174 research outputs found
BIOENSAIO PARA DETERMINAÇÃO DA RESISTÊNCIA DE PLANTAS DANINHAS AOS HERBICIDAS INIBIDORES DA ENZIMA ALS
Sea level changes during the last and present interglacials in Sal Island (Cape Verde archipelago)
Last interglacial and Holocene deposits are particularly well developed in the southern parts of Sal Island (Cape
Verde Archipelago). They primarily consist of low-elevation (≤2 m above sea level [a.s.l.]) marine deposits
made of a basal conglomerate embedded in carbonate mud, passing upwards to calcarenites. All deposits
contain an abundant fauna with corals, algae and molluscs with Strombus latus Gmelin and accompanying
warm water species of the “Senegalese” fauna. Small scale geomorphological mapping with detailed
morphosedimentary analysis revealed lateral facies changes and imbricate (offlapping) structures that suggest
small-scale oscillations of paleo-sealevels during high sea stand intervals. U-series measurements (in coral
fragments) allowed unequivocal identification of Marine Isotope Substage (MIS) 5.5 units, but were not
precise enough to date the sea level oscillations of the interval. However, geomorphological data and
sedimentary facies analysis suggest a double sea level highstand during the peak of the last interglacial.
MIS 5.5 age deposits occur at Sal and the Canary Islands at low topographic elevations, between 1 and 2 masl.
However, these values are lower than the elevations measured for the correlative terraces outcropping at the
western tropical Atlantic islands, widely considered to be tectonically stable.
Combining the results in this paper with earlier investigations of the “Senegalese” fauna distribution as far
north as the Mediterranean basin, it is suggested that the last-interglacial oceanic temperatures in this basin, as
well as the temperatures in other islands of the Eastern Atlantic and the coasts of Morocco, were warmer than
modern temperatures
A First Search for coincident Gravitational Waves and High Energy Neutrinos using LIGO, Virgo and ANTARES data from 2007
We present the results of the first search for gravitational wave bursts
associated with high energy neutrinos. Together, these messengers could reveal
new, hidden sources that are not observed by conventional photon astronomy,
particularly at high energy. Our search uses neutrinos detected by the
underwater neutrino telescope ANTARES in its 5 line configuration during the
period January - September 2007, which coincided with the fifth and first
science runs of LIGO and Virgo, respectively. The LIGO-Virgo data were analysed
for candidate gravitational-wave signals coincident in time and direction with
the neutrino events. No significant coincident events were observed. We place
limits on the density of joint high energy neutrino - gravitational wave
emission events in the local universe, and compare them with densities of
merger and core-collapse events.Comment: 19 pages, 8 figures, science summary page at
http://www.ligo.org/science/Publication-S5LV_ANTARES/index.php. Public access
area to figures, tables at
https://dcc.ligo.org/cgi-bin/DocDB/ShowDocument?docid=p120000
The 2014 ALMA Long Baseline Campaign: Observations of the Strongly Lensed Submillimeter Galaxy HATLAS J090311.6+003906 at z = 3.042
The influence of protein malnutrition on the production of GM-CSF and M-CSF by macrophages
Searches for clustering in the time integrated skymap of the ANTARES neutrino telescope
This paper reports a search for spatial clustering of the arrival directions of high energy muon neutrinos detected by the ANTARES neutrino telescope. An improved two-point correlation method is used to study the autocorrelation of 3058 neutrino candidate events as well as cross-correlations with other classes of astrophysical objects: sources of high energy gamma rays, massive black holes and nearby galaxies. No significant deviations from the isotropic distribution of arrival directions expected from atmospheric backgrounds are observed
Constraining the neutrino emission of gravitationally lensed Flat-Spectrum Radio Quasars with ANTARES data
This paper proposes to exploit gravitational lensing effects to improve the sensitivity of neutrino telescopes to the intrinsic neutrino emission of distant blazar populations. This strategy is illustrated with a search for cosmic neutrinos in the direction of four distant and gravitationally lensed Flat-Spectrum Radio Quasars. The magnification factor is estimated for each system assuming a singular isothermal profile for the lens. Based on data collected from 2007 to 2012 by the ANTARES neutrino telescope, the strongest constraint is obtained from the lensed quasar B0218+357, providing a limit on the total neutrino luminosity of this source of 1.08 x 10(46) erg s(-1) This limit is about one order of magnitude lower than those previously obtained in the ANTARES standard point source searches with non-lensed Flat-Spectrum Radio Quasars
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