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Room-temperature chlorine gas sensor based on CdSnO_(3) synthesized by hydrothermal process

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Journal of Advanced Ceramics 2013年第1期2卷 31-36页

作者： Xiaohua ZHAO Zhenzhen li xiangdong LOU Meng li Ning ZHANG School of Chemistry and Chemical Engineering Henan Normal UniversityXinxiang 453007China

The perovskite-structure CdSnO_(3) was obtained by calcinating CdSnO_(3)·3H_(2)O precursor at 550℃,which was synthesized by hydrothermal process at 170℃for 16 h.The phase and microstructure of the obtained CdSnO_(3) powders were characterized by X-ray diffraction(XRD),scanning electron microscopy(SEM)and transmission electron microscopy(TEM).The CdSnO_(3) powders exhibit uniformly cubic structure with side length of about 100 nm.The effects of working temperature and concentration of detected gas on the gas response were studied.The selectivity of chlorine gas against other gases and response-recovery time of the sensor were also investigated.The results reveal that the CdSnO_(3) gas sensor has enhanced sensing properties to 1-10 ppm chlorine gas at room temperature;the value of gas response can reach 1338.9 to 5 ppm chlorine gas.Moreover,the sensor shows good selectivity and quick response behavior(23 s)to chlorine gas,indicating its application in detecting chlorine gas at room temperature in the future.

关键词： chlorine gas sensor room temperature CdSnO_(3) hydrothermal process

Biosafety and data quality considerations for animal experiments with highly infectious agents at ABSL-3 facilities

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Journal of Biosafety and Biosecurity 2019年第1期1卷 50-55页

作者： Guo Ming Wang Yong liu Jinbiao Huang Zhixiang li xiangdong ABSL-3 Laboratory of Wuhan University/Center for Animal Experiment of Wuhan University China

Animal models are crucial for the study of severe infectious diseases,which is essential for determining their pathogenesis and the development of vaccines and drugs.Animal experiments involving risk grade 3 agents such as SARS CoV,HIV,M.tb,H7N9,and Brucella must be conducted in an Animal Biosafety Level 3(ABSL-3)facility.Because of the in vivo work,the biosafety risk in ABSL-3 facilities is higher than that in BSL-3 facilities.Undoubtedly,management practices must be strengthened to ensure biosafety in the ABSL-3 facility.Meanwhile,we cannot ignore the reliable scientific results obtained from animal experiments conducted in ABSL-3 laboratories.It is of great practical significance to study the overall biosafety concepts that can increase the scientific data quality.Based on the management of animal experiments in the ABSL-3 Laboratory of Wuhan University,combined with relevant international and domestic literature,we indicate the main safety issues and factors affecting animal experiment results at ABSL-3 facilities.Based on these issues,management practices regarding animal experiments in ABSL-3 facilities are proposed,which take into account both biosafety and scientifically sound data.

关键词： ABSL-3 Animal experiment Biosafety Scientifically sound data quality Management

“中国近现代史纲要”中“两大矛盾”与“早期探索”释疑

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南阳师范学院学报 2024年第4期23卷 82-88页

作者：李向东河南工程学院马克思主义学院河南郑州451191

“中国近现代史纲要”教材中关于近代中国“两大矛盾”决定了“两大历史任务”的表述不太严谨,对于“早期探索”的概念解释亦不十分明确。不同历史时期有不同的社会主要矛盾及其对应的历史任务,近代中国面临的民族矛盾和阶级矛盾决定着... 详细信息

“中国近现代史纲要”教材中关于近代中国“两大矛盾”决定了“两大历史任务”的表述不太严谨,对于“早期探索”的概念解释亦不十分明确。不同历史时期有不同的社会主要矛盾及其对应的历史任务,近代中国面临的民族矛盾和阶级矛盾决定着中国人民反帝反封建的两大历史任务。解决社会主要矛盾、完成历史任务的过程就是对国家出路探索的过程,早期探索均以失败告终,只有中国共产党坚守初心,探索出了中国特色社会主义的道路,并夺取了伟大的胜利。

关键词： “中国近现代史纲要” 教材两大矛盾道路探索

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山东地区暖通设计概览

暖通空调 2023年第11期53卷 92-100页

作者：李向东山东省建筑设计研究院有限公司济南

分析了山东地区的地域及气候特征,介绍了与暖通设计相关的地方政策与标准规定,对供暖空调系统设计中的常见问题进行了归纳整理,可供在山东地区从事暖通设计的人员参考。

关键词：山东地区暖通空调设计政策标准概览

Abnormal corrosion behavior of dual-main phase sintered(Ce,Nd)-Fe-B magnets in different sodium solutions

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Journal of Rare Earths 2020年第7期38卷 735-741,I0002页

作者： Xiaoning Shi Minggang Zhu xiangdong Wang Shaoxiong Zhou Xin Wang Meiling Zhang Wei li Division of Functional Material Central Iron&Steel Research InstituteBeijing 100081China Advanced Technology&Materials Co. Ltd.Beijing 100081China

Sintered(Ce,Nd)-Fe-B magnets with high cost performance were prepared by substituting of Ce for Nd with the dual-main phase method.The corrosion behaviors of dual-main phase sintered(CexNd1-x)30Fe69B1(x=0.15 wt%,0.3 wt%) magnets,which were named as Ce15 and Ce30,were studied in 3.5 wt% NaCl,6.6 wt% Na2 SO4 and 3.0 wt% NaOH aqueous solutions,respectively.The galvanic corrosion of Ce30 is stronger than that of Ce15.However,the mass loss value of Ce30 is smaller than Ce15 after free corrosion for 33 d in NaCl solution.In the other two solutions,all the results show that the corrosion resistance of Ce30 is better than that of Ce15.The scanning electron microscope results show that the crack and shedding of the magnetic phase of Ce30 is less than that of Ce15.Combined above,the abnormal corrosion behavior shows that Ce30 magnets perform better corrosion resistance than Ce15,and the degradation degree of magnetic phase mainly affects the corrosion resistance of magnets.

关键词： Corrosion Dual main phases Sintered(Ce,Nd)-Fe-B Magnetic phase Crack Rare earths

自然对流工况下堆顶三维温度场及流场数值模拟研究

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核动力工程 2023年第S02期44卷 44-49页

作者：唐向东李维中国核动力研究设计院反应堆系统设计技术重点实验室成都610213

压水堆核电厂堆顶设备较多,温度场和流场复杂。为评估采用自然对流对控制棒驱动机构(CRDM)进行冷却的可行性。基于FLUENT软件,对自然对流工况下堆顶结构开展数值模拟研究,得到4种工况下的流场、温度场分布及线圈最高温升。模拟结果表明... 详细信息

压水堆核电厂堆顶设备较多,温度场和流场复杂。为评估采用自然对流对控制棒驱动机构(CRDM)进行冷却的可行性。基于FLUENT软件,对自然对流工况下堆顶结构开展数值模拟研究,得到4种工况下的流场、温度场分布及线圈最高温升。模拟结果表明,不同运行工况下,采用自然对流的方式均能将CRDM运行产生的热量完全带出堆坑,不存在堆坑窝热情况,CRDM线圈温度均不会超过其工作温度限值。为采用自然对流对CRDM进行冷却提供了重要依据。

关键词：压水堆驱动机构温度场自然对流

Molecular Epidemiology of Porcine Circovirus Type 3 Infection in Swine Herds in China

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Virologica Sinica 2018年第4期33卷 373-377页

作者： Xiangdong Li Chaolin Zhang Mingming Qiao Jiangsong Guo Guangyuan Xing Chunxia Jins Juan Wang Ming Sun Kegong Tian College of Animal Science and Veterinary Medicine Henan Agricultural University Zhengzhou 450002 China National Research Center for Veterinary Medicine High-Tech District Luoyang 471003 China Beijing Anheal Laboratories Co. Ltd. Beijing 100094 China Pulike Bio-engineering Co. Ltd. Luoyang 471003 China Sino Science Gene Technology Co. Ltd. Luoyang 471003 China

Dear Editor,Porcine circovirus type 3(PCV3)is a new-emerging circovirus belonging to the genus Circovirus in the family Circoviridae in which PCV type 1(PCV1)and PCV type 2(PCV2)were well documented(Palinski et al.2017).PCV1 is a cell culture-derived virus and is considered to be nonpathogenic for swine,whereas PCV2 is the primary etiological agent of porcine circovirus-associated

关键词：类型传染病学猪中国分子感染 PCV2 经济损失

Functionalized gadofullerene ameliorates impaired glycolipid metabolism in type 2 diabetic mice

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Journal of Genetics and Genomics 2022年第4期49卷 364-376页

作者： Jin Wu Yingbo Chen Xue li liyuan Ran Xiangdong Liu Xiaoshuang Wang Mingming Zhen Shanshan Shao li Zeng Chunru Wang Bin liang Jiajun Zhao Yingjie Wu Shandong Provincial Hospital Shandong Laboratory Animal CenterScience and Technology Innovation CenterShandong First Medical University&Shandong Academy of Medical SciencesJinanShandong 250021China Institute for Genome Engineered Animal Models of Human Diseases Dalian Medical UniversityDalianLiaoning 116044China Beijing National Laboratory for Molecular Sciences Key Laboratory of Molecular Nanostructure and NanotechnologyCAS Research/Education Center for Excellence in Molecular SciencesInstitute of ChemistryChinese Academy of SciencesBeijing 100190China Center for life Sciences School of Life SciencesYunnan UniversityKunmingYunnan 650091China Department of Molecular Pathobiology New York University College of DentistryNew York 10010USA

The soaring global prevalence of diabetes makes it urgent to explore new drugs with high efficacy and safety.Nanomaterial-derived bioactive agents are emerging as one of the most promising candidates for biomedical application.In the present study,we investigated the anti-diabetic effects of a functionalized gadofullerene(GF)using obese db/db and non-obese mouse model of type 2 diabete mellitus(MKR)mouse type 2 diabetes mellitus(T2DM)models.In both mouse models,the diabetic phenotypes,including hyperglycemia,impaired glucose tolerance,and insulin sensitivity,were ameliorated after two or four weeks of intraperitoneal administration of GF.GF lowered blood glucose levels in a dose-dependent manner.Importantly,the restored blood glucose levels could persist ten days after withdrawal of GF treatment.The hepatic AKT/GSK3β/FoxO1 pathway is shown to be the main target of GF for rebalancing gluconeogenesis and glycogen synthesis in vivo and in vitro.Furthermore,GF treatment significantly reduced weight gain of db/db mice with reduced hepatic fat storage by the inhibition of de novo lipogenesis through m TOR/S6K/SREBP1 pathway.Our data provide compelling evidence to support the promising application of GF for the treatment of T2DM.

关键词： Functionalized gadofullerene Type 2 diabetes Glycolipid metabolism AKT De novo lipogenesis

Improved generation of correlated photon pairs from monolayer WS_2 based on bound states in the continuum

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Photonics Research 2019年第3期7卷 341-350页

作者： TIECHENG WANG ZHIXIN li xiangdong ZHANG Beijing Key Laboratory of Nanophotonics & Ultrafine Optoelectronic Systems School of Physics Beijing Institute of Technology

Entangled photons are the fundamental resource in quantum information processing. How to produce them efficiently has always been a matter of concern. Here we propose a new way to produce correlated photons efficiently from monolayer WS_2 based on bound states in the continuum(BICs). The BICs of radiation modes in the monolayer WS_2 are realized by designing the photonic crystal slab-WS_2-slab structure. The generation efficiency of correlated photon pairs from such a structure has been studied by using a rigorous quantum model of spontaneous parametric down-conversion with the plane wave expansion method. It is found that the generation efficiency of correlated photon pairs is greatly improved if the signal and idler fields are located at the BICs determined by the inverse scattering matrix of the structure. This is in contrast to the parametric down-conversion process for the enhanced generation of nonlinear waves if the pump field is located at the BICs determined by the scattering matrix of the structure. The generation rate of the correlated photon pairs can be improved by 7 orders of magnitude in some designed structures. The generated quantum signals are sensitive to the wavelength and exhibit narrowed relative line width, which is very beneficial for quantum information processing.

关键词： correlated photon pairs monolayer WS2 based bound states