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The deteriorated degradation resistance of Mg alloy microtubes for vascular stent under the coupling effect of radial compressive stress and dynamic medium

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Journal of Magnesium and Alloys 2024年第2期12卷 573-585页

作者： Mengyao Liu Yabo Zhang Qingyuan Zhang Yan Wang Di Mei yufeng sun Liguo Wang Shijie Zhu Shaokang Guan School of Materials Science and Engineering Zhengzhou UniversityZhengzhou 450001China Henan Key Laboratory of Advanced Magnesium Alloys Zhengzhou 450002China Key Laboratory of Advanced Materials Processing&Mold Ministry of Education Zhengzhou 450002China

The degradation of Mg alloys relates to the service performance of Mg alloy biodegradable implants.In order to investigate the degradation behavior of Mg alloys as vascular stent materials in the near service environment,the hot-extruded fine-grained Mg-Zn-Y-Nd alloy microtubes,which are employed to manufacture vascular stents,were tested under radial compressive stress in the dynamic Hanks'Balanced Salt Solution(HBSS).The results revealed that the high flow rate accelerates the degradation of Mg alloy microtubes and its degradation is sensitive to radial compressive stress.These results contribute to understanding the service performance of Mg alloys as vascular stent materials.

关键词： Mg alloy Microtubes Degradation behavior Radial compressive stress Dynamic conditions

Covalent organic framework/carbon black/molecularly imprinted polydopamine composites for the selective recognition and electrochemical detection of ciprofloxacin

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Food Science and Human Wellness 2024年

作者： yufeng sun Yongfeng Chen Xiaomin Pang Geoffrey I.N.Waterhouse Xuguang Qiao Zhixiang Xu Key Laboratory of Food Processing Technology and Quality Control in Shandong Province College of Food Science and Engineering Shandong Agricultural University School of Chemical Sciences The University of Auckland

In this work， a novel electrochemical sensor based on covalent organic framework@carbon black@molecularly imprinted polydopamine （COF@CB@MPDA） was developed for selective recognition and determination of ciprofloxacin （CF）. COF@CB@MPDA possessed good water dispersibility and was synthesized by the self-polymerization of dopamine under alkaline conditions in the presence of the COF， CB and CF. The high surface area COF enhanced the adsorption of CF， whilst CB gave the composites high electrical conductivity to improve the sensitivity of the proposed COF@CB@MPDA/GCE sensor. The specific recognition of CF by COF@CB@MPDA involved hydrogen bonding and van der Waals interactions. Under optimized conditions， the sensor showed a good linear relationship with CF concentration over the range 5.0 × 10-7mol/L and 1.0 × 10-4mol/L， with a limit of detection （LOD） of 9.53 × 10-8mol/L. Further， the developed sensor exhibited high selectivity， repeatability and stability for CF detection in milk and milk powders. The method used to fabricate the COF@CB@MPDA/GCE sensor could be easily adapted for the selective recognition and detection of other antibacterial agents and organic pollutants in the environment.

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Bifunctional ZrO@ZIF-90 nanozyme with high phosphohydrolase activity for sensitive electrochemical detection of methyl parathion

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Food Science and Human Wellness 2024年

作者： Xiaomin Pang Geoffrey I.N.Waterhouse Ruiqiang Wang Xuguang Qiao yufeng sun Zhixiang Xu Key Laboratory of Food Nutrition and Healthy in Universities of Shandong College of Food Science and Engineering Shandong Agricultural University School of Chemical Sciences the University of Auckland Shandong Cayon Testing Co. Ltd.

In this work， a novel bifunctional zirconium dioxide @ zeolitic imidazolate framework-90 (ZrO2@ZIF-90) nanozyme was successfully developed for the catalytic degradation and electrochemical detection of methyl parathion (MP). The ZrO2@ZIF-90 nanozyme with phosphatase hydrolysis activity can convert MP into p-nitrophenol (p-NP). The addition of ZrO2riched in Lewis acid Zr(IV) sites significantly enhanced the phosphatase hydrolysis activity of ZIF-90. ZrO2@ZIF-90 also displayed satisfactory electrocatalytic performance on account of the high surface area， high porosity and powerful enrichment ability of the ZIF-90 and the excellent ion transfer capacity of ZrO2. A ZrO2@ZIF-90 nanozyme modified glassy carbon electrode (ZrO2@ZIF-90/GCE) was then fabricated to analyze p-NP formed through MP degradation. Under the optimized conditions， the developed sensor displayed satisfactory analytical performance with a low limit of detection of 0.53 μmol L-1and two wide linear ranges (3-10 μmol L-1and 10-200 μmol L-1). ZrO2@ZIF-90 nanozyme accomplished to the degradation and electrochemical detection of MP in river water and spiked fruits. This study identifies a promising new strategy for the design of bifunctional nanozymes for the detection of environmental hazards.

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A highly sensitive electrochemical sensing platform based on Zn-CuGaO@CMK-3 signal amplification for simultaneous detection of the sunset yellow and tartrazine in foods

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Food Science and Human Wellness 2024年

作者： Yongfeng Chen Rui Gao yufeng sun Ruiqiang Wang Geoffrey I.N.Waterhouse Xuguang Qiao Zhixiang Xu College of Food Science and Engineering Shandong Agricultural University Shandong Cayon Testing Co. LTD. School of Chemical Sciences The University of Auckland

In this work， a highly sensitive electrochemical sensor based on Zn-doped copper gallium oxide@ordered mesoporous carbon (Zn-CuGaO2@CMK-3) for signal amplification was successfully developed for the simultaneous detection of sunset yellow （SY） and tartrazine （TZ） in foods. Compared with CuGaO2@CMK-3， Zn-CuGaO2@CMK-3 offered enhanced conductivity and catalytic properties owing to the improved carrier density， which was beneficial to the electrooxidation of SY and TZ. Under the optimal testing conditions， the constructed Zn-CuGaO2@CMK-3/GCE sensor offered a wide linear concentration range （0.25 to 100.00 μmol/L） for the detection of both SY and TZ. The limits of detection for SY and TZ were 0.044 μmol/L and 0.059 μmol/L， respectively. Recovery experiments were performed in milk， white vinegar and biscuit samples， yielding satisfactory recoveries （82.70%-114.80%）. Furthermore， the sensor was successfully applied to the determination of the SY and TZ residues in two kinds of carbonated drinks， and the results were nearly consistent with those detected by the high performance liquid chromatography （HPLC） method （P＞0.05）.

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Yanggan Jiangmei Formula alleviates hepatic inflammation and lipid accumulation in non-alcoholic steatohepatitis by inhibiting the NF-κB/NLRP3 signaling pathway

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Chinese Journal of Natural Medicines 2024年第3期22卷 224-234页

作者： WU Yuanyuan ZHOU Jingwen ZUO Xinchen KUANG yufeng sun Lixia ZHANG Xiaolong The First Clinical Medical College Nanjing University of Chinese MedicineNanjing 210023China The Affiliated Hospital of Nanjing University of Chinese Medicine Jiangsu Province Hospital of Chinese MedicineNanjing 210029China

The role of NF-κB and the NLRP3 inflammasome in the chronic inflammatory microenvironment of non-alcoholic steatohepatitis(NASH)has been posited as crucial.The Yanggan Jiangmei Formula(YGJMF)has shown promise in ameliorating hepatic steatosis in NASH patients,yet its pharmacological mechanisms remain largely unexplored.This study was conducted to investigate the efficacy of YGJMF in NASH and to elucidate its pharmacological underpinnings.To simulate NASH both in vivo and in vitro,high-fat-diet(HFD)rats and HepG2 cells stimulated with free fatty acids(FFAs)were utilized.The severity of liver injury and lipid deposition was assessed using serum indicators,histopathological staining,micro-magnetic resonance imaging(MRI),and the liver-tomuscle signal intensity ratio(SIRL/M).Furthermore,a combination of enzyme-linked immunosorbent assay(ELISA),immunohistochemistry(IHC),immunofluorescence,real-time quantitative polymerase chain reaction(RT-qPCR),and Western blotting analyses was employed to investigate the NF-κB/NLRP3 signaling pathway and associated cytokine levels.The results from liver pathology,MRI assessments,and biochemical tests in rat models demonstrated YGJMF’s significant effectiveness in reducing liver damage and lipid accumulation.Additionally,YGJMF markedly reduced hepatocyte inflammation by downregulating inflammatory cytokines in both liver tissue and serum.Furthermore,YGJMF was found to disrupt NF-κB activation,consequently inhibiting the assembly of the NLRP3 inflammasome in both the in vitro and in vivo models.The preliminary findings of this study suggest that YGJMF may alleviate hepatic steatosis and inhibit the NF-κB/NLRP3 signaling pathway,thereby exerting anti-inflammatory effects in NASH.

关键词： Non-alcoholic steatohepatitis Nuclear factor kappa B NLRP3 inflammasome Yanggan Jiangmei Formula

Artificial intelligence optimization and controllable slow-release iron sulfide realizes efficient separation of copper and arsenic in strongly acidic wastewater

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Journal of Environmental Sciences 2024年第5期139卷 293-307页

作者： Xingfei Zhang Chenglong Lu Jia Tian Liqiang Zeng yufeng Wang Wei sun Haisheng Han Jianhua Kang School of Minerals Processing and Bioengineering Central South UniversityChangsha 410083China Centre for Mined Land Rehabilitation Sustainable Minerals InstituteThe University of QueenslandBrisbane 4072Australia

Iron sulfide(FeS)is a promising material for separating copper and arsenic from strongly acidic wastewater due to its S^(2-)slow-release effect.However,uncertainties arise because of the constant changes in wastewater composition,affecting the selection of operating parameters and FeS types.In this study,the aging method was first used to prepare various controllable FeS nanoparticles to weaken the arsenic removal ability without affecting the copper removal.Orthogonal experiments were conducted,and the results identified the Cu/As ratio,H_(2)SO_(4) concentration,and FeS dosage as the three main factors influencing the separation efficiency.The backpropagation artificial neural network(BP-ANN)model was established to determine the relationship between the influencing factors and the separation efficiency.The correlation coefficient(R)of overall model was 0.9923 after optimizing using genetic algorithm(GA).The BP-GA model was also solved using GA under specific constraints,predicting the best solution for the separation process in real-time.The predicted results show that the high temperature and long aging time of FeS were necessary to gain high separation efficiency,and the maximum separation factor can reached 1,400.This study provides a suitable sulfurizing material and a set of methods and models with robust flexibility that can successfully predict the separation efficiency of copper and arsenic from highly acidic environments.

关键词： FeS nanoparticles Aging Sulfide precipitation Orthogonal experiment Artificial neural network Prediction

Neural Dynamics for Cooperative Motion Control of Omnidirectional Mobile Manipulators in the Presence of Noises: A Distributed Approach

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IEEE/CAA Journal of Automatica Sinica 2024年第7期11卷 1605-1620页

作者： yufeng Lian Xingtian Xiao Jiliang Zhang Long Jin Junzhi Yu Zhongbo sun the Department of Control Engineering Changchun University of TechnologyChangchun 130012China IEEE the College of Information Science and Engineering Northeastern UniversityShenyang 110819 the National Mobile Communications Research Laboratory Southeast UniversityNanjing 210096China the School of Information Science and Engineering Lanzhou UniversityLanzhou 730000China the State Key Laboratory for Turbulence and Complex Systems Department of Advanced Manufacturing and RoboticsCollege of EngineeringPeking UniversityBeijing 100871China

This paper presents a distributed scheme with limited communications, aiming to achieve cooperative motion control for multiple omnidirectional mobile manipulators(MOMMs).The proposed scheme extends the existing single-agent motion control to cater to scenarios involving the cooperative operation of MOMMs. Specifically, squeeze-free cooperative load transportation is achieved for the end-effectors of MOMMs by incorporating cooperative repetitive motion planning(CRMP), while guiding each individual to desired poses. Then, the distributed scheme is formulated as a time-varying quadratic programming(QP) and solved online utilizing a noise-tolerant zeroing neural network(NTZNN). Theoretical analysis shows that the NTZNN model converges globally to the optimal solution of QP in the presence of noise. Finally, the effectiveness of the control design is demonstrated by numerical simulations and physical platform experiments.

关键词： Cooperative motion control noise-tolerant zeroing neural network(NTZNN) omnidirectional mobile manipulator(OMM) repetitive motion planning

Ultra-high specific surface area activated carbon from Taihu cyanobacteria via KOH activation for enhanced methylene blue adsorption

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Chinese Journal of Chemical Engineering 2024年第3期67卷 106-116页

作者： Yifang Mi Wenqiang Wang Sen Zhang Yalong Guo yufeng Zhao Guojin sun Zhihai Cao Key Laboratory of Advanced Textile Materials and Manufacturing Technology and Engineering Research Center for Eco-Dyeing&Finishing of Textiles Ministry of EducationZhejiang Provincial Engineering Research Center for Green and Low-carbon Dyeing&FinishingZhejiang Sci-Tech UniversityHangzhou 310018China Key Laboratory for Technology in Rural Water Management of Zhejiang Province Zhejiang University of Water Resources and Electric PowerHangzhou 310018China

Cyanobacteria-based activated carbon(CBAC)was successfully prepared by pyrolysis-activation of Taihu cyanobacteria.When the impregnation ratio and activated temperature were 2 and 800-C,respectively,the optimal CBACs possessed an ultra-high specific surface(2178.90 m^(2)·g^(-1))and plenty of micro-and meso-pores,as well as a high pore volume(1.01 cm^(3)·g^(-1)).Ascribed to ultra-high surface area,π-π interaction,electrostatic interaction,as well as hydrogen-bonding interactions,the CBACs displayed huge superiority in efficient dye removal.The saturated methylene blue adsorption capacity by CBACs could be as high as 1143.4 mg·g^(-1),superior to that of other reported biomass-activated carbons.The adsorption was endothermic and modeled well by the pseudo-second-order kinetic,intra-particle diffusion,and Langmuir models.This work presented the effectiveness of Taihu cyanobacteria adsorbent ascribed to its super large specific surface area and high adsorption ability.

关键词： Activated carbon Biomass Dye adsorption Taihu cyanobacteria

Cobalt-Catalyzed Difunctionalization of Styrenes via Ligand Relay Catalysis

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Chinese Journal of Chemistry 2023年第24期41卷 3633-3638页

作者： Bingcheng Wang yufeng sun Zhan Lu Department of Chemistry Zhejiang UniversityHangzhouZhejiang310058 China College of Chemistry Zhengzhou UniversityZhengzhouHenan450001 China

Here,we report a cobalt-catalyzed sequential dehydrogenative Heck silylation/hydroamination of styrenes with hydrosilane and diazo compound to access 1-amino-2-silyl compounds with excellent regioselectivity.This difunctionalization reaction could undergo smoothly using 1 mol%catalyst loading with good functional group tolerance.Not only di-and tri-substituted hydrosilanes,but also alkoxysilane is suitable,which does explore the scope of the family of 1-amino-2-silyl compounds.The ligand relay phenomenon between neutral tridentate NNN ligand and anionic NNN ligand is observed for the first time via absorption spectral analysis in this one-pot,two-step transformations.The primary mechanism has been proposed based on the control experiments.

关键词： Ligand relay catalysis Difunctionalization Styrene Alkoxysilane Hydroamination Diazo compounds