The flourishing development of Internet brings profound and lasting influences on the young students’growth.We use the complex network to analyze the characteristics of the information dissemination on Internet.We ta...The flourishing development of Internet brings profound and lasting influences on the young students’growth.We use the complex network to analyze the characteristics of the information dissemination on Internet.We take the new requires for the educators,which occurred because of the students’pluralities,possibilities,playfulness and participation under the influence of Internet technology.We use the Markov chain theory to describe the transfer relationship among the four states including trust,agreement,participation,development of the college politics education patterns in the Internet Plus mode.In addition,we use hierarchical structure to calculate and offer suggestions for the distribution of the educators’work.We suggest five strategies including the conversational cooperation strategy,the service driven strategy,the O2O marketing strategy,the game participation strategy and the digital operation strategy.Then we perform the AHP method to find the best strategy.展开更多
Nitrate is a crucial environmental pollutant,and its risk on ecosystem keeps increasing.Photocatalytic conversion of nitrate to ammonia can simultaneously achieve the commercialization of environmental hazards and rec...Nitrate is a crucial environmental pollutant,and its risk on ecosystem keeps increasing.Photocatalytic conversion of nitrate to ammonia can simultaneously achieve the commercialization of environmental hazards and recovery of valuable ammonia,which is green and sustainable for the planet.However,due to the thermodynamic and kinetic energy barriers,photocatalytic nitrate reduction usually involves a higher selectivity of the formation of nitrogen that largely limits the ammonia synthesis activity.In this work,we reported a green and facile synthesis of novel metallic ruthenium particle modified graphitic carbon nitride photocatalysts.Compare with bulk graphitic carbon nitride,the optimal sample had 2.93-fold photocatalytic nitrate reduction to ammonia activity(2.627 mg/h/gcat),and the NH3 selectivity increased from 50.77%to 77.9%.According to the experimental and calculated results,the enhanced photocatalytic performance is attributed to the stronger light absorption,nitrate adsorption,and lower energy barrier for the generation of ammonia.This work may provide a facile way to prepare metal modified photocatalysts to achieve highly efficient nitrate reduction to ammonia.展开更多
The ribosome-binding site(RBS)in the 5′untranslated region is recognized by 16S rRNA to start translation and is an essential element of the gene expression system.RBSs have been widely applied in regulating gene exp...The ribosome-binding site(RBS)in the 5′untranslated region is recognized by 16S rRNA to start translation and is an essential element of the gene expression system.RBSs have been widely applied in regulating gene expression in various scenarios,including Gram-negative or Gram-positive bacteria.Here,we first rationally designed and constructed an RBS mutant library containing 66 RBSs.The strength of these RBSs in E.coli and C.glutamicum was characterized individually.The RBS strength spanned about 200 and 15 times in the two species,respectively.The strength of RBSs in C.glutamicum was generally lower than that of in E.coli.A total of 18 RBSs showed similar strength(within twofold differences)between the species in our study,and the correlation analysis of the strength of RBSs between E.coli and C.glutamicum(R^(2)=0.7483)revealed that these RBSs can be used across species.The sequence analysis revealed that the RBS region with two Ts stated was beneficial for RBS to function cross-species.The RBS characterized here can be used to precisely regulate gene expression in both hosts,and the characteristics of cross-species RBSs provide basic information for RBS rational design.展开更多
文摘The flourishing development of Internet brings profound and lasting influences on the young students’growth.We use the complex network to analyze the characteristics of the information dissemination on Internet.We take the new requires for the educators,which occurred because of the students’pluralities,possibilities,playfulness and participation under the influence of Internet technology.We use the Markov chain theory to describe the transfer relationship among the four states including trust,agreement,participation,development of the college politics education patterns in the Internet Plus mode.In addition,we use hierarchical structure to calculate and offer suggestions for the distribution of the educators’work.We suggest five strategies including the conversational cooperation strategy,the service driven strategy,the O2O marketing strategy,the game participation strategy and the digital operation strategy.Then we perform the AHP method to find the best strategy.
基金an Australian Research Council(ARC)Future Fellowship(FT160100195)the National Key Research and Development Program of China(2016YFA0602900)+4 种基金the National Natural Science Foundation of China(21673220)Department of Science and Technology of Sichuan Province(2017GZ0051)Jilin Province Science and Technology Development Program(20190201270JC,20180101030JC)Part of the computational time is supported by the High Performance Computing Center of Jilin University and Jilin Province,as well as Network and Computing Center of Changchun Institute of Applied ChemistryDerek Hao acknowledges the technical support of Beijing NBET Technology Co.,Ltd.The authors also acknowledge the Sydney Analytical(USYD),CTWW,MAU,and Chem Lab of UTS for the lab supports.
文摘Nitrate is a crucial environmental pollutant,and its risk on ecosystem keeps increasing.Photocatalytic conversion of nitrate to ammonia can simultaneously achieve the commercialization of environmental hazards and recovery of valuable ammonia,which is green and sustainable for the planet.However,due to the thermodynamic and kinetic energy barriers,photocatalytic nitrate reduction usually involves a higher selectivity of the formation of nitrogen that largely limits the ammonia synthesis activity.In this work,we reported a green and facile synthesis of novel metallic ruthenium particle modified graphitic carbon nitride photocatalysts.Compare with bulk graphitic carbon nitride,the optimal sample had 2.93-fold photocatalytic nitrate reduction to ammonia activity(2.627 mg/h/gcat),and the NH3 selectivity increased from 50.77%to 77.9%.According to the experimental and calculated results,the enhanced photocatalytic performance is attributed to the stronger light absorption,nitrate adsorption,and lower energy barrier for the generation of ammonia.This work may provide a facile way to prepare metal modified photocatalysts to achieve highly efficient nitrate reduction to ammonia.
基金This work was financially supported by the National Key Research and Development Program of China(2018YFA0900300)the National Natural science foundation of China(32171421).
文摘The ribosome-binding site(RBS)in the 5′untranslated region is recognized by 16S rRNA to start translation and is an essential element of the gene expression system.RBSs have been widely applied in regulating gene expression in various scenarios,including Gram-negative or Gram-positive bacteria.Here,we first rationally designed and constructed an RBS mutant library containing 66 RBSs.The strength of these RBSs in E.coli and C.glutamicum was characterized individually.The RBS strength spanned about 200 and 15 times in the two species,respectively.The strength of RBSs in C.glutamicum was generally lower than that of in E.coli.A total of 18 RBSs showed similar strength(within twofold differences)between the species in our study,and the correlation analysis of the strength of RBSs between E.coli and C.glutamicum(R^(2)=0.7483)revealed that these RBSs can be used across species.The sequence analysis revealed that the RBS region with two Ts stated was beneficial for RBS to function cross-species.The RBS characterized here can be used to precisely regulate gene expression in both hosts,and the characteristics of cross-species RBSs provide basic information for RBS rational design.
