271 research outputs found
Variation of some physical and chemical quality traits of Moroccan domesticated tetraploid oat lines of <i>Avena murphyi</i> Ladiz.
A potential in improving nutrition and health is the consumption of high balanced whole grains. A breeding program was launched by the National Institute for Agricultural Research (INRA-Morocco), aiming to develop new domesticated tetraploid oat lines of Avena murphyi Ladiz., with high nutritional benefits. A sequence-based diversity study was conducted on ten tetraploid oat lines of A. murphyi to shed light not only on the importance of domesticating wild oat species for crop improvement but also to highlight the nutritional traits of those oat lines. In this study, we assessed the lines for some grain nutritional traits, such as groat contents of proteins and lipids as well as ash, fiber fractions, carbohydrates, and minerals.The obtained results showed a wide range of chemical contents among lines. The results revealed a high significant difference (P < 0.001) in the groat contents of proteins (11.46–15.12%), fat (4.14–10.14%), carbohydrates (48.68–57.38%), and ash (2.71–5.18%). Analysis of total fiber fractions (NDF, ADF, ADL and CF), showed the presence of significant differences between the assessed lines. The lines A. murphyi 8 and 9, recorded the highest groat protein contents of 15.12% and 13.66%, with an interesting macroelement profile, mainly magnesium and phosphorus, and iron and manganese as minor mineral profile.Due to their biochemical composition, Moroccan domesticated tetraploid oat lines of A. murphyi offer many opportunities to improve oat cultivation in Morocco and serve as an excellent raw material for foodstuffs formulation
ASSESSMENT OF IMPORTANT TECHNOLOGICAL PARAMETERS OF NEW MOROCCAN DOMESTICATED TETRAPLOID OAT LINES OF AVENA MAGNA
Results of studying the oat collection of the N. I. Vavilov All-Russian Institute of Plant Genetic Resources are presented. Field and Nine tetraploid oat lines of Avena magna Murph. et Terr. were assessed for their technological performance. Physicochemical analyses were performed, including moisture, ash, proteins, fibre fractions, lipids, carbohydrates, and minerals. Statistical analysis revealed noteworthy differences in the chemical composition between the cultivars
The Trigger and Data Acquisition System for the KM3NeT-Italy neutrino telescope
KM3NeT-Italy is an INFN project that will develop the central part of a submarine cubic-kilometer neutrino telescope in the Ionian Sea, at about 80 km from the Sicilian coast (Italy). It will use hundreds of distributed optical modules to measure the Cherenkov light emitted by high-energy muons, whose signal-to-noise ratio is quite disfavoured. In this contribution the Trigger and Data Acquisition System (TriDAS) developed for the KM3NeT-Italy detector is presented. The "all data to shore" approach is adopted to reduce the complexity of the submarine detector: at the shore station the TriDAS collects, processes and filters all the data coming from the detector, storing triggered events to a permanent storage for subsequent analysis. Due to the large optical background in the sea from 40K decays and bioluminescence, the throughput from the sea can range up to 30 Gbps. This puts strong constraints on the performances of the TriDAS processes and the related network infrastructure
CANGAROO-III observation of TeV gamma rays from the unidentified gamma-ray source HESS J1614-518
We report the detection, with the CANGAROO-III imaging atmospheric Cherenkov
telescope array, of a very high energy gamma-ray signal from the unidentified
gamma-ray source HESS J1614-518, which was discovered in the H.E.S.S. Galactic
plane survey. Diffuse gamma-ray emission was detected above 760 GeV at the 8.9
sigma level during an effective exposure of 54 hr from 2008 May to August. The
spectrum can be represented by a power-law:
8.2+-2.2_{stat}+-2.5_{sys}x10^{-12}x (E/1TeV)^{-Gamma} cm^{-2} s^{-1} TeV^{-1}
with a photon index Gamma of 2.4+-0.3_{stat}+-0.2_{sys}, which is compatible
with that of the H.E.S.S. observations. By combining our result with
multi-wavelength data, we discuss the possible counterparts for HESS J1614-518
and consider radiation mechanisms based on hadronic and leptonic processes for
a supernova remnant, stellar winds from massive stars, and a pulsar wind
nebula. Although a leptonic origin from a pulsar wind nebula driven by an
unknown pulsar remains possible, hadronic-origin emission from an unknown
supernova remnant is preferred.Comment: 9 pages, 7 figures, accepted for publication in Ap
Observation of associated production of a boson with a meson in the~forward region
A search for associated production of a boson with an open charm meson is
presented using a data sample, corresponding to an integrated luminosity of
of proton--proton collisions at a centre-of-mass energy
of 7\,TeV, collected by the LHCb experiment. %% Seven candidate events for
associated production of a boson with a meson and four candidate
events for a boson with a meson are observed with a combined
significance of 5.1standard deviations. The production cross-sections in the
forward region are measured to be where the first uncertainty is statistical and the
second systematic.Comment: 18 pages, 2 figure
Measurements of the , , meson and baryon lifetimes
Measurements of -hadron lifetimes are reported using collision data,
corresponding to an integrated luminosity of 1.0fb, collected by the
LHCb detector at a centre-of-mass energy of Tev. Using the exclusive decays
, , ,
and the average decay
times in these modes are measured to be = 0.004 0.003 ps, =
0.006 0.004 ps, = 0.013
0.005 ps, = 0.027
0.006 ps and = 0.011
0.005 ps, where the first uncertainty is statistical and the second is
systematic. These represent the most precise lifetime measurements in these
decay modes. In addition, ratios of these lifetimes, and the ratio of the
decay-width difference, , to the average width, , in
the system, , are
reported. All quantities are found to be consistent with Standard Model
expectations.Comment: 28 pages, 4 figures. Updated reference
On the evolution of the Gamma- and X-ray luminosities of Pulsar Wind Nebulae
Pulsar wind nebulae are a prominent class of very high energy (E > 0.1 TeV)
Galactic sources. Their Gamma-ray spectra are interpreted as due to inverse
Compton scattering of ultrarelativistic electrons on the ambient photons,
whereas the X-ray spectra are due to synchrotron emission. We investigate the
relation between the Gamma- and-X-ray emission and the pulsars' spin-down
luminosity and characteristic age. We find that the distance-independent Gamma-
to X-ray flux ratio of the nebulae is inversely proportional to the spin-down
luminosity, (\propto \dot{E}^-1.9), while it appears proportional to the
characteristic age, (\propto tau_c^2.2), of the parent pulsar. We interpret
these results as due to the evolution of the electron energy distribution and
the nebular dynamics, supporting the idea of so-called relic pulsar wind
nebulae. These empirical relations provide a new tool to classify unidentified
diffuse Gamma-ray sources and to estimate the spin-down luminosity and
characteristic age of rotation powered pulsars with no detected pulsation from
the X- and Gamma-ray properties of the associated pulsar wind nebulae. We apply
these relations to predict the spin-down luminosity and characteristic age of
four (so far unpulsing) candidate pulsars associated to wind nebulae.Comment: Accepted for publication in ApJ (6 pages, 2 figures
A Smoking Gun in the Carina Nebula
The Carina Nebula is one of the youngest, most active sites of massive star
formation in our Galaxy. In this nebula, we have discovered a bright X-ray
source that has persisted for ~30 years. The soft X-ray spectrum, consistent
with kT ~128 eV blackbody radiation with mild extinction, and no counterpart in
the near- and mid-infrared wavelengths indicate that it is a ~1e6-year-old
neutron star housed in the Carina Nebula. Current star formation theory does
not suggest that the progenitor of the neutron star and massive stars in the
Carina Nebula, in particular Eta Carinae, are coeval. This result suggests that
the Carina Nebula experienced at least two major episodes of massive star
formation. The neutron star may be responsible for remnants of high energy
activity seen in multiple wavelengths.Comment: 9 pages, 3 figures, accepted for publication to ApJ
High-Resolution Timing Observations of Spin-Powered Pulsars with the AGILE Gamma-Ray Telescope
AGILE is a small gamma-ray astronomy satellite mission of the Italian Space
Agency dedicated to high-energy astrophysics launched in 2007 April. Its 1
microsecond absolute time tagging capability coupled with a good sensitivity in
the 30 MeV-30 GeV range, with simultaneous X-ray monitoring in the 18-60 keV
band, makes it perfectly suited for the study of gamma-ray pulsars following up
on the CGRO/EGRET heritage. In this paper we present the first AGILE timing
results on the known gamma-ray pulsars Vela, Crab, Geminga and B 1706-44. The
data were collected from 2007 July to 2008 April, exploiting the mission
Science Verification Phase, the Instrument Timing Calibration and the early
Observing Pointing Program. Thanks to its large field of view, AGILE collected
a large number of gamma-ray photons from these pulsars (about 10,000 pulsed
counts for Vela) in only few months of observations. The coupling of AGILE
timing capabilities, simultaneous radio/X-ray monitoring and new tools aimed at
precise photon phasing, exploiting also timing noise correction, unveiled new
interesting features at sub-millisecond level in the pulsars' high-energy
light-curves.Comment: Accepted for publication in The Astrophysical Journal. 14 pages in
emulate-apj style, 2 tables, 9 figures (1 color). Replacement corrected
Figure
Computing at SuperB
Domenico Del Prete*, Fabrizio Bianchi, Vania Boccia, Vincenzo Ciaschini, Marco Corvo, Guglielmo De Nardo, Andrea Di Simone, Giacinto Donvito, Armando Fella, Paolo Franchini, Francesco Giacomini, Alberto Gianoli, Giuliano Laccetti, Stefano Longo, Steffen Luitz, Eleonora Luppi, Matteo Manzali, Leonardo Merola, Silvio Pardi, Alejandro Perez, Matteo Rama, Guido Russo, Bruno Santeramo, Roberto Stroili, Luca Tommasett
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