Higgs Boson Phenomenology in a Simple Model with Vector Resonances

In this paper we consider a simple scenario where the Higgs boson and two vector resonances are supposed to arise from a new strong interacting sector. We use the ATLAS measurements of the dijet spectrum to set limits on the masses of the resonances. Additionally we compute the Higgs boson decay to two photons and found, when compare to the Standard Model prediction, a small excess which is compatible with ATLAS measurements. Finally we make prediction for Higgs-strahlung processes for the LHC running at 14 TeV

Southern Annular Mode-like changes in southwestern Patagonia at centennial timescales over the last three millennia

Late twentieth-century instrumental records reveal a persistent southward shift of the Southern Westerly Winds during austral summer and autumn associated with a positive trend of the Southern Annular Mode (SAM) and contemporaneous with glacial recession, steady increases in atmospheric temperatures and CO2 concentrations at a global scale. However, despite the clear importance of the SAM in the modern/future climate, very little is known regarding its behaviour during pre-Industrial times. Here we present a stratigraphic record from Lago Cipreses (51S), southwestern Patagonia, that reveals recurrent B200-year long dry/warm phases over the last three millennia, which we interpret as positive SAM-like states. These correspond in timing with the Industrial revolution, the Mediaeval Climate Anomaly, the Roman and Late Bronze Age Warm Periods and alternate with cold/wet multicentennial phases in European palaeoclimate records. We conclude that SAM-like changes at centennial timescales in southwestern Patagonia represent in-phase interhemispheric coupling of palaeoclimate over the last 3,000 years through atmospheric teleconnections.Fil: Moreno, Patricio. Universidad de Chile; ChileFil: Vilanova, Isabel. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales "Bernardino Rivadavia"; ArgentinaFil: Villa Martinez, R.. Universidad de Chile; ChileFil: Garreaud, R. D.. Universidad de Chile; ChileFil: Rojas, M.. Universidad de Chile; ChileFil: De Pol Holz, R.. Universidad de Chile; Chil

Acantosis nigricans asociado a malignidad

La Acantosis nigricans se caracteriza por presentar hiperpigmentación, hiperqueratosis y presencia de papilomatosis Múltiple que afectan en forma simétrica principalmente los pliegues cutáneos. Según etiología se clasifica en dos grandes grupos: benigna y Maligna. En el presente artículo describimos el caso de una Mujer de 42 años afectada de un carcinoma pobremente diferenciado tipo difuso en estómago y paralelamente desarrollo Acantosis Nigricans. Se revisa además la fisiopatología y el posible mecanismo patogénico común de estas manifestaciones dermatológicas en relación a la neoplasia interna

Synchronous or collision solid neoplasms and lymphomas: A systematic review of 308 case reports.

The presence of a lymphoma associated with a solid synchronous neoplasm or collision neoplasm has been rarely in the literature, and a detailed characterization of these cases is lacking to date. To describe the main clinicopathological features of synchronous/collision tumors. A systematic search in PubMed, Scielo, and Virtual Health Library literature databases for cases or case series of synchronous or collision lymphoma and other solid neoplasms reported up to March 2021 was performed. Three reviewers independently screened the literature, extracted data, and assessed the quality of the included studies. The systematic review was performed following the Preferred Reporting Items for Systematic Meta-Analyses guidelines. Mean age of patients was 62.9 years (52.9% men). A total of 308 cases were included (62% synchronous and 38% collision). The most frequent location of both synchronous and collision tumors was the gastrointestinal tract with the most common solid neoplasm being adenocarcinoma, and the most frequent lymphoma diffuse large B-cell lymphoma (21.7%) and mucosa-associated lymphoid tissue lymphoma (20.4%). Of the total number of mucosa-associated lymphoid tissue lymphomas and gastric adenocarcinomas, the presence of Helicobacter pylori infection was documented in 47.3% of them. Only 2% of all cases had a previous history of lymphoma. Thus, in most cases (98%), lymphoma was discovery incidentally. In addition, nodal lymphoma was associated with metastasis in 29 (9.4%) cases as collision tumor, most commonly (90%) in locoregional lymph nodes of the solid neoplasm. The frequent association of some type of B-cell lymphoma and adenocarcinoma in synchronous/collision tumors of the gastrointestinal tract points to common pathogenic mechanisms in both neoplasia, particularly related to chronic inflammation in this location. In most cases, lymphoma identified in locoregional lymph nodes or distant of a carcinoma seems to represent an incidental finding during the carcinoma diagnostic/therapeutic approach. A synergy between carcinoma and lymphoma (involving inflammation and immunosuppression mechanisms) may favor tumor progression and dissemination. A better understating of the interactions lymphoma/carcinoma in the setting of synchronous/collision tumors may help to improve patient management and prognosis

Predicting the growth of lettuce from soil infrared reflectance spectra: the potential for crop management

How well could one predict the growth of a leafy crop from reflectance spectra from the soil and how might a grower manage the crop in the light of those predictions? Two fields in the Cambridgeshire Fens in eastern England where farmers grow lettuce commercially were studied. Topsoil was sampled and analysed for various nutrients, particle-size distribution, and organic carbon concentration. Crop measurements (lettuce diameter) were derived by photogrammetry. Reflectance spectra were obtained in the laboratory from the soil in the near- and mid-infrared ranges, and these were used to predict crop performance by partial least squares regression (PLSR). Individual soil properties were also predicted from the spectra by PLSR. These estimated soil properties were used to predict lettuce diameter with a linear model (LM) and a linear mixed model (LMM): considering differences between lettuce varieties and the spatial correlation between data points. The PLSR predictions of the soil properties and lettuce diameter were close to observed values, with the latter showing a mean squared error (MSE) of 3.90 cm2 for Field 1 and 6.87 cm2 for Field 2. Prediction of lettuce diameter from the estimated soil properties with the LMs gave somewhat poorer results than those that used the soil spectra as predictor variables (difference in MSE for Field 1: 0.69 cm2 and Field 2: 2.12 cm2). Predictions from LMMs were more precise than those from the raw spectra (by PLSR alone) with a difference in mean squared error (MSE) of 2.12 cm2 for Field 1 and of 5.10 cm2 for Field 2. All model predictions improved when the effects of variety were taken into account. Predictions from the reflectance spectra, via the estimation of soil properties, can enable growers to decide what treatments to apply to grow lettuce and how to vary their treatments within their fields to maximize the net profit from the crop

INTERRUPTION OF GESTATION IN A BITCH USING A COMBINED TREATMENT OF CLOPROSTENOL AND CABERGOLINE

Se evaluó la efectividad de un tratamiento combinado de cloprostenol y cabergolina como método de interrupción de la gestación en hembras caninas. Se describe el caso de una perra Bulldog Inglés con gestación estimada de 30 días. Cada 24 horas se aplicó 5 μ/kg de cabergolina, vía oral, seguido a los 30 min de 1μ/kg de cloprostenol, vía subcutánea. Se evaluaron constantes fisiológicas, efectos post administración y evolución ecográfica de la gestación; asimismo, se determinó la concentración de progesterona sérica utilizando un kit comercial cuantitativo. Cambios en las vesículas gestacionales se observaron en el día 3 del tratamiento, y en el día 4 se evidenció una frecuencia cardíaca disminuida (<180 lpm), y una expulsión fetal horas más tarde. El examen ecográfico del día 5 mostró ausencia de vesículas gestacionales y fetos. La progesterona sérica en el día 3 fue de 1 a 2.5 ng/ml, incompatible con la mantención de la gestación y en el día 5 fue de <1 ng/ml. Los resultados permiten confirmar la efectividad del protocolo usado para interrumpir gestaciones en caninos, destacando el corto tiempo del tratamiento (4 días).The effectiveness of a combined treatment of cloprostenol and cabergoline was evaluated for interruption of gestation in bitches. A clinical experience is reported in an English bulldog bitch with a gestation of 30 days. The treatment was administrated every 24 hours and consisted in 5 μg/kg of cabergoline, orally, followed 30 minutes later by 1 μg/kg of cloprostenol, via subcutaneous. Physiological constants, effects post administration, and ecographic evolution of the gestation was evaluated. Also, progesterone concentration was determined in two blood samples using a quantitative commercial kit. Changes in gestational vesicles were observed at day 3 of treatment, and a lower cardiac frequency (<180 bpm) were recorded on day 4. A fetal expulsion occurred few hours later. Ultrasound on day 5 showed absence of vesicles and fetuses. Serum progesterone concentration on day 3 was 1 to 2.5 ng/ml, incompatible with the maintenance of gestation, and on day 5 was <1 ng/ml. The results allowed confirming the effectiveness of this protocol to interrupt gestations in bitches, highlighting the short duration of the treatment (4 days)

On the removal of s-triazine herbicides from waters using commercial low-cost granular carbons

The adsorption capacities of three low-cost granular active carbons, used in a water treatment facility for the removal of the triazine herbicides propazine, prometryn and prometon, was evaluated. Kinetic studies showed that the three carbon samples used could be suitable in practice for the treatment of moderate contents of the herbicides in contaminated waters. The apparent adsorption rate constants were calculated. Equilibrium studies showed that the data fit the Frumkin isotherm. The results show that in the adsorption process there are repulsive lateral interactions that depend mainly on the adsorbate molecules rather than the nature or distribution of the adsorption sites. Such lateral interactions seem to be established mainly between the isopropyl groups of adjacent molecules, being of the same order for the three molecules