Ermakov-Lewis angles for one-parameter supersymmetric families of Newtonian free damping modes

We apply the Ermakov-Lewis procedure to the one-parameter damped modes \tilde{y} recently introduced by Rosu and Reyes, which are related to the common Newtonian free damping modes y by the general Riccati solution [H.C. Rosu and M. Reyes, Phys. Rev. E 57, 4850 (1998), physics/9707019]. In particular, we calculate and plot the angle quantities of this approach that can help to distinguish these modes from the common y modesComment: 6 pages, twocolumn, 18 figs embedded, only first 9 publishe

Morphological Study and Dielectric Behavior of Nonisothermally Crystallized Poly(ethylene naphthalate) Nanocomposites as a Function of Graphene Content

Morphological evolution and dielectric properties of poly(ethylene naphthalate)- (PEN-) graphene nanocomposites nonisothermally crystallized have been investigated. PEN-graphene nanocomposites containing 0.01, 0.025, 0.05, 0.075, and 0.1 wt% of graphene were prepared by melt blending in a mini twin screw extruder. The results showed that graphene exhibited a superior influence on morphological and conformational structure of PEN during nonisothermal crystallization at low graphene contents. Crystallization temperature (Tc) was found to be increased up to 18°C supporting the high nucleating activity of graphene layers. Wide angle X-ray diffraction (WAXD) and Fourier Transform Infrared Spectroscopy (FTIR) indicated that graphene modifies the conformation of PEN chains promoting crystallinity and favoring the evolution from α to β crystalline form with homogeneous lamellar thickness. It may be attributed to the structural similarity between naphthalene rings and graphene structure and to π-π interactions during nucleation. Dielectric behavior was found to be a function of graphene content where the nanocomposites changed from dielectric to low conducting material when passing from 0.075 to 0.1 wt% of graphene content. This phenomenon permits having a wide range of properties to fit a wide variety of applications required to store electrical energy of low voltage

Uso del agua de coco (Cocos nucifera) como terapia electrolítica intravenosa en caninos deshidratados

The objective of this study was to evaluate the use of coconut water (AC) applied intravenously in dogs. In a first phase the sterility and isotonicity of the CA was evaluated. In a second phase, the hematological changes produced 24 hours after the application of CA by intraperitoneal route in rats were evaluated. In a third phase the application of AC applied intravenously was evaluated in dogs with and without physical activity (n=20, per group), where the hematological values, pH and chlorine and sodium levels were determined before and after its application, as well as the heart rate, respiratory rate and temperature at the beginning, at 15, 30, 45, 60 minutes after the start of the application and 30 minutes after the application of the AC. The results showed that AC is sterile and isotonic, did not produce significant alterations in the hematological values of rats or in dogs without physical activity. However, dogs with physical activity showed a reduction in hematocrit at 30 minutes after application and a slight reduction in sodium levels.El presente trabajo tuvo como objetivo evaluar el uso del agua de coco (AC) aplicada por vía intravenosa en perros. En una primera fase se evaluó la esterilidad e isotonicidad del AC. En una segunda fase se evaluaron los cambios hematológicos producidos 24 horas pos-aplicación del AC por vía intraperitoneal en ratas. En una tercera fase se evaluó la aplicación de AC vía intravenosa en perros con y sin actividad física (n=20, por grupo), donde se determinaron los valores hematológicos, pH y niveles de cloro y sodio antes y después de su aplicación, así como la frecuencia cardiaca, frecuencia respiratoria y temperatura al inicio, a los 15, 30, 45, 60 minutos de iniciada la aplicación y 30 minutos después de la aplicación del AC. Los resultados muestran que el AC es estéril e isotónico, no produjo alteraciones significativas en los valores hematológicos de las ratas ni en los perros sin actividad física. Sin embargo, los perros con actividad física mostraron una reducción del hematocrito a los 30 minutos pos-aplicación y una leve reducción de los niveles de sodio

EVALUACIÓN POSNATAL DE LAS ARTERIOLAS PULMONARES EN CRÍAS DE ALPACA

In the postnatal phase in mammalians, the vasodilatation of the pulmonary arterioles is critical, since this will affect the amount of blood passing through the alveoli for oxygenation. The aim of the study was to evaluate the diameter, the thickness of the muscle layer and the relationship muscle layer/arteriolar diameter (CM/DA) as indication of changes in the vascular lumen in the postnatal period of baby alpacas. Lungs of 36 alpacas between 1 to 45 days of age were obtained according to nine age groups (one group each 5 days of age). The lung histological sections were stained with Mallory’s phosphotungstic acid hematoxylin. The arteriolar diameter showed a significant increase (p<0.05) between age groups 1 and 2 versus 7, 8 and 9. The thickness of the muscle layer showed no significant changes between groups, while the CM/DA relationship values decreased with age (groups 1 and 2 were statistical different of groups 6, 7, 8 and 9; p<0.05). It is concluded that the CM/DA relationship decreases and the lumen of pulmonary arterioles increases according to age, and this is due to increased arteriolar diameter (p<0.05) but not to thickness of smooth muscles.En la etapa posnatal de mamíferos es de vital importancia la vasodilatación de las arteriolas pulmonares, pues de estas dependerá la cantidad de sangre que pase por los alveolos para ser oxigenada. El presente estudio tuvo por objetivo evaluar el diámetro, el grosor de la capa muscular y la relación capa muscular/diámetro arteriolar (CM/DA) para evaluar los cambios de la luz vascular en la etapa posnatal de crías de alpaca. Se utilizaron pulmones de 36 alpacas de 1 a 45 días de edad, distribuidos en nueve grupos etarios (un grupo por cada cinco días de edad). Los cortes histológicos de pulmón fueron coloreados con hematoxilina fosfotúngstica de Mallory. El diámetro arteriolar pulmonar mostró un incremento significativo (p<0.05) entre los grupos etarios 1 y 2 versus 7, 8 y 9. El grosor de la capa muscular no evidenció cambios significativos entre grupos, mientras que los valores de la relación CM/DA se incrementaron con la edad, habiendo diferencias estadísticas entre grupos etarios 1 y 2 versus 6, 7, 8 y 9 (p<0.05). Se concluye que la relación CM/DA disminuye y el lumen de las arteriolas pulmonares aumenta a medida que la edad de los animales se incrementa, debido al aumento del diámetro arteriolar pulmonar (p<0.05), mas no del grosor del músculo liso

Nuevas amenazas para la recuperación de la población de oso pardo cantábrico

Trabajo presentado al: Congress on “New challenges for the management and conservation of bear and Wolf population”. XII Symposium International-WAVES, Zamora, 28 Septiembre-1 Octubre.Peer reviewe

The state of the Martian climate

60°N was +2.0°C, relative to the 1981–2010 average value (Fig. 5.1). This marks a new high for the record. The average annual surface air temperature (SAT) anomaly for 2016 for land stations north of starting in 1900, and is a significant increase over the previous highest value of +1.2°C, which was observed in 2007, 2011, and 2015. Average global annual temperatures also showed record values in 2015 and 2016. Currently, the Arctic is warming at more than twice the rate of lower latitudes

Antimicrobial resistance among migrants in Europe: a systematic review and meta-analysis

BACKGROUND: Rates of antimicrobial resistance (AMR) are rising globally and there is concern that increased migration is contributing to the burden of antibiotic resistance in Europe. However, the effect of migration on the burden of AMR in Europe has not yet been comprehensively examined. Therefore, we did a systematic review and meta-analysis to identify and synthesise data for AMR carriage or infection in migrants to Europe to examine differences in patterns of AMR across migrant groups and in different settings. METHODS: For this systematic review and meta-analysis, we searched MEDLINE, Embase, PubMed, and Scopus with no language restrictions from Jan 1, 2000, to Jan 18, 2017, for primary data from observational studies reporting antibacterial resistance in common bacterial pathogens among migrants to 21 European Union-15 and European Economic Area countries. To be eligible for inclusion, studies had to report data on carriage or infection with laboratory-confirmed antibiotic-resistant organisms in migrant populations. We extracted data from eligible studies and assessed quality using piloted, standardised forms. We did not examine drug resistance in tuberculosis and excluded articles solely reporting on this parameter. We also excluded articles in which migrant status was determined by ethnicity, country of birth of participants' parents, or was not defined, and articles in which data were not disaggregated by migrant status. Outcomes were carriage of or infection with antibiotic-resistant organisms. We used random-effects models to calculate the pooled prevalence of each outcome. The study protocol is registered with PROSPERO, number CRD42016043681. FINDINGS: We identified 2274 articles, of which 23 observational studies reporting on antibiotic resistance in 2319 migrants were included. The pooled prevalence of any AMR carriage or AMR infection in migrants was 25·4% (95% CI 19·1-31·8; I2 =98%), including meticillin-resistant Staphylococcus aureus (7·8%, 4·8-10·7; I2 =92%) and antibiotic-resistant Gram-negative bacteria (27·2%, 17·6-36·8; I2 =94%). The pooled prevalence of any AMR carriage or infection was higher in refugees and asylum seekers (33·0%, 18·3-47·6; I2 =98%) than in other migrant groups (6·6%, 1·8-11·3; I2 =92%). The pooled prevalence of antibiotic-resistant organisms was slightly higher in high-migrant community settings (33·1%, 11·1-55·1; I2 =96%) than in migrants in hospitals (24·3%, 16·1-32·6; I2 =98%). We did not find evidence of high rates of transmission of AMR from migrant to host populations. INTERPRETATION: Migrants are exposed to conditions favouring the emergence of drug resistance during transit and in host countries in Europe. Increased antibiotic resistance among refugees and asylum seekers and in high-migrant community settings (such as refugee camps and detention facilities) highlights the need for improved living conditions, access to health care, and initiatives to facilitate detection of and appropriate high-quality treatment for antibiotic-resistant infections during transit and in host countries. Protocols for the prevention and control of infection and for antibiotic surveillance need to be integrated in all aspects of health care, which should be accessible for all migrant groups, and should target determinants of AMR before, during, and after migration. FUNDING: UK National Institute for Health Research Imperial Biomedical Research Centre, Imperial College Healthcare Charity, the Wellcome Trust, and UK National Institute for Health Research Health Protection Research Unit in Healthcare-associated Infections and Antimictobial Resistance at Imperial College London