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Hydrothermal synthesis of polyimide-linked covalent organic frameworks towards ultrafast and stable cathodic sodium storage

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Science China Chemistry 2024年第4期67卷 1300-1310页

作者： Xiya Yang Lei Gong zhixin liu Qianjun Zhi Baoqiu Yu Xin Chen Kang Wang Xiaofeng Li Dongdong Qi Jianzhuang Jiang Beijing Advanced Innovation Center for Materials Genome Engineering Beijing Key Laboratory for Science and Application of Functional Molecular and Crystalline MaterialsDepartment of Chemistry and Chemical EngineeringSchool of Chemistry and Biological EngineeringUniversity of Science and Technology BeijingBeijing 100083China State Key Laboratory of Organic-Inorganic Composites College of Materials Science and EngineeringBeijing University of Chemical TechnologyBeijing 100029China

Redox-active organic materials are capturing growing attention as cathode materials for sustainable alkaline metal ion batteries.However,the storage of Na+in most organic materials-based cathodes is plagued by low capacity and unsatisfying rate performance due to their low active site densities and limited exposed active sites.Herein,two polyimide-linked covalent organic frameworks(COFs),namely HATN-PD-COF and HATN-TAB-COF,were fabricated from hydrothermal synthesis with redoxactive triphenylene-2,3,6,7,10,11-hexacarboxylic acid and aromatic amines as starting materials.Powder X-ray diffraction and electron microscopy analysis indicate the high crystalline nature of these COFs with AA stacking configuration and orderly mesoporous tunnel.N_(2) sorption measurement discloses the permanent porosity of these two COFs with a Brunauer-EmmettTeller surface area of 1,065-1,200 m^(2)g^(-1)and a large pore size of 2.0-3.1 nm.Galvanostatic intermittent titration technique and density functional theory calculations reveal the facile Na+ion diffusion along the mesoporous tunnel of these COFs with a small energy barrier of 0.13-0.40 e V.In particular,the as-prepared COFs based-cathodes show ultrafast and stable Na+storage associated with their conjugated electronic structure,highly ordered mesoporous tunnel,robust structure,and redox-active C=N/C=O-rich framework as exemplified by the high reversible capacity of 210 m A h g^(-1)at 200 m A g^(-1),record-high rate performance(195 m A h g^(-1)at a high current density of 10,000 m A g^(-1))among organic electrodes and the capacity retention of nearly 91%at 10,000 m A g^(-1)after 7,000 cycles for HATN-PD-COF.

关键词： covalent organic framework sodium ion battery cathode high rate organic electrode

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Distributed Least Squares Algorithm of Continuous-Time Stochastic Regression Model Based on Sampled Data

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Journal of Systems Science & Complexity 2024年第2期37卷 609-628页

作者： ZHU Xinghua GAN Die liu zhixin The Key Laboratory of Systems and Control Academy of Mathematics and Systems ScienceChinese Academy of Sciencesand School of Mathematical SciencesUniversity of Chinese Academy of SciencesBeijing 100190China Zhongguancun Laboratory Beijing 100094China

In this paper,the authors consider the distributed adaptive identification problem over sensor networks using sampled data,where the dynamics of each sensor is described by a stochastic differential equation.By minimizing a local objective function at sampling time instants,the authors propose an online distributed least squares algorithm based on sampled data.A cooperative non-persistent excitation condition is introduced,under which the convergence results of the proposed algorithm are established by properly choosing the sampling time interval.The upper bound on the accumulative regret of the adaptive predictor can also be provided.Finally,the authors demonstrate the cooperative effect of multiple sensors in the estimation of unknown parameters by computer simulations.

关键词： Cooperative excitation condition distributed least squares regret sampled data stochastic differential equation

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Low-temperature plasma induced phosphate groups onto coffee residue-derived porous carbon for efficient U(Ⅵ) extraction

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Journal of Environmental Sciences 2022年第12期34卷 1-13页

作者： Zhongshan Chen Xuan He Qian Li Hui Yang Yang liu Lining Wu zhixin liu Baowei Hu Xiangke Wang School of Life Science Shaoxing UniversityShaoxing 312000China College of Environmental Science and Engineering North China Electric Power UniversityBeijing 102206China School of Energy Power and Mechanical Engineering North China Electric Power UniversityBeijing 102206Chin

For the continuous utilization of nuclear energy and efficient control of radioactive pollution, low-cost materials with high efficient U(VI) removal are of great importance. In this study, low temperature plasma method was applied for the successful modification of Ophosphorylethanolamine(O-PEA) on the porous carbon materials. The produced materials(Cafe/O-PEA) could adsorb U(VI) efficiently with the maximum sorption capacity of 648.54mg/g at 1 hr, T=298 K, and p H=6.0, much higher than those of most carbon-based composites. U(VI) sorption was mainly controlled by strong surface complexation. From FTIR,SEM-EDS and XPS analyses, the sorption of U(VI) was related to the complexation with-NH2, phosphate and-OH groups on Cafe/O-PEA. The low temperature plasma method was an efficient, environmentally friendly and low-cost method for surface modification of materials for the effective enrichment of U(VI) from aqueous solutions.

关键词： U(Ⅵ) Coffee residue Porous carbon Low-temperature plasma modification

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Distributed robust power control in two-tier vehicle networks under uncertain channel environments

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Digital Communications and Networks 2023年第3期9卷 734-742页

作者： zhixin liu Jiawei Su Yuan-ai Xie Yazhou Yuan Yi Yang Xinping Guan School of Electrical Engineering Yanshan UniversityQinhuangdao066004China School of Electronic Information and Electrical EngineeringShanghai Jiao Tong UniversityShanghai200240China

This paper proposes a novel optimization scheme to support stable and reliable vehicle-to-everything connections in two-tier networks,where the uplink channel of the cellular user is reused by underlay vehicle-to-vehicle communications.However,considering complex channel fading and high-speed vehicle movement,the cer-tainty assumption is impractical and fails to maintain power control strategy in reality in the traditional statical vehicular networks.Rather than the perfect channel state information assumption,the first-order Gauss-Markov process which is a probabilistic model affected by vehicle speed and fading is introduced to describe imperfect channel gains.Moreover,interference management is a major challenge in reusing communications,especially in uncertain channel environments.Power control is an effective way to realize interference management,and optimal power allocation can ensure that interference of the user meets the communication requirements.In this study,the sum-rate-oriented power control scheme and minimum-rate-oriented power control scheme were implemented to manage interference and satisfy different design objectives.Since both of these schemes are non-convex and intractable,the Bernstein approximation and successive convex approximation methods were adopted to transform the original problems into convex ones.Furthermore,a novel distributed robust power control al-gorithm was developed to determine the optimal solutions.The performance of the algorithm was evaluated through numerical simulations,and the results indicate that the proposed algorithm is effective in vehicular communication networks with uncertain channel environments.

关键词： Vehicle-to-Everything communications Vehicular two-tier networks Channel uncertainty Power control

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Single-cell and spatial multi-omics in the plant sciences:Technical advances,applications,and perspectives

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Plant Communications 2023年第3期4卷 18-31页

作者： Xiaole Yu zhixin liu Xuwu Sun State Key Laboratory of Cotton Biology State Key Laboratory of Crop Stress Adaptation and ImprovementKey Laboratory of Plant Stress BiologySchool of Life SciencesHenan University85 Minglun StreetKaifeng 475001P.R.China

Plants contain a large number of cell types and exhibit complex regulatory mechanisms.Studies at the single-cell level have gradually become more common in plant science.Single-cell transcriptomics,spatial transcriptomics,and spatial metabolomics techniques have been combined to analyze plant development.These techniques have been used to study the transcriptomes and metabolomes of plant tissues at the single-cell level,enabling the systematic investigation of gene expression and metabolism in specific tissues and cell types during defined developmental stages.In this review,we present an overview of significant breakthroughs in spatial multi-omics in plants,and we discuss how these approaches may soon play essential roles in plant research.

关键词： mass spectrometry imaging plants single-cell transcriptomics spatial transcriptomics spatial metabolomics

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Field distribution of the Z_(2)topological edge state revealed by cathodoluminescence nanoscopy

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Opto-Electronic Advances 2022年第4期5卷 76-84页

作者： Xiao He Donglin liu Hongfei Wang Liheng Zheng Bo Xu Biye Xie Meiling Jiang zhixin liu Jin Zhang Minghui Lu Zheyu Fang School of Physics State Key Lab for Mesoscopic PhysicsAcademy for Advanced Interdisciplinary StudiesCollaborative Innovation Center of Quantum Matterand Nano-optoelectronics Frontier Center of Ministry of EducationPeking University Yangtze Delta Institute of OptoelectronicsPeking UniversityBeijing 100871China National Laboratory of Solid State Microstructures Department of Materials Science and EngineeringNanjing UniversityNanjing 210093China College of Chemistry and Molecular Engineering Peking UniversityBeijing 100871China Department of Physics and HKU-UCAS Joint Institute for Theoretical and Computational Physics at Hong Kong the University of Hong KongPokfulam RoadHong KongChina

Photonic topological insulators with robust boundary states can enable great applications for optical communication and quantum emission,such as unidirectional waveguide and single-mode laser.However,because of the diffraction limit of light,the physical insight of topological resonance remains unexplored in detail,like the dark line that exists with the crys-talline symmetry-protected topological edge state.Here,we experimentally observe the dark line of the Z_(2)photonic topo-logical insulator in the visible range by photoluminescence and specify its location by cathodoluminescence characteriza-tion,and elucidate its mechanism with the p-d orbital electromagnetic field distribution which calculated by numerical sim-ulation.Our investigation provides a deeper understanding of Z_(2)topological edge states and may have great signific-ance to the design of future on-chip topological devices.

关键词： photonic topological insulator edge state cathodoluminescence TMDC

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Characteristics of gut microbiota determine effects of specific probiotics strains in patients with functional constipation

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Chinese Medical Journal 2024年第1期137卷 120-122页

作者： Haohao Zhang Lijuan Sun zhixin Zhao Yao Zhou Yuyao liu Nannan Zhang Junya Yan Shibo Wang Renlong Li Jing Zhang Xueying Wang Wenjiao Li Yan Pan Meixia Wang Bing Luo Mengbin Li Zhihong Sun Yongxiang Zhao Yongzhan Nie State Key Laboratory of Targeting Oncology National Center for International Research of Bio-targeting TheranosticsGuangxi Key Laboratory of Bio-targeting TheranosticsCollaborative Innovation Center for Targeting Tumor Diagnosis and TherapyGuangxi Talent Highland of Bio-targeting TheranosticsGuangxi Medical UniversityNanningGuangxi 530021China State Key Laboratory of Holistic Integrative Management of Gastrointestinal Cancers and National Clinical Research Center for Digestive Diseases Xijing Hospital of Digestive DiseasesFourth Military Medical UniversityXi’anShaanxi 710032China Key Laboratory of Resource Biology and Biotechnology in Western China Ministry of EducationSchool of MedicineNorthwest UniversityXi’anShaanxi 710000China Key Laboratory of Dairy Biotechnology and Engineering Ministry of EducationKey Laboratory of Dairy Products ProcessingMinistry of Agriculture and Rural AffairsInner Mongolia Key Laboratory of Dairy Biotechnology and EngineeringInner Mongolia Agricultural UniversityHohhotInner Mongolia 010018China

To the Editor:Probiotics are a promising treatment modality for functional constipation(FC);however,the factors affecting individual responses to probiotics remain unclear.Growing evidence has identified that there is a strong relationship among the gut microbiota and constipation and related gut-brain axis.[1]The gut microbiota may modulate the gut functions via gut metabolites or trigger the release of gut hormones,such as peptide YY,gastric inhibitory polypeptide,and 5-hydroxytryptamine.[2]In turn,gut hormones affect gut secretion,motility,and sensation through their receptors located on epithelial,enteric,and smooth muscle cells.[2]Based on these findings,exogenous probiotics have been used in patients with constipation;however,few have produced consistent results.[3]In this study,we investigated the efficacy and safety of several specific probiotics strains for constipation,and also examined the potential reasons for the individualized effects of probiotics,which may facilitate interventional decisionmaking for FC patients.

关键词： constipation patients sensation

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Comparison of the pathological characteristics of uninjured skin tissues of diabetic rodents and diabetic patients

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中华内分泌外科杂志（中英文） 2024年第3期18卷 339-345页

作者： Du Juan liu Ying Zhu Anfeng Song Dongming Qu Shiguang Yuan zhixin Emergency Critical and Translational Medicine LaboratoryJilin Province People’s HospitalChangchun 130021China Emergency Medicine Department of General Hospital of Northern Theater Command Laboratory of Rescue Center of Severe Wound and Trauma PLAShenyang 110016China Department of Pathology the Centre Hospital of ChangchunChangchun 130021China Department of Emergency Surgery Jilin Province People’s HospitalChangchun 130021China

Objective To study uninjured diabetic skin structure and compare the pathological characteristics of skin tissue from mouse and rat models of diabetes mellitus(DM)and humans with DM.Methods Establishing the DM C57BL/6J mice skin tissue models and db/db mice skin tissue models,as well as DM rat skin tissue models.Skin tissues were collected from the animal models and DM patients.The biopsy specimens were stained with hematoxylin and eosin(HE)staining,Masson trichrome staining and periodic acid-Schiff(PAS)staining.Results(1)Skin from mice with streptozotocin(STZ)-induced DM was thinner and had less hair than skin from control mice.The epidermis had abnormal keratinization and dermal collagen and elastin fibers were dense and significantly atrophied.(2)Compared with the control group,skin tissue from db/db mice was thinner and had less hair.There was no aberrant keratinization in the epidermis,and dermal collagen and elastin fibres were loose.(3)Skin tissue from rats with STZ-induced DM was significantly thinner than control skin.The epidermis had mildly abnormal keratinization,and the dermis layer was atrophied and partly loose.Some focal lipofuscin was deposited.(4)Whole skin tissue from patients with diabetes was significantly thinner than skin from subjects without DM.The epidermis had mild hyper keratinization,and the dermal elastin fibers were atrophied,loose,irregular,and showed focal mucoid degeneration.Conclusions Uninjured DM skin tissues were thinner and more irregular than normal skin.Structural changes in rat DM skin were most like those seen in the skin of patients with DM.

关键词： Diabetes mellitus Skin Human Mouse Rat

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A novel coumarin derivative DBH2 inhibits proliferation and induces apoptosis of chronic myeloid leukemia cells

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Genes & Diseases 2023年第2期10卷 596-607页

作者： Jiajia Xin Huijie Zhang Dandan Yin Ning An Yaozhen Chen Jinmei Xu Jing Zhang zhixin liu Yongsheng liu Wen Yin Mingkai Li Xingbin Hu Department of Blood Transfusion Xijing HospitalAir Force Medical UniversityXi’anShaanxi 710032China Key Laboratory of Biochemistry and Molecular Pharmacology of Chongqing Chongqing Medical UniversityChongqing 400016China Department of Hematology Tangdu HospitalAir Force Medical UniversityXi’anShaanxi 710038China Department of Pharmacology School of PharmacyAir Force Medical UniversityXi’anShaanxi 710032China

With the development of tyrosine kinase inhibitor(TKI)resistance,finding the novel effective chemotherapeutic agent is of seminal importance for chronic myelogenous leukemia(CML)treatment.This study aims to find the effective anti-leukemic candidates and investigate the possible underlying mechanism.We synthesized the novel coumarin derivatives and evaluated their anti-leukemic activity.Cell viability assay revealed that compound DBH2 exhibited the potent inhibitory activity on the proliferation of CML K562 cells and TKI resistant K562 cells.Morphological observation and flow cytometry confirmed that DBH2 could selectively induce cell apoptosis and cell cycle arrest at G2/M phase of the K562 cells,which was further confirmed on the bone marrow cells from CML transgenic model mice and CD34+bone marrow leukemic cells from CML patients.Treatments of DBH2 in combination with imatinib could prolong the survival rate of SCL-tTA-BCR/ABL transgenic model mice significantly.Quantitative RT-PCR revealed that DBH2 inhibited the expression of STAT3 and STAT5 in K562 cells,and caspase-3 knockout alleviated the DBH2 induced apoptosis.Furthermore,DBH2 could induce the expression of PARP1 and ROCK1 in K562 cells,which may play the important role in caspase-dependent apoptosis.Our results concluded that coumarin derivative DBH2 serves as a promising candidate for the CML treatment,especially in the combination with imatinib for the TKI resistant CML,and STAT/caspase-3 pathway was involved in the molecular mechanism of anti-leukemic activity of DBH2.

关键词： Apoptosis Caspase Chronic myeloid leukemia Coumarin STAT

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Vampyroteuthis pseudoinfernalis sp. nov.: the second extant widespread deep sea squid species of Vampyromorpha(Cephalopoda: Coleoidea)

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Zoological Systematics 2024年第3期 246-257页

作者： Dajun Qiu Bilin liu Yupei Guo Wijesooriya A.S.W.Lakmini Yehui Tan Gang Li zhixin Ke Kaizhi Li Liangmin Huang CAS Key Laboratory of Tropical Marine Bio-resources and Ecology South China Sea Institute of Oceanology Chinese Academy of Sciences University of Chinese Academy of Sciences College of Marine Sciences Shanghai Ocean University

The vampire squid, Vampyroteuthis infernalis Chun, 1903, is currently the only extant species in the family Vampyroteuthidae Chun, 1903. However, specimens from the Gulf of Guinea, Africa, and California suggested the possibility of additional taxa. Here, we report the second species of Vampyroteuthis, collected from the South China Sea, China, which differs from V. infernalis by its tail shape, lower beak, photophores position, and the phylogenetic analysis of mitochondrial COI and nuclear large subunit ribosomal DNA(LSU) sequences: V. infernalis present by the lacking of the tail, photophores located approximately one-third of the points between the fins and end, and the lower beak with a broad, short wing; V. pseudoinfernalis Qiu, liu & Huang, sp. nov. present by an acuate tail, a pair of photophores located at the midpoints between the fins and tail, and a lower beak with a broad, elongate wing.

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