Collision of a sphere onto a wall coated with a liquid film

Particle-particle and particle-wall collisions occur in many natural and industrial applications such as sedimentation, agglomeration, and granular flows. To accurately predict the behavior of particulate flows, fundamental knowledge of the mechanisms of a single collision is required. In this fluid dynamics video, particle-wall collisions onto a wall coated with 1.5% poly(ethylene-oxide) (PEO) (viscoelastic liquid) and 80% Glycerol and water (Newtonian liquid) are shown.Comment: 1 page, no figure

Competição de leguminosas introduzidas no agreste de Pernambuco - município de Surubim.

Efeito da adubação fosfatada em 3 níveis e a variação na produção de massa verde nas estações seca e chuvosa

Construção de mapa genético e análise comparativa entre cruzamentos interespecíficos de Oryza glumaepatula x Oryza sativa utilizando marcadores microssatélites.

Este trabalho objetivou: 1) desenvolver um mapa genético baseado em marcadores SSR para o cruzamento interespecífico Oryza sativa (Cica 8) x Oryza glumaepatula (RS-16); 2) avaliar a conservação da ligação e ordem dos locos SSR entre dois mapas interespecíficos, os quais possuem o parental RS-16 em comum; 3) genotipar 118 famílias na geração RC2F1 obtida a partir do cruzamento interespecífico entre Oryza sativa (Cica 8) e Oryza glumaepatula (RS-16)

Squeezing generation and revivals in a cavity-ion system in contact with a reservoir

We consider a system consisting of a single two-level ion in a harmonic trap, which is localized inside a non-ideal optical cavity at zero temperature and subjected to the action of two external lasers. We are able to obtain an analytical solution for the total density operator of the system and show that squeezing in the motion of the ion and in the cavity field is generated. We also show that complete revivals of the states of the motion of the ion and of the cavity field occur periodically.Comment: 9 pages, 3 figure

Cultivar BR 4: uma nova opção de arroz de sequeiro para o Amapá.

A Embrapa, através da Unidade de Execução de Pesquisa de Âmbito Territorial de Macapá (UEPAT de Macapá), introduziu e avaliou experimentalmente, a partir de 1982, a cultivar BR 4 no Território, alcançando bons resultados em experimentos de competição e em plantios demonstrativos conduzidos em áreas de mata de terra firme e cerrado, o qual motivou sua recomendação para cultivo no Território.bitstream/item/64924/1/AP-1985-cultivcar-nova-opcao-arroz-sequeiro.pd

Caracterização molecular de linhagens de introgressão do cruzamento interespecífico Oryza sativa x O. glumaepatula por marcadores SSR fluorescentes.

Este trabalho teve como objetivo realizar a caracterização molecular de 114 linhagens de Introgressão RC2F9 derivadas do cruzamento O. sativa Cica-8 x O. glumaepatula RS-16

Selection of rice genotypes with greater seedling vigor under controlled conditions.

This study aimed to identify allele sources for seedling vigour in 65 rice genotypes, using the slantboard test in a germination chamber, and to determine the best parameter for evaluating seedling vigour. The experiment was arranged in the randomized block design with three replicate blocks. Root and primary leaf length data were collected from seedlings grown in the dark at 18 degrees C, 15 days after sowing and at 25 degrees C, ten days after sowing. The best performing genotypes for seedling vigour were included in Group 2, which contained red rice accessions. The vigour was best evaluated under controlled conditions (grown at 18 degrees C, 15 days after sowing) through measurements of roots and primary leaves.

Utilização de marcadores moleculares em programas de ampliação da base genética de espécies cultivadas.

Introdução; Utilização de germoplasma em programas de melhoramento genético; Determinação da variabilidade genética em acessos do banco de germoplasma; Cruzamentos amplos; Marcadores moleculares no melhoramento de plantas; Obtenção de mapas moleculares; Mapeamento de QTLs; Análise de AB-QTLs; Seleção assistida por marcadores; Considerações finais.bitstream/CNPAF/21787/1/doc_155.pd

Development of rice lines with gene introgression from the wild Oryza glumaepatula by the AB-QTL methodology.

Wild rice of the species Oryza glumaepatula is found Brazil and has been used to broaden the genetic basis of irrigated rice populations in Embrapa breeding programmes. The objective of this study was to demonstrate and discuss approaches used in the development of Oryza sativa lines containing genes transferred from Oryza glumaepatula, resulting in introgression lines with a broader genetic basis and high yield. First of all, genes were transferred from the wild species to cultivated rice by the AB-QTL methodology. Eighteen families were selected using QTL analysis and agronomical performance data. After the heterosis test, the families CNAi 9020 and CNAi 9024 were selected and submitted to microsatellite marker-assisted selection. Thirty-five lines were then selected with high plant vigour, high tiller and panicle number per plant, high grain yield of the main crop, and a strong regrowth capacity which makes the use of ratoons a feasible alternative