FTIR absorption spectra indicate that H^+can easily enter the crystal structure and form OH^-centers in Er:Yb:YCOB and O-H bonds prefer to lie in the a-c plane.Within our current studied concentration level,crystal sa...FTIR absorption spectra indicate that H^+can easily enter the crystal structure and form OH^-centers in Er:Yb:YCOB and O-H bonds prefer to lie in the a-c plane.Within our current studied concentration level,crystal samples with higher OH-abso rption coefficie nts demonstrate stro nger fluo rescence intensity and longer fluorescence lifetime at 1535 nm.As the stretching vibration energy of OH-group approximately corresponds to the energy gap between the 4 I11/2 and 4 I13/2 levels of Er^3+,and thus,OH^-ions can shorten the fluorescence lifetime of Er^3+-4I11/2 level by the phonon-assisted cross-relaxation process between the Er^3+and OH-ions.Our curre nt results confirm that a certain conte nt of OH ions can enhance the ene rgy transfer process from Yb^3+to Er^3+and subsequently promote fluorescence output in 1.5-1.6μm.展开更多
Background:To assess the safety and efficacy of supracapsular implantation with optic capture of the posterior chamber intraocular lens in Chinese children with aphakic after traumatic cataract.Methods:It was a retros...Background:To assess the safety and efficacy of supracapsular implantation with optic capture of the posterior chamber intraocular lens in Chinese children with aphakic after traumatic cataract.Methods:It was a retrospective case series study.Fifteen cases(15 eyes)Chinese children received supracapsular implantation with optic capture of the posterior chamber intraocular lens.Pre-and post-operative visual acuities were recorded.Intra-and post-operative complications were observed.The follow-up period ranged from 7 to 43(28.7±7.2)months.Results:Implantation of optic capture of the posterior chamber intraocular lens was successfully performed in 15 eyes.The best corrected visual acuity(BCVA)ranged from 0.3 to 1.0(0.61±0.19).No optic axis opaque was found in 15 eyes with optic capture.The major complications of optic capture were iris posterior synechia and intraocular lens(IOL)precipitates.Intraocular dislocation was found in one case three weeks after the operation.Conclusions:Supracapsular implantation with optic capture of the posterior chamber intraocular lens is safe and effective for the treatment of traumatic cataract in Chinese children.展开更多
A new organic crystal of 4-N, N-dimethylamino-4＇-N＇-methyl-stilbazolium benzene sulfonate （DASBS） was synthesized and characterized for the first time. It is a derivative of 4-N, N-dimethylamino-4＇-N＇-methyl-sti...A new organic crystal of 4-N, N-dimethylamino-4＇-N＇-methyl-stilbazolium benzene sulfonate （DASBS） was synthesized and characterized for the first time. It is a derivative of 4-N, N-dimethylamino-4＇-N＇-methyl-stilbazolium tosylate （DAST） with the benzene sulfonate replacing p-toluenesulfonate. Single crystal XRD demonstrated that the crystal structure of DASBS. H20 was triclinic. The thermal analysis of this new crystal was also conducted, and the melting point was obtained to be 232℃.展开更多
基金Project supported by the National Natural Science Foundation of China(11204148,11374170)Major Basic Research Projects of Shandong Natural Science Foundation(ZR2018ZB0650)+4 种基金China Postdoctoral Science Foundation(2015M580573)the Applied Basic Research Programs for Youths of Qingdao(15-9-1-52-JCH)Taishan Scholar Program of Shandong Provincethe Qingdao Postdoctoral Application Research Project(2015127)the Open Projects of State Key Laboratory of Rare-earth Resource Utilization(RERU2016015)
文摘FTIR absorption spectra indicate that H^+can easily enter the crystal structure and form OH^-centers in Er:Yb:YCOB and O-H bonds prefer to lie in the a-c plane.Within our current studied concentration level,crystal samples with higher OH-abso rption coefficie nts demonstrate stro nger fluo rescence intensity and longer fluorescence lifetime at 1535 nm.As the stretching vibration energy of OH-group approximately corresponds to the energy gap between the 4 I11/2 and 4 I13/2 levels of Er^3+,and thus,OH^-ions can shorten the fluorescence lifetime of Er^3+-4I11/2 level by the phonon-assisted cross-relaxation process between the Er^3+and OH-ions.Our curre nt results confirm that a certain conte nt of OH ions can enhance the ene rgy transfer process from Yb^3+to Er^3+and subsequently promote fluorescence output in 1.5-1.6μm.
文摘Background:To assess the safety and efficacy of supracapsular implantation with optic capture of the posterior chamber intraocular lens in Chinese children with aphakic after traumatic cataract.Methods:It was a retrospective case series study.Fifteen cases(15 eyes)Chinese children received supracapsular implantation with optic capture of the posterior chamber intraocular lens.Pre-and post-operative visual acuities were recorded.Intra-and post-operative complications were observed.The follow-up period ranged from 7 to 43(28.7±7.2)months.Results:Implantation of optic capture of the posterior chamber intraocular lens was successfully performed in 15 eyes.The best corrected visual acuity(BCVA)ranged from 0.3 to 1.0(0.61±0.19).No optic axis opaque was found in 15 eyes with optic capture.The major complications of optic capture were iris posterior synechia and intraocular lens(IOL)precipitates.Intraocular dislocation was found in one case three weeks after the operation.Conclusions:Supracapsular implantation with optic capture of the posterior chamber intraocular lens is safe and effective for the treatment of traumatic cataract in Chinese children.
文摘A new organic crystal of 4-N, N-dimethylamino-4＇-N＇-methyl-stilbazolium benzene sulfonate （DASBS） was synthesized and characterized for the first time. It is a derivative of 4-N, N-dimethylamino-4＇-N＇-methyl-stilbazolium tosylate （DAST） with the benzene sulfonate replacing p-toluenesulfonate. Single crystal XRD demonstrated that the crystal structure of DASBS. H20 was triclinic. The thermal analysis of this new crystal was also conducted, and the melting point was obtained to be 232℃.
