320 research outputs found
The Third Sector as a Renewable Resource for Europe
Third sector impact; Volunteering; Charity; European Commission; Political legitimacy; Third Sector in Europe; Third Sector as a Renewable Resource; Obstacles to Third Sector Organisation; Development in Europ
Nonlinear response of electrons to a positive ion
Electric field dynamics at a positive ion imbedded in an electron gas is
considered using a semiclassical description. The dependence of the field
autocorrelation function on charge number is studied for strong ion-electron
coupling via MD simulation. The qualitative features for larger charge numbers
are a decreasing correlation time followed by an increasing anticorrelation.
Stopping power and related transport coefficients determined by the time
integral of this correlation function result from the competing effects of
increasing initial correlations and decreasing dynamical correlations. An
interpretation of the MD results is obtained from an effective single particle
model showing good agreement with the simulation results.Comment: To be published in the proceedings of the International Workshop on
Strongly Coupled Coulomb Systems, Journal of Physics
Stellar population and structural properties of dwarf galaxies and young stellar systems in the M81 group
We use Hyper Suprime-Cam on the Subaru Telescope to investigate the
structural and photometric properties of early-type dwarf galaxies and young
stellar systems at the center of the M81 Group. We have mapped resolved stars
to magnitudes below the tip of the red giant branch over almost 6.5
square degrees, corresponding to a projected area of at
the distance of M81. The resulting stellar catalogue enables a homogeneous
analysis of the member galaxies with unprecedented sensitivity to low surface
brightness emission. The radial profiles of the dwarf galaxies are
well-described by Sersic and King profiles, and show no obvious signatures of
tidal disruption. The measured radii for most of these systems are larger than
the existing literature values and we find the total luminosity of IKN
() to be almost 3 magnitudes brighter than
previously-thought. We identify new dwarf satellite candidates, d1006+69 and
d1009+68, which we estimate to lie at a distance of Mpc and
Mpc. With and
, d1006+69 is one of the faintest and most metal-poor
dwarf satellites currently-known in the M81 Group. The luminosity functions of
young stellar systems in the outlying tidal HI debris imply continuous star
formation in the recent past and the existence of populations as young as 30
Myr old. We find no evidence for old RGB stars coincident with the young
MS/cHeB stars which define these objects, supporting the idea that they are
genuinely new stellar systems resulting from triggered star formation in
gaseous tidal debris.Comment: 24 pages, 22 figures, Accepted for publication in Ap
High-resolution mass spectrometry identifies delayed biomarkers for improved precision in acetaminophen/paracetamol human biomonitoring
Paracetamol/acetaminophen (N-acetyl-p-aminophenol, APAP) is a top selling analgesic used in more than 600 prescription and non-prescription pharmaceuticals. To study efficiently some of the potential undesirable effects associated with increasing APAP consumption (e.g., developmental disorders, drug-induced liver injury), there is a need to improve current APAP biomonitoring methods that are limited by APAP short half-life. Here, we demonstrate using high-resolution mass spectrometry (HRMS) in several human studies that APAP thiomethyl metabolite conjugates (S-methyl-3-thioacetaminophen sulfate and S-methyl-3-thioacetaminophen sulphoxide sulfate) are stable biomarkers with delayed excretion rates compared to conventional APAP metabolites, that could provide a more reliable history of APAP ingestion in epidemiological studies. We also show that these biomarkers could serve as relevant clinical markers to diagnose APAP acute intoxication in overdosed patients, when free APAP have nearly disappeared from blood. Using in vitro liver models (HepaRG cells and primary human hepatocytes), we then confirm that these thiomethyl metabolites are directly linked to the toxic N-acetyl-p-benzoquinone imine (NAPQI) elimination, and produced via an overlooked pathway called the thiomethyl shunt pathway. Further studies will be needed to determine whether the production of the reactive hepatotoxic NAPQI metabolites is currently underestimated in human. Nevertheless, these biomarkers could already serve to improve APAP human biomonitoring, and investigate, for instance, inter-individual variability in NAPQI production to study underlying causes involved in APAP-induced hepatotoxicity. Overall, our findings demonstrate the potential of exposomics-based HRMS approach to advance towards a better precision for human biomonitoring.</p
Association Between Raised Blood Pressure and Dysglycemia in Hong Kong Chinese
OBJECTIVE—To investigate the association between raised blood pressure and dysglycemia
- …