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Decadal length-of-day and geomagnetic changes imply more complex Earth’s core motions

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Science Bulletin 2024年第13期69卷 2038-2041页

作者： Hao ding Jiancheng li Weiping Jiang Wenbin Shen School of Geodesy and Geomatics Hubei Luojia LaboratoryWuhan UniversityWuhan 430079China GNSS Research Center Wuhan UniversityWuhan 430079China

Since the 1950s,the length-of-day variations(DLOD)of the Earth’s rotation have received extensive attention and research in various fields,including geodynamics,geomagnetism,geodesy,seismology,geology,marine science,environmental science,and even biology and *** the abundance of related studies and notable advancements,the underlying mechanism behind the decadal changes in DLOD remains a persistent unresolved *** essential aspect of investigating this issue lies in its potential to unveil the Earth’s core motions[1,2].Despite the presence of various hypothesized and constructed models about the Earth’s core motions,these models typically exhibit simplicity.

关键词： Earth geology geomagnetic

Modification of liMn_(0.6)Fe_(0.4)PO_(4)lithium-ion battery cathode materials with a fluorine-doped carbon coating

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Particuology 2024年第9期92卷 278-287页

作者： Debao Pan Ziyuan liu Chengping li Rundong Wan Jinsong Wang Jiangzhao Chen ding Wang Jinkun liu yingjie Zhang Jianhong yi Rui Bao Zhengfu Zhang Peng Dong Faculty of Materials Science and Engineering Kunming University of Science and TechnologyKunming 650093China Faculty of Metallurgical and Energy Engineering Kunming University of Science and TechnologyKunming 650093China

In this study,glucose and NH4F were utilized as sources of carbon and fluorine,respectively,for the synthesis of liMn_(0.6)Fe_(0.4)PO_(4)(LMFP)*** nanoscales were subsequently modified with varying levels of fluorine-doped carbon through co-precipitation and mechanical ball milling *** LMFP,incorporating carbon and varying levels of fluoride ions,exhibit higher specific discharge capacities at 0.2 Cand electrochemical characteristics compared to the original LMFP coated solely with *** inclusion of fluorine-doped carbon in the composite material creates numerous pathways for expeditious electron ***,the partial formation of metal fluoride at the interface between the surface of LMFP and the layer of carbon coating doped with fluorine enhances the reduction in the charge-transfer *** modified ferromanganese phosphate cathode material reveals an outstanding discharge capacity displaying a reversible discharge specific capacity value of 131.73 mA h g^(−1)at 10C and 154.6 mA h g^(−1)at 0.2C,due to its unique structure.

关键词： lithium manganese iron phosphate Anode Electrochemical Fluorine-doped carbon

Error-based adaptive optimal tracking control of nonlinear discrete-time systems

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Science China(Information Sciences) 2024年第1期67卷 154-167页

作者： Chun li Jinliang ding Frank L.LEWIS Tianyou CHAI State Key Laboratory of Synthetical Automation for Process Industries Northeastern University UTA Research Institute The University of Texas at Arlington

In this paper,for the output tracking problem of nonlinear discrete-time systems,a performance index is newly defined using the adaptive dynamic programming(ADP) technique to completely eliminate tracking errors in *** contrast to traditional definitions of performance indices in other ADP-based methods,the proposed performance index is not only designed from the perspective of output tracking errors but also introduced errors of system states and control inputs at adjacent stages,which is suitable for practical situations in many industrial applications,such as the alumina production,the flotation process,and the mineral grinding *** proved that the obtained controller can make the system output fully track the given reference trajectory by applying the iterative criteria of the ADP *** addition,the proposed algorithm was implemented using a data-driven technique and neural networks to avoid analyzing and deducing the complicated dynamics of actual industrial ***,using historical data for a forced-circulation evaporation system in the alumina production process,the effect of the proposed approach was verified through a numerical simulation and compared with that of the proportional-integral controller.

关键词： adaptive dynamic programming iterative criteria performance index tracking errors tracking problem

Approaching high oxygen evolution reaction performance by synergetic dual-ion leaching

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Nano Research 2024年第9期17卷 7975-7983页

作者： Hancheng Ma Yao ding Jianqi li Wei Peng liqiang Mai School of Materials Science and Engineering Wuhan University of TechnologyWuhan 430070China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China

Self-reconstruction of catalysts during oxygen evolution reaction(OER)is crucial for the development of energy conversion ***,the relationship between the specific atomic structure of pre-catalysts and their electrocatalytic behavior after reconstruction via dual-ion leaching has not been extensively *** this work,we design a highly effective non-noble metal OER catalyst with heterointerface through continuous self-reconstruction of Co_(2)(OH)_(3)Cl@NiMoO_(4)as pre-catalyst by a straightforward dual-ion(***_(4)^(2-)and Cl^(-))***-situ Raman and in-situ Fourier transform infrared(FT-IR)spectroscopy have precisely identified the progressive phase transformation of the pre-catalyst during self-reconstruction,which results in a stable heterojunction of CoOOH and NiOOH(CoOOH@NiOOH).Further calculations based on density functional theory(DFT)of CoOOH@NiOOH evident that more electrons will be aggregated in the Fermi level of ***,Gibbs free energy(ΔG)for different OER steps of CoOOH@NiOOH exhibit lower energy costs of all intermediates,implying the well catalytic ***,the catalyst derived from dual-ion leaching displays outstanding OER performance,characterized by an overpotential of 275 mV at a current density of 10 mA·cm^(-2)and exceptional stability over 12 h *** work successfully paves a way of finding high-performance OER catalysts based on non-noble metal through dual-ion leaching during self-reconstruction.

关键词： dual-ion leaching oxygen evolution reaction chemical reconstruction NiMoO_(4) Co_(2)(OH)_(3)Cl

living/controlled polymerization of vinylpyridines into sequence-regulated copolymers by Lewis pair

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Science China Chemistry 2024年第8期67卷 2737-2746页

作者： Qiankun ding Wuchao Zhao Fukuan li Jianghua He Yuetao Zhang Department of State Key Laboratory of Supramolecular Structure and Materials College of ChemistryJilin UniversityChangchun 130012China

The poly(vinylpyridine)(PVP) based(co)polymers are of particular interest in materials science, due to their multifunctionality and diverse applications. So far, there is no report on the sequence-regulated copolymerization of vinylpyridines(VPs) and methacrylate monomer in one-step manner yet. Here we designed and synthesized a series of guanidine phosphines as Lewis base(LB), which is combined with bulky organoaluminium to construct Lewis pairs(LPs) for polymerization of VPs. The living/controlled polymerization of 4-vinylpyridine(4-VP) or 2-vinylpyridine(2-VP) can be accomplished with remarkable efficiency by such Lewis pair polymerization(LPP), furnishing polymers with high molecular weight(up to 288 kg/mol) and narrow molecular weight distribution(as low as 1.17). Mechanistic studies reveal the interaction of LPs and formation of zwitterionic intermediates, providing solid evidences to support the proposed polymerization mechanism. More importantly, by simply adjusting the LA dosage, this LPP strategy realizes the unprecedented control over the sequence regulation of 2-VP-based copolymers from gradient to block in one-step manner, regardless of the monomer ratio, which greatly expands the versatility of the LPP.

关键词： guanidine phosphine Lewis pair polymerization living/controlled polymerization vinyl pyridine sequence regulation

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Low-intensity pulsed ultrasound reduces alveolar bone resorption during orthodontic treatment via Lamin A/C-Yes-associated protein axis in stem cells

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World Journal of Stem Cells 2024年第3期16卷 267-286页

作者： Tong Wu Fu Zheng Hong-yi Tang Hua-Zhi li Xin-Yu Cui Shuai ding Duo liu Cui-ying li Jiu-Hui Jiang Rui-li Yang Department of Orthodontics Peking University School and Hospital of StomatologyNational Engineering Laboratory for Digital and Material Technology of StomatologyBeijing Key Laboratory of Digital StomatologyBeijing 100081China Department of Central Laboratory Peking University School and Hospital of StomatologyNational Clinical Research Center for Oral Diseases&National Engineering Laboratory for Digital and Material Technology of StomatologyBeijing Key Laboratory of Digital StomatologyBeijing 100081China

BACKGROUND The bone remodeling during orthodontic treatment for malocclusion often requires a long duration of around two to three years,which also may lead to some complications such as alveolar bone resorption or tooth root ***-intensity pulsed ultrasound(liPUS),a noninvasive physical therapy,has been shown to promote bone fracture *** is also reported that liPUS could reduce the duration of orthodontic treatment;however,how liPUS regulates the bone metabolism during the orthodontic treatment process is still *** To investigate the effects of liPUS on bone remodeling in an orthodontic tooth movement(OTM)model and explore the underlying *** A rat model of OTM was established,and alveolar bone remodeling and tooth movement rate were evaluated via micro-computed tomography and staining of tissue *** vitro,human bone marrow mesenchymal stem cells(hBMSCs)were isolated to detect their osteogenic differentiation potential under compression and liPUS stimulation by quantitative reverse transcription-polymerase chain reaction,Western blot,alkaline phosphatase(ALP)staining,and Alizarin red *** expression of Yes-associated protein(YAP1),the actin cytoskeleton,and the Lamin A/C nucleoskeleton were detected with or without YAP1 small interfering RNA(siRNA)application via *** The force treatment inhibited the osteogenic differentiation potential of hBMSCs;moreover,the expression of osteogenesis markers,such as type 1 collagen(COL1),runt-related transcription factor 2,ALP,and osteocalcin(OCN),*** could rescue the osteogenic differentiation of hBMSCs with increased expression of osteogenic marker inhibited by ***,the expression of LaminA/C,F-actin,and YAP1 was downregulated after force treatment,which could be rescued by ***,the osteogenic differentiation of hBMSCs increased by liPUS could be attenuated by YAP siRNA ***,liPUS increased alveolar

关键词： Low-intensity pulsed ultrasound Bone resorption Osteogenesis Cytoskeleton-Lamin A/C-Yes-associated protein axis Bone marrow mesenchymal stem cells Orthodontic tooth movement

Carbon Dots as“On–Off–On”Fluorescence Sensors for Selective and Consecutive Detection of 4-Nitrophenol and Cerium(IV)in Water Samples

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Journal of Analysis and Testing 2024年第2期8卷 201-209页

作者： Jing Yang Hao liu Yan Huang li li Huajie liu Yaping ding Department of Chemistry College of SciencesShanghai UniversityShanghai200444China School of Chemical Science and Engineering Tongji UniversityShanghai200092China

An“on–off–on”fluorescence sensor was designed for rapidly and consecutively detecting 4-nitrophenol and cerium(IV)without the use of any labeling *** yellow carbon dots were synthesized by a simple one-step hydrothermal approach,and various techniques were applied to investigate the morphology,structure,and optical properties of the carbon *** the optimal experimental conditions,4-nitrophenol rapidly quenched the fluorescence of carbon dots as a result of the inner filter eff ect(IFE).The fluorescence intensity of carbon dots was linear with the concentration of 4-nitrophenol(1–150μmol/L)and the limit of detection was 0.32μmol/*** fluorescence was gradually recovered as the cerium(IV)concentration(0.5–100μmol/L)increased in CDs/4-NP,and the limit of detection was 0.16μmol/*** sensor showed good selectivity and demonstrated high accuracy for the analysis of 4-nitrophenol and cerium(IV)in actual water samples.

关键词： Carbon dots Fluorescence sensor 4-Nitrophenol Cerium(IV) Water samples

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Ultrasonic enhancement of persulfate oxidation system governs emerging pollutants decontamination

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GREEN ENERGY & ENVIRONMENT 2024年第11期9卷 1666-1678页

作者： li, Yanpan Zhou, Yanbo Zhou, yi East China Univ Sci & Technol Natl Engn Res Ctr Ind Wastewater Detoxicat & Resou State Environm Protect Key Lab Environm Risk Asses 130 Meilong Rd Shanghai 200237 Peoples R China East China Univ Sci & Technol Shanghai Engn Res Ctr Multimedia Environm Catalysi 130 Meilong Rd Shanghai 200237 Peoples R China Shanghai Inst Pollut Control & Ecol Secur Shanghai 200092 Peoples R China

Emerging contaminants (ECs) are widely present in aquatic environments, posing potential risks to both ecosystems and human health. The ultrasound-assisted persulfate oxidation process has attracted considerable attention in the degradation of ECs due to its ability to generate both sulfate radicals and cavitation effects, enhancing degradation effects. In this paper, the principle of ultrasonic synergistic Fenton-like oxidation system for degrading organic pollutants was reviewed, divided into homogeneous system, non-homogeneous system, and single-atom system to explore the synergistic effect of ultrasound-enhanced persulfate technology in three aspects, and the effects of environmental factors such as ultrasonic frequency and power, system pH, temperature, and initial oxidant concentration on the system's decontamination performance were discussed. Finally, future research on ultrasonically activated persulfate technology is summarized and prospected. (c) 2024 Institute of Process Engineering, Chinese Academy of Sciences. Publishing services by Elsevier B.V. on behalf of KeAi Communications Co., Ltd. This is an open access article under the CC BY-NC-ND license (http://***/licenses/by-nc-nd/4.0/).

关键词： Ultrasound Persulfate Emerging contaminants Reaction mechanism Synergistic effects NAPHTHOL BLUE BLACK SONOCATALYTIC DEGRADATION ACTIVATED PERSULFATE WASTE-WATER SONOCHEMICAL DEGRADATION REMOVAL NANOPARTICLES KINETICS PEROXYMONOSULFATE NANOCOMPOSITE

Epigenetic modification in liver fibrosis:Promising therapeutic direction with significant challenges ahead

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Acta Pharmaceutica Sinica B 2024年第3期14卷 1009-1029页

作者： Runping liu Yajing li Qi Zheng Mingning ding Huiping Zhou Xiaojiaoyang li School of Chinese Materia Medica Beijing University of Chinese MedicineBeijing 102400China School of life Sciences Beijing University of Chinese MedicineBeijing 102400China Department of Microbiology and Immunology Virginia Commonwealth UniversityRichmondVA 22460USA

liver fibrosis,characterized by scar tissue formation,can ultimately result in liver ***’s a major cause of morbidity and mortality globally,often associated with chronic liver diseases like hepatitis or alcoholic and non-alcoholic fatty liver ***,current treatment options are limited,highlighting the urgent need for the development of new *** a reversible regulatory mechanism,epigenetic modification is implicated in many biological processes,including liver *** the epigenetic mechanisms involved in liver fibrosis could provide valuable insights into developing new treatments for chronic liver diseases,although the current evidence is still *** review provides a comprehensive summary of the regulatory mechanisms and critical targets of epigenetic modifications,including DNA methylation,histone modification,and RNA modification,in liver fibrotic *** potential cooperation of different epigenetic modifications in promoting fibrogenesis was also ***,available agonists or inhibitors regulating these epigenetic mechanisms and their potential application in preventing liver fibrosis were *** summary,elucidating specific druggable epigenetic targets and developing more selective and specific candidate medicines may represent a promising approach with bright prospects for the treatment of chronic liver diseases.

关键词： liver fibrosis Epigenetics regulation DNA methylation Histone acetylation Histone methylation mRNA methylation Non-coding RNA Drug development

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