[Objective] The aim was to better research the function and action mode of High Mobility Group B （HMGB） proteins in higher plants. [Method] At2G33450,At5G23405 and At5G23420 genes of HMGB protein family in Arabidops...[Objective] The aim was to better research the function and action mode of High Mobility Group B （HMGB） proteins in higher plants. [Method] At2G33450,At5G23405 and At5G23420 genes of HMGB protein family in Arabidopsis thaliana were cloned by the use of RT-PCR method,and the expression of these three proteins in E.coli and Arabidopsis thaliana were detected by using SDS-PAGE,Northern blot and subcellular localization methods. [Result] The results showed that the molecular weights of the three proteins were 17.5,17.0 and 27.0 kD respectively,and the expression levels of the proteins in Arabidopsis thaliana were At5G23420At5G23405At2G33450. In addition,all the three proteins were located in nucleus. [Conclusion] The study will provide a basis for the further research on the biological function of HMGB proteins in higher plants.展开更多
This paper aims to examine New Economics of Labor Migration (NELM) in the northwestern Guangxi, China and investigate the relationships among rural-urban migration, rural household income and local geographical contex...This paper aims to examine New Economics of Labor Migration (NELM) in the northwestern Guangxi, China and investigate the relationships among rural-urban migration, rural household income and local geographical contexts. Stratified sampling and typical case study were adopted and 236 questionnaires were collected from four vil- lages, Daxin, Lixin, Longhe and Yongchang. We analyzed the rural-urban migration rate, household income and local geographical factors, focusing on the ratio of remittance income to total household income. Data descriptions and sta- tistical methods, such as Pearson Chi-square test, Contingency coefficient, Eta, Pearson correlation coefficient, t-test, multiple comparisons (LSD test, Tamhane T2, Dunnett T3 and Dunnet C test) were used. The results are as follows. Rural households’ income is diversified in survey villages so the motivation of rural-urban migration in the study area can be partly explained by NELM. The migration rate of households (the percentage of households with migrants in survey households) in survey villages varies from 50% to 86%, while the proportion of remittance income to house- hold income is in the range of 30% to 80%. In the village of Yongchang, with the least average arable land area per household, the remittance income plays a vital role in household income (80%). And the statistical findings show that the proportion is significantly and negatively correlated with arable land area per household. The conclusion is that di- rect effect of migration, i.e., the contribution of remittance to household income, is negatively correlated with the con- tribution of resources to local income.展开更多
The relationship between out-migration of labor in the Qinling mountain area and households' firewood consumption is explored. Migration and remittances reduce households' firewood consumption due to increases...The relationship between out-migration of labor in the Qinling mountain area and households' firewood consumption is explored. Migration and remittances reduce households' firewood consumption due to increases in both income and opportunity cost of firewood collection. Previous studies have been equivocal because they ignored uncertainty in household economy, which is widespread in forest areas of less developed countries. This study provides additional insight by considering vulnerability and subjective assessment of poverty generated by unstable income and an uncertain future. We provide evidence that the amount of firewood consumed depends on income and opportunity cost of firewood collection, but also on a prudent consumption strategy, due to farmers' subjective assessment of their future possible poverty. We also find out-migration of labor can reduce per capita firewood consumption but subjective poverty also acts against reduction of firewood consumption.展开更多
Abstract： Migration process has become increasingly important in recent research on population and the environment. A majority of the existing migration and environment literature has focused on the environmental cau...Abstract： Migration process has become increasingly important in recent research on population and the environment. A majority of the existing migration and environment literature has focused on the environmental causes and determinants of migration. With the largest rural-to-urban migration flow in world history, and growing concerns about the environmental problems accompanying its fast economic development, China provides a particularly important case for migration and environment research. This paper reviews major migration theories and recent research on environmental effects on migration, with specific attention to the influences of en- vironmental factors on rural-to-urban labor migration in China. A comprehensive multilevel conceptual framework is developed for studying the environmental causes of rural-to-urban migration in China. The effects of land resources on household labor migration decisions in rural China are explored to illustrate the application of this framework.展开更多
The purpose of this study is to analyze economic impacts of reducing greenhouse gases emissions significantly. A large amount of emissions reductions are required throughout this century to avoid dangerous climate cha...The purpose of this study is to analyze economic impacts of reducing greenhouse gases emissions significantly. A large amount of emissions reductions are required throughout this century to avoid dangerous climate change, and understanding the economic consequences under such situations is important and meaningful. The AIM/CGE [Global] model, a recursive dynamic computable general equilibrium model on a global scale, is applied to analyze carbon prices and changes in GDP when implementing five policy scenarios represented by emissions pathways, respectively. As a result of the analysis, higher carbon prices and larger decreases in GDP compared to the baseline emissions scenario are observed when emissions are reduced more deeply. However, such GDP losses are rather small and insignificant compared to the GDP growth observed throughout the century. These results suggest that although it is challenging to reduce emissions until the level to avoid dangerous climate change, there is a sufficient possibility to achieve it from economic perspectives.展开更多
Some sociologists of the 20th century--Popper, Nisbet, Tilly, Wallerstein--doubted the applicability of the concept ＂evolution＂ to the process of social changes. It was stated that processes happening in a society c...Some sociologists of the 20th century--Popper, Nisbet, Tilly, Wallerstein--doubted the applicability of the concept ＂evolution＂ to the process of social changes. It was stated that processes happening in a society cannot be described using the approach of strict causality. However, dignifying life of the mankind is doubtful without elaborated scheme of social evolution and universal guiding line for the control over the further aociety evolution. General logica of social evolution can be traced by the change of human position in a society. Describing this change with the help of the activity-value approach one can construct ideal types of such evolutionary stages as wilderness, barbarism, civilization. The study of features and properties of ideal types of social evolution stages shows the regularity of two natural civilizations appearance： home-service civilization and market one. Countries of home-service civilization are ancient Egypt, China, and Russia （since Moscow Kingdom arose）. Athens, Novgorod Republic and Western countries are examples of the market civilization. The study of the market civilization properties shows that its long existence is doubtful. Authors propose an ideal type of spirit-game civilization as a long-term guiding line for the controlled social evolution. Control over evolution could save mankind and solve their main problems.展开更多
Studies on the sources of change in the Chinese legal system are usually based on the statist epistemology, i.e. the will of the state directs and even determines all aspects of change in the legal system. Although th...Studies on the sources of change in the Chinese legal system are usually based on the statist epistemology, i.e. the will of the state directs and even determines all aspects of change in the legal system. Although this epistemology can partially explain the re-creation of the Chinese legal system during the earlier period of reform and opening up, it fails to provide a comprehensive picture of the present complex situation. Taking as an example the changes in the Chinese legal profession during reform and opening up, this study employs quantitative data and empirical methods to explore the multiple dynamic impacts of the state, the market and society on the Chinese legal system. The study also proposes a theoretical framework of ＂structural constraints＂ on legal change. Since reform and opening up, the Chinese legal system has undergone a transition from state dominance to multi-agent interactions between the state, the market, society, and the legal system itself.展开更多
文摘[Objective] The aim was to better research the function and action mode of High Mobility Group B （HMGB） proteins in higher plants. [Method] At2G33450,At5G23405 and At5G23420 genes of HMGB protein family in Arabidopsis thaliana were cloned by the use of RT-PCR method,and the expression of these three proteins in E.coli and Arabidopsis thaliana were detected by using SDS-PAGE,Northern blot and subcellular localization methods. [Result] The results showed that the molecular weights of the three proteins were 17.5,17.0 and 27.0 kD respectively,and the expression levels of the proteins in Arabidopsis thaliana were At5G23420At5G23405At2G33450. In addition,all the three proteins were located in nucleus. [Conclusion] The study will provide a basis for the further research on the biological function of HMGB proteins in higher plants.
基金Under the auspices of the Key Project of National Natural Science Foundation of China (No. 40635029)"985" Proje- ct of Central University for Nationalities (No. 985-2-103-1)
文摘This paper aims to examine New Economics of Labor Migration (NELM) in the northwestern Guangxi, China and investigate the relationships among rural-urban migration, rural household income and local geographical contexts. Stratified sampling and typical case study were adopted and 236 questionnaires were collected from four vil- lages, Daxin, Lixin, Longhe and Yongchang. We analyzed the rural-urban migration rate, household income and local geographical factors, focusing on the ratio of remittance income to total household income. Data descriptions and sta- tistical methods, such as Pearson Chi-square test, Contingency coefficient, Eta, Pearson correlation coefficient, t-test, multiple comparisons (LSD test, Tamhane T2, Dunnett T3 and Dunnet C test) were used. The results are as follows. Rural households’ income is diversified in survey villages so the motivation of rural-urban migration in the study area can be partly explained by NELM. The migration rate of households (the percentage of households with migrants in survey households) in survey villages varies from 50% to 86%, while the proportion of remittance income to house- hold income is in the range of 30% to 80%. In the village of Yongchang, with the least average arable land area per household, the remittance income plays a vital role in household income (80%). And the statistical findings show that the proportion is significantly and negatively correlated with arable land area per household. The conclusion is that di- rect effect of migration, i.e., the contribution of remittance to household income, is negatively correlated with the con- tribution of resources to local income.
基金supported by the National Social Science Foundation of China (Grant No. 09CJY071)Program for Innovative Talents of Higher Learning Institutions of Shanxi
文摘The relationship between out-migration of labor in the Qinling mountain area and households' firewood consumption is explored. Migration and remittances reduce households' firewood consumption due to increases in both income and opportunity cost of firewood collection. Previous studies have been equivocal because they ignored uncertainty in household economy, which is widespread in forest areas of less developed countries. This study provides additional insight by considering vulnerability and subjective assessment of poverty generated by unstable income and an uncertain future. We provide evidence that the amount of firewood consumed depends on income and opportunity cost of firewood collection, but also on a prudent consumption strategy, due to farmers' subjective assessment of their future possible poverty. We also find out-migration of labor can reduce per capita firewood consumption but subjective poverty also acts against reduction of firewood consumption.
基金funded by dissertation research grants from the Geography and Spatial Sciences Program of the National Science Foundation,the Worldwide Universities Network,and the Rural Sociological Society
文摘Abstract： Migration process has become increasingly important in recent research on population and the environment. A majority of the existing migration and environment literature has focused on the environmental causes and determinants of migration. With the largest rural-to-urban migration flow in world history, and growing concerns about the environmental problems accompanying its fast economic development, China provides a particularly important case for migration and environment research. This paper reviews major migration theories and recent research on environmental effects on migration, with specific attention to the influences of en- vironmental factors on rural-to-urban labor migration in China. A comprehensive multilevel conceptual framework is developed for studying the environmental causes of rural-to-urban migration in China. The effects of land resources on household labor migration decisions in rural China are explored to illustrate the application of this framework.
文摘The purpose of this study is to analyze economic impacts of reducing greenhouse gases emissions significantly. A large amount of emissions reductions are required throughout this century to avoid dangerous climate change, and understanding the economic consequences under such situations is important and meaningful. The AIM/CGE [Global] model, a recursive dynamic computable general equilibrium model on a global scale, is applied to analyze carbon prices and changes in GDP when implementing five policy scenarios represented by emissions pathways, respectively. As a result of the analysis, higher carbon prices and larger decreases in GDP compared to the baseline emissions scenario are observed when emissions are reduced more deeply. However, such GDP losses are rather small and insignificant compared to the GDP growth observed throughout the century. These results suggest that although it is challenging to reduce emissions until the level to avoid dangerous climate change, there is a sufficient possibility to achieve it from economic perspectives.
文摘Some sociologists of the 20th century--Popper, Nisbet, Tilly, Wallerstein--doubted the applicability of the concept ＂evolution＂ to the process of social changes. It was stated that processes happening in a society cannot be described using the approach of strict causality. However, dignifying life of the mankind is doubtful without elaborated scheme of social evolution and universal guiding line for the control over the further aociety evolution. General logica of social evolution can be traced by the change of human position in a society. Describing this change with the help of the activity-value approach one can construct ideal types of such evolutionary stages as wilderness, barbarism, civilization. The study of features and properties of ideal types of social evolution stages shows the regularity of two natural civilizations appearance： home-service civilization and market one. Countries of home-service civilization are ancient Egypt, China, and Russia （since Moscow Kingdom arose）. Athens, Novgorod Republic and Western countries are examples of the market civilization. The study of the market civilization properties shows that its long existence is doubtful. Authors propose an ideal type of spirit-game civilization as a long-term guiding line for the controlled social evolution. Control over evolution could save mankind and solve their main problems.
基金financial support from the Shanghai Oriental Scholar research project (2011)
文摘Studies on the sources of change in the Chinese legal system are usually based on the statist epistemology, i.e. the will of the state directs and even determines all aspects of change in the legal system. Although this epistemology can partially explain the re-creation of the Chinese legal system during the earlier period of reform and opening up, it fails to provide a comprehensive picture of the present complex situation. Taking as an example the changes in the Chinese legal profession during reform and opening up, this study employs quantitative data and empirical methods to explore the multiple dynamic impacts of the state, the market and society on the Chinese legal system. The study also proposes a theoretical framework of ＂structural constraints＂ on legal change. Since reform and opening up, the Chinese legal system has undergone a transition from state dominance to multi-agent interactions between the state, the market, society, and the legal system itself.
