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Search Results: 1 - 10 of 12834 matches for " Marcelo; Arga?araz "
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Presencia de Diaphorina citri (Hemiptera: Psyllidae) en el Noroeste Argentino (NOA) Record of Diaphorina citri (Hemiptera: Psyllidae) in North West Argentina
Lucrecia Augier,Gerardo Gastaminza,Marcelo Lizondo,Manuel Argaaraz
Revista de la Sociedad Entomol?3gica Argentina , 2006,
Abstract: Se amplía la distribución de Diaphorina citri Kuwayama (Hemiptera: Psyllidae) para el Noroeste Argentino. The distribution of Diaphorina citri Kuwayama (Hemiptera: Psyllidae) is expanded to North West Argentina.
Presencia de Diaphorina citri (Hemiptera: Psyllidae) en el Noroeste Argentino (NOA)
Augier,Lucrecia; Gastaminza,Gerardo; Lizondo,Marcelo; Argaaraz,Manuel; Willink,Eduardo;
Revista de la Sociedad Entomol?3gica Argentina , 2006,
Abstract: the distribution of diaphorina citri kuwayama (hemiptera: psyllidae) is expanded to north west argentina.
Una aproximación a la lógica subjetiva de la Modernidad líquida: El caso de las minorías sexuales
Carlos Alberto Argaaraz
Revista Latinoamericana de Estudios Sobre Cuerpos, Emociones y Sociedad (RELACES) , 2011,
Abstract: Este artículo es un estudio de la subjetividad, particularmente, la de las minorías sexuales, en la Modernidad líquida. La noción de cuerpo resulta significativa, entendido como sustrato de la subjetividad. Asimismo, se utilizan conceptos provenientes de la Teoría Queer y de los Estudios Poscoloniales para analizar la dinámica sociológica del tema en cuestión. Los fenómenos socio-emocionales vinculados a las minorías sexuales, tal el caso de la homofobia, la lesbofobia y la transfobia, serán abordados como pensamientos encarnados. El propósito de este artículo es pensar las diferencias subjetivas en las minorías sexuales, entre la Modernidad sólida, cuyo dispositivo metáfora es el campo de concentración y, la Modernidad líquida, cuyo dispositivo metáfora es el programa mediático Gran Hermano.
Contribución de las áreas verdes urbanas a la regulación del balance de agua en Santiago del Estero, Argentina
Argaaraz,Juan Pablo; Lorenz,Guido;
Bosque (Valdivia) , 2010, DOI: 10.4067/S0717-92002010000300007
Abstract: the soil’s role in water flow partitioning is considerably modified in urban environments due to pavement and buildings, which interfere with the infiltration process. in this context, green areas gain importance as water infiltration spots. the aim of this research was to evaluate the contribution of soils of francisco de aguirre park to water flow partitioning in santiago del estero city. to fulfill this, hydraulic soil properties such as sorptivity and hydraulic conductivity were determined in situ with a tension disc infiltrometer. results indicated that different uses of the park affect significantly the hydraulic properties: areas used in a controlled way (using footpaths) exhibited high hydraulic conductivity values, whereas areas under intensive use (sports practicing, vehicle traffic) showed low values of this property. finally, the comparison of soil’s water infiltration capacities with intensity-duration-frequency curves of precipitation indicated that the soils of the park effectively contribute to water soil partitioning in santiago del estero city.
Contribución de las áreas verdes urbanas a la regulación del balance de agua en Santiago del Estero, Argentina Urban green areas contribution to water soil partitioning in Santiago del Estero City, Argentina
Juan Pablo Argaaraz,Guido Lorenz
Bosque (Valdivia) , 2010,
Abstract: El rol del suelo como regulador del balance de agua se encuentra considerablemente alterado en ambientes urbanos a causa del pavimento y las edificaciones, que interfieren con el proceso de infiltración. En este contexto, las áreas verdes adquieren importancia al actuar como focos de absorción de agua. El objetivo del presente trabajo fue evaluar la contribución de los suelos del parque Francisco de Aguirre a la regulación del balance de agua de la ciudad de Santiago del Estero, Argentina. Para ello se determinaron las propiedades hidráulicas del suelo, sorptividad y conductividad hidráulica, a partir de ensayos de infiltración in situ, utilizando un infiltrómetro de disco de tensión. Los resultados indicaron que los diferentes usos del parque inciden significativamente en los valores de las propiedades hidráulicas: mientras que las zonas utilizadas de manera ordenada (respetando senderos y canteros) presentaron valores de conductividad hidráulica altos, aquellos sectores sometidos a usos intensivos (prácticas deportivas, tránsito vehicular) tuvieron valores bajos de esta propiedad. Finalmente, la comparación de las capacidades de captación de agua con las curvas de intensidad-duración-recurrencia de las lluvias indicaron que los suelos del parque contribuyen efectivamente a la regulación del balance de agua en la ciudad de Santiago del Estero. The soil’s role in water flow partitioning is considerably modified in urban environments due to pavement and buildings, which interfere with the infiltration process. In this context, green areas gain importance as water infiltration spots. The aim of this research was to evaluate the contribution of soils of Francisco de Aguirre Park to water flow partitioning in Santiago del Estero city. To fulfill this, hydraulic soil properties such as sorptivity and hydraulic conductivity were determined in situ with a tension disc infiltrometer. Results indicated that different uses of the park affect significantly the hydraulic properties: areas used in a controlled way (using footpaths) exhibited high hydraulic conductivity values, whereas areas under intensive use (sports practicing, vehicle traffic) showed low values of this property. Finally, the comparison of soil’s water infiltration capacities with intensity-duration-frequency curves of precipitation indicated that the soils of the park effectively contribute to water soil partitioning in Santiago del Estero city.
Patologia vascular en pacientes menores de un a?o
Zuccaro,Graciela; Argaaraz,Romina; Villasante,Francisco; Ceciliano,Alejandro;
Revista argentina de neurocirug?-a , 2009,
Abstract: objective. to analyze our experience in neurosurgical vascular disease in patients under one year. materials and methods. between 1/1/89 and 1/6/09 we treated at the department of neurosurgery of the hospital nacional de pediatría juan p. garrahan 235 patients with vascular malformation of the central nervous system. of these 19 (n = 19; 8%) were infants under one year, 11 were males and 8 females, mean age at diagnosis 4.5 months (range from prenatal to 1 year). we evaluated all charts and neuroradiologic studies of each patient. results. all patients were studied with initial ct scan except one patient with vein of galen aneurysmal malformation (vgam) who was diagnosed antenatal by ultrasound. the types of lesions were 6 vgam (4 choroidal type and 2 mural type), 6 arteriovenous malformations (avm), 2 pial arteriovenous fistulas (1 brain and 1 spinal), 1 spinal dural arteriovenous fistula, 1 cavernoma, 1 aneurysm and 2 embryologic dural sinus malformations at the posterior fossa. conclusion. it is remarkable variability and complexity of vascular malformations of the central nervous system in the first year of life. it is necessary to integrate the endovascular neurosurgical team, not only for diagnosis but also to complement or facilitate the treatment of any of theses vascular disease. the most frequent vascular malformations in our group were the vgam and the avm followed by av fistulas.
Patologia vascular en pacientes menores de un a o
Graciela Zuccaro,Romina Argaaraz,Francisco Villasante,Alejandro Ceciliano
Revista Argentina de Neurocirugía , 2009,
Abstract: Objetivo. Analizar nuestra experiencia en patología neuroquirúrgica vascular en los pacientes menores de un a o. Material y método. Entre el 1/1/89 y el 1/6/09 se trataron en el Servicio de Neurocirugía del Hospital Nacional de Pediatría Juan P. Garrahan 235 pacientes con malformación vascular del SNC. De ellos 19 (8%) eran menores de un a o;11 fueron varones y 8 mujeres, con una edad media de 4,5 meses al diagnóstico, en un rango desde prenatal a 1 a o. Se analizaron las historias clínicas y los estudios neurradiológicos de cada uno de ellos. Resultados. Todos los pacientes fueron estudiados con TAC inicial excepto las malformaciones aneurismáticas de la vena de Galeno (MAVG) que se diagnosticaron en un principio, con ecografía. En 16/19 pacientes se realizó angiografía digital cerebral, y en uno de los casos se efectuó angiografía espinal, hallándose la malformación a ese nivel. Los tipos de lesiones halladas fueron: 6 MAVG (4 coroideas y 2 murales), 6 malformaciones arteriovenosas (MAV), 2 fístulas arteriovenosas (A-V) piales (1 cerebral y 1 medular), 1 fístula A-V medular, 1 cavernoma, 1 aneurisma sacular y 2 malformaciones embrionarias en fosa posterior. Conclusión. Es remarcable la variabilidad y complejidad de las malformaciones vasculares del SNC en el primer a o de vida. Es necesaria la integración del equipo endovascular al neuroquirúrgico, no sólo para el diagnóstico, sino también para completar o facilitar el tratamiento de alguna de estas lesiones. Las malformaciónes vasculares más frecuentes en este grupo son la MAVG y las MAV , seguidas de las fístulas A-V. Objective. To analyze our experience in neurosurgical vascular disease in patients under one year. Materials and Methods. Between 1/1/89 and 1/6/09 we treated at the Department of Neurosurgery of the Hospital Nacional de Pediatría Juan P. Garrahan 235 patients with vascular malformation of the central nervous system. Of these 19 (n = 19; 8%) were infants under one year, 11 were males and 8 females, mean age at diagnosis 4.5 months (range from prenatal to 1 year). We evaluated all charts and neuroradiologic studies of each patient. Results. All patients were studied with initial CT scan except one patient with Vein of Galen Aneurysmal Malformation (VGAM) who was diagnosed antenatal by ultrasound. The types of lesions were 6 VGAM (4 choroidal type and 2 mural type), 6 Arteriovenous Malformations (AVM), 2 Pial Arteriovenous Fistulas (1 brain and 1 spinal), 1 spinal Dural Arteriovenous Fistula, 1 Cavernoma, 1 Aneurysm and 2 Embryologic Dural Sinus Malformations at the posterior fossa. Conc
RNA fingerprinting using RAP-PCR identifies an EBAF homologue mRNA differentially expressed in rat oviduct
Valdecantos,Pablo A.; Argaaraz,Martín E.; Abate,Carlos M.; Miceli,Dora C.;
Biocell , 2004,
Abstract: as a step towards the identification of genes preferentially expressed in the oviduct during early rat embryo development, we isolated a cdna fragment (pr14) by using rna arbitrarily primed pcr (rap-pcr), being its expression restricted to oviduct and uterus; its mrna is mainly expressed in oviduct during late luteal phase and early pregnancy. this fragment is 100% identical to a rat dna sequence (accession no. nw_047400) downstream the terminal exon of a rattus norvegicus gene (locus link accession no. loc289316) similar to ebaf (endometrial bleeding-associated factor), a novel member of the transforming growth factor superfamily. northern analyses showed that this sequence hybridizes with 2.9 kb and 4.1 kb mrnas in early pregnant rat oviducts. however, only the 4.1 kb mrna was detected in the oviduct of non-pregnant rats, showing an increase from proestrus to diestrus. the expression of this oviduct-uterus specific mrna suggests that the products of this gene may play a role in the oviductal reproductive process.
Caracterización citomorfomérica de Anabaena circinalis (Cyanophyta) en una proliferación masiva en el embalse Paso de Las Piedras (Provincia de Buenos Aires, Argentina)
Argaaraz Bonini,Gimena; Parodi,Elisa R.; Cáceres,Eduardo J.;
Bolet?-n de la Sociedad Argentina de Bot??nica , 2005,
Abstract: the principal goal of the work was to make a statistical analysis of the morphology of individuals of anabaena circinalis growing in a bloom in embalse paso de las piedras (provincia de buenos aires, argentina), identified by a gene probe for this species. our results suggest that 1) it is possible to characterise individuals of a. circinalis growing in eutrophic condition, by using statistical parameters of the vegetative cells dimensions, 2) the criterion based on akinete morphology should not be used for characterization given the no maturation of akinetes in eutrophic conditions and the trend to morphological uniformity between the vegetative cells and immature akinetes, and 3) spherical heterocyst and vegetative cells can be discriminated by size but not by shape, whereas both can be differentiated from ovoidal akinetes. the variance analysis of the length of vegetative cells indicates all trichomes belong to the same species.
Hematomas intraparenquimatosos sin causa aparente en pediatría
del Rio,Ramiro J.; Argaaraz,Romina; Requejo,Flavio; Zuccaro,Graciela;
Revista argentina de neurocirug?-a , 2009,
Abstract: objective. spontaneous intracerebral hemorrhage (ich) in pediatric population has many causes. some patients remain non diagnosed in spite of being fully checked. our objetive is to analyze those patients whose etiology could not be found. material ando method. from march 2006 to april 2009 we studied 39 patients with ich . trauma and coagulation disorders were excluded. ct scan was performed to diagnose the bleeding, mri and at least two digital subtraction angiography (dsa) were the methods of diagnosis. results. thirty-nine patients presented ich. twenty presented avm, five aneurysm, one tumor, three dural sinus thrombosis. in 4 females and 6 males (ages 2 months to12 years) no etiology could be found. six patients had headache, four sensory loss and two seizures. the cerebellar hemisphere was involved in two patients, basal ganglia in two, thalamus in one and five were subcortical located. six presented intraventricular haemorrhage, and needed external ventricular drainage. six patients underwent clot removal because of mass effect. all patients survived. four remained with hemiparesia. coclusion. in 25% of patients with ich no etiology could be found in spite of being fully checked. the majority of them were between 6 and 12 years old. there were no children over 12 years. there were no deaths in this serie; therefore early surgery due to increased icp seems to have a favorable outcome.
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