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Confined Mn^(2+) enables effective aerobic oxidation catalysis

Science China Chemistry 2024年第5期67卷 1545-1553页

作者： desheng yuan Sicong Ma Xiao Kong Chi Zhang Lin Chen Chengsheng Yang Lihua Wang Zhen Liu Lin Ye Yongmei Liu Rui Ma Zhi-Pan Liu Yifeng Zhu Yong Cao Xinhe Bao Department of Chemical Physics University of Science and Technology of ChinaHefei 230026China Department of Chemistry Shanghai Key Laboratory of Molecular Catalysis and Innovative MaterialsCollaborative Innovation Center of Chemistry for Energy MaterialsFudan UniversityShanghai 200438China Key Laboratory of Synthetic and Self-Assembly Chemistry for Organic Functional Molecules Shanghai Institute of Organic ChemistryChinese Academy of SciencesShanghai 200032China School of Materials and Chemistry University of Shanghai for Science and TechnologyShanghai 200093China Shanghai Synchrotron Radiation Facility Shanghai Advanced Research InstituteChinese Academy of SciencesShanghai 201204China Institute of Advanced Fluorine-Containing Materials Zhejiang Normal UniversityJinhua 321004China State Key Laboratory of Catalysis National Laboratory for Clean EnergyCollaborative Innovation Center of Chemistry for Energy MaterialsDalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023China

Effective and mild activation of O_(2) is essential but challenging for aerobic oxidation. In heterogeneous catalysis, high-valence manganese oxide(e.g., +4) is known to be active for the oxidation, whereas divalent MnO is ineffective due to its limited capacity to supply surface oxygen and its thermodynamically unstable structure when binding O_(2) in reaction conditions. Inspired by natural enzymes that rely on divalent Mn^(2+), we discovered that confining Mn^(2+) onto the Mn_(2)O_(3) surface through a dedicated calcination process creates highly active catalysts for the aerobic oxidation of 5-hydroxymethylfurfural, benzyl alcohol, and *** Mn_(2)O_(3)-confined Mn^(2+) is undercoordinated and efficiently mediates O_(2) activation, resulting in 2–3 orders of magnitude higher activity than Mn_(2)O_(3) alone. Through low-temperature infrared spectroscopy, we distinguished low-content Mn^(2+) sites at Mn_(2)O_(3) surface, which are difficult to be differentiated by X-ray photoelectron spectroscopy. The combination of in-situ energydispersive X-ray absorption spectroscopy and X-ray diffraction further provides insights into the formation of the newly identified active Mn^(2+) sites. By optimizing the calcination step, we were able to increase the catalytic activity threefold *** finding offers promising frontiers for exploring active oxidation catalysts by utilizing the confinement of Mn^(2+)and oftenignored calcination skills.

关键词： confinement catalysis manganese oxide aerobic oxidation divalent Mn^(2+) operando spectroscopies

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五灵胶囊治疗酒精性肝病的效果

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西北药学杂志 2024年第5期39卷 26-32页

作者：袁德胜张振江梁恩富段煜李凯袁玲大连公共卫生临床中心中西医结合肝病科大连116012 江苏省人民医院宿迁医院感染病科宿迁223800 大连公共卫生临床中心肝病科大连116012

目的探讨五灵胶囊治疗酒精性肝病的效果。方法以2022年1月-2024年1月收治的酒精性肝病患者240例作为研究对象。根据治疗方案不同分为2组,对照组使用护肝片常规治疗,研究组使用五灵胶囊治疗。比较2组患者的临床治疗总有效率、肝功能、F... 详细信息

目的探讨五灵胶囊治疗酒精性肝病的效果。方法以2022年1月-2024年1月收治的酒精性肝病患者240例作为研究对象。根据治疗方案不同分为2组,对照组使用护肝片常规治疗,研究组使用五灵胶囊治疗。比较2组患者的临床治疗总有效率、肝功能、FibroScan肝硬度值、肝纤维化指标[Ⅲ型前胶原(procollagen Ⅲ,PCⅢ)、Ⅳ型胶原(collage type Ⅳ,C-Ⅳ)、层黏连蛋白(laminin,LN)和透明质酸(hyaluranic acid,HA)]及不良反应发生率。结果研究组的临床治疗总有效率高于对照组(95.00%vs. 81.86%,P0.05)。结论五灵胶囊治疗酒精性肝病,临床疗效理想且安全性高,能够改善患者的肝功能和肝纤维化。

关键词：五灵胶囊酒精性肝炎肝纤维化指标 FibroScan肝硬度值

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Clinical characteristics and treatment for patients with occult chronic hepatitis B

Clinical characteristics and treatment for patients with occ...

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中华医学会第十六次全国病毒性肝炎及肝病学术会议

作者： Qingwei Gao desheng yuan Dalian sixth people’s hospital

Objective To observe the clinical manifestations and assess direct antiviral effect for patients with occult hepatitis B in *** To study 15 patients with occult hepatitis B and record their past history,family history,first-diagnosis time,confirmed-diagnosis time,laboratory report,anti-viral therapy and outcomes. Results The average age of the patients is 38.67-year old(6 males and 9 females),2 with acute hepatitis B

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The experimental study of configurating an immunoabsorption column for hepatitis B virus

The experimental study of configurating an immunoabsorption ...

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中华医学会第十六次全国病毒性肝炎及肝病学术会议

作者： Qingwei Gao Hanfa Zou Liang Kong desheng yuan Dallian Dalian No.6 People’s Hospital 116001

Objective To configure an immunoabsorption column for hepatitis B *** Being activated by epichlorohydrin,the human antibody HBs-IgG was bonded to the carrier of agarose *** configuration process was as follows:the synthesis of epoxide matrix,the synthesis and activation of amino matrix,the synthesis of aldehydic matrix,the synthesis of immunoabsorption matrix,the end capping and reduction of unbonded aldehydic,the blocking of unbonded mass and the filling of the *** The bonded rate of activa-

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The origin and evolution of Earth's nitrogen

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National Science Review 2024年第6期11卷 56-75页

作者： yuan Li State Key Laboratory of Isotope Geochemistry Guangzhou Institute of GeochemistryChinese Academy of Sciences Bayerisches Geoinstitut Universit?t Bayreuth

Nitrogen is a vital element for life on Earth. Its cycling between the surface(atmosphere + crust) and the mantle has a profound influence on the atmosphere and climate. However, our understanding of the origin and evolution of Earth's nitrogen is still incomplete. This review presents an overview of the current understanding of Earth's nitrogen budget and the isotope composition of different reservoirs, laboratory constraints on deep nitrogen geochemistry, and our understanding of the origin of Earth's nitrogen and the deep nitrogen cycle through plate subduction and volcanism. The Earth may have acquired its nitrogen heterogeneously during the main accretion phase, initially from reduced, enstatite-chondrite-like impactors,and subsequently from increasingly oxidized impactors and minimal CI-chondrite-like materials. Like Earth's surface, the mantle and core are also significant nitrogen reservoirs. The nitrogen abundance and isotope composition of these three reservoirs may have been fundamentally established during the main accretion phase and have been insignificantly modified afterwards by the deep nitrogen cycle, although there is a net nitrogen ingassing into Earth's mantle in modern subduction zones. However, it is estimated that the early atmosphere of Earth may have contained ～1.4 times the present-day atmospheric nitrogen(PAN),with ～0.4 PAN being sequestered into the crust via biotic nitrogen fixation. In order to gain a better understanding of the origin and evolution of Earth's nitrogen, directions for future research are suggested.

关键词： nitrogen isotopes silicate Earth atmosphere magma ocean

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Robustness of the octupole collectivity in 144Ba within the cranking covariant density functional theory in 3D lattice

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Nuclear Science and Techniques 2024年第8期35卷 124-131页

作者： Ze‑Kai Li yuan‑yuan Wang Mathematics and Physics Department North China Electric Power UniversityBeijing 102206China Hebei Key Laboratory of Physics and Energy Technology North China Electric Power UniversityBaoding 071000China

The octupole deformation and collectivity in octupole double-magic nucleus 144Ba are investigated using the Cranking covariant density functional theory in a three-dimensional lattice *** reduced B(E3)transition probability is implemented for the first time in semiclassical approximation based on the microscopically calculated electric octupole *** available data,including the I-ωrelation and electric transitional probabilities B(E2)and B(E3)are well ***,it is shown that the ground state of 144Ba exhibits axial octupole and quadrupole deformations that persist up to high spins(I≈24h).

关键词： Octupole collectivity Cranking covariant density functional theory Rotational spectrum Electric transitional probabilities

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基于MLX90360的电子油门位置反馈设计

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山西电子技术 2018年第3期 44-46,69页

作者：袁德胜山西省电子工业科学研究所山西太原030006

近些年,随着人们对汽车性能要求的不断提高,汽车传感器的发展呈现了突飞猛进的态势,而位置传感器的设计是汽车设计中重要的一环。MLX90360是一款由迈来芯公司开发的三轴可编程位置感应芯片,利用该芯片可研制出新型非接触式位置传感器方... 详细信息

近些年,随着人们对汽车性能要求的不断提高,汽车传感器的发展呈现了突飞猛进的态势,而位置传感器的设计是汽车设计中重要的一环。MLX90360是一款由迈来芯公司开发的三轴可编程位置感应芯片,利用该芯片可研制出新型非接触式位置传感器方案。由于其灵敏度高、使用便捷的特点,目前在汽车电子工业中被广泛应用。本文将结合MLX90360的电子油门位置反馈设计,对MLX90360的使用方法和PTC-04编程器的使用进行介绍。

关键词：电子油门位置检测 MLX90360 PTC-04

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Collective Molecular Machines: Multidimensionality and Reconfigurability

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Nano-Micro Letters 2024年第8期16卷 309-340页

作者： Bin Wang yuan Lu Department of Chemical Engineering Tsinghua UniversityBeijing 100084People’s Republic of China Key Laboratory of Industrial Biocatalysis Ministry of EducationTsinghua UniversityBeijing 100084People’s Republic of China

Molecular machines are key to cellular activity where they are involved in converting chemical and light energy into efficient mechanical *** the last 60 years,designing molecular structures capable of generating unidirectional mechanical motion at the nanoscale has been the topic of intense *** progress has been made,attributed to advances in various fields such as supramolecular chemistry,biology and nanotechnology,and ***,individual molecular machines are only capable of producing nanometer work and generally have only a single *** order to address these problems,collective behaviors realized by integrating several or more of these individual mechanical units in space and time have become a new *** this review,we comprehensively discuss recent developments in the collective behaviors of molecular *** particular,collective behavior is divided into two *** is the appropriate integration of molecular machines to efficiently amplify molecular motions and deformations to construct novel functional *** other is the construction of swarming modes at the supramolecular level to perform nanoscale or microscale *** discuss design strategies for both modes and focus on the modulation of features and ***,in order to address existing challenges,the idea of transferring experience gained in the field of micro/nano robotics is presented,offering prospects for future developments in the collective behavior of molecular machines.

关键词： Molecular machines Collective control Collective behaviors DNA Biomolecular motors

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Global adaptive output-feedback tracking with prescribed performance for uncertain nonlinear systems

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Science China(Information Sciences) 2024年第5期67卷 150-164页

作者： yuan WANG Yungang LIU School of Control Science and Engineering Shandong University

At present, one typical control strategy for guaranteeing transient and steady-state performance is funnel control and prescribed performance control. The strategy features completely discarding the system nonlinearities, even if they are completely known and available. Such an intrinsic feature requires the controller to produce a larger control effect to eliminate the negative impact caused by the high nonlinearities, leading to a conservative controller. In this paper, we fully take advantage of known information on nonlinearities in control design, instead of completely discarding it as done in funnel control. Particularly, we leverage adaptive techniques(i.e., high-gain dynamic compensation) to deal with unknown system nonlinearities. Meanwhile, we integrate the tools of output feedback, tracking control, and the performance *** such, an adaptive output-feedback scheme is developed for global tracking with spatiotemporal performance specifications: arbitrarily given tracking accuracy and accuracy-ensured time. A simulation example supports the developed approach.

关键词： uncertain nonlinear systems output feedback prescribed performance unknown control direction dynamic high gain global tracking

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Theoretical study on the synergistic mechanism of Fe–Mn in sodium-ion batteries

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Particuology 2024年第10期93卷 284-290页

作者： Yang You Mingliang yuan School of Mineral Processing and Bioengineering Central South UniversityChangsha410083China

This article conducts first-principles calculations to initially explore the construction of two configurations,NaFeO_(2)(NFO)and NaMnO_(2)(NMO),and studies the mixing enthalpies under different Fe–Mn *** results indicate that NaFe3/8Mn5/8O_(2)(NFMO)exhibits the most thermodynamically stable *** calculations on the mixing enthalpies and volume changes during the sodium extraction process for NFO,NMO,and NFMO configurations are presented,along with the partial density of states(PDOS)and Bader charges of transition metals(TM)and *** calculations reveal the synergistic mechanism of Fe and *** and Mn can engage in more complex electron exchanges during sodium extraction,optimizing the internal electron density distribution and overall charge balance,thereby stabilizing the crystal structure and reducing the migration of Fe^(3+)to the sodium layers during deep sodium *** interaction between Fe’s 3d electrons and Mn’s 3d electrons through the shared oxygen atoms’2p orbitals occurs in the Fe–Mn–O *** interaction can lead to a rebalancing of the electron density around Mn³⁺atoms,mitigating the asymmetric electron density distribution caused by the d4 configuration of the lone Mn³⁺and suppressing the Jahn-Teller effect of Mn^(3+).Moreover,the synergistic effects between Fe and Mn can provide a more balanced charge distribution,reducing extreme changes to the charge state of oxygen atoms and decreasing the irreversible oxygen release caused by anionic redox reactions during deep sodium extraction,thereby enhancing the material’s *** in-depth study of the interaction mechanism at the microscopic level when co-doping Fe and Mn offers valuable insights for the rational design and development of high-performance cathode materials.

关键词： First-principles calculations Sodium-ionbatteries Layered oxides NaFe_(3/8)Mn_(3/8)O_(2)

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