[EN] Recent studies in plant virus evolution are revealing that genetic structure and behavior of virus and viroid populations can explain important pathogenic properties of these agents, such as host resistance breakdown, ...

[EN] Barley yellow dwarf virus (BYDV) species PAV occurs frequently in irrigated wheat fields worldwide and can be efficiently transmitted by aphids. Isolates of BYDV-PAV from different countries show great divergence both ...

[EN] The genetic variability and evolution of parietaria mottle virus (PMoV) of the genus Ilarvirus was studied by analyzing nucleotide sequences of 2b and CP genes from isolates collected in different countries. Phylogenetic ...

[ES] El melón, (Cucumis melo L.), es una especie hortícola perteneciente a la familia de la Cucurbitaceae, de origen asiático. Esta especie se consume normalmente por sus frutos, siendo muy apreciado por su alta variabilidad ...

This learning object describes the main characteristics of meiosis and the vegetal species Tradescantia pallida and explains the steps to observe cells at meiotic division in the laboratory in this species.

[EN] The physical origin of the open-circuit voltage in bulk heterojunction solar cells is still not well understood. While signi¿ cant evidence exists to indicate that the open-circuit voltage is limited by the molecular ...

[EN] The flow phenomena occurring during the planetary descent of a space vehicle is the main application of hypersonic aerothermodynamics. These flows are very difficult to compute, thus the aid of a reduced-order model ...