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Molecular Ferroelastic Induced by Mono-/Double-Protonation Strategy

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Chinese Journal of Chemistry 2024年第15期42卷 1706-1712页

作者： Jia-qi luo Meng-Meng Lun qiang-qiang Jia Zhi-jie Wang Hai-Feng Lu Yi Zhang Da-Wei Fu Institute for Science and Applications of Molecular Ferroelectrics Key Laboratory of the Ministry of Education for Advanced Catalysis MaterialsZhejiang Normal UniversityJinhuaZhejiang 321004China Ordered Matter Science Research Center Jiangsu Key Laboratory for Science and Applications of Molecular FerroelectricsSoutheast UniversityNanjingJiangsu 211189China

Molecular ferroelastics with the natural features of mechanical flexibility and switchable spontaneous strain have attracted widespread attention in the scientific community due to their potential applications in tunable gratings,flexible memorizers,strain sensors,and intelligent ***,most designs of molecular ferroelastics remain in the stage of blind exploration,posing a challenge to achieve a functional ferroelastic more ***,we have successfully obtained a molecular ferroelastic,[Me_(2)NH(CH_(2))_(2)NH_(3)](ReO_(4))_(2)(Me_(2)NH(CH_(2))_(2)NH_(3)=N,N-dimethylethylenediammonium),under the guidance of the mono-/double-protonation ***_double-protonated[Me_(2)NH(CH_(2))_(2)NH_(3)](ReO_(4))_(2) undergoes a paraelastic-ferroelastic phase transition with the Aizu notation of 2/mFi at 322 ***,the theoretical calculation and experimental measurement simultaneously show that[Me_(2)NH(CH_(2))_(2)NH_(3)](ReO_(4))_(2) possesses good mechanical flexibility,because its elastic modulus(E)of 8.26 GPa and hardness(H)of 0.45 GPa are smaller than the average values of organic crystals(E of 12.05 GPa and H of 0.5 GPa),which makes it promising to apply in wearable pressure sensors,implantable medical sensors,high-precision tuners,*** work further enriches the molecular ferroelastic family and demonstrates that mono-/double-protonation is one of the effective molecular modification strategies for designing ferroelastics.

关键词： Molecular crystal Ferroelastic Mono-/double-protonation Mechanical flexibility Phase transition Crystal engineering Computational chemistry Molecular dynamics

An overview of prostate diseases and their characteristics specific to Asian men

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Asian Journal of Andrology 2012年第3期14卷 458-464,I0008页

作者： Shu-jie Xia Di Cui qi Jiang Department of Urology The First People's Hospital Affiliated to Shanghai Jiao Tong UniversityShanghai 200080China

In this paper, we reviewed the features of common prostate diseases, such as benign prostatic hyperplasia （BPH）, prostate cancer （PCa） and chronic prostatitis （CP） that are specific to Asian men. Compared to the Westerners, Asians exhibit particular characteristics of prostate diseases. Through summarizing the epidemiology, symptomatology, diagnostics and therapeutics of these diseases, we find that Asians have a lower incidence of PCa than whites, but the incidences of BPH and CP are similar. Asian men with CP often suffer from fewer disease sites, but have a higher frequency of pain during urination rather than after sexual climax. Prostate-specific antigen （PSA） is a widely used marker for the diagnosis of PCa in both Asian and Western countries. Although the PSA level may be lower in Asians, the threshold used is based on whites. After reviewing the treatments available for these diseases, we did not find a fundamental difference between Asians and whites. Furthermore, the selection for the most appropriate treatment based on the individual needs of patients remains a challenge to urologists in Asia. After considering the traits of prostate diseases that are specific to Asian men, we hope to pave the way for the development of specific diagnostic and therapeutic strategies targeted specifically to Asian men.

关键词： Asians benign prostatic hyperplasia chronic prostatitis prostate cancer

Influence of on-line tempering parameters on microstructure of medium-carbon steel

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Journal of Iron and Steel Research International 2017年第1期24卷 59-66页

作者： Hua Zhang Yan-xin Wu Jian-xun Fu jie Xu qi-jie Zhai State Key Laboratory of Advanced Special Steel Shanghai UniversityShanghai 200072China

A new process involving ultra-fast cooling（UFC）and on-line tempering（OLT）was proposed to displace austempering process,which usually implements in a salt/lead bath and brings out serious pollution in the industrial *** optimization of the new process,involving the evolution of the microstructure of medium-carbon steel during various cooling paths,was *** results show that the cooling path affected the final microstructure in terms of the fraction of pearlite,grain size and distribution of cementite in *** the cooling rate or decreasing the OLT temperature contributes to restraining the transformation from austenite to ferrite,and simultaneously retains more austenite for the transformation of *** is also noted that bainite was observed in the microstructure at the cooling rate of 45℃/s and the OLT temperature of 500℃.Through either increasing the cooling rate or decreasing the OLT temperature,the distribution of cementite in pearlite is more dispersed and grain is *** the possibility of industrial applications into account,the optimal process of cooling at 45℃/s followed by OLT at 600℃ after hot rolling was determined,which achieves a microstructure containing nearly full pearlite with an average grain size of approximately 7μm and a homogeneously dispersed distribution of cementite in pearlite.

关键词： Medium-carbon steel Ultra-fast cooling On-line tempering Phase transformation kinetics

Core Decomposition and Maintenance in Bipartite Graphs

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Tsinghua Science and Technology 2023年第2期28卷 292-309页

作者： Dongxiao Yu Lifang Zhang qi luo Xiuzhen Cheng Zhipeng Cai School of Computer Science and Technology Shandong UniversityQingdao 266237China Department of Computer Science Georgia State UniversityAtlantaGA 30303USA

The prevalence of graph data has brought a lot of attention to cohesive and dense subgraph *** contrast with the large number of indexes proposed to help mine dense subgraphs in general graphs,only very few indexes are proposed for the same in bipartite *** this work,we present the index called˛.ˇ/-core number on vertices,which reflects the maximal cohesive and dense subgraph a vertex can be in,to help enumerate the(α,β)-cores,a commonly used dense structure in bipartite *** address the problem of extremely high time and space cost for enumerating the(α,β)-cores,we first present a linear time and space algorithm for computing the˛.ˇ/-core numbers of *** further propose core maintenance algorithms,to update the core numbers of vertices when a graph changes by avoiding *** results on different real-world and synthetic datasets demonstrate the effectiveness and efficiency of our algorithms.

关键词： core decomposition core maintenance bipartite graph dense subgraph mining

Preload relaxation analysis and reliable life prediction of space connection and separation device based on accelerated degradation tests

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Chinese Journal of Aeronautics 2023年第3期36卷 202-211页

作者： Gen LIU qiong WU Zhihua WANG Yixin luo Yufeng qi School of Aeronautic Science and Engineering Beihang UniversityBeijing 100191China Institute of Spacecraft System Engineering China Academy of Space TechnologyBeijing 100081China

The safety and reliability of space connection and separation device has become a key issue due to the increasing service span of deep space exploration *** long-term preload relaxation(a key failure mode)of connection and separation devices is focused in this paper.A series of tests have been designed and implemented to investigate the preload relaxation regulation and a comprehensive method has been constructed to analyze and predict the reliable lifetime of the *** two-stage preload relaxation law of the device is found and reasonably *** to the different relaxation mechanism,the first-stage preload relaxation is assessed based on the working-condition test results,and the second-stage preload relaxation is characterized by accelerated test ***,the service reliability and reliable life are *** experiment and assessment results demonstrate the reasonability and effectiveness of the proposed method which can achieve long-service reliability analysis for space connection and separation device within limited time.

关键词： Accelerated degradation tests Life prediction Preload relaxation Reliability-analysis Space connection and separation device

Surface Modified Persistent Luminescence Probes for Biosensing and Bioimaging:A Review

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Chinese Journal of Chemistry 2021年第4期39卷 1009-1021页

作者： qiang luo Wenjie Wang jie Tan Quan Yuan Institute of Chemical Biology and Nanomedicine(ICBN) State Key Laboratory of Chemo/Biosensing and ChemometricsCollege of Chemistry and Chemical EngineeringHunan UniversityChangshaHunan410082 China Key Laboratory of Biomedical Polymers of Ministry of Education and Department of Chemistry College of Chemistry and Molecular SciencesWuhan UniversityWuhanHubei430072 China

Persistent luminescence materials(PLMs)are a class of unique luminescent materials that can remain luminescent for a few milliseconds to days without constant *** virtue of the super long decay time,PLMs have been extensively explored in biosensing and bioimaging applications to elimin ate autofluorescence interference and improve signal-to-noise ratio in complex samples and ***,nude PLMs often suffer from the poor stability,selectivity,and biocompatibility in biological system and in vivo,which greatly impedes their applications in biomedicine and ***,surface modification is a viable solution that endows PLMs with span-new features and can make PLMs suitable for organisms by altering PLMs’interaction with biological *** this review,commonly used strategies for surface modification of PLMs are briefly introduced,and the applications of surface modified PLMs in biosensing and bioimaging as well as their challenges are summarized.

关键词： Luminescence Nanoparticles Surface chemistry Biosensors Bioimaging

Preparation of CeO_(2) abrasives by reducing atmosphere-assisted molten salt method for enhancing their chemical mechanical polishing performance on SiO_(2)substrates

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Journal of Rare Earths 2023年第10期41卷 1627-1635,I0006页

作者： Ning Xu Jiahui Ma qi Liu Yuxin luo Yongping Pu School of Material Science and Engineering Shaanxi University of Science&TechnologyXi'an710021China Shaanxi Key Laboratory of Green Preparation and Functionalization for Inorganic Materials Xi'an710021China

Ce^(3+)as the active site on the CeO_(2)abrasive surface is the key to enhancing the material removal rate(MRR).The CeO_(2)abrasives with high chemical activity were prepared by the molten salt method under a reducing *** crystal structure and morphology of CeO_(2)abrasive s were characterized by X-ray diffraction(XRD),scanning electron microscopy(SEM),transmission electron microscopy(TEM),Fourier transform infrared spectroscopy(FT-IR),ultraviolet—visible diffuse reflectance spectroscopy(UV-Vis DRS),and X-ray photoelectron spectroscopy(XPS).The CeO_(2)abrasives were obtained under different atmospheres(Air,Ar,and Ar/H_(2)).With the enhancement of the reducing atmosphere,the morphology of the abrasives transforms from spherical to octahedral,while more oxygen vacancies and Ce^(3+)are generated on the surface of CeO_(2)*** CMP experiments show that the MRRs of the CeO_(2)-Air,CeO_(2)-Ar,and CeO_(2)-Ar/H_(2)abrasives on SiO_(2)substrates are 337.60,578.74,and 691.28 nm/min,***,as confirmed by atomic force microscopy(AFM),the substrate surfaces exhibit low roughness(20.5 nm)after being polished using all of the prepared ***,the MRR of CeO_(2)-Ar/H_(2)abrasives is increased by 104.76%compared with CeO_(2)-air *** improved CMP performance is attributed to the increased Ce^(3+)concentration and the octahedral morphology of the abrasives enhancing the chemical reaction and mechanical removal at the abrasive-substrate interface.

关键词： CeO_(2) Chemical mechanical polishing(CMP) Reducing atmosphere Material removal rate(MRR) Molten salt method Rare earths

Brominated Butyl Rubber Anticorrosive Coating and its Self-healing Behaviors

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Chinese Journal of Polymer Science 2023年第2期41卷 297-305页

作者： Guang-Bing luo Bo Pang Xing-qi luo Yi Wang Hong Zhou Li-Juan Zhao College of Chemistry and Materials Science Sichuan Normal UniversityChengdu610066China The Second Research Institute of Civil Aviation Administration of China(CAAC) Chengdu610041China

Self-healing anticorrosive coatings in extreme environment have attracted considerable interest from *** this work,4-tert-butylpyridine(TBP)was incorporated into brominated butyl rubber(BIIR)polymer networks to form a reversible ionic bond with the highly reactive bromine *** on the low glass transition temperature of the BIIR polymer and the electrostatic effects,a robust self-healing anticorrosive coating of TBP-BIIR was ***-BIIR coating showed a maximum protection efficiency(PE)of more than 94%(TBP-BIIR-acid,94.37%;TBP-BIIR-alkali,94.95%;TBP-BIIR-salt,95.49%)when treated with a strong acid(HNO_(3),pH=2),strong base(NaOH,pH=12)and high salt solution(3.5 wt%NaCl).In addition,the PE of coating repaired exceed 89%,and the maximum PE value was approximately 95%in different solutions,which demonstrated its extinguished self-healing *** results indicated that the TBP-BIIR anticorrosive coating could provide excellent safety and durability in special environment,which would be extremely beneficial to improve the working life of metal parts used in aviation and shipping,oil and gas and related industries.

关键词： Brominated butyl rubber Self-healing Anticorrosive Coating

Selective leaching of vanadium from V-Ti magnetite concentrates by pellet calcification roasting-H_(2)SO_(4) leaching process

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International Journal of Mining Science and Technology 2021年第3期31卷 507-513页

作者： Yi luo Xiaokui Che Xinglan Cui qi Zheng Lei Wang National Engineering Laboratory of Biohydrometallurgy GRINM Group Corp.Ltd.Beijing 101407China GRINM Resources and Environment Tech.Co. Ltd.Beijing 101407China General Research Institute for Nonferrous Metals Beijing 100088China

A novel method of pellet calcification roasting-H_(2)SO_(4) leaching was proposed to efficiently separate and extract vanadium(V)from vanadium-titanium(V-Ti)magnetite *** leaching rate of V is as high as 88.98%,while the leaching rate of impurity iron is only 1.79%.Moreover,the leached pellets can be used as raw materials for blast furnace ironmaking after secondary roasting.X-ray photoelectron spectroscopy(XPS)and scanning electron microscopy with energy dispersive X-ray spectrometry(SEMEDS)analyses showed that V^(3+)was oxidized to V^(5+)after roasting at 1200℃,and V^(5+)was then leached by H_(2)SO_(4).X-ray diffraction(XRD)analyses and single factor experiment revealed a minimal amount of dissolved Fe_(2)O_(3) during H_(2)SO_(4) ***,a high separation degree of V and iron(Fe)from V-Ti magnetite concentrate was achieved through H_(2)SO_(4) *** with the traditional roastingleaching process,this process can achieve a high selectivity of V and Fe,and has excellent prospects for industrial production.

关键词： Selective leaching Vanadium V-Ti magnetite concentrate Pellets Sulfuric acid