Início de tuberização de genótipos de batata em sistema hidropônico.

O objetivo do trabalho foi caracterizar o início da tuberização (IT) de genótipos de batata em sistema hidropônico.CBO

BN domains included into carbon nanotubes: role of interface

We present a density functional theory study on the shape and arrangement of small BN domains embedded into single-walled carbon nanotubes. We show a strong tendency for the BN hexagons formation at the simultaneous inclusion of B and N atoms within the walls of carbon nanotubes. The work emphasizes the importance of a correct description of the BN-C frontier. We suggest that BN-C interface will be formed preferentially with the participation of N-C bonds. Thus, we propose a new way of stabilizing the small BN inclusions through the formation of nitrogen terminated borders. The comparison between the obtained results and the available experimental data on formation of BN plackets within the single walled carbon nanotubes is presented. The mirror situation of inclusion of carbon plackets within single walled BN nanotubes is considered within the proposed formalism. Finally, we show that the inclusion of small BN plackets inside the CNTs strongly affects the electronic character of the initial systems, opening a band gap. The nitrogen excess in the BN plackets introduces donor states in the band gap and it might thus result in a promising way for n-doping single walled carbon nanotubes

Caracterização de Cultivares e Clones de Batata quanto ao Formato de Tubérculo, Teor de Matéria Seca e Glicose.

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Potencial produtivo e qualidade industrial de clones de batata.

O objetivo deste trabalho foi avaliar o desempenho de clones avançados de batata quanto a rendimento de tubérculos e caracteres de qualidade industrial, visando a identificação daqueles com maior potencial para esse segmento de mercado. Foram avaliados dez clones do Programa de Melhoramento Genético da Embrapa (F21-07-09, F97-07-04, F102-07-22, F110-07-01, F156-07-19, F161-07-02, F50-08-01, F131-08-06, F131-08-26, F183-08-01), em comparação com as cultivares Agata e Asterix. O experimento foi conduzido durante as safras de outono de 2015 e 2016 em Pelotas, RS. O delineamento experimental foi em blocos ao acaso, com quatro repetições. Foram avaliados os seguintes caracteres de rendimento: massa total de tubérculos, massa de tubérculos comerciais, massa média de tubérculos, porcentagem de massa de tubérculos comerciais; e os seguintes caracteres de qualidade industrial: peso específico, teor de glicose e cor de fritura (?chips?). Em rendimento de tubérculos comerciais e características de qualidade de processamento industrial, destacou-se o clone F21-07-09, seguido dos clones F183-08-01, F161-07-02 e F131-08-26.bitstream/item/218036/1/Boletim-336-final.pd

Natural history of Arabidopsis thaliana and oomycete symbioses

Molecular ecology of plant–microbe interactions has immediate significance for filling a gap in knowledge between the laboratory discipline of molecular biology and the largely theoretical discipline of evolutionary ecology. Somewhere in between lies conservation biology, aimed at protection of habitats and the diversity of species housed within them. A seemingly insignificant wildflower called Arabidopsis thaliana has an important contribution to make in this endeavour. It has already transformed botanical research with deepening understanding of molecular processes within the species and across the Plant Kingdom; and has begun to revolutionize plant breeding by providing an invaluable catalogue of gene sequences that can be used to design the most precise molecular markers attainable for marker-assisted selection of valued traits. This review describes how A. thaliana and two of its natural biotrophic parasites could be seminal as a model for exploring the biogeography and molecular ecology of plant–microbe interactions, and specifically, for testing hypotheses proposed from the geographic mosaic theory of co-evolution

Transverse-momentum-dependent Multiplicities of Charged Hadrons in Muon-Deuteron Deep Inelastic Scattering

A semi-inclusive measurement of charged hadron multiplicities in deep inelastic muon scattering off an isoscalar target was performed using data collected by the COMPASS Collaboration at CERN. The following kinematic domain is covered by the data: photon virtuality $Q^{2}>1$ (GeV/$c$)$^2$, invariant mass of the hadronic system $W > 5$ GeV/$c^2$, Bjorken scaling variable in the range $0.003 < x < 0.4$, fraction of the virtual photon energy carried by the hadron in the range $0.2 < z < 0.8$, square of the hadron transverse momentum with respect to the virtual photon direction in the range 0.02 (GeV/$c)^2 < P_{\rm{hT}}^{2} < 3$ (GeV/$c$)$^2$. The multiplicities are presented as a function of $P_{\rm{hT}}^{2}$ in three-dimensional bins of $x$, $Q^2$, $z$ and compared to previous semi-inclusive measurements. We explore the small-$P_{\rm{hT}}^{2}$ region, i.e. $P_{\rm{hT}}^{2} < 1$ (GeV/$c$)$^2$, where hadron transverse momenta are expected to arise from non-perturbative effects, and also the domain of larger $P_{\rm{hT}}^{2}$, where contributions from higher-order perturbative QCD are expected to dominate. The multiplicities are fitted using a single-exponential function at small $P_{\rm{hT}}^{2}$ to study the dependence of the average transverse momentum $\langle P_{\rm{hT}}^{2}\rangle$ on $x$, $Q^2$ and $z$. The power-law behaviour of the multiplicities at large $P_{\rm{hT}}^{2}$ is investigated using various functional forms. The fits describe the data reasonably well over the full measured range.Comment: 28 pages, 20 figure