Los suelos y la vegetación del área de influencia de las obras de Yacyreta, provincia de Corrientes, Argentina

The main objective of the present, work was to survey and to map the soils and vegetation of the area of influence of the Yacyreta dam, under construction. A total of 840.000 hs. were surveyed at a semi detailed scale (1:50.000). Geographical coordinates are from South to North: S 28°00’ - S 27°15’ and from East to West: W 55°55* -W 53°55’.. The information provided in the original work, not published, is distributed in 6 tomes included in 12 volumes as follows:Tome I -Antecedents, climate and soils (4 volumes)Tome II -Veg'etation (2 volumes)Tome III -Soil productivity (1 volume)Tome IV -Geomorphology and hydrology of 100.000 ha (1 volume)Tome V -Aptitude for irrigation of 100.000 ha (1 volume)Tome VI -Soil charts and thematicmaps (3 volumes) In this publication the following maps and charts are presented at 1:50.000 scale: a) Basic soil maps; b) Potential aptitude for irrigation, and c) Geomorphological landforms. Other maps at 1:200.000 scale are also included as follows: d) Vegetation; e) Soil regions; f) Actual use; g) Land use capability; h) Land aptitude for annual and perennial crops; i) Taxonomical soil great groups; and j) Excitangeable aluminium. The work resulted from an agreement signed in March 1981 by the Government of the Province Corrientes and the Federal Council of Investments, to be carried out by the Natural Resources Department of the Experimental Station Corrientes of the National Institute of Agricultural Technology (INTA). The complete information may be consulted at:  1. - Experimental Station of Corrientes. INTA. (C.C. 57 -3400- Corrientes)2. - Instituto Correntino del Agua (Water Institute of Corrientes)(San Martín 2250 -3400- Corrientes)3. - Federal Council of Investments(San Martín 871 -5o piso- 1004 - Buenos Aires)4. - College of Agronomy Sciences (National University of North-East) (Sargento Cabral 2139 -3400- Corrientes)El objetivo principal de este trabajo es el inventario y evaluación de los récursos suelos y vegetación del área de influencia de la Presa de Yacyretá, a nivel de semidetalle, escala 1:50.000, en una superficie de 840.000 ha. El área recorre de sur a norte más de 30 km, cuyos puntos extremos se encuentran a los 27°15' y 28° de latitud sur.y de este a oeste 300 km (55°55' de longitud oeste del meridiano de Greenwich). Se obtuvieron Cartas de Suelos, de aptitud potencial para riego y de geomorfología, escala 1:50.000. Mapas temáticos a escala 1:200.000; de vegetación; regiones de suelos; uso actual de la tierra; capacidad de uso; aptitud de las tierras para cultivos anuales y perennes; grandes grupos de suelos y de aluminio intercambiable. La Memoria contiene los resultados relacionados a las cartas y mapas citados anteriormente, distribuidos en 6 tomos, compuestos de 12 volúmenes, a saber:Tomo I -Antecedentes, climas y suelos (4 volúmenes)Tomo II -Vegetación (2 volúmenes)Tomo III -Productividad de los suelos (1 volumen)Tomo IV -Geomorfología e hidrología de 100.000 ha (1 volumen)Tomo V -Aptitud para riego de 100.000 ha (1 volumen)Tomo VI -Cartas de suelos y mapas temáticos (3 volúmenes) El trabajo es el resultado de la firma de un convenio entre el Gobierno Provincial y el Consejo Federal de Inversiones, en el mes de marzo de 1981, encomendándose la realización del estudio a la Estación Experimental del INTA - Corrientes, a través del Dpto. de Recursos Naturales. Esta Memoria no fue publicada,por consiguiente la información detallada puede ser consultada en: Biblioteca INTA Corrientes (C.C.57-3400- Corrientes); Facultad de Ciencias Agrarias (UNNE) (Sgto.Cabral 2139 -3400- Corrientes); Instituto Correntino del Agua (Gobierno de la Provincia de Corrientes) (San Martín 2250 -3400- Corrientes) y Consejo Federal de Inversiones (San Martín 871 -5o piso- 1004 - Buenos Aires

Tecnología de fertilización azufrada en la Región Pampeana Argentina : una revisión

61-73La frecuencia de ocurrencia de deficiencias de azufre (S) en cultivos de grano se incrementó a nivel mundial, incluyendo la Región Pampeana argentina, localizada en Sudamérica. El objetivo del trabajo es realizar una revisión de la literatura científica sobre fertilización azufrada en la Región Pampeana, con énfasis en aspectos tecnológicos. La adopción de la fertilización azufrada creció marcadamente en ésta región y simultáneamente aumentó la cantidad de publicaciones científicas en el tema. Sin embargo, existe una brecha de conocimiento sobre la fertilización con azufre elemental (AE) y su efectividad agronómica relativa a fuentes azufradas solubles. Los fertilizantes sulfatados sólidos son, con creces, las fuentes de S más utilizadas en la Región Pampeana aunque la aplicación de fuentes líquidas se incrementó en los últimos tiempos. En términos generales, se ha reportado similar efectividad agronómica entre fuentes sulfatadas. Asimismo, se ha observado similar efectividad agronómica entre el AE micronizado y fuentes sulfatadas en diferentes cultivos, con la excepción de condiciones sitio-específicas donde las fuentes sulfatadas pueden presentar una mejor performance. Esta revisión contribuye a sintetizar el conocimiento vigente sobre tecnología de fertilización azufrada y puede resultar de interés para establecer necesidades de investigación en este tema

The diverse meteorology of Jezero crater over the first 250 sols of Perseverance on Mars

NASA’s Perseverance rover’s Mars Environmental Dynamics Analyzer is collecting data at Jezero crater, characterizing the physical processes in the lowest layer of the Martian atmosphere. Here we present measurements from the instrument’s first 250 sols of operation, revealing a spatially and temporally variable meteorology at Jezero. We find that temperature measurements at four heights capture the response of the atmospheric surface layer to multiple phenomena. We observe the transition from a stable night-time thermal inversion to a daytime, highly turbulent convective regime, with large vertical thermal gradients. Measurement of multiple daily optical depths suggests aerosol concentrations are higher in the morning than in the afternoon. Measured wind patterns are driven mainly by local topography, with a small contribution from regional winds. Daily and seasonal variability of relative humidity shows a complex hydrologic cycle. These observations suggest that changes in some local surface properties, such as surface albedo and thermal inertia, play an influential role. On a larger scale, surface pressure measurements show typical signatures of gravity waves and baroclinic eddies in a part of the seasonal cycle previously characterized as low wave activity. These observations, both combined and simultaneous, unveil the diversity of processes driving change on today’s Martian surface at Jezero crater.This work has been funded by the Spanish Ministry of Economy and Competitiveness, through the projects no. ESP2014-54256-C4- 1-R (also -2-R, -3-R and -4-R); Ministry of Science, Innovation and Universities, projects no. ESP2016-79612-C3-1-R (also -2-R and -3-R); Ministry of Science and Innovation/State Agency of Research (10.13039/501100011033), projects no. ESP2016-80320-C2-1-R, RTI2018-098728-B-C31 (also -C32 and -C33), RTI2018-099825-B-C31, PID2019-109467GB-I00 and PRE2020-092562; Instituto Nacional de Técnica Aeroespacial; Ministry of Science and Innovation’s Centre for the Development of Industrial Technology; Spanish State Research Agency (AEI) Project MDM-2017-0737 Unidad de Excelencia “María de Maeztu”—Centro de Astrobiología; Grupos Gobierno Vasco IT1366- 19; and European Research Council Consolidator Grant no 818602. The US co-authors performed their work under sponsorship from NASA’s Mars 2020 project, from the Game Changing Development programme within the Space Technology Mission Directorate and from the Human Exploration and Operations Directorate. Part of this research was carried out at the Jet Propulsion Laboratory, California Institute of Technology, under a contract with the National Aeronautics and Space Administration (80NM0018D0004). G.M. acknowledges JPL funding from USRA Contract Number 1638782. A.G.F. is supported by the European Research Council, Consolidator Grant no. 818602.Peer ReviewedPostprint (published version

ERK5/BMK1 is a novel target of the tumor suppressor VHL: implication in clear cell renal carcinoma

Hi ha quatre pàgines de material suplementari sense numeracióExtracellular signal-regulated kinase 5 (ERK5), also known as big mitogen-activated protein kinase (MAPK) 1, is implicated in a wide range of biologic processes, which include proliferation or vascularization. Here, we show that ERK5 is degraded through the ubiquitin-proteasome system, in a process mediated by the tumor suppressor von Hippel-Lindau (VHL) gene, through a prolyl hydroxylation-dependent mechanism. Our conclusions derive from transient transfection assays in Cos7 cells, as well as the study of endogenous ERK5 in different experimental systems such as MCF7, HMEC, or Caki-2 cell lines. In fact, the specific knockdown of ERK5 in pVHL-negative cell lines promotes a decrease in proliferation and migration, supporting the role of this MAPK in cellular transformation. Furthermore, in a short series of fresh samples from human clear cell renal cell carcinoma, high levels of ERK5 correlate with more aggressive and metastatic stages of the disease. Therefore, our results provide new biochemical data suggesting that ERK5 is a novel target of the tumor suppressor VHL, opening a new field of research on the role of ERK5 in renal carcinomas

E1a is an exogenous in vivo tumour suppressor

The E1a gene from adenovirus has become a major tool in cancer research. Since the discovery of E1a, it has been proposed to be an oncogene, becoming a key element in the model of cooperation between oncogenes. However, E1a's in vivo behaviour is consistent with a tumour suppressor gene, due to the block/delay observed in different xenograft models. To clarify this interesting controversy, we have evaluated the effect of the E1a 13s isoform from adenovirus 5 in vivo. Initially, a conventional xenograft approach was performed using previously unreported HCT116 and B16-F10 cells, showing a clear anti-tumour effect regardless of the mouse's immunological background (immunosuppressed/immunocompetent). Next, we engineered a transgenic mouse model in which inducible E1a 13s expression was under the control of cytokeratin 5 to avoid side effects during embryonic development. Our results show that E1a is able to block chemical skin carcinogenesis, showing an anti-tumour effect. The present report demonstrates the in vivo anti-tumour effect of E1a, showing that the in vitro oncogenic role of E1a cannot be extrapolated in vivo, supporting its future use in gene therapy approaches.This work was supported by grants from Fundación Leticia Castillejo Castillo and MINECO (SAF 2015 64215-R) and from JCCM (PPII10-0141-0404) to RSP. F. Cimas was supported by Fundación Leticia Castillejo Castillo and Cátedra Enresa. RSP research institution received support from the European Community through the regional development funding programme (FEDER).Peer reviewe

ERK5/BMK1 is a novel target of the tumor suppressor VHL: implication in clear cell renal carcinoma

Hi ha quatre pàgines de material suplementari sense numeracióExtracellular signal-regulated kinase 5 (ERK5), also known as big mitogen-activated protein kinase (MAPK) 1, is implicated in a wide range of biologic processes, which include proliferation or vascularization. Here, we show that ERK5 is degraded through the ubiquitin-proteasome system, in a process mediated by the tumor suppressor von Hippel-Lindau (VHL) gene, through a prolyl hydroxylation-dependent mechanism. Our conclusions derive from transient transfection assays in Cos7 cells, as well as the study of endogenous ERK5 in different experimental systems such as MCF7, HMEC, or Caki-2 cell lines. In fact, the specific knockdown of ERK5 in pVHL-negative cell lines promotes a decrease in proliferation and migration, supporting the role of this MAPK in cellular transformation. Furthermore, in a short series of fresh samples from human clear cell renal cell carcinoma, high levels of ERK5 correlate with more aggressive and metastatic stages of the disease. Therefore, our results provide new biochemical data suggesting that ERK5 is a novel target of the tumor suppressor VHL, opening a new field of research on the role of ERK5 in renal carcinomas