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Atributos físicos do solo e produtividade do milho sob sistemas de manejo e adubações
(Universidade Federal da Paraíba (UFPB) Ccsa, 2011-08-01)
No-tillage system is an efficient technique in control of soil erosion, when compared with conventional tillage, however, some studies indicate higher compaction under no-tillage, mainly in the surface layer. Strategies ...
Ticks (Acari: Ixodidae) within various phytophysiognomies of a Cerrado reserve in UberlA cent ndia, Minas Gerais, Brazil
(Springer, 2010-02-01)
Cerrado biome, the South American savannah, covers about 2 million km(2) and is very rich in endemic species but threatened by agriculture. In this report free-living tick species are presented, and their seasonal and ...
Structural characterization of the cell wall D-glucans isolated from the mycelium of Botryosphaeria rhodina MAMB-05
(Elsevier B.V., 2008-03-17)
Three D-glucans were isolated from the mycelium of the fungus Botryosphaeria rhodina MAMB-05 by sequential extraction with hot-water and hot aqueous KOH (2% w/v) followed by ethanol precipitation. Following their purification ...
alpha-SiAlON ceramics with elongated grain morphology using an alternative sintering additive
(Elsevier B.V., 2004-04-01)
In this work, the use of a natural yttrium oxide and rare earth oxide solid solution (CRE2O3) as stabilizers of the alpha-Si3N4 phase to form alpha-SiAlON has been investigated. This oxide mix is produced at FAENQUIL-DEMAR, ...
Efficient plasmonic coupling between Er3+:(Ag/Au) in tellurite glasses
(Elsevier B.V., 2012-01-15)
We report a systematic study of the localized surface plasmon resonance effects on the photoluminescence of Er3+-doped tellurite glasses containing Silver or Gold nanoparticles. The Silver and Gold nanoparticles are obtained ...
Ferroelectric materials with photoluminescent properties
(Taylor & Francis Ltd, 2003-01-01)
Amorphous LiNbO3 thin films processed by polymeric precursor method exhibited efficient luminescence at room temperature. The films were deposited on silicon substrates and treated at 200degreesC for different times. The ...
DFT study of the reaction between VO2+ and C2H6
(Amer Chemical Soc, 2004-02-16)
The molecular mechanisms of the reaction VO2+ ((1)A(1)/(3)A'') + C2H6 ((1)A(g)) to yield V(OH)(2)(+) ((1)Sigma(+)/(3)Sigma(-)) + C2H4 ((1)A(g)) and/or VO+ ((1)Delta/(3)Sigma) + H2O ((1)A(1)) + C2H4 (Ag-1) have been ...
Genetic variation within and among species of genus Arachis, section Rhizomatosae
(Kluwer Academic Publ, 2004-05-01)
The genus Arachis is endemic to South America and comprises 80 species, 69 of which have already been described and eleven not yet published. The genus includes the cultivated peanut ( A. hypogaea) and several forage ...
An eco-friendly protocol for synthesis of thiourea derivatives: 1-benzoyl-3-benzylguanidine and 1-benzoyl-3-benzyl-O-ethylisourea. A possible non-purely thermal microwave assisted reaction
(Elsevier B.V., 2006-03-13)
1-Benzoyl-3-benzylguanidine and 1-benzoyl-3-benzyl-O-ethylisourea were synthesized in good yields (68 and 76%, respectively) from 1-benzoyl-3-benzylthiourea and benzoyl-ethylthiocarbamate in dry media conditions using ...
Structural behaviour of three-pile caps subjected to axial compressive loading
(Springer, 2008-01-01)
This work presents a comparative analysis about the behaviour of pile caps supported by 3 piles subjected to axial loading. Piles with 20 cm and 30 cm diameters were analysed. The main reinforcement was maintained in all ...