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- 저자 : Lisboa-Filho, P.N. (검색결과 2 건)
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Bashir, A.,Ikram, M.,Kumar, R.,Lisboa-Filho, P.N.,Thakur, P. Elsevier 2010 Materials science and engineering B. Advanced Func Vol.172 No.3
We present the structural, electronic structure and magnetic studies of Ni doped SmFeO<SUB>3</SUB>. The X-ray diffraction (XRD) studies confirm the single phase nature of the samples having orthorhombic Pbnm structure and the unit-cell volume is decreasing with the increase of Ni concentration. X-ray absorption spectroscopy (XAS) studies on O K, Fe L<SUB>3,2</SUB>, Ni L<SUB>3,2</SUB> and Sm M<SUB>5,4</SUB> edges of SmFe<SUB>1-x</SUB>Ni<SUB>x</SUB>O<SUB>3</SUB> (x@?0.5) samples along with the reference compounds revealed the homo-valence state of Fe and Ni in these materials. From magnetization studies it has been observed the materials exhibit ferromagnetic and antiferromagnetic sub-lattices, which are strongly dependent on the thermo-magnetic state of the system.
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Levels of Supplementation for Grazing Beef Heifers
Cabral, Carla Heloisa Avelino,Paulino, Mario Fonseca,Detmann, Edenio,de Campos Valadares Filho, Sebastiao,de Barros, Livia Vieira,Valente, Eriton Egidio Lisboa,de Oliveira Bauer, Maristela,Cabral, Car Asian Australasian Association of Animal Productio 2014 Animal Bioscience Vol.27 No.6
The objective of this experiment was to evaluate the effect of providing different levels of a supplement on the nutritional characteristics and productive performance of heifers on pasture during the rainy-dry transition and dry season in Brazil or tropical area. Thirty crossbred heifers with predominance of Zebu breed were used in a completely randomized experimental design. Treatments consisted of a mineral supplement and 0.5, 1.0, 1.5, or 2.0 kg/animal/d of a protein supplement containing 300 g crude protein (CP)/kg of dry matter (DM). In the rainy-dry transition season there was quadratic effect of the protein supplementation (p<0.10) on daily weight gain (DWG). A linear relationship (p<0.10) was found between increasing supplement intake and intakes of DM, organic matter (OM), crude protein (CP), ether extract (EE), non fibrous carbohydrates (NFC) and total digestible nutrients (TDN). Coefficients of apparent digestibility of CP, EE, and NFC increased linearly (p<0.10) with increasing supplement levels, but there was no effect on the DM apparent digestibility (p>0.10); the microbial efficiency (g CPmic/kg TDN) and the relationship of microbial nitrogen flow with nitrogen intake (g/g nitrogen intake) were negative linear profiles. In the dry season, the descriptive pattern least squares means showed a trend of stabilization of DWG from the supply of 0.98 kg of protein supplement; the intakes of DM, OM, CP, EE, NFC, and TDN showed increasing linear relationship (p<0.10) with protein supplement levels; the means of apparent digestibility coefficients of the different dietary fractions presented a linear-response-plateau (LRP); the microbial nitrogen flow (g/d) showed positive linear profile (p<0.10) for supplementation levels. It is concluded that supplementation improves the productive performance of grazing heifers and that 1.0 kg/d of supplement per animal gives the maximum increment of weight gain.
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