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Studies on the Reaction of Vinyl Triazole Derivatives with Hydroxylamine

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Chinese Chemical Letters 1997年第6期8卷 467-470页

作者： gui yu jin Guo Feng ZHAO Zhong Fa LIU jin REN yu Chang LI (Institute of Elemento-Organic Chemistry, National Key Laboratory of Elemento-Organic Chemistry.Nankai University, Tianjin 30007) NANKAI UNIV NATL KEY LAB ELEMENTOORGAN CHEMINST ELEMENTOORGAN CHEMTIANJIN 300071PEOPLES R CHINA

In this paper the reaction of vinyl triazole derivatives with hydroxylamine hydrochloride under the action of sodium carbonate was studied. The result indicated that cyclization took place and new heterocyclic compoun... 详细信息

关键词： ppm OH NH Studies on the Reaction of Vinyl Triazole Derivatives with Hydroxylamine Ph IR

Cyclization Reaction of α-Triazolyl-α, β-unsaturated Ketones with Phenyl hydrazine

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Chinese Chemical Letters 1998年第11期9卷 979-982页

作者： Guo Feng ZHAO Jun REN yu Chang LI gui yu jin (Institute of Elemento-Organic Chemistry, National Key Laboratory of Elemento-Organic Chemistry, Nankai University, Tianjin 300071) Nankai Univ Inst Elementoorgan Chem Natl Key Lab Elementoorgan Chem Tianjin 300071 Peoples R China

The reaction of α-triazolyl-α, β-unsaturated ketones with phenyl hydrazine was studied. The result indicated that cyclization took place and new heterocyclic compounds of substituted 4,5-2H-pyrazoles were obtained,... 详细信息

关键词： α β-unsaturated ketones phenyl hydrazine triazole cyclization pyrazoles

Predicting the efficiency of arsenic immobilization in soils by biochar using machine learning

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Journal of Environmental Sciences 2025年第1期147卷 259-267页

作者： jin-Man Cao yu-Qian Liu Yan-Qing Liu Shu-Dan Xue Hai-Hong Xiong Chong-Lin Xu Qi Xu gui-Lan Duan State Key Lab of Urban and Regional Ecology Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085China Henan Institute of Advanced Technology Zhengzhou UniversityZhengzhou 450052China University of Chinese Academy of Sciences Beijing 100049China

Arsenic(As)pollution in soils is a pervasive environmental *** immobilization offers a promising solution for addressing soil As *** efficiency of biochar in immobilizing As in soils primarily hinges on the characteristics of both the soil and the ***,the influence of a specific property on As immobilization varies among different studies,and the development and application of arsenic passivation materials based on biochar often rely on empirical *** enhance immobilization efficiency and reduce labor and time costs,a machine learning(ML)model was employed to predict As immobilization efficiency before biochar *** this study,we collected a dataset comprising 182 data points on As immobilization efficiency from 17 publications to construct three ML *** results demonstrated that the random forest(RF)model outperformed gradient boost regression tree and support vector regression models in predictive *** importance analysis and partial dependence plots based on the RF model were conducted to identify the most crucial factors influencing As *** findings highlighted the significant roles of biochar application time and biochar pH in As immobilization efficiency in ***,the study revealed that Fe-modified biochar exhibited a substantial improvement in As *** insights can facilitate targeted biochar property design and optimization of biochar application conditions to enhance As immobilization efficiency.

关键词： Biochar Arsenic immobilization Soil Machine learning

Evaluating complementaries among urban water,energy,infrastructure,and social Sustainable Development Goals in China

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Journal of Environmental Sciences 2025年第3期149卷 585-597页

作者： Ke yu Yifan Song jin Lin Shen Qu School of Management and Economics Beijing Institute of TechnologyBeijing 100081China Center for Energy&Environmental Policy Research Beijing Institute of TechnologyBeijing 100081China

Urban areas’performance in water,energy,infrastructure,and socio-economic sectors is intertwined and measurable through Sustainable Development Goals(SDGs)6–*** synergy among these is critical for *** study constructs an indicator framework that reflects progress towards these urban SDGs in *** indicate underperformance in SDGs 8–11,suggesting the need for transformative *** network analysis,the research reveals complementarities among these ***,the SDG space divides into socio-economic and ecological clusters,with SDG 6(Clean Water and Sanitation)central to ***,SDG 8(Decent Work and Economic Growth)and SDG 9(Industry,Innovation,and Infrastructure)act as bridges,while greater synergies exist between SDG 12(Responsible Consumption and Production)and SDG 13(Climate Action).An in-depth view at the indicator-level shows a core-periphery structure,emphasizing indicators like SDG 6.2(Wastewater Treatment Rate)and SDG 6.6(Recycled Water Production Capacity per capita)as *** study confirms the urban SDG space’s stability and predictiveness,underscoring its value in steering well-aligned policy decisions for sustainable growth.

关键词： Sustainable development goals Synergy Urban development Policy decisions

Observation of acoustic hybrid topological phases induced by the p-d orbital interactions

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Science China(Physics,Mechanics & Astronomy) 2025年第1期68卷 128-135页

作者： Xiao Xiang Feng Gao yu-gui Peng Peng Wu Zong-Lin Li Xue-Feng Zhu School of Physics and Innovation Institute Huazhong University of Science and TechnologyWuhan 430074China

In spinless systems,growing attention has recently been attracted to synthetic gauge fields,which redefine the fundamental crystal symmetries by utilizing the projective algebraic ***,synthetic gauge fields have been commonly investigated in single orbital systems,and explorations on hybrid orbitals remain elusive in ***,we report the experimental observation of hybrid topological phases induced by hybrid synthetic gauge flux,which is formed by the interaction between p and d orbitals embedded in acoustic *** breaking the translation symmetries of L_(x) and/or L_(y),we unambiguously demonstrate the first-order Möbius edge states and higher-order corner *** work establishes a platform for seeking exotic topological phases induced by hybrid-orbitals interactions and initializing the framework of hybrid-orbitalsrelated topological *** applications can be anticipated in scenarios such as high-quality sensing and robust wave trapping due to the stepwise energy distribution of the hybrid topological phase.

关键词： topological insulator synthetic gauge field projective symmetry corner states

Sporadic E responds to the 2022 Tonga volcano eruptions recorded by the Meridian Project

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Earth and Planetary Physics 2025年第1期9卷 20-28页

作者： YangYi Sun Tao yu jin Wang Chi Long School of Geophysics and Geomatics China University of Geosciences(Wuhan)Wuhan 430047China School of Physics and Electronic Science Guizhou Normal UniversityGuizhou 550001China

In this study,ionosonde observations over Fuke(19.5°N,109.1°E),Wuhan(30.5°N,114.4°E),and Mohe(53.5°N,122.3°E)were analyzed to demonstrate the responses of the sporadic E()to the severe atmospheric disturbances caused by the Tonga volcanic eruptions on January 15,*** most prominent signature was the disappearance of the layer after~10:00 UT over Wuhan and Fuke,which was attributed to the vertical drift caused by the *** occurred intermittently after 13:00 UT following the arrival of the tropospheric Lamb *** examine the causal mechanism for the intermittence,we also included data of horizontal winds in the mesosphere and lower thermosphere region recorded by the meteor radars at Wuhan and Mohe in this *** wind disturbances with periods of~20 hours contributed to the formation of the layer in the nighttime on January 15.

关键词： sporadic E Tonga eruptions neutral wind disturbances

Mechanism of AsperosaponinⅥRelated to EGFR/MMP9/AKT/PI3K Pathway in Treatment of Rheumtoid Arthritis

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Chinese Journal of Integrative Medicine 2025年第2期31卷 131-141页

作者： LUO jin-fang yu Yang LIU Jian-xin School of Basic Medicine Guizhou University of Traditional Chinese MedicineGuiyang(550025)China Sino-Pakistan Center on Traditional Chinese Medicine China-Pakistan International Science and Technology Innovation Cooperation Base for Ethnic Medicine Development in Hunan ProvinceSchool of Pharmaceutical SciencesHunan University of MedicineHuaihua CityHunan Province(418000)China

Objective:To explore the mechanism of action of asperosaponinⅥ(AⅥ)in the treatment of rheumatoid arthritis(RA)and validate it in ex vivo experiments using network pharmacology and molecular docking ***:The predicted targets of AⅥwere obtained from PharmMaper,UniProt and Swiss Target Prediction platforms,the disease targets were collected from Online Mendelian Inheritance in Man,Therapeutic Target Database and Gene Cards databases,the intersection targets of AⅥand RA were obtained from Venny 2.1.0,and the protein-protein interaction(PPI)network was obtained from STRING database,which was analyzed by Cytoscape software and screened to obtain the core *** software was used to analyze PPI network and screen the core *** on the Database for Annotation,Visualization and Integrated Discovery database,Gene Ontology functional and Kyoto Encyclopedia of Genes and Genomes pathway enrichment analysis were performed,and Cytoscape software was used to construct the"DiseasePathway-Target-Drug"network,which was finally verified by molecular docking and animal ***:Network pharmacological studies showed that AⅥwas able to modulate 289 targets,with 102 targets for the potential treatment of RA,with the core pathway being the AKT/PI3K signaling pathway,and the core targets being the epidermal growth factor receptor(EGFR)and matrix metalloproteinase 9(MMP9).Molecular docking results showed that AⅥcould produce strong binding with both of the 2 core *** vitro cellular experiments showed that AⅥreduced nitric oxide,prostaglandin E_2,tumor necrosis factor-alpha(TNF-α),interleukin-6(IL-6),and IL-1βlevels(P<0.05)and inhibited cyclooxygenase-2,nitric oxide synthase,EGFR,MMP9,phosphorylated phosphoinositide 3-kinase(p-PI3K),and phosphorylated serine-threonine kinase(p-AKT)proteins(P<0.05).The results of in vivo studies showed that AⅥimproved RA score and foot swelling thickness and decreased TNF-α,IL-6,p-PI3K and p-AKT levels in RA rat

关键词： inflammation rheumatoid arthritis network pharmacology asperosaponinⅥ EGFR/MMP9/AKT/PI3K pathway

Pyrimidine derivative as eco-friendly corrosion inhibitor for nickel−aluminum bronze in seawater

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中国有色金属学报 2025年第1期35卷 207-224页

作者： jin-yu PI Qi WANG Chao-yang FU Key Laboratory of Material Chemistry for Energy Conversion and Storage Ministry of EducationHubei Key Laboratory of Materials Chemistry and Service FailureSchool of Chemistry and Chemical EngineeringHuazhong University of Science and TechnologyWuhan 430074China

A pyrimidine derivative,6-phenyl-2-thiouracil(PT),was synthesized for developing a corrosion inhibitor(CI)applied in the protection of the nickel−aluminum bronze(NAB)in *** anti-corrosion effect of PT was evaluated by the mass loss experiment,electrochemical tests and surface *** results show that PT exhibits excellent inhibition performance and the maximum inhibition efficiency of PT reaches 99.6%.The interaction mechanism was investigated through X-ray photoelectron spectroscopy(XPS)and molecule dynamics simulation based on the density functional theory(DFT).The S-Cu,Al-N and Cu-N bonds are formed by the chemical interactions,leading to the adsorption of PT on the NAB *** diffusion of corrosive species is hindered considerably by the protective PT film with composition of(PT-Cu)_(ads)and(PT-Al)_(ads)on the PT/NAB *** degree of suppression is increased with the addition of more PT molecules.

关键词： nickel−aluminum bronze corrosion inhibitor diffusion coefficient adsorption seawater

Leaching of WO_(3)from sulfuric acid converted product of scheelite in NH_(3)·H_(2)O−NH_(4)HCO_(3)solution

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中国有色金属学报 2025年第1期35卷 326-337页

作者： Lei-ting SHEN yu LIU Juan-lang GUO Qiu-sheng ZHOU Tian-gui QI Zhi-hong PENG gui-hua LIU Xiao-bin LI School of Metallurgy and Environment Central South UniversityChangsha 410083China

The leaching of sulfuric acid converted product of scheelite in NH_(3)·H_(2)O−NH_(4)HCO_(3)solution was systemically studied to improve sulfuric acid conversion−ammonium salts leaching technology route for ammonium paratungstate *** results showed that the WO_(3)leaching efficiency was about 99%under optimal conditions of 350 r/min,liquid-to-solid ratio of 3 mL/g,1 mol/L NH_(4)HCO_(3),4 mol/L NH_(3)·H_(2)O,25℃,and 15 *** the leaching,CaSO_(4)almost had no change and was still in a banding or rod-like shape in short leaching time,while conglobate CaCO_(3)was gradually formed on the CaSO_(4)surface.A secondary reaction might occur between CaSO_(4)and WO_(4)^(2−),which could be restrained by a certain amount of CO_(3)^(2−)in the *** was no CaCO_(3)phase determined by XRD in leaching residue of converted product for scheelite concentrate under optimal conditions,which was different from that for synthetic *** leaching process could be explained by neutralization reaction of H_(2)WO_(4)and solid transformation of CaSO_(4)in NH_(3)·H_(2)O−NH_(4)HCO_(3)solution.

关键词： tungstic acid calcium sulfate leaching mechanism calcium carbonate ammonium tungstate