Dalian Institute of Chemical Physics (DICP) /Chinese Academy of Sciences (CAS) and Elsevier have concluded a publishing agreement for the Journa/of Natural Gas Chemistry (JNGC) on June 07, 2005. Beginning from 2...Dalian Institute of Chemical Physics (DICP) /Chinese Academy of Sciences (CAS) and Elsevier have concluded a publishing agreement for the Journa/of Natural Gas Chemistry (JNGC) on June 07, 2005. Beginning from 2006, Elsevier will publish JNGC on ScienceDirect, the online full text and bibliographic information resource, and take care of JNGC's international institutional print subscriptions. JNGC will also be covered in Elsevier's EI Compendex.展开更多
Dalian Institute of Chemical Physics (DICP) /Chinese Academy of Sciences (CAS) and Elsevier have concluded a publishing agreement for the Journal of Natural Gas Chemistry (JNGC) on June 07, 2005. Beginning from 2006, ...Dalian Institute of Chemical Physics (DICP) /Chinese Academy of Sciences (CAS) and Elsevier have concluded a publishing agreement for the Journal of Natural Gas Chemistry (JNGC) on June 07, 2005. Beginning from 2006, Elsevier will publish JNGC on ScienceDirect, the online full text and bibliographic information resource, and take care of JNGC’s international institutional print subscriptions. JNGC will also be covered in Elsevier’s EI Compendex.展开更多
Dalian Institute of Chemical Physics (DICP)/Chinese Academy of Sciences (CAS) and Elsevier have concluded a publishing agreement for the Journal of Natural Gas Chemistry (JNGC) on June 07, 2005. Beginning from 2...Dalian Institute of Chemical Physics (DICP)/Chinese Academy of Sciences (CAS) and Elsevier have concluded a publishing agreement for the Journal of Natural Gas Chemistry (JNGC) on June 07, 2005. Beginning from 2006, Elsevier will publish JNGC on ScienceDirect, the online full text and bibliographic information resource, and take care of JNGC's international institutional print subscriptions. JNGC will also be covered in Elsevier's EI Compendex.展开更多
The Hetai ductile shear zone-hosted gold deposit occurs in the deep-seated fault mylonite zone of the Sinian-Silurian metamorphic rock series. In this study there have been discovered melt inclusions, fluid-melt inclu...The Hetai ductile shear zone-hosted gold deposit occurs in the deep-seated fault mylonite zone of the Sinian-Silurian metamorphic rock series. In this study there have been discovered melt inclusions, fluid-melt inclusions and organic inclusions in ore-bearing quartz veins of the ore deposit and mylonite for the first time. The homogenization temperatures of the various types of inclusions are 160℃, 180-350℃, 530℃ and 870℃ for organic inclusions, liquid inclusions, two-phase immiscible liquid inclusions and melt inclusions, respectively. Ore fluid is categorized as the neutral to basic K\++-Ca\+\{2+\}-Mg\+\{2+\}-Na\++-SO\+\{2-\}\-4-HCO\+-\-3-Cl\+- system. The contents of trace gases follow a descending order of H\-2O>CO\-2>CH\-4> (or <) H\-2>CO>C\-2H\-2>C\-2H\-6>O\-2>N\-2. The concentrations of K\++, Ca\+\{2+\}, SO\+\{2-\}\-4, HCO\+-\-3, Cl\+-, H\-2O and C\-2H\-2 in fluid inclusions are related to the contents of gold and the Au/Ag ratios in ores from different levels of the gold deposit.This is significant for deep ore prospecting in the region. Daughter minerals in melt inclusions were analyzed using SEM. Quartz, orthoclase, wollastonite and other silicate minerals were identified. They were formed in different mineral assemblages. This analysis further proves the existence of melt inclusions in ore veins. Sedimentary metamorphic rocks could form silicate melts during metamorphic anatexis and dynamic metamorphism, which possess melt-solution characteristics. Ore formation is related to the multi-stage forming process of silicate melt and fluid.展开更多
[Mg(H2O)6](NTO)2·2H2O Was prepared by adding magnesium carbonate hydroxide to the aqueous solution of 3-nitro-1,2,4-triazol-5-one(NTO).Its thermal decomposition mechanism was studied by DSC,TG/DTGand IR.The...[Mg(H2O)6](NTO)2·2H2O Was prepared by adding magnesium carbonate hydroxide to the aqueous solution of 3-nitro-1,2,4-triazol-5-one(NTO).Its thermal decomposition mechanism was studied by DSC,TG/DTGand IR.The quantum chemical calculation on the title complex as a structure unit with the experimental geometry as atartmg values was carried out at B3LYP level with 6-31G basis set.The results show that the bonds between the coordinate waters and the Mgatom have certain extent covalent character.The net charges on nitrogen atoms of the NTO ring appear to be negative while the nitrogen atom on the nitro group(—NO2)appears to be positive which indicates—NO2 will lost first when the complex is heated to some uniform temperature and this result is in agreement with that of the thermal decomposition experiment.展开更多
Chemical bond properties of YBa 2Cu 3O 7 were studied by using the average ba nd-gap model. The calculated results show that the covalency of Cu(1)-O bond i s 0.406, and one of Cu(2)-O is 0.276. Mssbauer isomer shi...Chemical bond properties of YBa 2Cu 3O 7 were studied by using the average ba nd-gap model. The calculated results show that the covalency of Cu(1)-O bond i s 0.406, and one of Cu(2)-O is 0.276. Mssbauer isomer shifts of 57Fe in Y-123 were calculated by the chemical surrounding factor h v defined b y covalency and electronic polarizability. The charge-state and site of Fe were determined. The relation between the coupling constant of electron-phonon inte raction and covalency is employed to explain that the Cu(2)-O plane is more im portant than the Cu(1)-O chain on the superconductivity in the Y-123 compound s.展开更多
The Journal of Physical Chemistry(JPC)是在物理化学领域已有126年创刊历史,至今仍持续保持活力的专业刊物。针对其办刊策略进行分析,基于对重要事件的梳理,将发展历程分为3个阶段,并从主编、专刊设置、学术团体平台角度对其办刊策略...The Journal of Physical Chemistry(JPC)是在物理化学领域已有126年创刊历史,至今仍持续保持活力的专业刊物。针对其办刊策略进行分析,基于对重要事件的梳理,将发展历程分为3个阶段,并从主编、专刊设置、学术团体平台角度对其办刊策略进行分析总结,归纳出以下几点以供参考:(1)合适的主编人选应具有研究经历丰富、所研究领域为学科发展前沿、与学术团体关系紧密等特点;(2)专刊(专辑)的设置要根据学科的发展阶段,制订相应的组织策略;(3)学术期刊要始终坚持学术团体交流平台这一角色,根据学术团体的变化,在出版形式、刊文宗旨、出版内容等方面加以调整。展开更多
We perform a three-dimensional numerical simulation based on a one-step chemical reaction model to investigate changes in the mode of H2-Air detonation wave propagation from rotating detonation wave (RDW) mode to st...We perform a three-dimensional numerical simulation based on a one-step chemical reaction model to investigate changes in the mode of H2-Air detonation wave propagation from rotating detonation wave (RDW) mode to standing detonation wave mode. The physical characteristics of an RDW with injection velocity of 500 m/s are analyzed to investigate the physical mechanisms involved. We find that with increasing injection velocity, the detonation wave gradually changes from perpendicular to the head wall to parallel to the head wall. When the injection velocity exceeds the Chapman-Jouguet velocity VCJ (about 1984 m/s), the detonation wave changes orientation to become perpendicular to the fuel injection direction, and the rotating mode changes accordingly to a standing mode. Finally, the plane detonation characteristic triple-wave structures can be found from the standing mode.展开更多
文摘Dalian Institute of Chemical Physics (DICP) /Chinese Academy of Sciences (CAS) and Elsevier have concluded a publishing agreement for the Journa/of Natural Gas Chemistry (JNGC) on June 07, 2005. Beginning from 2006, Elsevier will publish JNGC on ScienceDirect, the online full text and bibliographic information resource, and take care of JNGC's international institutional print subscriptions. JNGC will also be covered in Elsevier's EI Compendex.
文摘Dalian Institute of Chemical Physics (DICP) /Chinese Academy of Sciences (CAS) and Elsevier have concluded a publishing agreement for the Journal of Natural Gas Chemistry (JNGC) on June 07, 2005. Beginning from 2006, Elsevier will publish JNGC on ScienceDirect, the online full text and bibliographic information resource, and take care of JNGC’s international institutional print subscriptions. JNGC will also be covered in Elsevier’s EI Compendex.
文摘Dalian Institute of Chemical Physics (DICP)/Chinese Academy of Sciences (CAS) and Elsevier have concluded a publishing agreement for the Journal of Natural Gas Chemistry (JNGC) on June 07, 2005. Beginning from 2006, Elsevier will publish JNGC on ScienceDirect, the online full text and bibliographic information resource, and take care of JNGC's international institutional print subscriptions. JNGC will also be covered in Elsevier's EI Compendex.
文摘The Hetai ductile shear zone-hosted gold deposit occurs in the deep-seated fault mylonite zone of the Sinian-Silurian metamorphic rock series. In this study there have been discovered melt inclusions, fluid-melt inclusions and organic inclusions in ore-bearing quartz veins of the ore deposit and mylonite for the first time. The homogenization temperatures of the various types of inclusions are 160℃, 180-350℃, 530℃ and 870℃ for organic inclusions, liquid inclusions, two-phase immiscible liquid inclusions and melt inclusions, respectively. Ore fluid is categorized as the neutral to basic K\++-Ca\+\{2+\}-Mg\+\{2+\}-Na\++-SO\+\{2-\}\-4-HCO\+-\-3-Cl\+- system. The contents of trace gases follow a descending order of H\-2O>CO\-2>CH\-4> (or <) H\-2>CO>C\-2H\-2>C\-2H\-6>O\-2>N\-2. The concentrations of K\++, Ca\+\{2+\}, SO\+\{2-\}\-4, HCO\+-\-3, Cl\+-, H\-2O and C\-2H\-2 in fluid inclusions are related to the contents of gold and the Au/Ag ratios in ores from different levels of the gold deposit.This is significant for deep ore prospecting in the region. Daughter minerals in melt inclusions were analyzed using SEM. Quartz, orthoclase, wollastonite and other silicate minerals were identified. They were formed in different mineral assemblages. This analysis further proves the existence of melt inclusions in ore veins. Sedimentary metamorphic rocks could form silicate melts during metamorphic anatexis and dynamic metamorphism, which possess melt-solution characteristics. Ore formation is related to the multi-stage forming process of silicate melt and fluid.
文摘[Mg(H2O)6](NTO)2·2H2O Was prepared by adding magnesium carbonate hydroxide to the aqueous solution of 3-nitro-1,2,4-triazol-5-one(NTO).Its thermal decomposition mechanism was studied by DSC,TG/DTGand IR.The quantum chemical calculation on the title complex as a structure unit with the experimental geometry as atartmg values was carried out at B3LYP level with 6-31G basis set.The results show that the bonds between the coordinate waters and the Mgatom have certain extent covalent character.The net charges on nitrogen atoms of the NTO ring appear to be negative while the nitrogen atom on the nitro group(—NO2)appears to be positive which indicates—NO2 will lost first when the complex is heated to some uniform temperature and this result is in agreement with that of the thermal decomposition experiment.
文摘Chemical bond properties of YBa 2Cu 3O 7 were studied by using the average ba nd-gap model. The calculated results show that the covalency of Cu(1)-O bond i s 0.406, and one of Cu(2)-O is 0.276. Mssbauer isomer shifts of 57Fe in Y-123 were calculated by the chemical surrounding factor h v defined b y covalency and electronic polarizability. The charge-state and site of Fe were determined. The relation between the coupling constant of electron-phonon inte raction and covalency is employed to explain that the Cu(2)-O plane is more im portant than the Cu(1)-O chain on the superconductivity in the Y-123 compound s.
文摘The Journal of Physical Chemistry(JPC)是在物理化学领域已有126年创刊历史,至今仍持续保持活力的专业刊物。针对其办刊策略进行分析,基于对重要事件的梳理,将发展历程分为3个阶段,并从主编、专刊设置、学术团体平台角度对其办刊策略进行分析总结,归纳出以下几点以供参考:(1)合适的主编人选应具有研究经历丰富、所研究领域为学科发展前沿、与学术团体关系紧密等特点;(2)专刊(专辑)的设置要根据学科的发展阶段,制订相应的组织策略;(3)学术期刊要始终坚持学术团体交流平台这一角色,根据学术团体的变化,在出版形式、刊文宗旨、出版内容等方面加以调整。
文摘We perform a three-dimensional numerical simulation based on a one-step chemical reaction model to investigate changes in the mode of H2-Air detonation wave propagation from rotating detonation wave (RDW) mode to standing detonation wave mode. The physical characteristics of an RDW with injection velocity of 500 m/s are analyzed to investigate the physical mechanisms involved. We find that with increasing injection velocity, the detonation wave gradually changes from perpendicular to the head wall to parallel to the head wall. When the injection velocity exceeds the Chapman-Jouguet velocity VCJ (about 1984 m/s), the detonation wave changes orientation to become perpendicular to the fuel injection direction, and the rotating mode changes accordingly to a standing mode. Finally, the plane detonation characteristic triple-wave structures can be found from the standing mode.