Reproductive performance of sows inseminated with semen doses stored for up to seven days in long-term extender in a field condition

This study aimed to evaluate the reproductive performance of sows inseminated with semen doses preserved at 15-18 degrees C for up to seven days in long-term extender (Duragen (R)). Parity one (PO1) to PO7 sows were randomly assigned to the following groups: AI1-3 (n=190), insemination with semen doses stored between one and three days; and AI5-7 (n=124), insemination with semen doses stored between five and seven days. Sows were submitted to estrus detection twice a day. Post-cervical insemination according to weaning-to-estrus interval was performed. The farrowing rate (FR) did not differ between the groups (AI1-3=83.2%; AI5-7=82.2%; p>0.05) nor did the total number of piglets born (TPB; AI1-3=14.2 +/- 0.3; AI5-7=14.5 +/- 0.3; p>0.05). Considering the semen dose most likely responsible for fertilization according to its storage time (1, 2-3, 5, and 6-7 days), the FR (72.7%, 87.8%, 85.7%, and 79%, respectively) and TPB (14.4, 14.0, 14.9, and 13.5, respectively) were similar among the groups (p>0.05). In conclusion, the use of semen doses extended with long-term extender stored for up to seven days did not impair the reproductive performance of sows. Therefore, it''s using could optimize production efficiency and logistics of semen dose deliveries to sow farms

A influência da salinidade na simbiose de microrganismos benéficos: o caso do feijão caupi

A salinização do solo é um fator limitante para a produção agrícola, podendo diminuir significativamente a capacidade de desenvolvimento vegetativo e consequentemente a qualidade dos produtos, mesmo no caso de culturas consideradas resistentes, como a leguminosa feijão-caupi. Além disso, altos teores de sal também afetam o comportamento da microbiota do solo, reduzindo a interação das plantas com microrganismos benéficos, como os fungos micorrizíco arbusculares (FMAs) e os rizóbios. Assim, avaliar o impacto causado pela salinidade na associação planta-FMA- rizóbio e apontar as variáveis que poderão afetar a cultura do feijão-caupi é o principal objetivo deste trabalho. O delineamento experimental foi em blocos casualizados em casa de vegetação. Os tratamentos foram: controle (sem adição de sal) e solos com diferentes condutividades elétrica (CE), são elas: 1,0 dS m–1; 2,0 dS m–1; 3,0 dS m–1; 4,0 dS m–1; 5,0 dS m–1. Os resultados apontaram que tanto as interações com os microrganismos, quanto o desenvolvimento vegetal foi afetado, com destaque para os valores a partir de 4,0 dS m–1 de condutividade elétrica, sendo que o maior impacto foi notado pela CE 5,0 dS m–1

Evidence of Color Coherence Effects in W+jets Events from ppbar Collisions at sqrt(s) = 1.8 TeV

We report the results of a study of color coherence effects in ppbar collisions based on data collected by the D0 detector during the 1994-1995 run of the Fermilab Tevatron Collider, at a center of mass energy sqrt(s) = 1.8 TeV. Initial-to-final state color interference effects are studied by examining particle distribution patterns in events with a W boson and at least one jet. The data are compared to Monte Carlo simulations with different color coherence implementations and to an analytic modified-leading-logarithm perturbative calculation based on the local parton-hadron duality hypothesis.Comment: 13 pages, 6 figures. Submitted to Physics Letters