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Search Results: 1 - 10 of 209719 matches for " Edison Pizarro López "
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Estrés oxidativo en el semen equino criopreservado
Giovanni Restrepo Betancur,Edison Pizarro López,Benjamín Alberto Rojano
Revista Lasallista de Investigación , 2012,
Abstract: La escasa fertilidad del semen equino criopreservado ha limitado de manera sustancial su uso en procedimientos de biotecnología reproductiva. El estrés oxidativo es uno de los factores más relacionados con este fenómeno, debido al incremento en los niveles de especies reactivas de oxígeno (ERO) en el semen como resultado del choque térmico, de la toxicidad de los crioprotectores, y de la alteración en la disponibilidad y la funcionalidad de los antioxidantes endógenos durante los procesos de criopreservación. Esta revisión analiza el efecto del estrés oxidativo sobre la fertilidad del semen equino criopreservado.
Comunidades de escorpiones (Arachnida: Scorpiones) del desierto costero transicional de Chile
AGUSTO,PABLO; MATTONI,CAMILO I; PIZARRO-ARAYA,JAIME; CEPEDA-PIZARRO,JORGE; LóPEZ-CORTéS,FRANCISCO;
Revista chilena de historia natural , 2006, DOI: 10.4067/S0716-078X2006000400001
Abstract: in chile, the order scorpiones has 35 species, included in the families bothriuridae, iuridae, and buthidae. most of them are endemic species, well adapted to xeric environments. we studied the taxonomic structure of the scorpiofauna with regards to the plant formations present in the transitional coastal desert of chile (25-32o s). captures of scorpions were conducted with pitfall traps and uv light. data from de field were complemented from literature and reference material. we identified the presence of 9 species in a total of 226 specimens captured, in the families bothriuridae and iuridae. the most abundant genera of bothriuridae, represented by eight species, were brachistosternus and bothriurus, with 55.4 % and 11 % respectively of total captured specimens. regarding brachistosternus, br. (leptosternus) roigalsinai was the most abundant species, with 38.9 % of total captured specimens. caraboctonus keyserlingi (iuridae) made the 33.2 % of total captured specimens. the highest species richness of scorpions, with six and seven species were respectively, the plant formations of the coastal desert of huasco (27°52' s, 71°05' w; 29°24' s, 71°18' w) and those of the coastal shrubby steppe (29°24' s, 71°18' w; 30°34' s, 71°42' w). the coastal deserts of tal-tal (23°52' s, 70°30' w; 27°51' s, 71°05' w) and huasco presented exclusive species. the analysis of correspondence showed that, to the scorpiofauna studied, the coastal shrubby steppe would represent a transitional zone of geographic distribution. finally, we discussed in function of substrate preference, some aspects related to habitat occupation showed by some of the recorded species
índices de selección y niveles independientes de descarte para dos características productivas y reproductivas en un hato holstein (Bos taurus)
Restrepo,Giovanni; Pizarro,Edison J;
Revista Colombiana de Ciencias Pecuarias , 2008,
Abstract: with the purpose to evaluate genetic selection by using indexes and independent culling levels (icl) for productive and reproductive traits, 305-d milk yield (my) and days open (do), 1707 and 1206 records for my and do, respectively, were analyzed. by means of the mtdfreml program genetic parameters for heritability of 0.23 ± 0.065 and 0.09 ± 0.074 for my and do, respectively, and for repeatability of 0.34 ± 0.061 and 0.18 ± 0.054 for my and do, respectively, were estimated. also the genetic, phenotypic and environmental correlations between my and do were estimated, resulting in values of 0.15 ± 0.32, 0.42 and 0.34, respectively. for the indexes and icl elaboration, and the estimation of genetic progress, different relations between relative economic values were analyzed. the highest progress was found for do:my economic values at 1:3 ratio. in the same way, evaluations for different selection intensities were done, where the highest genetic progress was obtained by the used of the maximum selection intensity (selected fraction of 10%) for both cases. although with both selection methods the achievement of simultaneous genetic progress for each trait was demonstrated, by estimating a comparative relationship between both genetic progresses, a 12.6% more genetic progress by each generation was found for index than for icl methods. nevertheless, despite being the index a better method for selection of the best animals it requires a more precise estimation of correlations between traits, a process that was not feasible performed in the present study. thereafter, icl is proposed as the more convenient for that type of selection program.
índices de selección y niveles independientes de descarte para dos características productivas y reproductivas en un hato holstein (Bos taurus) índice de sele o e níveis independentes de abate para dois características produtivas e reprodutivas em um rebanho holstein (Bos taurus) Selection indexes and independent culling levels for two productive and reproductive traits in a holstein (Bos taurus) dairy herd
Giovanni Restrepo,Edison J Pizarro
Revista Colombiana de Ciencias Pecuarias , 2008,
Abstract: Con la finalidad de evaluar la selección mediante índices y niveles independientes de descarte (NID), para las variables producción de leche ajustada a 305 días (PL) y periodo abierto (PA), fueron analizados 1708 y 1206 registros para PL y DA, respectivamente. Mediante el programa MTDFREML se estimaron parámetros de heredabilidad de 0.23 ± 0.065 y 0.09 ± 0.074, para PL y PA, respectivamente; y repetibilidad de 0.34 ± 0.061 y 0.18 ± 0.054, para PL y PA, respectivamente. Las correlaciones genética, ambiental, y fenotípica se estimaron entre PL y PA, con valores de 0.15 ± 0.32, 0.42 y 0.34, respectivamente. Para la elaboración de índices y NID, y para la estimación de sus progresos genéticos, fueron analizadas diferentes relaciones entre valores económicos relativos. Los mayores progresos fueron encontrados para unos valores económicos relativos de 1 a 3 (PA:PL). Así mismo, diferentes intensidades de selección fueron evaluadas encontrando para ambos casos que los mayores progresos genéticos fueron obtenidos para la máxima intensidad de selección utilizada (fracción seleccionada del 10%). Ambos métodos de selección demostraron la obtención de progresos genéticos simultáneos para los rasgos en estudio; sin embargo, de acuerdo con la estimación de una relación comparativa entre los progresos genéticos, se encontró que mediante el método de índices se proyectó un 12.6% más progreso genético por generación respecto del progreso estimado para NID. A pesar de esto y de ser el índice un método superior para la elección de los mejores animales, este requiere una estimación precisa de las correlaciones entre las características, lo cual no fue del todo factible en el desarrollo de este trabajo, por lo que se sugiere que el uso del NID es más conveniente para un programa de selección de esta naturaleza. A fim de avaliar a sele o através de índices e níveis independentes de abate (NID), para as variáveis produ o de leite ajustada para 305 dias (PL) e dia aberto (DA), foram analisados os registros para 1708 e 1206 MP e DA, respectivamente. Através do programa MTDFREML parametros da herdabilidade de 0,23 ± 0,09 ± 0.065 e 0.074, foram estimados para PL e PA, respectivamente, e parametros de repetibilidade de 0.34 ± 0.061 e 0.18 ± 0.054, para PL e PA, respectivamente. Correla es genéticas, fenotípicas e ambientais foram estimados entre PL e PA, com valores de 0.15 ± 0.32, 0.42 e 0.34, respectivamente. Para o desenvolvimento de indicadores e NID, e para estimar seu progresso genético rela es econ micas entre os diferentes valores foram analisados. O maior avan o foi enc
Funciones del profesional de enfermería en salas de hospitalización de adultos: tratando de dar cuidado directo
Alcaraz López,Gloria; Zapata Herrera,Marleny; Gómez Gómez,Margarita; Tavera Agudelo,Edison;
Investigación y Educación en Enfermería , 2010,
Abstract: objective: to describe the duties and work of nursing professionals who work in the adult hospitalization floors. methodology: ethnographic study where 17 nurses who worked in the adult hospitalization floors in health care institutions located in the metropolitan area of the aburra valley in medellin (colombia) were interviewed during the year of 2007. ten observations about the studied phenomenon were made in the floors where the participants worked. the results were socialized with the study participants to verify if they recognized the performed analysis. results: four analysis categories were identified: floor management, trying to give direct care, criteria for the classification of care and delegated care. the study participants are mainly engaged in management duties. their work is centered specially in medical delegated activities and floor management. they establish the necessity to give care according to technical and biological criteria, and the care is delegated to the nurses? aide personnel. the direct contact with the patients is reduced most of the times to a courtesy and protocol greeting. between the nurses exists a guilt feeling for not giving direct care. conclusion: the direct care is in second place after the doctor delegated duties and management service.
Funciones del profesional de enfermería en salas de hospitalización de adultos: tratando de dar cuidado directo Fun es do profissional de enfermagem em salas de hospitaliza o de adultos: tratando de dar cuidado direto Nursing professionals duties in adult hospitalization floors: trying to give direct care
Gloria Alcaraz López,Marleny Zapata Herrera,Margarita Gómez Gómez,Edison Tavera Agudelo
Investigación y Educación en Enfermería , 2010,
Abstract: Objetivo: describir las funciones y el quehacer del profesional de enfermería que labora en salas de hospitalización de adultos. Metodología: estudio etnográfico en el que fueron entrevistadas 17 enfermeras que laboraban en salas de hospitalización de adultos en instituciones de salud de la ciudad de Medellín y del área Metropolitana del Valle de Aburrá (Colombia), en 2007. Se hicieron diez observaciones del fenómeno estudiado en las salas en que trabajaban las participantes. Los resultados fueron socializados con las participantes de estudio para verificar si se reconocían en el análisis realizado. Resultados: se identificaron cuatro categorías de análisis: administrar la sala, tratando de dar cuidado directo, criterios para la clasificación del cuidado y el cuidado delegado. Las participantes en el estudio están principalmente ocupadas en funciones administrativas; su quehacer está centrado especialmente en actividades médico delegadas y de administración de la sala. Establecen la necesidad de brindar cuidado según criterios biológicos o procesos técnicos, y el cuidado es delegado en el personal auxiliar de enfermería. El contacto directo con los pacientes se reduce a un saludo protocolario y de cortesía la mayoría de las veces. En las enfermeras existe un sentimiento de culpabilidad por no dar el cuidado directo. Conclusión: el cuidado directo está en segundo lugar, después de las funciones médico delegadas y administrativas del servicio. Objetivo: descrever as fun es e o afazer do profissional de enfermagem que labora em salas de hospitaliza o de adultos. Metodologia: estudo etnográfico no que se entrevistaram a 17 enfermeiras que laboravam em salas de hospitaliza o de adultos em institui es de saúde da cidade de Medellín e da área Metropolitana do Vale de Aburrá (Col mbia) em 2007. Fizeramse dez observa es do fen meno estudado nas salas em que trabalhavam as participantes. Os resultados foram socializados com as participantes de estudo para verificar se reconheciam na análise realizada. Resultados: identificaramse quatro categorias análises: administrar a sala, tratando de dar cuidado direto, critérios para a classifica o do cuidado e o cuidado delegado. As participantes do estudo est o principalmente ocupadas em fun es administrativas; seu afazer está centrado especialmente em atividades médico delegado e de administra o da sala. Estabelecem a necessidade de brindar cuidado segundo critérios biológicos ou processos técnicos, e o cuidado é delegado ao pessoal auxiliar de enfermagem. O contato direto com os pacientes se reduz a uma sauda o p
Concordancia en el diagnóstico nutricional según índice de masa corporal, entre el equipo de salud y las escuelas de la Comuna de Colina
Schonhaut B,Luisa; Rodríguez O,Lorena; Pizarro Q,Tito; Kohn B,Jocelyn; Merino L,Daniela; López O,Alejandra; Leyton P,Glasfira;
Revista chilena de pediatría , 2004, DOI: 10.4067/S0370-41062004000100004
Abstract: introduction: junaeb evaluates the nutritional state of schoolchildren using measurements of weight and height obtained by schoolteachers in the state schools. objective: to compare the nutritional state using the bmi measured at school against that measured by the health team. hypothesis: that the measurements taken by both teams are the same, with a kappa index of > 0,8. methods: the concordance between both groups was analysed from the measurements taken from pupils of the 1st grade in 9 schools in the borough of colina, involving 416 pupils. results: prevalence of overweight or obesity measured by schoolteachers was 38% and by health team 29% (p < 0,05); underweight 4,4% vs 5,8% respectively (ns). the concordance of the diagnoses was kappa = 0.56. conclusions: there was a low concordance in the diagnosis of nutritional state between healthcare and scoolteacher teams, making it indispensable to review the nutritional state evaluation process
LA INVERSIóN EN ACTIVOS FIJOS REALES PRODUCTIVOS: INCENTIVOS Y OBSTáCULOS TRIBUTARIOS
LóPEZ áVILA,CéSAR OMAR; AGUILERA MARTíNEZ,ALONSO JAVIER; COLLAZOS GóMEZ,CONSTANZA E.; GóMEZ GóMEZ,ELIZABETH; RIZO PIZARRO,GLORIA LILIANA;
Estudios Gerenciales , 2009,
Abstract: investment in productive real fixed assets: tax incentives and obstacles entrepreneurial investments oriented to the improvement of processes and cost reductions, sometimes cause difficulties in accounting interpretation regarding tax laws. this case describes the situation faced by sugar s.a. after using a special tax deduction equivalent of 40% of its investments in order to reduce its income taxes. the tax administration rejected this tax deduction and informed the company of a possible sanction. the case stimulates the reader to find a solution that must be carried out by the company?s management to minimize costs and risks.
BICAP tumor probe en el tratamiento paliativo de la estenosis esofágicas malignas
Catán G,Felipe; Uribe M,Mario; Carvajal H,Carlos; Cavalleri B,Silvana; Pizarro I,Francisco; Uribe L,Juan Pablo; Uribe-Echevarría A,Sebastián; López H,Cristián; Venegas D,Lorena;
Revista médica de Chile , 2000, DOI: 10.4067/S0034-98872000000500009
Abstract: background: bicap tumor probe is a device that consists in an energy source and olives that deliver bipolar electricity. it can be used for the fulguration of esophageal tumors after endoscopic dilatation. aim: to report the experience in the treatment of malignant esophageal stenoses using the bicap tumor probe. patients and methods: patients with advanced esophageal tumors in aphagia, that were not candidates for palliative surgery were included in this study. after endoscopic dilatation, the tumor was fulgurated with the bicap tumor probe. results: twenty one patients (nine male, aged 43 to 91 years old) were treated with the device. a mean of 1.3 sessions with bicap were necessary to obtain tumor permeabilization, which was obtained in all patients. one patient died of pneumonia 15 days after the procedure. all other patients were ingesting liquid or semisolid diets after two months of follow up. mean survival after the procedure was 3.8 months. conclusions: electrical fulguration of esophageal tumors is a valid therapeutic alternative in aphagic patients. (rev méd chile 2000; 128: 513-8)
USO Y MANEJO DE LE?A POR LA COMUNIDAD CAMPESINA DE SAN JOSé DE SUAITA (SUAITA, SANTANDER, COLOMBIA)
Valderrama,Edison; Linares,égar L.;
Colombia Forestal , 2008,
Abstract: the firewood use on the part of the rural communities of the colombian andes has always been seen as a cultural practice that affects the mountain wild forests negatively. in san josé of suaita′s police inspection, firewood use and handling on the part of inhabitants of the field and of a semi-urban helmet. the results show cultural practices that reflect interesting relationships with the surroundings: knowledge of the dynamics of regeneration of the vegetation, use of diverse agricultural systems as firewood source, wide use of popular taxonomies to distinguish each species and valuation of the quality of the firewood.
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