oalib

Publish in OALib Journal

ISSN: 2333-9721

APC: Only $99

Submit

Any time

2019 ( 575 )

2018 ( 1058 )

2017 ( 967 )

2016 ( 1410 )

Custom range...

Search Results: 1 - 10 of 573484 matches for " María E. Solarte-Cruz "
All listed articles are free for downloading (OA Articles)
Page 1 /573484
Display every page Item
EFECTO DEL GRADIENTE ALTITUDINAL SOBRE ASPECTOS AUTOECOLóGICOS DE ESPELETIA PYCNOPHYLLA ssp. ANGELENSIS CUATREC. (ASTERACEAE) EN EL PáRAMO EL INFIERNILLO (NARI?O-COLOMBIA)
Benavides-Martínez,Iván F.; Burbano-Martínez,Diana L.; Urbano-Apráez,Sandra M.; Solarte-Cruz,María E.;
Actualidades Biológicas , 2007,
Abstract: some autoecological features of espeletia pycnophylla ssp. angelensis cuatrec. such as its demographic structure, population density, spatial pattern of dispersion, production of reproductive structures, adult morphometry and survivorship, were studied in an altitudinal gradient on a dry paramo of nari?o (colombia). hypothesis proposed by other authors about a linear effect caused by the elevation on these variables were completely rejected. the elevation induces an ecoclinal effect on population density, and this density correlates negatively with both production of reproductive structures and adult sizes. these results elucidate an unequivocal effect of density-dependence phenomena on population fitness. the intermediate zone of the altitudinal gradient exhibits a high population density, but on the other hand show reduced corporal adult sizes, minimal production of reproductive structures and the probability of juveniles reaching advanced ages is low. evidently, this intermediate elevation can have favorable ecological conditions for the seedling establishment, wich increments population densities at long term. we propose that other author's generalizations about the influence of elevation on the autoecology of these plants are limited, because the particular life and disturbance stories of paramos and the spatial, ecological and genetic isolating are explicative factors impossible to take away from the context. the demographic structure of the population fitted the logarithmic model, revealing its early regeneration state from the last fire event on 2003 and the similarity of the survivorship curves among every elevation, probed a high demographic stability.
EFECTO DEL GRADIENTE ALTITUDINAL SOBRE ASPECTOS AUTOECOLóGICOS DE ESPELETIA PYCNOPHYLLA ssp. ANGELENSIS CUATREC. (ASTERACEAE) EN EL PáRAMO EL INFIERNILLO (NARI O-COLOMBIA) THE EFFECT OF THE ALTITUDINAL GRADIENT ON AUTOECOLOGICAL FEATURES OF ESPELETIA PYCNOPHYLLA ssp. ANGELENSIS CUATREC. (ASTERACEAE) IN THE PARAMO 'EL INFIERNILLO' (NARI O-COLOMBIA)
Iván F. Benavides-Martínez,Diana L. Burbano-Martínez,Sandra M. Urbano-Apráez,María E. Solarte-Cruz
Actualidades Biológicas , 2007,
Abstract: Se estudió el efecto de la elevación sobre algunos aspectos autoecológicos de la especie Espeletia pycnophylla ssp. angelensis Cuatrec. (Asteraceae), tales como su estructura demográfica, densidad poblacional, patrón de distribución espacial, producción de estructuras reproductivas, morfometría de adultos y supervivencia, en un páramo seco del departamento de Nari o (Colombia). Las hipótesis propuestas por otros autores acerca del efecto lineal que la elevación produce sobre estas variables, fueron completamente rechazadas. La elevación induce un efecto coenoclínico sobre la densidad poblacional y ésta a su vez, se correlaciona negativamente con la producción de estructuras reproductivas y el tama o de los adultos, evidenciándose un efecto inequívoco del fenómeno de la densodependencia sobre el potencial biótico de la población. En la zona intermedia del gradiente, la densidad poblacional es máxima, pero los tama os corporales son reducidos, la producción de estructuras reproductivas es mínima y la probabilidad de que un juvenil alcance edades avanzadas es baja. Evidentemente, esta elevación intermedia estaría presentando condiciones ecológicas favorables para el establecimiento y supervivencia de plántulas, lo que a largo plazo conlleva a un aumento de la densidad poblacional. Se propone que las generalizaciones de otros autores acerca de la influencia de la elevación sobre la autoecología de estas plantas son inverosímiles y limitadas, ya que la historia particular de vida y disturbio del páramo y los aislamientos espaciales, ecológicos y genéticos, son factores explicativos que no pueden aislarse del contexto. Paralelamente, la población se ajustó al modelo demográfico logarítmico, revelando su temprano estado de regeneración frente a la última quema ocurrida en el 2003, y la similitud de las curvas de supervivencia entre todas las elevaciones, probó una alta estabilidad demográfica. Some autoecological features of Espeletia pycnophylla ssp. angelensis Cuatrec. such as its demographic structure, population density, spatial pattern of dispersion, production of reproductive structures, adult morphometry and survivorship, were studied in an altitudinal gradient on a dry paramo of Nari o (Colombia). Hypothesis proposed by other authors about a linear effect caused by the elevation on these variables were completely rejected. The elevation induces an ecoclinal effect on population density, and this density correlates negatively with both production of reproductive structures and adult sizes. These results elucidate an unequivocal effect of density-dependen
ESTUDIO COMPARATIVO DE LOS COMPUESTOS VOLáTILES DE TRES VARIEDADES DE GUAYABA BLANCA (Psidium guajava L.) DURANTE SU MADURACIóN
Cantillo,Johanna; Sinuco,Diana C.; Solarte,María E.; Melgarejo,Luz M.;
Revista Colombiana de Química , 2011,
Abstract: the composition of volatile compounds during guava ripening (psidium guajava l.) has been an aspect broadly studied. however, the changes of these compounds in representative white varieties from colombia, like guavatá victoria (gv), regional blanca (rb) and ráquira (rq) are still unknown. comparison of the aroma profiles was done using heads-pace-solid phase micro extraction (hs-spme) for three white guava varieties from the suárez river basin region (santander, colombia) during three maturation stages (green, half-ripened and ripen). the three varieties presented a similar behavior, the c6- aldehydes (hexanal, (z)-3-hexenal and (e)-2-hexenal) characterized for a green note diminished during ripening, while ester amounts (hexyl acetate and (z)-3-hexenyl acetate) increase, producing sweet and fruity notes characteristics in a ripen fruit. the acids, furanics and alcohol compounds are present in low proportions at the three stages. through hs-spme analysis, we established a relation between c6-aldehy-des compounds transformation, responsible of the green note, into analogue esters that contribute to the fruity note during the ripening process.
Resultados de la aplicación de braquiterapia en el melanoma de coroides
Aragonés Cruz,Belmary; Marín Valdés,María E;
Revista Cubana de Oftalmolog?-a , 2006,
Abstract: with the objective of assessing the long-term results of episcleral iridium-192 implant brachytherapy for choroidal melanoma, a prospective/retrospective clinical study was performed, which covered 30 eyes for a period of 10 years. as a consequence, a reduction of the tumor volume was observed in 95,6 % of cases, vision was preserved or improved in 63,3 % of treated eyes. retinal detachment and neovascular glaucoma were the most frequent complications. metastasis was detected in 3,3 % but no one died. only 13,3 % required enucleation due to a relapse. it was concluded that iridium-102 brachytherapy constitutes an efficient therapeutic variant, with good results in survival (100%), and eye ball and visual acuity preservation, which provides the patient with better quality of life
Resultados de la aplicación de braquiterapia en el melanoma de coroides Results of the use of brachytherapy in choroidal melanoma
Belmary Aragonés Cruz,María E Marín Valdés
Revista Cubana de Oftalmolog?-a , 2006,
Abstract: Con el objetivo de evaluar los resultados a largo plazo de la braquiterapia con implante epiescleral de iridio 192 en el melanoma de coroides, se realizó un estudio clínico retrospectivo-prospectivo, que abarcó un período de 10 a os, cuyo universo estuvo constituido por 30 ojos de 30 pacientes (cada uno de ellos aportó un ojo). Como resultado se observó una reducción del volumen tumoral en el 96,6 % de los casos. Conservó o mejoró la visión en 63,3 % de los casos. El desprendimiento de retina y el glaucoma neovascular fueron las complicaciones más frecuentes. Se detectó metástasis en 3,3 % de los casos, relacionados con el tumor, pero no se detectaron fallecimientos. Solo 13,3 % requirió enucleación por recaída. Por lo cual se pudo concluir que la braquiterapia con iridio 192 constituye una variante terapéutica y eficaz, con buenos resultados de supervivencia (100 %), de conservación del globo ocular y de la agudeza visual, que ofrece al paciente mejor calidad de vida With the objective of assessing the long-term results of episcleral iridium-192 implant brachytherapy for choroidal melanoma, a prospective/retrospective clinical study was performed, which covered 30 eyes for a period of 10 years. As a consequence, a reduction of the tumor volume was observed in 95,6 % of cases, Vision was preserved or improved in 63,3 % of treated eyes. Retinal detachment and neovascular glaucoma were the most frequent complications. Metastasis was detected in 3,3 % but no one died. Only 13,3 % required enucleation due to a relapse. It was concluded that iridium-102 brachytherapy constitutes an efficient therapeutic variant, with good results in survival (100%), and eye ball and visual acuity preservation, which provides the patient with better quality of life
Estudio de algunos factores maternos asociados con el bajo peso Study of some maternal factors associated with low birth weight
Yolanda Cruz Oviedo,María E. Arrastía álvarez,Rosa Sánchez Salazar,Miguel Lugones Botell
Revista Cubana de Obstetricia y Ginecolog?-a , 1998,
Abstract:
Angiofibroma nasofaríngeo juvenil: A propósito de un caso
Vento Cruz,Sergio J; Ramos Cruz,Milagros; Castro Pérez,Fidel; Clemente Rodríguez,María E;
Revista de Ciencias M??dicas de Pinar del R?-o , 2009,
Abstract: a caucasian-16 year old boy presenting a relative health history was assessed at an out-patient office in "pepe portilla" pediatric hospital. pinar del rio. cuba. it was observed a nasal obstruction with 2 years of evolution being associated to light epitasis in the last months as well as rhinolalia, night snores, sleeping apnea and a good general condition. at physical examination it was found a non- ulcer and hard - reddish mass occupying the whole nasopharynx. later it was performed a cta that showed a juvenile nasopharyngeal angiofibroma and the surgical procedure was carried out. authors present the experiences obtained with this case and make a review of the medical literature giving emphasis to diagnosis and treatment.
Modalidad quirúrgica transnasal en la rinosinusitis maxilar crónica infantil: Hospital Pediátrico "Pepe Portilla" (2005-2007)
Vento Cruz,Sergio J; Ramos Cruz,Milagros; Castro Pérez,Fidel; Clemente Rodríguez,María E;
Revista de Ciencias M??dicas de Pinar del R?-o , 2008,
Abstract: a descriptive, explicative, longitudinal and ambispective study aimed at exposing the advantages that the endonasal approach has (transnasal antrotomy) in the surgical approach of the maxillary sinus was performed in 30 patients with a clinical and radiological diagnosis of chronic maxillary rhinosinusitis seen in the otolaryngology service in the "pepe portilla" pediatric hospital in pinar del rio between september 2005 and october 2007. the results obtained were compared to those obtained using the transcanine approach (caldwell-luc technique), used traditionally for defining which one offer more economic and social advantages for its continuous use. it was proved that both procedures are similarly useful in the surgical procedure of the chronic maxillary rhinosinusitis but being the transnasal antrotomy less complex as well as a shorter surgical time and a hospital stay. with this technique it was obtained a better postoperative evolution, a minimal use of drugs and a total absent of bad postoperative effects that the transcanine antrotomy has.
Dise?o de un medio de ense?anza, para el estudio de técnicas hemostáticas en sangramientos postonsilectomía
Vento Cruz,Sergio J; Ramos Cruz,Milagros; Clemente Rodríguez,María E; Pérez Pérez,Medardo;
Revista de Ciencias M??dicas de Pinar del R?-o , 2007,
Abstract: three otolaryngologists designed a teaching aid at "pepe portilla" provincial children teaching hospital in pinar del rio in 2006. it was shown by means of this model the different anatomical structures of the oro-pharynx and the behavior to be followed in presence of a bleeding in patients underwent a tonsillectomy. disposal and low cost materials were used for the design . a promotion of 100 percent was attained in students from the brigade 88 knowing the oropharyngeal anatomy as well as the techniques for the hemostasis in presence of bleeding in patients undergone a tonsillectomy.
Dise o de un medio de ense anza, para el estudio de técnicas hemostáticas en sangramientos postonsilectomía Design of a Teaching Aid in the Study of the Hemostatic Techniques in Post-tonsillectomy Bleeding
Sergio J Vento Cruz,Milagros Ramos Cruz,María E Clemente Rodríguez,Medardo Pérez Pérez
Revista de Ciencias M??dicas de Pinar del R?-o , 2007,
Abstract: Se confeccionó un medio de ense anza por tres especialistas de Otorrinolaringología del Hospital Pediátrico Provincial Docente "Pepe Portilla" de Pinar del Río en el a o 2006. Se lograron mostrar, mediante el uso de esta maqueta, las diferentes estructuras anatómicas de la orofaringe y la conducta a seguir ante el sangramiento en pacientes amigdalectomizados. Se utilizaron materiales desechables y de bajo costo para su dise o. Se obtuvo el 100 % de promoción en los estudiantes de la brigada # 88 con el aprendizaje de la anatomía orofaríngea y el dominio de las técnicas para hacer hemostasia en el sangramiento de pacientes tonsilectomizados. Three otolaryngologists designed a teaching aid at "Pepe Portilla" Provincial Children Teaching Hospital in Pinar del Rio in 2006. It was shown by means of this model the different anatomical structures of the oro-pharynx and the behavior to be followed in presence of a bleeding in patients underwent a tonsillectomy. Disposal and low cost materials were used for the design . A promotion of 100 percent was attained in students from the Brigade 88 knowing the oropharyngeal anatomy as well as the techniques for the hemostasis in presence of bleeding in patients undergone a tonsillectomy.
Page 1 /573484
Display every page Item


Home
Copyright © 2008-2017 Open Access Library. All rights reserved.