To the Editor:Human astroviruses(HAstVs)are important etiologic agents of viral gastroenteritis worldwide,[1,2]especially in pediatric patients aged≤5 years.[3]However,reports on HAstV outbreaks in middle schools rem...To the Editor:Human astroviruses(HAstVs)are important etiologic agents of viral gastroenteritis worldwide,[1,2]especially in pediatric patients aged≤5 years.[3]However,reports on HAstV outbreaks in middle schools remain limited.Here,we report a HAstV outbreak in a middle school in China.Clinical and environmental samples tested positive for HAstV,showing a 100%nucleotide identity of the 348-bp region of the capsid protein gene.展开更多
Summary What is known about this topic?H5N6 has replaced H5N1 as a dominant avian influenza virus(AIV)subtype in southern China.The increasing genetic diversity and geographical distribution of H5N6 pose a serious thr...Summary What is known about this topic?H5N6 has replaced H5N1 as a dominant avian influenza virus(AIV)subtype in southern China.The increasing genetic diversity and geographical distribution of H5N6 pose a serious threat to the poultry industry and human health.What is added by this report?A total of 2 cases of H5N6 that occurred from February 2021 to July 2021 in Guangxi.展开更多
Exploring the physiochemical properties and expanding the applications of actinide-containing materials is paramount to address the escalating challenge of radioactive waste accumulation.However,unlocking the full pot...Exploring the physiochemical properties and expanding the applications of actinide-containing materials is paramount to address the escalating challenge of radioactive waste accumulation.However,unlocking the full potential of these materials is largely crippled by the radiotoxicity of the actinides.We report here two porous and luminescent thorium-based metal-organic frameworks(Th-BITD-1 and Th-BITD-2)that serve as a bifunctional platform for sequencing and sensing of radioiodine,a much more radioactive fission product discharged during the nuclear fuel reprocessing.In particular,Th-BITD-1 displays better iodine uptake performance than Th-BITD-2 via the solution-based process and vapor diffusion with the maximum adsorption capacities of 831 and 1099 mg/g,respectively.Fur thermore,Th-BITD-1 can function as a highly sensitive luminescence sensor for iodate with a quenching constant(Ksv)of 6.6(5)×10^(3) M^(-1)and a detection limit of 2.02μM,respectively,outperforming 2.96(6)×10^(3)M^(-1)and 10.5μM of Th-BITD-2.Moreover,a positive correlation between the sensing efficacy and the iodate adsorption capacity has been revealed.This work highlights the opportunity in designing novel actinide-based MOFs for their potential applications in radiological fields,e.g.,radionuclide separation and detection.展开更多
A 47-year-old male(Patient A)passenger from Vietnam whose nucleic acid results for coronavirus disease 2019(COVID-19),also known as severe acute respiratory syndrome coronavirus 2(SARS-CoV-2),were positive at Pingxian...A 47-year-old male(Patient A)passenger from Vietnam whose nucleic acid results for coronavirus disease 2019(COVID-19),also known as severe acute respiratory syndrome coronavirus 2(SARS-CoV-2),were positive at Pingxiang Customs on April 29,2021,and subsequently confirmed by Guangxi CDC laboratories on April 30.展开更多
Luminescent metal-organic frameworks(LMOFs)have been extensively used as sensitive and selective sensors for carcinogenic chromium(VI)oxyanions.However,the correlation between the MOF structure and the Cr(VI)sensing e...Luminescent metal-organic frameworks(LMOFs)have been extensively used as sensitive and selective sensors for carcinogenic chromium(VI)oxyanions.However,the correlation between the MOF structure and the Cr(VI)sensing efficacy remains underexplored,hindering the rational design of MOFs for Cr(VI)sensing.Herein,we overcome this challenge by judiciously selecting the rarely touched thorium cations and a tetraphenylethene-based ligand for building two novel thorium-based MOFs,Th-BCTPE-1 and Th-BCTPE-2.Despite being built from identical precursors,Th-BCTPE-1 shows more sensitive luminescence quenching responses to CrO_(4)^(2-)and Cr_(2)O72-than Th-BCTPE-2,producing the second highest quenching constants of CrO_(4)^(2-)among all LMOF-based Cr(VI)sensors.We further decoupled the influences of different structural variables and the corresponding physiochemical properties,including porosity,BET surface area,photoluminescence quantum yield,and adsorption capacity,showing that the sensing efficacy of Cr(VI)oxyanions is more relevant to the adsorption capacity and the degree of the inner filter effect than the rest of the variables in this system.展开更多
基金supported by a grant from the Young Scientists Found of Guangxi Zhuang Autonomous Region of Medical and Health Care(No.Z2016442).
文摘To the Editor:Human astroviruses(HAstVs)are important etiologic agents of viral gastroenteritis worldwide,[1,2]especially in pediatric patients aged≤5 years.[3]However,reports on HAstV outbreaks in middle schools remain limited.Here,we report a HAstV outbreak in a middle school in China.Clinical and environmental samples tested positive for HAstV,showing a 100%nucleotide identity of the 348-bp region of the capsid protein gene.
基金Supported by the Self-Funded Scientific Research Project of Guangxi Health and Family Planning Commission(Z2015457,Z2016433).
文摘Summary What is known about this topic?H5N6 has replaced H5N1 as a dominant avian influenza virus(AIV)subtype in southern China.The increasing genetic diversity and geographical distribution of H5N6 pose a serious threat to the poultry industry and human health.What is added by this report?A total of 2 cases of H5N6 that occurred from February 2021 to July 2021 in Guangxi.
基金supported by the National Natural Science Foundation of China(22076196,U22B20139,12175024,21906163,22276147,and 22076152).
文摘Exploring the physiochemical properties and expanding the applications of actinide-containing materials is paramount to address the escalating challenge of radioactive waste accumulation.However,unlocking the full potential of these materials is largely crippled by the radiotoxicity of the actinides.We report here two porous and luminescent thorium-based metal-organic frameworks(Th-BITD-1 and Th-BITD-2)that serve as a bifunctional platform for sequencing and sensing of radioiodine,a much more radioactive fission product discharged during the nuclear fuel reprocessing.In particular,Th-BITD-1 displays better iodine uptake performance than Th-BITD-2 via the solution-based process and vapor diffusion with the maximum adsorption capacities of 831 and 1099 mg/g,respectively.Fur thermore,Th-BITD-1 can function as a highly sensitive luminescence sensor for iodate with a quenching constant(Ksv)of 6.6(5)×10^(3) M^(-1)and a detection limit of 2.02μM,respectively,outperforming 2.96(6)×10^(3)M^(-1)and 10.5μM of Th-BITD-2.Moreover,a positive correlation between the sensing efficacy and the iodate adsorption capacity has been revealed.This work highlights the opportunity in designing novel actinide-based MOFs for their potential applications in radiological fields,e.g.,radionuclide separation and detection.
基金Guangxi Key Technologies Research and Development Program(Grant No.AB20149001).
文摘A 47-year-old male(Patient A)passenger from Vietnam whose nucleic acid results for coronavirus disease 2019(COVID-19),also known as severe acute respiratory syndrome coronavirus 2(SARS-CoV-2),were positive at Pingxiang Customs on April 29,2021,and subsequently confirmed by Guangxi CDC laboratories on April 30.
基金supported by the National Natural Science Foundation of China(22076196,U22B20139,21906163,and 21876182)the Strategic Priority Research Program of the Chinese Academy of Sciences(XDA21000000)the K.C.Wong Education Foundation(GJTD-2018-10).
文摘Luminescent metal-organic frameworks(LMOFs)have been extensively used as sensitive and selective sensors for carcinogenic chromium(VI)oxyanions.However,the correlation between the MOF structure and the Cr(VI)sensing efficacy remains underexplored,hindering the rational design of MOFs for Cr(VI)sensing.Herein,we overcome this challenge by judiciously selecting the rarely touched thorium cations and a tetraphenylethene-based ligand for building two novel thorium-based MOFs,Th-BCTPE-1 and Th-BCTPE-2.Despite being built from identical precursors,Th-BCTPE-1 shows more sensitive luminescence quenching responses to CrO_(4)^(2-)and Cr_(2)O72-than Th-BCTPE-2,producing the second highest quenching constants of CrO_(4)^(2-)among all LMOF-based Cr(VI)sensors.We further decoupled the influences of different structural variables and the corresponding physiochemical properties,including porosity,BET surface area,photoluminescence quantum yield,and adsorption capacity,showing that the sensing efficacy of Cr(VI)oxyanions is more relevant to the adsorption capacity and the degree of the inner filter effect than the rest of the variables in this system.
