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电感耦合等离子体质谱法在保健食品重金属元素检测中的应用与优化

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食品安全导刊 2024年第24期 84-86,90页

作者：于跃张磊周东涛青岛市食品药品检验研究院国家药品监督管理局海洋中药质量研究与评价重点实验室山东青岛266071

目的:优化电感耦合等离子体质谱法(Inductively Coupled Plasma-Mass Spectrometry,ICPMS),以提高检测保健食品中重金属元素的灵敏度和准确性。方法:通过采用碰撞反应池技术以及选用铑(Rh)作为内标元素,对ICP-MS方法进行优化。结果:各... 详细信息

目的:优化电感耦合等离子体质谱法(Inductively Coupled Plasma-Mass Spectrometry,ICPMS),以提高检测保健食品中重金属元素的灵敏度和准确性。方法:通过采用碰撞反应池技术以及选用铑(Rh)作为内标元素,对ICP-MS方法进行优化。结果:各元素的方法检出限为0.005μg·L^(-1),定量限为0.015μg·L^(-1),加标回收率在96.7%~98.5%,相对标准偏差小于5%,在保健食品中重金属元素检测方面表现出了较高的灵敏度和准确性。结论:优化后的ICP-MS方法提高了信号强度和稳定性,质谱干扰得到有效消除。内标元素的引入提高了信号的稳定性和检测结果的准确性,为保健食品中重金属元素检测提供了科学的技术支持。

关键词：保健食品电感耦合等离子体质谱法重金属元素检测

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Emerging trends in organ-on-a-chip systems for drug screening

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药学学报:英文版 2023年第6期13卷 2483-2509页

作者： Yanping Wang Yanfeng Gao Yongchun Pan dongtao zhou Yuta Liu Yi Yin Jingjing Yang Yuzhen Wang Yujun Song College of Engineering and Applied Sciences State Key Laboratory of Analytical Chemistry for Life ScienceNanjing UniversityNanjing 210023China Sino-French Engineer School Nanjing University of Science and TechnologyNanjing 210094China Key Laboratory of Flexible Electronics&Institute of Advanced Materials Jiangsu National Synergistic Innovation Center for Advanced MaterialsNanjing Tech UniversityNanjing 211816China

New drug discovery is under growing pressure to satisfy the demand from a wide range of domains, especially from the pharmaceutical industry and healthcare services. Assessment of drug efficacy and safety prior to human clinical trials is a crucial part of drug development, which deserves greater emphasis to reduce the cost and time in drug discovery. Recent advances in microfabrication and tissue engineering have given rise to organ-on-a-chip, an in vitro model capable of recapitulating human organ functions in vivo and providing insight into disease pathophysiology, which offers a potential alternative to animal models for more efficient pre-clinical screening of drug candidates. In this review, we first give a snapshot of general considerations for organ-on-a-chip device design. Then, we comprehensively review the recent advances in organ-on-a-chip for drug screening. Finally, we summarize some key challenges of the progress in this field and discuss future prospects of organ-on-a-chip development. Overall,this review highlights the new avenue that organ-on-a-chip opens for drug development, therapeutic innovation, and precision medicine.

关键词： Microfluidics Drug discovery In vitro models Microphysiological systems Toxicity assessment Bioprinting Drug safety Human-on-a-chip

Coke behavior with H_(2)O in a hydrogen-enriched blast furnace:A review

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International Journal of Minerals,Metallurgy and Materials 2024年第5期31卷 959-976页

作者： Feng zhou Daosheng Peng Kejiang Li Alberto N.Conejo Haotian Liao Zixin Xiong dongtao Li Jianliang Zhang School of Metallurgical and Ecological Engineering University of Science and Technology BeijingBeijing 100083China School of Chemical Engineering The University of QueenslandSt LuciaQLD 4072Australia Baosteel Central Research Institute(R&D Center of Wuhan Iron&Steel Co. Ltd.)Wuhan 430080China Shougang Research Institute of Technology Shougang Group Corporation Ltd.Beijing 100043China Beijing Key Laboratory of Green Recyclable Process for Iron and Steel Production Technology Beijing 100043China

Hydrogen-enriched blast furnace ironmaking has become an essential route to reduce CO_(2)emissions in the ironmaking ***,hydrogen-enriched reduction produces large amounts of H_(2)O,which places new demands on coke quality in a blast *** a hydrogen-rich blast furnace,the presence of H_(2)O promotes the solution loss *** result improves the reactivity of coke,which is 20%-30%higher in a pure H_(2)O atmosphere than in a pure CO_(2)*** activation energy range is 110-300 kJ/mol between coke and CO_(2)and 80-170 kJ/mol between coke and H_(2)***_(2)and H_(2)O are shown to have different effects on coke degradation *** review provides a comprehensive overview of the effect of H_(2)O on the structure and properties of *** exploring the interactions between H_(2)O and coke,several unresolved issues in the field requiring further research were *** review aims to provide valuable insights into coke behavior in hydrogen-rich environments and promote the further development of hydrogen-rich blast furnace ironmaking processes.

关键词： hydrogen ironmaking coke behavior blast furnace gasification microstructure kinetics

The etching strategy of zinc anode to enable high performance zinc-ion batteries

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Journal of Energy Chemistry 2024年第1期88卷 125-143,I0004页

作者： Xueqing Fu Gaopeng Li Xinlu Wang Jinxian Wang Wensheng Yu Xiangting Dong dongtao Liu School of Chemistry and Environmental Engineering Changchun University of Science and TechnologyChangchun 130022JilinChina Department of Chemistry Northeast Normal UniversityChangchun 130024JilinChina

Zinc-ion batteries(ZIBs)are considered to be one of the most promising candidates to replace lithium-ion batteries(LIBs)due to the high theoretical capacity,low cost and intrinsic ***,zinc dendrites,hydrogen evolution reaction,surface passivation and other side reactions will inevitably occur during the charging and discharging process of Zn anode,which will seriously affect the cycle stability of the battery and hinder its practical *** etching strategy of Zn anode has attracted wide attention because of its simple operation and broad commercial prospects,and the etched Zn anode can effectively improve its electrochemical ***,there is no comprehensive review of the etching strategy of Zn *** review first summarizes the challenges faced by Zn anode,then puts forward the etching mechanisms and properties of acid,salt and other ***,based on the above discussion,the challenges and opportunities of Zn anode etching strategy are proposed.

关键词： Zinc-ion batteries Zn anode Etching 3D structures Dendrite-free

Paleo-uplift forced regional sedimentary evolution:A case study of the Late Triassic in the southeastern Sichuan Basin,South China

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Petroleum 2024年第3期10卷 462-473页

作者： Fangyu He Qingsong Cheng dongtao Zhang Yubing Ji Ziying Wang Tenghui Lu PetroChina Zhejiang Oilfield Company Hangzhou 310023China School of Geoscience and Technology Southwest Petroleum UniversityChengdu610500China Sichuan Natural Gas Geology Key Laboratory Southwest Petroleum UniversityChengdu610500China

The sedimentary environment of the Upper Triassic in the southeastern Sichuan Basin is obviously controlled by Luzhou paleo-uplift(LPU).However,the influence of paleo-uplift on the sedimentary patterns of the initial stages of this period in the southeastern Sichuan Basin has not yet been clear,which has plagued oil and gas exploration and *** study shows that there is a marine sedimentary sequence,which is considered to be the first member of Xujiahe Formation(T_(3)X^(1))in the southeastern Sichuan *** development of LPU resulted in the sedimentary differences between the eastern and western Sichuan Basin recording T_(3)X^(1)and controlled the regional sedimentary *** western part is dominated by marine sediments,but the eastern paleo-uplift area is dominated by continental sedimentation in the early stage of T_(3)X^(1),and it begins to transform into a marine sedimentary environment consistent with the whole basin in the late stage of the period recorded by the Xujiahe *** evidences are as follows:(1)time series:based on the cyclostratigraphy analysis of Xindianzi section and Well D2,in the southeastern Sichuan Basin,the period of sedimentation of the Xujiahe Formation is about 5.9 Ma,which is basically consistent with the Qilixia section,eastern Sichuan basin,where the Xujiahe Formation is widely considered to be relatively complete;(2)distribution and evolution of palaeobiology:based on analysis of abundance evolution of major spore-pollen,many land plant fossils are preserved in the lower part of T_(3)X^(1),indicates the sedimentary environment of continental *** the upper part of T_(3)X^(1),the fossil of terrestrial plants decreased,while the fossil of marine and tidal environment appeared,this means that it was affected by the sea water in the late stages of T_(3)X^(1);(3)geochemistry:calculate the salinity of water from element indicates that the uplift area is continental sedimentary environment in the early stage

关键词： Luzhou paleo-uplift Late Triassic Cyclostratigraphy Palynology Sedimentary environment

Coercivity mechanism of high-performance anisotropic heterostructure SmCo5 magnets

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Journal of Rare Earths 2024年第10期42卷 1882-1888页

作者： Yuan Teng Yuqing Li Weiqiang Liu Xiaochang Xu Zhanjia Wang Jianjun Yang dongtao Zhang Hongguo Zhang Qingmei Lu Qiong Wu Weixing Xia Ming Yue Faculty of Materials and Manufacturing Key Laboratory of Advanced Functional MaterialsMinistry of Education of ChinaBeijing University of Technology School of Mechanical and Electrical Engineering Henan Institute of Science and Technology School of Mechanical Engineering Anyang Institute of Technology Key Laboratory of Magnetic Materials and Devices Ningbo Institute of Material Technology and EngineeringChinese Academy of Sciences

Due to its large magnetocrystalline anisotropy field and high Curie temperature,SmCo-based magnets are irreplaceable in high-temperature applications,The hot-deformed SmCo-based magnets are especially attractive for their excellent corrosion resistance,making them more suitable for harsh ***,it is still challenging for hot-deformed SmCo-based magnets to obtain high magnetization and high coercivity ***,it is necessary to analyze the relationship between its microstructure and magnetic properties and explore its magnetic hardening mechanism to guide the further improvement of magnetic *** this paper,the anisotropic heterostructure SmCo5magnet was prepared by combining large height-reduction and introducing a nano-grained Smrich *** c-axis texture,（BH）m of 16.1 MGOe,and Hciof 9.6 kOe were obtained via the heterostructure with SmCo5micron-grain and Sm-rich nano-scale *** magnetic domain observation and technical magnetization analysis demonstrate that the coe rcivity mechanism is dominated by *** results also show that the smooth and Sm-rich precipitated grain boundary provides weak pinning *** provides a reference for the development of high-pe rformance nanocrystalline SmCo5magnets.

关键词： Coercivity mechanism Heterostructure Hot-deformed SmCo magnet Permanent magnet Rare earths

社会生产力是制度的生产函数(下)——社会集成创造力的制度弹性

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生产力研究 2005年第4期 5-8,18页

作者：谭忠真邹东涛皮修平衡阳师范学院中国社会科学院社会科学文献出版社

中国最近20多年的强劲发展,源于改革在一定程度上激发了中国人的创造力。人类发展的历史证明,社会生产力实际上是人类集成创造力,它由三大系统构成。制度结构作用于人类集成创造力生成、发挥、发展全过程的“力”,则是制度生产力。人类... 详细信息

中国最近20多年的强劲发展,源于改革在一定程度上激发了中国人的创造力。人类发展的历史证明,社会生产力实际上是人类集成创造力,它由三大系统构成。制度结构作用于人类集成创造力生成、发挥、发展全过程的“力”,则是制度生产力。人类社会任何时期历史继承的现存创造力都是一个既定的量,但在不同的制度生产力作用下会产生不同的增量,有着不同的函数对应关系,即社会生产力变量是制度变量的生产函数,有效制度是解放和发展社会生产力的内在因素。

关键词：社会生产力社会集成创造力制度结构生产函数

Fast and Balanced Charge Transport Enabled by Solution-Processed Metal Oxide Layers for Efficient and Stable Inverted Perovskite Solar Cells

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Energy & Environmental Materials 2024年第2期7卷 240-248页

作者： Jing Zhang James Mcgettrick Kangyu Ji Jinxin Bi Thomas Webb Xueping Liu dongtao Liu Aobo Ren Yuren Xiang Bowei Li Vlad Stolojan Trystan Watson Samuel D.Stranks Wei Zhang Advanced Technology Institute(ATI) University of SurreyGuildfordSurrey GU27XHUK SPECIFIC College of EngineeringSwansea UniversityBay Campus SA18ENSwansea UK Cavendish Laboratory University of CambridgeJ JThomson AvenueCambridge CB30HEUK Department of Chemical Engineering&Biotechnology University of CambridgePhilippa Fawcett DriveCambridge CB30ASUK

Metal oxide charge transport materials are preferable for realizing long-term stable and potentially low-cost perovskite solar cells(PSCs).However,due to some technical difficulties(e.g.,intricate fabrication protocols,high-temperature heating process,incompatible solvents,etc.),it is still challenging to achieve efficient and reliable all-metal-oxide-based ***,we developed efficient inverted PSCs(IPSCs)based on solution-processed nickel oxide(NiO_(x))and tin oxide(SnO_(2))nanoparticles,working as hole and electron transport materials respectively,enabling a fast and balanced charge transfer for photogenerated charge *** further understanding and optimizing the perovskite/metal oxide interfaces,we have realized an outstanding power conversion efficiency(PCE)of 23.5%(the bandgap of the perovskite is 1.62 eV),which is the highest efficiency among IPSCs based on all-metal-oxide charge transport *** to these stable metal oxides and improved interface properties,ambient stability(retaining 95%of initial PCE after 1 month),thermal stability(retaining 80%of initial PCE after 2 weeks)and light stability(retaining 90%of initial PCE after 1000 hours aging)of resultant devices are enhanced *** addition,owing to the low-temperature fabrication procedures of the entire device,we have obtained a PCE of over 21%for flexible IPSCs with enhanced operational stability.

关键词： fast and balanced charge transfer inverted perovskite solar cells long-term stability low-temperature processing metal oxides

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集成运用多种能源技术的空调冷热源系统

暖通空调 2010年第2期40卷 64-67页

作者：杨光李义文郑乐晓周东滔华东建筑设计研究院有限公司上海世博(集团)有限公司

根据世博中心项目的特点和实际情况,在空调冷热源系统设计中集成应用了冰蓄冷、水蓄冷、江水源热泵、燃气锅炉等多种冷热源技术,并制定了合理的运行策略,以期更大程度地达到对能源的优化使用,实现绿色、节能、环保的设计目的。

关键词：冰蓄冷水蓄冷江水源热泵燃气锅炉空调冷热源