revista Facultad de Odontología Universidad de Antioquia , 2010,
Abstract: INTRODUCCIóN: para establecer las dimensiones en profundidad, ancho y largo del músculo masetero según sexo, se realizó un estudio analítico no experimental entre pacientes seleccionados que acudieron al servicio de ecografía del Hospital Base de Linares, Chile entre los meses de julio y septiembre del a o 2005. MéTODOS: la muestra quedó determinada por 180 músculos maseteros, 90 de ellos pertenecientes a individuos de sexo femenino y 90 pertenecientes a individuos de sexo masculino. Se realizaron las mediciones de cada una de las dimensiones del músculo masetero utilizando para ello un examen imaginológico ecográfico. La muestra se sometió al análisis estadístico ANOVA. RESULTADOS: los individuos de sexo masculino presentan músculos maseteros con profundidades promedio de 10,8 ± 1,6 mm y los individuos de sexo femenino profundidades promedio de 8,1 ± 1,4 mm. CONCLUSIONES: de acuerdo con lo encontrado, se concluye que en individuos de sexo masculino con una profundidad del músculo masetero mayor a 12,4 mm y en individuos de sexo femenino con una profundidad del músculo masetero mayor a 9,5 mm se podrían considerar el diagnóstico de hipertrofia maseterina. INTRODUCTION: in order to establish the dimensions in depth, width and length of the masseter muscle according to gender, a non analytical experimental observational study was performed on selected patients who attended the echography service at the Base Hospital of Linares-Chile between July and September 2005. METHODS: the sample consisted of 180 masseter muscles, 90 from female individuals and 90 from male individuals. Measurements of each masseter muscle were performed utilizing an echographic exam. ANOVA test statistical analysis was performed. RESULTS: the masseter muscle depth on male individuals has an averaged 10.8 ± 1.6 mm and on female individuals an average depth of 8.1 ± 1.4 mm. CONCLUSIONS: according to the findings, we concluded that in male individuals with a depth of the masseter muscle higher to 12.4 mm and in female individuals with a depth of masseter higher to 9.5 mm could be considered a diagnosis of masseteric hypertrophy.
Isolation and Characterization of Mercury Resistant Trichoderma Strains from Soil with High Levels of Mercury and Its Effects on Arabidopsis thaliana Mercury Uptake  [PDF]
José Luis Hernández-Flores, José Gerardo Bernal Melo, Andrés Cruz Hernández, Miguel A. Ramos López, Carlos Salda?a Gutiérrez, Sergio Romero Gomez, Victor Pérez Moreno, Rosa P. Calvillo Medina, José Humberto Valenzuela Soto, Sergio Pacheco Hernández, George H. Jones, Sergio Casas Flores, Juan Campos-Guillen
Advances in Microbiology (AiM) , 2018, DOI: 10.4236/aim.2018.87040
Abstract: Traditional mining activities are usually correlated with high levels of soil pollution, which is a major environmental concern. Extensive mining activities have taken place in the San Joaquin region in the State of Querétaro, México resulting in high levels of mercury soil pollution (up to 1532 ± 300 mg/kg). We isolated mercury-resistant fungal strains from the San Joaquin region soils and identified them through morphologic characteristics and ITS rDNA region sequence analysis. We determined that fungi isolated belong to the genus Trichoderma. All the isolates selected showed the ability to catalyze the volatilization of Hg. For air sampling, an active sampling device was constructed and using acid KMnO4 as an absorbent, the concentration of mercury in solution was determined through the cold vapor atomic absorption method. The results show mercury volatilization from the fungal species assay, with a maximum of 213.04 ± 32.6 μg/m3 while mycelium accumulation ranged from less than 17.5 ± 2.9 to 20.0 ± 3.4 μg/g. The fungal isolates were also evaluated for their ability to reduce mercury uptake in Arabidopsis thaliana. These observations suggest the utility of Trichoderma for the mobilization of mercury in those contaminated soils.
Más sobre alfabetización informacional
Licea de Arenas,Judith; Gómez Hernández,José Antonio; Valles Valenzuela,Javier;
ACIMED , 2009,
Abstract: the search for incentives to promote the use of information resources, their identification, evaluation, understanding and usage amongst library users and non-users is not new. however, the expression information literacy is relatively new and quite common nowadays because of the internet and the accessibility to intranets and extranets. in this context librarians have to exert good practices in order to contribute to the elimination of teaching activities based on the chalk and the blackboard. if information literacy means the education of students for a better life, any action should be focused on the development of information competencies including other implicit literacies in order to abandon traditional teaching methods to place the web at the center of the teaching-learning process.
Alternativas para la Eliminación Doméstica de Fluor en el Agua de Consumo Humano
Valenzuela,Lorenzo; Ramírez-Hernández,Jorge; Sol,Jesús A; Reyes,Jaime A;
Información tecnológica , 2011, DOI: 10.4067/S0718-07642011000200004
Abstract: oxide of magnesium, activated alumina, granular bone and bone chart were evaluated as methods of elimination of fluoride from water in order to propose the most feasible one for its domestic use. the water from the wells of the study área presents fluoride concentrations from 0.53 to 8.9 mg/l. the results indícate that activated alumina removes 42% of fluoride in 10 min, and the calcined bones removes 43% of fluoride in 5 minutes, from water with 8.7 mg/l of fluoride. both methods could be considered as viable options. to increase the removal of fluoride with activated alumina is necessary to vary the ph being this more complicated at domestic environment. also, the treated water could absorb aluminum from the alumina solution, which does not occur with the bone chart. the calcined bone is the best option since it does not cause alterations in the characteristics of the treated water, and this material is easy to obtain.
EXACTITUD ESPACIAL EN LA CREACIóN DE BASES DE DATOS SIG MODELOS RáSTER Y VECTORIAL
Mena Frau,Carlos; Ormazábal Rojas,Yony; Morales Hernández,Yohana; Gajardo Valenzuela,John;
Ingeniare. Revista chilena de ingeniería , 2008, DOI: 10.4067/S0718-33052008000100005
Abstract: representation spatial accuracy of geographic elements in a geographic information system (gis) database is subject to errors generated in the processes of data capture and processing, which is in evidence when more exact information is integrated. error quantification is fundamental when the decision-making is based on the information available. the study establishes a methodology to determine and compare the representation error of geographic elements in the vector and raster models. database includes point, line and polygon elements that represent real objects which are a tower, a road and a parcel. this information was obtained from land measurements with global positioning system (gps) that were processed to obtain vector layers. later, the convert of vectors layers into raster layers was made using pixel resolutions of 5, 10 and 20 meters. by means of a mathematical algorithm homologous coordinates between the elements represented in both models were determined. from the euclidean distance between homologous coordinates, a mean error of representation for each model was obtained that soon was used to make a statistical comparison analysis of space accuracy between models. the obtained results indicate that there are not significant differences between mean errors of vector and raster models, but there are differences between mean errors of the raster layers at different resolutions.
MORE THAN THE MOTIFS: THE ARCHAEOLOGICAL ANALYSIS OF ROCK ART IN ARID REGIONS OF THE SOUTHERN HEMISPHERE
Ross,June; Valenzuela R,Daniela; Hernández Llosas,María Isabel; Briones,Luis; Santoro,Calogero M;
Chungará (Arica) , 2008, DOI: 10.4067/S0717-73562008000300005
Abstract: three regional rock art studies undertaken in the southern hemisphere (northwest central queensland in australia, lluta valley in northern chile and quebrada de humahuaca in northwest argentina) are analysed. based on the relationships between rock art and other aspects of the physical, social and chronological context of its production, we show the articulation between the production of rock art and past social strategies. the three examples demónstrate many consistencies in the way rock art has been utilised in arid environments while also identifying regionally distinct variations in technique and function. in each of the arid regions, competition aróse for limited and valued resources. in each example, the production of rock art was used as a powerful tool to negotiate newly arising circumstances in order to ensure predictable and desirable economic and social outcomes for the artists' group. the methods and form used to achieve these outcomes varied in each case study, because of the availability of materials for art production, the topography and environmental conditions in each specific área, particular cultural preferences and the ways in which people utilised art. in northwest central queensland the rock art assemblage was employed for the negotiation of group identity at several levéis. in the lluta valley, the geoglyphs embody social, political and economical aspirations, being produced as a means of legitimating the access of lama caravans to the coast and its resources. in the quebrada de humahuaca increased competition for resources led to the production of different rock art assemblages; the herders produced panels that played roles such as marking grazing territories, commemorating past events and most significantly, as part of the ritual life of the herders.
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