With the pulsed laser deposition （PLD） method, amorphous 80GeS2-15Ga2S3-5CdS chalcogenide film was deposited on glassy substrate. Obvious second harmonic generation （SHG） was observed in the ultraviolet （UV）-pol...With the pulsed laser deposition （PLD） method, amorphous 80GeS2-15Ga2S3-5CdS chalcogenide film was deposited on glassy substrate. Obvious second harmonic generation （SHG） was observed in the ultraviolet （UV）-polarized film and the SHG intensity increased with the increase in single pulse energy and irradiation time. Through Raman spectra and transmission spectra, the mechanism of SHG was studied. The experimental results demonstrated that effective electron traps and hole traps were generated in the UV- polarized film. The energy of electrons and holes was using up due to the collision with other particles and crystal fields during their movement and finally they were captured by the traps and fixed, which made the electric charge distribution nonuniform in the film and destroyed the spatial isotropy. In the meantime, the center of positive and negative charges separated and a built-in electric field was formed which generated the optical second-order nonlinearity of the film.展开更多
Roman scattering measurement of （ 1 - x ） GeS2-x Ga2S3 system glasses was conducted in order to understand the microstructural change caused by the addition of Ga2S3 . According to the change of Raman spectra with t...Roman scattering measurement of （ 1 - x ） GeS2-x Ga2S3 system glasses was conducted in order to understand the microstructural change caused by the addition of Ga2S3 . According to the change of Raman spectra with the addition of Ga2S3, two main structural transformations were deduced ： the gradual enhancement of ethane- like structural units S3 Ge- GeS3 （ 250 cm ^- 1） and S3 Ga- GaS3 （270 cm ^- 1 ） and the appearance of charge imbalanced units [ Ga2 S2 （ S1/2 ）4 ]^2- and [Ga（ S1/2 ）4 ]^- . And this change of structural aspect seems to give as a clue to understanding the cause of the increased rare-earth solubility.展开更多
GeS4 bulk glasses were prepared by the melt-quench technique and the samples were irradiated by 532-nm linearly polarized light. After the laser treatment, the photo-induced changes of the samples were investigated by...GeS4 bulk glasses were prepared by the melt-quench technique and the samples were irradiated by 532-nm linearly polarized light. After the laser treatment, the photo-induced changes of the samples were investigated by UV-1601 speetrophotometer and optical second-order nonlinear tester. The results show that the transmittance of the samples around 532 nm obviously decreases and Bragg reflector forms, which is due to the production of photon-generated carriers. With the increase of laser pulse energy or the extension of irradiation duration, the Bragg reflector increases and gradually tends to be stable. These can be ascribed to the excitation- capture process of the carriers. After irradiation, the relaxation phenomenon results from the release of part of the absorbed energy in the glass matrix. And the fitting equation of the relaxation process is consistent with a conventional Kohlrausch stretched exponential function. The origin of the second harmonic generation （SHG） is because of the dipole reorientation caused by the photo-induced anisotropy in the glass.展开更多
IR Li2Ga2GeS6 nonlinear crystals were directly obtained with the composition of 40GeS2- 30Ga2Ss-30LieS, by the conventional melt-quenching method. The high depth digital image indicated that the obtained LizGa2GeS6 cr...IR Li2Ga2GeS6 nonlinear crystals were directly obtained with the composition of 40GeS2- 30Ga2Ss-30LieS, by the conventional melt-quenching method. The high depth digital image indicated that the obtained LizGa2GeS6 crystals showed a big size of 0.3 × 0.25 × 0.3 mm3. It was shown that the compound was very suscepfive to H20 with second harmonic observation. Besides, the glass-forming region of GeS2-Ga2S3- Li2S system was further studied by the conventional melt-quenching method.GeS2-Ga2S3-Li2S glass-ceramics containing IR Li2Ga2GeS6 nonlinear nanocrystals were obtained at a more carefully controlled heating rate.展开更多
Backgroud:To explore the analgesic,anti-inflammatory,and anti-infective effects of Chai Ge fever relief oral liquid and provide evidence for clinical application of Chai Ge fever relief oral liquid.Methods:In this stu...Backgroud:To explore the analgesic,anti-inflammatory,and anti-infective effects of Chai Ge fever relief oral liquid and provide evidence for clinical application of Chai Ge fever relief oral liquid.Methods:In this study,four groups of experiments were designed:analgesic,anti-inflammatory,antiviral,and antibacterial.In the mouse pain model,the analgesic effect of Chai Ge fever relief oral liquid was studied by the writhing method and pain threshold;the anti-inflammatory effect by measuring the level of capillary permeability in the abdominal cavity of mice in different dose groups and the weight of cotton ball granuloma formation in rats;the antiviral effect by measuring the lung index of a pneumonia model of mouse infected with influenza virus;and the antibacterial effect by comparing the difference in the death protection ratio between each dose group and the model group result.Results:In the analgesic experiment,the high and medium dose of Chai Ge fever relief oral liquid could significantly reduce the number of writhing in mice caused by acetic acid,and the pain threshold of mice in the high-and medium-dose groups was significantly increased for 1–3 hours.In the anti-inflammatory experiment,the medium-dose group could significantly inhibit the increase of capillary permeability in the abdominal cavity of mice caused by acetic acid,and the low-dose group could significantly reduce the weight of rat cotton ball granuloma.In the antiviral experiment,the high-and medium-doses of Chai Ge fever relief oral liquid could significantly reduce the lung index of normal mouse pneumonia model of influenza virus infection and achieve a higher inhibition rate.In the anti-infective experiment,the death protection rate of the high-dose group was significantly different from that of the model control group.All three dose groups could significantly prolong the survival days of infected mice.Conclusion:These experimental results prove that in addition to its antipyretic effect,Chai Ge fever relief oral liquid also has analgesic,anti-inflammatory,antiviral,and antibacterial effects.展开更多
基金Funded by the National Natural Science Foundaition of China(Nos.51172169 and 61177084),NCET\(NCET-11-0687)the Fundamental Research Funds for the Central Universities(Wuhan University of Technology)
文摘With the pulsed laser deposition （PLD） method, amorphous 80GeS2-15Ga2S3-5CdS chalcogenide film was deposited on glassy substrate. Obvious second harmonic generation （SHG） was observed in the ultraviolet （UV）-polarized film and the SHG intensity increased with the increase in single pulse energy and irradiation time. Through Raman spectra and transmission spectra, the mechanism of SHG was studied. The experimental results demonstrated that effective electron traps and hole traps were generated in the UV- polarized film. The energy of electrons and holes was using up due to the collision with other particles and crystal fields during their movement and finally they were captured by the traps and fixed, which made the electric charge distribution nonuniform in the film and destroyed the spatial isotropy. In the meantime, the center of positive and negative charges separated and a built-in electric field was formed which generated the optical second-order nonlinearity of the film.
文摘Roman scattering measurement of （ 1 - x ） GeS2-x Ga2S3 system glasses was conducted in order to understand the microstructural change caused by the addition of Ga2S3 . According to the change of Raman spectra with the addition of Ga2S3, two main structural transformations were deduced ： the gradual enhancement of ethane- like structural units S3 Ge- GeS3 （ 250 cm ^- 1） and S3 Ga- GaS3 （270 cm ^- 1 ） and the appearance of charge imbalanced units [ Ga2 S2 （ S1/2 ）4 ]^2- and [Ga（ S1/2 ）4 ]^- . And this change of structural aspect seems to give as a clue to understanding the cause of the increased rare-earth solubility.
基金Supported by the Natural Science Foundation of Hubei Province(No.2013CFA008)NCET(No.11-0687)
文摘GeS4 bulk glasses were prepared by the melt-quench technique and the samples were irradiated by 532-nm linearly polarized light. After the laser treatment, the photo-induced changes of the samples were investigated by UV-1601 speetrophotometer and optical second-order nonlinear tester. The results show that the transmittance of the samples around 532 nm obviously decreases and Bragg reflector forms, which is due to the production of photon-generated carriers. With the increase of laser pulse energy or the extension of irradiation duration, the Bragg reflector increases and gradually tends to be stable. These can be ascribed to the excitation- capture process of the carriers. After irradiation, the relaxation phenomenon results from the release of part of the absorbed energy in the glass matrix. And the fitting equation of the relaxation process is consistent with a conventional Kohlrausch stretched exponential function. The origin of the second harmonic generation （SHG） is because of the dipole reorientation caused by the photo-induced anisotropy in the glass.
基金Funded by the National Natural Science Foundation of China(No.51272183)the Nanotechnology Program of Suzhou(No.ZXG201438)
文摘IR Li2Ga2GeS6 nonlinear crystals were directly obtained with the composition of 40GeS2- 30Ga2Ss-30LieS, by the conventional melt-quenching method. The high depth digital image indicated that the obtained LizGa2GeS6 crystals showed a big size of 0.3 × 0.25 × 0.3 mm3. It was shown that the compound was very suscepfive to H20 with second harmonic observation. Besides, the glass-forming region of GeS2-Ga2S3- Li2S system was further studied by the conventional melt-quenching method.GeS2-Ga2S3-Li2S glass-ceramics containing IR Li2Ga2GeS6 nonlinear nanocrystals were obtained at a more carefully controlled heating rate.
基金This study was supported by National Natural Science Foundation of China(81773977).
文摘Backgroud:To explore the analgesic,anti-inflammatory,and anti-infective effects of Chai Ge fever relief oral liquid and provide evidence for clinical application of Chai Ge fever relief oral liquid.Methods:In this study,four groups of experiments were designed:analgesic,anti-inflammatory,antiviral,and antibacterial.In the mouse pain model,the analgesic effect of Chai Ge fever relief oral liquid was studied by the writhing method and pain threshold;the anti-inflammatory effect by measuring the level of capillary permeability in the abdominal cavity of mice in different dose groups and the weight of cotton ball granuloma formation in rats;the antiviral effect by measuring the lung index of a pneumonia model of mouse infected with influenza virus;and the antibacterial effect by comparing the difference in the death protection ratio between each dose group and the model group result.Results:In the analgesic experiment,the high and medium dose of Chai Ge fever relief oral liquid could significantly reduce the number of writhing in mice caused by acetic acid,and the pain threshold of mice in the high-and medium-dose groups was significantly increased for 1–3 hours.In the anti-inflammatory experiment,the medium-dose group could significantly inhibit the increase of capillary permeability in the abdominal cavity of mice caused by acetic acid,and the low-dose group could significantly reduce the weight of rat cotton ball granuloma.In the antiviral experiment,the high-and medium-doses of Chai Ge fever relief oral liquid could significantly reduce the lung index of normal mouse pneumonia model of influenza virus infection and achieve a higher inhibition rate.In the anti-infective experiment,the death protection rate of the high-dose group was significantly different from that of the model control group.All three dose groups could significantly prolong the survival days of infected mice.Conclusion:These experimental results prove that in addition to its antipyretic effect,Chai Ge fever relief oral liquid also has analgesic,anti-inflammatory,antiviral,and antibacterial effects.
