Using ab initio density functional theory calculations, we explore the three most stable structural phases, namely, α,β, and cubic(c) phases, of two-dimensional(2D) antimonene, as well as its isoelectronic counterpa...Using ab initio density functional theory calculations, we explore the three most stable structural phases, namely, α,β, and cubic(c) phases, of two-dimensional(2D) antimonene, as well as its isoelectronic counterparts SnTe and InI. We find that the band gap increases monotonically from Sb to SnTe to InI along with an increase in ionicity, independent of the structural phases. The band gaps of this material family cover the entire visible-light energy spectrum, ranging from 0.26 eV to 3.37 eV, rendering them promising candidates for optoelectronic applications. Meanwhile, band-edge positions of these materials are explored and all three types of band alignments can be achieved through properly combining antimonene with its isoelectronic counterparts to form heterostructures. The richness in electronic properties for this isoelectronic material family sheds light on possibilities to tailor the fundamental band gap of antimonene via lateral alloying or forming vertical heterostructures.展开更多
LIGO/Virgo S190814 bv is the first high-probability neutron star–black hole(NSBH)merger candidate,whose gravitational waves(GWs)triggered LIGO/Virgo detectors at21:10:39.012957 UT,14 August 2019.It has a probability&...LIGO/Virgo S190814 bv is the first high-probability neutron star–black hole(NSBH)merger candidate,whose gravitational waves(GWs)triggered LIGO/Virgo detectors at21:10:39.012957 UT,14 August 2019.It has a probability>99%of being an NSBH merger,with a low false alarm rate(FAR)of one per 1.559 e+25 years.For an NSBH merger,electromagnetic counterparts(especially short gamma-ray bursts(GRBs))are generally expected.However,no electromagnetic counterpart has been found in the extensive follow-up observing campaign.In the present work,we propose a novel explanation for this null result.In our scenario,LIGO/Virgo S190814 bv is just a GW mirror image of the real NSBH merger which should have been detected before 14 September 2015,but at that time we had no ability to detect its GW signals.The electromagnetic counterparts associated with the real NSBH merger should be found in the archive data before 14 September 2015.In this work,we indeed find nine short GRBs that are possibly electromagnetic counterparts.展开更多
Interprovincial counterpart support is a cooperative system used by local governments to achieve horizontal flow of resources based on cross-regional cooperation.Existing research has mainly focused on governance ef‐...Interprovincial counterpart support is a cooperative system used by local governments to achieve horizontal flow of resources based on cross-regional cooperation.Existing research has mainly focused on governance ef‐ficiency,institutional advantages,and ranking incentives while ignoring the scrambling behavior and opera‐tional mechanisms of local governments formed by ranking incentives and territorial responsibilities.This study selected the Wenchuan earthquake,Yushu earthquake,and COVID-19 as three typical cases.We con‐structed a theoretical framework for competition among provincial local governments and found that competi‐tion in interprovincial disaster counterpart support followed a dual behavioral logic of“striving to be first”and“fear of being last”.Specifically,local governments will choose striving to be first under the logic of time coercion,content games,and territorial responsibility;they will choose fear of being last under the logic of re‐sponsibility avoidance and moral pressure.This type of scrambling-based horizontal competition reflects the logic of local government competition tournaments.This study further revealed the specific processes,mecha‐nisms,and results of horizontal local government competition,which can provide inspiration for cross regional and provincial cooperation.展开更多
In the blood fluke Schistosoma mansoni a functionally active, monomeric, phospholipid hydroperoxide glutathione peroxidase (PHGPx) has been purified and characterized. This enzyme contains a catalytically active selen...In the blood fluke Schistosoma mansoni a functionally active, monomeric, phospholipid hydroperoxide glutathione peroxidase (PHGPx) has been purified and characterized. This enzyme contains a catalytically active selenocysteine. The protein has been shown to be the product of a cloned gene, previously referred to as a glutathione peroxidase gene. S. mansoni PHGPx has been found 5 times more abundant in female than in male worm extract. As in vertebrate PHGPx, homology alignment indicates that the residues involved in the glutathione binding by the tetrameric cellular glutathione peroxidase are mutated in the S. mansoni enzyme. Thus, this aspect appears a landmark of the PHGPx-type of glutathione peroxidases,which might be of functional relevance展开更多
In recent years, with museums popularized by various cultural creative products, libraries are unwilling to lag behind. Recently, the National Library Cultural and Creative Artwork Store was officially opened. Meanwhi...In recent years, with museums popularized by various cultural creative products, libraries are unwilling to lag behind. Recently, the National Library Cultural and Creative Artwork Store was officially opened. Meanwhile, the Flagship Store of the National Library Cultural and Creative Union was launched on Tmall. Led by the National Library of China, 116 libraries across the country have "joined hands" to set up online shops, so as to jointly develop cultural creative products.展开更多
On July 20th, a signing ceremony between Setcore Group, Egypt represented by Mr. Tamer Nassar-Chairman of Group and the World Trade & Commerce Center, Dongyang-China represented by Mr. Jiang Yuejin-Mayor of Dongya...On July 20th, a signing ceremony between Setcore Group, Egypt represented by Mr. Tamer Nassar-Chairman of Group and the World Trade & Commerce Center, Dongyang-China represented by Mr. Jiang Yuejin-Mayor of Dongyang City was held at the Marriott Hotel in Zamalek-Cairo. This was win-win cooperation and exerted great significances on both sides. In this event, they exchange ideas on the economic issues of common concerned and signed a memorandum of understanding as well.展开更多
People doing business in China should try to know how to address their Chinese counter-parts, especially in formal settings so as to better engage with them. Different cultures mean people are addressed differently.
Lung squamous cell carcinoma （LUSC） causes approximately 400 000 deaths each year worldwide. The occurrence of LUSC is attributed to exposure to cigarette smoke, which induces the development of numerous genomic abn...Lung squamous cell carcinoma （LUSC） causes approximately 400 000 deaths each year worldwide. The occurrence of LUSC is attributed to exposure to cigarette smoke, which induces the development of numerous genomic abnormalities. However, few studies have investigated the genomic variations that occur only in normal tissues that have been similarly exposed to tobacco smoke as tumor tissues. In this study, we sequenced the whole genomes of three normal lung tissue samples and their paired adjacent squamous cell carcinomas. We then called genomic variations specific to the normal lung tissues through filtering the genomic sequence of the normal lung tissues against that of the paired tumors, the reference human genome, the dbSNP138 common germline variants, and the variations derived from sequencing artifacts. To expand these observations, the whole exome sequences of 478 counterpart normal controls （CNCs） and paired LUSCs of The Cancer Genome Atlas （TCGA） dataset were analyzed. Sixteen genomic variations were called in the three normal lung tissues. These variations were confirmed by Sanger capillary sequencing. A mean of 0.5661 exonic variations/Mb and 7.7887 altered genes per sample were identified in the CNC genome sequences of TCGA. In these CNCs, C：G→T：A transitions, which are the genomic signatures of tobacco carcinogen N-methyl-N-nitro-N-nitrosoguanidine, were the predominant nucleotide changes. Twenty five genes in CNCs had a variation rate that exceeded 2%, including ARSD （18.62%）, MUC4 （8.79%）, and RBMX（7.11%）. CNC variations in CTAGE5 and USP17L7were associated with the poor prognosis of patients with LUSC. Our results uncovered previously unreported genomic variations in CNCs, rather than LUSCs, that may be involved in the develooment of LUSC.展开更多
The initial single pion emission （ISPE） mechanism is applied to the processes r（5S）→πB（＊）B-（＊）, whose details have been recently reported at ICHEP2012, and we obtain reasonable agreement with Bell＇s measu...The initial single pion emission （ISPE） mechanism is applied to the processes r（5S）→πB（＊）B-（＊）, whose details have been recently reported at ICHEP2012, and we obtain reasonable agreement with Bell＇s measurements; that is, we succeed in reproducing the enhancement structures of Zb（10610） and Zb（10650）. Inspired by this success, we also predict the corresponding enhancement structures in open charm oue-pion decays of higher charmonia near the thresholds of D＊D- and D＊D-＊.展开更多
In British Council-managed ELT projects in Chinese universities,Chinese project counterparts areselected from among the English-language teaching staff of the University.They work alongside aBritish Council-recruited ...In British Council-managed ELT projects in Chinese universities,Chinese project counterparts areselected from among the English-language teaching staff of the University.They work alongside aBritish Council-recruited lecturer(BCL)in developing whatever it is the project has been set up tocreate:a syllabus,teaching materials,a course,etc.During the lifetime of the project eachcounterpart is sent for a year’s postgraduate training(typically an MA in applied Linguistics)at aBritish university,the rationale being that the combination of training on the job and in the UK willequip them to take over the running of the project and ensure its long-term sustainability.This paperlooks at the staff development of the counterparts prior to their UK training.展开更多
On May 11,the 3rd Forum of Governors from China and Japan—co-hosted by the CPAFFC,the China-Japan Friendship Association and the Japanese National Governors Association—was successfully held in Sapporo,Hokkaido,Japa...On May 11,the 3rd Forum of Governors from China and Japan—co-hosted by the CPAFFC,the China-Japan Friendship Association and the Japanese National Governors Association—was successfully held in Sapporo,Hokkaido,Japan.Premier Li Keqiang and Japanese Prime Minister Shinzo Abe attended the opening展开更多
In order to investigate the structure-odor relationship of odoriferous compounds and search for new aroma chemicals, seven acetals of 4-trimethylsilyl-3-cyclohexenone and their carbon counterparts were synthesized by ...In order to investigate the structure-odor relationship of odoriferous compounds and search for new aroma chemicals, seven acetals of 4-trimethylsilyl-3-cyclohexenone and their carbon counterparts were synthesized by Birch reduction of 4-substituted anisoles and then acetalization. Seven acetals of 4-trimethylsilylcyclohexanone and their carbon counterparts were synthesized similarly. Structures of all new compounds were determined by MS, IR and ~1H NMR, and their characteristic odors were evaluated as well. The characteristic odors of the acetals formed by 4-substituted-3-cyclohexenone and 1, 2-diols are fruity and woody. The acetals formed from 1, 3-diols are woody, and formed with 1, 4-diols are very faint in odor. Odors of acetals of 4-substituted cyclohexanone are all very weak. As a whole, odors of organosilicon compounds are weaker, but somewhat more delicate than their carbon counter- parts.展开更多
基金Project supported by the National Natural Science Foundation of China(Grant No.51702146)the College Students’Innovation and Entrepreneurship Projects,China(Grant No.201710148000072)Liaoning Province Doctor Startup Fund,China(Grant No.201601325)。
文摘Using ab initio density functional theory calculations, we explore the three most stable structural phases, namely, α,β, and cubic(c) phases, of two-dimensional(2D) antimonene, as well as its isoelectronic counterparts SnTe and InI. We find that the band gap increases monotonically from Sb to SnTe to InI along with an increase in ionicity, independent of the structural phases. The band gaps of this material family cover the entire visible-light energy spectrum, ranging from 0.26 eV to 3.37 eV, rendering them promising candidates for optoelectronic applications. Meanwhile, band-edge positions of these materials are explored and all three types of band alignments can be achieved through properly combining antimonene with its isoelectronic counterparts to form heterostructures. The richness in electronic properties for this isoelectronic material family sheds light on possibilities to tailor the fundamental band gap of antimonene via lateral alloying or forming vertical heterostructures.
基金supported in part by NSFC under Grants No.11975046 and No.11575022。
文摘LIGO/Virgo S190814 bv is the first high-probability neutron star–black hole(NSBH)merger candidate,whose gravitational waves(GWs)triggered LIGO/Virgo detectors at21:10:39.012957 UT,14 August 2019.It has a probability>99%of being an NSBH merger,with a low false alarm rate(FAR)of one per 1.559 e+25 years.For an NSBH merger,electromagnetic counterparts(especially short gamma-ray bursts(GRBs))are generally expected.However,no electromagnetic counterpart has been found in the extensive follow-up observing campaign.In the present work,we propose a novel explanation for this null result.In our scenario,LIGO/Virgo S190814 bv is just a GW mirror image of the real NSBH merger which should have been detected before 14 September 2015,but at that time we had no ability to detect its GW signals.The electromagnetic counterparts associated with the real NSBH merger should be found in the archive data before 14 September 2015.In this work,we indeed find nine short GRBs that are possibly electromagnetic counterparts.
文摘Interprovincial counterpart support is a cooperative system used by local governments to achieve horizontal flow of resources based on cross-regional cooperation.Existing research has mainly focused on governance ef‐ficiency,institutional advantages,and ranking incentives while ignoring the scrambling behavior and opera‐tional mechanisms of local governments formed by ranking incentives and territorial responsibilities.This study selected the Wenchuan earthquake,Yushu earthquake,and COVID-19 as three typical cases.We con‐structed a theoretical framework for competition among provincial local governments and found that competi‐tion in interprovincial disaster counterpart support followed a dual behavioral logic of“striving to be first”and“fear of being last”.Specifically,local governments will choose striving to be first under the logic of time coercion,content games,and territorial responsibility;they will choose fear of being last under the logic of re‐sponsibility avoidance and moral pressure.This type of scrambling-based horizontal competition reflects the logic of local government competition tournaments.This study further revealed the specific processes,mecha‐nisms,and results of horizontal local government competition,which can provide inspiration for cross regional and provincial cooperation.
文摘In the blood fluke Schistosoma mansoni a functionally active, monomeric, phospholipid hydroperoxide glutathione peroxidase (PHGPx) has been purified and characterized. This enzyme contains a catalytically active selenocysteine. The protein has been shown to be the product of a cloned gene, previously referred to as a glutathione peroxidase gene. S. mansoni PHGPx has been found 5 times more abundant in female than in male worm extract. As in vertebrate PHGPx, homology alignment indicates that the residues involved in the glutathione binding by the tetrameric cellular glutathione peroxidase are mutated in the S. mansoni enzyme. Thus, this aspect appears a landmark of the PHGPx-type of glutathione peroxidases,which might be of functional relevance
文摘In recent years, with museums popularized by various cultural creative products, libraries are unwilling to lag behind. Recently, the National Library Cultural and Creative Artwork Store was officially opened. Meanwhile, the Flagship Store of the National Library Cultural and Creative Union was launched on Tmall. Led by the National Library of China, 116 libraries across the country have "joined hands" to set up online shops, so as to jointly develop cultural creative products.
文摘On July 20th, a signing ceremony between Setcore Group, Egypt represented by Mr. Tamer Nassar-Chairman of Group and the World Trade & Commerce Center, Dongyang-China represented by Mr. Jiang Yuejin-Mayor of Dongyang City was held at the Marriott Hotel in Zamalek-Cairo. This was win-win cooperation and exerted great significances on both sides. In this event, they exchange ideas on the economic issues of common concerned and signed a memorandum of understanding as well.
文摘People doing business in China should try to know how to address their Chinese counter-parts, especially in formal settings so as to better engage with them. Different cultures mean people are addressed differently.
基金This work was supported by the National Natural Science Funds of China for Distinguished Young Scholar （No. 81425025）, the National Key Research and Development Program of China （No. 2016YFC0905500）, the National Natural Science Foundation of China （No. 81672765）, the Strategic Priority Research Program of the Chinese Academy of Sciences （No. XDA 12010307）, and grants from the State Key Laboratory of Membrane Biology. The funders had no role in the design, data collection, and analysis of the study or in the preparation of and the decision to publish the manuscript. The results shown here are partly based on the data generated by The Cancer Genome Atlas, which is managed by the NCI and NHGRI. Information about TCGA can be found at http：//cancergenome.nih. gov. The dbGaP accession number is phs000178.v9.p8.
文摘Lung squamous cell carcinoma （LUSC） causes approximately 400 000 deaths each year worldwide. The occurrence of LUSC is attributed to exposure to cigarette smoke, which induces the development of numerous genomic abnormalities. However, few studies have investigated the genomic variations that occur only in normal tissues that have been similarly exposed to tobacco smoke as tumor tissues. In this study, we sequenced the whole genomes of three normal lung tissue samples and their paired adjacent squamous cell carcinomas. We then called genomic variations specific to the normal lung tissues through filtering the genomic sequence of the normal lung tissues against that of the paired tumors, the reference human genome, the dbSNP138 common germline variants, and the variations derived from sequencing artifacts. To expand these observations, the whole exome sequences of 478 counterpart normal controls （CNCs） and paired LUSCs of The Cancer Genome Atlas （TCGA） dataset were analyzed. Sixteen genomic variations were called in the three normal lung tissues. These variations were confirmed by Sanger capillary sequencing. A mean of 0.5661 exonic variations/Mb and 7.7887 altered genes per sample were identified in the CNC genome sequences of TCGA. In these CNCs, C：G→T：A transitions, which are the genomic signatures of tobacco carcinogen N-methyl-N-nitro-N-nitrosoguanidine, were the predominant nucleotide changes. Twenty five genes in CNCs had a variation rate that exceeded 2%, including ARSD （18.62%）, MUC4 （8.79%）, and RBMX（7.11%）. CNC variations in CTAGE5 and USP17L7were associated with the poor prognosis of patients with LUSC. Our results uncovered previously unreported genomic variations in CNCs, rather than LUSCs, that may be involved in the develooment of LUSC.
基金Supported by National Natural Science Foundation of China(11175073,11005129,11035006)Ministry of Education of China(FANEDD(200924)+2 种基金DPFIHE(20090211120029)NCET(NCET-10-0442)Fundamental Research Funds for Central Universities and West Light Foundation of The Chinese Academy of Sciences
文摘The initial single pion emission （ISPE） mechanism is applied to the processes r（5S）→πB（＊）B-（＊）, whose details have been recently reported at ICHEP2012, and we obtain reasonable agreement with Bell＇s measurements; that is, we succeed in reproducing the enhancement structures of Zb（10610） and Zb（10650）. Inspired by this success, we also predict the corresponding enhancement structures in open charm oue-pion decays of higher charmonia near the thresholds of D＊D- and D＊D-＊.
文摘In British Council-managed ELT projects in Chinese universities,Chinese project counterparts areselected from among the English-language teaching staff of the University.They work alongside aBritish Council-recruited lecturer(BCL)in developing whatever it is the project has been set up tocreate:a syllabus,teaching materials,a course,etc.During the lifetime of the project eachcounterpart is sent for a year’s postgraduate training(typically an MA in applied Linguistics)at aBritish university,the rationale being that the combination of training on the job and in the UK willequip them to take over the running of the project and ensure its long-term sustainability.This paperlooks at the staff development of the counterparts prior to their UK training.
文摘On May 11,the 3rd Forum of Governors from China and Japan—co-hosted by the CPAFFC,the China-Japan Friendship Association and the Japanese National Governors Association—was successfully held in Sapporo,Hokkaido,Japan.Premier Li Keqiang and Japanese Prime Minister Shinzo Abe attended the opening
基金Project supported by NSFCNational Laboratory of Elemento-Organic Chemistry.
文摘In order to investigate the structure-odor relationship of odoriferous compounds and search for new aroma chemicals, seven acetals of 4-trimethylsilyl-3-cyclohexenone and their carbon counterparts were synthesized by Birch reduction of 4-substituted anisoles and then acetalization. Seven acetals of 4-trimethylsilylcyclohexanone and their carbon counterparts were synthesized similarly. Structures of all new compounds were determined by MS, IR and ~1H NMR, and their characteristic odors were evaluated as well. The characteristic odors of the acetals formed by 4-substituted-3-cyclohexenone and 1, 2-diols are fruity and woody. The acetals formed from 1, 3-diols are woody, and formed with 1, 4-diols are very faint in odor. Odors of acetals of 4-substituted cyclohexanone are all very weak. As a whole, odors of organosilicon compounds are weaker, but somewhat more delicate than their carbon counter- parts.
