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《文理导航》 2009年第4X期1-1,共1页
圆明园,这个承载了中国人太多悲情和感伤的地方,由于来自园内的两件文物鼠首、兔首将在法国被拍卖,而再度成为国内舆论关注的焦点。虽然外交部、国家文物局等官方机构已明确表态反对拍卖,但法国佳士得公司依然坚持原有拍卖计划,并最终... 圆明园,这个承载了中国人太多悲情和感伤的地方,由于来自园内的两件文物鼠首、兔首将在法国被拍卖,而再度成为国内舆论关注的焦点。虽然外交部、国家文物局等官方机构已明确表态反对拍卖,但法国佳士得公司依然坚持原有拍卖计划,并最终分别以1400万欧元的高价将圆明园鼠首和兔首铜像拍出。 展开更多
关键词 官方机构 国家文物局 佳士得 AUCTION 《中国日报》 竞拍者 平时常 BRONZE ancie
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Study on Evaluation Method of Ecological Restoration for Soil and Water Conservation in Ningxia Hui Autonomous Region
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作者 Zhang Huwei Zhao Baoping +1 位作者 Ciren Nima Peng Qiong 《Meteorological and Environmental Research》 CAS 2014年第4期38-41,共4页
On the basis of deeply understanding the domestic existing evaluation method of ecological restoration for soil and water conservation, under the premise of analyzing characteristics of current commonly used evaluatio... On the basis of deeply understanding the domestic existing evaluation method of ecological restoration for soil and water conservation, under the premise of analyzing characteristics of current commonly used evaluation index of ecological restoration, based on the actual situation in Ningxia Hui Autonomous Region, taking objectivity, independence and operability as the principles, nine evaluation indexes were selected, and a set of comprehensive evaluation method of ecological restoration for water and soil conservation based on AHP was constructed. The hundred mark system corresponded with ecological restoration level, and the weight of each index in evaluation system was calculated according to comparison matrix constructed by frontline workers of soil and water conservation. The method could be used to determine difficult degree of restoration of the disturbed and destroyed ecosystem and the rationality of ecological restoration for soil and water conservation. 展开更多
关键词 Soil ancI water conservation Ecologicai restoration Analytic hierarchy process Evaluation index China
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两种微生物源谷氨酰胺转氨酶与底物特异性识别的全原子动力学模拟研究
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作者 吴楠 张永峰 季宝成 《原子与分子物理学报》 CAS 北大核心 2023年第5期53-61,共9页
微生物源谷氨酰胺转氨酶(Transglutaminase,TGase)能够催化蛋白间氨酰基转移促进蛋白交联,已经广泛应用于食品、轻工等多种领域.然而目前微生物源TGase与底物间基于长程作用力的分子特异性识别机制仍不清楚,理性改造困难.本研究以源自... 微生物源谷氨酰胺转氨酶(Transglutaminase,TGase)能够催化蛋白间氨酰基转移促进蛋白交联,已经广泛应用于食品、轻工等多种领域.然而目前微生物源TGase与底物间基于长程作用力的分子特异性识别机制仍不清楚,理性改造困难.本研究以源自高茂源链霉菌(MTG)和源自枯草芽孢杆菌(BTG)的两种TGase为研究对象,使用分子对接技术构建酶与底物的结合复合体并使用分子动力学模拟解析两种TGase与底物识别的分子机制.结果显示两种TGase在底物识别过程高度类似,均由催化腔外周loop区域氨基酸残基通过范德华及静电作用固定底物整体,而后由位于催化腔底部催化三联体内Asp(MTG)或Glu(BTG)通过羧基侧链稳定反应发生局部空间构象并拉近底物Gln内γ-酰胺基与核心催化残基Cys间距,以便后续反应过程中TGase-底物中间体的生成.上述结果阐明了TGase与底物活性基团的分子识别模式,提出了两种TGase内作用于底物识别的氨基酸残基,为以后TGase的理性改造研究提供了理论基础. 展开更多
关键词 微生物源谷氨酰胺转氨酶 分子对接 分子动力学模拟 MM/PBSA aNCI分析
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The First Chinese Emperor in Vietnam
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《新华航空》 2011年第8期61-63,66,60,共5页
Vietnam,a close neighbor of China,was influenced by the Chinese Culture for generations.In history,Vietnam had been under the administration and protection of ancient Chinese imperial court for a long period of time.T... Vietnam,a close neighbor of China,was influenced by the Chinese Culture for generations.In history,Vietnam had been under the administration and protection of ancient Chinese imperial court for a long period of time.The first Chinese emperor in Vietnam,who can be traced far back to Qin and Han dynasty,is referred to as the oldest emperor worldwide, His name was Zhao Tuo, 展开更多
关键词 VIETNAM ADMINISTRATION EMPEROR COURT NEIGHBOR anci
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