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A novel Ce_(0.485)Zr_(0.485)Y_(0.03)O_(2) composite oxide with surface doping of Y and its application in Pd-only three-way catalyst

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Rare Metals 2024年第2期43卷 749-757页

作者： Zheng Zhao Wei-Xin Zhao Yong-Qi Zhang Mei-Sheng Cui Yong-Ke Hou Dong-Ming Chen Juan-Yu Yang Zong-Yu Feng Xiao-Wei Huang National Engineering Research Center for Rare Earth Grirem Advanced Materials Co.Ltd.GRINM Group Corporation LimitedBeijing100088China Griem Hi-Tech co.ltd. Langfang065000China Rare Earth Functional Materials(Xiong’an)Innovation Venter co.ltd. Baoding071700China

The ceria-zirconia compound oxide-supported noble metal Pd(Pd@CZ)is widely used in three-way ***,the surface structure of CZ plays an important role in catalytic activity of ***,how to regulate the surface structure of CZ and clarify the structure–activity relationship is still a *** this paper,a strategy is proposed to develop high activity Pd@CZ nanocatalysts by tuning Y doping sites in *** precipitate-deposition method is developed to prepare the novel Ce_(0.485)Zr_(0.485)Y_(0.03)O_(2) composite with surface doping of Y(CZ-Y-S).In addition,the Pd@CZ-Y-S(Pd supported on CZ-Y-S)exhibits superior catalytic activity for HC,co,and NO oxide,wherein,for co and C_(3)H_(6) oxidation,the low-temperature activity of Pd@CZ-Y-S is still 20%higher than that of Pd@CZ-Y-B(Y bulk doping)and commercial Pd@CZ after 1000℃/4 h *** effect mechanism is further studied by density functional theory(DFT)*** with Pd@CZ-Y-B,Pd@CZ-Y-S shows the lower co oxide reaction energy barriers due to the weaker adsorption strength of *** Y surface doping strategy could provide valuable insights for the development of highly efficient Pd@CZ catalyst with extensive applications.

关键词： Rare earth Ceria-zirconia-supported Pd Surface doping Experiment and theory Catalytic application

Occurrence and vertical distribution of aluminum and rare earths in weathered crust elution-deposited rare earth ore:Effect of soil solution pH and clay minerals

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Journal of Rare Earths 2024年第7期42卷 1394-1402,I0007页

作者： Jiaxin Pan Longsheng Zhao Zheng Li Xiaowei Huang Zongyu Feng Jun Chen National Engineering Research Center for Rare Earth China GRINM Group Co.Ltd.Beijing100088China School of Metallurgical and Ecological Engineering University of Science and Technology Beijing(USTB)Beijing100083China GRIREM Hi–Tech co. Ltd.Langfang065201China GRIREM Advanced Materials co. Ltd.Beijing100088China GRIMAT Engineering Institute co. Ltd.Beijing101407China

Weathered crust elution-deposited rare earth ore is crucial source of medium and heavy rare earths,with in-situ leaching being the most common mining *** high contents of impurity of aluminum in the leach solution are a significant challenge for the subsequent enrichment process of rare earths.A comprehensive understanding of the occurrences and vertical distribution of aluminum and rare earths within typical vertical profiles can provide valuable insights into entire design of the in-situ *** paper improves a five-step sequential extraction method to analyze the occurrence and vertical distribution of rare earths and aluminum in vertical profiles from Chongzuo and *** results demonstrate that soil solution pH is the main factor affecting the vertical distribution of ionexchangeable rare *** samples have distinct areas of enrichment for ion-exchangeable rare earths or ***-exchangeable rare earths are primary concentrated in the middle and lower parts of the ore layer(4-13 m in Chongzuo,14-22 m in Longyan),while the ion-exchangeable aluminum is mainly enriched in the upper part of the ore layer(1-5 m in Chongzuo,and 2-14 m in Longyan).The vertical distribution of inorganic hydroxy aluminum is likely influenced by the micromorphology and particle size of the clay *** inorganic hydroxy aluminum concentration in Chongzuo samples decreases continuously from 415.65 to 120.95 mg/kg with increasing sampling depth,whereas the concentration in Longyan samples(110.55-171.27 mg/kg)is almost independence with sampling *** results provide direct guidance for the entire design of the injection well depth and the leaching parameters,thereby inhibiting the leaching of impurity of aluminum and lower the consumption of leaching agent.

关键词： Weathered crust elution-deposited rare earth ore Sequential extraction Occurrence Aluminum Rare earth elements

Lake microbiome composition determines community adaptability to warming perturbations

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Ecological Processes 2024年第2期13卷 177-191页

作者： Xiaotong Wu Qixing Zhou Hui Zeng Xiangang Hu Key Laboratory of Pollution Processes and Environmental Criteria (Ministry of Education) Carbon Neutrality Interdisciplinary Science Centre/College of Environmental Science and Engineering Nankai University

Background Microbial communities are crucial for ecosystems. A central goal of microbial ecological research is to simplify the biodiversity in natural environments and quantify the functional roles to explore how the ecosystems respond under different environmental conditions. However, the research on the stability and dynamics of lake microbes in response to repeated warming stress is *** To exclude confounding environmental factors, we conducted a 20-day repeated warming simulation experiment to examine the composition and function dynamics of lake microbial *** Experimental warming significantly altered the community structure of bacteria instead of fungi. Microbial community structure, together with microbial biomass, jointly regulated the function of microbial communities. The plummeting of aerobic denitrifiers Pseudomonadaceae decreased by 99%(P conditions, the microbial community with higher adaptability showed more positive correlations and less competitive relationships in co-occurrence networks to acclimate to *** Microbiome composition controlled carbon and nitrogen metabolism, thus determining lake microbial communities' adaptability to heat stress. This study extended our insights on the lake microbial community response and adaptability under warming drivers.

关键词： Temperature Environmental stress Bacteria Fungi Freshwater ecosystem

Enhanced energy density and fast-charging ability via directional particle configuration

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Journal of Energy Chemistry 2024年第3期90卷 152-164,I0005页

作者： Xiongwei Wu Shanguang lv Jiabao Li Xingrong Yin Xuewen Wu Jun Liu Jie Zhang Yuhan Yu Bei Long Hunan Yinfeng New Energy co.ltd. Changsha 410019HunanChina

The limited energy density of lithium-ion capacitors poses a significant obstacle to their widespread application,primarily stemming from the inability of the electrodes to simultaneously fulfill both high energy density and rapid charging *** data demonstrate that a directional particle configuration can enhance charging speed while maintaining high-capacity density,but it is rarely ***,we have developed a particle-level electrochemical model capable of reconstructing an electrode with a directional particle *** employing this method,an investigation was conducted to explore how the spatial morphology characteristics of particle configuration impact the energy storage characteristics of *** demonstrate that rational particle configuration can effectively enhance the transport of lithium ions and create additional space for lithium-ion *** the same particle size distribution,the best electrode can increase the discharge capacity by up to132.4% and increase the charging SOC by 11.3% compared to the ordinary electrode under the condition of 6 *** findings provide a further understanding of the energy storage mechanism inside the anisotropic particle distribution electrode,which is important for developing high-performance lithium-ion capacitors.

关键词： Supercapacitor Gradient design strategies Energy storage Charge transport

A Two-color Single-molecule Sequencing Platform and Its Clinical Applications

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Genomics, Proteomics & Bioinformatics 2024年第1期22卷 169-175页

作者： Fang Chen Bin Liu Meirong Chen Zefei Jiang Zhiliang Zhou Ping Wu Meng Zhang Huan Jin Linsen Li Liuyan Lu Huan Shang Lei Liu Weiyue Chen Jianfeng Xu Ruitao Sun Guangming Wang Jiao Zheng Jifang Qi Bo Yang Lidong Zeng Yan Li Hui Lv Nannan Zhao Wen Wang Jinsen Cai Yongfeng Liu Weiwei Luo Juan Zhang Yanhua Zhang Jicai Fan Haitao Dan Xuesen He Wei Huang Lei Sun Qin Yan GeneMind Biosciences co. Ltd.Shenzhen 518000China

DNA sequencers have become increasingly important research and diagnostic tools over the past 20 *** this study,we developed a single-molecule desktop sequencer,GenoCare 1600(GenoCare),which utilizes amplification-free library preparation and two-color sequencing-by-synthesis chemistry,making it more user-friendly compared with previous single-molecule sequencing platforms for clinical *** the GenoCare platform,we sequenced an Escherichia coli standard sample and achieved a consensus accuracy exceeding 99.99%.We also evaluated the sequencing performance of this platform in microbial mixtures and coronavirus disease 2019(coVID-19)samples from throat *** findings indicate that the GenoCare platform allows for microbial quantitation,sensitive identification of the severe acute respiratory syndrome coronavirus 2(SARS-coV-2)virus,and accurate detection of virus mutations,as confirmed by Sanger sequencing,demonstrating its remarkable potential in clinical application.

关键词： GenoCare Single-molecule sequencing SARS-coV-2 Microbial quantitation Variant detection

F?rster resonance energy transfer reveals phillygenin and swertiamarin concurrently target AKT on different binding domains to increase the anti-inflammatory effect

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Chinese Chemical Letters 2024年第5期 233-238页

作者： Xiaoyao Ma Jinling Zhang Ge Fang He Gao Jie Gao Li Fu Yuanyuan Hou Gang Bai State Key Laboratory of Medicinal Chemical Biology College of Pharmacy and Tianjin Key Laboratory of Molecular Drug Research Nankai University college of Life Health Dalian University Dalian Fusheng Pharmaceutical co. Ltd.

The clinical benefit of combination therapy is significant, but it is not easy to define the mechanism of complexity and diversity. Previous studies illustrate that phillygenin(Phi) binds in the allosteric inhibit pocket of protein kinase B(AKT), and swertiamarin(Swe) acts on the pleckstrin homology(PH) domain of AKT. However, the combined synergistic effect of relieving the inflammatory response has yet to be elucidated. Based on high sensitivity, specificity and fast-responsibility fluorescent sensors, the F?rster resonance energy transfer(FRET) technique offers a route to provide clear insights into physiological and pathological processes. In the study, molecular docking, the fluorescent probes of Phi and Swe for FRET were designed and synthesized. FRET analysis shown that Swe and Phi concurrently acted on the PH domain and allosterically inhibited pocket of AKT, respectively. The combination of Swe and Phi significantly increased the heat stability of AKT and decreased protease-induced degeneration. In lipopolysaccharides(LPS)-induced mice and cells, the combination arrested AKT activation, nuclear factor kappa-B(NF-κB)phosphorylation, and the expression of tumor necrosis factor-α(TNF-α), interleukin(IL)-6 and IL-8. In conclusion, FRET revealed Phi and Swe concurrently targeted AKT on different domains and the combination of Phi and Swe enhanced the anti-inflammatory effect.

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Cyber-Physical Resilience Enhancement for Power Transmission Systems with Energy Storage Systems

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CSEE Journal of Power and Energy Systems 2024年第2期10卷 844-855页

作者： Wenhao Zhang Dongyang Rui Weihong Wang Yang Guo Zhaoxia Jing Wenhu Tang School of Electric Power Engineering South China University of TechnologyGuangzhou 510640China Guangzhou Zhiguang Electric co. Ltd and Zhiguang Research Institute(Guangzhou)Co.LtdGuangzhou 510765China

In a power system, when extreme events occur, such as ice storm, large scale blackouts may be unavoidable. Such small probability but high risk events have huge impact on power systems. Most resilience research in power systems only considers faults on the physical side, which would lead to overly idealistic results. This paper proposes a two-stage cyber-physical resilience enhancement method considering energy storage (ES) systems. The first stage calculates optimal planning of ES systems, and the second stage assesses resilience and enhancement of ES systems during the disaster. In the proposed model, cyber faults indirectly damage the system by disabling monitoring and control function of control center. As a result, when detection and response process of physical faults are blocked by cyber failures, serious load shedding occurs. Such a cyber-physical coupling mechanism of fault, response, restoration process is demonstrated in the modified IEEE Reliable Test System-79 (RTS-79). Simulation results show compared with the physical-only system, the cyber-physical system has a more accurate but degraded resilient performance. Besides, ES systems setting at proper place effectively enhance resilience of the cyber-physical transmission system with less load Shedding.

关键词： Cyber-physical faults energy storage systems resilience enhancement transmission systems

Large-Scale CRISPR Screen of LDLR Pathogenic Variants

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Research 2024年第2期2023卷 213-225页

作者： Mengjing Li Lerong Ma Yiwu Chen Jianing Li Yanbing Wang Wenni You Hongming Yuan Xiaochun Tang Hongsheng Ouyang Daxin Pang Key Lab for Zoonoses Research Ministry of EducationAnimal Genome Editing Technology Innovation CenterCollege of Animal SciencesJilin UniversityChangchunJilin Province 130062China The Institute of Translational Medicine Tianjin Union Medical Center of Nankai UniversityTianjin 300071China Chongqing ResearchInstitute Jilin UniversityChongqing 401123China Chongqing Jitang Biotechnology Research Institute co.ltd. ChongqingChina

Familial hypercholesterolemia(FH)is a frequently occurring genetic disorder that is linked to early-onset cardiovascular *** left untreated,patients with this condition can develop severe cardiovascular ***,many patients remain undiagnosed,and even when diagnosed,the treatment is often not *** mutations in the LDLR gene are the primary cause of FH,predicting whether novel variants are pathogenic is not a straightforward *** the functionality of LDLR variants is crucial in uncovering the genetic basis of *** study utilized CRISPR/Cas9 cytosine base editors in pooled screens to establish a novel approach for functionally assessing tens of thousands of LDLR variants on a large scale.A total of more than 100 single guide RNAs(sgRNAs)targeting LDLR pathogenic mutations were successfully screened with relatively high *** of these,5 sgRNAs were further subjected to functional verification studies,including 1 in the promoter,1 in the antisense RNA,1 in the exon,and 2 in the *** for the variant caused by the sgRNA located at intron 16,the functionalities of the other LDLR variants were all *** high similarity of LDLR intron sequences may lead to some false ***,these results confirm the reliability of the large-scale screening strategy for functional analysis of LDLR variants,and the screened candidate pathogenic mutations could be used as an auxiliary means of clinical gene detection to prevent FH-induced heart disease.

关键词： LDLR Screen straight

co-electrolysis of ethylene glycol and carbon dioxide for formate synthesis

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Science China Chemistry 2024年第5期67卷 1539-1544页

作者： Dongfeng Du Fusong Kang Shiru Yang Bin Shao Jingshan Luo Institute of Photoelectronic Thin Film Devices and Technology State Key Laboratory of Photovoltaic Materials and CellsKey Laboratory of Photoelectronic Thin Film Devices and Technology of TianjinMinistry of Education Engineering Research Center of Thin Film Photoelectronic TechnologyNankai UniversityTianjin 300350China Haihe Laboratory of Sustainable Chemical Transformations Tianjin 300192China Frontiers Science Center for New Organic Matter Nankai UniversityTianjin 300071China college of Electronic Information and Optical Engineering Tianjin Key Laboratory of Optoelectronic Sensor and Sensing Network TechnologyNankai UniversityTianjin 300350China

co-electrolysis of waste plastics and carbon dioxide(co_(2)) into value-added chemicals or fuels is a promising pathway for a sustainable society, but efficient and selective conversion remains a challenge. Herein, a gold-mediated nickel hydroxide(Au/Ni(OH)_(2)) is developed to oxidize waste plastic-derived ethylene glycol(EG) into formate. In-situ electrochemical experiments and theoretical results reveal that the introduction of Au favors the redox properties and EG adsorption behavior of Ni(OH)_(2). The Au/Ni(OH)_(2) catalyst shows an excellent formate selectivity of >90% at high current densities of above 100 m A cm^(-2). When coupled with sputtered bismuth(Bi) cathode for co_(2) reduction, a high formate Faradic efficiency(FE) of 188.2% at 200 m A cm^(-2)and a good formate productivity of 7.33 mmol m^(-2)s^(-1)at 10 A are obtained in a flow cell and a zero-gap membrane electrode assembly(MEA) cell, respectively. This work demonstrates a promising strategy to convert waste plastics and co_(2) into valuable products.

关键词： waste plastic upcycling ethylene glycol oxidation carbon dioxide reduction electrocatalysis formate synthesis