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Acta Metallurgica Sinica(English Letters) 2024年第4期37卷 648-664页

作者： Zhaochen Yu Kaixuan Feng shuyun deng Yang Chen Hong Yan Honggun Song Chao Luo Zhi Hu School of Advanced Manufacturing Nanchang UniversityNanchang330031China Institute for Advanced Study Nanchang UniversityNanchang330031China

The phosphate protective film and micro-galvanic corrosion of biological Mg-3Zn-xNd (x = 0, 0.6, 1.2) alloys were investigated by scanning and transmission electron microscopy, quasi-in-situ observation, scanning Kelvin probe force microscopy (SKPFM) and electrochemical tests. The results revealed the Mg-Zn-Nd phases formed in Mg-3Zn alloy contained with Nd. Adding Nd resulted in a significant decline in the cracks of the phosphate protective film and micro-galvanic corrosion of alloys, which were recorded by quasi-in-situ observation. In addition, the Volta potential difference of Mg-Zn-Nd/α-Mg (~ 188 mV) was lower than MgZn/α-Mg (~ 419 mV) and Zn-rich/α-Mg (~ 260 mV), and the corrosion rates of alloys markedly decreased after the addition of 0.6 wt% Nd. The improvement in corrosion resistance of Nd-containing alloys was mainly attributed to the following: (i) the addition of Nd reduced the Volta potential difference (second phases/α-Mg);(ii) the phosphate protective film containing Nd_(2)O_(3) deposited on the surface of the alloys, effectively preventing the penetration of harmful anions.

关键词： Magnesium alloys Quasi-in-situ observation Phosphate protective film Scanning Kelvin probe force microscopy(SKPFM) Micro-galvanic corrosion

A lubrication model for bubbly oil lubrication with interfacial effect and thermal effect using the theory of multiphase mixtures

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Friction 2024年第2期12卷 271-290页

作者： Shaohua LI Xiaohui LIN shuyun JIANG School of Mechanical Engineering Southeast UniversityNanjing 211189China

Bubbly oil lubrication is a type of lubrication ***,the lubrication model of the bubbly oil has not been thoroughly *** paper aims to investigate the modelling for bubbly oil lubrication considering the interfacial effect and thermal effect,and a theoretical model is established based on the theory of multiphase *** interfacial and thermal effects on the static characteristics of a thrust bearing are analyzed.A test rig for the thrust bearing is developed to measure the static characteristics of the bearing under bubbly oil *** results show that the bearing static characteristics,*** temperature rise,film thickness,friction torque,and volume flow,increase with consideration of three interfacial effects;the bearing temperature rise increases but the film thickness,friction torque,and volume flow rate decrease with consideration of the three thermal effects;the thermal effect on the bearing static characteristics is greater than the interfacial effect.

关键词： bubbly oil lubrication theory of multiphase mixtures interfacial effect thermal effect fluid bearing

The chromosome-level genome of double-petal phenotype jasmine provides insights into the biosynthesis of floral scent

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Horticultural Plant Journal 2024年第1期10卷 259-272页

作者： Xiangyu Qi Huadi Wang shuyun Liu Shuangshuang Chen Jing Feng Huijie Chen Ziyi Qin Quanming Chen Ikram Blilou Yanming deng Jiangsu Key Laboratory for Horticultural Crop Genetic Improvement Institute of Leisure AgricultureJiangsu Academy of Agricultural SciencesNanjingJiangsu 210014China School of Life Sciences Jiangsu UniversityZhenjiangJiangsu 212013China College of Horticulture Nanjing Agricultural UniversityNanjingJiangsu 210014China Shanghai Personal Biotechnology Company Limited Shanghai 200231China Biological and Environmental Sciences and Engineering King Abdullah University of Science and TechnologyThuwal 23955-6900Saudi Arabia

Jasmine(Jasminum sambac Aiton)is a well-known cultivated plant species for its fragrant flowers used in the perfume industry and ***,the genetic basis of its floral scent is largely *** this study,using PacBio,Illumina,10×Genomics and highthroughput chromosome conformation capture(Hi-C)sequencing technologies,a high-quality chromosome-level reference genome for *** was obtained,exploiting a double-petal phenotype cultivar‘Shuangbanmoli’(JSSB).The results showed that the final assembled genome of JSSB is 580.33 Mb in size(contig N50=1.05 Mb;scaffold N50=45.07 Mb)with a total of 39618 predicted protein-coding *** analyses revealed that the JSSB genome has undergone an ancient whole-genome duplication(WGD)event at 91.68 million years ago(Mya).It was estimated that *** diverged from the lineage leading to Olea europaea and Osmanthus fragrans about 28.8 *** the basis of a combination of genomic,transcriptomic and metabolomic analyses,a range of floral scent volatiles and genes were identified involved in the benzenoid/phenylpropanoid and terpenoid biosynthesis *** results provide new insights into the molecular mechanism of its fragrance biosynthesis in jasmine.

关键词： Jasminum sambac Aiton Oleaceae Genome evolution Floral scent Terpene synthase

Enhanced Redox Electrocatalysis in High‑Entropy Perovskite Fluorides by Tailoring d–p Hybridization

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Nano-Micro Letters 2024年第3期16卷 333-350页

作者： Xudong Li Zhuomin Qiang Guokang Han shuyun Guan Yang Zhao Shuaifeng Lou Yongming Zhu Department of Applied Chemistry Harbin Institute of Technology at WeihaiWeihai 264209People’s Republic of China MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage School of Chemistry and Chemical EngineeringHarbin Institute of TechnologyHarbin 150001People’s Republic of China

High-entropy catalysts featuring exceptional properties are,in no doubt,playing an increasingly significant role in aprotic lithium-oxygen *** extensive effort devoted to tracing the origin of their unparalleled performance,the relationships between multiple active sites and reaction intermediates are still ***,enlightened by theoretical screening,we tailor a high-entropy perovskite fluoride(KCoMnNiMgZnF_(3)-HEC)with various active sites to overcome the limitations of conventional catalysts in redox *** entropy effect modulates the d-band center and d orbital occupancy of active centers,which optimizes the d–p hybridization between catalytic sites and key intermediates,enabling a moderate adsorption of LiO_(2)and thus reinforcing the reaction *** a result,the Li–O2 battery with KCoMnNiMgZnF_(3)-HEC catalyst delivers a minimal discharge/charge polarization and long-term cycle stability,preceding majority of traditional catalysts *** encouraging results provide inspiring insights into the electron manipulation and d orbital structure optimization for advanced electrocatalyst.

关键词： Lithium-oxygen batteries KCoMnNiMgZnF_(3)-HEC perovskite fluoride Entropy effect Catalytic kinetics d-p orbital hybridization

Geometric and defects engineering collaboration for enhanced cascade enzymatic nanoreactors

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Nano Research 2024年第4期17卷 2451-2461页

作者： Zhichao Yu Ruijin Zeng Hexiang Gong Yuan Gao shuyun Chen Yunsen Wang Dianping Tang Key Laboratory for Analytical Science of Food Safety and Biology(MOE&Fujian Province) Department of ChemistryFuzhou UniversityFuzhou 350108China

Highly evolved multi-enzyme cascade catalytic reactions in organisms facilitate rapid transfer of substrates and efficient conversion of intermediates in the catalytic unit,thus rationalizing their efficient *** this study,pore-ordered mesoporous single-atom(Fe)nitrogen-doped carbon nanoreactors(Mp-Fe-CN)were designed,in which a reasonable pore size was designed as a natural enzyme trap coupled to a simulated enzyme center.A polarity-mediated strategy was developed to obtain atomically dispersed nanoporous substrates,with the finding that polarity-guided engineering of the nitrogen-ligand environment and vacancy cluster defects clearly affects nanoporous activity,accompanied by appreciable mesoporous pore size *** active center and distal N atom coordination of Fe-N_(4) affect the catalytic process of the nanozyme exposed by density functional theory(DFT),determining the contribution of hybridized orbitals to electron transfer and the decisive step.A cascade nanoreactor-based domain-limited sarcosine oxidase developed for non-invasive monitoring of sarcosine levels in urine for evaluation of potential prostate carcinogenesis as a proof of *** on the design of surface mesoporous channels of nanocatalytic units,a bridge was built for the interaction between nanozymes and natural enzymes to achieve cascade nanocatalysis of natural enzymatic products.

关键词： nanozyme single-atom catalyst bioreactor cascade catalysis non-Invasive sensing

Global Climate Governance and China’s Contributions in Perspective of a Community with a Shared Future for Mankind

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Contemporary World 2024年第2期 29-33页

作者： Li shuyun Liaoning University

In recent years,global climate changes have been rapid,unprecedented and ***ingly worsened conditions of existence are forcing vulnerable populations toward *** to the Contribution of Working Group I to the Sixth Assessment Report(AR6)of the Intergovernmental Panel on Climate Change(IPCC),observed increases in well-mixed greenhouse gas concentrations since around 1750 are unequivocally caused by human activities,and if global warming continues to follow current trends,the global climate will move towards an irreversible tipping point of systemic collapse.

关键词： greenhouse warming climate

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Porous block copolymer films with self-adjustable optical transmittance and passive radiative cooling

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Nano Research 2024年第9期17卷 8472-8478页

作者： Xue Meng Weiming Tang shuyun Zhuo Jince Zhao Zixuan Ren Zhonghe Sun Hao Yan Tianyi Zhao Ziguang Zhao Mingjie Liu School of Future Technology University of Chinese Academy of SciencesBeijing 100049China Key Laboratory of Bio-Inspired Smart Interfacial Science and Technology of Ministry of EducationSchool of ChemistryBeihang UniversityBeijing 100191China

As an energy-free cooling technique,radiative cooling has garnered significant attention in the field of energy ***,traditional radiative cooling films often possess static optical properties and their inherent opacity limits their applications in building such as ***,there exists a requirement for passive radiative cooling films endowed with adjustable *** we report the porous block copolymer films with self-adjustable optical transmittance and passive radiative *** a result,the film exhibited a high solar reflectance(0.3-2.5μm)of 96.9%and a high infrared emittance(8-13μm)of 97.9%.Outdoor experiments demonstrated that the film surface temperature was 6.6℃lower than ambient temperature,with a cooling power of 104.8 W·m^(-2).In addition,the film’s transmittance can be regulated by altering the polarity of the post-processing solvent,providing an effective approach for regulating indoor light intensity and thermal balance,thereby enhancing the applicability of radiative cooling.

关键词： passive radiative cooling block copolymer porous structure self-adjustable optical transmittance

基于CT和MRI影像组学预测肝细胞癌微血管侵犯研究进展

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中华肝脏病杂志 2022年第8期30卷 809-813页

作者：刘燕娜许乙凯邓淑云丁惠国首都医科大学附属北京佑安医院肝病消化中心北京100069 南方医科大学南方医院影像诊断科广州510515 南方医科大学南方医院感染内科广东省病毒性肝炎研究重点实验室广东省肝脏疾病研究所广州510515

肝细胞癌是全球最常见的恶性肿瘤之一,微血管侵犯(MVI)是术后复发及转移的重要原因。MVI的诊断依靠术后肿瘤的病理学检查,术前寻求无创评估MVI的方法及生物标志物,对指导手术治疗和提高患者生存具有重要临床意义。近年来不少研究报道了... 详细信息

肝细胞癌是全球最常见的恶性肿瘤之一,微血管侵犯(MVI)是术后复发及转移的重要原因。MVI的诊断依靠术后肿瘤的病理学检查,术前寻求无创评估MVI的方法及生物标志物,对指导手术治疗和提高患者生存具有重要临床意义。近年来不少研究报道了利用影像组学预测肝细胞癌MVI,结果表明该技术在本领域具有一定的应用前景。现总结了近年来基于CT或MRI图像影像组学模型预测MVI研究结果,以期为该领域的进一步研究提供有益的思考。

关键词：肝细胞癌计算机断层成像磁共振成像微血管侵犯影像组学

The proximity between hydroxyl and single atom determines the catalytic reactivity of Rh1/CeO_(2) single-atom catalysts

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Nano Research 2024年第1期17卷 397-406页

作者： Danfeng Wu shuyun Zhou Congcong Du Juan Li Jianyu Huang Hong-xia Shen Abhaya K.Datye Shan Jiang Jeffrey T.Miller Sen Lin Haifeng Xiong State Key Laboratory of Physical Chemistry of Solid Surfaces College of Chemistry and Chemical EngineeringXiamen UniversityXiamen 361005China State Key Laboratory of Photocatalysis on Energy and Environment College of ChemistryFuzhou UniversityFuzhou 350002China Clean Nano Energy Center State Key Laboratory of Metastable Materials Science and TechnologyYanshan UniversityQinhuangdao 066004China College of Biology and Chemical Engineering Jiaxing UniversityJiaxing 314000China Department of Chemical&Biological Engineering University of New MexicoAlbuquerqueNM 8731-0001USA Davidson School of Chemical Engineering Purdue UniversityWest LafayetteIN 47907-2100USA Innovation Laboratory for Sciences and Technologies of Energy Materials of Fujian Province(IKKEM) Xiamen 361102China Fujian Key Laboratory of Rare-earth Functional Materials Fujian Shanhai Collaborative Innovation Center of Rare-earth Functional MaterialsLongyan 366300China

The local structure of the metal single-atom site is closely related to the catalytic activity of metal single-atom catalysts(SACs).However,constructing SACs with homogeneous metal active sites is a challenge due to the surface heterogeneity of the conventional ***,we prepared two Rh1/CeO_(2)SACs(0.5Rh1/r-CeO_(2)and 0.5Rh1/c-CeO_(2),respectively)using two shaped CeO_(2)(rod and cube)exposing different facets,i.e.,CeO_(2)(111)and CeO_(2)(100).In CO oxidation reaction,the T100 of 0.5Rh1/r-CeO_(2)SACs is 120°C,while the T100 of 0.5Rh1/c-CeO_(2)SACs is as high as 200°*** in-situ CO diffuse reflectance infrared Fourier transform spectroscopy(CO-DRIFTS),we found that the proximity between OH group and Rh single atom on the plane surface plays an important role in the catalytic activity of Rh1/CeO_(2)SAC system in CO *** Rh single atom trapped at the CeO_(2)(111)crystal surface forms the Rh1(OH)adjacent species,which is not found on the CeO_(2)(100)crystal surface at room ***,during CO oxidation,the OH group far from Rh single atom on the 0.5Rh1/c-CeO_(2)disappears and forms Rh1(OH)adjacent species when the temperature is above 150°*** formation of Rh1(OH)adjacentCO intermediate in the reaction is pivotal for the excellent catalytic activity,which explains the difference in the catalytic activity of Rh single atoms on two different CeO_(2)*** formed Rh1(OH)adjacent-O-Ce structure exhibits good stability in the reducing atmosphere,maintaining the Rh atomic dispersion after CO oxidation even when pre-reduced at high temperature of 500°*** functional theory(DFT)calculations validate the unique activity and reaction path of the intermediate Rh1(OH)adjacentCO species *** work demonstrates that the proximity between metal single atom and hydroxyl can determine the formation of active intermediates to affect the catalytic performances in catalysis.

关键词： crystal plane Rh1/CeO_(2)single-atom catalyst proximity of Rh and hydroxyl coordination structure CO oxidation

职工基本医疗保险个人账户制度的法理困境与改革重构

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社会保障评论 2024年第4期8卷 86-101页

作者：孙淑云山西财经大学法学院

从基本医疗保险法理视角释明个人账户基金权属及其运行机制,有助于破解个人账户制度改革之认知难题。个人账户基金“建筑”在职工基本医疗保险基金之上,属法定公共基金的一部分;个人账户制度是内嵌、贯通于职工基本医疗保险全流程的重... 详细信息

从基本医疗保险法理视角释明个人账户基金权属及其运行机制,有助于破解个人账户制度改革之认知难题。个人账户基金“建筑”在职工基本医疗保险基金之上,属法定公共基金的一部分;个人账户制度是内嵌、贯通于职工基本医疗保险全流程的重要运行制度;参保人履行缴纳保险费义务,对个人账户享有门诊、购药等待遇给付请求权。个人账户制度的建立,在促进传统医疗保障制度向社会医疗保险制度“转型”中起到了一定的积极作用。但是,带有计划经济体制的负荷性,违背基本医疗保险的社会共同责任原则、现收现付财务运行规则是其根本缺陷。改革的治本之策在于,回归基本医疗保险法理,着眼于职工基本医疗保险制度的结构性优化,对个人账户制度进行体系化改革,将个人账户基金全部纳入统筹基金,打破个人账户与统筹账户割裂异质的运行机制,重塑统筹共济保障机制,重构参保人的权利义务内容,牵引基本医疗保险制度尽快定型和法治化。

关键词：职工基本医疗保险个人账户统筹共济保障机制社会共同责任原则现收现付财务运行规则