426 research outputs found
Avaliação de cultivares de trigo de duplo propósito, recomendados para cultivo no estado do Rio Grande do Sul.
bitstream/CNPT-2010/37413/1/Comunicado-137.pd
Avaliação de cultivares de trigo de duplo propósito, recomendados para cultivo no estado do Rio Grande do Sul.
bitstream/item/31090/1/Comunicado-137.pd
Resultados da experimentação de genótipos de trigo para aptidão a duplo propósito no Paraná, em 2000.
bitstream/item/84114/1/CNPT-BOL.-PESQ.-6-01.pd
Experimentação de genótipos de trigo para duplo propósito no Paraná, em 1999.
Introdução; Material e métodos; Resultados e discussão; Matéria verde; Matéria seca; Rendimento de grãos; Ciclo e altura; Características agronômicas.bitstream/item/157857/1/FL-07263.pd
Biochemical and cytological interactions between callose synthase and microtubules in the tobacco pollen tube
Key message: The article concerns the association between callose synthase and cytoskeleton by biochemical and ultrastructural analyses in the pollen tube. Results confirmed this association and immunogold labeling showed a colocalization. Abstract: Callose is a cell wall polysaccharide involved in fundamental biological processes, from plant development to the response to abiotic and biotic stress. To gain insight into the deposition pattern of callose, it is important to know how the enzyme callose synthase is regulated through the interaction with the vesicle-cytoskeletal system. Actin filaments likely determine the long-range distribution of callose synthase through transport vesicles but the spatial/biochemical relationships between callose synthase and microtubules are poorly understood, although experimental evidence supports the association between callose synthase and tubulin. In this manuscript, we further investigated the association between callose synthase and microtubules through biochemical and ultrastructural analyses in the pollen tube model system, where callose is an essential component of the cell wall. Results by native 2-D electrophoresis, isolation of callose synthase complex and far-western blot confirmed that callose synthase is associated with tubulin and can therefore interface with cortical microtubules. In contrast, actin and sucrose synthase were not permanently associated with callose synthase. Immunogold labeling showed colocalization between the enzyme and microtubules, occasionally mediated by vesicles. Overall, the data indicate that pollen tube callose synthase exerts its activity in cooperation with the microtubular cytoskeleton
Virtual Next-to-Leading Corrections to the Impact Factors in the High-Energy Limit
We compute the virtual next-to-leading corrections to the impact factors or
off-shell coefficient functions in the high-energy limit. When combined with
the known real corrections, these results will provide the complete NLO
corrections to the impact factors, which are necessary to use the BFKL
resummation at NLL for jet production at both lepton-hadron and hadron-hadron
colliders.Comment: LaTeX, 23 page
Defeitos em grãos de trigo.
bitstream/item/84090/1/CNPT-DOCUMENTOS-34-DEFEITOS-EM-GRAOS-DE-TRIGO-FL-13597a.pd
Dijet Production at Hadron--Hadron Colliders in the BFKL Approach
The production in high-energy hadron collisions of a pair of jets with large
rapidity separation is studied in an improved BFKL formalism. By recasting the
analytic solution of the BFKL equation as an explicit order-by-order sum over
emitted gluons, the effects of phase space constraints and the running coupling
are studied. Particular attention is paid to the azimuthal angle decorrelation
of the jet pair. The inclusion of sub-leading effects significantly improves
the agreement between the theoretical predictions and recent preliminary
measurements from the Dzero collaboration.Comment: 19 pages LaTeX; one figure corrected; conclusions unchange
Differential equations for multi-loop integrals and two-dimensional kinematics
In this paper we consider multi-loop integrals appearing in MHV scattering
amplitudes of planar N=4 SYM. Through particular differential operators which
reduce the loop order by one, we present explicit equations for the two-loop
eight-point finite diagrams which relate them to massive hexagons. After the
reduction to two-dimensional kinematics, we solve them using symbol technology.
The terms invisible to the symbols are found through boundary conditions coming
from double soft limits. These equations are valid at all-loop order for double
pentaladders and allow to solve iteratively loop integrals given lower-loop
information. Comments are made about multi-leg and multi-loop integrals which
can appear in this special kinematics. The main motivation of this
investigation is to get a deeper understanding of these tools in this
configuration, as well as for their application in general four-dimensional
kinematics and to less supersymmetric theories.Comment: 25 pages, 7 figure
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