With isolated Rb–O units and PO_(4)tetrahedra,RbPbBi_(2)(PO_(4))_(3)exhibits three kinds of disorder in the crystal structure.Significantly,structures with isolated cation units like Cs–O,Rb–O and K–O units exhibi...With isolated Rb–O units and PO_(4)tetrahedra,RbPbBi_(2)(PO_(4))_(3)exhibits three kinds of disorder in the crystal structure.Significantly,structures with isolated cation units like Cs–O,Rb–O and K–O units exhibit quite high ratios of disorder in inorganic phosphates.We firstly put forward the concept of isolated soft units that can cause structural distortions of the crystal structure and is favorable for the appearance of structural disorder.In addition,the synthesis,IR spectra,UV-vis-NIR diffuse reflectance spectroscopy data,and thermal and second harmonic generation(SHG)tests of the title compound have been reported.展开更多
Objective To identify valid measures for preventing outbreaks of severe acute respiratory syndrome (SARS) among protected healthcare workers in isolation units.Methods Architectural factors, admitted SARS cases and in...Objective To identify valid measures for preventing outbreaks of severe acute respiratory syndrome (SARS) among protected healthcare workers in isolation units.Methods Architectural factors, admitted SARS cases and infection of healthcare workers in different isolation wards between January 30 and March 30, 2003 were analyzed.Results Four types of isolation wards were analyzed, including the ward where the thirty-first bed was located on the twelfth floor, the laminar flow ward in the Intensive Care Unit where the tenth bed was located on the fifteenth floor, the ward where the twenty-seventh bed was located on the thirteenth floor of the Lingnan Building, and thirty wards on the fourteenth to eighteenth floors of the Zhongshan Building. The ratios (m2/m3) of the area of the ventilation windows to the volume of the rooms were0, 0, 1:95 and 1:40, respectively. Numbers of SARS cases in the wards mentioned above were 1,1, 1 and 96, respectively. Total times of hospitalization were 43, 168, 110 and 1272 hours, respectively. The infection rates of the healthcare workers in the areas mentioned above were 73. 2% , 32.1%, 27.5% and 1.7%, respectively. The difference in the infection rates was of statistical significance.Conclusions Isolating SARS cases in wards with good ventilation could reduce the viral load of the ward and might be the key to preventing outbreaks of SARS among healthcare workers along with strict personal protection measures in isolation units.展开更多
基金supported by the Key Research Project of Frontier Science of the CAS(Grant No.QYZDB-SSW-JSC049)the Western Light Foundation of CAS(Grant No.2016-QNXZ-A-2)+4 种基金the Xinjiang International Science&Technology Cooperation Program(Grant No.2017E01014)the National Natural Science Foundation of China(Grant No.61835014 and 51425206)the National Key Research Project(Grant No.2016YFB0402104)the Xinjiang Key Research and Development Program(Grant No.2016B02021)the Major Program of Xinjiang Uygur Autonomous Region of China during the 13th Five-Year Plan Period(Grant No.2016A02003).
文摘With isolated Rb–O units and PO_(4)tetrahedra,RbPbBi_(2)(PO_(4))_(3)exhibits three kinds of disorder in the crystal structure.Significantly,structures with isolated cation units like Cs–O,Rb–O and K–O units exhibit quite high ratios of disorder in inorganic phosphates.We firstly put forward the concept of isolated soft units that can cause structural distortions of the crystal structure and is favorable for the appearance of structural disorder.In addition,the synthesis,IR spectra,UV-vis-NIR diffuse reflectance spectroscopy data,and thermal and second harmonic generation(SHG)tests of the title compound have been reported.
文摘Objective To identify valid measures for preventing outbreaks of severe acute respiratory syndrome (SARS) among protected healthcare workers in isolation units.Methods Architectural factors, admitted SARS cases and infection of healthcare workers in different isolation wards between January 30 and March 30, 2003 were analyzed.Results Four types of isolation wards were analyzed, including the ward where the thirty-first bed was located on the twelfth floor, the laminar flow ward in the Intensive Care Unit where the tenth bed was located on the fifteenth floor, the ward where the twenty-seventh bed was located on the thirteenth floor of the Lingnan Building, and thirty wards on the fourteenth to eighteenth floors of the Zhongshan Building. The ratios (m2/m3) of the area of the ventilation windows to the volume of the rooms were0, 0, 1:95 and 1:40, respectively. Numbers of SARS cases in the wards mentioned above were 1,1, 1 and 96, respectively. Total times of hospitalization were 43, 168, 110 and 1272 hours, respectively. The infection rates of the healthcare workers in the areas mentioned above were 73. 2% , 32.1%, 27.5% and 1.7%, respectively. The difference in the infection rates was of statistical significance.Conclusions Isolating SARS cases in wards with good ventilation could reduce the viral load of the ward and might be the key to preventing outbreaks of SARS among healthcare workers along with strict personal protection measures in isolation units.
