1,080 research outputs found
Insights into Online microRNA Bioinformatics Tools
MicroRNAs (miRNAs) are members of the small non-coding RNA family regulating gene expression at the post-transcriptional level. MiRNAs have been found to have critical roles in various biological and pathological processes. Research in this field has significantly progressed, with increased recognition of the importance of miRNA regulation. As a result of the vast data and information available regarding miRNAs, numerous online tools have emerged to address various biological questions related to their function and influence across essential cellular processes. This review includes a brief introduction to available resources for an investigation covering aspects such as miRNA sequences, target prediction/validation, miRNAs associated with disease, pathway analysis and genetic variants within miRNAs
Adverse events of ERCP at San José Hospital of Bogotá (Colombia)
Endoscopic retrograde cholangiopancreatography (ERCP) has become the preferred treatment method for hepatobiliary and pancreatic disease. Despite technological progress this technique continues to account for the greatest morbidity and mortality caused by digestive endoscopic procedures. ERCP carries a risk of pancreatitis, perforation, hemorrhage, cholangitis and cardiopulmonary events occurring in upto 10% of patients in referral centers, implying a mortality of up to 1%, not including therapeutic failures or the need for re-intervention. A greater mortality rate has been demonstrated in prospective studies rather than in retrospective studies, but overall, the number of complications described in the literature is much lower than the number of complications that actually occur.
A descriptive prospective study was conducted at San José Hospital from April 1, 2006 to April 30, 2007 in patients who underwent an ERCP and had a 1-month follow-up. A total of 381 patients were included; 9 (2.3%) were excluded, and of the remaining 372 there was an overall success in 79.6% of cases, 8.3% had a second intervention, 7.6% developed complications (pancreatitis, perforation, hemorrhage, cholangitis, pain, intolerance to sedatives, and cardiopulmonary events), and 4.3% were failed ERCP studies. The mortality rate of the ERCP procedure was 0.8%. ERCP-related complications were determined at a teaching center, and this suggests the need to implement centers of excellence in order to improve the efficacy of the procedure
Self-trapping of a binary Bose-Einstein condensate induced by interspecies interaction
The problem of self-trapping of a Bose-Einstein condensate (BEC) and a binary
BEC in an optical lattice (OL) and double well (DW) is studied using the
mean-field Gross-Pitaevskii equation. For both DW and OL, permanent
self-trapping occurs in a window of the repulsive nonlinearity of the GP
equation: . In case of OL, the critical nonlinearities
and correspond to a window of chemical potentials
defining the band gap(s) of the periodic OL. The
permanent self-trapped BEC in an OL usually represents a breathing oscillation
of a stable stationary gap soliton. The permanent self-trapped BEC in a DW, on
the other hand, is a dynamically stabilized state without any stationary
counterpart. For a binary BEC with intraspecies nonlinearities outside this
window of nonlinearity, a permanent self trapping can be induced by tuning the
interspecies interaction such that the effective nonlinearities of the
components fall in the above window
Coastal erosion monitoring in Colombia: overview and study cases on Caribbean and Pacific coasts
Tourism is one of the fastest growing activities in Colombia; the coast represents the favourite
destination for both national and foreign visitors. However, coastal erosion is an actual
problem, with high erosive rates in some areas. This chapter shows a general overview
of the coastal erosion problem in Colombia and emphasizes the institutional framework
used in monitoring. Four study cases are included to present a wide diagnosis of relevant
erosive processes, both on Caribbean and Pacific coasts. Findings show erosive rates due
to human interventions in all coastal departments on the Caribbean Sea; highest values
were recorded in Cordoba (3.3 m/yr), Magdalena (5.3 m/yr) and La Guajira (3.2 m/yr). In
addition, monitoring of barrier islands indicated that erosive processes on the Pacific coast
are essentially due to natural phenomena, i.e. tsunami and El Niño events. In conclusion,
long-term coastal erosion monitoring is urgently required in order to make adequate decisions
and assess their effectiveness, with special concern to the correct location of coastal
infrastructure and the management of coastal risks
Hearing Loss after Discontinuing Secondary Prophylaxis for Cryptococcal Meningitis: Relapse or Immune Reconstitution?
Relapse and immune reconstitution syndrome are difficult to distinguish in HIV-infected patients treated with antiretroviral therapy (ART). We report on a 26-year-old HIV-infected male (CDC C3) with hearing loss on the right side 2 months after discontinuing secondary prophylaxis for cryptococcal meningitis. CD4 cell counts had increased from 32/µl to stable counts > 200/µl for the preceding 6 months on ART but HIV replication was not fully suppressed (7,000 copies/ml). Magnetic resonance imaging identified lesions at the origin of the right cranial nerve VIII. Lumbar puncture revealed monocytic pleocytosis, slightly increased protein, but normal glucose and lactate levels, negative microbiological studies. Fluconazole was restarted and a new ART regimen was started in order to fully suppress HIV replication. Clinical and radiological signs were reversible during follow-up, and secondary prophylaxis was stopped after 6 months without adverse events. We review 26 published cases of cryptococcal infections with immune reconstitution syndrome and highlight the distinguishing feature
Nuevos registros de Vespidae (Hymenoptera: Vespoidea) para la región de la Orinoquía colombiana
We analyzed 72 specimens from the Arauca (71) and Casanare (1) departments in the Orinoco region of Colombia. The specimens belong to 10 genera and 18 species of vespid wasps. Four species are reported for the first time for the region and 14 are new records for the Arauca department. There is a likely new record of Stenodynerus cf. australis for the Neotropical region.Analizamos 72 especímenes colectados de los departamentos de Arauca (71) y Casanare (1) en la región de la Orinoquía. Estos pertenecen a 10 géneros y 18 especies de avispas. Cuatro especies son nuevos registros para la región y 14 son nuevas para el departamento de Arauca. Hay también un posible nuevo registro de Stenodyneus cf. australis para la región Neotropical
Adición y sustracción de números enteros
Esta cartilla pertenece a la serie Unidades didácticas en Educación Matemática de “una empresa docente” (Facultad de Educación, Universidad de los Andes) y ediciones SM. Propone el diseño de una unidad didáctica con el que se busca contribuir al aprendizaje de la adición y sustracción de números enteros. Para ello, la cartilla presenta el material que el profesor de matemáticas de educación media requiere para implementar la unidad didáctica en el aula. La cartilla fue elaborada por el grupo 1 de la primera promoción de la maestría en Educación Matemática de la Universidad de los Andes. La cartilla se compone de cuatro partes. La primera presenta los aspectos que el profesor debe tener en cuenta antes de implementar las tareas propuestas en la unidad didáctica. La segunda contiene los objetivos de aprendizaje propuestos para los estudiantes y la metodología sugerida al profesor. La tercera describe la fundamentación y secuencia de tareas que conforman la unidad didáctica, e incluye el material fotocopiable para los estudiantes. Por último, se indican sugerencias para evaluar a los estudiantes y se presentan pautas para identi car su nivel de desempeño y determinar el logro de los objetivos de aprendizaje. La secuencia de tareas busca contribuir a que los estudiantes reconozcan y utilicen el vocabulario empleado en un enunciado que involucre adición y sustracción de números enteros; resuelvan tareas matemáticas al atender a las relaciones y propiedades de la adición y la sustracción de los números enteros, y explicar cada paso de la resolución; e interpreten y resuelvan problemas en diferentes situaciones de la vida real que involucren la adición y sustracción de números enteros. Las tareas están elaboradas para ser implementadas con estudiantes de grado séptimo de educación básica. El diseño surge de la necesidad de contribuir al logro de los estándares curriculares “justi co procedimientos aritméticos utilizando las relaciones y propiedades de las operaciones” y “formulo y resuelvo problemas en situaciones aditivas y multiplicativas, en diferentes contextos y dominios numéricos”
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