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Da Silva S.R.M.,Unidade de Taguatinga | Maldonade I.R.,EMBRAPA - Empresa Brasileira de Pesquisa Agropecuaria | Ginani V.C.,University of Brasilia | Lima S.A.,Empresa de Assistencia Tecnica e Extensao Rural | And 5 more authors.
Revista da Sociedade Brasileira de Medicina Tropical | Year: 2014

Introduction: This study evaluated the presence of pathogenic human parasites on field-grown strawberries in the Federal District of Brazil. Methods: A total of 48 samples of strawberries and 48 soil samples from 16 properties were analyzed. Results: Contaminated strawberries were detected in 56% of the properties. Schistosoma mansoni, Ascaris lumbricoides or Ascaris suum, Balantidium coli, Endolimax nana, and Entamoeba spp. were detected. Soil was contaminated with Entamoeba spp., Entamoeba coli, Strongyloides spp., Ancylostomatidae, and Hymenolepis nana. Conclusions: Producers should be instructed on the safe handling of strawberries in order to reduce the incidence of strawberries that are contaminated with enteroparasites. © 2014, Sociedade Brasileira de Medicina Tropical. All Rights Reserved. Source

Gabbi A.M.,Federal University of Rio Grande do Sul | McManus C.M.,University of Brasilia | Stumpf M.T.,Grande Rio University | Barbosa R.S.,Embrapa Semiarido | And 4 more authors.
Tropical Animal Health and Production | Year: 2016

Data from five experiments with dairy cows where feed was restricted to 0, 40, and 50 % of the ad libitum amount, with 259 observations, were subjected to multivariate analyses to determine the effects of severity and duration of feed restriction on production, physical-chemical characteristics, ethanol stability, and somatic cell score of milk. A negative relationship was seen between the severity and duration of feed restriction with milk production, lactose content, titratable acidity, and milk stability to the ethanol test. The milk stability to the ethanol test, protein content, milk yield, and somatic cells score were the most important attributes retained by the discriminant analysis. Milk stability to the ethanol test, live weight, days in restriction, and pH were the most important characteristics explaining the variance within the different levels of feed restriction. Milk production and ethanol stability were significantly lower in both levels of feed restriction compared with the group fed ad libitum. When feed restriction was followed by refeeding, the difference observed in ethanol stability was the first discriminant variable, followed by the difference in unstable milk frequency and titratable acidity. Increments in the severity and duration of feed restriction negatively affect milk production and milk ethanol stability. © 2015, Springer Science+Business Media Dordrecht. Source

De Oliveira Freire A.L.,Federal University of Campina Grande | Saraiva V.P.,Empresa de Assistencia Tecnica e Extensao Rural | De Miranda J.R.P.,Federal University of Campina Grande | Bruno G.B.,Federal University of Paraiba
Semina:Ciencias Agrarias | Year: 2010

Tomato (Lycopersicon esculentum Mill.) is one of the most consumed vegetables in the world. In Paraiba State, the yield is bellow the national average, and the salinity has contributed for this. This work aimed to evaluate the salinity effects in growth, plant nutrition and yield on two tomato cultivars. Santa Adelia and Meia Estaca cultivars were irrigated with saline water (0.4; 1.5; 3.0; 3.5; and 6.0 dS m-1), in a 2x5 factorial design, with 3 replications. Shoots and roots dry matter, the relative growth rate, N, K, Ca, Mg, S, and Na contents in the leaves, and fruits yield were analyzed. The salinity reduced shoot dry matter in Santa Adelia cultivar. Both cultivars had different behaviors related to leaf ion contents. The salinity reduced the fruit yield. Meia Estaca cultivar was more salt tolerant than Santa Adelia cultivar. Source

Das Gracas C.P.,Empresa de Assistencia Tecnica e Extensao Rural | Lim A.I.P.G.,Medico Veterinario Autonomo | Fidelis A.A.G.,Medico Veterinario Autonomo | Cardoso J.R.,Federal University of Goais | And 2 more authors.
Ciencia Animal Brasileira | Year: 2013

The aim of this study was to evaluate the efficacy of methyl-formamide in ram semen cryopreservation. The semen pool used in this experiment was obtained by artificial vagina collection from four mixed breed Santa Inês rams, around four years of age. Semen collection was performed once a week, during six weeks. Each week corresponded to one experiment replication. The semen pool was divided in five fractions in order to be diluted in one of the following freezing media: (1) tris-egg yolk with 5.3% of glycerol (TG5.3G); (2) tris-egg yolk with 3% of methyl-formamide (TG3MF); tris-egg yolk with 5% of methyl-formamide (TG5MF); tris-egg yolk with 7% of methyl-formamide (TG7MF); tris-egg yolk with 9% of methyl-formamide (TG9MF). Semen progressive motility, vigor and thermoresistance were evaluated. The treatments TG5.3G (50%) and TG3MF (38%) showed higher progressive motility after thawing, while TG5MF (29%), TG7MF (1%) and TG9MF (6%) showerd lower motility. Freezing media containing methyl-formamide were less effective in preserving spermatozoa membrane integrity and morphology than control media. In TG7MF and TG9MF extenders, less than 60% spermatozoa showed normal morphology. After thermoresistance test, semen cryopreserved in TG3MF showed vigor (2.6) and motility (15%) statistically similar to TG5.3G media (15% and 2.8, respectively); however, the extender TG5.3G was more effective in preserving plasma membrane functional integrity. In conclusion, in the experimental conditions used, glycerol showed more cryoprotectant potential than methyl-formamide. Source

Dalmago G.A.,Embrapa Trigo | Bergamaschi H.,Federal University of Rio Grande do Sul | Kruger C.A.M.B.,University Regional Of Ijui | Bergonci J.I.,Federal University of Rio Grande do Sul | And 2 more authors.
Pesquisa Agropecuaria Brasileira | Year: 2010

This work aimed to quantify the evaporation of water on the soil surface under no-tillage and conventional tillage systems, and to evaluate the microlysimeters use to measure this process. Measurements were performed in the field, during the summers of 2001/2002, 2002/2003 and 2004/2005, in experiments with and without irrigation. Completely randomized designs were used, with four repetitions. The treatments consisted of no-tillage and conventional soil tillage systems, in the presence or absence of corn cultivation. Evaporation was measured daily, during drying periods between precipitations and consecutive irrigations. Without irrigation, accumulated evaporation was greater under no tillage system, in most measuring periods, irrespective of the presence of corn cultivation. In experiments with irrigation, evaporation was similar in both types of soil management systems. Normally, at the beginning of the measurement periods, within two to five days of drying, evaporation was higher in soil under conventional tillage and, subsequently, it became greater in soils under no tillage system. The use of microlysimeters proved to be efficient to measure the evaporation at the soil surface. Source

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