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In order to obtain red phosphor with high color purity, β-Li 2 TiO 3 : Eu3+ dominated by electric dipole transition was prepared by the hydrothermal method. Eu3+ doping concentration (< 0.5 mol%) and calcination time (> 12 h) can regulate the phase purity, supercell development, asymmetric lattice point configuration and the luminescence performance. Under excitation at 394 nm, β-Li 2 TiO 3 : Eu3+ emits narrow band 618 nm red light due to that Eu3+ replaces Li+ at the relatively active Li1 position, and the 5D 0 → 7F 2 electric dipole transition dominates. Calcined at 600 °C for 36 h with Eu3+ doped concentration of 0.5 mol%, the luminescence performance of β-Li 2 TiO 3 : Eu3+ is superior, of which the lifetime is 0.64 ms, the color coordinates x = 0.63, y = 0.37, the color temperature of 987 K, the color rendering index of 82, and the red color purity of 99.7%. The electric dipole transition line intensity parameters Ω 2 and Ω 4 are 8.01 × 10−20 cm2 and 0.62 × 10−20 cm2, respectively, yielding Ω 2 /Ω 4 of 12.9. The fluorescence branch ratio of 5D 0 → 7F 2 is 82.9%, and the quantum efficiency can reach 92%, which is superior within similar materials. [Display omitted] • Peculiar red-light emitting β-Li 2 TiO 3 : Eu3+ with color purity of 99.7%. • Electric dipole transition can be regulated. • Electric dipole transition of Eu3+ is dominated in β-Li 2 TiO 3. [ABSTRACT FROM AUTHOR]

Abstract: To determine the immune function of Taishan Robinia pseudoacacia Polysaccharide (TRPPS) on chickens, 240 chickens were selected as experimental animals and treated with various doses of TRPPS by hypodermic injection before immunized NDV inactivated vaccine. The results indicated that any dose of TRPPS could significantly promote the development of the immune organs, increase the quantity of leukocyte and the ratio of lymphocyte, and improve the antibody titers against Newcastle disease. Meanwhile, it also increased the magnitude of SIgA in duodenum. However, the dose of 200mg/ml showed to be the most effective. Therefore, in terms of improving immunologic function and production performance, TRPPS could be used as a vaccine immunopotentiator for immune responses. [Copyright &y& Elsevier]