Separation of Cultivars of Soybeans by Chemometric Methods Using Near Infrared Spectroscopy.

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Growth, physiological and immune responses of Arapaima gigas (Arapaimidae) to Aeromonas hydrophila challenge and handling stress following feeding with immunostimulant supplemented diets.

The current study tested the efficacy of a dietary immunostimulant additive (Aquate Fish?®) on the growth performance, and on the physiological and immune responses of Arapaima gigas. Two trials were carried out: a feeding trial for 30 days with the experimental diets and a challenge trial for 7 days, in which fish were bacterial challenge (Aeromonas hydrophila) following by 60 s handling stress. During the feeding trial, fingerlings were fed diets supplemented with 0 (control), 6, 9 and 12 g Aquate Fish?®/kg diet. Dietary supplementation did not influence feed intake, feed conversion and condition factor, but increased the final biomass, number of erythrocytes, thrombocytes, leukocytes, lymphocytes, monocytes, hemoglobin, glucose, globulins and plasma triglycerides in fish fed at a concentration of 12 g/kg diet. After bacterial infection, mortality occurred only in fish fed control treatment, whereas respiratory burst of leukocytes, number of leukocytes and lymphocytes increased in fish that received 12 g of dietary supplementation. The results indicated that dietary supplementation with 12 g of Aquate Fish?® improved biomass and immunity performance of A. gigas fingerlings, without negatively affecting blood biochemical parameters

Adaptabilidade e estabilidade de cultivares de feijoeiro comum na zona agreste do Nordeste brasileiro.

bitstream/CPATC/19573/1/bp-26.pdfISSN 1678-1961

Adaptabilidade e estabilidade de cultivares de feijoeiro comum na zona agreste do Nordeste brasileiro.

Nos anos agrícolas de 2005 e 2006, 12 variedades de feijoeiro comum (Phaseolus vulgaris L.) foram avaliadas em 18 ambientes da Zona Agreste do Nordeste brasileiro, em blocos aos acaso com três repetições, visando conhecer a adaptabilidade e a estabilidade de produção desses materiais. As áreas do agreste localizadas nos municípios de Paripiranga/BA, Simão Dias/SE e Frei Paulo/SE, mostraram-se mais propícias ao cultivo do feijoeiro comum. Os genótipos diferiram quanto à adaptabilidade e a estabilidade, destacando-se o BRS Marfim para ambientes favoráveis. As variedades BRS Valente, Supremo, Princesa e BRS Pontal evidenciaram adaptabilidade ampla (b0 > média geral e b = 1), consubstanciando-se em alternativas importantes para a exploração comercial nas diferentes áreas de cultivo do feijoeiro no Agreste nordestino. Dentre essas se destacou a Princesa, por se constituir no material ideal preconizado pelo modelo proposto (b0 > média geral; b = 1 e s2 d = 0).bitstream/CNPAF/26407/1/bp-26.pd

A spin chain model with non-Hermitian interaction: the Ising quantum spin chain in an imaginary field

We investigate a lattice version of the Yang-Lee model which is characterized by a non-Hermitian quantum spin chain Hamiltonian. We propose a new way to implement PT-symmetry on the lattice, which serves to guarantee the reality of the spectrum in certain regions of values of the coupling constants. In that region of unbroken PT-symmetry we construct a Dyson map, a metric operator and find the Hermitian counterpart of the Hamiltonian for small values of the number of sites, both exactly and perturbatively. Besides the standard perturbation theory about the Hermitian part of the Hamiltonian, we also carry out an expansion in the second coupling constant of the model. Our constructions turns out to be unique with the sole assumption that the Dyson map is Hermitian. Finally we compute the magnetization of the chain in the z and x direction