2,737 research outputs found
Ganho de peso bovino em resteva de arroz irrigado na safra de 2009/2010 na Embrapa Pecuária Sul.
bitstream/item/31962/1/DT-102online.pd
Analysis of the economic viability from an integrated system of rice and beef cattle in the Pampa Biome of Rio Grande do Sul.
The environmental conditions of the Pampa Biome are favorable to the degradation of soil, especially when grain crops are introduced in this region, traditionally exploited with beef cattle systems
Raising Brangus steers on natural pasture developed after irrigated rice crop in the Pampa biome of Rio Grande do Sul state, Brazil.
The traditional systems of exploitation with beef cattle in the Pampa biome of Rio Grande do Sul presents historically low rates of productivity and profitability due, mainly, to the inadequate management of natural pastures
Spin-1/2 "bosons" with mass dimension 3/2 and fermions with mass dimension 1 cannot represent physical particle states
We delve into the first principles of quantum field theory to prove that the so-called spin-1/2 "bosons" and the fermions with mass dimension 1, including ELKO, cannot represent physical particle states with spin 1/2. Specifically, we first demonstrate that both aforementioned fields are not invariant under rotational symmetry, which implies that the particles created for these fields are not eigenstates of the spin operator in the (1/2, 0) circle plus (0, 1/2) representation of the Lorentz group, nor is it possible to construct a Hamiltonian density scalar under the rotational group from them. Furthermore, following Weinberg's approach to local causal fields, we prove that regardless of any discrete symmetry or adjoint structure, the relativistic fields in the (1/2, 0) circle plus (0, 1/2) representation satisfy the Fermi-Dirac statistics in complete agreement with the well-established spin-statistics theorem and experimental results.Peer reviewe
Concentração e época de aplicação de AminoetoxiVinilGlicine (AVG) na maturação de macieiras 'Fuji Suprema'.
bitstream/item/45481/1/ADM11003.pd
Viabilidade do uso da previsão no controle da requeima (Phytophthora infestans) em batata nas regiões de Pelotas e São Lourenço do Sul - RS.
bitstream/item/31572/1/comunicado75.pd
Reinstatement of Morphine-Induced Conditioned Place Preference in Mice by Priming Injections
To construct a model of relapse of drug
abuse in mice, the induction, we evaluated the
extinction and reinstatement of morphine-induced
place preference. In Experiment 1, we
examined the effects of morphine (0, 2, 3, 5, 10,
20 and 40 mg/kg) in the conditioned place
preference (CPP) paradigm. Mice showed CPP
with 5, 10, 20 and 40 mg/kg. In Experiment 2,
we evaluated the effects of two different extinction
procedures. After conditioning with 40
mg/kg of morphine, the mice underwent daily
extinction sessions of 60 or 15 min of duration.
CPP was extinguished after seven and nine
sessions, respectively. In Experiment 3, we
tested the reinstating effects of several priming
doses of morphine. Mice were conditioned with
40 mg/kg of morphine and underwent the daily
15 min extinction sessions until CPP was no
longer evident. Then, the effects of morphine (0,
2, 3, 5, 10, 20, 40 mg/kg, i.p.) were evaluated.
CPP was reinstated by doses from 5 mg/kg
upward. The results show that morphine priming
injections are effective in reactivating opiateseeking
behavior in mice, and thus, the CPP
paradigm might be useful to investigate the
mechanisms underlying relapse of drug abuse
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