2,092 research outputs found
Study on the natural history of malaria in areas of the Rondonia State - Brazil and problems related to its control
AnĂĄlise microbiolĂłgica, fĂsico-quĂmica e sensorial do iogurte de leite bĂșfala integral e desnatado adoçado com mel de abelha.
Carcass quality of buffalo (Bubalus bubalis) finished in silvopastoral system in the Eastern Amazon, Brazil.
Avaliou-se a influĂȘncia da dieta sobre a qualidade de carcaça de bĂșfalos mestiços das raças Murrah e MediterrĂąneo, alimentados com concentrado tradicional milho/soja ou resĂduos agroindustriais tortas de coco e dendĂȘ. Os animais foram sacrificados em abatedouro comercial, e realizadas anĂĄlises fĂsicas e fĂsico-quĂmicas na carcaça, apĂłs 24 horas, e de cor e textura instrumentais no mĂșsculo Longissimus dorsi, apĂłs 48 horas de resfriamento. Os animais suplementados com a torta de dendĂȘ adquiriram melhor conformação de carcaça e acabamento de gordura, e observaram-se diferenças (P<0,05) no percentual de gordura na carcaça e na espessura de gordura de cobertura
Efeito das sobras de mandioca no ganho de peso de fĂȘmeas bovinas e bubalinas.
bitstream/item/33546/1/CPATU-CirTec2.pd
Limited risk of Zika virus transmission by five Aedes albopictus populations from Spain
Background: Aedes albopictus, the Asian tiger mosquito, is an exotic invasive species in Europe. It has substantial public health relevance due to its potential role in transmitting several human pathogens. Out of the European countries, Spain has one of the highest risk levels of autochthonous arbovirus transmission due to both the high density of Ae. albopictus and the extensive tourist influx from vector-endemic areas. This study aims to investigate the susceptibility of five Ae. albopictus populations from mainland Spain and the Balearic Islands to a Brazilian Zika virus (ZIKV) strain. Methods: The F1 generation of each Ae. albopictus population was orally challenged with a ZIKV-infected blood meal (1.8 Ă 10 PFU/ml). At 7 and 14 days post-infection (dpi), mosquito bodies (thorax and abdomen) and heads were individually analysed through RT-qPCR to determine the infection rate (IR) and dissemination rate (DR), respectively. The saliva of infected mosquitoes was inoculated in Vero cells and the transmission rate was assessed by plaque assay or RT-qPCR on âŒ33 individuals per population. Results: The IR and DR ranged between 12-88%, and 0-60%, respectively, suggesting that ZIKV is capable of crossing the midgut barrier. Remarkably, no infectious viral particle was found in saliva samples, indicating a low ability of ZIKV to overcome the salivary gland barrier. A subsequent assay revealed that a second non-infective blood meal 48 h after ZIKV exposure did not influence Ae. albopictus vector competence. Conclusions: The oral experimental ZIKV infections performed here indicate that Ae. albopictus from Spain become infected and disseminate the virus through the body but has a limited ability to transmit the Brazilian ZIKV strain through biting. Therefore, the results suggest a limited risk of autochthonous ZIKV transmission in Spain by Ae. albopictus
Ăndices de conforto tĂ©rmico desenvolvidos para bĂșfalas criadas em clima tropical quente e Ășmido.
Para desenvolver Ăndices de conforto tĂ©rmico para bubalinos, foram utilizadas 20 bĂșfalas Murrah, criadas na AmazĂŽnia Oriental, durante um ano. Foram mensuradas temperatura do ar (TA), umidade relativa do ar (UR), temperatura de ponto de orvalho (TPO) e temperatura de globo negro (TGN), alĂ©m das variĂĄveis fisiolĂłgicas temperatura retal (TR), frequĂȘncia respiratĂłria (FR) e temperatura da pele (TP). Foram feitas anĂĄlises de regressĂŁo multivariadas, utilizando-se o modelo de correlaçÔes canĂŽnicas. Foram determinados dois pares de Ăndices (Geral e PrĂĄtico), contendo o Indicativo das CondiçÔes ClimĂĄticas de Conforto de BĂșfalas (ICCCB) e o Indicativo do Conforto Ambiental para BĂșfalas (ICAB). A interpretação dos resultados Ă© dada em escalas que indicam conforto, perigo, estresse e emergĂȘncia. Os Ăndices foram validados e podem ser utilizados, em pares, para diagnĂłstico de estresse tĂ©rmico em bubalinos na regiĂŁo amazĂŽnica
Efeito da densidade de plantas na incidĂȘncia de podridĂŁo branca em cebola.
O objetivo deste estudo foi avaliar o efeito do adensamento de plantas na incidĂȘncia de podridĂŁo branca em cebola em solo naturalmente contaminado com o patĂłgeno.bitstream/item/201079/1/BPD-183-15-08-2019-1.pd
Structure of Anopheles (Diptera: Culicidae) population in areas with different degrees of human settlement: CantĂĄ - Roraima - Brazil
Performance of intraspecific hybrids (Kouillou x Robusta) of Coffea canephora Pierre.
The experiment was carried out in 2005 in the municipality of Ouro Preto do Oeste at the experimental station of Embrapa RondĂŽnia. 256 genotypes were evaluated, from nine hybridizations among parents of Kouillou (Cpafro 121, Cpafro 194, Cpafro 199 and Emcapa 03) and Robusta (Robusta 1675, Robusta 2258 and Robusta 640). The experimental design was a randomized complete block design, where each cross was represented by a maximum of 32 plants, distributed in four replications. The spacing used was 3.5 x 1.5 m. The average of six harvests and the yield of hulled coffee was 74.90 bags ha-1. Highlight for progeny is Emcapa 03 x Cpafro 194 with average yield of 97.71 bags ha-1. The estimated heritability observed for yield of coffee benefited, was 78.96%. The evaluation of six production seasons was allowed to verify the reliability of the genetic parameters in each set of crops. It was possible to observe that only the evaluation of the 1st and 2nd crops would be enough to estimate the genetic parameters with efficiency, with a coefficient of determination (R2) of 79.10%. With the inclusion of the 3rd crop, R2 estimates rose to 81.10%. The individual evaluations (per plant) carried out in 2006/2007, 2007/2008 and 2008/2009 crops showed the superiority of the plants from crosses 7, 8 and 9. In relation to resistance of orange rust, most of the genotypes were resistant to disease, and 75% of the genotypes did not present any type of infection symptoms. Among the susceptible genotypes, there was a variation between 1 and 15% in the degree of lesion intensity
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