868 research outputs found
Draft genome sequence of the naphthalene degrader Herbaspirillum sp. strain RV1423
Herbaspirillum sp. strain RV1423 was isolated from a site contaminated with alkanes and aromatic compounds and harbors the complete pathway for naphthalene degradation. The new features found in RV1423 increase considerably the versatility and the catabolic potential of a genus of bacteria previously considered mainly to be diazotrophic endophytes to plants
Barreras y desafíos para el desarrollo de la telesalud en el Perú en el contexto de la COVID-19
The purpose of the article is to describe the main barriers and challenges for the development of telehealth in Peru. This article discusses the role of the digital ecosystem in Latin America, the digital transformation of the health sector and the access to telehealth services in Peru. The barriers and challenges are grouped into components such as: infrastructure, infostructure, regulatory framework, trained health personnel, data management and information security, and the administrative processes for telehealth in Peru. Telemedicine represents an efficient strategy to ensure the continuity of health services to the population in situations such as the current COVID-19 pandemic. It is important to promote telehealth in primary health-care centers, due to their important role in the patient flow management to be referred to a more complex center. In addition, to strengthening the training of human resources in telehealth and digital health is essential to promote the development of telehealth in Peru.El objetivo del artículo es describir las principales barreras y desafíos para el desarrollo de la telesalud en el Perú. Se discute el rol del ecosistema digital en América Latina, la transformación digital en el sector salud, el acceso a la telesalud en el Perú. Las barreras y desafíos se agrupan en componentes tales como: infraestructura, infoestructura, marco normativo, personal de salud capacitado, tratamiento de datos y seguridad informática, y los procesos administrativos para la telesalud en el Perú. La telemedicina representa una estrategia eficiente para garantizar la continuidad de la prestación de servicios de salud a la población en situaciones como la actual pandemia por el COVID-19. Resulta importante impulsar la implementación de la telesalud en los establecimientos de salud que conforman el primer nivel de atención ya que juegan el rol importante en la gestión de pacientes para su referencia a establecimientos de mayor complejidad. Asimismo, fortalecer la formación de recursos humanos en telesalud y la salud digital resulta fundamental para impulsar el desarrollo de la telesalud en el Perú
The He abundance in the metal-deficient blue compact dwarf galaxies Tol 1214-277 and Tol 65
We present high-quality Keck telescope spectroscopic observations of the two
metal-deficient blue compact dwarf (BCD) galaxies Tol 1214-277 and Tol 65.
These data are used to derive the heavy-element and helium abundances. We find
that the oxygen abundances in Tol 1214-277 and Tol 65 are the same,
12+logO/H=7.54+/-0.01, or Zsun/24, despite the different ionization conditions
in these galaxies. The nitrogen-to-oxygen abundance ratio in both galaxies is
logN/O=-1.64+/-0.02 and lies in the narrow range found for the other most
metal-deficient BCDs. We use the five strongest HeI emission lines 3889, 4471,
5876, 6678 and 7065, to correct self-consistently their intensities for
collisional and fluorescent enhancement mechanisms and to derive the He
abundance. Underlying stellar absorption is found to be important for the HeI
4471 emission line in both galaxies, being larger in Tol 65. The weighted He
mass fractions in Tol 1214-277 and Tol 65 are respectively Y=0.2458+/-0.0039
and 0.2410+/-0.0050 when the three HeI emission lines, 4471, 5876 and 6678, are
used, and are, respectively, 0.2466+/-0.0043 and 0.2463+/-0.0057 when the HeI
4471 emission line is excluded. These values are in very good agreement with
recent measurements of the He mass fraction in others of the most
metal-deficient BCDs by Izotov and coworkers. We find that the combined effect
of the systematic uncertainties due to the underlying HeI stellar absorption
lines, ionization and temperature structure of the HII region and collisional
excitation of the hydrogen emission lines is likely small, not exceeding ~2%
(the error is 2sigma). Our results support the validity of the standard big
bang model of nucleosynthesis.Comment: 22 pages, 3 Postscript figures, accepted for publication in the
Astrophysical Journa
Carbon Stars and other Luminous Stellar Populations in M33
The M33 galaxy is a nearby, relatively metal-poor, late-type spiral. Its
proximity and almost face-on inclination means that it projects over a large
area on the sky, making it an ideal candidate for wide-field CCD mosaic
imaging. Photometry was obtained for more than 10^6 stars covering a 74' x 56'
field centered on M33. Main sequence (MS), supergiant branch (SGB), red giant
branch (RGB) and asymptotic giant branch (AGB) populations are identified and
classified based on broad-band V and I photometry. Narrow-band filters are used
to measure spectral features allowing the AGB population to be further divided
into C and M-star types. The galactic structure of M33 is examined using star
counts, colour-colour and colour-magnitude selected stellar populations. We use
the C to M-star ratio to investigate the metallicity gradient in the disk of
M33. The C/M-star ratio is found to increase and then flatten with increasing
galactocentric radius in agreement with viscous disk formation models. The
C-star luminosity function is found to be similar to M31 and the SMC,
suggesting that C-stars should be useful distance indicators. The ``spectacular
arcs of carbon stars'' in M33 postulated recently by Block et al. (2004) are
found in our work to be simply an extension of M33's disk.Comment: 20 pages, 20 figures. Accepted for publication in The Astronomical
Journa
Draft genome sequence of the naphthalene degrader Herbaspirillum sp. strain RV1423
Les élastomères thermoplastiques sont des matériaux relativement nouveaux qui se caractérisent à la fois par une mise en oeuvre rapide analogue à celle des polymères thermoplastiques et par des propriétés intermédiaires entre celles des élastomères vulcanisés et des polymères thermoplastiques plastifiés. On passe en revue de façon succincte les principaux élastomères thermoplastiques commerciaux ou en développement. Pour chacun d'eux, on décrit brièvement la structure, les propriétés, la mise en oeuvre et les applications. Thermoplastic elastomers are relatively new materials that are characterized both by rapid implementation, similar to that of thermoplastic polymers, and by properties intermediate between those of vulcanized elastomers and plasticized thermoplastic polymers. This article makes a succinct review of the leading commercial thermoplastic elastomers or the ones being developed. For each of them, a brief description is given of the structure, properties, implementation and applications
Electric Car Purchase Price as a Factor Determining Consumers’ Choice and their Views on Incentives in Europe
The deployment of zero-emission vehicles has the potential to drastically reduce air pollution and greenhouse gas emissions from road transport. The purpose of this study is to provide evidence on, and quantify the factors that influence, the European market for electric and fuel cell car technologies. The paper reports the results of a stated preference survey among 1,248 car owners in France, Germany, Italy, Poland, Spain and the United Kingdom. The variables that influence powertrain choice are quantified in a nested multinomial logit model. We find that the electric car purchase price continues to be a major deterrent to sales in the surveyed countries. The majority of the respondents considered government incentives as fundamental or important for considering an electric car purchase. Because of the differences in the socio-economic characteristics of consumers in each country, the effectiveness of government incentives may vary across Europe
First draft genome sequence of the Acidovorax caeni sp. nov. type strain R-24608 (DSM 19327)
We report the draft genome sequence of the Acidovorax caeni type strain R-24608 that was isolated from activated sludge of an aerobic-anaerobic wastewater treatment plant. The closest strain to Acidovorax caeni strain R-24608 is Acidovorax sp. strain MR-S7 with a 55.4% (amino-acid sequence) open reading frames (ORFs) average similarity
LOFAR discovery of a 700-kpc remnant radio galaxy at low redshift
Remnant radio galaxies represent the final dying phase of radio galaxy
evolution, in which the jets are no longer active. Due to their rarity in flux
limited samples and the difficulty of identification, this dying phase remains
poorly understood and the luminosity evolution largely unconstrained. Here we
present the discovery and detailed analysis of a large (700 kpc) remnant radio
galaxy with a low surface brightness that has been identified in LOFAR images
at 150 MHz. By combining LOFAR data with new follow-up Westerbork observations
and archival data at higher frequencies, we investigated the source morphology
and spectral properties from 116 to 4850 MHz. By modelling the radio spectrum
we probed characteristic timescales of the radio activity. The source has a
relatively smooth, diffuse, amorphous appearance together with a very weak
central compact core which is associated with the host galaxy located at
z=0.051. From our ageing and morphological analysis it is clear that the
nuclear engine is currently switched off or, at most, active at a very low
power state. The host galaxy is currently interacting with another galaxy
located at a projected separation of 15 kpc and a radial velocity offset of 300
km/s. This interaction may have played a role in the triggering and/or shut
down of the radio jets. The spectral shape of this remnant radio galaxy differs
from the majority of the previously identified remnant sources, which show
steep or curved spectra at low to intermediate frequencies. In light of this
finding and in preparation for new-generation deep low-frequency surveys, we
discuss the selection criteria to be used to select representative samples of
these sources.Comment: 10 pages, 6 figures, 5 tables, A&A accepte
Prosthetic Shoulder Joint Infection by Cutibacterium acnes: Does Rifampin Improve Prognosis? A Retrospective, Multicenter, Observational Study
Cutibacterium acnes; Infecció articular protèsica; Tractament quirúrgic i mèdicCutibacterium acnes; Infección articular protésica; Tratamiento quirúrgico y médicoCutibacterium acnes; Prosthetic joint infection; Surgical and medical treatmentThis retrospective, multicenter observational study aimed to describe the outcomes of surgical and medical treatment of C. acnes-related prosthetic joint infection (PJI) and the potential benefit of rifampin-based therapies. Patients with C. acnes-related PJI who were diagnosed and treated between January 2003 and December 2016 were included. We analyzed 44 patients with C. acnes-related PJI (median age, 67.5 years (IQR, 57.3–75.8)); 75% were men. The majority (61.4%) had late chronic infection according to the Tsukayama classification. All patients received surgical treatment, and most antibiotic regimens (43.2%) included β-lactam. Thirty-four patients (87.17%) were cured; five showed relapse. The final outcome (cure vs. relapse) showed a nonsignificant trend toward higher failure frequency among patients with previous prosthesis (OR: 6.89; 95% CI: 0.80–58.90) or prior surgery and infection (OR: 10.67; 95% IC: 1.08–105.28) in the same joint. Patients treated with clindamycin alone had a higher recurrence rate (40.0% vs. 8.8%). Rifampin treatment did not decrease recurrence in patients treated with β-lactams. Prior prosthesis, surgery, or infection in the same joint might be related to recurrence, and rifampin-based combinations do not seem to improve prognosis. Debridement and implant retention appear a safe option for surgical treatment of early PJI.This work received no specific funding from the public, private, or not-for-profit sectors
Prosthetic shoulder joint infection by cutibacterium acnes: does rifampin improve prognosis? a retrospective, multicenter, observational study
This retrospective, multicenter observational study aimed to describe the outcomes of surgical and medical treatment of C. acnes-related prosthetic joint infection (PJI) and the potential benefit of rifampin-based therapies. Patients with C. acnes-related PJI who were diagnosed and treated between January 2003 and December 2016 were included. We analyzed 44 patients with C. acnes-related PJI (median age, 67.5 years (IQR, 57.3–75.8)); 75% were men. The majority (61.4%) had late chronic infection according to the Tsukayama classification. All patients received surgical treatment, and most antibiotic regimens (43.2%) included β-lactam. Thirty-four patients (87.17%) were cured; five showed relapse. The final outcome (cure vs. relapse) showed a nonsignificant trend toward higher failure frequency among patients with previous prosthesis (OR: 6.89; 95% CI: 0.80–58.90) or prior surgery and infection (OR: 10.67; 95% IC: 1.08–105.28) in the same joint. Patients treated with clindamycin alone had a higher recurrence rate (40.0% vs. 8.8%). Rifampin treatment did not decrease recurrence in patients treated with β-lactams. Prior prosthesis, surgery, or infection in the same joint might be related to recurrence, and rifampin-based combinations do not seem to improve prognosis. Debridement and implant retention appear a safe option for surgical treatment of early PJI
- …