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Search Results: 1 - 10 of 42276 matches for " Manuel;González Estrada "
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Surgical treatment in thoraco-lumbar region fractures. Tratamiento quirúrgico de las fracturas de columna en la región toracolumbar
Jorge Alberto Jerez Labrada,Dania Zú?iga Estrada,Yoan Manuel Qui?ones González,Francisco José Lam González
MediSur , 2010,
Abstract: Background: thoraco-lumbar fractures may affect people at any moment of their lives, especially at their most fruitful and useful stage. Its correct diagnosis and treatment may directly influence in the posterior evolution of the patients. Objectives: to evaluate the results of the surgical treatment in thoraco-lumbar region fractures. Methods: a descriptive retrospective correlational study of series cases which included 54 patients attended due to thoraco-lumbar region fractures in the University Hospital “Dr. Gustavo Aldereguía Lima” in Cienfuegos city, Cuba from January 1999 to June 2007. Age, sex, etiology of the fracture, type and level of the fractures, associated diseases, surgical techniques used for, pre and post operatory neurological damage, usage of metilprednisolone, complications and final results were the variables taken into consideration in this study. Results: most of the patients belonged to male sex under the age of 45. The totality of the cases had type IV fracture, and a great part of them had Denis type II fracture having surgical treatment. The causes of the lesions were traffic accidents, working accidents and height falls. The most useful surgical techniques were posterior decompression, instrumentation and fusion. Surgery improved the neurological damage in almost half of sick patients with this condition. Complications were minimum and rupture of the implant was predominant. Conclusion: surgical treatment in thoraco-lumbar region fractures had satisfactory results in our milieu. Fundamento: Las fracturas de columna vertebral pueden afectar a las personas en cualquier momento de su vida, especialmente en la etapa más útil y fructífera. Su correcto diagnóstico y tratamiento influyen directamente en la posterior evolución de los pacientes. Objetivo: Evaluar los resultados del tratamiento quirúrgico de las fracturas de columna en la región toracolumbar. Métodos: Estudio descriptivo correlacional retrospectivo de serie de casos que incluyó 54 pacientes atendidos por fractura de columna en región toracolumbar en el Hospital Provincial “Gustavo Aldereguía Lima” de Cienfuegos, durante el periodo de enero de 1999 a junio de 2007. Se estudiaron las siguientes variables: edad, sexo, etiología de la fractura, tipo y nivel fractura, enfermedades asociadas, técnica quirúrgica empleada, da o neurológico pre y postoperatorio, uso de la metilprednisolona, complicaciones y resultados finales. Resultados: La mayor parte de los pacientes fueron hombres menores de 45 a os edad. La totalidad de los casos con fractura tipo IV y una gran parte del
Los subsidios agrícolas de México
González-Estrada, Adrián;Orrantia-Bustos, Manuel Alejandro;
Agricultura técnica en México , 2006,
Abstract: the mexican agriculture confronts serious problems and challenges, many voices demand for more subsidies and supports from the government. the prevailing idea is that our agriculture is not supported in the same way as it is in developed countries and it is argued that countries we trade with, subsidize much more their agriculture and that for that reason, we are an able to compete internationally. the objectives of this research were: to analyze the temporal behaviour of the total amount of the subsidies to the mexican agriculture during 1986-2003; to compare the agricultural subsidies in mexico to those of our main commercial partners, and to evaluate propositions supporting the idea of abandonment of the mexican rural sector by the state, the lack of protection to our agriculture and the insufficiency of agricultural subsidies. in opposition to the belief of the majority of mexican economists, and after the calculation of the percentage of the production value that corresponds to subsidies (eps%) it was concluded that our country's relative level of subsidies to its agriculture is similar to those in the united states of america and canada, its main commercial partners, and less than those in the european union and japan. rather than to increase agricultural subsidies, mexico should invest considerably more in all the support services required to promote the intensification and productivity of the agricultural sector.
Enfermedad del desarrollo de la cadera
Ria?o Echenique,Jorge; García Estrada,Elsa M.; González Gil,José Manuel;
Revista Cubana de Ortopedia y Traumatolog?-a , 2000,
Abstract: a casuistics of 200 children with clinical and/or radiological signs of congenital hip dysplasia, accounting for 2.20 % of the newborn infants, is analyzed in this paper. among the results we found a higher frequency among the children from young mothers, mainly in those of rural origin, a high percentage of breech presentations, an elevated incidence in gestational ages over 39 weeks, a predominance of the female sex, higher unilateral affectation with an evident prevailing of injury on the left side and a relatively low number of associated malformations. the most frequent anatomoradiological forms observed were dysplasia, subluxations and luxations with a high proportion of unilateral association of abnormalities. the treatment was based on pavlick harness for cephalic dysplasia and acetabular dysplasias with or without subluxations and cast in physiological position of the articulation in the luxation, as well as on tenotomies in those cases of limited abduction. the results were favorable.
The Antibacterial Metabolites and Proacacipetalin from Acacia cochliacantha
J. Jesús Manríquez Torres,Armida Zú?iga Estrada,Manuel González Ledesma,J. Martín Torres Valencia
Revista de la Sociedad Química de México , 2007,
Abstract: La separación cromatográfica de los extractos antibacterianos de hexano, acetato de etilo y metanol de la parte aérea de Acacia cochliacantha condujo a la obtención de doce compuestos antibacterianos conocidos: b-sitosterol, estigmasterol, 3-O-b-D-glucósido de b-sitosterol, 3-O-b-D-glucósido de estigmasterol, lupenona, taraxerona, apigenina, luteolina, quercetina, ácido gálico, galato de metilo y ácido salicílico cuyos valores de MIC fueron determinados. Adicionalmente, se aislaron proacacipetalin, escualeno, (+)-pinitol y los ácidos palmítico, linoleico, oleico, esteárico y mirístico. Estos compuestos se caracterizaron completamente mediante espectroscopía de RMN en 1D y 2D, así como por sus propiedades físicas. Esta es la primera vez que el 3-O-b-D-glucósido de estigmasterol y la taraxerona se aíslan de Acacia.
Nota crítica sobre Orayen: de la forma lógica al significado
Estrada González, Luis;
Diánoia , 2011,
Abstract: the aim of this critical note is threefold: (i) it briefly describes and comments on each of the articles of orayen: de la forma lógica al significado; (ii) identifies some issues that may not be clear enough or not fully developed whether in the articles or even in orayen's replies; (iii) as far as possible, it refers to further studies made by the authors themselves on the same, or quite related, subjects addressed by them in their papers.
Nota crítica sobre Orayen: de la forma lógica al significado Critical Note on Orayen: de la forma lógica al significado
Luis Estrada González
Diánoia , 2011,
Abstract: En esta nota crítica (i) se hace una breve descripción de cada uno de los artículos que componen Orayen: de la forma lógica al significado, (ii) se se alan algunas cuestiones que no están claras en ellos o en las réplicas de Orayen y, (iii) en la medida de lo posible, se indica si los autores desarrollan ulteriormente los problemas abordados en sus artículos. The aim of this critical note is threefold: (i) it briefly describes and comments on each of the articles of Orayen: de la forma lógica al significado; (ii) identifies some issues that may not be clear enough or not fully developed whether in the articles or even in Orayen's replies; (iii) as far as possible, it refers to further studies made by the authors themselves on the same, or quite related, subjects addressed by them in their papers.
Rendimiento y calidad de semilla del frijol ayocote en el Valle de México
Ayala Garay, Oscar Javier;Pichardo González, Juan Manuel;Estrada Gómez, Julio Arturo;Carrillo Salazar, José Alfredo;Hernández Livera, Adrián;
Agricultura técnica en México , 2006,
Abstract: in the conservation and propagation of runner bean (phaseolus coccineus l.), the seed is a basic element. in this study, the seed yield and seed quality of nine runner bean cultivars were evaluated in two planting dates 1) may 2nd and 2) june 17th, 2003) at montecillo, state of mexico, mexico. seed physiological quality was evaluated by the accelerated aging test at 42 °c and high relative humidity for 120 h. seed vigor was determined by the velocity of seed emergence in sand, the percentage of emergence and the dry weight of 10 seedlings. seed yield from the first planting date (529 g plant-1) was significantly higher than the yield from the second date (334 g plant-1), this was also true for the seed physical quality with a hectoliter weight of 75 and 73 kg hl-1 and 100-seed weight with 123 and 110 g, respectively. on the contrary, the parameters related to seed physiological quality were higher in the second planting date in relation to the first, whose percent of emergency were 84 and 62%, and 2.81 and 2.15 for the number of seedlings emerged d-1 and 3.7 and 3.1 g for the average dry weight of 10 seedlings, respectively. higher yields and seed physical quality were obtained in the first planting date, while high seed physiological quality was observed in the second. this last result was due to the fact that the seed produced in the second date had less exposure to the environmental conditions after maturation. early sowing dates and harvesting as soon as maturity is reached is necesary to obtain seeds of high quality and vigor.
Transitional adakite-like to calc-alkaline magmas in a continental extensional setting at La Paz Au-Cu skarn deposits, Mesa Central, Mexico: metallogenic implications
Pinto-Linares, Porfirio J.;Levresse, Gilles;Tritlla, Jordi;Valencia, Víctor A.;Torres-Aguilera, José M.;González, Manuel;Estrada, David;
Revista mexicana de ciencias geológicas , 2008,
Abstract: the granodiorite intrusions with associated cu-au skarn mineralization of la paz district are located in the east part of the mesa central of mexico. the skarn developed at the contact between a middle cretaceous calc-argillaceous sedimentary sequence and the magmatic intrusions. aag-pb-zn vein system postdates the intrusive-skarn assemblage. two well defined fault systems (n-s and e-w) divide the la paz district. the n-s dolores fault, with a normal vertical displacement estimated between 500 to 1000 m, separates the western au-cu skarn zone from the eastern hydrothermal ag-pb-zn vein system. this fault is considered to be part of the taxco-san miguel de allende fault system. the u-pb dating of the intrusives at the la paz district clearly indicates a single emplacement event dated at ca. 37 ma (monocrystal zircon age). this age probably represents the last post-laramide orogenic mineralizing event known to occur in the sierra de catorce district. also, four calculated discordant ages suggest the presence of greenvilian basement underneath a a thick crust (35-45 km). the chemistry of the intrusive show a certain variability in composition, but they mostly belong to the high-k calc-alkaline magmatic series. major and trace elements relationships for the intrusives show a chemical evolution from the adakite to the island arc fields, and from mineralized to barren intrusives, repectively. they also suggest the importance of crustal delamination processes, and the necessity of deep cortical drains to transfer oxidized magmas and metals to surface.
Inclusión de heno de chícharo (Pisum sativum L.) y producción de gas in vitro en dietas para corderos en crecimiento
González García, Ulises Alejandro;González Ronquillo, Manuel;Estrada Flores, Julieta G.;Bastida García, Jorge Luis;Pecador Salas, Nazario;Salem, Abdel-Fattah Z.M.;
Tropical and subtropical agroecosystems , 2011,
Abstract: the use of byproducts such as field pea {pisum sativum) is an alternative to feed sheep, the objective of this study was to evaluate the intake and digestibility in sheep fed different levels of field pea hay (fph). twenty rambouillet lambs (with an initial bw of 26.0 ± 0.43 kg) were fed to one of four treatments of 5 animals of each (0%, 25%, 50% and 75% inclusion of ph as dry matter basis). the content of cp for the fph was 8%. there were no significant differences (p>0.1) between treatments for dm intake (947.6 ± 32.3 g/d), om (856.7 ± 24.8) and ndf (583.5 ± 30.6), as well as digestibility (g/loog) of dm (50.3 ± 1.0), om (49.4 ± 2.38) and ndf (57.0 ± 2.23). n intake was lower (p<0.05) for ph 25% compared to 0%, no significant differences (p>0.1) for n excretion in feces, urine and n balance between treatments. in vitro gas production in the fraction a (ml gas / g dm incubated) was lower in fph compared to corn stover (cs) and corn grain (cg). fraction b was higher (p <0.05) for fph compared to the other ingredients, however there were no differences (p>0.1) between cs and cg for fraction c. gas production (ml gas / g dm disappeared) was lower in fph compared to cs and cg. in vitro dm disappearance was lower for fph with respect to cg, however there were no differences (p>0.1) between cs and fph. fph can be used in diets for sheep up to 75% of inclusion, without affecting intake and digestibility. the gas production technique allows the prediction of in vitro fermentation and rumen degradation, showing a lower fermentation with 25% inclusion of fph.
Detección de una mutación en el gen KCNQ1 (KvLQT1) causante de síndrome de Jervell, Lange-Nielsen en una familia mexicana
Márquez, Manlio F;Ramos-Kuri, Manuel;Hernández-Pacheco, Guadalupe;Estrada, Javier;RFabregat, Juan;Pérez-Vielma, Nadia;Gómez-Flores, Jorge;González-Hermosillo, Antonio;Cárdenas, Manuel;Vargas-Alarcón, Gilberto;
Archivos de cardiología de México , 2006,
Abstract: background: long qt syndromes (lqts) are inherited cardiac disorders caused by mutations in the genes that encode sodium or potassium transmembrane ion channel proteins. more than 200 mutations, in at least six genes, have been found in these patients. the jervell and lange-nielsen (jln) syndrome is the recessive form of the disease and is associated with deafness. few families with jln syndrome and genetic studies are reported in the literature. methods: the kcnq1 (kvlqtl) gene in a mexican family with jervell-lange-nielsen long qt syndrome was analyzed using an automated sequence method. results: a missense mutation was found in the three affected individuals. this mutation is associated with complete loss of channel function. correlation with the phenotype showed a prolonged qtc interval and deafness in the two siblings homozygous to the mutation. the mother, who was heterozygous for the mutation, also had prolonged qtc interval without deafness. the father and younger brother had normal qtc intervals. the mutation was not found in 50 healthy controls studied. conclusions: we describe for the first time a mutation in the kcnq1 gene in a mexican family with jln long qt syndrome. this mutation produces an amino acid change (gly-arg) at protein level at the 168 residue. this mutation has been previously reported in caucasian families with lqts.
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