There are many important ancient buildings left in Bofang Village with a long history.The Xianweng Temple located in the north of the village is the only Taoist building in the ancient building group of Bofang Village...There are many important ancient buildings left in Bofang Village with a long history.The Xianweng Temple located in the north of the village is the only Taoist building in the ancient building group of Bofang Village.Its historical origin can be traced back to Tang and Song dynasties.The temple is a collection of gardens,buildings,painted in one place,all aspects of the achievement is quite high.Through the study of the decorative art characteristics of Xien-weng Temple in Bofang Village,Gaoping,this paper summarizes the artistic characteristics of Taoist architectural decoration in Shanxi,excavates the great value of its existence,and inspires more people to reflect on the protection of ancient buildings.展开更多
Abundant phosphatized acritarchs are preserved in the late Precambrian （Ediacaran） Doushantuo Formation at Weng＇an, Guizhou Province, southwest China. Most of them are large with various spinous ornaments and multi...Abundant phosphatized acritarchs are preserved in the late Precambrian （Ediacaran） Doushantuo Formation at Weng＇an, Guizhou Province, southwest China. Most of them are large with various spinous ornaments and multilayered outer walls. The general characters of these fossils are quite similar to those found from the homochronous deposits of the Yangtze Gorges, southern China. Therefore the Doushantuo Formation in the Weng＇an area can be correlated directly with the Doushantuo Formation of the Yangtze Gorges. Four species in four genera, including two new genera, two new species and one uncertain species are systematically described for the first time from the studied locality. The taxa are Bacatisphaera baokangensis Zhou, Brasier et Xue, 2001, Taeniosphaera doushantuoensis gen. et sp. nov., Rugospinasphaera speciosa gen. et sp. nov. and Meghystichosphaeridium sp. The new data enriches the famous Weng＇an biota, especially the marine microplankton flora in the Ediacaran Doushantuo Formation.展开更多
Low oil prices under the influence of economic structure transformation and slow economic growth have hit the existing markets of traditional big oil suppliers and upgraded the conflict of oil production capacity and ...Low oil prices under the influence of economic structure transformation and slow economic growth have hit the existing markets of traditional big oil suppliers and upgraded the conflict of oil production capacity and interest between OPEC producers and other big oil supplier countries such as the USA and Russia. Forecasting global oil production is significant for all countries for energy strategy planning, although many past forecasts have later been proved to be very seriously incorrect. In this paper,the original generalized Weng model is expanded to a multi-cycle generalized Weng model to better reflect the multi-cycle phenomena caused by political, economic and technological factors. This is used to forecast global oil production based on parameter selection from a large sample, depletion rate of remaining resources, constraints on oil reserves and cycle number determination. This research suggests that the world will reach its peak oil production in 2022, at about 4340×10~6 tonnes. China needs to plan for oil import diversity, a domestic oil production structure based on the supply pattern of large oil suppliers worldwide and the oil demand for China＇s own development.展开更多
[Objectives]To screen optimum conditions of HPLC and TLC for qualitative discrimination of berberine hydrochloride contained in Jin Weng Zhili Particle,thus providing basis for quality standard. [Methods]According to ...[Objectives]To screen optimum conditions of HPLC and TLC for qualitative discrimination of berberine hydrochloride contained in Jin Weng Zhili Particle,thus providing basis for quality standard. [Methods]According to the method described in Chinese Veterinary Pharmacopoeia,thin layer chromatography and high performance liquid chromatography were used respectively for qualitative and quantitative identification of berberine hydrochloride contained in Jin Weng Zhili Particle by improving the conditions of extraction and purification. [Results]After optimizing TLC conditions of Jin Weng Zhili Particle,the separation effect of TLC of test samples was favorable. The spot color was clear,reproducibility was good,and precision was high. Under the conditions of mobile phase constituted by acetonitrile-water-glacial acetic acid-triethylamine( 28∶ 70∶ 1∶ 1),detection wavelength of 265 nm,flow rate of 1. 0 m L min^(-1)and column temperature of 35℃,the resolution of berberine hydrochloride was good; the injection volume in the range of 3. 15-50 μg· m L^(-1)had good linear relationship with the peak area( R^2= 0. 998); the average sample recovery rate(n=6) was 5. 672%,and RSD was 0. 864%; the content of berberine hydrochloride contained in Jin Weng Zhili Particle was 4. 023 mg. [Conclusions]The method was of good feasibility,reproducibility and specificity,and could be used for qualitative and quantitative detection of berberine hydrochloride contained in Jin Weng Zhili Particle.展开更多
1 Introduction Studies of marine sedimentary phosphate rock have lasted decades,scholars proposed some standpoints about mineralization,however,the genesis of mineral deposits remains to be a controversial question(Sh...1 Introduction Studies of marine sedimentary phosphate rock have lasted decades,scholars proposed some standpoints about mineralization,however,the genesis of mineral deposits remains to be a controversial question(She et al.,2013).There are many viewpoints of mineralization about the Doushantuo phosphorites,Central Guizhou,including biological mineralization(Mi et al.,2010;Shi et al.,2005),展开更多
文摘There are many important ancient buildings left in Bofang Village with a long history.The Xianweng Temple located in the north of the village is the only Taoist building in the ancient building group of Bofang Village.Its historical origin can be traced back to Tang and Song dynasties.The temple is a collection of gardens,buildings,painted in one place,all aspects of the achievement is quite high.Through the study of the decorative art characteristics of Xien-weng Temple in Bofang Village,Gaoping,this paper summarizes the artistic characteristics of Taoist architectural decoration in Shanxi,excavates the great value of its existence,and inspires more people to reflect on the protection of ancient buildings.
基金funded by the National Natural Science Foundation of China(Grant No.440272015)the China Geological Survey(Grant No.200213000042).
文摘Abundant phosphatized acritarchs are preserved in the late Precambrian （Ediacaran） Doushantuo Formation at Weng＇an, Guizhou Province, southwest China. Most of them are large with various spinous ornaments and multilayered outer walls. The general characters of these fossils are quite similar to those found from the homochronous deposits of the Yangtze Gorges, southern China. Therefore the Doushantuo Formation in the Weng＇an area can be correlated directly with the Doushantuo Formation of the Yangtze Gorges. Four species in four genera, including two new genera, two new species and one uncertain species are systematically described for the first time from the studied locality. The taxa are Bacatisphaera baokangensis Zhou, Brasier et Xue, 2001, Taeniosphaera doushantuoensis gen. et sp. nov., Rugospinasphaera speciosa gen. et sp. nov. and Meghystichosphaeridium sp. The new data enriches the famous Weng＇an biota, especially the marine microplankton flora in the Ediacaran Doushantuo Formation.
基金financial support from the National Natural Science Foundation of China (Grant Nos. 71303258, 71373285, and 71503264)National Social Science Funds of China (13&ZD159)+1 种基金MOE (Ministry of Education in China) Project of Humanities and Social Sciences (13YJC630148, 15YJC630121)Science Foundation of China University of Petroleum, Beijing (ZX20150130)
文摘Low oil prices under the influence of economic structure transformation and slow economic growth have hit the existing markets of traditional big oil suppliers and upgraded the conflict of oil production capacity and interest between OPEC producers and other big oil supplier countries such as the USA and Russia. Forecasting global oil production is significant for all countries for energy strategy planning, although many past forecasts have later been proved to be very seriously incorrect. In this paper,the original generalized Weng model is expanded to a multi-cycle generalized Weng model to better reflect the multi-cycle phenomena caused by political, economic and technological factors. This is used to forecast global oil production based on parameter selection from a large sample, depletion rate of remaining resources, constraints on oil reserves and cycle number determination. This research suggests that the world will reach its peak oil production in 2022, at about 4340×10~6 tonnes. China needs to plan for oil import diversity, a domestic oil production structure based on the supply pattern of large oil suppliers worldwide and the oil demand for China＇s own development.
基金Supported by Special Project of National Public Benefit Industry(Agriculture)(201303040-05)Special Project of Science and Technology Groundwork(2013-FY110600-03)
文摘[Objectives]To screen optimum conditions of HPLC and TLC for qualitative discrimination of berberine hydrochloride contained in Jin Weng Zhili Particle,thus providing basis for quality standard. [Methods]According to the method described in Chinese Veterinary Pharmacopoeia,thin layer chromatography and high performance liquid chromatography were used respectively for qualitative and quantitative identification of berberine hydrochloride contained in Jin Weng Zhili Particle by improving the conditions of extraction and purification. [Results]After optimizing TLC conditions of Jin Weng Zhili Particle,the separation effect of TLC of test samples was favorable. The spot color was clear,reproducibility was good,and precision was high. Under the conditions of mobile phase constituted by acetonitrile-water-glacial acetic acid-triethylamine( 28∶ 70∶ 1∶ 1),detection wavelength of 265 nm,flow rate of 1. 0 m L min^(-1)and column temperature of 35℃,the resolution of berberine hydrochloride was good; the injection volume in the range of 3. 15-50 μg· m L^(-1)had good linear relationship with the peak area( R^2= 0. 998); the average sample recovery rate(n=6) was 5. 672%,and RSD was 0. 864%; the content of berberine hydrochloride contained in Jin Weng Zhili Particle was 4. 023 mg. [Conclusions]The method was of good feasibility,reproducibility and specificity,and could be used for qualitative and quantitative detection of berberine hydrochloride contained in Jin Weng Zhili Particle.
文摘1 Introduction Studies of marine sedimentary phosphate rock have lasted decades,scholars proposed some standpoints about mineralization,however,the genesis of mineral deposits remains to be a controversial question(She et al.,2013).There are many viewpoints of mineralization about the Doushantuo phosphorites,Central Guizhou,including biological mineralization(Mi et al.,2010;Shi et al.,2005),
