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Recent advances in enzyme-free and enzyme-mediated single-nucleotide variation assay in vitro

National Science Review 2024年第5期11卷 365-384页

作者： Erhu Xiong pengfei Liu Ruijie Deng Kaixiang Zhang Ronghua yang Jinghong Li Key Laboratory of Chemical Biology &Traditional Chinese Medicine Research Ministry of EducationCollege of Chemistry and Chemical Engineering Hunan Normal University College of Biomass Science and Engineering Healthy Food Evaluation Research CenterSichuan University School of Pharmaceutical Sciences Key Laboratory of Targeting Therapy and Diagnosis for Critical Diseases Zhengzhou University Department of Chemistry Center for Bioanalytical Chemistry Key Laboratory of Bioorganic Phosphorus Chemistry& Chemical BiologyTsinghua University Beijing Institute of Life Science and Technology

Single-nucleotide variants(SNVs) are the most common type variation of sequence alterations at a specific location in the genome, thus involving significant clinical and biological information. The assay of SNVs has engaged great awareness, because many genome-wide association studies demonstrated that SNVs are highly associated with serious human diseases. Moreover, the investigation of SNV expression levels in single cells are capable of visualizing genetic information and revealing the complexity and heterogeneity of single-nucleotide mutation-related diseases. Thus, developing SNV assay approaches in vitro, particularly in single cells, is becoming increasingly in demand. In this review, we summarized recent progress in the enzyme-free and enzyme-mediated strategies enabling SNV assay transition from sensing interface to the test tube and single cells, which will potentially delve deeper into the knowledge of SNV functions and disease associations, as well as discovering new pathways to diagnose and treat diseases based on individual genetic profiles. The leap of SNV assay achievements will motivate observation and measurement genetic variations in single cells, even within living organisms, delve into the knowledge of SNV functions and disease associations, as well as open up entirely new avenues in the diagnosis and treatment of diseases based on individual genetic profiles.

关键词： single-nucleotide variant point mutation in vitro enzyme-free assay enzyme-mediated assay

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Self-derivation and reconstruction of silver nanoparticle reinforced cobalt-nickel bimetallic hydroxides through interface engineering for overall water splitting

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Journal of Energy Chemistry 2024年第3期90卷 590-599,I0013页

作者： Yan Li Jie Han Weiwei Bao Junjun Zhang Taotao Ai Mameng yang Chunming yang pengfei Zhang National and Local Joint Engineering Laboratory for Slag Comprehensive Utilization and Environmental Technology School of Materials Science and EngineeringShaanxi University of TechnologyHanzhong 723000ShaanxiChina State Key Laboratory of High-efficiency Utilization of Coal and Green Chemical Engineering College of Chemistry&Chemical EngineeringNingxia UniversityYinchuan 750021NingxiaChina College of Chemistry&Chemical Engineering Yan’an UniversityYan’an 716000ShaanxiChina School of Chemistry and Chemical Engineering Shanghai Jiao Tong UniversityShanghai 200240China

Designing efficient and long-lasting non-metal electrocatalysts is an urgent task for addressing the issue of kinetic hysteresis in electrochemical oxidation *** bimetallic hydroxides,catalyzing the oxygen evolution reaction(OER),have significant research potential because hydroxide reconstruction to generate an active phase is a remarkable ***,the complete reconstruction of ultrathin CoNi(OH)_(2) nanosheets was achieved by embedding Ag nanoparticles into the hydroxide to induce a spontaneous redox reaction(SRR),forming heterojunction Ag@CoNi(OH)_(2) for bifunctional *** calculations and in situ Raman and ex situ characterizations revealed that the inductive effect of the Ag cation redistributed the charge to promote phase transformation to highly activate Ag-modified *** Co-Ni dual sites in Co/NiOOH serve as novel active sites for optimizing the intermediates,thereby weakening the barrier formed by OOH^*.Ag@CoNi(OH)_(2) required a potential of 1.55 V to drive water splitting at a current density of 10 mA cm^(-2),with nearly 98.6% Faraday *** ion induction and triggering of electron regulation in the OER via the synergistic action of the heterogeneous interface and surface reconstruction,this strategic design can overcome the limited capacity of bimetallic hydroxides and bridge the gap between the basic theory and industrialization of water decomposition.

关键词： Surface reconstruction Bimetallic hydroxides Ag nanoparticle Operando Raman Overall water splitting

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Semi-quantitative design of synergetic surficial/interfacial sites for the semi-continuous oxidation of glycerol

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Fundamental Research 2022年第3期2卷 412-421页

作者： Mingyu Gao pengfei yang Xinyi Zhang Yani Zhang Dianqing Li Junting Feng State Key Laboratory of Chemical Resource Engineering Beijing University of Chemical TechnologyBeijing100029China Beijing Engineering Center for Hierarchical Catalysts Beijing University of Chemical TechnologyBeijing100029China

Qualitatively identifying the dominant catalytic site for each step of a semi-continuous reaction and semi-quantitatively correlating such different sites to the catalytic performance is of great significance toward the integration of multiple well-optimized sites on a heterogeneous ***,a series of structurally defined TiO_(x)-based catalysts were synthesized to provide a feasible approach to investigate the aforementioned issues using the semi-continuous oxidation of glycerol as a model *** investigations have verified the simultaneous presence of two kinds of Pt active sites:1)Negatively charged Pt bound to the oxygen vacancies of modified TiO_(x)in the form of Pt^(δ−)-O_(v)-Ti^(3+) sites and 2)metallic Pt(Pt_(0)site)located away from the ***,the proportion of surficial and interfacial sites varies over this series of *** in situ FTIR experiments revealed that the reaction network was well-tuned via a site cooperation mechanism:The surficial Pt_(0)sites dissociatively adsorb the OH group of glycerol with a monodentate bonding geometry and the Pt^(δ−)-O_(v)-Ti^(3+) sites dissociate the C=O bond of the aldehyde group in a bidentate ***,CO-FTIR spectroscopy confirmed a correlation between the reaction rate/product selectivity and the fraction of surficial/interfacial sites.A rational proportion of surficial and interfacial sites is key to enabling a high yield of glyceric *** most active catalyst with 32%surface sites and 68%interfacial sites exhibited 90.0%glycerol conversion and 68.5%GLYA *** findings provide a deeper understanding of the structure-activity relationships using qualitative identification and semi-quantitative analysis.

关键词： Synergistic effect Surficial sites Interfacial sites Semi-continuous reactions Semi-quantitative analysis

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Salt-assisted growth and ultrafast photocarrier dynamics of large-sized monolayer ReSe2

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Nano Research 2020年第3期13卷 667-675页

作者： Shaolong Jiang Jin yang Yuping Shi Jing Zhao Chunyu Xie Liyun Zhao Jiatian Fu pengfei yang Yahuan Huan Qin Xie Huachao Jiang Qing Zhang Xianlong Wang Fuhai Su Yanfeng Zhang Department of Materials Science and Engineering College of EngineeringPeking UniversityBeijing100871China Key Laboratory of Materials Physics Institute of Solid State PhysicsChinese Academy of SciencesHefei230031China University of Science and Technology of China Hefei230026China Center for Nanochemistry(CNC) Beijing National Laboratory for Molecular SciencesCollege of Chemistry and Molecular EngineeringPeking UniversityBeijing100871China

Owing to its anisotropic optical and electrical properties,rhenium diselenide(ReSe2)has garnered considerable attention recently as a candidate material for polarization-sensitive ***,the direct and controllable synthesis of large-sized ReSe2 with a uniform thickness is still a great ***,we have refined the synthesis method to obtain uniform monolayer ReSe2 flakes with a size of up to^106μm on sapphire via an ambient-pressure chemical vapor deposition technique using Na promoter from sodium ***,optical pump-probe spectroscopy revealed a fast switching from saturable absorption(SA)to absorption enhancement(AE)in subpicosecond time scale,followed by a slower decay induced by exciton ***,both AE and SA signals exhibited clear angular dependence with a periodicity of 180°,which reflected the dichroism in nonlinear absorption *** addition,the photocarrier dynamics including free-carrier transport and subpicosecond relaxation due to exciton formation or surface trapping was probed using time resolved terahertz *** believe that our study serves as a reference for atomically controlled synthesis of large-sized ReSe2 and provides useful insights on its optoelectronic properties for novel device applications.

关键词： ReSe2 chemical vapor deposition sodium chloride large size ultrafast photocarrier dynamics

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Controlled Syntheses and Multifunctional Applications of Two-Dimensional Metallic Transition Metal Dichalcogenides

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Accounts of Materials Research 2021年第9期2卷 751-763页

作者： Peng Wang Yahuan Huan pengfei yang Mo Cheng Jianping Shi Yanfeng Zhang The Institute for Advanced Studies Wuhan UniversityWuhan 430072China School of Materials Science and Engineering Peking UniversityBeijing 100871China

CONSPECTUS:Among two-dimensional(2D)layered materials,metallic transition metal dichalcogenides(MTMDCs)are emerging as promising candidates in many application aspects(e.g.,electronics,spintronics,and energy related fields,etc.)in view of their ultrahigh electronic conductivities,newfangled room-temperature ferromagnetism(e.g.,VSe_(2),VTe_(2)),and excellent catalytic ***,2D TaX_(2) and VX_(2)(X=S,Se,Te)materials stand in a vital place on account of their exotic physical and chemical ***,the controlled synthesis of such materials is the premise for exploring the aforementioned properties and *** the reported preparation methods,chemical vapor deposition(CVD)is proven to be a promising approach in view of its scalability,simple operation,low cost,*** method has been employed to synthesize various 2D layered materials and heterostructures in a well-controlled ***,in view of the complicated growth mechanism and process,the CVD growth of ultrathin TaX_(2) and VX_(2) nanosheets/films remains extremely *** addition,the application explorations of 2D TaX_(2) and VX_(2) in the energy related fields and electronic devices are still in the primary *** this Account,we review the up-to-date advances regarding the CVD syntheses of 2D TaX_(2) and VX_(2)(e.g.,TaS_(2),TaSe_(2),VS_(2),VSe_(2),and VTe_(2),etc.)and air-stable MTMDCs(e.g.,PtSe2,NiTe2),as well as their multifunctional applications in the energy related fields and electronic ***,the CVD growth of TaX_(2) and VX_(2) nanosheets/films with tunable thicknesses/domain sizes and the MTMDCs/semiconducting TMDCs vertical heterostructures are systematically ***,the application explorations of CVD-synthesized 2D TaX_(2) and VX_(2) as high-performance electrode materials in electrocatalytic hydrogen evolution reaction(HER)and electronic devices are introduced,***,the CVD syntheses of 2D MTMDCs with robust envir

关键词： properties Transition mentioned

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Research on the mechanism of rockburst induced by mined coal-rock linkage of sharply inclined coal seams

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International Journal of Minerals,Metallurgy and Materials 2024年第5期31卷 929-942页

作者： Xingping Lai Huicong Xu pengfei Shan Qinxin Hu Weixi Ding Shangtong yang Zhongming Yan College of Energy Science and Engineering Xi’an University of Science and TechnologyXi’an 710054China State Key Laboratory of Green Low Carbon Development of Oil-rich Coal in Western China Xi’an 710054China College of Future Technology Xi’an University of Science and TechnologyXi’an 710054China Department of Civil and Environmental Engineering University of StrathclydeGlasgowG11XJUK

In recent years,the mining depth of steeply inclined coal seams in the Urumqi mining area has gradually *** deformation of mining coal-rock results in frequent *** has become a critical issue that affects the safe mining of deep,steeply inclined coal *** this work,we adopt a perspective centered on localized deformation in coal-rock mining and systematically combine theoretical analyses and extensive data mining of voluminous microseismic *** describe a mechanical model for the urgently inclined mining of both the sandwiched rock pillar and the roof,explaining the mechanical response behavior of key disaster-prone zones within the deep working face,affected by the dynamics of deep *** exploring the spatial correlation inherent in extensive microseismic data,we delineate the“time-space”response relationship that governs the dynamic failure of coal-rock during the progression of the sharply inclined working *** results disclose that(1)the distinctive coal-rock occurrence structure characterized by a“sandwiched rock pillar-B6 roof”constitutes the origin of rockburst in the southern mining area of the Wudong Coal Mine,with both elements presenting different degrees of deformation localization with increasing mining depth.(2)As mining depth increases,the bending deformation and energy accumulation within the rock pillar and roof show nonlinear *** localized deformation of deep,steeply inclined coal-rock engenders the spatial superposition of squeezing and prying effects in both the strike and dip directions,increasing the energy distribution disparity and stress asymmetry of the“sandwiched rock pillar-B3+6 coal seam-B6 roof”*** makes worse the propensity for frequent dynamic disasters in the working face.(3)The developed high-energy distortion zone“inner-outer”control technology effectively reduces high stress concentration and energy distortion in the surrounding *** implementation,the averag

关键词： steeply inclined coal seam localized deformation mechanism of induced rockburst prevention and control of rockburst

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Experimental study on the effect of water absorption level on rockburst occurrence of sandstone

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Journal of Rock Mechanics and Geotechnical Engineering 2024年第1期16卷 136-152页

作者： Dongqiao Liu Jie Sun pengfei He Manchao He Binghao Cao Yuanyuan yang State Key Laboratory for Geomechanics and Deep Underground Engineering China University of Mining and Technology(Beijing)Beijing100083China School of Mechanics and Civil Engineering China University of Mining and Technology(Beijing)Beijing100083China Institute for Deep Underground Science and Engineering China University of Mining and Technology(Beijing)Beijing100083China

To investigate the mechanism of rockburst prevention by spraying water onto the surrounding rocks,15 experiments are performed considering different water absorption levels on a single ***-speed photography and acoustic emission(AE)system are used to monitor the rockburst *** effect of water on sandstone rockburst and the prevention mechanism of water on sandstone rockburst are analyzed from the perspective of energy and failure *** results show that the higher the ab-sorption degree,the lower the intensity of the rockburst after absorbing water on single side of *** is reflected in the fact that with the increase in the water absorption level,the ejection velocity of rockburst fragments is smaller,the depth of the rockburst pit is shallower,and the AE energy is *** the water absorption level of 100%,the magnitude of rockburst intensity changes from medium to *** prevention mechanism of water on sandstone rockburst is that water reduces the capacity of sandstone to store strain energy and accelerates the expansion of shear cracks,which is not conducive to the occurrence of plate cracking before rockburst,and destroys the conditions for rockburst incubation.

关键词： Rockburst Water Prevention effect Crack evolution

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植入物射频热效应评估的测试环境构建研究

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中国医疗器械杂志 2024年第3期48卷 281-284,297页

作者：李永华陆凌峰王晶李铖铃杨鹏飞汪志超吴大晶刘勋胡晟上海市医疗器械检验研究院上海市201318 国家药品监督管理局医用电气设备重点实验室上海市201318 国家药品监督管理局医疗器械技术审评中心北京市100081

在磁共振检查中,植入物与射频场相互作用会引起周围人体组织发热,甚至造成组织损伤。评估植入物射频热效应需要进行植入物电磁建模、电磁模型验证和虚拟人体仿真。其中,构建用于电磁模型验证的测试环境是射频热效应评估的重要环节。研... 详细信息

在磁共振检查中,植入物与射频场相互作用会引起周围人体组织发热,甚至造成组织损伤。评估植入物射频热效应需要进行植入物电磁建模、电磁模型验证和虚拟人体仿真。其中,构建用于电磁模型验证的测试环境是射频热效应评估的重要环节。研究建立了包括射频发生系统、电磁场量测系统和机械臂定位系统的硬件环境,使用基于Python的软件开发平台实现了自动化控制软件环境,形成了高精度、自动化的集成测试环境。研究结果表明,该测试环境形成的电场与计算机仿真得到的电场具有较好的一致性,可以用于植入物射频热效应评估。

关键词：植入物磁共振成像射频热效应 Python

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A Unifi ed View of Carbon Neutrality:Solar-Driven Selective Upcycling of Waste Plastics

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Transactions of Tianjin University 2024年第1期30卷 1-26页

作者： Zhiyong Zhao Shuai Yue Gaohua yang pengfei Wang Sihui Zhan MOE Key Laboratory of Pollution Processes and Environmental Criteria Tianjin Key Laboratory of Environmental Remediation and Pollution ControlCollege of Environmental Science and EngineeringTianjin 300350China

With the rapid development of plastic production and consumption globally,the amount of post-consumer plastic waste has reached levels that have posed environmental *** the substantial CO_(2)emissions throughout the plastic lifecycle from material production to its disposal,photocatalysis is considered a promising strategy for eff ective plastic recycling and *** can upgrade plastics into value-added products under mild conditions using solar energy,realizing zero carbon *** this paper,we explain the basics of photocatalytic plastic reformation and underscores plastic feedstock reformation pathways into high-value-added products,including both degradation into CO_(2)followed by reformation and direct reformation into high-value-added ***,the current applications of transforming plastic waste into fuels,chemicals,and carbon materials and the outlook on upcycling plastic waste by photocatalysis are presented,facilitating the realization of carbon neutrality and zero plastic waste.

关键词： Photocatalysis Photoreforming Plastics upcycling Carbon neutrality Energy storage and conversion

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电感耦合等离子体质谱法测定氢氧化镧中铝、锰、锌量

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金属功能材料 2024年第1期31卷 121-125页

作者：张红刘玉宝杨鹏飞高日增高立红白云鄂博稀土资源研究与综合利用国家重点实验室内蒙古包头014030 包头稀土研究院内蒙古包头014030 瑞科稀土冶金及功能材料国家工程研究中心内蒙古包头014030

准确测定氢氧化镧中铝、锰、锌的含量,对其生产和应用研究具有重要意义。采用硝酸溶解样品,选择^(27)Al、^(55)Mn、^(64)Zn为测定同位素,在1%(体积分数)硝酸介质中,用铑内标校正基体效应,建立了电感耦合等离子体质谱法(ICP-MS)测定氢氧... 详细信息

准确测定氢氧化镧中铝、锰、锌的含量,对其生产和应用研究具有重要意义。采用硝酸溶解样品,选择^(27)Al、^(55)Mn、^(64)Zn为测定同位素,在1%(体积分数)硝酸介质中,用铑内标校正基体效应,建立了电感耦合等离子体质谱法(ICP-MS)测定氢氧化镧中铝、锰、锌含量的方法。考察了基体浓度和内标元素对测定的影响。结果表明,在试验的基体质量浓度范围内,基体效应不显著,铑内标较铯、铟内标对被测元素的测定校正效果更好。试验选择10.00 ng/mL铑为内标,控制基体镧质量浓度为0.37 mg/mL。试验表明,各元素校准曲线的相关系数在0.999 5以上,检出限为0.069×10^(-6)~0.24×10^(-6),定量限为0.23×10^(-6)~0.78×10^(-6)。按试验方法测定氢氧化镧中铝、锰、锌含量,相对标准偏差(RSD,n=11)为1.60%~5.31%,加标回收率为94%~108%,可应用于氢氧化镧的生产和应用研究中。

关键词：电感耦合等离子体质谱氢氧化镧铝锰锌

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