Search results for "228"

showing 10 items of 834 documents

Phosphorous doping and drawing effects on the Raman spectroscopic properties of O=P bond in silica-based fiber and preform.

2012

International audience; We report an experimental study of the doping and drawing effects on the Raman activities of phosphorus (P)-doped silica-based optical fiber and its related preform. Our data reveal a high sensitivity level in the full width at half maximum value of the 1330 cm−1 (O = P) Raman band to the P-doping level. Its increase with the P doping level does not clash with an increase in the disorder of the O = P surrendering matrix. In addition, we observe that in the central core region of the sample (higher doping level), the drawing process decreases the relative band amplitude. We tentatively suggest that this phenomenon is due to the change in the first derivate of the bond…

(060.2310) Fiber optics; (300.6450) Spectroscopy Raman; (160.2750) Glass and other amorphous materials; (060.2280) Fiber design and fabrication; (060.2290) Fiber materials.inorganic chemicalsMaterials scienceOptical fiberAnalytical chemistryChemical vapor depositionlaw.inventionCondensed Matter::Materials Sciencesymbols.namesakeOpticslawPolarizabilityCondensed Matter::SuperconductivityFiber[PHYS.PHYS.PHYS-OPTICS]Physics [physics]/Physics [physics]/Optics [physics.optics]business.industryDopingtechnology industry and agricultureFiber optics Spectroscopy Raman Glass and other amorphous materials Fiber design and fabrication Fiber materialsElectronic Optical and Magnetic MaterialsFull width at half maximumsymbolsbusinessRaman spectroscopyhuman activitiesRaman scattering
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Increasing temperature alters the within-host competition of viral strains and influences virus genetic variability

2021

Environmental conditions can affect viral accumulation, virulence and adaptation, which have implications in the disease outcomes and efficiency of control measures. Concurrently, mixed viral infections are relevant in plants, being their epidemiology shaped by within-host virus–virus interactions. However, the extent in which the combined effect of variations in abiotic components of the plant ecological niche and the prevalence of mixed infections affect the evolutionary dynamics of viral populations is not well understood. Here, we explore the interplay between ecological and evolutionary factors during viral infections and show that isolates of two strains of Pepino mosaic potexvirus co…

0106 biological sciencesMixed infectionsvirusesPlant virusVirulenceBiologyEvolutionary ecology01 natural sciencesMicrobiology03 medical and health sciencesplant virusenvironmental factorsVirologyPlant virusgenetic variabilityEnvironmental factorsAcademicSubjects/MED00860Genetic variabilityEvolutionary dynamics030304 developmental biologyGenetics0303 health sciencesGenetic diversityHost (biology)mixed infectionsAcademicSubjects/SCI01130AcademicSubjects/SCI02285evolutionary ecologyGenetic variabilityEvolutionary ecologyAdaptationResearch Article010606 plant biology & botany
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Adaptation of turnip mosaic potyvirus to a specific niche reduces its genetic and environmental robustness

2020

Robustness is the preservation of the phenotype in the face of genetic and environmental perturbations. It has been argued that robustness must be an essential fitness component of RNA viruses owed to their small and compacted genomes, high mutation rates and living in ever-changing environmental conditions. Given that genetic robustness might hamper possible beneficial mutations, it has been suggested that genetic robustness can only evolve as a side-effect of the evolution of robustness mechanisms specific to cope with environmental perturbations, a theory known as plastogenetic congruence. However, empirical evidences from different viral systems are contradictory. To test how adaptation…

0106 biological sciencesMutation rateNicherobustness010603 evolutionary biology01 natural sciencesMicrobiologyGenome03 medical and health sciencesplant virusVirologythermal fluctuationsAcademicSubjects/MED00860experimental evolutionplastogenetic congruence030304 developmental biologyvirus evolution0303 health sciencesExperimental evolutionbiologyAcademicSubjects/SCI01130AcademicSubjects/SCI02285PotyvirusRobustness (evolution)biology.organism_classificationPhenotypeEvolutionary biologyViral evolutionmutagenesisResearch Article
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Systematic analysis of specific and nonspecific auxin effects on endocytosis and trafficking.

2021

Abstract The phytohormone auxin and its directional transport through tissues are intensively studied. However, a mechanistic understanding of auxin-mediated feedback on endocytosis and polar distribution of PIN auxin transporters remains limited due to contradictory observations and interpretations. Here, we used state-of-the-art methods to reexamine the auxin effects on PIN endocytic trafficking. We used high auxin concentrations or longer treatments versus lower concentrations and shorter treatments of natural indole-3-acetic acid (IAA) and synthetic naphthalene acetic acid (NAA) auxins to distinguish between specific and nonspecific effects. Longer treatments of both auxins interfere wi…

0106 biological sciencesPhysiologyEndocytic cycleArabidopsisBREFELDIN-APlant Science01 natural sciencesPROTEIN TRAFFICKINGNaphthaleneacetic AcidsPlant Growth RegulatorsGOLGI-APPARATUSheterocyclic compoundsInternalizationResearch Articlesmedia_commonchemistry.chemical_classification0303 health sciencesAcademicSubjects/SCI01270biologyAcademicSubjects/SCI02288AcademicSubjects/SCI02287AcademicSubjects/SCI02286food and beveragesCorrigendaEndocytosisCell biologyProtein TransportMEMBRANE TRAFFICKINGIntracellulartrans-Golgi NetworkGNOM ARF-GEFAcademicSubjects/SCI01280media_common.quotation_subjectEndocytosisClathrin03 medical and health sciencesAuxinGeneticsEndomembrane systemVACUOLAR TRAFFICKINGPLANT030304 developmental biologyIndoleacetic AcidsArabidopsis ProteinsMEDIATES ENDOCYTOSISCell MembraneBiology and Life SciencesTransporterTRANSPORTchemistrybiology.proteinARABIDOPSIS-THALIANA010606 plant biology & botanyPlant physiology
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Ecografía pulmonar: principios y aplicaciones en kinesiterapia respiratoria

2019

La ecografia pulmonar ha recibido un creciente interes en los ultimos anos en medicina y, mas recientemente, en kinesiterapia. Las herramientas de evaluacion habituales del kinesiterapeuta tienen una precision diagnostica limitada. En este contexto, la ecografia pulmonar proporciona una excelente precision en la evaluacion de deficiencias que pueden ser de interes para el kinesiterapeuta: consolidacion pulmonar, sindrome alveolointersticial, derrame pleural, diafragma, etc. El uso de la ecografia pulmonar por parte del kinesiterapeuta ofrece nuevas perspectivas al mejorar la precision de la exploracion clinica y guiar la eleccion de la estrategia terapeutica frente a deficiencias pulmonares…

03 medical and health sciences0302 clinical medicine030228 respiratory system030208 emergency & critical care medicineEMC - Kinesiterapia - Medicina Física
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Exposición ambiental a dióxido de nitrógeno y salud respiratoria a los 2 años en la Cohorte INMA-Valencia

2018

Resumen: Objetivo: Analizar la relación entre la exposición a dióxido de nitrógeno (NO2) en las etapas prenatal y posnatal y la incidencia de problemas respiratorios en niños/as hasta los 2 años de edad. Método: La población consistió en 624 niños/as de la cohorte INMA-Valencia. Se estimó la exposición individual al NO2 en el exterior de la vivienda durante el periodo prenatal y hasta los 2 años de edad, a partir de la combinación de datos empíricos y el desarrollo de métodos geoestadísticos. Se aplicó un cuestionario para obtener la información sobre los síntomas respiratorios a los 2 años. La asociación entre la exposición al NO2 y los eventos respiratorios se realizó mediante regresión l…

03 medical and health sciences0302 clinical medicine030228 respiratory systemContaminación atmosféricaInfecciones respiratoriaslcsh:Public aspects of medicinePublic Health Environmental and Occupational Healthlcsh:RA1-1270030212 general & internal medicineTosDióxido de nitrógenoGaceta Sanitaria
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Le drainage thoracique aux urgences dans la prise en charge d’un épanchement pleural non traumatique

2019

Le drainage thoracique est un geste classique en médecine d’urgence. En dehors du traumatisé thoracique, les indications de drainage thoracique aux urgences sont essentiellement le pneumothorax spontané primitif ou secondaire et les épanchements pleuraux liquidiens en cas d’épanchement parapneumonique compliqué. La technique doit être connue des médecins urgentistes qui sont confrontés à la prise en charge initiale de ces patients. Le matériel de drainage ou « drainage pleural catheter », selon la terminologie proposée par Baumann, regroupe l’ensemble des matériels de thoracocentèse laissés en place au décours du geste. Il existe une multiplicité de matériel à disposition des cliniciens qui…

03 medical and health sciences0302 clinical medicine030228 respiratory systemEmergency Medicine030208 emergency & critical care medicineAnnales françaises de médecine d’urgence
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Registro y seguimiento clínico de pacientes con síndrome de Peutz Jeghers en Valencia

2020

Resumen: Introducción y objetivos: El síndrome de Peutz Jeghers (SPJ) es una enfermedad rara con herencia autosómica dominante, causada por una mutación germinal del gen STK11/LKB1, localizado en el cromosoma 19p13.3, que consiste en hiperpigmentación mucocutánea, poliposis hamartomatosa y predisposición al cáncer. Se pretende identificar y registrar a los pacientes con SPJ, hacer una descripción de la enfermedad y estimar la prevalencia en Valencia (España). Materiales y métodos: Se obtuvo un listado de historias clínicas en 10 hospitales, utilizando el conjunto mínimo de base de datos de ingresos hospitalarios del Ministerio de Sanidad y Consumo de España utilizando el código CIE-9 759.6.…

03 medical and health sciences0302 clinical medicine030228 respiratory systemGastroenterologylcsh:Diseases of the digestive system. Gastroenterology030212 general & internal medicinelcsh:RC799-869Revista de Gastroenterología de México
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Cuidado respiratorio en COVID-19

2020

Resumen Antecedentes El COVID-19 forma parte de la familia de los virus conocida como Coronaviridae. El nuevo patogeno β-coronavirus del subgenero Sarbecovirus se denomino inicialmente como el nuevo coronavirus (2019-nCoV); fue identificado en un brote de neumonia en Wuhan. Los pacientes desarrollan alteraciones en el sistema respiratorio, pudiendo llegar a padecer neumonia severa, edema pulmonar o sindrome de dificultad respiratoria aguda. Objetivo Revisar la evidencia cientifica disponible relacionada con el cuidado del sistema respiratorio, estableciendo pautas generales de tratamiento. Metodos Revision narrativa de la literatura. Se realizo una busqueda, seleccion y revision de articulo…

03 medical and health sciences0302 clinical medicine030228 respiratory systemMaterials Science (miscellaneous)030208 emergency & critical care medicineActa Colombiana de Cuidado Intensivo
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Análisis bibliométrico de los estudios IBERPOC y EPI-SCAN. Contribución de la temática tabaquismo al estudio IBERPOC

2018

Resumen Objetivos Realizar un analisis bibliometrico de los estudios IBERPOC y EPI-SCAN a traves de las bases de datos Science Citation Index y Scopus y conocer la repercusion global y el impacto de la tematica tabaquismo en el estudio IBERPOC. Metodo La busqueda bibliografica general fue realizada en Science Citation Index-Expanded a traves de la plataforma Web of Science (WoS) (Thomson Reuters) y en Scopus el 23 de marzo de 2015. La estrategia de busqueda empleada fue «iberpoc» OR «episcan». La busqueda de las citas se realizo el 15 de octubre de 2015. Resultados Se obtuvieron un total de 24 publicaciones; 13 del estudio IBERPOC (9 sobre «EPOC» y 4 sobre «tabaco») y 11 del estudio EPI-SCA…

03 medical and health sciences0302 clinical medicine030228 respiratory systemPublic Health Environmental and Occupational Health030212 general & internal medicineFamily PracticeMedicina de Familia. SEMERGEN
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