170,765 research outputs found
Sistemas petroleros y tipos de entrampamientos en la cuenca neuquina
Full text linkCon casi un siglo de historia exploratoria y productiva de hidrocarburos, la Cuenca Neuquina contiene cinco sistemas petroleros de diferente importancia, distribuidos en una columna sedimentaria mesozoica que ha documentado ciclos transgresivos y regresivos responsables de la distribución de rocas generadoras, reservorios y sellos. La incorporación de los nuevos aportes tecnológicos fue paralela al conocimiento de los sistemas depositacionales que permitieron delinear la exploración en la cuenca. En la actualidad si bien es reconocida como una cuenca madura en la prospección de acumulaciones convencionales, guarda aún enormes perspectivas en la búsqueda de hidrocarburos en los reservorios no tradicionales.With almost a century of exploratory and productive history in hydrocarbons,
Neuquén Basin contains five petroleum systems of different importance distributed in a mesozoic sedimentary column that has shown transgressive and regressive cycles that are responsible for the distribution of source rocks, reservoirs and seals. The incorporation of new technology was parallel to the improvement of the knowledge of the depositional systems that helped outline
the exploration in the basin. Nowadays, it is known as a prospective mature basin nevertheless has enormous perspectives in non traditional reservoirs.Fil: Vergani, Gustavo D. PLUSPETROL SA; Argentina.Fil: Arregui, Carlos. Petrobrás Argentina SA; Argentina.Fil: Carbone, Osvaldo. Petrobrás Argentina SA; Argentina.Fil: Vallés, Jorge M. Universidad Nacional del Comahue. Facultad de Ingeniería; Argentina
Contexto tectosedimentario
Full text linkLa Cuenca Neuquina es un depocentro subandino localizado en el sur de Sudamérica con aproximadamente 7.000 m de sedimentos Jurásicos y Cretácicos. Su historia deposicional es una sucesión cíclica de eventos marinos alternantes con etapas de continentalización. Durante el Cretácico Superior comenzó el alzamiento de la cordillera de los Andes y se produjo la desvinculación definitiva con el proto-océano Pacífico. El complejo mosaico de terrenos de basamento y las alteraciones producidas en la interacción de las placas durante el Mesozoico da a la cuenca una impronta que se refleja en la dinámica del relleno sedimentario.Tectosedimentary context.- The Neuquén Basin is a subandean depocenter located in southern South América with almost 7.000 m of Jurassic and Cretáceous sediments. Its depositional history is a cyclical succesion of marine incursions alternating with continental episodes. During Upper Cretaceous the rising of the Andes Chain started, and the definite closure of the Pacific marine
connection ended the history of the basin as a depocenter. The complex basement components arrangement, and the changes produced in Mesozoic times with the plate interactions gives to the basin an imprint that is reflected in the sediment infill dynamic.Fil: Arregui, Carlos. Petrobrás Argentina SA; Argentina.Fil: Carbone, Osvaldo. Petrobrás Argentina SA; Argentina.Fil: Leanza, Héctor A. Servicio Geológico Minero Argentino; Argentina.Fil: Leanza, Héctor A. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina.Fil: Vallés, Jorge M. Universidad Nacional del Comahue. Facultad de Ingeniería; Argentina
Replication Data and Online Appendix for: Do Member States' Permanent Representations matter for their bargaining success? Evidence from the EU Council of Ministers (2004-2019)
No full textThe files contain the final version of the replication material and the operational dataset employed in the relative research article: Perarnaud C, Arregui J. Do Member States’ Permanent Representations matter for their bargaining success? Evidence from the EU Council of Ministers (2004-2019). Special Issue, Journal of European Public Policy. In press 202
El grupo lotena (jurásico medio-tardío) en la Cuenca Neuquina
Full text linkEl Grupo Lotena (Calloviano Medio a Oxfordiano Tardío) constituye el segundo ciclo sedimentario del relleno de la Cuenca Neuquina, conocido también como Ciclo Loteniano – Chacayano. Está constituido por sedimentos silicoclásticos (Fm. Lotena), carbonatos (Fms. La Manga y Barda Negra) y evaporitas (Fm. Auquilco). Ocupa una posición paleogeográfica más restringida que los ciclos infra- y suprayacentes y sus espesores también resultan menores. Se inicia luego de una reactivación tectónica (movimientos Intracallovianos) y culmina con otro reordenamiento de los campos de esfuerzo que antecede al diastrofismo Intramálmico.
Presenta una evolución con depósitos clásticos continentales en la base que se expanden paulatinamente alternando con areniscas marinas litorales. A medida que progresa el relleno y disminuye el aporte comienzan a desarrollarse plataformas carbonáticas de ambientes marinos normales. Finaliza con un período de restricción producto de un brusco descenso del nivel de base, donde se depositan importantes espesores de evaporitas (principalmente yeso y anhidrita).The Lotena Group (Middle-Late Jurassic) in the Neuquén Basin.- The Lotena Group (Middle Callovian to Late Oxfordian) constitutes the second sedimentary cycle of the Neuquén Basin filling, also known as Loteniano-Chacayano Cycle. It is formed by siliciclastic sediments (Lotena Fm.), carbonates (La Manga and Barda Negra Fms.) and evaporites (Auquilco Fm.). It occupies a more restricted paleogeographical position than the upper and lower cycles, displaying as well a thinner thickness. It begins after a tectonic reactivation (Intracallovian movements) and ends with another reorganization of the stress fields that precedes the Intramalmic diastrophism. It represents an evolution with continental clastic deposits at the base that gradually expands, alternating
with coastal marine sandstones. As the filling progresses and the supply decreases, carbonate shelfs of normal marine enviroments begin to be developed. It ends with a period of restriction due to an abrupt fall in the base level, where thick deposits of evaporites (mainly gypsum and anhydrite) were settled.Fil: Arregui, Carlos. Petrobrás Argentina SA; Argentina.Fil: Carbone, Osvaldo. Petrobrás Argentina SA; Argentina.Fil: Sattler, Federico. Petrobrás Argentina SA; Argentina.Fil: Vallés, Jorge M. Universidad Nacional del Comahue. Facultad de Ingeniería; Argentina
Libros comentados por varios autores
No full textR. Brunner, R. Kausen & M. Titze (Eds.): Worterbuch der Individualpsychologie (R. L.) 58.- Centro de Rehabilitación de Alcohólicos (Ed.). Memorias del III Congreso Iberoamericano sobre Alcohol y Alcoholismo (C. Sogi) 59.- T. Crooks, R. Bartus, S. Ferris & S. Gershon (Eds.): Treatment Development strategies for Alzheimer's Disease (A. Arregui) 59.- Ch. Desrouesne: Practique Neurologique (L. Trelles) 60.- U. Geuter (Ed.): Daten zur geschichte der Deutschen Psychologie (Vol. 1: Psychologische Institute, Fachgesellschaften, Fachzeitschriften und Serien, Biographien, Emigranten, 1879-1945) (R. Leon) 60. - Roger Guerra·Garcia (Ed.). Problemas poblacionales peruanas II. (c. Sogi) 61.- L. J. Pongralz: Problemgeschichte der Psychologie (R. Leon) 62.- Humberto Roselli: La Locura de Epifanio y otros ensayos (J. Mariategui) 63.- D. J. Weatherall, J. C. Ledingham & D. A. Warrell (Eds.). Oxford Textbook of Medicine (L Trelles) 64.</jats:p
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Some young adults with cystic fibrosis‐related diabetes may safely stop insulin without any adverse clinical sequelae
No full textEl grupo Cuyo (jurásico temprano-medio) en la Cuenca Neuquina
No full textEl Grupo Cuyo, comprende el primer ciclo sedimentario marino que se depositó en la Cuenca Neuquina en un lapso de tiempo que abarca desde el Sinemuriano-Hettangiano en el sur de la provincia de Mendoza y el Pliensbachiano-Toarciano en la provincia del Neuquén, hasta el Calloviano Medio. Es de particular relevancia ya que inicia la historia de la cuenca como receptora de sedimentos
marinos y por otra parte constituye el intervalo que comenzó a investigarse con éxito, en las primeras perforaciones en búsqueda de hidrocarburos en lo que posteriormente se convirtió en la principal comarca productora del país. Está integrado por un conjunto de rocas clásticas que representan ambientes marinos distales (Fm. Molles), litorales (Fm. Lajas), continentales (Fms. Challacó y Punta Rosada) y evaporitas (Fm. Tábanos). Representa un ciclo completo transgresivo – regresivo (segundo orden) que posee oscilaciones menores de avances y retrocesos de la línea de costa que permitieron su subdivisión en 7 secuencias depositacionales de tercer orden. La influencia del comportamiento tectónico de los bordes de la cuenca produjo una importante progradación que se inicia en el Aaleniano - Bajociano en la región sur y sudeste mientras que en el sur de Mendoza, continúa una situación transgresiva por lo menos hasta el Bathoniano. Culmina con un evento evaporítico desarrollado en el sector interno de la cuenca
que marca la máxima retracción marina previa a la reactivación tectónica que produce la discordancia Intracalloviana.The Cuyo Group (Early-Middle Jurassic) in the Neuquén Basin .- The Cuyo Group constitutes the first marine sedimentary cycle which was deposited in the Neuquén Basin in a period of time that spans from the Sinemurian-Hettangian in southern Mendoza and the Pliensbachian-Toarcian in Neuquén, up to the Mid-Callovian. It has a particular importance since it represents the beginning of the
basin history as a sedimentary recipient and, on the other hand, it constitutes the interval that was studied successfully on the first drillings searching for hydrocarbons, in what was later to become the major productive region in the country. It is formed by a group of clastic rocks that represent distal marine (Molles Fm.), coastal (Lajas Fm.) and continental environments (Challacó and Punta Rosada Fms.), ending with evaporitic rocks (Tábanos Fm.). It represents a complete transgressive-regressive (second order) cycle that shows minor oscillations of advances and retreats of the shoreline. In turn this allowed its subdivision in seven third order depositional sequences. The influence of the tectonic behavior of the basin borders produced an important progradation that begins in the Aalenian-Bajocian on the southern and southeastern margins, whereas in southern of Mendoza, a transgressive situation continues at least until
the Bathonian. It ends with an evaporitic event developed in the inner part of the basin that represents the greatest marine retraction previous to the tectonic reactivation which produces the Intracallovian unconformity.Fil: Arregui, Carlos. Petrobrás Argentina SA; Argentina.Fil: Carbone, Osvaldo. Petrobrás Argentina SA; Argentina.Fil: Martínez, Ricardo. Petrobrás Argentina SA; Argentina.Fil: Vallés, Jorge M. Universidad Nacional del Comahue. Facultad de Ingeniería; Argentina
Mitomycin C in highly myopic eyes - Author reply
No full textOphthalmology. 2005 Feb;112(2):208-18; discussion 219.
Mitomycin C modulation of corneal wound healing after photorefractive keratectomy in highly myopic eyes.
Gambato C, Ghirlando A, Moretto E, Busato F, Midena E.
SourceRefractive Surgery Service and Antimetabolite Therapy Research Unit, Department of Ophthalmology, University of Padova, Padova, Italy.
Abstract
PURPOSE: To evaluate the role of topical mitomycin C in corneal wound healing (CWH) after photorefractive keratectomy (PRK) in highly myopic eyes.
DESIGN: Prospective, double-masked, randomized clinical trial.
PARTICIPANTS: Seventy-two eyes of 36 patients affected by high (>7 diopters) myopia.
METHODS: In each patient, one eye was randomly assigned to PRK with intraoperative topical 0.02% mitomycin C application, and the fellow eye was treated with a placebo. Postoperatively, mitomycin C-treated eyes received artificial tears (3 times daily, tapered in 3 months), whereas the fellow eye was treated with fluorometholone sodium 2% and artificial tears (3 times daily, tapered in 3 months).
MAIN OUTCOME MEASURES: Uncorrected visual acuity (UCVA) and best-corrected visual acuity (BCVA), contrast sensitivity, manifest refraction, and biomicroscopy. Contrast sensitivity was determined using the Pelli-Robson chart. Corneal confocal microscopy documented CWH.
RESULTS: Mean follow-up was 18 months (range, 12-36). No side effects or toxic effects were documented. At 12-month follow-up examination, UCVAs (logarithm of the minimum angle of resolution) were 0.4+/-0.48 and 0.5+/-0.53 (P = .03) in mitomycin C-treated eyes and corticosteroid-treated eyes, respectively. At 1 year, corneal haze developed in 20% of corticosteroid-treated eyes, versus 0% of mitomycin C-treated eyes. At 12, 24, and 36 months, corneal confocal microscopy showed activated keratocytes and extracellular matrix significantly more evident in untreated eyes (Ps = 0.004, 0.024, and 0.046, respectively).
CONCLUSION: Topical intraoperative application of 0.02% mitomycin C can reduce haze formation in highly myopic eyes undergoing PRK.
Comment in
Ophthalmology. 2006 Feb;113(2):357; author reply 357-8
Discussion of Simulating Nonresidential Water Demand with a Stochastic End-Use Model by E. J. M. Blokker, E. J. Pieterse-Quirijns, J. H. G. Vreeburg, and J. C. van Dijk
No full textArregui De La Cruz, F.; Soriano Olivares, J.; Cobacho Jordán, R. (2013). Discussion of Simulating Nonresidential Water Demand with a Stochastic End-Use Model by E. J. M. Blokker, E. J. Pieterse-Quirijns, J. H. G. Vreeburg, and J. C. van Dijk. Journal of Water Resources Planning and Management. 3(139):345-346. doi:10.1061/(ASCE)WR.1943-5452.0000277S345346313
- …
