Nuevo registro de Leopardus tigrinus (Carnivora: Felidae) en la Reserva Forestal Protectora Bosque Oriental de Bogotá, Colombia

This note presents evidence of the presence of the oncilla at the southern end of the Bosque Oriental Forest Reserve in the city of Bogotá (Figure 1). This was recorded by means of a footprint in the Verjón Bajo village, belonging to the town of Chapinero, the rural area of the city. This path borders the Verjón Alto path, and the municipalities of La Calera and Choachí in the Department of Cundinamarca.En esta nota se presenta evidencia de la presencia de la oncilla en el extremo sur de la Reserva Forestal Bosque Oriental en la ciudad de Bogotá (Figura 1). Esta se registró por medio de una huella en la vereda Verjón Bajo, perteneciente a la localidad de Chapinero, zona rural de la ciudad. Esta vereda limita con la vereda Verjón Alto, y los municipios de La Calera y Choachí en el Departamento de Cundinamarca

Uso de hábitat por carnívoros en un sistema de ganadería extensiva silvopastoril (Córdoba, Colombia)

Biólogo (a)Pregrad

Inventario preliminar de mamíferos de las Reservas privadas Námaku y el Jardín de Las Delicias, estribaciones de la Sierra Nevada de Santa Marta, Colombia

The present study was carried out in two private reserves located in the department of Magdalena, in the eastern foothills of the Sierra Nevada de Santa Marta. The Námaku reserve (63 ha), located in the Minca district, Las Casitas village, is between 800 and 1100 meters above sea level and is characterized by presenting secondary Tropical Humid Forest with more than 20 years of recovery.El presente estudio se llevó a cabo en dos reservas privadas ubicadas en el departamento del Magdalena, en las estribaciones orientales de la Sierra Nevada de Santa Marta. La reserva Námaku (63 ha), situada en el corregimiento de Minca, vereda las Casitas, se encuentra entre los 800 y 1100 msnm y se caracteriza por presentar Bosque Húmedo Tropical secundario con más de 20 años de recuperación

Changes in anatomical and functional connectivity related to lower hippocampal volume

Anatomical 3D T1 weighted images have been widely used to assess the volume of subcortical structures. It has been demonstrated that volume loss of hippocampi, entorhinal cortex and amygdala are early biomarkers for the diagnosis of cognitive impairments and AD1. In this work, we investigate AD biomarkers based on brain connectivity. SC-FC differences have been reported between controls and patients at risk for AD2. We will try to anticipate to MCI or AD diagnoses by differentiating in a sample of healthy subjects, i.e. with no cognitive impairment, other than related to ageing, using as criterion of separation the normalized hippocampal volume (NHV). The sample is formed by volunteers in the Valleca?s Initiative, a longitudinal study evaluating normal ageing in a cohort of more than 600 healthy elder people (70-85 years). The prevalence of AD in people older than 65 years is 13%3 suggesting that a certain number of those subjects will develop AD in the next years. The subjects with lower NHV are more prone to have AD than subjects with higher NHV. Thus they are more likely to manifest connectivity patterns that can be considered as AD biomarkers

Primer registro confirmado de Oso Andino (Tremarctos ornatus: Ursidae) en la Serranía de San Lucas, Bolívar, Colombia.

In July 2011, in a biological expedition carried out by members of ProCAT Colombia, the video record of the presence of Andean Bear was obtained in the village of Villa Flor, rural area of the municipality of Santa Rosa del Sur (Bolívar), at an elevation 1043 meters above sea level (07 ° 56''26.8 '' N; 74 ° 13''41.5 W).En julio del 2011, en una expedición biológica realizada por miembros de ProCAT Colombia se obtuvo el registro en video de la presencia de Oso Andino en el corregimiento de Villa Flor, zona rural del municipio de Santa Rosa del Sur (Bolívar), a una elevación de 1043 msnm (07°56''26,8'' N; 74°13''41,5 W)

Planeación ambiental para la conservación de la biodiversidad en las áreas operativas de Ecopetrol: ventana Montes de María, Colosó, Sucre.

El estudio se realiza en la red hidrológica del municipio de Colosó y está determinada por la microcuenca del arroyo Colosó que tiene una extensión de 101,06 km con nacimiento en el arroyo Pitalcito a 600 msnm y desembocadura sobre el arroyo Pichilín (Alcaldía de Colosó 2008).BogotáPlaneación ambiental para la conservación de la biodiversidad en las áreas operativas de Ecopetro

Response of the transcription factor BABY BOOM of Arabidopsis thaliana L. in the formation of embryogenic calluses of cocoa leaves (Theobroma cacao L.)

Cocoa (Theobroma cacao L.) is one of the most important economic crops worldwide. The propagation of elite varieties of cocoa has been achieved through somatic embryogenesis, but still one of the main limitations is the low rates of embryo formation, which is a genotype-dependent trait. Manipulation of transcription factors (TFs) such as BABY BOOM (BBM) promotes the transition of cocoa somatic cells from the vegetative to the embryonic state. This work validated the use of clonal cocoa leaves cv. IMC-67 to induce somatic embryogenesis, overcoming their recalcitrant limitation with the help of the introduction of TF-BBM from Arabidopsis thaliana (AtBBM). The vectors were constructed by the Gateway system using the donor vector pENTR/D-TOPO and the expression vector pk7WG2. The overexpression vector pk7WG2:AtBBM was obtained, allowing successful transformation into Agrobacterium tumefaciens GV3101. The AtBBM gene was characterized (1755 base pairs), and its expression was observed in the formation of embryogenic calluses in cocoa leaves. Overexpression of AtBBM allowed the obtainment of a 92% response in the formation of embryogenic callus in cocoa leaves with Agrobacterium-mediated vacuum infiltration and overexpression of the pk7WG2:AtBBM vector. This high transformation efficiency reached with the insertion of the overexpression vector provides validation of transient response of the TF AtBBM in the formation of embryogenic calluses in cocoa leaves of the IMC-67 clone. Through this methodology, it is possible to continue with studies of gene overexpression, insertion, silencing, and gene editing in Peruvian cocoa

Measurement of the top quark forward-backward production asymmetry and the anomalous chromoelectric and chromomagnetic moments in pp collisions at √s = 13 TeV

Abstract The parton-level top quark (t) forward-backward asymmetry and the anomalous chromoelectric (d̂ t) and chromomagnetic (μ̂ t) moments have been measured using LHC pp collisions at a center-of-mass energy of 13 TeV, collected in the CMS detector in a data sample corresponding to an integrated luminosity of 35.9 fb−1. The linearized variable AFB(1) is used to approximate the asymmetry. Candidate t t ¯ events decaying to a muon or electron and jets in final states with low and high Lorentz boosts are selected and reconstructed using a fit of the kinematic distributions of the decay products to those expected for t t ¯ final states. The values found for the parameters are AFB(1)=0.048−0.087+0.095(stat)−0.029+0.020(syst),μ̂t=−0.024−0.009+0.013(stat)−0.011+0.016(syst), and a limit is placed on the magnitude of | d̂ t| < 0.03 at 95% confidence level. [Figure not available: see fulltext.

MUSiC : a model-unspecific search for new physics in proton-proton collisions at root s=13TeV

Results of the Model Unspecific Search in CMS (MUSiC), using proton-proton collision data recorded at the LHC at a centre-of-mass energy of 13 TeV, corresponding to an integrated luminosity of 35.9 fb(-1), are presented. The MUSiC analysis searches for anomalies that could be signatures of physics beyond the standard model. The analysis is based on the comparison of observed data with the standard model prediction, as determined from simulation, in several hundred final states and multiple kinematic distributions. Events containing at least one electron or muon are classified based on their final state topology, and an automated search algorithm surveys the observed data for deviations from the prediction. The sensitivity of the search is validated using multiple methods. No significant deviations from the predictions have been observed. For a wide range of final state topologies, agreement is found between the data and the standard model simulation. This analysis complements dedicated search analyses by significantly expanding the range of final states covered using a model independent approach with the largest data set to date to probe phase space regions beyond the reach of previous general searches.Peer reviewe

Measurement of prompt open-charm production cross sections in proton-proton collisions at root s=13 TeV

The production cross sections for prompt open-charm mesons in proton-proton collisions at a center-of-mass energy of 13TeV are reported. The measurement is performed using a data sample collected by the CMS experiment corresponding to an integrated luminosity of 29 nb(-1). The differential production cross sections of the D*(+/-), D-+/-, and D-0 ((D) over bar (0)) mesons are presented in ranges of transverse momentum and pseudorapidity 4 < p(T) < 100 GeV and vertical bar eta vertical bar < 2.1, respectively. The results are compared to several theoretical calculations and to previous measurements.Peer reviewe