Tisanópteros asociados a plantaciones citrícolas de Jujuy y Salta

La diversidad de especies de tisanópteros que afectan la calidad de los frutos de cítricos varía en los diferentes países. En la Argentina, fueron citadas Frankliniella rodeos Bagnall (Nasca, et al., 1981); Chaetanaphothrips orchidii Moulton (Goane y Pereyra, 2007) en Tucumán asociada a frutos de limón; Frankliniella shultzei Trybom; el género Frankliniella Karny y Heliothrips haemorrhoidalis (Bouche) (Armella et al., 2009), en cítricos y frutales tropicales de Jujuy, causando daños en forma de cicatrices de tamaño variable y depresiones.EEA YutoFil: Tapia, Silvia Norma. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Yuto; Argentina. Universidad Nacional de Jujuy. Facultad de Ciencias Agrarias; ArgentinaFil: Zamar, María Inés. Universidad Nacional de Jujuy. Instituto de Biología de la Altura; ArgentinaFil: Ventura, L.I. Universidad Nacional de Jujuy. Facultad de Ciencias Agrarias; ArgentinaFil: Ochoa, María Soledad. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Yuto; ArgentinaFil: Ortiz, Jorge Daniel. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Yuto; Argentin

Eficiencia en el uso del agua del cultivo de soja a través de ambientes con productividad contrastante de Argentina

El incremento productivo de la Argentina de las últimas décadas respondió fuertemente al aumento en la superficie cultivada, principalmente hacia áreas consideradas marginales, y la sustitución de cultivos invernales por estivales (estivalización; Viglizzo et al., 2007)EEA PergaminoFil: Riglos, M.M. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria San Luis; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Mercau, Jorge Luis. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria San Luis. Agencia de Extensión Rural San Luis; ArgentinaFil: Mayer, Luis Ignacio. NIDERA. Desarrollo de Productos; ArgentinaFil: Haro Juarez, Ricardo Javier. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Manfredi; ArgentinaFil: Severina, Ignacio. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Manfredi; ArgentinaFil: Cirilo, Alfredo Gabriel. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Pergamino. Ecofisiología; ArgentinaFil: Otegui, María Elena. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Pergamino. Ecofisiología; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad de Buenos Aires. Facultad de Agronomía; Argentin

Dose volume histogram constraints in patients with soft tissue sarcomas of the extremities and the superficial trunk treated with surgery and perioperative HDR brachytherapy

Background: Wound healing complications (WHC), osteoradionecrosis (ORN), and nerve damage (ND) are common adverse effects in adult patients with soft tissue sarcomas of the extremities and the superficial trunk treated with surgery and perioperative high dose rate brachytherapy (PHDRB) alone or combined with external beam radiotherapy (EBRT). Rationale: Analysis of the treatment factors contributing to these complications can potentially minimize their occurrence and severity. Patients: A total of 169 patients enrolled in two parallel prospective studies were included in this analysis. Previously Unirradiated cases (Group 1; n = 139) were treated with surgical resection, 16–24 Gy of PHDRB and 45 Gy of EBRT. Adjuvant chemotherapy was given to selected patients with high-grade tumors. Previously irradiated cases (Group 2; n = 30) were treated with surgical resection and 32– 40 Gy of PHDRB without further EBRT. Methods: Patient factors, tumor factors, surgical factors, PHDRB factors and EBRT factors were analyzed using Cox univariate and multivariate analysis. Results: In Previously Unirradiated cases, WHC, ORN and ND occurred in 38.8%, 5.0% and 19.4%. Multivariate analysis indicated that WHC increased with CTV size (p = 0.02) and CTV2cm3 Physical dose (p = 0.02). ORN increased with Bone2cm3 EQD2 67 Gy (p = 0.01) and ND was more frequent in patients with TV100 DVH-based dose (tissue volume encompassed by the 100% isodose) 84 Gy (p < 0.01). In Previously Irradiated cases, WHC, ORN and ND occurred in 63.3%, 3.3% and 23.3%. Multivariate analysis showed that WHC was more frequent in patients with Skin2cm3 Lifetime EQD2 84 Gy (p = 0.01) and ND was more frequent after CTVD90 Physical Doses 40 Gy (p < 0.01). Conclusions: WHC in Previously Unirradiated patients can be minimized by using a more conservative CTV definition together with a meticulous implant technique and planning aimed to minimize hyperdose CTV2cm3 areas. In Previously Irradiated patients WHC may be mimimized considering Lifetime EQD2 Skin2cm3 doses. ORN can be reduced by using the Bone2cm3 EQD2 constraint. ND occurs more frequently in patients with large tumors receiving high treated volume doses, but no specific constraints can be recommended due to the lack of peripheral nerve definition during brachytherapy planning

Radioterapia estereotáctica

La radioterapia con técnica estereotáctica es una modalidad de radioterapia externa que utiliza un sistema de coordenadas tridimensionales independientes del paciente para la localización precisa de la lesión. También se caracteriza porque los haces de irradiación son altamente conformados, precisos y convergentes sobre la lesión que hacen posible la administración de dosis muy altas de radioterapia sin incrementar la irradiación de los órganos o estructuras sanas adyacentes. Cuando el procedimiento se realiza en una sesión de tratamiento se denomina radiocirugía y si se administra en varias sesiones se denomina radioterapia estereotáctica. Se precisa de sistemas de fijación e inmovilización del paciente especiales (guías o marcos estereotácticos) y dispositivos de radioterapia capaces de generar haces muy conformados (acelerador lineal, gammaknife, cyberknife, tomoterapia, ciclotrones). La radioterapia estereotáctica moderna utiliza marcas radioopacas intratumorales o sistemas de imágenes de TAC incluidos en el dispositivo de irradiación, que permiten una precisa localización de las lesiones móviles en cada sesión de tratamiento. Además, los avances tecnológicos hacen posible coordinar los movimientos de la lesión en la respiración con la unidad de radioterapia (gaiting y tracking) de forma que pueden estrecharse al máximo los márgenes y por lo tanto excluir un mayor volumen de tejido sano La radiocirugía está indicada principalmente en lesiones cerebrales benignas o malignas menores de 3-4 centímetros (malformaciones arteriovenosas, neurinomas, meningiomas, metástasis cerebrales) y la radioterapia estereotáctica se administra fundamentalmente en tumores de localización extracraneal que requieran una alta conformación y precisión como cáncer precoz de pulmón inoperable y metástasis hepáticas.Stereotactic radiotherapy is an external radiation modality that uses a system of three dimensional references independent of the patient to achive a precise location of the lesion. Stereotactic radiotherapy generate highly conformal, precisely focused radiation beams to administer very high doses of radiation without increasing the radiation to healthy surrounding organs or structures. When the procedure is carried out in one treatment session the procedure is termed radiosurgery, and when the treatment is administered in several fractions, the radiation modality is termed stereotactic radiotherapy. Special systems of patient immobilization (guides or stereotactic frames) are required together with radiotherapy devices capable of generating conformal beams (lineal accelerator, gammaknife, cyberknife, tomotherapy, cyclotrons). Modern stereotactic radiotherapy techniques employ intratumoural radio-opaque fiducials or CT image systems included in the irradiation device, which make possible a precise location of mobile lesions in each treatment session. Besides, technological advances permit breathing synchronized radiation (gating and tracking) for maximum tightening of margins and excluding a greater volume of healthy tissue. Radiosurgery is mainly indicated in benign or malign cerebral lesions less than 3-4 centimetres (arteriovenous malformations, neurinomas, meningiomas, cerebral metastases) and stereotactic radiotherapy is basically administered in tumours of extracraneal location that require high conformation and precision, such as inoperable early lung cancer and liver metastasis

Measurement of the View the tt production cross-section using eμ events with b-tagged jets in pp collisions at √s = 13 TeV with the ATLAS detector

This paper describes a measurement of the inclusive top quark pair production cross-section (σtt¯) with a data sample of 3.2 fb−1 of proton–proton collisions at a centre-of-mass energy of √s = 13 TeV, collected in 2015 by the ATLAS detector at the LHC. This measurement uses events with an opposite-charge electron–muon pair in the final state. Jets containing b-quarks are tagged using an algorithm based on track impact parameters and reconstructed secondary vertices. The numbers of events with exactly one and exactly two b-tagged jets are counted and used to determine simultaneously σtt¯ and the efficiency to reconstruct and b-tag a jet from a top quark decay, thereby minimising the associated systematic uncertainties. The cross-section is measured to be: σtt¯ = 818 ± 8 (stat) ± 27 (syst) ± 19 (lumi) ± 12 (beam) pb, where the four uncertainties arise from data statistics, experimental and theoretical systematic effects, the integrated luminosity and the LHC beam energy, giving a total relative uncertainty of 4.4%. The result is consistent with theoretical QCD calculations at next-to-next-to-leading order. A fiducial measurement corresponding to the experimental acceptance of the leptons is also presented

Search for TeV-scale gravity signatures in high-mass final states with leptons and jets with the ATLAS detector at sqrt [ s ] = 13TeV

A search for physics beyond the Standard Model, in final states with at least one high transverse momentum charged lepton (electron or muon) and two additional high transverse momentum leptons or jets, is performed using 3.2 fb−1 of proton–proton collision data recorded by the ATLAS detector at the Large Hadron Collider in 2015 at √s = 13 TeV. The upper end of the distribution of the scalar sum of the transverse momenta of leptons and jets is sensitive to the production of high-mass objects. No excess of events beyond Standard Model predictions is observed. Exclusion limits are set for models of microscopic black holes with two to six extra dimensions