Ammonia detection possesses great potential in atmosphere environmental protection,agriculture,industry,and rapid medical diagnosis.However,it still remains a great challenge to balance the sensitivity,selectivity,wor...Ammonia detection possesses great potential in atmosphere environmental protection,agriculture,industry,and rapid medical diagnosis.However,it still remains a great challenge to balance the sensitivity,selectivity,working temperature,and response/recovery speed.In this work,Berlin green(BG)framework is demonstrated as a highly promising sensing material for ammonia detection by both density functional theory simulation and experimental gas sensing investigation.Vacancy in BG framework offers abundant active sites for ammonia absorption,and the absorbed ammonia transfers sufficient electron to BG,arousing remarkable enhancement of resistance.Pristine BG framework shows remarkable response to ammonia at 50–110°C with the highest response at 80°C,which is jointly influenced by ammonia’s absorption onto BG surface and insertion into BG lattice.The sensing performance of BG can hardly be achieved at room temperature due to its high resistance.Introduction of conductive Ti3CN MXene overcomes the high resistance of pure BG framework,and the simply prepared BG/Ti3CN mixture shows high selectivity to ammonia at room temperature with satisfying response/recovery speed.展开更多
Aqueous rechargeable metal-ion batteries(ARMBs)hold intrinsic advantages of high safety,low cost and environmental benignity for large scale energy storage technologies.However,the research on aqueous Kion batteries(A...Aqueous rechargeable metal-ion batteries(ARMBs)hold intrinsic advantages of high safety,low cost and environmental benignity for large scale energy storage technologies.However,the research on aqueous Kion batteries(AKIBs)was hindered by limited materials.Herein,a novel AKIB was reported by employing environment-friendly 1,4,5,8-naphthalenetetracarboxylic dianhydride-derived polyimide(PNTCDA)as anode and Berlin green(FeHCF)as cathode.Both electrodes have high rate performance and excellent capacity retention during cycling.Kinetics researches verify the superior electrochemical property of PNTCDA in saturated KNO3 solution.In-situ XRD of FeHCF demonstrates the unique shift of peak position and negligible distortion of lattice during the insertion/extraction of K+.The AKIB exhibits an attractive energy density of 46.9 Wh/kg and a high capacity retention of 74%in 300 cycles.More importantly,the battery can reach a super-high power of 2079.1 W/kg with an energy density of 24.2 Wh/kg,ranking relatively high among the ARIMs.This system extends the use of polyimide and points a way of AKIBs for grid-scale energy storage.展开更多
To celebrate the 70^th anniversary of the founding of the People's Republic of China,and to take the opportunity of celebrating the 5^th anniversary of the establishment of comprehensive strategic partnership betw...To celebrate the 70^th anniversary of the founding of the People's Republic of China,and to take the opportunity of celebrating the 5^th anniversary of the establishment of comprehensive strategic partnership between China and Germany and the 25^th founding anniversary of Beijing-Berlin Sister-City Ties,China Cultural Center in Berlin sponsored a series of events around the National Day.展开更多
From September 28 to October 5,2020,China Cultural Center(CCC)in Berlin had 6 thematic cultural events synchronously online at its official website,WeChat official account as well as YouTube,Facebook and other oversea...From September 28 to October 5,2020,China Cultural Center(CCC)in Berlin had 6 thematic cultural events synchronously online at its official website,WeChat official account as well as YouTube,Facebook and other overseas social media accounts.展开更多
Diippel Museum Village is an internationally qualified archaeological center that is experimental in nature.It is committed to studying the construction techniques of medieval villages and people’s lifestyle and expl...Diippel Museum Village is an internationally qualified archaeological center that is experimental in nature.It is committed to studying the construction techniques of medieval villages and people’s lifestyle and exploring simple ways to tell the public about the research results.展开更多
The regularities of the dynamics of the average annual temperature of Berlin from 1701 to 2021 are revealed.A total of 65 wavelets were received.The temperature has a high quantum certainty,and the change in the...The regularities of the dynamics of the average annual temperature of Berlin from 1701 to 2021 are revealed.A total of 65 wavelets were received.The temperature has a high quantum certainty,and the change in the average annual temperature of Berlin was identified by a model that contains only two components for prediction.The basis of the forecast at 320 years makes it possible to look into the future until the year 2340.The forecast confirms the conclusions made in the CMIP5 report on global warming.With an increase in the number of components in the model up to five,the forecast is possible only until 2060.Therefore,the model with only two components is workable.The trend is characterized by a modified Mandelbrot equation showing exponential growth with a high growth rate of 1.47421.The wave equation also has an amplitude in the form of the Mandelbrot law(in mathematics,the Laplace law,in biology,the Zipf-Pearl law,in econometrics,the Pareto law),when the exponential growth activity is equal to 1.For 1701,the period of oscillation was 2×60.33333≈120.7 years.By 2021,the period decreased and became equal to 87.6 years.The trend is such that by 2340 the period of oscillation will decrease to 30.2 years.Such an increase in fluctuations indicates an imbalance in climate disturbances in temperature in Berlin.For Berlin,the last three years are characterized by sharp decreases in the average annual temperature from 11.8℃ to 10.5℃,i.e.by 12.4% in 2021.Therefore,the forecast is still unstable,as a further decrease in the average annual temperature of Berlin in the near future may change the picture of the forecast.展开更多
(Chinesesische und manjurische Handschriften und seltene Drücke 7),Stuttgart:Franz Steiner Verlag,2014,448 pp.2014年出版的西脇常記《柏林吐魯番收集品中的漢文印本目録》(Chinesische Blockdrucke aus der Berliner Turf...(Chinesesische und manjurische Handschriften und seltene Drücke 7),Stuttgart:Franz Steiner Verlag,2014,448 pp.2014年出版的西脇常記《柏林吐魯番收集品中的漢文印本目録》(Chinesische Blockdrucke aus der Berliner Turfansammlung)一書,是作爲《德國東方寫本目録叢刊》(Verzeichnis der Orientalischen Handschriften in Deutschland)的第12卷《漢文與滿文寫本與印本》(Chinesesische und manjurische Handschriften und seltene Drucke)第7分册而出版的。此前2002年出版了西脇常記《柏林吐魯番收集品中的漢文文獻目録》^([1]),2005年出版了百濟康義《柏林藏吐魯番收集品中的漢文佛教文獻目録》第3卷^([2])。展开更多
LAST December,the science journal Blood published a paper claiming a cure for HIV had been found.While the announcement breathes new life into the AIDS research community,it’s not without caveats. The paper’s author...LAST December,the science journal Blood published a paper claiming a cure for HIV had been found.While the announcement breathes new life into the AIDS research community,it’s not without caveats. The paper’s authors’ evidence came in the form of a 44-year-old man referred to as "The Berlin Patient." An American living in Germany,the man,whose real name is Timothy Ray Brown, was diagnosed with HIV around age 30.He spent a decade following a traditional drug regimen for the disease with success; he was healthy and had a high T-cell count.Then,in 2006, Brown was diagnosed with acute leukemia.His doctor,Gero H(u|¨)tter,decided to use the cancer as an opportunity to also rid Brown of his HIV.展开更多
Dawa Tsering,the scholar from China Tii betolgy Research Center,is answering visitors' questions in UTS,Sydney.Photo by Degyi Students from UTS in Sydney visiting the show.Photo by Degyi The German public loved th...Dawa Tsering,the scholar from China Tii betolgy Research Center,is answering visitors' questions in UTS,Sydney.Photo by Degyi Students from UTS in Sydney visiting the show.Photo by Degyi The German public loved these Tibetan books.Photo by Lu Ying The visitors In Berlin.Photo by Lu展开更多
In this study,we report that Berlin Green(FeFe-BG)framework exhibits superior performance in the catalytic coupling of carbon disulfide(CS_(2))and propylene oxide(PO)to generate a random copolymer containing thioether...In this study,we report that Berlin Green(FeFe-BG)framework exhibits superior performance in the catalytic coupling of carbon disulfide(CS_(2))and propylene oxide(PO)to generate a random copolymer containing thioether,propylene monothiocarbonate and ether units.Oxygen and sulfur atom exchange was detected in polymeric and cyclic thiocarbonate byproducts and utilized to modulate the copolymerization of CS_(2)and propylene oxide.The coupling of PO and CS_(2)was selective for copolymer formation under various reaction conditions.^(1)H and^(13)C NMR spectroscopy determined two distinct polymer linkages and two cyclic byproducts.Copolymer number average molecular weights ranged from 6.4 kg/mol to 10.5 kg/mol,with a comparatively low polydispersity of 1.3-1.7.The CS_(2)/PO molar feed ratio had a significant impact on the O/S exchange process;the ratio of cyclic thiocarbonate byproducts could be efficiently regulated by tuning the CS_(2)molar feed ratio.展开更多
The German Government has developed a China strategy which,on the one hand,intends to determine the bilateral political and economic relationship in concrete terms.On the other hand,this strategy emphasizes common gro...The German Government has developed a China strategy which,on the one hand,intends to determine the bilateral political and economic relationship in concrete terms.On the other hand,this strategy emphasizes common ground within the framework of the coordinated EU-China policy.展开更多
基金The research was supported by the National Natural Science Foundation of China(Grant Nos.61435010,61675135,and 62005177)the National Natural Science Foundation for Young Scientists of China(Grant No.61905161)the Science and Technology Innovation Commission of Shenzhen(JCYJ20190808142415003).Authors also acknowledge the support from Instrumental Analysis Center of Shenzhen University(Xili Campus).
文摘Ammonia detection possesses great potential in atmosphere environmental protection,agriculture,industry,and rapid medical diagnosis.However,it still remains a great challenge to balance the sensitivity,selectivity,working temperature,and response/recovery speed.In this work,Berlin green(BG)framework is demonstrated as a highly promising sensing material for ammonia detection by both density functional theory simulation and experimental gas sensing investigation.Vacancy in BG framework offers abundant active sites for ammonia absorption,and the absorbed ammonia transfers sufficient electron to BG,arousing remarkable enhancement of resistance.Pristine BG framework shows remarkable response to ammonia at 50–110°C with the highest response at 80°C,which is jointly influenced by ammonia’s absorption onto BG surface and insertion into BG lattice.The sensing performance of BG can hardly be achieved at room temperature due to its high resistance.Introduction of conductive Ti3CN MXene overcomes the high resistance of pure BG framework,and the simply prepared BG/Ti3CN mixture shows high selectivity to ammonia at room temperature with satisfying response/recovery speed.
文摘Aqueous rechargeable metal-ion batteries(ARMBs)hold intrinsic advantages of high safety,low cost and environmental benignity for large scale energy storage technologies.However,the research on aqueous Kion batteries(AKIBs)was hindered by limited materials.Herein,a novel AKIB was reported by employing environment-friendly 1,4,5,8-naphthalenetetracarboxylic dianhydride-derived polyimide(PNTCDA)as anode and Berlin green(FeHCF)as cathode.Both electrodes have high rate performance and excellent capacity retention during cycling.Kinetics researches verify the superior electrochemical property of PNTCDA in saturated KNO3 solution.In-situ XRD of FeHCF demonstrates the unique shift of peak position and negligible distortion of lattice during the insertion/extraction of K+.The AKIB exhibits an attractive energy density of 46.9 Wh/kg and a high capacity retention of 74%in 300 cycles.More importantly,the battery can reach a super-high power of 2079.1 W/kg with an energy density of 24.2 Wh/kg,ranking relatively high among the ARIMs.This system extends the use of polyimide and points a way of AKIBs for grid-scale energy storage.
文摘To celebrate the 70^th anniversary of the founding of the People's Republic of China,and to take the opportunity of celebrating the 5^th anniversary of the establishment of comprehensive strategic partnership between China and Germany and the 25^th founding anniversary of Beijing-Berlin Sister-City Ties,China Cultural Center in Berlin sponsored a series of events around the National Day.
文摘From September 28 to October 5,2020,China Cultural Center(CCC)in Berlin had 6 thematic cultural events synchronously online at its official website,WeChat official account as well as YouTube,Facebook and other overseas social media accounts.
文摘Diippel Museum Village is an internationally qualified archaeological center that is experimental in nature.It is committed to studying the construction techniques of medieval villages and people’s lifestyle and exploring simple ways to tell the public about the research results.
文摘The regularities of the dynamics of the average annual temperature of Berlin from 1701 to 2021 are revealed.A total of 65 wavelets were received.The temperature has a high quantum certainty,and the change in the average annual temperature of Berlin was identified by a model that contains only two components for prediction.The basis of the forecast at 320 years makes it possible to look into the future until the year 2340.The forecast confirms the conclusions made in the CMIP5 report on global warming.With an increase in the number of components in the model up to five,the forecast is possible only until 2060.Therefore,the model with only two components is workable.The trend is characterized by a modified Mandelbrot equation showing exponential growth with a high growth rate of 1.47421.The wave equation also has an amplitude in the form of the Mandelbrot law(in mathematics,the Laplace law,in biology,the Zipf-Pearl law,in econometrics,the Pareto law),when the exponential growth activity is equal to 1.For 1701,the period of oscillation was 2×60.33333≈120.7 years.By 2021,the period decreased and became equal to 87.6 years.The trend is such that by 2340 the period of oscillation will decrease to 30.2 years.Such an increase in fluctuations indicates an imbalance in climate disturbances in temperature in Berlin.For Berlin,the last three years are characterized by sharp decreases in the average annual temperature from 11.8℃ to 10.5℃,i.e.by 12.4% in 2021.Therefore,the forecast is still unstable,as a further decrease in the average annual temperature of Berlin in the near future may change the picture of the forecast.
文摘(Chinesesische und manjurische Handschriften und seltene Drücke 7),Stuttgart:Franz Steiner Verlag,2014,448 pp.2014年出版的西脇常記《柏林吐魯番收集品中的漢文印本目録》(Chinesische Blockdrucke aus der Berliner Turfansammlung)一書,是作爲《德國東方寫本目録叢刊》(Verzeichnis der Orientalischen Handschriften in Deutschland)的第12卷《漢文與滿文寫本與印本》(Chinesesische und manjurische Handschriften und seltene Drucke)第7分册而出版的。此前2002年出版了西脇常記《柏林吐魯番收集品中的漢文文獻目録》^([1]),2005年出版了百濟康義《柏林藏吐魯番收集品中的漢文佛教文獻目録》第3卷^([2])。
文摘LAST December,the science journal Blood published a paper claiming a cure for HIV had been found.While the announcement breathes new life into the AIDS research community,it’s not without caveats. The paper’s authors’ evidence came in the form of a 44-year-old man referred to as "The Berlin Patient." An American living in Germany,the man,whose real name is Timothy Ray Brown, was diagnosed with HIV around age 30.He spent a decade following a traditional drug regimen for the disease with success; he was healthy and had a high T-cell count.Then,in 2006, Brown was diagnosed with acute leukemia.His doctor,Gero H(u|¨)tter,decided to use the cancer as an opportunity to also rid Brown of his HIV.
文摘Dawa Tsering,the scholar from China Tii betolgy Research Center,is answering visitors' questions in UTS,Sydney.Photo by Degyi Students from UTS in Sydney visiting the show.Photo by Degyi The German public loved these Tibetan books.Photo by Lu Ying The visitors In Berlin.Photo by Lu
基金This work was supported by the National Natural Science Foundation of China(No.51973190)the Fund of Zhejiang Provincial Department of Science and Technology,China(Nos.2020R52006,2022C01216)the Fund of Shanxi-Zheda Institute of Advanced Materials and Chemical Engineering,China(No.2021SZ-TD003).
文摘In this study,we report that Berlin Green(FeFe-BG)framework exhibits superior performance in the catalytic coupling of carbon disulfide(CS_(2))and propylene oxide(PO)to generate a random copolymer containing thioether,propylene monothiocarbonate and ether units.Oxygen and sulfur atom exchange was detected in polymeric and cyclic thiocarbonate byproducts and utilized to modulate the copolymerization of CS_(2)and propylene oxide.The coupling of PO and CS_(2)was selective for copolymer formation under various reaction conditions.^(1)H and^(13)C NMR spectroscopy determined two distinct polymer linkages and two cyclic byproducts.Copolymer number average molecular weights ranged from 6.4 kg/mol to 10.5 kg/mol,with a comparatively low polydispersity of 1.3-1.7.The CS_(2)/PO molar feed ratio had a significant impact on the O/S exchange process;the ratio of cyclic thiocarbonate byproducts could be efficiently regulated by tuning the CS_(2)molar feed ratio.
文摘The German Government has developed a China strategy which,on the one hand,intends to determine the bilateral political and economic relationship in concrete terms.On the other hand,this strategy emphasizes common ground within the framework of the coordinated EU-China policy.
