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
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
As is well known, the fluorescence spectra of amino-acids can be varied greatly by pH. However, up to date, the effect of organic or inorganic acid on the fluorescence spectra of non-ionic organic compounds is not cle...As is well known, the fluorescence spectra of amino-acids can be varied greatly by pH. However, up to date, the effect of organic or inorganic acid on the fluorescence spectra of non-ionic organic compounds is not clear, although much attention has been paid to this subject in the present decadee. In 1969, Smith reported that the fluorescence of methoxybenzene can be quenched by acid. He has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
Polymers containing chromophores on the side chain like polystyrene, polyvinylnaphthalene or in the main chain like polyethylene-2,6 naphthalenedicarboxylate (PEN) show both monomer and exeimer fluorescence in solutio...Polymers containing chromophores on the side chain like polystyrene, polyvinylnaphthalene or in the main chain like polyethylene-2,6 naphthalenedicarboxylate (PEN) show both monomer and exeimer fluorescence in solutions, but only the excimer fluorescence in solid films. This fact remains not unambiguously explained.展开更多
Xunwu Rare Earth Corporation has introducedP507 reduction extraction process from Anhui Re-search Institute of Metallurgy to prepare europiumoxide of fluorescent grade in one step.The processhas been employed in a pro...Xunwu Rare Earth Corporation has introducedP507 reduction extraction process from Anhui Re-search Institute of Metallurgy to prepare europiumoxide of fluorescent grade in one step.The processhas been employed in a production line in the corpo-ration.And after three months industrial experi-ment,all the technical indexes reached the展开更多
The radiation is considered as a double edged sword, as its beneficial and detrimental effects have been demonstrated. The potential benefits are being exploited to its maximum by adopting safe handling of radionuclid...The radiation is considered as a double edged sword, as its beneficial and detrimental effects have been demonstrated. The potential benefits are being exploited to its maximum by adopting safe handling of radionuclide stipulated by the regulatory agencies. While the occupational workers are monitored by personnel monitoring devices, for general publics, it is not a regular practice. However, it can be achieved by using biomarkers with a potential for the radiation triage and medical management. An ideal biomarker to adopt in those situations should be rapid, specific, sensitive, reproducible, and able to categorize the nature of exposure and could provide a reliable dose estimation irrespective of the time of the exposures. Since cytogenetic markers shown to have many advantages relatively than other markers, the origins of various chromosomal abnormalities induced by ionizing radiations along with dose-response curves generated in the laboratory are presented. Current status of the gold standard dicentric chromosome assay, micronucleus assay, translocation measurement by fluorescence insitu hybridization and an emerging protein marker the g-H2 AX assay are discussed with our laboratory data. With the wide choice of methods, an appropriate assay can be employed based on the net.展开更多
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
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
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.
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.
文摘As is well known, the fluorescence spectra of amino-acids can be varied greatly by pH. However, up to date, the effect of organic or inorganic acid on the fluorescence spectra of non-ionic organic compounds is not clear, although much attention has been paid to this subject in the present decadee. In 1969, Smith reported that the fluorescence of methoxybenzene can be quenched by acid. He has
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
文摘Polymers containing chromophores on the side chain like polystyrene, polyvinylnaphthalene or in the main chain like polyethylene-2,6 naphthalenedicarboxylate (PEN) show both monomer and exeimer fluorescence in solutions, but only the excimer fluorescence in solid films. This fact remains not unambiguously explained.
文摘Xunwu Rare Earth Corporation has introducedP507 reduction extraction process from Anhui Re-search Institute of Metallurgy to prepare europiumoxide of fluorescent grade in one step.The processhas been employed in a production line in the corpo-ration.And after three months industrial experi-ment,all the technical indexes reached the
基金Supported by Department of Science and Technology,Government of India,No.SR-SO/HS-127/2012Defence Research and Development Organisation,Government of India,No.DLS/81/48222/LSRB-261Atomic Energy Regulatory Board,Government of India(AERB/CSRP/Proj.No.58/04/2014)
文摘The radiation is considered as a double edged sword, as its beneficial and detrimental effects have been demonstrated. The potential benefits are being exploited to its maximum by adopting safe handling of radionuclide stipulated by the regulatory agencies. While the occupational workers are monitored by personnel monitoring devices, for general publics, it is not a regular practice. However, it can be achieved by using biomarkers with a potential for the radiation triage and medical management. An ideal biomarker to adopt in those situations should be rapid, specific, sensitive, reproducible, and able to categorize the nature of exposure and could provide a reliable dose estimation irrespective of the time of the exposures. Since cytogenetic markers shown to have many advantages relatively than other markers, the origins of various chromosomal abnormalities induced by ionizing radiations along with dose-response curves generated in the laboratory are presented. Current status of the gold standard dicentric chromosome assay, micronucleus assay, translocation measurement by fluorescence insitu hybridization and an emerging protein marker the g-H2 AX assay are discussed with our laboratory data. With the wide choice of methods, an appropriate assay can be employed based on the net.
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.
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.
