910 research outputs found
Equation of motion for dislocations with inertial effects
An approximate equation of motion is proposed for screw and edge
dislocations, which accounts for retardation and for relativistic effects in
the subsonic range. Good quantitative agreement is found, in accelerated or in
decelerated regimes, with numerical results of a more fundamental nature.Comment: 6 pages, 4 figures, LaTe
Search for Neutron Flux Generation in a Plasma Discharge Electrolytic Cell
Following some recent unexpected hints of neutron production in setups like
high-voltage atmospheric discharges and plasma discharges in electrolytic
cells, we present a measurement of the neutron flux in a configuration similar
to the latter. We use two different types of neutron detectors,
poly-allyl-diglicol-carbonate (PADC, aka CR-39) tracers and Indium disks. At
95% C.L. we provide an upper limit of 1.5 neutrons cm^-2 s^-1 for the thermal
neutron flux at ~5 cm from the center of the cell. Allowing for a higher energy
neutron component the largest allowed flux is 64 neutrons cm^-2 s^-1. This
upper limit is two orders of magnitude smaller than what previously claimed in
an electrolytic cell plasma discharge experiment. Furthermore the behavior of
the CR-39 is discussed to point our possible sources of spurious signals.Comment: 4 pages, 3 figure
Metodologias de extração e avaliação semi quantitativa da expressão de genes de metabolismo secundário do milho (Zea mays L.).
bitstream/item/30587/1/boletim-117.pd
Fauna edáfica em um argissolo cultivado com mamona (Ricinus communis L.) sob diferentes sistemas de manejo.
Application of the 2D heterospectral correlation spectroscopy (13C NMR × EPR) in brazilian soils from reclaimed oil shale mining Area.
Teores de carbono orgânico total e distribuição relativa em macro e microagregados de um latossolo vermelho cultivado com cana-de-açúcar no rio grande do sul.
Estoque e caracterização por FTIR e DRUV-VIS da fração grosseira da matéria orgânica em agregados de um argissolo sob eucalipto e pastagem.
bitstream/item/39856/1/boletim-123.pd
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