This paper studies photo-,cathodo-and X-ray luminescence of Ce^(3+) and Dy^(3+)mono-doped LABO_3 samples or Ce^(3+),Dy^(3+) codoped LaBO_3 samples and the dependence of Ce^(3+) and Dy^(3+) luminescent intensi- ties on...This paper studies photo-,cathodo-and X-ray luminescence of Ce^(3+) and Dy^(3+)mono-doped LABO_3 samples or Ce^(3+),Dy^(3+) codoped LaBO_3 samples and the dependence of Ce^(3+) and Dy^(3+) luminescent intensi- ties on compositions.The results obtained indicate that Ce^(3+) can sensitize well the luminescence of Dy^(3+) un- der UV excitation and quench markedly it under CR and XR excitation.This paper also studies the concen- tration dependence of emission intensity of Dy^(3+) under the excitation of peak wavelength of 352 nm,con- firming that the mechanism of concentration self-quenching of Dy^(3+) is a dipole-dipole interaction and the mechanism of the energy transfer from Ce^(3+) to Dy^(3+) is a resonant transfer in which electric multipole interaction plays a leading role.展开更多
Objective: to explore the clinical effect of hand rotation of fetal head in treatment of occipitotransverse position and occipitoposterior position in difficult labour. Methods: from March 2018 to June 2020, 100 cases...Objective: to explore the clinical effect of hand rotation of fetal head in treatment of occipitotransverse position and occipitoposterior position in difficult labour. Methods: from March 2018 to June 2020, 100 cases of puerperae with occipitotransverse position and occipitoposterior position in difficult labour in our hospital were selected. The group was divided into two groups by random number table method. The control group was treated with conventional treatment (50 cases) and the observation group was treated with hand rotation of fetal head (50 cases). The clinical effects of the two groups were compared. Results: the vaginal delivery rate in the observation group was higher than that in the control group, the postpartum hemorrhage rate and labor injury rate were lower than those in the control group, and the second stage of labor was shorter than that in the control group (P<0.05). Conclusion: for occipitotransverse position and occipitoposterior position in difficult labour, hand rotation of fetal head is beneficial to the recovery of fetal head position, shorten delivery course, promote vaginal delivery, and reduce the adverse effects on mothers and babies. It can be popularized in clinic.展开更多
文摘This paper studies photo-,cathodo-and X-ray luminescence of Ce^(3+) and Dy^(3+)mono-doped LABO_3 samples or Ce^(3+),Dy^(3+) codoped LaBO_3 samples and the dependence of Ce^(3+) and Dy^(3+) luminescent intensi- ties on compositions.The results obtained indicate that Ce^(3+) can sensitize well the luminescence of Dy^(3+) un- der UV excitation and quench markedly it under CR and XR excitation.This paper also studies the concen- tration dependence of emission intensity of Dy^(3+) under the excitation of peak wavelength of 352 nm,con- firming that the mechanism of concentration self-quenching of Dy^(3+) is a dipole-dipole interaction and the mechanism of the energy transfer from Ce^(3+) to Dy^(3+) is a resonant transfer in which electric multipole interaction plays a leading role.
文摘Objective: to explore the clinical effect of hand rotation of fetal head in treatment of occipitotransverse position and occipitoposterior position in difficult labour. Methods: from March 2018 to June 2020, 100 cases of puerperae with occipitotransverse position and occipitoposterior position in difficult labour in our hospital were selected. The group was divided into two groups by random number table method. The control group was treated with conventional treatment (50 cases) and the observation group was treated with hand rotation of fetal head (50 cases). The clinical effects of the two groups were compared. Results: the vaginal delivery rate in the observation group was higher than that in the control group, the postpartum hemorrhage rate and labor injury rate were lower than those in the control group, and the second stage of labor was shorter than that in the control group (P<0.05). Conclusion: for occipitotransverse position and occipitoposterior position in difficult labour, hand rotation of fetal head is beneficial to the recovery of fetal head position, shorten delivery course, promote vaginal delivery, and reduce the adverse effects on mothers and babies. It can be popularized in clinic.
