A new method for the determination of trace non-rare earth elements in high purity rare earth oxides by ICP-AES with preconcentration on an active carbon-silica gel microcolumn in a flow injection system is described ...A new method for the determination of trace non-rare earth elements in high purity rare earth oxides by ICP-AES with preconcentration on an active carbon-silica gel microcolumn in a flow injection system is described in this paper. Experimental parameters such as pH, flow rate,reagent concentration,length of reaction coil,eluent acidity,etc. were optimized. In the buffer solution of NH3. H2O/NH4Cl at pH 4. 6,Al,Cr,Cu,Fe, Pb, V and Zn can be preconcentrated and then eluted with 4. 5 mol/L nitric acid utilizing stop-flow technique. The enrichment factors were in range of 8. 1￣12. 6 with detection limits of μg/m level ,and the RSD with metals at μg/g level were 2. 3￣5. 0% (n= 7). The method proposed can reduce the matrix interference effectively , and has been applied to the determination of non-rare earth metals atμg/g level in high purity Eu2O3 with satisfactory results.展开更多
The VOF method is used to simulate the dynamics of a droplet interacting with a structure consisting of an array of microcolumns mounted on a flat surface.Such a specific configuration is intended to mimic the typical...The VOF method is used to simulate the dynamics of a droplet interacting with a structure consisting of an array of microcolumns mounted on a flat surface.Such a specific configuration is intended to mimic the typical properties of lotus leaves,which typically display regularly arranged micron-scale papillary structures.After setting the initial velocity of the simulated droplet on the basis of practical considerations,an analysis is conducted about the effect of the characteristic size of the microstructure on the apparent contact angle.The pressure variation in the microstructure caves is also examined.The simulation results show that the change of the contact angle of the droplet in the quasi-static state is consistent with theoretical calculations and the contact angle in the dynamic state is smaller than that in the quasi-static state.Moreover,under dynamic conditions,the pressure fluctuation in the microstructure cave depends essentially on the characteristic size of the microstructure.展开更多
目的对1例ABw亚型患者进行A型血浆置换后血型血清学变化以及是否发生溶血反应进行回顾性调查。方法使用微柱凝胶技术、微柱玻璃珠技术、盐水试管法、吸收放散等血型血清学方法及分子生物学方式进行ABO血型鉴定和基因分型,对患者血浆置...目的对1例ABw亚型患者进行A型血浆置换后血型血清学变化以及是否发生溶血反应进行回顾性调查。方法使用微柱凝胶技术、微柱玻璃珠技术、盐水试管法、吸收放散等血型血清学方法及分子生物学方式进行ABO血型鉴定和基因分型,对患者血浆置换前后实验室检查结果进行分析。结果该患者于行2000 mL A型血浆置换后转入本院,d 2检测正反定型相符;d 3检测反定B细胞凝集强度为±~1+,正反定型不符。经试管法、人源抗-B吸收放散试验确认存在B抗原,分子生物学鉴定为ABw03型。患者用A型血浆进行血浆置换后,血红蛋白、血小板计数均一过性下降,肌酐一过性轻度上升,谷丙转氨酶、谷草转氨酶持续下降,总胆红素和间接胆红素一过性下降后上升,提示存在轻微的溶血性输血反应。结论ABO亚型患者含弱A或B抗原,输注大量血浆可能引起溶血性输血反应。应严格按照ABO血型正反定型标准判断血型结果,对弱凝集采取额外实验室检查并结合分子生物学技术进行正确的判断和处理,可以减少ABO亚型的漏检,减少输血反应的发生。展开更多
文摘A new method for the determination of trace non-rare earth elements in high purity rare earth oxides by ICP-AES with preconcentration on an active carbon-silica gel microcolumn in a flow injection system is described in this paper. Experimental parameters such as pH, flow rate,reagent concentration,length of reaction coil,eluent acidity,etc. were optimized. In the buffer solution of NH3. H2O/NH4Cl at pH 4. 6,Al,Cr,Cu,Fe, Pb, V and Zn can be preconcentrated and then eluted with 4. 5 mol/L nitric acid utilizing stop-flow technique. The enrichment factors were in range of 8. 1￣12. 6 with detection limits of μg/m level ,and the RSD with metals at μg/g level were 2. 3￣5. 0% (n= 7). The method proposed can reduce the matrix interference effectively , and has been applied to the determination of non-rare earth metals atμg/g level in high purity Eu2O3 with satisfactory results.
基金funding from the China Scholarship Council(CSC)and Basic Scientific Research Projects of Liaoning Provincial Department of Education:‘Design and manufacture of bionic antifogging surface of optical glass lens based on nanosecond laser’(LJKMZ20220827).Y received the grant.
文摘The VOF method is used to simulate the dynamics of a droplet interacting with a structure consisting of an array of microcolumns mounted on a flat surface.Such a specific configuration is intended to mimic the typical properties of lotus leaves,which typically display regularly arranged micron-scale papillary structures.After setting the initial velocity of the simulated droplet on the basis of practical considerations,an analysis is conducted about the effect of the characteristic size of the microstructure on the apparent contact angle.The pressure variation in the microstructure caves is also examined.The simulation results show that the change of the contact angle of the droplet in the quasi-static state is consistent with theoretical calculations and the contact angle in the dynamic state is smaller than that in the quasi-static state.Moreover,under dynamic conditions,the pressure fluctuation in the microstructure cave depends essentially on the characteristic size of the microstructure.
文摘目的对1例ABw亚型患者进行A型血浆置换后血型血清学变化以及是否发生溶血反应进行回顾性调查。方法使用微柱凝胶技术、微柱玻璃珠技术、盐水试管法、吸收放散等血型血清学方法及分子生物学方式进行ABO血型鉴定和基因分型,对患者血浆置换前后实验室检查结果进行分析。结果该患者于行2000 mL A型血浆置换后转入本院,d 2检测正反定型相符;d 3检测反定B细胞凝集强度为±~1+,正反定型不符。经试管法、人源抗-B吸收放散试验确认存在B抗原,分子生物学鉴定为ABw03型。患者用A型血浆进行血浆置换后,血红蛋白、血小板计数均一过性下降,肌酐一过性轻度上升,谷丙转氨酶、谷草转氨酶持续下降,总胆红素和间接胆红素一过性下降后上升,提示存在轻微的溶血性输血反应。结论ABO亚型患者含弱A或B抗原,输注大量血浆可能引起溶血性输血反应。应严格按照ABO血型正反定型标准判断血型结果,对弱凝集采取额外实验室检查并结合分子生物学技术进行正确的判断和处理,可以减少ABO亚型的漏检,减少输血反应的发生。
