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Apically guiding electron/mass transfer reaction induced by Ag/FeN_(x)Mott-Schottky effect within a hollow star reactor toward high performance zinc-air batteries

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Journal of Energy Chemistry 2024年第8期95卷 106-116,I0004页

作者： Kaixiang Shi Kaixin Wang Tong Li Junhao Li jie ren Xu Li Yonggang Min Zhouguang Lu Wei Tan Quanbing Liu Guangdong Provincial Laboratory of Chemistry and Fine Chemical Engineering jieyang Center(Rongjiang Laboratory) Guangdong University of TechnologyJieyang 515200GuangdongChina Guangzhou Key Laboratory of Clean Transportation Energy Chemistry Guangdong Provincial Key Laboratory of Plant Resources BiorefinerySchool of Chemical Engineering and Light IndustryGuangdong University of TechnologyGuangzhou 510006GuangdongChina Key Laboratory of Electrochemical Energy Storage and Energy Conversion of Hainan Province School of Chemistry and Chemical EngineeringHainan Normal UniversityHaikou 571158HainanChina School of Materials and Energy Guangdong University of TechnologyGuangzhou 510006GuangdongChina Department of Materials Science and Engineering Southern University of Science and TechnologyShenzhen 518055GuangdongChina

The disparity in the transfer of carriers(electrons/mass)during the reaction in zinc-air batteries(ZABs)results in sluggish kinetics of the oxygen reduction reaction(ORR)and oxygen evolution reaction(OER),along with elevated overpotentials,thereby imposing additional constraints on its ***,the pre-design and target-development of inexpensive,high-performance,and long-term stable bifunctional catalysts are urgently *** this work,an apically guiding dual-functional electrocatalyst(Ag-FeN_(x)-N-C)was prepared,in which a hierarchical porous nitrogen-doped carbon with three-dimensional(3D)hollow star-shaped structure is used as a substrate and high-conductivity Ag nanoparticles are coupled with iron nitride(FeN_(x))*** calculations indicate that the Mott-Schottky heterojunction as an inherent electric field comes from the two-phase bound of Ag and FeN_(x),of which electron accumulation in the FeN_(x)phase region and electron depletion in the Ag phase region promote orientated-guiding charge *** effective modulation of local electronic structures felicitously reforms the d-band electron-group distribution,and intellectually tunes the masstransfer reaction energy barriers for both ORR/***,the hollow star-s haped hierarchical porous structure provides an apical region for fast mass *** results show that the halfwave potential for ORR is 0.914 V,and the overpotential for OER is only 32. mV at 10 mA cm^(-2..A rechargeable ZAB with Ag-FeN_(x)-N-C as the air cathode demonstrates long-term cycling performance exceeding 1500 cycles(500 h),with a power density of 180 mW cm^(-2..Moreover,when employing AgFeN_(x)-N-C as the air cathode,flexible ZABs demonstrate a notable open-circuit voltage of 1.42.V and achieve a maximum power density of 65.6 mW cm^(-2..Ag-FeN_(x)-N-C shows guiding electron/mass transfer route and apical reaction microenvironment for the electrocatalyst architecture in the explo

关键词： Hollow star structure Mott-Schottky effect Apically guiding effect Bifunctional catalysis Zinc-air batteries

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Effects of Diamond on the Mechanical Properties and Thermal Conductivity of Si_(3)N_(4)Composites Fabricated Using Spark Plasma Sintering

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Journal of Wuhan University of Technology(Materials Science) 2024年第5期39卷 1319-1324页

作者： GAO Ying LIU Di WANG Aiyang ZHANG Song HE Qianglong ren Shifeng FANG jie WANG Zihan WANG Weimin State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China Jingdezhen Huaxun Special Ceramics Co.ltd. Jingdezhen 333000China Aerospace Science&Industry Defense Technology Research and Test Center Beijing 100854China

Micrometer-sized diamonds were incorporated into silicon nitride(Si_(3)N_(4))matrix to manufacture high-performance Si_(3)N_(4)-based composites using spark plasma sintering at 1500℃under 50 *** effects of the diamond content on the phase composition,microstructure,mechanical properties and thermal conductivity of the composites were *** results showed that the addition of diamond could effectively improve the hardness of the *** thermal conductivity of Si_(3)N_(4)increased to 52.97 W/m·k at the maximum with the addition of 15 wt%diamond,which was 2..5%higher than that of the monolithic Si_(3)N_(4).At this point,the fracture toughness was 7.54 MPa·m^(1/2..Due to the addition of diamond,the composite material generated a new substance,MgSiN2.which effectively combined Si_(3)N_(4)with ***2.might improve the hardness and thermal conductivity of the materials.

关键词： spark plasma sintering Si_(3)N_(4) diamond thermal conductivity mechanical properties

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Fusarium mycotoxins:The major food contaminants

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mLife 2024年第2期3卷 176-206页

作者： Zheng Qu Xianfeng ren Zhaolin Du jie Hou Ye Li Yanpo Yao Yi An Agro‐Environmental Protection Institute Ministry of Agriculture and Rural AffairsTianjinChina Institute of Quality Standard and Testing Technology for Agro‐Products Shandong Academy of Agricultural SciencesJinanChina

Mycotoxins,which are secondary metabolites produced by toxicogenic fungi,are natural food toxins that cause acute and chronic adverse reactions in humans and *** genus Fusarium is one of three major genera of mycotoxin‐producing ***,fumonisins,and zearalenone are the major Fusarium mycotoxins that occur *** mycotoxins have the potential to infiltrate the human food chain via contamination during crop production and food processing,eventually threatening human *** occurrence and development of Fusarium mycotoxin contamination will change with climate change,especially with variations in temperature,precipitation,and carbon dioxide *** address these challenges,researchers have built a series of effective models to forecast the occurrence of Fusarium mycotoxins and provide guidance for crop *** mycotoxins frequently exist in food products at extremely low levels,thus necessitating the development of highly sensitive and reliable detection *** successful detection methods have been developed to meet the requirements of various situations,and an increasing number of methods are moving toward highthroughput *** Fusarium mycotoxins cannot be completely eliminated,numerous agronomic,chemical,physical,and biological methods can lower Fusarium mycotoxin contamination to safe levels during the preharvest and postharvest *** theoretical innovations and technological advances have the potential to facilitate the development of comprehensive strategies for effectively managing Fusarium mycotoxin contamination in the future.

关键词： climate change Fusarium mycotoxin management strategy mycotoxin detection

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FKF1b controls reproductive transition associated with adaptation to geographical distribution in maize

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Journal of Integrative Plant Biology 2024年第5期66卷 943-955页

作者： Suhui Chen Shan Gao Dongyang Wang jie Liu Yingying ren Zhihan Wang Xin Wei Qin Wang Xuehui Huang Shanghai Key Laboratory of Plant Molecular Sciences College of Life SciencesShanghai Normal UniversityShanghai 200234China

Maize(Zea mays subspecies mays)is an important commercial crop across the world,and its flowering time is closely related to grain yield,plant cycle and latitude ***1 is an essential clock-regulated blue-light receptor with distinct functions on flowering time in plants,and its function in maize remains *** this study,we identified two FKF1 homologs in the maize genome,named ZmFKF1a and ZmFKF1b,and indicated that ZmFKF1a and ZmFKF1b independently regulate reproductive transition through interacting with ZmCONZ1 and ZmGI1 to increase the transcription levels of ZmCONZ1 and *** demonstrated that ZmFKF1b underwent artificial selection during modern breeding in China probably due to its role in geographical ***,our data suggested that ZmFKF1bHap_C7 may be an elite allele,which increases the abundance of ZmCONZ1 mRNA more efficiently and adapt to a wider range of temperature zone than that of ZmFKF1bHap_Z58 to promote maize floral *** extends our understanding of the genetic diversity of maize *** allele is expected to be introduced into tropical maize germplasm to enrich breeding resources and may improve the adaptability of maize at different climate zones,especially at temperate region.

关键词： flowering geographical distribution maize ZmFKF1

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Harnessing antimicrobial peptide-coupled photosensitizer to combat drug-resistant biofilm infections through enhanced photodynamic therapy

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Acta Pharmaceutica Sinica B 2024年第4期14卷 1759-1771页

作者： Duoyang Fan Xiaohui Liu Yueming ren Ziheng Luo Yanbing Li jie Dong Seraphine VWegner Fei Chen Wenbin Zeng Xiangya School of Pharmaceutical Sciences Central South UniversityChangsha 410013China Hunan Key Laboratory of Diagnostic and Therapeutic Drug Research for Chronic Diseases Central South UniversityChangsha 410013China Sir William Dunn School of Pathology University of OxfordOxford OX13REUK Xiangya Hospital of Central South University Changsha 410013China Institute of Physiological Chemistry and Pathobiochemistry University of MünsterMünster 48149Germany

Bacterial biofilm-associated infection was one of the most serious threats to human health. However, effective drugs for drug-resistance bacteria or biofilms remain rarely reported. Here, we propose an innovative strategy to develop a multifunctional antimicrobial agent with broad-spectrum antibacterial activity by coupling photosensitizers (PSs) with antimicrobial peptides (AMPs). This strategy capitalizes on the ability of PSs to generate reactive oxygen species (ROS) and the membrane-targeting property of AMPs (KRWWKWIRW, a peptide screened by an artificial neural network), synergistically enhancing the antimicrobial activity. In addition, unlike conventional aggregation-caused quenching (ACQ) photosensitizers, aggregation-induced emission (AIE) PSs show stronger fluorescence emission in the aggregated state to help visualize the antibacterial mechanism. In vitro antibacterial experiments demonstrated the excellent killing effects of the developed agent against both Gram-positive (G^(+)) and Gram-negative (G^(–)) bacteria. The bacterial-aggregations induced ability enhanced the photoactivatable antibacterial activity against G^(–) bacteria. Notably, it exhibited a significant effect on destroying MRSA biofilms. Moreover, it also showed remarkable efficacy in treating wound infections in mice in vivo. This multifunctional antimicrobial agent holds significant potential in addressing the challenges posed by bacterial biofilm-associated infections and drug-resistant bacteria.

关键词： Photodynamic therapy Antimicrobial peptides Multidrug-resistant bacteria Aggregation-induced emission Anti-biofilm

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Typhoon-Induced Ocean Waves and Stokes Drift:A Case Study of Typhoon Mangkhut(2.18)

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China Ocean Engineering 2024年第4期38卷 711-724页

作者： WU Zhi-yuan GAO Kai CHEN jie ZHANG Hao-jian DENG Bin JIANG Chang-bo LIU Yi-zhuang LYU Zhao YAN ren School of Hydraulic and Environmental Engineering Changsha University of Science&TechnologyChangsha 410114China Key Laboratory of Water-Sediment Sciences and Water Disaster Prevention of Hunan Province Changsha 410114China State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering Hohai UniversityNanjing 210024China State Key Laboratory of Coastal and Offshore Engineering Dalian University of TechnologyDalian 116024China School of Civil Engineering Hunan University of TechnologyZhuzhou 412007China

Ocean waves and Stokes drift are generated by *** study investigated the characteristics of ocean waves and wave-induced Stokes drift and their effects during Typhoon Mangkhut using European Centre for MediumRange Weather Forecasts(ECMWF)ERA5 datasets and observational *** results revealed that the typhoon generated intense cyclones and huge typhoon waves with a maximum wind speed of 45 m/s,a minimum pressure of955 h Pa,and a maximum significant wave height of 12.*** Stokes drift caused by typhoon waves exceeded 0.6m/s,the Stokes depth scale exceeded 18 m,and the maximum Stokes transport reached 6 m^(2./*** spatial distribution of 10-m wind speed,typhoon wave height,Stokes drift,Stokes depth,and Stokes transport during the typhoon was highly correlated with the typhoon *** distribution along the typhoon track showed significant zonal asymmetry,with greater intensity on the right side of the typhoon track than on the left *** findings provide important insights into the impact of typhoons on ocean waves and Stokes drift,thus improving our understanding of the interactions between typhoons and the ocean *** study also investigated the contribution of Stokes transport to the total net transport during typhoons using Ekman-Stokes Numbers as a comparative *** results indicated that the ratio of Stokes transport to the total net transport reached up to 50%within the typhoon radius,while it was approximately 30%outside the *** Stokes transport induced by typhoon waves led to divergence in the transport direction,which resulted in upwelling of the lower ocean as a compensation ***,Stokes transport played a crucial role in the vertical mixing of the ocean during *** findings suggested that Stokes transport should be paid more attention to,particularly in high latitude ocean regions,where strong winds can amplify its effects.

关键词： Stokes drift typhoon waves Ekman-Stokes transport vertical mixing Typhoon Mangkhut

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Significant effect of ordered micro-domain on cell boundary phase distribution and demagnetization curve squareness of Sm_(2.Co_(17)-type magnet

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Rare Metals 2024年第4期43卷 1724-1735页

作者： Zhuang Liu Hai-Chen Wu Chao-Yue Zhang Chao-Qun Zhu Guo-Xin Chen Huan-Ming Lu ren-jie Chen Aru Yan CISRI&NIMTE Joint Innovation Center for Rare Earth Permanent Magnets Ningbo Institute of Materials Technology and EngineeringChinese Academy of SciencesNingbo315201China University of Chinese Academy of Sciences Beijing100049China Analytical Center Ningbo Institute of Materials Technology and EngineeringChinese Academy of SciencesNingbo315201China

Cu-rich cell boundary phase is difficult to precipitate evenly,resulting in a generally poor demagnetization curve squareness for Fe-rich Sm_(2.Co_(17)-type magnet,which is a key factor limiting the further improvement of magnetic energy *** this study,we report that nanoscale strip-like ordered micro-domains distributed in1:7H disordered matrix phase of the solid solution precursor is a new factor significantly affecting the precipitation and distribution of the cell boundary *** strip-like and continuous micro-twin structure with twin boundaries neatly perpendicular to the C-axis is observed after sintering *** solution treatment,sequential and long strip-like micro-twins gradually transform into disordered state along the basal plane,forming narrow disordered 1:7H(TbCu_(7)-type structure)phase between the separated strip-like ordered *** disordering transformation takes place via broken down of the long strip-like ordered micro-domains,which is accomplished by narrowing along the width direction followed by reduction of the ***,a new model revealing the effect of the ordered micro-domains on the formation of the cell boundary phase is *** boundaries enriched in Cu have already existed in the precursor with long strip-like ordered ***,the Cu-rich cell boundary phase acting as strong pinning centers cannot be precipitated homogeneously and distributed continuously after aging,resulting in a poor demagnetization curve squareness of Sm_(2.Co_(17)-type *** results indicate that significant broken down of the nanoscale ordered micro-domains in solution precursor is the key factor improving the distribution of cell boundary phase in Sm_(2.Co_(17)-type magnets.

关键词： Sm_(2.Co_(17) magnets Solution precursor Ordered micro-domains Disordering transformation Cellular structure

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Acceptor-planarized typeⅠphotosensitizer for lipid droplet-targeted two-photon photodynamic therapy by ferroptosis

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Science China Chemistry 2024年第7期67卷 2392-2402页

作者： jie Sha Weimin Liu Jiasheng Wu Yanping Wang Xuewei Li Haohui ren Zhi Pang Wenjun Zhang Chun-Sing Lee Pengfei Wang Key Laboratory of Photochemical Conversion and Optoelectronic Materials CityU-CAS Joint Laboratory of Functional Materials and DevicesTechnical Institute of Physics and ChemistryChinese Academy of SciencesBeijing 100190China School of Future Technology University of Chinese Academy of SciencesBeijing 100049China Center of Super-Diamond and Advanced Films&Department of Materials Science and Engineering City University of Hong KongHong KongChina

Two-photon photodynamic therapy(TP-PDT)has garnered significant attention because of its excellent depth of tissue penetration and high spatiotemporal ***,the limited targeting ability and oxygen dependency of photosensitizers(PSs)significantly hinder the effectiveness of photodynamic therapy in hypoxic tumor ***,we designed and synthesized two lipid droplet(LD)-targeted two-photon PSs(TBPCP and TBCP)by reducing benzene rings to achieve“acceptor planarization”.Notably,acceptor planarization not only enhanced the intramolecular charge transfer but also transferred the photochemical reaction from typeⅡ(TBPCP)to typeⅠ(TBCP).Under the irradiation of 940 nm femtosecond pulsed laser,TBPCP and TBCP showed bright two-photon-excited fluorescence and excellent LD targeting in living *** TBPCP(typeⅡPS),the outstanding TP-PDT efficacy of TBCP(typeⅠPS)under hypoxic conditions could be obtained in both cellular experiments and multicellular tumor spheroids(MCTS)***,both TBPCP and TBCP could induce the lipid peroxidation in the typeⅠor typeⅡPDT due to the location of LD,depleting GSH and inactivating GPX4 to induce nonprogrammed ferroptosis in cells.

关键词： two-photon photodynamic therapy lipid droplet targeting acceptor planarization hypoxia tumor ferroptosis

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Recent advances in Fe-N-C-and Co-N-C-based materials as bifunctional electrocatalysts for oxygen reduction and oxygen evolution

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Science China Chemistry 2024年第4期67卷 1137-1160页

作者： Hui-Min Xu Hong-Rui Zhu Chen-Jin Huang Zhi-jie Zhang Ting-Yu Shuai Qi-Ni Zhan Gao-ren Li College of Materials Science and Engineering Sichuan UniversityChengdu 610065China

Fe-nitrogen-carbon(Fe-N-C)-and Co-nitrogen-carbon(Co-N-C)-based electrocatalysts have been widely concerned because of their high OER/ORR activity,low metal cost,and simple *** exploration of Fe-N-C and Co-N-C single atombased catalysts with high activity and stability to overcome the slow kinetics of oxygen reduction and oxygen evolution reactions is also the key to the development of efficient electrolytic water,fuel cells,and rechargeable metal-air ***-N-C and Co-N-C single atom-based electrocatalysts have the advantages of a high utilization rate of metal atoms and high electrocatalytic activity,and are ideal catalysts for promoting electrochemical energy conversion and *** general principles of designing Fe-N-C and Co-N-C single atom-based electrocatalysts are reviewed in this ***,the strategies to improve the bifunctional catalytic activity and stability are ***,the challenges and prospects of Fe-N-C and Co-N-C single atom-based catalysts are well *** review will provide a reference for the directed optimization of Fe-N-C and Co-N-C single atom-based catalysts.

关键词： Fe-N-C Co-N-C single atom bifunctional oxygen electrocatalysts

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Anemarsaponin B mitigates acute pancreatitis damage in mice through apoptosis reduction and MAPK pathway modulation

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BIOCELL 2024年第5期48卷 745-758页

作者： YI HU ZHONGYANG ren ZHENGZHONG ZHAO YONGJIA HUANG WANTING HUANG jie LIU LING DING Gastroenterology Department Chongqing University Jiangjin HospitalJiangjin Central Hosptial of ChongqingChongqingChina Surgical Department Chongqing Jiangjin District Hospital of Chinese MedicineChongqingChina Pharmacy Department Chongqing University Jiangjin HospitalJiangjin Central Hosptial of ChongqingChongqingChina

Background:Acute pancreatitis(AP),known for its rapid onset and significant incidence and mortality rates,presents a clinical challenge due to the limited availability of effective treatments and preventive *** B(ASB)has emerged as a potential therapeutic agent,demonstrating capabilities in reducing immune inflammation,positioning it as a promising candidate for AP ***:We investigated the effects of ASB on AP in mice,induced by caerulein and lipopolysaccharide(LPS).Peripheral blood samples were collected 2. h post-induction with caerulein to assess of key biomarkers including lipase,amylase,TNF-α,IL-1β,IL-6,SOD,and GSH-Px.A range of techniques such as immunohistochemistry staining,immunofluorescence staining,Western blotting,and quantitative Polymerase Chain Reaction(q-PCR),were employed to measure the expression of critical ***,pancreas samples from the mice were harvested for microbiome and metabolome sequencing,with the data analyzed to understand the impact of ASB on ***:Our study revealed that,compared to the sham group,the AP group exhibited significantly higher serum levels of lipase,amylase,and cytokines,while levels of SOD and GSH Px were notably *** with ASB led to a substantial decrease in the levels of lipase,amylase,and cytokines,and an increase in SOD and GSH-Px levels.q-PCR analysis of pancreatic histiocytes corroborated these serum *** and Eosin(H&E)staining indicated significant alterations in the pathological changes in the pancreas,lungs,and small intestine of the AP model due to *** assays demonstrated that ASB alleviated the apoptosis of pancreatic histiocytes in the AP *** Blot and histological analyses showed that ASB reduced the phosphorylation of TAK,p38,JNK,and ERK proteins,as well as the levels of TRAF6 protein in the AP ***,metabolomic and gut microbiota analysis identified 2. differential metabolites and 34 diffe

关键词： Anemarsaponin B Acute pancreatitis Cytokines MAPK TRAF6 Gut flora

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