2,009 research outputs found
A Comparative Study of Knots of Star Formation in Interacting vs. Spiral Galaxies
Interacting galaxies are known to have higher global rates of star formation
on average than normal galaxies, relative to their stellar masses. Using UV and
IR photometry combined with new and published H-alpha images, we have compared
the star formation rates of ~700 star forming complexes in 46 nearby
interacting galaxy pairs with those of regions in 39 normal spiral galaxies.
The interacting galaxies have proportionally more regions with high star
formation rates than the spirals. The most extreme regions in the interacting
systems lie at the intersections of spiral/tidal structures, where gas is
expected to pile up and trigger star formation. Published Hubble Telescope
images show unusually large and luminous star clusters in the highest
luminosity regions. The star formation rates of the clumps correlate with
measures of the dust attenuation, consistent with the idea that regions with
more interstellar gas have more star formation. For the clumps with the highest
star formation rates, the apparent dust attenuation is consistent with the
Calzetti starburst dust attenuation law. This suggests that the high luminosity
regions are dominated by a central group of young stars surrounded by a shell
of clumpy interstellar gas. In contrast, the lower luminosity clumps are bright
in the UV relative to H-alpha, suggesting either a high differential
attenuation between the ionized gas and the stars, or a post-starburst
population bright in the UV but faded in H-alpha. The fraction of the global
light of the galaxies in the clumps is higher on average for the interacting
galaxies than for the spirals. Thus the star forming regions in interacting
galaxies are more luminous, dustier, or younger on average.Comment: Astronomical Journal, in pres
Acute Kidney Injury in the Intensive Care Unit
Acute kidney injury (AKI) is defined as an abrupt decrease in glomerular filtration rate (GFR). Incidence varies from 20% to as high as 70% in critically ill patients. Classically, AKI has been divided into three broad pathophysiologic categories: prerenal AKI, intrinsic AKI, and postrenal (obstructive) AKI. The clinical manifestations of AKI vary among a wide range of symptoms and metabolic abnormalities. A sudden decrease in GFR will result in rising concentrations of solutes in the blood, which are normally excreted by the kidneys. Recently, new urinary and serum biomarkers have gained a place in the diagnosis, classification, and prognosis prediction of AKI. The best treatment for AKI is prevention. Patients with prerenal azotemia should have intravascular volume deficits corrected and cardiac function optimized. Obstructive (postrenal) kidney disease is treated by mechanical relief of the block. The primary management of acute interstitial nephritis is discontinuation of the inciting agent. Renal replacement therapy (RRT) has emerged as a supportive mechanism rather than just as a lifesaving measure. Continuous techniques are preferable in treating critically ill patients, although every modality has its benefits, indications, and contraindications
Windows .NET Network Distributed Basic Local Alignment Search Toolkit (W.ND-BLAST)
BACKGROUND: BLAST is one of the most common and useful tools for Genetic Research. This paper describes a software application we have termed Windows .NET Distributed Basic Local Alignment Search Toolkit (W.ND-BLAST), which enhances the BLAST utility by improving usability, fault recovery, and scalability in a Windows desktop environment. Our goal was to develop an easy to use, fault tolerant, high-throughput BLAST solution that incorporates a comprehensive BLAST result viewer with curation and annotation functionality. RESULTS: W.ND-BLAST is a comprehensive Windows-based software toolkit that targets researchers, including those with minimal computer skills, and provides the ability increase the performance of BLAST by distributing BLAST queries to any number of Windows based machines across local area networks (LAN). W.ND-BLAST provides intuitive Graphic User Interfaces (GUI) for BLAST database creation, BLAST execution, BLAST output evaluation and BLAST result exportation. This software also provides several layers of fault tolerance and fault recovery to prevent loss of data if nodes or master machines fail. This paper lays out the functionality of W.ND-BLAST. W.ND-BLAST displays close to 100% performance efficiency when distributing tasks to 12 remote computers of the same performance class. A high throughput BLAST job which took 662.68 minutes (11 hours) on one average machine was completed in 44.97 minutes when distributed to 17 nodes, which included lower performance class machines. Finally, there is a comprehensive high-throughput BLAST Output Viewer (BOV) and Annotation Engine components, which provides comprehensive exportation of BLAST hits to text files, annotated fasta files, tables, or association files. CONCLUSION: W.ND-BLAST provides an interactive tool that allows scientists to easily utilizing their available computing resources for high throughput and comprehensive sequence analyses. The install package for W.ND-BLAST is freely downloadable from . With registration the software is free, installation, networking, and usage instructions are provided as well as a support forum
A Short and Improved Synthesis of the Antiprotozoal Abietane Diterpenoid (-)-Sugikurojin A
Financial support from the Spanish Government [Consejo Superior de Investigaciones Cientificas (201680I008)] is gratefully acknowledgedGonzález-Cardenete, MA.; Zaragoza, RJ. (2017). A Short and Improved Synthesis of the Antiprotozoal Abietane Diterpenoid (-)-Sugikurojin A. Synthesis. 49(6):1315-1318. https://doi.org/10.1055/s-0036-1588353S1315131849
Influences from “other influencers” for physical activity practice in teenagers
OBJETIVO Examinar la influencia social (apoyo social, influencia social e influencia como modelo) de los “otros significativos” (padre, madre, amigos, profesor de educaciĂłn fĂsica) en la práctica de actividad fĂsica segĂşn gĂ©nero y ciclo, en sujetos adolescentes.
MATERIAL Y MÉTODOS 831 sujetos de la provincia de Huesca (45,7% hombres y 54,3% mujeres) de entre 12 y 16 años. Contestaron a una adaptaciĂłn del cuestionario “Four by one-day Physical Activity Questionaire” y al “Cuestionario de influencias sobre la Actividad FĂsica y la Salud”.
RESULTADOS La influencia del profesor de educaciĂłn fĂsica como modelo y la influencia social de los amigos explicaron el 11,2% de la actividad fĂsica realizada. Se obtuvieron diferencias significativas para los referentes de gĂ©nero en todos los tipos de influencias sociales
DISCUSIĂ“N El apoyo e influencia social diferenciado por parte de los progenitores, en funciĂłn del gĂ©nero o edad de sus hijos, parece demostrar la importancia que tienen los referentes de gĂ©nero y los estereotipos sexuales, en la influencia sobre la práctica de actividad fĂsica en poblaciĂłn adolescente.OBJECTIVE To estimate the social influence (social support, social influence and model) that exert "significant others" (father, mother, friends, physical education teacher) on physical activity by gender and cycle, among a representative sample of students in the province of Huesca enrolled in secondary education.
MATERIALS AND METHOD The sample analysis was composed by 831 individuals from Huesca High School (45,7% men, 54,3% women), between 12 and 16 years old. Physical activity was assessed using an adapted version of “Four by one-day Physical Activity Questionaire” and “Cuestionario de influencias sobre la Actividad FĂsica y la Salud”.
RESULTS The physical activity teacher as a model and the social influence of friend explained 11,2% of the done physical activity. Significant differences in the social influences were obtained depending on the sex.
DISCUSSION The influence of the physical activity teacher and the support from the friends appear as positive factors for the physical activity practic
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