3,989 research outputs found
Advances in Numerical Data Visualization of Flow around a Square Cylinder
In this work, we present a grid study oriented to capture 3D flow simulations around smooth and wrinkled cylinders that could have practical applications in various engineering areas. The study considers three Reynolds numbers, namely, a benchmark Re = 2.14 × 104 and two orders of magnitude above and below it. The main contributions of the paper relate to the optimization of the computational mesh for the spanwise direction of the wind flow that results from the computational mathematical framework employed, in addition to a novel visualization technique that unfolds features in the recording data that could otherwise be hidden when using traditional plots. We compare our benchmark results with those reported by other authors to conclude that the intermediate resolution grids employed with the widest spanwise provide acceptable results. Furthermore, the new visualization technique offers significant advantages compared to traditional pressure maps, regarding clarity for observing and interpreting local flow disturbances, making variations with Re clearer, and by enabling the detection of asymmetries
“ASOCIACION ENTRE SOBREPESO Y OBESIDAD CON COMPLICACIONES MATERNAS EN EL EMBARAZO Y PUERPERIO EN EL HOSPITAL GENERAL DE CUAUTITLAN “GENERAL JOSE VICENTE VILLADA” JULIO-DICIEMBRE 2016
4. RESUMEN
La OMS clasifica la obesidad como una pandemia. La prevalencia de sobrepeso y obesidad es mayor en mujeres, representando un 63% de mujeres por grupo de edad, así como el 50% de las mujeres embarazadas presentan obesidad o sobrepeso. En mujeres gestantes el sobrepeso y la obesidad se han asociado a un mayor número de complicaciones durante el embarazo, como son la diabetes gestacional, la enfermedad hipertensiva del embarazo, la preeclampsia, las infecciones maternas (urinarias o endometritis) la enfermedad tromboembólica, el asma y la apnea del sueño.
OBJETIVO: Conocer la asociación existente en pacientes con obesidad y sobrepeso con las complicaciones maternas en el embarazo y puerperio en el Hospital General de Cuautitlán “General José Vicente Villada”
Se realizó un estudio: Descriptivo, Observacional, Retrospectivo, Transversal.
Se analizaron expedientes, de las pacientes con obesidad y sobrepeso durante el embarazo, las cuales fueron captadas a su ingreso a la unidad toco quirúrgica de esta unidad, para analizar la evolución así como la resolución del embarazo en un periodo de 01 Julio 2016 al 31 de Diciembre 2016
Degradation of 4-Chlorophenol in a Batch Electrochemical Reactor Using BDD Electrodes
The influence of current density (j) (0.25, 0.30, 0.25 and 0.40 A/cm2), initial pH (2.6, 6.5 and 12), stirring speed (As) (400, 500 and 600 rpm), and initial concentration of 4-chlorophenol ([4-CP]0) (300, 500 and 700 mg/L) on degradation of persistent pollutant in a batch electrochemical cell without divisions is presented in this paper. The electrochemical cell was composed of two boron-doped diamond electrodes (BDD). The results of the study showed that best conditions for total degradation of 4-CP were: j of 0.40 A/cm , initial pH of 6.5, As of 500 rpm, and [4-CP]0 of 500 mg/L, after 150 min of reaction time. Removal of total organic carbon (TOC) was 83% at these conditions. The byproducts were identified by UHPLC. This allowed for the proposal of a degradation pathway of 4-CP at the best conditions. Furthermore, these results demonstrate that the electrochemical method employed in this study allows high percentages (96%) of degradation of 4-CP and that the process is applicable to wastewater treatment.CONACYT 26909
Closure of a large lumbosacral myelomeningocele post operative defect with a human cadaveric split-thickness skin graft: a case report
Spina bifida is the most common birth defect of the central nervous system that is compatible with life, and myelomeningocele represents its most frequent form. Congenital myelomeningocele (CMM) has a worldwide incidence of 0.5 to 0.8 per 1,000 live newborns. CMM is a complex condition resulting from incomplete closure of the neural tube, mainly in the lumbosacral region. The objective of the surgical repair of the CMM is the reconstruction of all the tissue layers of the defect, avoiding possible postoperative complications. The aim of this case review is to present a re-epithelialization closure in a patient with a large CMM defect in who primary hermetic closure was not possible because there was too much tension at the edges of the defect. Therefore, human cadaveric split-thickness skin grafts were placed over the dura mater and the aponeurotic layer, covering the entire defect and an adequate healing and completely closure of the defect were observed in eight weeks. The surgical management of large meningomyelocele defects represents a major challenge and no single protocol exists for its reconstruction. The repair of an MMC defect should be performed during the first 72 hours after birth. After neurosurgical closure of the neural tube and dura, the myelomeningocele defect requires good quality skin and subcutaneous tissue with minimal wound tension for stable coverage. Human cadaveric skin grafts are considered a useful technique for temporary wound coverage because they lead to a more natural healing environment, possess ideal properties, and provide a physiological barrier that reduces microbiological contamination, in addition, it acts as a bridge to adhere to and to seal wound beds
Imaginarios de pacientes prequirúrgicos respecto a estructura y función de sus órganos abdominales, un trabajo cualitativo
Introducción: el ser humano construye sus imaginarios como representaciones mentales propias, entre otras cosas, a partir de experiencias vividas. El imaginario corporal se construye desde los primeros meses de edad, cuando el niño reconoce a través del movimiento, que su cuerpo tiene partes con estructura y función definidas. La imagen corporal ha sido blanco de múltiples estudios desde la estética. No se ha explorado el imaginario respecto a aquellas partes del cuerpo que no pueden verse ni palparse, por lo que permanecen “silenciosas” y se hacen “visibles” con la enfermedad; tal es el caso de las patologías quirúrgicas abdominales, en las que resulta relevante explorar el imaginario, pues éste influye en las decisiones de los pacientes. Métodos: este estudio cualitativo, mediante la Teoría Fundada, realizado en el Hospital Universitario San Jorge de Pereira, describe el imaginario de siete pacientes pre-quirúrgicos respecto a la estructura y la función de sus órganos abdominales. Se realizaron entrevistas a profundidad, las cuales se transcribieron fielmente. Las unidades textuales permitieron realizar una codificación abierta, la información se condensó en una matriz de saturación y se obtuvo la categorización axial, tras lo cual se analizaron los datos con la triangulación de cotejo. Resultados/Discusión: El trabajo descriptivo y analítico facilitó la emergencia de cinco categorías importantes: 1. En los imaginarios, la estructura y la función de los órganos abdominales se construyen de manera diferente. 2. La enfermedad hace más patente la presencia de estructuras abdominales. 3. En los imaginarios, existen “órganos que sirven” y “otros que no sirven”. 4. En el origen del aprendizaje, aparece franca distancia entre el conocimiento popular y el conocimiento científico. 5. El procedimiento quirúrgico se acepta como una medida curativa
Imaginarios de pacientes prequirúrgicos respecto a estructura y función de sus órganos abdominales, un trabajo cualitativo
Introducción: el ser humano construye sus imaginarios como representaciones mentales propias, entre otras cosas, a partir de experiencias vividas. El imaginario corporal se construye desde los primeros meses de edad, cuando el niño reconoce a través del movimiento, que su cuerpo tiene partes con estructura y función definidas. La imagen corporal ha sido blanco de múltiples estudios desde la estética. No se ha explorado el imaginario respecto a aquellas partes del cuerpo que no pueden verse ni palparse, por lo que permanecen “silenciosas” y se hacen “visibles” con la enfermedad; tal es el caso de las patologías quirúrgicas abdominales, en las que resulta relevante explorar el imaginario, pues éste influye en las decisiones de los pacientes. Métodos: este estudio cualitativo, mediante la Teoría Fundada, realizado en el Hospital Universitario San Jorge de Pereira, describe el imaginario de siete pacientes pre-quirúrgicos respecto a la estructura y la función de sus órganos abdominales. Se realizaron entrevistas a profundidad, las cuales se transcribieron fielmente. Las unidades textuales permitieron realizar una codificación abierta, la información se condensó en una matriz de saturación y se obtuvo la categorización axial, tras lo cual se analizaron los datos con la triangulación de cotejo. Resultados/Discusión: El trabajo descriptivo y analítico facilitó la emergencia de cinco categorías importantes: 1. En los imaginarios, la estructura y la función de los órganos abdominales se construyen de manera diferente. 2. La enfermedad hace más patente la presencia de estructuras abdominales. 3. En los imaginarios, existen “órganos que sirven” y “otros que no sirven”. 4. En el origen del aprendizaje, aparece franca distancia entre el conocimiento popular y el conocimiento científico. 5. El procedimiento quirúrgico se acepta como una medida curativa
Identification of viral infections in the prostate and evaluation of their association with cancer
<p>Abstract</p> <p>Background</p> <p>Several viruses with known oncogenic potential infect prostate tissue, among these are the polyomaviruses BKV, JCV, and SV40; human papillomaviruses (HPVs), and human cytomegalovirus (HCMV) infections. Recently, the Xenotropic Murine Leukemia Virus-related gammaretrovirus (XMRV) was identified in prostate tissue with a high prevalence observed in prostate cancer (PC) patients homozygous for the glutamine variant of the RNASEL protein (462Q/Q). Association studies with the R462Q allele and non-XMRV viruses have not been reported. We assessed associations between prostate cancer, prostate viral infections, and the RNASEL 462Q allele in Mexican cancer patients and controls.</p> <p>Methods</p> <p>130 subjects (55 prostate cancer cases and 75 controls) were enrolled in the study. DNA and RNA isolated from prostate tissues were screened for the presence of viral genomes. Genotyping of the RNASEL R462Q variant was performed by Taqman method.</p> <p>Results</p> <p>R/R, R/Q, and Q/Q frequencies for R462Q were 0.62, 0.38, and 0.0 for PC cases and 0.69, 0.24, and 0.07 for controls, respectively. HPV sequences were detected in 11 (20.0%) cases and 4 (5.3%) controls. XMRV and HCMV infections were detected in one and six control samples, respectively. The risk of PC was significantly increased (Odds Ratio = 3.98; 95% CI: 1.17-13.56, p = 0.027) by infection of the prostatic tissue with HPV. BKV, JCV, and SV40 sequences were not detected in any of the tissue samples examined.</p> <p>Conclusions</p> <p>We report a positive association between PC and HPV infection. The 462Q/Q RNASEL genotype was not represented in our PC cases; thus, its interaction with prostate viral infections and cancer could not be evaluated.</p
Virtual research and learning communities in Latin America : The CEVALE2VE case
New strategies for the adaptation of higher scientific education to the requirements of the network society are briefly discussed, in particular the pivotal role played by virtual research and learning communities in the Latin American region. The Centro Virtual de Altos Estudios de Altas Energias (CEVALE2VE) is singled out in reference to the virtual graduate course on particle physics that was given at several Venezuelan and Colombian national universities and research institutions during the semesters September 2014 - February 2015 and March 2016 - July 2016. Different course implementation aspects are reviewed to encourage and facilitate similar regional initiatives in the near future.Peer reviewe
Polyclonality of Concurrent Natural Populations of Alteromonas macleodii
We have analyzed a natural population of the marine bacterium, Alteromonas macleodii, from a single sample of seawater to evaluate the genomic diversity present. We performed full genome sequencing of four isolates and 161 metagenomic fosmid clones, all of which were assigned to A. macleodii by sequence similarity. Out of the four strain genomes, A. macleodii deep ecotype (AltDE1) represented a different genome, whereas AltDE2 and AltDE3 were identical to the previously described AltDE. Although the core genome (∼80%) had an average nucleotide identity of 98.51%, both AltDE and AltDE1 contained flexible genomic islands (fGIs), that is, genomic islands present in both genomes in the same genomic context but having different gene content. Some of the fGIs encode cell surface receptors known to be phage recognition targets, such as the O-chain of the lipopolysaccharide, whereas others have genes involved in physiological traits (e.g., nutrient transport, degradation, and metal resistance) denoting microniche specialization. The presence in metagenomic fosmids of genomic fragments differing from the sequenced strain genomes, together with the presence of new fGIs, indicates that there are at least two more A. macleodii clones present. The availability of three or more sequences overlapping the same genomic region also allowed us to estimate the frequency and distribution of recombination events among these different clones, indicating that these clustered near the genomic islands. The results indicate that this natural A. macleodii population has multiple clones with a potential for different phage susceptibility and exploitation of resources, within a seemingly unstructured habitat
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