The products of monoammonium phosphate containing Cr^3+resulted in disqualification,and further posed a serious threat to ecological environment and human beings.Herein,the porous adsorbent of fluor(calcium silicate)c...The products of monoammonium phosphate containing Cr^3+resulted in disqualification,and further posed a serious threat to ecological environment and human beings.Herein,the porous adsorbent of fluor(calcium silicate)composites(FCSc)was prepared by hydrothermal method using diatomaceous earth,hydrated lime and additive(NaF)as raw materials,which was characterized and used for the removal of Cr^3+from monoammonium phosphate solutions.The effects of different parameters,such as solution pH,initial Cr^3+concentration,temperature and contact time on the adsorption of Cr^3+onto FCSc were investigated in details.The results indicated that the adsorption process was in agreement with the pseudo-second-order kinetic model and Freundlich isotherm.The spontaneous and endothermic nature of the adsorption process was obtained by analyzing various thermodynamic parameters(△G0,△H0,and△S0).In addition,computational monte carlo simulations between Cr3+ions and FCSc were conducted to elucidate the adsorption mechanism.Such kind of porous adsorbent provided a potential application in the removal of impurities from monoammonium phosphate industry.展开更多
The simple approach to acquire the fltaxescenee spectra of vitamin bl, b2 and t6 is proposed by direct ilhanination on solid powder sample. The experimentally acquired fluorescence spectra are in accordance with the p...The simple approach to acquire the fltaxescenee spectra of vitamin bl, b2 and t6 is proposed by direct ilhanination on solid powder sample. The experimentally acquired fluorescence spectra are in accordance with the previous measurements on soluble samples. The fluorescence spectra for a mixture of vitamins bl, b2 and b6 with different concentrations have been investigated, and the fluorescence mechanism is explained on the basis of moleoalar struchture Possible reasons of the blue-shift of the fluorescence peak and enhancement of the peak power are explained as well. The advantages of solid powder method is analyzed and discussed.展开更多
Purpose:to observe the occurrence rate of secondary caries on sjogren syndrome patients by filling carious cavities with simply using resin materials and fluor protector added resin materials.Method:20 cases of sjogre...Purpose:to observe the occurrence rate of secondary caries on sjogren syndrome patients by filling carious cavities with simply using resin materials and fluor protector added resin materials.Method:20 cases of sjogren syndrome patients,who were filled the decayed teeth in the Stomatology Department of our hospital from September 2015 to September 2016,and 155 carious cavities were selected to be involved in the experiment,and secondary caries would be determined in 3 months,6 months and 12 months after filling of carious cavities.Result:the occurrence rates of secondary caries in the experimental group after treatment in 3 months,6 months,12 months were 1.37%,2.74%,5.48%respectively;while the rates in the control group were 4.87%,7.32%,13.41%respectively.There was statistical significance between differences of the occurrence rates of secondary caries in two groups.Conclusion:the occurrence of intraoral secondary caries of sjogren syndrome patients can be effectively reduced by using fluor protector after filling decayed teeth.展开更多
Introduction: [<sup>18</sup>F]-fluoro-methylcholine (FCH) PET/CT and MRI with diffusion-weighted MRI (DW-MRI) have insufficient performance in lymph node staging of primary prostate cancer by themselves, b...Introduction: [<sup>18</sup>F]-fluoro-methylcholine (FCH) PET/CT and MRI with diffusion-weighted MRI (DW-MRI) have insufficient performance in lymph node staging of primary prostate cancer by themselves, but the combination may perform better. We aim to prospectively determine the diagnostic performance of combined FCH PET and MRI for lymph node staging. Methods: This was a single site study of diagnostic accuracy in a well-defined group of 21 consecutive high-risk primary prostate cancer patients (>30% chance of lymph node metastases) in a large community hospital. We performed FCH PET/CT and MRI with DW-MRI prior to endoscopic extended pelvic lymph node dissection (EPLND). PET was fused and interpreted together with various MRI image sets (T1, T2, DWIBS) and was only scored positive when a lymph node seen on MRI coincided with increased focal FCH uptake on PET. Findings were compared with detailed histological evaluation, on a per-patient and per-region level. We calculated sensitivity, specificity, positive and negative predictive value of combined PET-MRI. Results: 14 out of 21 patients had metastatic lymph nodes with 37 out of 164 evaluable regions harboring metastases. On a per-patient analysis, PET-MRI had a sensitivity/specificity of 79/100% with a PPV/NPV of 100/77%. On a per-region analysis (n = 164) these figure were 65/99% and 96/91%, respectively. Conclusions: Combined DW-MRI and FCH PET/CT has a very high positive predictive value in high risk prostate cancer patients. If confirmed in larger series a positive combined scan may safely allow cancellation of surgical staging in selected patients, depending on local protocols in N1 M0 patients.展开更多
Since F?rster discovered the fluorescence spectrum of excimer in 1954, a lot of work has been done in this field. It is generally considered that there is no preformed excimer site in the ground state because the abso...Since F?rster discovered the fluorescence spectrum of excimer in 1954, a lot of work has been done in this field. It is generally considered that there is no preformed excimer site in the ground state because the absorption spectrum is unchanged. Excimer is formed only when the molecules have traveled a certain distance by molecular motion and attained a suitable orientation by diffusion-controlled process in the excited state. But Ferguson and Avis et al. discovered the excimer fluorescence展开更多
Nitric oxide(NO)participates in various pathways and revealing its dynamics is critical for resolving its pathophysiology.While there are methods available for detecting biological NO,few are capable of tracking NO dy...Nitric oxide(NO)participates in various pathways and revealing its dynamics is critical for resolving its pathophysiology.While there are methods available for detecting biological NO,few are capable of tracking NO dynamics.Herein,inspired by the cellular machinery of reversible thiol modification by NO,we have successfully designed a family of cysteine analogues tagged with fluorophores for visualizing cellular NO dynamics.展开更多
基金the National Natural Science Foundation of China(U1633203)the Major Project of the Civil Aviation Administration of China(J2020-108)。
文摘The products of monoammonium phosphate containing Cr^3+resulted in disqualification,and further posed a serious threat to ecological environment and human beings.Herein,the porous adsorbent of fluor(calcium silicate)composites(FCSc)was prepared by hydrothermal method using diatomaceous earth,hydrated lime and additive(NaF)as raw materials,which was characterized and used for the removal of Cr^3+from monoammonium phosphate solutions.The effects of different parameters,such as solution pH,initial Cr^3+concentration,temperature and contact time on the adsorption of Cr^3+onto FCSc were investigated in details.The results indicated that the adsorption process was in agreement with the pseudo-second-order kinetic model and Freundlich isotherm.The spontaneous and endothermic nature of the adsorption process was obtained by analyzing various thermodynamic parameters(△G0,△H0,and△S0).In addition,computational monte carlo simulations between Cr3+ions and FCSc were conducted to elucidate the adsorption mechanism.Such kind of porous adsorbent provided a potential application in the removal of impurities from monoammonium phosphate industry.
基金supported by the Tianjin Natural Science Foundation(No.06YFJZJC00300)the Natural Science Foundation of China(Nos.10674075,10774077,10674074,50802044 and 60736039)
文摘The simple approach to acquire the fltaxescenee spectra of vitamin bl, b2 and t6 is proposed by direct ilhanination on solid powder sample. The experimentally acquired fluorescence spectra are in accordance with the previous measurements on soluble samples. The fluorescence spectra for a mixture of vitamins bl, b2 and b6 with different concentrations have been investigated, and the fluorescence mechanism is explained on the basis of moleoalar struchture Possible reasons of the blue-shift of the fluorescence peak and enhancement of the peak power are explained as well. The advantages of solid powder method is analyzed and discussed.
文摘Purpose:to observe the occurrence rate of secondary caries on sjogren syndrome patients by filling carious cavities with simply using resin materials and fluor protector added resin materials.Method:20 cases of sjogren syndrome patients,who were filled the decayed teeth in the Stomatology Department of our hospital from September 2015 to September 2016,and 155 carious cavities were selected to be involved in the experiment,and secondary caries would be determined in 3 months,6 months and 12 months after filling of carious cavities.Result:the occurrence rates of secondary caries in the experimental group after treatment in 3 months,6 months,12 months were 1.37%,2.74%,5.48%respectively;while the rates in the control group were 4.87%,7.32%,13.41%respectively.There was statistical significance between differences of the occurrence rates of secondary caries in two groups.Conclusion:the occurrence of intraoral secondary caries of sjogren syndrome patients can be effectively reduced by using fluor protector after filling decayed teeth.
文摘Introduction: [<sup>18</sup>F]-fluoro-methylcholine (FCH) PET/CT and MRI with diffusion-weighted MRI (DW-MRI) have insufficient performance in lymph node staging of primary prostate cancer by themselves, but the combination may perform better. We aim to prospectively determine the diagnostic performance of combined FCH PET and MRI for lymph node staging. Methods: This was a single site study of diagnostic accuracy in a well-defined group of 21 consecutive high-risk primary prostate cancer patients (>30% chance of lymph node metastases) in a large community hospital. We performed FCH PET/CT and MRI with DW-MRI prior to endoscopic extended pelvic lymph node dissection (EPLND). PET was fused and interpreted together with various MRI image sets (T1, T2, DWIBS) and was only scored positive when a lymph node seen on MRI coincided with increased focal FCH uptake on PET. Findings were compared with detailed histological evaluation, on a per-patient and per-region level. We calculated sensitivity, specificity, positive and negative predictive value of combined PET-MRI. Results: 14 out of 21 patients had metastatic lymph nodes with 37 out of 164 evaluable regions harboring metastases. On a per-patient analysis, PET-MRI had a sensitivity/specificity of 79/100% with a PPV/NPV of 100/77%. On a per-region analysis (n = 164) these figure were 65/99% and 96/91%, respectively. Conclusions: Combined DW-MRI and FCH PET/CT has a very high positive predictive value in high risk prostate cancer patients. If confirmed in larger series a positive combined scan may safely allow cancellation of surgical staging in selected patients, depending on local protocols in N1 M0 patients.
文摘Since F?rster discovered the fluorescence spectrum of excimer in 1954, a lot of work has been done in this field. It is generally considered that there is no preformed excimer site in the ground state because the absorption spectrum is unchanged. Excimer is formed only when the molecules have traveled a certain distance by molecular motion and attained a suitable orientation by diffusion-controlled process in the excited state. But Ferguson and Avis et al. discovered the excimer fluorescence
基金supported by the National Natural Science Foundations of China(nos.22077112,21778048,81673489,31871414,and 81125023)Natural Science Foundation of Zhejiang Province,China(no.LR18H300001)National Science and Technology Major Project“Key New Drug Creation and Manufacturing Program”(nos.2018ZX09711002-010-004,2018ZX09711002-007-002,2019ZX09201001-003-009,2019ZX09201001-003-010,and 2019ZX09201001-004-010),K.C.Wong Education Foundation,and Singapore University of Technology and Design(SUTD)[SUTD-ZJU IDEA grant nos.T1SRCI17126 and SUTD-ZJU(VP)201905].
文摘Nitric oxide(NO)participates in various pathways and revealing its dynamics is critical for resolving its pathophysiology.While there are methods available for detecting biological NO,few are capable of tracking NO dynamics.Herein,inspired by the cellular machinery of reversible thiol modification by NO,we have successfully designed a family of cysteine analogues tagged with fluorophores for visualizing cellular NO dynamics.
