820 research outputs found
Search for low-mass WIMPs in a 0.6 kg day exposure of the DAMIC experiment at SNOLAB
We present results of a dark matter search performed with a 0.6 kg day
exposure of the DAMIC experiment at the SNOLAB underground laboratory. We
measure the energy spectrum of ionization events in the bulk silicon of
charge-coupled devices down to a signal of 60 eV electron equivalent. The data
are consistent with radiogenic backgrounds, and constraints on the
spin-independent WIMP-nucleon elastic-scattering cross section are accordingly
placed. A region of parameter space relevant to the potential signal from the
CDMS-II Si experiment is excluded using the same target for the first time.
This result obtained with a limited exposure demonstrates the potential to
explore the low-mass WIMP region (<10 GeV/) of the upcoming DAMIC100, a
100 g detector currently being installed in SNOLAB.Comment: 11 pages, 11 figure
Search for microwave emission from ultrahigh energy cosmic rays
We present a search for microwave emission from air showers induced by
ultrahigh energy cosmic rays with the microwave detection of air showers
experiment. No events were found, ruling out a wide range of power flux and
coherence of the putative emission, including those suggested by recent
laboratory measurements.Comment: 5 pages, 3 figure
Validação de marcadores moleculares associados à resistência parcial a Magnaporthe oryzae para aplicação em seleção assistida por marcadores (SAM).
O objetivo deste trabalho foi validar os seis marcadores na população de seleção recorrente CNA6, para posterior aplicação destes em SAM
Validação de marcadores moleculares associados à resistência parcial a Magnaporthe oryzae para aplicação em seleção assistida por marcadores (SAM).
O objetivo deste trabalho foi validar os seis marcadores na população de seleção recorrente CNA6, para posterior aplicação destes em SAM. Para tanto, foram coletadas folhas de 223 plantas da população para extração de DNA por lise alcalina
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