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Aiura A.L.O.,State University of Montes Claros | Aiura F.S.,State University of Montes Claros | Santos P.D.O.,Zootecnista | Santos L.V.,State University of Montes Claros | And 3 more authors.
Revista Brasileira de Saude e Producao Animal | Year: 2014

The objective was to evaluate annual variation the morphological characteristics of the hair coat of the cows crossbred Holstein x Gir, 1/2 and 3/4 of the Holstein in Salinas -Minas Gerais region. The morphological characteristics of the hair coat were: coat thickness, hair length, number of hair/cm2. Hair coat samples were held in each season (spring, summer, autumn and winter). The climatic characterization of the seasons was obtained from data provided by National Institute of Meteorology (INMET). Data for hair coat characteristics were subjected to variance analysis of according to a completely randomized factorial design (two degrees of blood and four seasons). The season effect showed that haircoat of the crossbred cows adjusted with environmental variables. And the length and number of hair/cm2 were higher in animals 3/4 Holstein. It was concluded that crossbred animals have short hair coat, very dense and well seated, especially in summer. 1/2 Holstein showed less dense hair coat and shorter than 3/4 Holstein. Source

Puiatti M.,Federal University of Vicosa | De Oliveira N.L.C.,Instituto Federal Norte Of Minas Gerais | Cecon P.R.,Federal University of Vicosa | Da Silva Bhering A.,Federal University of Vicosa
Revista Ceres | Year: 2015

The association of crops with green manure legumes is a technique to promote improvement or maintenance of soil fertility. The intercrop of taro 'Japonês' with sunnhemp were evaluated in two experiments: Experiment I, sunnhemp plants were cut at ground level; and Experiment II, sunnhemp plants were pruned at the canopy height of taro. Both esperiments evaluated the effect of six times of cutting/pruning sunnhemp (75; 105; 135; 165; 195 and 225 days after sowing - DAS), as well as a single crop of taro (without sunnhemp). Plant clippings were placed on the ground and q mass and nutrients provided by sunnhemp were determined. At taro harvest, the production of classes of rhizomes and chemical changes in the soil were evaluated. The cuttings after 105 DAS provided less mass production of mother and daughter rhizomes and number/plant of large and commercial cormels compared with the control. Pruning at canopy height at 135 and 165 DAS provided the largest amounts of fresh and dry mass provenienof sunnhemp, organic carbon and nutrients. At 165 DAS, the contribution of N to the soil by sunnhemp cutting reached 308 kg ha-1and by sunnhemp pruning was 202 kg ha-1. The intercrop of sunnhemp with taro is viable, with management of the intercropping indicated up to 105 DAS of sunnhemp. Source

Almeida I.C.C.,Instituto Federal Norte Of Minas Gerais | Almeida I.C.C.,Federal University of Vicosa | Schaefer C.E.G.R.,Federal University of Vicosa | Fernandes R.B.A.,Federal University of Vicosa | And 4 more authors.
Geomorphology | Year: 2014

Climate change impacts the biotic and abiotic components of polar ecosystems, affecting the stability of permafrost, active layer thickness, vegetation, and soil. This paper describes the active layer thermal regimes of two adjacent shallow boreholes, under the same soil but with two different vegetations. The study is location in Lions Rump, at King George Island, Maritime Antarctic, one of the most sensitive regions to climate change, located near the climatic limit of Antarctic permafrost. Both sites are a Turbic Cambic Cryosol formed on andesitic basalt, one under moss vegetation (Andreaea gainii, at 85 m a.s.l.) and another under lichen (Usnea sp., at 86 m a.s.l.), located 10 m apart. Ground temperature at same depths (10, 30 and 80 cm), water content at 80 cm depth and air temperature were recorded hourly between March 2009 and February 2011. The two sites showed significant differences in mean annual ground temperature for all depths. The lichen site showed a higher soil temperature amplitude compared to the moss site, with ground surface (10 cm) showing the highest daily temperature in January 2011 (7.3 °C) and the lowest daily temperature in August (- 16.5 °C). The soil temperature at the lichen site closely followed the air temperature trend. The moss site showed a higher water content at the bottommost layer, consistent with the water-saturated, low landscape position. The observed thermal buffering effect under mosses is primarily associated with higher moisture onsite, but a longer duration of the snowpack (not monitored) may also have influenced the results. Active layer thickness was approximately 150 cm at low-lying moss site, and 120 cm at well-drained lichen site. This allows to classify these soils as Cryosols (WRB) or Gelisols (Soil Taxonomy), with evident turbic features. © 2014 Elsevier B.V. All rights reserved. Source

Lopes J.C.S.,Instituto Federal Norte Of Minas Gerais | Lopes J.C.S.,Federal University of Uberlandia | Damasceno J.L.,University of Franca | Oliveira P.F.,University of Franca | And 8 more authors.
Journal of the Brazilian Chemical Society | Year: 2015

The synthesis, characterization and cytotoxic activity of cis-[Ru(dicl)(dppm)2]PF6 and cis.[Ru(ibu)(dppm)2]PF6, (dppm = 1,1-bis(diphenylphosphine)methane; dicl = diclofenac anion and ibu = ibuprofen anion), are described in this work. Complexes were characterized by elemental analysis, Fourier transform infrared spectroscopy (FTIR), UV-Vis, 31P{1H} nuclear magnetic resonance (NMR) and high-resolution mass spectrometry (HRESIMS). X-ray structure of cis-[Ru(ibu)(dppm)2]PF6 is also described. Preliminary calf thymus DNA (ct-DNA) binding studies were carried out by UV-Vis and viscosity experiments, with results suggesting the existence of electrostatic interactions between ruthenium complexes and ct-DNA. Cytotoxicity assays were carried out on a panel of human cancer cell lines and a human normal cell line. Complexes displayed a high to moderate cytotoxicity with IC50 ranging from 5 to 47 μmol L-1. cis-[Ru(ibu) (dppm)2]PF6 was found to be the most active, with IC50 values lower than cisplatin. The degree of cytotoxicity was maintained for the normal cell line, although cis-[Ru(ibu)(dppm)2]PF6 exhibited a similar selectivity to that of cisplatin but with a higher activity for at least two tumor cell lines which evidences a promising anticancer candidate and selects this complex for further experiments. © 2015 Sociedade Brasileira de Química. Source

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