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Search Results: 1 - 10 of 42 matches for " Ortego "
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Nieto Nafría, J.M. & C. Favret. 2011. Registers of family-group and genus-group taxa of Aphidoidea / Registros de los taxones del nivel familia y del nivel género de Aphidoidea (Hemiptera, Sternorrhyncha). Universidad de León. León (Espa a) 465 pp. ISBN 978-84-9773-573-5
Jaime Ortego
Revista de la Sociedad Entomol?3gica Argentina , 2011,
Abstract:
The hard but necessary task of gathering order-one effect size indices in meta-analysis
Carmen Ortego,Juan Botella
Psicológica , 2010,
Abstract: El meta-análisis de estudios primarios con dise o de dos grupos y medidas en dos momentos debe emplear índices de tama o de efecto de orden uno. Especialmente si la asignación no es aleatoria, con dise os de grupo control no equivalente, las conclusiones alcanzadas pueden estar fuertemente sesgadas si sólo se incluyen las medidas post tratamiento. 109 estudios primarios incluidos en 4 meta-análisis fueron recopilados y se contactó con sus autores para pedirles los datos originales con fin de estimar los índices de orden uno. De este total sólo se consiguió 13 estudios primarios. Los resultados obtenidos con los datos originales fueron comparados con los estimados con los índices de orden cero y uno. A pesar de las dificultades para conseguir los datos, el peque o grupo de datos analizados mostró que si el meta-análisis se realizaba con índices de orden cero las conclusiones eran erróneas.
Primera cita de Essigella californica (Essig, 1909)(Hemiptera: Aphididae) en Argentina
Ortego,Jaime; Mier Durante,M. Pilar;
Revista de la Facultad de Ciencias Agrarias. Universidad Nacional de Cuyo , 2012,
Abstract: aphids were sampled on several pinus species in some localities of argentina. essigella californica was caught for the first time in argentina, in five provinces. aspects of its biology and distribution are presented. biological and morphologic aspects that allow to separate three genera of the tribe eulachnini (subfamily lachninae) present now in argentina: cinara, eulachnus and essigella) are provided.
Acyrthosiphon (A.) loti (Hemiptera: Aphididae) hallado sobre alfalfa en la Argentina
Ortego,Jaime; Mier Durante,Milagros P.;
Revista de la Sociedad Entomol?3gica Argentina , 2003,
Abstract: acyrthosiphon ( a. ) loti (theobald) (aphididae) has been found for the first time in argentina and south america, on cultivate lucerne ( medicago sativa l.) (fabaceae). this is the seventh aphid species recorded in argentina on lucerne. the peculiar characteristics of studied specimens are given. modifications to a previous identification key are presented.
Acyrthosiphon (A.) loti (Hemiptera: Aphididae) hallado sobre alfalfa en la Argentina Acyrthosiphon (A.) loti (Hemiptera: Aphididae) founded on Lucerne in Argentina
Jaime Ortego,Milagros P. Mier Durante
Revista de la Sociedad Entomol?3gica Argentina , 2003,
Abstract: Se informa del hallazgo por primera vez en la Argentina y en América del Sur de Acyrthosiphon ( A. ) loti (Theobald) (Aphididae), una especie de pulgón que puede colonizar fabáceas cultivadas, entre ellas la alfalfa ( Medicago sativa L.) Se comentan las peculiaridades de los ejemplares estudiados y se modifica una clave existente para separar las siete especies de pulgones halladas sobre esta especie de leguminosa en la Argentina. Acyrthosiphon ( A. ) loti (Theobald) (Aphididae) has been found for the first time in Argentina and South America, on cultivate lucerne ( Medicago sativa L.) (Fabaceae). This is the seventh aphid species recorded in Argentina on lucerne. The peculiar characteristics of studied specimens are given. Modifications to a previous identification key are presented.
Reciente introducción a la Argentina de Chaitophorus leucomelas (Hemiptera: Aphididae - Salicaceae) que afecta a los álamos
Jaime Ortego,O. Astorga,M. Sevilla
Multequina , 1999,
Abstract: Se informa por primera vez la presencia de Chaitophorus leucomelas Koch, 1854 en la Argentina, hallado sobre álamos en la provincia de Mendoza.
Nuevos registros y actualización de la lista faunística de los pulgones (Hemiptera: Aphididae) de la Argentina
Ortego,Jaime; Difabio,María E.; Mier Durante,M. Pilar;
Revista de la Sociedad Entomol?3gica Argentina , 2004,
Abstract: the aphid species hyalopteroides humilis (walker), melanaphis donacis (passerini), illinoia azaleae (mason), myzus hemerocallis takahashi and rhopalosiphoninus staphylleae (koch) are been recorded for first time from argentina. the first two of them are also new record from south america. the actualized argentinean aphid check-list is presented, and comments about several species are given. capitophorus hippophaes (walker), m. donacis and takecallis arundinariae (essig) are recorded for first time from chile.
Wave-height hazard analysis in Eastern Coast of Spain - Bayesian approach using generalized Pareto distribution
J. J. Egozcue, V. Pawlowsky-Glahn,M. I. Ortego
Advances in Geosciences (ADGEO) , 2005,
Abstract: Standard practice of wave-height hazard analysis often pays little attention to the uncertainty of assessed return periods and occurrence probabilities. This fact favors the opinion that, when large events happen, the hazard assessment should change accordingly. However, uncertainty of the hazard estimates is normally able to hide the effect of those large events. This is illustrated using data from the Mediterranean coast of Spain, where the last years have been extremely disastrous. Thus, it is possible to compare the hazard assessment based on data previous to those years with the analysis including them. With our approach, no significant change is detected when the statistical uncertainty is taken into account. The hazard analysis is carried out with a standard model. Time-occurrence of events is assumed Poisson distributed. The wave-height of each event is modelled as a random variable which upper tail follows a Generalized Pareto Distribution (GPD). Moreover, wave-heights are assumed independent from event to event and also independent of their occurrence in time. A threshold for excesses is assessed empirically. The other three parameters (Poisson rate, shape and scale parameters of GPD) are jointly estimated using Bayes' theorem. Prior distribution accounts for physical features of ocean waves in the Mediterranean sea and experience with these phenomena. Posterior distribution of the parameters allows to obtain posterior distributions of other derived parameters like occurrence probabilities and return periods. Predictives are also available. Computations are carried out using the program BGPE v2.0.
Nuevos registros y actualización de la lista faunística de los pulgones (Hemiptera: Aphididae) de la Argentina New records and actualized check list of aphids (Hemiptera: Aphididae) from Argentina
Jaime Ortego,María E. Difabio,M. Pilar Mier Durante
Revista de la Sociedad Entomol?3gica Argentina , 2004,
Abstract: Se citan por primera vez para la Argentina cinco especies de pulgones: Hyalopteroides humilis (Walker), Melanaphis donacis (Passerini), Illinoia azaleae (Mason), Myzus hemerocallis Takahashi y Rhopalosiphoninus staphylleae (Koch). Las dos primeras son también nuevas para América del Sur. Se presenta una lista actualizada de áfidos, con comentarios sobre varias especies. Se citan por primera vez para Chile tres especies: Capitophorus hippophaes (Walker), M. donacis y Takecallis arundinariae (Essig). The aphid species Hyalopteroides humilis (Walker), Melanaphis donacis (Passerini), Illinoia azaleae (Mason), Myzus hemerocallis Takahashi and Rhopalosiphoninus staphylleae (Koch) are been recorded for first time from Argentina. The first two of them are also new record from South America. The actualized Argentinean aphid check-list is presented, and comments about several species are given. Capitophorus hippophaes (Walker), M. donacis and Takecallis arundinariae (Essig) are recorded for first time from Chile.
Prognostic Value of Microvascular Density in Dukes A and B (T1–T4, N0, M0) Colorectal Carcinomas
Rafael Uribarrena A,Javier Ortego,Javier Fuentes,Nuria Raventós,Pilar Parra,Rafael Uribarrena E
Gastroenterology Research and Practice , 2009, DOI: 10.1155/2009/679830
Abstract: Background. Aproximatelly 30% of patients operated on for colorectal cancer (CRC), with an expectedly favourable prognosis (Dukes A-B/T1–T4, N0, M0) suffer recurrence and/or die. Method. In order to determine if tumor microvascular density (MVD) is a prognostic factor in CRC, samples from tumors of 104 Dukes A-B CRC patients were retrospectively studied. Immunohistochemistry was performed for anti-CD34 antibody to visualize tumor vascularisation. MVD was expressed as the total number of vessels and as the percentage of microvascular area. We calculated MVD with a morphometry program and performed descriptive, bivariate, and survival statistics. Results. The mean number of vessels was 37.37/200x field, and the mean vascular area was the 3.972%. 30% of the patients with <37 vessels/field, and 21% of the patients with >37 vessels/field, experienced recurrence/death. The 35% of patients with <4% of vascular area died following recurrence, compared with 14% of patients with ≥4% of vascular area. These differences in % of vascular area were statistically significant. Conclusion. MVD expressed as the total number of vessels had no a statistically significant influence on the evolution of CRC. However, neoplasias with a greater % of vascular were associated to a better outcome.
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