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EAF steelmaking process with increasing hot metal charging ratio and improving slagging regime

International Journal of Minerals,Metallurgy and Materials 2009年第4期16卷 375-382页

作者： Jian-ping duan Yong-liang Zhang xue-min Yang Technical Center of Shanxi Taigang Stainless Corporation Limited Taiyuan Shanxi 030003 China Institute of Process Engineering Chinese Academy of Sciences Beijing 100190 China

A new electric arc furnace （EAF） steelmaking process with increasing hot metal charging ratio and improving slagging regime simultaneously was developed and applied in a 50 t electric arc furnace for more than a year at No. 1 Steelmaking Plant of Shanxi Taigang Stainless Corporation Limited. The essential fact of the new EAF steelmaking process was to charge hot metal in two portions or steps： firstly, 35wt%-40wt% hot metal was pretreated by blowing oxygen in a specially designed reactor for decar burization and improving hot metal temperature and melting premelted slag; secondly, 30wt% hot metal was charged into EAF with high basicity refining slags from ladle furnace （LF）-vacuum degassing furnace （VD） refining process. The results show that the hot metal charging ratio can reach to about 65wt%-70wt% for the new EAF steelrnaking process; meanwhile, the tap-to-tap time of a 50 t EAF can shorten by 5-10 min, the electricity consumption can decrease by 35-50 kW·h/t, the lime consumption can reduce by 10.5 kg/t of molten steel, and the content of harmful heavy metals in molten steel can be easily controlled to less than the upper limits of aimed steel specification or grade compared with the traditional EAF steelmaking process. In addition, the dephosphorization ability shows a slight strengthening, however, a small degree of lessening for desulphurization ability is observed for the new EAF steelmaking process, but the weakness of desulphurization ability cannot become an obstacle to its further application since a stronger desulphurization ability can be achieved during secondary refining of LF coupled with VD after EAF steelmaking process.

关键词： electric arc furnace (EAF) charge ratio slagging refining slags lime

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Integrated electrocatalysts derived from metal organic frameworks for gas-involved reactions

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Nano Materials Science 2023年第2期5卷 161-176页

作者： Yuke Song Wenfu Xie Mingfei Shao xue duan State Key Laboratory of Chemical Resource Engineering Beijing University of Chemical TechnologyBeijing100029China

Integrated electrocatalysts(IECs)containing well-defined functional materials directly grown on the current collector have sparked increasing interest in the fields of electrocatalysis owing to efficient activity,high stability and the fact that they are easily assembled into ***,metal organic frameworks(MOFs)provide a promising platform for constructing advanced IECs because of their properties of low cost,large surface area and efficient structural *** this review,the design principles of state-of-the-art IECs based on MOFs are presented,including by hydrothermal/solvothermal,template-directed,electrospinning,electrodeposition and other *** high performance of MOF-derived IECs has also been demonstrated in electrocatalytic gasinvolved *** is promising for green energy storage and *** structure-activity relationship and performance improvement mechanism of IECs are uncovered by discussing some in situ technologies for ***,we provide an outlook on the challenges and prospects in this booming field.

关键词： Integrated electrocatalyst Metal organic framework Structure-activity relationship Gas-involved reaction

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Smoke suppressant in flame retarded thermoplastic polyurethane composites: Synergistic effect and mechanism study

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Nano Research 2021年第11期14卷 3926-3934页

作者： Hongyuan Ren Kelan Qing Ying Chen Yanjun Lin xue duan State Key Laboratory of Chemical Resource Engineering Beijing University of Chemical TechnologyBeijing100029China

Considerable smoke and toxic volatiles generation has compromised the application of thermoplastic polyurethane (TPU) and caused a great threat to human life. Here, nano-MgFe layered double hydroxide (MgFe-LDH) with uniform particle size was synthesized to reduce smoke density and toxic gases of TPU composites using ammonium polyphosphate (APP) as a flame retardant agent. The results show that the combination of 16 wt.% APP and 4 wt.% MgFe-LDH greatly decreased the smoke density (D20min and Ds, max), smoke production rate (SPR) and heat release rate (HRR) of TPU composites. Furthermore, the MgFe-LDH synergist demonstrated high efficiency in decreasing total volatiled products and toxic volatiles evolved, such as the CO, HCN and isocyanates. The reason was mainly attributed to the chemical reaction between MgFe-LDH and APP, which can promote the compactness of char layers with fine microstructure formed in the decomposition process of MgFe-LDH/APP/TPU composites. The protective char layers could act as barriers between combustion zone and matrix to protect the unburned substrate and promote smoke suppression effect.

关键词： layered double hydroxide thermoplastic polyurethane smoke suppression synergistic effect

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Unveiling phosphofructokinase as the key target: an innovative strategy combining pull-down assays with optical imaging for snail-killing mechanism exploration

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Science China Chemistry 2025年

作者： Yuxun Lu Weisi Wang Le Yu Yuqiang Zhao Ying Chen yunhai Guo Bingrong Luo Yuhua Liu Shizhu Li Liping duan Ying Zhou yunnan Characteristic Plant Extraction Laboratory College of Chemical Science and Technology Yunnan University College of Biological and Chemical Engineering Guangxi University of Science and Technology National Institute of Parasitic Diseases Chinese Center for Disease Control and Prevention (Chinese Center for Tropical Diseases Research)NHC Key Laboratory of Parasite and Vector Biology WHO Collaborating Centre for Tropical Diseases National Center for International Research on Tropical Diseases School of Chemistry and Environment Yunnan Minzu University Dali Institute of Schistosomiasis Control

The Pomacea canaliculata, also known as apple snail, is an invasive species in China, posing a serious threat to agricultural production and public health. To prevent its rampant infestation, we developed a highly efficient snail-killing lead compound, 1-(4-chlorophenyl)-3-(pyridin-3-yl)urea (PBQ). However, the killing mechanism of PBQ remains unclear. To elucidate this, two novel compounds, B-PBQ and J-PBQ, were developed through structural modification of PBQ and were used, through both protein pull-down assay and confocal laser scanning microscopy imaging, to identify and confirm that phosphofructokinase(PFK) in the apple snail is the primary target protein of PBQ. Further studies revealed that PBQ successfully inhibits the activity,content, and expression of PFK in apple snail, disrupting the glycolysis pathway and leading to abnormal energy *** disruptions impair the snail’s tolerance to low oxygen, resulting in its efficient eradication. These findings offer a promising direction for developing next-generation PFK-targeted snail-killing pesticides. Furthermore, the strategy of combining pull-down assays with optical imaging used in this work provides a novel approach for the exploration of mechanisms of other pesticide candidates.

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Dramatic impact of metric choice on biogeographical regionalization

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Plant Diversity 2020年第2期42卷 67-73页

作者： Jian-Fei Ye yun Liu Zhi-duan Chen State Key Laboratory of Systematic and Evolutionary Botany Institute of BotanyChinese Academy of SciencesBeijing 100093China University of Chinese Academy of Sciences Beijing 100049China Beijing Botanical Garden.Institute of Botany Chinese Academy of SciencesBeijing W0093China

For a quantitative biogeographical regionalization,the choice of an appropriate dissimilarity index to measure pairwise distances is *** different metrics have been used,but there is no specific study to test the impact of metric choice on biogeographical *** herein applied a hierarchical cluster analysis on the mean nearest taxon distance(MNTD)and the phylogenetic turnover component of the SФrensen dissimilarity index(pβsim)pairwise distances to generate two schemes of phylogenetic regio nalization of the Chinese flora,and then evaluated the effect of metric *** regionalization based on MNTD was influenced by richness differences,but regionalization based on pβsim can clearly reflect the evolutionary history of the Chinese *** provided a brief description of the five regions identified by pβsim,and the regionalization can help develop strategies to effectively conserve the taxa and floristic regions with different origins and evolutionary histories.

关键词： Angiosperms Chinese flora Dissimilarity index Distance metrics Spatial turnover

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Impact of Media Information on Social Response in Disasters:A Case Study of the Freezing‑Rain and Snowstorm Disasters in Southern China in 2008

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International Journal of Disaster Risk Science 2024年第1期15卷 73-87页

作者： Jia He Wenjing duan Yuxuan Zhou yun Su College of Geographic Science and Tourism Xinjiang Normal UniversityUrumqi 830054China Xinjiang Laboratory of Lake Environment and Resources in Arid Zone Urumqi 830054China Faculty of Geographical Science Beijing Normal UniversityBeijing 100875China Key Laboratory of Environmental Change and Natural Disaster Ministry of EducationBeijing Normal UniversityBeijing 100875China

Disaster information content is an objective mapping of disaster situations,social response,and public *** response to emergency is an important mechanism for implementing and guaranteeing emergency management of major natural hazard-related *** how disaster information content affects social response to emergencies is helpful for managing risk communication and efficient disaster *** on the 2008 freezing-rain and snowstorm disasters in southern China,this study used Python to extract 7,857 case-related media reports and applied natural language processing for text *** used three typical cases to identify and analyze disaster media report content and the relationship between these reports and the social response to the *** categories of disaster response-such as prewarning and forecasting,announcements by the authorities,and social mobilization-appeared in the disaster information in the media,along with disaster impact information,that is,real-time disaster *** response information and an appropriate amount of disaster impact information played important roles in prewarning,disaster relief,public opinion guidance,and social stability maintenance and can serve important functions in communicating with all stakeholders of emergency management,assisting or influencing emergency departments or individuals in decision making,and eliminating "information islands." Empathy caused the general public to become "disaster responders" through receiving *** and an excess of negative information may have a perverse amplification effect on public opinion and increase the unpredictability of the disaster situation and the risk of social crisis.

关键词： Emergency management Freezing-rain and snowstorm disasters Media reports on disasters Social response to emergencies China

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复方苦黛汤不同提取部位抗炎作用的筛选及作用机制初探

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中南药学 2016年第6期14卷 585-589页

作者：周从辉王秀兰姜楠孙婉瑾孙伟段雪云朱田密湖北省中医院武汉430061

目的探讨复方苦黛汤不同提取部位对溃疡性结肠炎(UC)大鼠的治疗作用及其作用机制。方法通过观测UC大鼠一般情况和病理组织切片HE染色,检测复方苦黛汤不同提取部位对TNBS诱导的UC大鼠结肠组织髓过氧化物酶(MPO)、丙二醛(MDA)、超氧化物... 详细信息

目的探讨复方苦黛汤不同提取部位对溃疡性结肠炎(UC)大鼠的治疗作用及其作用机制。方法通过观测UC大鼠一般情况和病理组织切片HE染色,检测复方苦黛汤不同提取部位对TNBS诱导的UC大鼠结肠组织髓过氧化物酶(MPO)、丙二醛(MDA)、超氧化物歧化酶(SOD)、谷胱甘肽过氧化物酶(GSH-Px)、一氧化氮(NO)和一氧化氮合酶(NOS)的影响,评价其不同提取部位对UC大鼠的治疗作用。结果复方苦黛汤氯仿提取部位可明显降低UC大鼠结肠组织中MPO、MDA、NOS和NO水平,增加SOD和GSH-Px活性,同时大鼠一般情况及病理组织HE染色亦显著得到改善。结论复方苦黛汤氯仿提取部位能显著抑制UC大鼠的氧化应激反应,减少结肠炎症损害,可以筛选复方苦黛汤的氯仿部位作为进一步的研究分析。

关键词：溃疡性结肠炎复方苦黛汤抗氧化

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Layered double hydroxides:Scale production and application in soil remediation as super-stable mineralizer

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Chinese Journal of Chemical Engineering 2022年第1期35卷 42-48页

作者： Fangqi Mao Peipei Hao Yuquan Zhu Xianggui Kong xue duan State Key Laboratory of Chemical Resource Engineering Beijing University of Chemical TechnologyBeijing 100029China

Soil contamination by heavy metals has presented severe risks to human health through food *** one of the most promising remediation technologies,in-situ immobilization strategy has been widely adopted in ***,considering the large quantities of contaminated soil,it is still a huge challenge to design low-cost amendments with strong and long-term immobilization *** double hydroxides(LDHs)have drawn tremendous attention in fundamental research and practical application because of their unique ***,owing to its super-stable mineralization effect to heavy metal ions,LDHs have exhibited great potential in the field of soil *** this work,we mainly focused on the scale production strategy of LDHs with low-cost,and its application in soil ***,several key challenges in using LDHs as amendments for immobilization of heavy metal ions are *** hope that this mini-review could shed light on the sustainable development of LDHs as amendment for heavy metals in future research directions.

关键词： Heavy metals Pollution Remediation Layered double hydroxides Scale-up Super-stable mineralization effect

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Versatile Inorganic Oligomer-based Photochromic Spiropyrane Gels

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Chinese Journal of Structural Chemistry 2022年第5期41卷 37-47页

作者： Jiajia Song Wei duan yun Chen Xiangyang Liu State Key Laboratory of Chemo/Biosensing and Chemometrics College of Chemistry and Chemical EngineeringHunan UniversityChangsha 410082China College of Ocean and Earth Sciences College of MaterialsCollege of Physical Science and TechnologyState Key Laboratory of Marine Environmental Science(MEL)Research Institute for Biomimetics and Soft MatterXiamen UniversityXiamen 361005China Department of Physics National University of Singapore2 Science Drive 3Singapore 117542Singapore

Here we report an example of a general strategy for the immobilization of various different photochromic spiropyran molecules on eco-friendly cheap *** spiropyrans are encapsulated in calcium salt oligomers-based gels by centrifugation,forming an inorganic oligomer-based gelatinous photoswitchable hybrid ***^(2+)is also used to regulate the optical properties of spiropyrans through *** oligomer-based gel can not only provide the space required for photoisomerization,but also reduce the interference of the surrounding environment on the photochromic ***,a practical paper-based and colloidal flexible substrate platform is constructed for the removal and naked-eye detection of liquid and gaseous hydrazine at room temperature based on the reactivity of the formyl group on spiro-pyrans loaded in Ca3(PO4)2 *** general strategy can be used for other inorganic oligomer-based molecular switches and sensing systems.

关键词： inorganic oligomer photochromic gels naked-eye detection of hydrazine

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Metabolome and RNA-seq reveal discrepant metabolism and secretory metabolism profile in skeletal muscle between obese and lean pigs at different ages

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Science China Life Sciences 2025年

作者： Liu Guo Junfei Xu Wenyue Zhou Sisi Chen Hanjing Shi Mengmeng Han Zekun Yang Yehui duan Weijun Pang Yulong Yin Fengna Li Laboratory of Animal Nutritional Physiology and Metabolic Process Key Laboratory of Agro-ecological Processes in Subtropical Region Institute of Subtropical Agriculture Chinese Academy of Sciences University of Chinese Academy of Sciences Laboratory of Animal Fat Deposition and Muscle Development College of Animal Science and Technology Northwest A&F University College of Advanced Agricultural Sciences University of Chinese Academy of Sciences

Metabolites and metabolism-related gene expression profiles in skeletal muscle change dramatically under obesity, aging and metabolic disease. Since obese and lean pigs are ideal models for metabolic research. Here, we compared metabolome and transcriptome of Longissimus dorsi(LD) muscle between Taoyuan black(TB, obese) and Duroc(lean) pigs at different ages. We defined the “window phase” of intramuscular fat(IMF) deposition in TB pig, which has significantly higher IMF than Duroc pig. Our results displayed discrepant lipid composition and different expression genes(DEGs) enriched in lipid metabolism, and both metabolome and transcriptome analyses revealed stronger energy expenditure and more active amino acid and protein metabolism in Duroc pig. 10 up-and 51 down-regulated biomarker metabolites with age-and breed-specificity were identified. Potential secretory metabolites, including organic acid(fumaric acid, succinate,malic acid, and gamma-aminobutyric acid), amino acid(L-lysine, and L-glutamic acid), lipid(2-hydroxyisovaleric acid, and L-carnitine) were demonstrated a significant correlation with IMF deposition. Our research highlights the huge difference of metabolic spectrum in skeletal muscle between obese and lean model and muscle-derived secretory metabolites might act as an ambassador of intercellular communication to regulate systematic metabolism.

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