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Synergistically enhanced ORR and HER performance on Co-N-C coupled in-situ generated PtCo intermetallic

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Journal of Energy Chemistry 2025年第1期100卷 721-729页

作者： Guanyu luo Min Song Lulu An Xiao Huang qian Zhang Chenhao Zhang Tao Shen Shuang Wang Deli Wang Key Laboratory of Material Chemistry for Energy Conversion and Storage (Huazhong University of Science and Technology) Ministry of Education School of Chemistry and Chemical Engineering Huazhong University of Science and Technology

Integrating multi-scale sites in a composite catalyst is vital to realize efficient ***,a synergistic composite catalyst consisting of Co atomic sites and in-situ generated PtCo intermetallic compounds （IMCs）(o-PtCo@CoNC) is proposed through Co pre-anchoring and subsequent impregnation-reduction *** loading of Co atoms provides a chance for in-situ generating PtCo ordered intermetallic *** remaining Co single atoms and PtCo IMCs construct synergistic electrocatalytic *** from the ordered structure,synergistic effect of Pt Co IMCs and Co single atoms,o-PtCo@CoNC exhibits excellent electrocatalytic performance for oxygen reduction reaction （ORR） and hydrogen evolution reaction （HER） with mass activity of 1.21 A mgPt-1（at 0.9 V） and5.70 A mgPt-1（at an overpotential of 100 mV）,***,o-PtCo@CoNC delivers negligible loss of half-wave potential and overpotential during long-term stability test in acid solutions,with 13 mV decay after 50,000 potential cycles for ORR and a 2.7 mV decay after 20,000 potential cycles for *** integration strategy of single-atomic sites coupled IMCs paves the way for enhancing the activity and durability of Pt-based electrocatalysts.

关键词： Electrolytic reduction

3D打印铜电解MWNT/ABS导电复合材料阴极与性能研究

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有色金属（冶炼部分） 2017年第10期 23-27页

作者：诸葛祥群向利李前进罗志虹罗鲲广西有色金属及特色材料加工省部共建国家重点实验室培育基地广西桂林541004 广西有色金属隐伏矿床勘查及材料开发协同创新中心广西桂林541004

采用自制MWNT/ABS导电纳米复合材料耗材,借助3D打印方法制备了铜电解精炼阴极板及配套电解槽,开展替代钛种板的研究。采用硫酸体系电解液进行电解精炼试验,得到致密均匀的面心立方晶系电解铜,沉积物剥离方便,且阴极板及电解槽结构具有... 详细信息

采用自制MWNT/ABS导电纳米复合材料耗材,借助3D打印方法制备了铜电解精炼阴极板及配套电解槽,开展替代钛种板的研究。采用硫酸体系电解液进行电解精炼试验,得到致密均匀的面心立方晶系电解铜,沉积物剥离方便,且阴极板及电解槽结构具有可设计性。循环伏安分析表明,Cu2+在导电复合材料上可正常形核与生长,添加微量的明胶以及硫脲后电解铜的表面更加均匀平整,晶粒尺寸变小。

关键词： 3D打印导电复合材料铜电解精炼阴极

Regulation of LDL receptor expression by the effect of curcumin on sterol regulatory element pathway

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Regulation of LDL receptor expression by the effect of curcu...

高效液相色谱法同时测定心动颗粒中阿魏酸和欧前胡素的含量

华东六省一市生物化学与分子生物学学会2006年学术交流会

作者： Chunlei FAN,Xingde WO,Xiaobing DOU,Li Xu,Ying qian,Yan luo, jin YAN (Life Science Department,Zhejiang Chinese Medical University, 310053, China Basic Medicine Department,Hangzhou Teachers College, 310053, China

To investigate the molecular mechanisms of the effect of curcumin on up-regulation of LDL receptor expression, a sterol regulatory report system was established in Xenopus laevis oocytes by microinjection of a plasmid pLXRN-4SRE-fPA, in which green fluorescence protein (GFP) gene was constructed downstream from the sterol regulatory element-1 (SRE-1), in the nucleus of the oocytes. The oocytes were treated with different kinds of natural medicines:curcumin, tea polyphenols, tanshinone, ligustrazine, ginkgolide,astragalosides. The expression of GFP was induced only by curcumin. In addition, it was also proved that the curcumin can increase the expression of functional LDL receptors in human liver hepatoma cell line HepG2. In conclusion, curcumin may up-regulate the expression of LDL receptor by its effect on SRE pathway.

关键词： Xenopus laevis oocytes sterol regulatory element-1 gene expression low-density lipoprotein receptor green fluorescence protein HepG2

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食品与药品 2017年第4期19卷 260-263页

作者：郭征兵邱慧徐倩罗金根南昌市洪都中医院江西南昌330000 南昌市第六医院江西南昌330000

目的建立高效液相色谱法(HPLC)同时测定心动颗粒中阿魏酸和欧前胡素含量。方法色谱柱为Welchrom@C18反相色谱柱(4.6 mm×250 mm,5μm);流动相为乙腈(A)-水(10 mmol/L磷酸)(B),梯度洗脱:0~3.5 min,15%A;3.5~12 min,15%A→25%A;12~21 min,25%A);流速1.0 m L/min;检测波长310 nm;柱温35℃。结果阿魏酸和欧前胡素的质量浓度分别在5.19~51.90μg/m L和5.20~52.05μg/m L浓度范围内呈良好的线性关系(r2>0.9995),平均回收率分别为98.34%和98.06%,RSD分别为1.02%和0.96%(n=6)。结论本测定方法简便、准确,稳定性、重复性好,适用于心动颗粒中阿魏酸和欧前胡素的含量测定。

关键词：高效液相色谱法心动颗粒阿魏酸欧前胡素含量测定

Revolutionizing breast cancer detection:Advances in fluorescent probe technology

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Nano Research 2025年第1期18卷 653-674页

作者： qian Gao Lin Tang Jun Zhan Yiyuan Xue Feng luo State Key Laboratory of Oral Diseases&National Center for Stomatology&National Clinical Research Center for Oral Diseases West China Hospital of StomatologySichuan UniversityChengdu 610041China Emergency Obstetrics and Gynecology West China Second University HospitalSichuan UniversityChengdu 610041China Department of Obstetrics and Gynecology West China Second University HospitalSichuan UniversityChengdu 610041China Department of Prosthodontics West China School of StomatologySichuan UniversityChengdu 610041China

With the increasing incidence of breast cancer globally,there is an urgent demand for enhanced diagnostic and therapeutic *** comprehensive review explores advancements in fluorescent probe technology for breast cancer imaging and early *** probes offer unparalleled sensitivity and specificity in detecting cancer biomarkers,enabling early diagnosis and delineation of tumor margins during *** categorize these probes into molecular,nano,ratiometric,the second near-infrared window(NIR-II),and multifunctional varieties,each with unique capabilities for targeting specific cancer *** review highlights recent innovations in probe design,emphasizing their applications in pathogenesis studies,drug development,precision medicine,and fluorescence-guided *** their promising clinical potential,challenges such as safety,biomarker targeting accuracy,system compatibility,and clinical translation *** these hurdles is crucial for the integration of fluorescent probes into standard cancer care,aiming to improve treatment outcomes and patient quality of life.

关键词： breast cancer fluorescent probes imaging early diagnosis biomarker

Causal temporal graph attention network for fault diagnosis of chemical processes

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Chinese Journal of Chemical Engineering 2024年第6期70卷 20-32页

作者： Jiaojiao luo Zhehao jin Heping jin qian Li Xu Ji Yiyang Dai School of Chemical Engineering Sichuan UniversityChengdu 610065China China Three Gorges Corporation Beijing 100038China

Fault detection and diagnosis(FDD)plays a significant role in ensuring the safety and stability of chemical *** the development of artificial intelligence(AI)and big data technologies,data-driven approaches with excellent performance are widely used for FDD in chemical ***,improved predictive accuracy has often been achieved through increased model complexity,which turns models into black-box methods and causes uncertainty regarding their *** this study,a causal temporal graph attention network(CTGAN)is proposed for fault diagnosis of chemical processes.A chemical causal graph is built by causal inference to represent the propagation path of *** attention mechanism and chemical causal graph were combined to help us notice the key variables relating to fault *** in the Tennessee Eastman(TE)process and the green ammonia(GA)process showed that CTGAN achieved high performance and good explainability.

关键词： Chemical processes Safety Fault diagnosis Causal discovery Attention mechanism Explainability

Enhancing blocking temperature using inverse hydrogen bonds for non-radical bridged dimeric Dy(Ⅲ)single-molecule magnets

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Science China Chemistry 2024年第10期67卷 3328-3338页

作者： Peng-Bo jin qian-Cheng luo Ye-Ye Liu Yan-Zhen Zheng Frontier Institute of Science and Technology State Key Laboratory of Electrical Insulation and Power EquipmentMOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed MatterXi’an Key Laboratory of Electronic Devices and Material Chemistry and School of ChemistryXi’an Jiaotong UniversityXi’an 710054China

Single-molecule magnets(SMMs)are a kind of nanosized magnetic materials that are capable of storing massive bytes of *** coupling the spin centers in a proper manner is a usual approach to promote the working temperature(or blocking temperature)for *** delocalized radicals have been widely employed to accomplish this ***,we show a new manner by using weak but multiple B–H^(δ-)···Dy^(3+)inverse hydrogen bonding(IHB)interactions to control the magnetic couplings in a series of dimeric dysprosiacaborane *** approach leads to a record high T_(B)^(100s)of 10 K among non-radical bridged dimeric SMMs,which is mainly ascribed to strong ferromagnetic coupling(4.38 cm^(-1))and the proper alignment of the magnetic principle axes of the adjacent dysprosium(Ⅲ)*** verifying by theoretical calculations,these results demonstrate that IHB interactions can be used to construct strong axial ferromagnetic coupling and enhancing magnetic blocking temperature for SMMs.

关键词： single-molecule magnets carborane dysprosium ferromagnetic coupling inverse hydrogen bond

Effect and mechanism of siderite on reverse flotation of hematite

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International Journal of Minerals,Metallurgy and Materials 2016年第4期23卷 373-379页

作者： Wan-zhong Yin Dong Li Xi-mei luo jin Yao qian-yu Sun College of Resources and Civil Engineering Northeastern University College of Zijin Mining Fuzhou University Faculty of Land Resource Engineering Kunming University of Science and Technology

The effects of siderite on reverse flotation of hematite were investigated using micro flotation, adsorption tests, and Fourier transform infrared spectroscopy. The flotation results show that interactions between siderite and quartz are the main reasons that siderite significantly influences the floatability. The interactions are attributed to dissolved siderite species and fine siderite particles. The interaction due to the dissolved species is, however, dominant. Derjaguin-Landau-Verwey-Overbeek（DLVO） theoretical calculations reveal that adhesion on quartz increases when the siderite particle size decreases and that fine particles partly influence quartz floatability. Chemical solution calculations indicate that the dissolved species of siderite might convert the surface of active quartz to CaCO_3 precipitates that can be depressed by starch. The theoretical calculations are in good agreement with the results of adsorption tests and FTIR spectroscopy and explain the reasons why siderite significantly influences reverse flotation of hematite.

关键词： hematite siderite reverse flotation solution chemistry

Enhanced grain refinement of Al-Si alloys by novel Al-V-B refiners

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Journal of Materials Science & Technology 2021年第35期94卷 104-112页

作者： Chenxi Zhao Yang Li jin Xu Qun luo Ying Jiang Qiling Xiao qian Li State Key Laboratory of Advanced Special Steels Shanghai Key Laboratory of Advanced FerrometallurgySchool of Materials Science and EngineeringShanghai UniversityShanghai 200444China Materials Genome Institute Shanghai UniversityShanghai 200444China

Al-V-B master alloy is promising for refining Al-Si alloys,yet its optimal composition with superior efficacy remains to be *** this work,the evolution of refining phases in the Al-10 Si/Al-V-B system with different V:B ratios was evaluated by thermodynamic calculations,based on which the Al-V-B refiners with V:B=1:1 and 5:1 were *** trails demonstrated that they could significantly reduce the grain size of Al-10 Si(wt.%)alloy from 1736 to 184-245μm with industrial addition *** examinations results clarify that when V:B ratio is 1:1 the nucleation particle is(V,Al)B_(2),which has a VB_(2)-AlB_(2) core-shell structure and therefore presents the nucleation capability as AlB_(2) *** V:B ratio is as high as 5:1,the nucleation particle is pure VB_(2).Density functional theory(DFT)calculation indicates that(0001)VB_(2)/(111)α-Al interface has the lowest interfacial energy such that highest nucleation potency among other types of diboride/α-Al interfaces under *** outcomes of this work provide fundamental guidance to develop superior V-B based refiners for Al-Si alloys.

关键词： Al-Si alloys Grain refinement Al-V-B Interfacial structure Thermodynamic calculation