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Dissolution kinetics and reaction mechanism of Al_(2)O_(3) in molten CaF_(2)-CaO-Al_(2)O_(3) slag

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Journal of Iron and Steel Research International 2024年第4期31卷 861-869页

作者： yao-xin Du yan-wu Dong Zhou-hua jiang Ganna Stovpchenko yu-shuo Li Jun Huang Xin-wei Wang yu-xiao Liu School of Metallurgy Northeastern UniversityShenyang 110819LiaoningChina Key Laboratory of ecological Metallurgy of Multimetallic Mineral Northeastern UniversityShenyang 110819LiaoningChina State Key Laboratory of Rolling and Automation Northeastern UniversityShenyang 110819LiaoningChina e.O.Paton electric Welding Institute of the National Academy of Science of Ukraine Kiev 03115Ukraine

The dissolution behavior of Al_(2)O_(3) in molten CaF_(2)-CaO-Al_(2)O_(3) slag,a basic slag system of electroslag remelting process,was investigated by rotating cylinder method using corundum rods to simulate Al_(2)O_(3) inclusions in *** experimental results show that the dissolution rate of Al_(2)O_(3);rods in CaF_(2)-CaO-Al_(2)O_(3) slag increases with the increase in rotating speed and temperature,and the rate-controlling step is the mass transfer in the *** dissolution rate of Al_(2)O,in CaF_(2)-CaO-Al_(2)O_(3) slag increases with the increase in the ratio of CaO to Al_(2)O_(3),which is due to the increase in dissolution driving force and the decrease in slag *** apparent activation energy of the mass transfer of AlOs in slag C is calculated to be 222.86 kJ mol^(-1).During the dissolution of Al_(2)0,inclusions in the slag,it reacts with F in liquid slag at first,then reacts with CaO to form the intermediate compounds of xCaO-yAl_(2)O_(3) system,and finally dissolves in molten *** dissolution rate of Al_(2)O_(3) inclusions in CaF_(2)-CaO-Al_(2)O_(3) slag for electroslag remelting is positively correlated with the ratio of the dissolution driving force and slag viscosity,and the correlation coeficient is 2.487×10^(-11).

关键词： Inclusion electroslag remelting Mass transfer:Dissolution rate-Dissolution driving force

Highly efficient photo-thermal synergistic catalysis of CO_(2)methanation over La_(1-x)Ce_(x)NiO_(3)perovskite-catalyst

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Nano Research 2024年第9期17卷 7945-7956页

作者： Ting Li Zhen-yu Zhang De-Cun Luo Bo-yu Xu Rong-jiang Zhang Ji-Long yao Dan Li Tao Xie Institute of Industrial Catalysis School of Chemical Engineering and TechnologyXi’an Jiaotong UniversityXi’an 710049China

Solar-driven photo-thermal catalytic CO_(2)methanation reaction is a promising technology to alleviate the problems posed by greenhouse gases ***,designing advanced photo-thermal catalysts remains a research challenge for CO_(2)methanation *** this work,a series of ABO3(A=lanthanide,B=transition metal)perovskite catalysts with Ce-substituted LaNiO3(La_(1-x)Ce_(x)NiO_(3),x=0,0.2,0.5,0.8,1)were synthesized for CO_(2)*** La_(0.2)Ce_(0.8)NiO_(3) exhibited the highest CH_(4) formation rate of 258.9 mmol·g^(-1)·hcat-1,CO_(2)conversion of 55.4%and 97.2%CH_(4) selectivity at 300℃with the light intensity of 2.9 W·cm^(-2).Then the catalysts were thoroughly analyzed by physicochemical structure and optical properties *** partial substitution of the A-site provided more active sites for the adsorption and activation of CO_(2)/H_(2).The sources of the active sites were considered to be the oxygen vacancies(O_(v))created by lattice distortions due to different species of ions(La^(3+),Ce^(4+),Ce^(3+))and exsolved Ni0 by H_(2)*** catalysts have excellent light absorption absorbance and low electron-hole(e^(-)/h^(+))recombination rate,which greatly contribute to the excellent performance in photo-thermal synergistic catalysis(PTC)CO_(2)*** results of in situ irradiated electron paramagnetic resonance spectrometer(ISI-ePR)and ISI-X-ray photoelectron spectroscopy(XPS)indicated that the aggregation of unpaired electrons near the defects and Ni metal(from La and Ce ions to Ov and Ni0)accelerated adsorption and activation of CO_(2)/H_(2).At last,the catalyst properties and structure were correlated with the proposed reaction mechanism from the in situ diffuse reflection infrared Fourier transform spectrum(DRIFTS)*** in situ precipitation of the B-site enhanced the dispersion of Ni,while its enriched photoelectrons upon illumination further promote hydrogen *** H^(*)spillover accelerated t

关键词： photo-thermal catalysis CO_(2)methanation perovskite A-site substitution in situ diffuse reflection infrared Fourier transform spectrum(DRIFTS)

Recent advancements in thermal conductivity of magnesium alloys

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Journal of Magnesium and Alloys 2024年第5期12卷 1687-1708页

作者： Hao Lv Jun Tan Qian yuan Fanglei Wang yunxuan Zhou Quan Dong Aitao Tang Jürgen eckert Bin jiang Fusheng Pan National engineering Research Center for Magnesium Alloys College of Materials Science and EngineeringChongqing UniversityChongqing 400044China National Key Laboratory of Advanced Casting Technologies Chongqing UniversityChongqing 400044China Department of Materials Science Chair of Materials PhysicsMontanuniversität LeobenJahnstraße 12Leoben A-8700Austria erich Schmid Institute of Materials Science Austrian Academy of SciencesJahnstraße 12Leoben A-8700Austria

As highly integrated circuits continue to advance,accompanied by a growing demand for energy efficiency and weight reduction,materials are confronted with mounting challenges pertaining to thermal conductivity and lightweight *** virtue of numerous intrinsic mechanisms,as a result,the thermal conductivity and mechanical properties of the Mg alloys are often inversely related,which becomes a bottleneck limiting the application of Mg *** on several effective modification methods to improve the thermal conductivity of Mg alloys,this paper describes the law of how they affect the mechanical properties,and clearly indicates that peak aging treatment is one of the best ways to simultaneously enhance an alloy's thermal conductivity and mechanical *** the most frequently used Mg alloy,cast alloys exhibit substantial potential for achieving high thermal ***,recent reports indicate that hot deformation can significantly improve the mechanical properties while maintaining,and potentially slightly enhancing,the alloy's thermal *** presents a meaningful way to develop Mg alloys for applications in the field of small-volume heat dissipation components that require high *** comprehensive review begins by outlining standard testing and prediction methods,followed by the theoretical models used to predict thermal conductivity,and then explores the primary influencing factors affecting thermal *** review summarizes the current development status of Mg alloys,focusing on the quest for alloys that offer both high thermal conductivity and high *** concludes by providing insights into forthcoming prospects and challenges within this field.

关键词： Mg alloy Thermal conductivity Mechanical properties Solute atom Second phase

6PPD-quinone affects the photosynthetic carbon fixation in cyanobacteria by extracting photosynthetic electrons

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The Innovation 2024年第4期5卷 75-83,74页

作者： Xiuqi you Ximin Chen yi jiang Huan Chen Juan Liu Zhen Wu Weiling Sun Jinren Ni Key Laboratory of Water and Sediment Sciences Ministry of EducationCollege of Environmental Sciences and EngineeringPeking UniversityBeijing 100871China State environmental Protection Key Laboratory of All Material Fluxes in River ecosystems Beijing 100871China Department of Civil and environmental engineering The Hong Kong Polytechnic UniversityHung HomKowloonHong Kong 999077China Department of environmental engineering and earth Sciences Clemson UniversityClemsonSC 29634USA

Photosynthetic carbon fixation by cyanobacteria plays a pivotal role in the global carbon cycle but is threatened by environmental *** date,the impact of quinones,with electron shuttling properties,on cyanobacterial photosynthesis is ***,we present the first study investigating the effects of an emerging quinone pollutant,i.e.,6PPD-Q(N-(1,3-dimethylbutyl)-N0-phenyl-p-phenylenediamine-quinone),on the cyanobacterium Synechocystis *** a 400-generation exposure *** *** distinct sequential phases,including hormesis,toxicity,and eventual recovery,throughout this *** evidence,including results of thylakoid membrane morphological and photosynthetic responses,carbon fixation rate,and key gene/protein analyses,strongly indicates that 6PPD-Q is a potent disruptor of photosynthesis.6PPD-Q accepts photosynthetic electrons at the plastoquinone QB site in photosystem II(PSII)and the phylloquinone A1 site in PSI,leading to a sustained decrease in the carbon fixation of cyanobacteria after an ephemeral *** work revealed the specific mechanism by which 6PPD-Q interferes with photosynthetic carbon fixation in cyanobacteria,which is highly important for the global carbon cycle.

关键词： carbon extracting sustained

A multi-objective optimization based on machine learning for dimension precision of wax pattern in turbine blade manufacturing

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Advances in Manufacturing 2024年第3期12卷 428-446页

作者： Jing Dai Song-Zhe Xu Chao-yue Chen Tao Hu San-San Shuai Wei-Dong Xuan jiang Wang Zhong-Ming Ren State Key Laboratory of Advanced Special Steels School of Materials Science and EngineeringShanghai UniversityShanghai200444People’s Republic of China

Wax pattern fabrication in the investment casting of hollow turbine blades directly determines the dimension accuracy of subsequent casting,and therefore significantly affects the quality of final *** this work,we develop a machine learning-based multi-objective optimization framework for improving dimension accuracy of wax pattern by optimizing its process *** consider two optimization objectives on the dimension of wax pattern,i.e.,the surface warpage and core *** active learning of Bayesian optimization is employed in data sampling to determine process parameters,and a validated numerical model of injection molding is used to compute objective results of dimension under varied process *** collected dataset is then leveraged to train different machine learning models,and it turns out that the Gaussian process regression model performs best in prediction accuracy,which is then used as the surrogate model in the optimization framework.A genetic algorithm is employed to produce a non-dominated Pareto front using the surrogate model in searching,followed by an entropy weight method to select the most optimal solution from the Pareto *** optimized set of process parameters is then compared to empirical parameters obtained from previous trial-and-error experiments,and it turns out that the maximum and average warpage results of the optimized solution decrease 26.0%and 20.2%,and the maximum and average errors of wall thickness compared to standard part decrease from 0.22 mm and 0.0517 mm using empirical parameters to 0.10 mm and 0.0356 mm using optimized parameters,*** framework is demonstrated capable of addressing the challenge of dimension control arising in the wax pattern production,and it can be reliably deployed in varied types of turbine blades to significantly reduce the manufacturing cost of turbine blades.

关键词： Hollow turbine blade Wax pattern fabrication Dimension control Multi-objective optimization Machine learning Numerical simulation

The new kid on the block in insect pest management:sprayable RNAi goes commercial

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Science China(Life Sciences) 2024年第8期67卷 1766-1768页

作者： Junjie yan Ralf Nauen Stuart Reitz Andrei Alyokhin jiang Zhang David Mota-Sanchez yonggyun Kim Subba Reddy Palli Silvia I.Rondon Brian A.Nault Juan Luis Jurat-Fuentes Michael S.Crossley William e.Snyder Angharad M.R.Gatehouse Myron P.Zalucki Bruce e.Tabashnik yulin Gao State Key Laboratory for Biology of Plant Disease and Insect Pests Institute of Plant ProtectionChinese Academy of Agricultural SciencesBeijing 100193China Bayer AG Crop Science DivisionR&DPest ControlMonheim 40789Germany Department of Crop and Soil Science Oregon State UniversityOntario 97914USA School of Biology and ecology University of MaineOrono 04469USA Shenzhen Branch Guangdong Laboratory of Lingnan Modern AgricultureKey Laboratory of Synthetic BiologyMinistry of Agriculture and Rural AffairsAgricultural Genomics Institute at ShenzhenChinese Academy of Agricultural SciencesShenzhen 518000China Department of entomology Michigan State UniversityEast Lansing 48864USA Department of Plant Medicals Andong National UniversityAndong 36729Republic of Korea Department of entomology University of KentuckyLexington 40503USA Oregon State University Oregon Integrated Pest Management CenterCorvallis 97838USA Department of entomology Cornell UniversityCornell AgriTechGeneva 14456USA Department of entomology and Plant Pathology University of TennesseeKnoxville 37996USA Department of entomology and Wildlife ecology University of DelawareNewark 19716USA Department of entomology University of GeorgiaAthensGeorgia 30602USA School of Natural and environmental Sciences Newcastle UniversityNewcastle upon TyneNE17RUUK School of the environment University of QueenslandBrisbane 4072Australia Shandong engineering Research Center for environment-Friendly Agricultural Pest Management College of Plant Health and MedicineQingdao Agricultural UniversityQingdao 266109China Department of entomology University of ArizonaTucson 85721USA National Center of excellence for Tuber and Root Crop Research Chinese Academy of Agricultural SciencesBeijing 100081China

Insect pest damage to crops is a threat to global food security(Tilman et al.,2011).Climate change,the evolution of insecticide resistance,and the phasing out of insecticides due to environmental and safety concerns exacerbate this *** urgently need safe and effective crop protection tools to sustainably generate yields that meet ever-increasing global demand.

关键词： crops damage pest

Current and future research directions in cellular metabolism of colorectal cancer:A bibliometric analysis

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World Journal of Gastrointestinal Oncology 2024年第8期16卷 3732-3737页

作者： Bo-Wen jiang Xiu-Hua Zhang Rui Ma Wen-yu Luan yan-Dong Miao Department of emergency Yantai Affiliated Hospital of Binzhou Medical UniversityThe Second Medical College of Binzhou Medical UniversityYantai 264100Shandong ProvinceChina Department of Oncology Laiyang Central HospitalYantai 265200Shandong ProvinceChina Department of Cancer Center Yantai Affiliated Hospital of Binzhou Medical UniversityThe Second Medical College of Binzhou Medical UniversityYantai 264100Shandong ProvinceChina

The primary aim of this study was to analyze the evolving trends and key focal points in research on cellular metabolism of colorectal cancer(CRC).Relevant publications on cellular metabolism in CRC were sourced from the Science Citation Index expanded within the Web of Science Core Collection *** analysis and visualization were conducted using VOSviewer(version 1.6.18)software and CiteSpace 6.1.R6(64-bit)Basic.A comprehensive compilation of 4722 english-language publications,covering the period from January 1,1991 to December 31,2022,was carefully identified and included in the *** the authors,“Ogino,Shuji”contributed the most publications in this field,while“Giovannucci,e”garnered the highest number of *** journal“Cancer Research”ranked first in both publication volume and ***,“Shanghai Jiao Tong University”emerged as the top contributor in terms of published articles,while“Harvard University”led in citation *** country-based analysis,the United States held the top position in both publication output and citations,closely followed by *** increasing recognition of the significance of cellular metabolism in CRC underscores its potential for novel therapeutic approaches aimed at improving CRC management and prognosis.

关键词： Cellular metabolism Colorectal cancer Bibliometric analysis Metabolic reprogramming Cellular metabolism

High-Performance and Large-Area Inverted Perovskite Solar Cells Based on NiO_(x) Films enabled with A Novel Microstructure-Control Technology

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energy & environmental Materials 2024年第1期7卷 153-159页

作者： Guibin Shen Xin Li yuqin Zou Hongye Dong Dongping Zhu yanglin jiang Xin Ren Ng Fen Lin Peter Müller-Buschbaum Cheng Mu Key Laboratory of Advanced Light Conversion Materials and Biophotonics Department of ChemistryRenmin University of ChinaBeijing 100872China Solar energy Research Institute of Singapore(SeRIS) National University of SingaporeSingapore 117574Singapore Physik-Department Lehrstuhl für Funktionelle MaterialienTechnische Universität MünchenJames-Franck-Straße 185748Garching Germany Heinz Maier-Leibnitz Zentrum(MLZ) Technische Universität MünchenLichtenbergstr.185748Garching Germany

The improvement in the efficiency of inverted perovskite solar cells(PSCs)is significantly limited by undesirable contact at the NiO_(x)/perovskite *** this study,a novel microstructure-control technology is proposed for fabrication of porous NiO_(x)films using Pluronic P123 as the structure-directing agent and acetylacetone(AcAc)as the coordination *** synthesized porous NiO_(x)films enhanced the hole extraction efficiency and reduced recombination defects at the NiO_(x)/perovskite ***,without any modification,the power conversion efficiency(PCe)of the PSC with MAPbl_(3)as the absorber layer improved from 16.50%to 19.08%.Moreover,the PCe of the device composed of perovskite Cs0.05(MA_(0.15)FA_(0.85))_(0.95)Pb(I_(0.85)Br_(0.15))_(3)improved from 17.49%to 21.42%.Furthermore,the application of the fabricated porous NiO_(x)on fluorine-doped tin oxide(FTO)substrates enabled the fabrication of large-area PSCs(1.2 cm^(2))with a PCe of 19.63%.This study provides a novel strategy for improving the contact at the NiO_(x)/perovskite interface for the fabrication of high-performance large-area perovskite solar cells.

关键词： interfacial contact inverted and large-area perovskite solar cells photovoltaic materials porous NiO_(x)films renewable energy

Isolation and microbial transformation of tea sapogenin from seed pomace of Camellia oleifera with anti-inflammatory effects

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Chinese Journal of Natural Medicines 2024年第3期22卷 280-288页

作者： SHeN Pingping jiang Xuewa ZHANG Jingling WANG Jiayi Raj Richa LI Guolong Ge Haixia WANG Weiwei yU Boyang ZHANG Jian State Key Laboratory of Natural Medicines China Pharmaceutical UniversityNanjing 210009China Co-construction Collaborative Innovation Center for Chinese Medicine Resources Industrialization by Shaanxi&education Ministry Shaanxi Province Key Laboratory of New Drugs and Chinese Medicine Foundation ResearchShaanxi University of Chinese MedicineXianyang 712046China School of Life Sciences Huzhou UniversityHuzhou 313000China Nanjing Hospital of Chinese Medicine Affiliated to Nanjing University of Chinese Medicine Nanjing 210046China jiangsu Key Laboratory of TCM evaluation and Translational Research China Pharmaceutical UniversityNanjing 211198China

In the current study,tea saponin,identified as the primary bioactive constituent in seed pomace of Camellia oleifera Abel.,was meticulously extracted and hydrolyzed to yield five known sapogenins:16-O-tiglogycamelliagnin B(a),camelliagnin A(b),16-O-angeloybarringtogenol C(c),theasapogenol e(d),theasapogenol F(e).Subsequent biotransformation of compound a facilitated the isolation of six novel metabolites(a1−a6).The anti-inflammatory potential of these compounds was assessed using pathogenassociated molecular patterns(PAMPs)and damage-associated molecular patterns molecules(DAMPs)-mediated cellular inflammation ***,compounds b and a2 demonstrated significant inhibitory effects on both lipopolysaccharide(LPS)and high-mobility group box 1(HMGB1)-induced inflammation,surpassing the efficacy of the standard anti-inflammatory agent,***,compounds d,a3,and a6 selectivity targeted endogenous HMGB1-induced inflammation,showcasing a pronounced *** results underscore the therapeutic promise of *** seed pomace-derived compounds as potent agents for the management of inflammatory diseases triggered by infections and tissue damage.

关键词： Camellia oleifera Seed pomace Tea sapogenin Microbial transformation Damage-associated molecular patterns and Pathogen-associated molecular patterns Anti-inflammatory activity