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A series of molybdate red emitting phosphors have been successfully synthesised at 800°C by coprecipitation method. The excitation spectra of the phosphors reveal three strong excitation bands at 395, 466 and 535 nm respectively, which match well with the near UV and blue light emitting diode chips. The intensity of the emission from 5D0→7F2 of , phosphors with the optimal compositions of x = 0·04 is 1·3 times higher than that of . The photoluminescence of , (M = Li, Na, K) phosphors show the stronger emission band at 616 nm than that of , but the intensity decline with the M+ ion radius increased. In addition, the thermal quenching characteristics of CaMoO4:Eu3+, Eu3+/Sm3+, Eu3+/Sm3+/Li+ are also investigated under the temperature from 40 to 200°C, and the relative luminous intensity attenuation rate is the and the thermal stability is better by doping Eu3+/Sm3+/Li+, indicating that CaMoO4:Eu3+/Sm3+/Li+ are more promising red emitting phosphors. [ABSTRACT FROM AUTHOR]

Objective: To compare the acoustic signal, mucosal wave and aerodynamic parameter (phonation threshold pressure, PTP) under different sub-glottal pressure (SGP) on the excised canine models with different extent of glottal incompetence. Methods: Perturbation measures and nonlinear dynamic measures were applied to analyze the acoustic signal (jitter, shimmer), mucosal wave [frequency(F), amplitude(A), phase(P)] and PTP from our study including 11 excised canine larynges with different extent of glottal incompetence (0 mm, 1 mm, 2 mm, 3 mm, n =11, respectively) under 1-4 kPa sub-glottal pressure. Results: There were significant differences between different groups in jitter, shimmer, amplitude, frequency and PTP under various SGPs and extent of glottal incompetence (all P <0.05), inversely, there was no significant difference in P between groups ( P >0.05). Jitter and shimmer changed obviously when the SGP increased to 3 kPa in the control group and GI 1 mm group. Jitter and shimmer changed obviously when the SGP increased to 2 kPa in the GI 2 mm and 3 mm groups. The F and A of mucosal wave increased with increasing SGP, decreased with increasing GI, and the P changed irregularly. There was statistically significant difference of PTP between different GI groups. Conclusions: The SGP and the extent of GI had obvious affection on the the acoustic signal, mucosal wave and aerodynamic parameters.

Introduction: Recently it has been reported that Astragalus membranaceus injection (AMI) inhibits immune responses, but whether it affects alloimmunity is not clear. It has been shown that the CD4(+) CD25(+) regulatory T cells (Treg) down-regulate immune responses. The aim of our study was to investigate the effects of AMI on allograft survival and its relation to Treg., Materials and Methods: Allografted mice were administered AMI for 14 consecutive days with observations of graft survival. The specific recall response, the ratio of Treg, the expression of Foxp3 mRNA, and interleukin (IL)-10 secretion were measured by mixed lymphocyte reactions (MLR), FCM, reverse transcriptase-polymerase chain reaction, and radioimmunoassay, respectively., Results: AMI significantly prolonged allograft survival by up-regulating the Treg ratio and promoting Foxp3 expression (P < .05). The ratio of Tregs, the expression of Foxp3 mRNA, and the IL-10 level in the AMI administration group increased from day 7, to reach a maximum at day 14, recovering to the initial level on day 21. No obvious difference was detected between the AMI and a cyclosporine group., Conclusion: AMI administered in vivo prolonged allograft survival associated with promotion of Treg activities., (Copyright © 2010 Elsevier Inc. All rights reserved.)