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Science China Chemistry 2024年第6期67卷 1922-1928页

作者： Shasha Zhang Wei Yao Anqi Lv Kun Liu Yusheng Zhang Chifeng zhou Huili ma Huifang Shi Zhongfu An Key Laboratory of Flexible Electronics(KLOFE)&Institute of Advanced materials(IAM) Nanjing Tech UniversityNanjing211816China

High-efficiency long-wavelength phosphorescence emissions of large singlet-triplet energy gap(ΔE_(ST))materials are essential for applications in biology and display.However,few long-wavelength phosphorescence emissions of largeΔE_(ST)materials have been reported due to the weak spin-orbit coupling(SOC)and strong non-radiative transitions.Herein,we develop a strategy to achieve highly efficient long-wavelength room temperature phosphorescence(RTP)emission of largeΔE_(ST)materials,which display bright red RTP emission with above 400μs lifetime and 6.5%phosphorescent quantum efficiency.Our experiments and theoretical calculations reveal that the fishbone-like packing and the zig-zag interactions provide favorable conditions for suppressing the non-radiative transitions of triplet state excitons,and heavy atoms effectively promote the intersystem crossing(ISC)process for highly efficient long-wavelength phosphorescence emission.The universality of the method for highly efficient long-wavelength RTP emission of largeΔE_(ST)materials was further investigated in various guests.Moreover,these materials with largeΔE_(ST)manifest the advantages of large color contrast on the display and utilization potentiality in information encryption.This strategy paves the way for the high contrast display and development of information encryption with RTP emission.

关键词： room temperature phosphorescence singlet-triplet energy gap host-guest doping heavy atom effect red phosphorescence

Practical Constant-Size Ring Signature

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Journal of Computer Science & Technology 2018年第3期33卷 533-541页

作者： Meng-Jun Qin Yun-Lei Zhao zhou-Jun ma Shanghai Key Laboratory of Data Science School of Computer Science Fudan University Shanghai 201203 China State Key Laboratory of Integrated Services Networks Xidian University Xi'an 710126 China State Key Laboratory of Cryptology State Cryptology Administration Beijing 100878 China

Bitcoin has gained its popularity for almost 10 years as a ＂secure and anonymous digital currency＂. However, according to several recent researches, we know that it can only provide pseudonymity rather than real anonymity, and privacy has been one of the main concerns in the system similar to Bitcoin. Ring signature is a good method for those users who need better anonymity in cryptocurrency. It was first proposed by Rivest et al. based upon the discrete logarithm problem （DLP） assumption in 2006, which allows a user to sign a message anonymously on behalf of a group of users even without their coordination. The size of ring signature is one of the dominating parameters, and constant-size ring signature （where signature size is independent of the ring size） is much desirable. Otherwise, when the ring size is large, the resultant ring signature becomes unbearable for power limited devices or leads to heavy burden over the communication network. Though being extensively studied, currently there are only two approaches for constant-size ring signature. Achieving practical constant-size ring signature is a long-standing open problem since its introduction. In this work, we solve this open question. We present a new constant-size ring signature scheme based on bilinear pairing and accumulator, which is provably secure under the random oracle （RO） model. To the best of our knowledge, it stands for the most practical ring signature up to now.

关键词： ring signature constant size bilinear pairing accumulator

Interfacial mechanism of hydrogel with controllable thickness for stable drag reduction

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Friction 2024年第2期12卷 231-244页

作者： Xiaotong WU Ying LIU Yunlei ZHANG Xingwei WANG Wufang YANG Lang JIANG Shuanhong ma Meirong CAI Feng zhou School of Advanced manufacturing Nanchang UniversityNanchang 330031China State Key Laboratory of Solid Lubrication Lanzhou Institute of Chemical PhysicsChinese Academy of SciencesLanzhou 730000China Yantai Zhongke Research Institute of Advanced materials and Green Chemical Engineering Shandong Laboratory of Yantai Advanced Materials and Green ManufactureYantai 264006China

Surface wettability plays a significant role in reducing solid–liquid frictional resistance,especially the superhydrophilic/hydrophilic interface because of its excellent thermodynamic stability.In this work,poly(acrylic acid)-poly(acrylamide)(PAA–PAM)hydrogel coatings with different thicknesses were prepared in situ by polydopamine(PDA)-UV assisted surface catalytically initiated radical polymerization.Fluid drag reduction performance of hydrogel surface was measured using a rotational rheometer by the plate–plate mode.The experimental results showed that the average drag reduction of hydrogel surface could reach up to about 56%in Couette flow,which was mainly due to the interfacial polymerization phenomenon that enhanced the ability of hydration layer to delay the momentum dissipation between fluid layers and the diffusion behavior of surface.The proposed drag reduction mechanism of hydrogel surface was expected to shed new light on hydrogel–liquid interface interaction and provide a new way for the development of steady-state drag reduction methods.

关键词： steady state drag reduction hydrogel interface hydration hydrophilic

Phlorizin alleviates deltamethrin-induced oxidative stress in brine shrimp Artemia

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Journal of Oceanology and Limnology 2024年第1期42卷 163-173页

作者： Dandan ma Qingli zhou Liying SUI Qingbin GUO Huanhuan LIU Honghe LIANG Zhenjing LI Zhongna SANG School of Food Science and Engineering Tianjin University of Science and TechnologyTianjin 300457China Asian Regional Artemia Reference Center Key Laboratory of Marine Resource Chemistry and Food Technology(TUST)Ministry of EducationTianjin University of Science and TechnologyTianjin 300457China Subtropical Crops Research Institute of Guangxi Zhuang Autonomous Region Nanning 530001China Department of Nutrition and Food Hygiene School of Public HealthTianjin Medical UniversityTianjin 300070China

Deltamethrin(DEL),a commonly used pyrethroid pesticide,results in higher reactive oxygen species(ROS)levels in aquatic animals,which consequently unbalance the redox state.Phlorizin(PHL)is a flavonoid and a natural product promising to prevent or reduce pesticide-induced oxidative stress.Artemia is a micro-crustacean widely used in marine hatcheries and an experimental aquatic organism for environmental toxicology research.This research aimed to evaluate the toxicity of DEL on Artemia and the antioxidative effect of PHL against the toxicity.Results show that 0.08-mg/mL PHL exerted its antioxidative effects on hatching percentage of the cysts in 24-h incubation and on body length and survival rate of Artemia in 12-d culture.After 12-d culture,12-,24-,and 36-h DEL exposure showed significant drops in SOD,CAT,and GSH-Px enzyme activities,and significant increases in ROS and malondialdehyde(MDA)levels in Artemia(Pmage by possibly regulating the Nrf2signaling pathway.This study provided a theoretical basis for PHL to reduce pesticide-induced toxicity in aquatic animals.

关键词： Artemia deltamethrin phlorizin oxidative stress

Effect of cobalt substitution for nickel on microstructural evolution and hydrogen storage properties of La_(0.66)Mg_(0.34)Ni_(3.5-x)Co_(x) alloys

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Journal of Rare Earths 2024年第5期42卷 930-939,I0004页

作者： Xincong He Huazhou Hu Ruizhu Tang Wenhao zhou Houqun Xiao Xiaoxuan Zhang Chuanming ma Qingjun Chen School of Rare Earths University Science&Technology of ChinaHefei230026China Key Laboratory of Rare Earths Chinese Academy of SciencesJiangxi Institute of Rare EarthsGanjiang Innovation AcademyChinese Academy of SciencesGanzhou341000China

Superlattice hydrogen storage alloys offer a compelling advantage with rapid hydriding rate and high storage capacity.However,its practical applications face challenges including complex structure,low dehydriding capacity,and cyclic instability.In this work,we successfully prepared La_(0.66)Mg_(0.34)Ni_(3.5-x)Co_(x) superlattice hydrogen storage alloys with enhanced dehydriding capacity and stability by partially substituting Co for Ni.X-ray diffraction(XRD)refinements analysis reveals the presence of(La,Mg)_(3)Ni_(9),(La,Mg)_5Ni_(19),and LaNi_(5) phases within the alloy.Following Co substitution in the La_(0.06)Mg_(0.34)Ni_(3.4)Co_(0.1)alloy,there is a significant increase in content of the(La,Mg)_(3)Ni_(9) phase and a reduction in the hysteresis factor,resulting in an improved reversible hydrogen storage capacity from 1.45 wt%to 1.60 wt%.The dehydriding kinetics of the alloy is controlled by diffusion model with an activation energy of 8.40 kJ/mol.Furthermore,the dehydriding enthalpy value of the Co-substituted alloy decreases from 30.84 to 29.85 kJ/mol.Impressively,the cycling performance of the alloy after Co substitution exhibits excellent stability,with a capacity retention rate of 92.3%after 100 cycles.These findings provide valuable insights for the development of cost-effective hydrogen storage materials.

关键词： Superlattice hydrogen storage alloy Co substitution Microstructure Kinetics Thermodynamics Rare earths

Deactivation induced by metal sulfate over MnCeOx catalyst in NH_(3)-SCR reaction at low temperature

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Journal of Rare Earths 2024年第6期42卷 1056-1065,I0002页

作者： Qiao Xie Dongqi An Linsen zhou Tingzhen Li Zhenghua Hu Menghan Chen Menglan ma Lei Zhang Jingfang Sun Lin Dong School of Environmental and Chemical Engineering Chongqing Three Gorges UniversityChongqing404000China Key Laboratory of Water Environment Evolution and Pollution Control in the Three Gorges Reservoir Chongqing Three Gorges UniversityChongqing.404000China Jiangsu Key Laboratory of Vehicle Emissions Control Center of Modern AnalysisSchool of EnvironmentNanjing UniversityNanjing210093China Institute of materials China Academy of Engineering PhysicsMianyang621908China

Sulfate adsorption is one of the factors that cause the poisoning of catalyst in the low-temperature NH_(3) selective catalytic reduction reaction(NH_(3)-SCR).In this paper,by controlling the co-adsorption time of SO_(2) and O_(2) at 150℃,a range of sulfated MnCeOx catalysts with different contents of metal sulfate species were prepared to reveal the influence of metal sulfate species content on the catalytic performances and reaction mechanisms at low temperature.The catalytic activity below 250℃rapidly decreases with increasing metal sulfate species content.The results of characterizations shed light on the reduction of specific surface area,Mn^(4+)and Ce^(3+)content,and redox ability of MnCeOx owing to the formation of metal sulfate species.Further experiments reveal that metal sulfate species preferentially absorb on MnOx domains rather than on CeO_(2) domains,and the adsorbed metal sulfate species can suppress the Eley-Rideal and the Langmuir-Hinshelwood reaction mechanisms over the sulfated MnCeOx.All the above results are detrimental to the activity of sulfated MnCeOx in the low-temperature NH3-SCR reaction.

关键词： NH_(3)selective catalytic reduction MnCeOx catalyst Sulfation Low-temperature activity SO_(2)poisoning Rare earths

Dendritic mesoporous silica nanoparticles for enzyme immobilization

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Green Chemical Engineering 2024年第2期5卷 173-186页

作者： Shuling Zhang Jing Bai Weixi Kong Haolei Song Yunting Liu Guanhua Liu Li ma Liya zhou Yanjun Jiang School of Chemical Engineering and Technology Hebei University of TechnologyTianjin300130China College of Food Science and Biology Hebei University of Science&TechnologyShijiazhuang050018China Hebei Yanuo Bioscience Co. Ltd.Shijiazhuang052165China

Dendritic mesoporous silica nanoparticles(DMSNs)are a new class of solid porous materials used for enzyme immobilization support due to their intrinsic characteristics,including their unique open central-radial structures with large pore channels and their excellent biocompatibility.In this review,we review the recent progress in research on enzyme immobilization using DMSNs with different structures,namely,flower-like DMSNs and tree-branch-like DMSNs.Three DMSN synthesis methods are briefly compared,and the distinct characteristics of the two DMSN types and their effects on the catalytic performance of immobilized enzymes are comprehensively discussed.Possible directions for future research on enzyme immobilization using DMSNs are also proposed.

关键词： Dendritic mesoporous silica nanoparticles Enzyme immobilization Flower-like Tree-branch-like Central-radial structure

Confinement of Fe atoms between MoS_(2) interlayers drives phase transition for improved reactivity in Fenton-like reactions

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Nano Research 2024年第3期17卷 1132-1139页

作者： Yibing Sun Yu zhou Hongchao Li Chuan Wang Xuan Zhang Qian ma Yingchun Cheng Jieshu Qian Bingcai Pan Jiangsu Key Laboratory of Chemical Pollution Control and Resources Reuse School of Environmental and Biological EngineeringNanjing University of Science and TechnologyNanjing 210094China Key Laboratory of Flexible Electronics and Institute of Advanced materials Jiangsu National Synergetic Innovation Center for Advanced MaterialsNanjing Tech UniversityNanjing 211816China Department of General Dentistry Affiliated Stomatological Hospital of Nanjing Medical UniversityJiangsu Province Key Laboratory of Oral DiseasesNanjing 210029China Research Center for Environmental Nanotechnology(ReCENT) State Key Laboratory of Pollution Control and Resources ReuseSchool of EnvironmentNanjing UniversityNanjing 210023China

Phase manipulation of MoS_(2) from thermodynamically stable 2H phase to the unstable but more reactive 1T phase represents a crucial strategy for improving the reactivity in many reactions.The widely adopted wet chemistry approach uses intercalating entities especially alkali metal ions to achieve the phase transition;however,these entities are normally inert for the target reaction.Here,we describe the first use of iron atoms for the intercalation of 2H-MoS_(2) layers,driving the partial transition from 2H to 1T phase.Interestingly,in the peroxymonosulfate(PMS)-based Fenton-like reactions,the interlayered confinement of Fe atoms not only activates the inert basal plane,but also adds more reactive Fe sites for the formation of metal-PMS complex as primary reactive species for pollutant removal.In the degradation of a model pollutant carbamazepine(CBZ),the Fe-intercalated MoS_(2) exhibits a first order rate constant 13.3 times higher than 2H-MoS_(2).This strategy is a new direction for manipulating the phase composition and boosting the catalytic reactivity of MoS_(2)-based catalysts in various scenarios,including environmental remediation and energy applications.

关键词： confinement MoS_(2) Fe atoms Fenton-like reactions hydrogen evolution reaction

Si-Wu-Tang attenuates liver fibrosis via regulating lncRNA H19-dependent pathways involving cytoskeleton remodeling and ECM deposition

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Chinese Journal of Natural Medicines 2024年第1期22卷 31-46页

作者： QU Jiaorong XUE Xiaoyong WANG Zhixing ma Zhi JIA Kexin LI Fanghong ZHANG Yinhao WU Ruiyu zhou Fei ZHAO Piwen LI Xiaojiaoyang School of Life Sciences Beijing University of Chinese MedicineBeijing 100029China School of Chinese materia Medica Beijing University of Chinese MedicineBeijing 100029China State Key Laboratory of Medical Molecular Biology Department of Molecular Biology and BiochemistryInstitute of Basic Medical SciencesChinese Academy of Medical Sciences and Peking Union Medical CollegeBeijing 100005China

Liver fibrosis is a dynamic wound-healing response characterized by the agglutination of the extracellular matrix(ECM).Si-Wu-Tang(SWT),a traditional Chinese medicine(TCM)formula,is known for treating gynecological diseases and liver fibrosis.Our previous studies demonstrated that long non-coding RNA H19(H19)was markedly upregulated in fibrotic livers while its deficiency markedly reversed fibrogenesis.However,the mechanisms by which SWT influences H19 remain unclear.Thus,we established a bile duct ligation(BDL)-induced liver fibrosis model to evaluate the hepatoprotective effects of SWT on various cells in the liver.Our results showed that SWT markedly improved ECM deposition and bile duct reactions in the liver.Notably,SWT relieved liver fibrosis by regulating the transcription of genes involved in the cytoskeleton remodeling,primarily in hepatic stellate cells(HSCs),and influencing cytoskeleton-related angiogenesis and hepatocellular injury.This modulation collectively led to reduced ECM deposition.Through extensive bioinformatics analyses,we determined that H19 acted as a miRNA sponge and mainly inhibited miR-200,miR-211,and let7b,thereby regulating the above cellular regulatory pathways.Meanwhile,SWT reversed H19-related miRNAs and signaling pathways,diminishing ECM deposition and liver fibrosis.However,these protective effects of SWT were diminished with the overexpression of H19 in vivo.In conclusion,our study elucidates the underlying mechanisms of SWT from the perspective of H19-related signal networks and proposes a potential SWT-based therapeutic strategy for the treatment of liver fibrosis.

关键词： Liver fibrosis LncRNA H19 Si-Wu-Tang miRNAs Cytoskeleton ECM deposition

Aggregation-induced Emission Probe for Fluorescence/Photoacoustic Dual-modality Imaging and Photodynamic/Photothermal Treatment

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Chemical Research in Chinese Universities 2024年第2期40卷 293-304页

作者： CHEN Peiyu ZHANG Guoyang LI Jiguang ma Lijun zhou Jiaying ZHU Mingguang LI Shuo WANG Zhuo State Key Laboratory of Chemical Resource Engineering College of ChemistryBeijing Advanced Innovation Center for Soft Matter Science and EngineeringBeijing University of Chemical TechnologyBeijing100029P.R.China

The combination of near-infrared(NIR)fluorescence imaging(FLI)and photoacoustic imaging(PAI)can effectively compensate for each other’s inherent limitations,which can provide reliable and rich information on tumor biology.Therefore,the development of FL/PA dual-modality imaging probes is beneficial for achieving precision cancer diagnosis and treatment.Herein,we designed an efficient phototherapy agent methoxy bithiophene indene(OTIC),which was based on aggregation-induced emission(AIE)active fluorophores.To improve the water dispersion and enrichment of OTIC at the tumor site,OTIC nanoparticles(OTIC NPs)were prepared by a nanoprecipitation method.The balance between radiation and non-radiation energy dissipation was regulated by the strong donor-acceptor interaction and intramolecular motion.So OTIC NPs exhibited bright NIR fluorescence,photoacoustic signals,efficient generation of reactive oxygen species,and high photothermal conversion efficiency under NIR irradiation.Accurate imaging of the tumor and mice sentinel lymph nodes(SLNs)with OTIC NPs was visualized by NIR FL/PA dual-modal imaging.With the comprehensive imaging information provided by OTIC NPs in vivo,tumors were ablated under laser irradiation,which greatly improved the therapeutic efficacy.OTIC NPs would be possible to realize the precise guidance of FL/PA imaging for tumor treatment in the future clinical application.

关键词： Aggregation-induced emission Dual-modality imaging Photodynamic/photothermal treatment