Social studies combines social sciences and the humanities, and has the purpose of raising effective citizens. There are many different areas integrated in social studies including history, geography, philosophy and p...Social studies combines social sciences and the humanities, and has the purpose of raising effective citizens. There are many different areas integrated in social studies including history, geography, philosophy and psychology. Social studies is the presentation of the information produced by these areas in framework of a curriculum. Social studies curriculum is a multi-dimensional program. One of the objectives of this program is to raise individuals who know about their past and shape their future with the help of the lessons they learn from history. In this context, the aim of this study is to determine sixth grade students＇ perspective to the history subjects in social studies curriculum, learn the place of history in their lives and see how history subjects are taught in classrooms. This study is limited to the 2014-2015 academic year. The participants were identified using random sampling, a probability-based sampling method. This is a qualitative study. The study includes interviews with eight sixth graders, of whom four were female and four were male. The study data were collected in semi-structured interviews. The interviews were recorded and transcribed. The data were analyzed using descriptive analysis. The study found that the students enjoyed learning history, had positive opinions about their history grades and their teachers continued to teach history using traditional methods. They also felt that history contributed to their lives. Based on the data collected, the study makes specific suggestions.展开更多
Deconjugation of cyclopent-2-enone aldols were attempted under various conditions, and the desired deconjugated product was achieved via dianion approach. Various results obtained in this study are explained by struct...Deconjugation of cyclopent-2-enone aldols were attempted under various conditions, and the desired deconjugated product was achieved via dianion approach. Various results obtained in this study are explained by structure and transition state analysis.展开更多
The struetural effect of the conjugative system(C)with carbonyl-imino bridges has been studied.The results show that:In the conjugated system(C),there is no electronic absorption peak attributable to the whole system,...The struetural effect of the conjugative system(C)with carbonyl-imino bridges has been studied.The results show that:In the conjugated system(C),there is no electronic absorption peak attributable to the whole system,but there are three π-π* bands each nt which displays chacactecistics of its own independently.These indicate that the two bridges-carbonyl-and-imino-can block the tlanSmlSSion of the conjngative polarization of the whole system,so as to form three segments,this is verified by means of chemical synthesis and degradation.展开更多
A self-consistent-field—configuration interaction(SCF-CI)procedure of studying highly excited vibrational states of bent triatomic molecules is suggested and its application to O_3 is investigated.
Recent years,many novel complexes have been prepared by using hetero-bidentate ligands.However,complexes with such ligands as 4-vinylpyridine which has two different coordinating sites have not been reported,and only ...Recent years,many novel complexes have been prepared by using hetero-bidentate ligands.However,complexes with such ligands as 4-vinylpyridine which has two different coordinating sites have not been reported,and only a few complexes of Cu(I)have been published^(1-3).The title complex Cu_2(C_5H_4N·CH=CH_2)_3Cl was prepared and characterized by elemental analyses,ICP,IR,and electronic spectra.Its conductivity,oxidation potential and reduction potential were measured.展开更多
The kinetic study of carbonylation of methanol-acetic acid mixture to acetic acid and acetic anhydride over a cis-dicarbonylrhodium complex (MVM' Rh) coordinated with the ethylene diacrylate (M') crosslinked c...The kinetic study of carbonylation of methanol-acetic acid mixture to acetic acid and acetic anhydride over a cis-dicarbonylrhodium complex (MVM' Rh) coordinated with the ethylene diacrylate (M') crosslinked copolymer of methyl acrylate (M) and 2-vinylpyddine (V)shows that the rate of reaction is zero order with respect to both reactants methanol and carbon monoxide, but first order in the concentrations of promoter methyl iodide and rhodium in the complex. Polar solvents can accelerate the reaction. Activation parameters were calculated from the experimental results, being comparable to that of the homogeneous system. A mechanism similar to that of soluble rhodium catalyst was proposed.展开更多
文摘Social studies combines social sciences and the humanities, and has the purpose of raising effective citizens. There are many different areas integrated in social studies including history, geography, philosophy and psychology. Social studies is the presentation of the information produced by these areas in framework of a curriculum. Social studies curriculum is a multi-dimensional program. One of the objectives of this program is to raise individuals who know about their past and shape their future with the help of the lessons they learn from history. In this context, the aim of this study is to determine sixth grade students＇ perspective to the history subjects in social studies curriculum, learn the place of history in their lives and see how history subjects are taught in classrooms. This study is limited to the 2014-2015 academic year. The participants were identified using random sampling, a probability-based sampling method. This is a qualitative study. The study includes interviews with eight sixth graders, of whom four were female and four were male. The study data were collected in semi-structured interviews. The interviews were recorded and transcribed. The data were analyzed using descriptive analysis. The study found that the students enjoyed learning history, had positive opinions about their history grades and their teachers continued to teach history using traditional methods. They also felt that history contributed to their lives. Based on the data collected, the study makes specific suggestions.
文摘Deconjugation of cyclopent-2-enone aldols were attempted under various conditions, and the desired deconjugated product was achieved via dianion approach. Various results obtained in this study are explained by structure and transition state analysis.
文摘The struetural effect of the conjugative system(C)with carbonyl-imino bridges has been studied.The results show that:In the conjugated system(C),there is no electronic absorption peak attributable to the whole system,but there are three π-π* bands each nt which displays chacactecistics of its own independently.These indicate that the two bridges-carbonyl-and-imino-can block the tlanSmlSSion of the conjngative polarization of the whole system,so as to form three segments,this is verified by means of chemical synthesis and degradation.
文摘A self-consistent-field—configuration interaction(SCF-CI)procedure of studying highly excited vibrational states of bent triatomic molecules is suggested and its application to O_3 is investigated.
文摘Recent years,many novel complexes have been prepared by using hetero-bidentate ligands.However,complexes with such ligands as 4-vinylpyridine which has two different coordinating sites have not been reported,and only a few complexes of Cu(I)have been published^(1-3).The title complex Cu_2(C_5H_4N·CH=CH_2)_3Cl was prepared and characterized by elemental analyses,ICP,IR,and electronic spectra.Its conductivity,oxidation potential and reduction potential were measured.
基金This work was supported by a Grant from the National Natural Science Foundation of China
文摘The kinetic study of carbonylation of methanol-acetic acid mixture to acetic acid and acetic anhydride over a cis-dicarbonylrhodium complex (MVM' Rh) coordinated with the ethylene diacrylate (M') crosslinked copolymer of methyl acrylate (M) and 2-vinylpyddine (V)shows that the rate of reaction is zero order with respect to both reactants methanol and carbon monoxide, but first order in the concentrations of promoter methyl iodide and rhodium in the complex. Polar solvents can accelerate the reaction. Activation parameters were calculated from the experimental results, being comparable to that of the homogeneous system. A mechanism similar to that of soluble rhodium catalyst was proposed.
