Epidemiological measurements in banana genotypes inoculated with Mycosphaerella musicola.

In order to define the most important variables in disease progression, it is necessary to know the details of the monocycle of the pathogen. Incubation periods and establishment of Sigatoka leaf spot, caused by Mycosphaerella musicola, are strongly influenced by climatic factors and by genotype

Comparison of a retrotransposon-based marker with microsatellite markers for discriminating accessions of Vitis vinifera.

201

Population pulsation resonances of excitons in monolayer MoSe2 with sub 1 {\mu}eV linewidth

Monolayer transition metal dichalcogenides, a new class of atomically thin semiconductors, possess optically coupled 2D valley excitons. The nature of exciton relaxation in these systems is currently poorly understood. Here, we investigate exciton relaxation in monolayer MoSe2 using polarization-resolved coherent nonlinear optical spectroscopy with high spectral resolution. We report strikingly narrow population pulsation resonances with two different characteristic linewidths of 1 {\mu}eV and <0.2 {\mu}eV at low-temperature. These linewidths are more than three orders of magnitude narrower than the photoluminescence and absorption linewidth, and indicate that a component of the exciton relaxation dynamics occurs on timescales longer than 1 ns. The ultra-narrow resonance (<0.2 {\mu}eV) emerges with increasing excitation intensity, and implies the existence of a long-lived state whose lifetime exceeds 6 ns.Comment: (PRL, in press

Efeito de períodos de vernalização de alho (Allium sativum L.) sobre a cultivar Roxo Pérola de Caçador "in vitro".

Suplemento. Edição de Resumos expandidos e palestras do 43. Congresso Brasileiro de Olericultura, Recife, jul. 2003