A hydrochemical and tracer study(uranine injection) was conducted in Jurassic limestone of the Posht-e-Naz area in the Alborz belt to evaluate hydraulic relations between a large diameter(about 100 m) sinkhole and spr...A hydrochemical and tracer study(uranine injection) was conducted in Jurassic limestone of the Posht-e-Naz area in the Alborz belt to evaluate hydraulic relations between a large diameter(about 100 m) sinkhole and springs and aquifer parameters.A main goal of the project was to find out the source of turbidity of the Emarate drinking water supply spring(SP4) in rainy season.Springs discharge were measured and hydrochemical investigation were carried out.The uranine tracer was injected and eight springs,three wells and the Neka River were selected and totally 989 samples in 107 days were collected.Hydrochemical data demonstrated a relative connection between sinkhole(Sh1) and spring(SP4).The results of the tracing by sampling water indicated only a hydraulic connection between Sange-Nou spring(SP8) and injection point,while the charcoal packets analysis revealed tracer exits from spring numbers SP1,SP3,SP4,SP5,SP8,in wells W1 and W2,and in the Neka River.The concentration-time curves of charcoal packets for qualitative analysis and exit tracer for quantitative analysis is also assessed.展开更多
A novel metabolic chemical reporter of Ac_(3)6deo Glc NAz was developed and confirmed as an effective probe for O-Glc NAc modification. Ac_(3)6deo Glc NAz labeling predominantly occurs in intracellular OGlc NAcylated ...A novel metabolic chemical reporter of Ac_(3)6deo Glc NAz was developed and confirmed as an effective probe for O-Glc NAc modification. Ac_(3)6deo Glc NAz labeling predominantly occurs in intracellular OGlc NAcylated proteins rather than cell-surface glycoproteins. Of note, it could reduce the artificial S-glycomodification compared to Ac_(4)Gal NAz and Ac_(4)Glc NAz. This new reporter allows to be widely used in the field of proteomic identification of O-Glc NAcylation.展开更多
In order to explore synthetic method of pure sodium pyroxene,the pure chemical reagents of Na2CO3,Fe（OH）3 and H2SiO3were used as raw materials,and the possible solid phase reactions for Na2CO3-Fe（OH）3-H2SiO3system...In order to explore synthetic method of pure sodium pyroxene,the pure chemical reagents of Na2CO3,Fe（OH）3 and H2SiO3were used as raw materials,and the possible solid phase reactions for Na2CO3-Fe（OH）3-H2SiO3system in heating process had been studied by means of differential thermal analysis（DTA）and X-ray diffraction（XRD）. The influencing factors of sodium pyroxene（NaFeSi2O6）synthetic reaction,such as sintering temperature and holding time,had also been studied.The results show that sodium pyroxene can be largely synthesized at 737℃;it is helpful for synthesis of sodium pyroxene to increase sintering temperature appropriately,and the best temperature should be controlled at 900℃or so,because it will melt and decompose at temperatures higher than 900℃.In those influencing factors of sodium pyroxene synthesis the most important is temperature.The results will be helpful for providing pure NaFeSi2O6for further research on the formation of SFCA for NaFeSi2O6-KAlSi2O3-CaO-Fe2O3-CaF2 system in the sintering process of Bayan-obo iron ore.展开更多
文摘A hydrochemical and tracer study(uranine injection) was conducted in Jurassic limestone of the Posht-e-Naz area in the Alborz belt to evaluate hydraulic relations between a large diameter(about 100 m) sinkhole and springs and aquifer parameters.A main goal of the project was to find out the source of turbidity of the Emarate drinking water supply spring(SP4) in rainy season.Springs discharge were measured and hydrochemical investigation were carried out.The uranine tracer was injected and eight springs,three wells and the Neka River were selected and totally 989 samples in 107 days were collected.Hydrochemical data demonstrated a relative connection between sinkhole(Sh1) and spring(SP4).The results of the tracing by sampling water indicated only a hydraulic connection between Sange-Nou spring(SP8) and injection point,while the charcoal packets analysis revealed tracer exits from spring numbers SP1,SP3,SP4,SP5,SP8,in wells W1 and W2,and in the Neka River.The concentration-time curves of charcoal packets for qualitative analysis and exit tracer for quantitative analysis is also assessed.
基金supported by the National Natural Science Foundation of China (Nos. 81901622, 31770987, 81971497 and 21907022)Key R&D and Promotion Special Project in Henan Province (Nos. 212102310185, 212102310899)+1 种基金Key Scientific Research Projects in Henan Colleges and Universities (No. 20A350001)Joint Construction Project of Henan Medical Science and Technology Project (No. LHGJ20210566)。
文摘A novel metabolic chemical reporter of Ac_(3)6deo Glc NAz was developed and confirmed as an effective probe for O-Glc NAc modification. Ac_(3)6deo Glc NAz labeling predominantly occurs in intracellular OGlc NAcylated proteins rather than cell-surface glycoproteins. Of note, it could reduce the artificial S-glycomodification compared to Ac_(4)Gal NAz and Ac_(4)Glc NAz. This new reporter allows to be widely used in the field of proteomic identification of O-Glc NAcylation.
基金Item Sponsored by National Natural Science Foundation of China (50944049)
文摘In order to explore synthetic method of pure sodium pyroxene,the pure chemical reagents of Na2CO3,Fe（OH）3 and H2SiO3were used as raw materials,and the possible solid phase reactions for Na2CO3-Fe（OH）3-H2SiO3system in heating process had been studied by means of differential thermal analysis（DTA）and X-ray diffraction（XRD）. The influencing factors of sodium pyroxene（NaFeSi2O6）synthetic reaction,such as sintering temperature and holding time,had also been studied.The results show that sodium pyroxene can be largely synthesized at 737℃;it is helpful for synthesis of sodium pyroxene to increase sintering temperature appropriately,and the best temperature should be controlled at 900℃or so,because it will melt and decompose at temperatures higher than 900℃.In those influencing factors of sodium pyroxene synthesis the most important is temperature.The results will be helpful for providing pure NaFeSi2O6for further research on the formation of SFCA for NaFeSi2O6-KAlSi2O3-CaO-Fe2O3-CaF2 system in the sintering process of Bayan-obo iron ore.
