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Reversible Mn^(2+)/Mn^(4+)double-electron redox in P3-type layer-structured sodium-ion cathode

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Journal of Energy Chemistry 2024年第2期89卷 79-88,I0004页

作者： Jie Zeng Jian Bao ya Zhang Xun-Lu Li Cui Ma Rui-Jie Luo Chong-Yu Du Xuan Xu Zhe Mei Zhe Qian Yong-Ning Zhou Department of Materials Science Fudan UniversityShanghai 200433China Shanghai Xuanyi New Energy Development Co. LtdShanghai 201800China Global Institute of Future Technology Shanghai Jiao Tong UniversityShanghai 200240China

The balance between cationic redox and oxygen redox in layer-structured cathode materials is an important issue for sodium batteries to obtain high energy density and considerable cycle *** redox can contribute extra capacity to increase energy density,but results in lattice instability and capacity fading caused by lattice oxygen gliding and oxygen *** this work,reversible Mn^(2+)/Mn^(4+)redox is realized in a P3-na_(0.65)Li_(0.2)Co_(0.05)Mn_(0.75)O_(2)cathode material with high specific capacity and structure stability via Co *** contribution of oxygen redox is suppressed significantly by reversible Mn^(2+)/Mn^(4+)redox without sacrificing capacity,thus reducing lattice oxygen release and improving the structure *** X-ray techniques reveal that P3 phase is well maintained in a wide voltage window of 1.5-4.5 v ***^(+)/na even at 10 C and after long-term *** is disclosed that charge compensation from Co/Mn-ions contributes to the voltage region below 4.2 v and O-ions contribute to the whole voltage *** synergistic contributions of Mn^(2+)/Mn^(4+),Co^(2+)/Co^(3+),and O^(2-)/(O_n)^(2-)redox in P3-na_(0.65)Li_(0.2)Co_(0.05)Mn_(0.75)O_(2)lead to a high reversible capacity of 215.0 m A h g^(-1)at 0.1 C with considerable cycle *** strategy opens up new opportunities for the design of high capacity cathode materials for rechargeable batteries.

关键词： Sodium batteries Cathode materials Layered structure Co substitution

Cu0/Cu2+修饰Ti3C2Tx二维材料用于电催化还原二氧化碳

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分析化学 2024年第2期52卷 240-249页

作者：刘楚存王亚丽崔慧娜姚垚宁夏回族自治区绿色催化材料与技术重点实验室宁夏师范学院化学化工学院

以Ti3AlC2和CuCl2·2H2O为前驱体，成功制备了Cu0纳米颗粒修饰和Cu2+自插层的手风琴状二维催化剂Cu0/Cu2+-Ti3C2Tx，用于电催化还原CO2。对材料的电化学性能进行了测试，结果表明，在CO2饱和的0.5 mol/L KHCO3电解液中，与原始的Ti3AlC... 详细信息

以Ti3AlC2和CuCl2·2H2O为前驱体，成功制备了Cu0纳米颗粒修饰和Cu2+自插层的手风琴状二维催化剂Cu0/Cu2+-Ti3C2Tx，用于电催化还原CO2。对材料的电化学性能进行了测试，结果表明，在CO2饱和的0.5 mol/L KHCO3电解液中，与原始的Ti3AlC2相比，Cu2+/Cu0-Ti3C2Tx催化剂电催化CO2转化为乙烯(C2H4)的起始电位从-0.65 v(vsRHE)降至-0.01 v(vs RHE)，最大电流密度从0.19 mA/cm2增至2.50 mA/cm2, Tafel斜率从181 mv/dec减至32 mv/dec，双电层电容(Cdl)值从2.61 mF/cm2增至55.06 mF/cm2，表现出更高的催化活性和更快的电子转移速度(电荷转移电阻(Rct)值仅为16.9Ω)，并且具有更大的电化学活性面积和极佳的稳定性。这为今后设计和制备CO2的电催化还原反应(ECR)催化剂提供了一种有前景的方法。

关键词：铜钛碳化铝插层电催化二氧化碳乙烯

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Characterization of a pangolin SARS-Cov-2-related virus isolate that uses the human ACE2 receptor

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Science China(Life Sciences) 2024年第7期67卷 1502-1513页

作者： Luo-Yuan Xia Xue-Feng Wang Xiao-Ming Cui Yi-Ming Zhang Zhen-Fei Wang En-Tao Li Chang-Fa Fan Ke Song Yuan-Guo Li Run-Ze Ye Fang-Xu Li Dai-Yun Zhu Jie Zhang Zhuang-Zhuang Shi Ming-Zhu Zhang Liang-Jing Li Shi-Jing Shen Song Jin ya-Wei Zhang Wei-Guang Fu Lin Zhao Wen-hao Wang Tie-Cheng Wang You-Chun Wang Jia-Fu Jiang yan-Ling Hu na Jia Yu-Wei Gao Wu-Chun Cao Institute of EcoHealth School of Public HealthCheeloo College of MedicineShandong UniversityJinan 250012China Changchun veterinary Research Institute Changchun 130122China State Key Laboratory of Pathogen and Biosecurity Beijing Institute of Microbiology and EpidemiologyBeijing 100071China Division of Animal Model Research Institute for Laboratory Animal ResourcesNational Institutes for Food and Drug ControlBeijing 102629China national Institutes for Food and Drug Control Beijing 102629China Life Sciences Institute Guangxi Medical UniversityNanning 530020China College of Life Sciences Shandong Normal UniversityJinan 250014China Research Unit of Discovery and Tracing of natural Focus Diseases Chinese Academy of Medical SciencesBeijing 100071China

various SARS-Cov-2-related coronaviruses have been increasingly identified in pangolins,showing a potential threat to *** we report the infectivity and pathogenicity of the SARS-Cov-2-related virus,PCov-GX/P2v,which was isolated from a Malayan pangolin(Manis javanica).PCov-GX/P2v could grow in human hepatoma,colorectal adenocarcinoma cells,and human primary nasal epithelial *** replicated more efficiently in cells expressing human angiotensin-converting enzyme 2(haCE2)as SARS-Cov-2 *** intranasal inoculation to the haCE2-transgenic mice,PCov-GX/P2v not only replicated in nasal turbinate and lungs,but also caused interstitial pneumonia,characterized by infiltration of mixed inflammatory cells and multifocal alveolar *** population immunity established by SARS-Cov-2 infection and vaccination may not protect people from PCov-GX/P2v *** findings further verify the haCE2 utility of PCov-GX/P2v by in vivo experiments using authentic viruses and highlight the importance for intensive surveillance to prevent possible cross-species transmission.

关键词： pangolin SARS-Cov-2-related virus infectivity pathogenicity human cell lines human ACE2 receptor haCE2-transgenic mice

C/2015 O1: A long-period comet with photometric observations

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Research in Astronomy and Astrophysics 2019年第5期19卷 27-30页

作者： Xuan Zhang Jin-Zhong Liu ya-Hui Wang Li-na Lu Xinjiang Astronomical Observatory Chinese Academy of Sciences School of Physical Science and Technology Xinjiang University University of Chinese Academy of Sciences

In this work, we report the observations of the long-period comet C/2015 O1 performed on2018 January 29–30 and April 13 with the nanshan 1-meter wide-field telescope operated by Xinjiang Astronomical Observatory. We obtain the morphological features of C/2015 O1 using an image enhancement method, and calculate the dust-activity parameter Afρ and the coma color based on photometric analysis. An obvious fan-shaped structure was observed at different observation times. We find that the activity of C/2015 O1 gradually decreases as the comet advances toward perihelion and the observed B-v and v-R colors are consistent with those of other comets.

关键词： comets general-comets individual(C/2015 O1)

Revolution CT联合不同权重ASIR-v在胸痛三联征成像中的应用价值比较

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中国CT和MRI杂志 2024年第4期22卷 55-58页

作者：郑晓娜周方丽刘雅兰河南省信阳市中心医院CT诊断科河南信阳464000

目的探讨Revolution CT联合不同权重多模型迭代重建技术(ASIR-v)在胸痛三联征(TRO)成像中的应用价值。方法选取我院2022年8月~2023年3月收治的90例胸痛患者进行研究,入院后接受TRORevolution CT平扫。按随机数字表法分成滤波反投影(FBP... 详细信息

目的探讨Revolution CT联合不同权重多模型迭代重建技术(ASIR-v)在胸痛三联征(TRO)成像中的应用价值。方法选取我院2022年8月~2023年3月收治的90例胸痛患者进行研究,入院后接受TRORevolution CT平扫。按随机数字表法分成滤波反投影(FBP)组与ASIR-v组各45例。FBP组采用FBP技术进行图像重组,ASIR-v组采用不同权重(10%、30%、50%、70%、90%)前置ASIR-v技术重组。记录两组辐射剂量长度乘积(DLP)、有效剂量(ED),比较不同重组方式及不同权重下冠状动脉、升主动脉、降主动脉、肺动脉干的平均CT值、噪声值、信噪比(SNR)、对比信噪比(CNR),由2名经验丰富的影像科医生进行主观图像质量评分。结果ASIR-v组DLP、ED低于FBP组(Pv不同权重的血管腔噪声值低于FBP,血管腔SNR、CNR与主观图像质量评分高于FBP(Pv权重50%、70%、90%的噪声值低于ASIR-v权重10%、30%的噪声值(Pv权重50%、70%、90%的SNR、CNR高于ASIR-v权重10%、30%的SNR、CNR(Pv权重50%、70%的主观评分高于ASIR-v权重10%、30%、90%的主观评分(Pvolution CT联合ASIR-v技术能减少辐射剂量,ASIR-v权重50%、70%时对血管腔与解剖结构的显示良好,血管腔噪声值较低,SNR、CNR较高,能满足诊断需求。

关键词：胸痛三联征权重多模型迭代重建技术 Revolution CT

Influence of oxygen non-stoichiometry on physical properties of NdSr_2Mn_2O_(7±δ)

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Journal of Rare Earths 2015年第3期33卷 282-288页

作者： A.M.yankin A.v.Fetisov O.M.Fedorova S.A.Uporov v.ya.Mitrofanov Laboratory of Static and Kinetics of Processes Institute of Metallurgy of Ural Branсh of Russian Academy of Science Amundsen St. 101 Ekaterinburg 620016 Russia

Nd Sr2Mn2O7＋δ compounds were synthesized by ceramic method under three different cooling conditions. The Nd Sr2Mn2O7＋δ samples were characterized by powder X-ray diffraction（XRD）. Oxygen non-stoichiometry data for the studied powders were determined by using gravimetric and X-ray photoelectron spectroscopy（XPS） methods. The correlation of cooling method and oxygen as non-stoichiometry was established. The electroconductivity in samples was studied by using four-point probe method, and the strong correlation with non-stoichiometry was found out. Magnetization measurements were carried out. It was found that the magnetic and transport properties of the samples were also influenced by oxygen non-stoichiometry. The evolution of the magnetic properties could be explained by the formation of magnetic clusters in the vicinity of oxygen vacancies（ov） and strong competition between the superexchange and double exchange interactions.

关键词： oxygen stoichiometry gravimetric analysis electroconductivity magnetic properties rare earths

A novel process for the recovery of iron,titanium,and vanadium from vanadium-bearing titanomagnetite:sodium modification–direct reduction coupled process

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International Journal of Minerals,Metallurgy and Materials 2017年第5期24卷 504-511页

作者： Yi-min Zhang Ling-yun Yi Li-na Wang De-sheng Chen Wei-jing Wang ya-hui Liu Hong-xin Zhao Tao Qi University of Chinese Academy of Sciences national Engineering Laboratory for Hydrometallurgical Cleaner Production Technology Key Laboratory of Green Process and Engineering Institute of Process EngineeringChinese Academy of Sciences

A sodium modification–direct reduction coupled process was proposed for the simultaneous extraction of v and Fe from vanadium- bearing titanomagnetite. The sodium oxidation of vanadium oxides to water-soluble sodium vanadate and the transformation of iron oxides to metallic iron were accomplished in a single-step high-temperature process. The increase in roasting temperature favors the reduction of iron oxides but disfavors the oxidation of vanadium oxides. The recoveries of vanadium, iron, and titanium reached 84.52%, 89.37%, and 95.59%, respectively. Moreover, the acid decomposition efficiency of titanium slag reached 96.45%. Compared with traditional processes, the novel process provides several advantages, including a shorter flow, a lower energy consumption, and a higher utilization efficiency of vanadium-bearing titanomagnetite resources. © 2017, University of Science and Technology Beijing and Springer-verlag Berlin Heidelberg.

关键词： Energy utilization Iron Leaching Magnetic separation Metal recovery Metallic compounds Oxides Slags Sodium Titanium vanadium

vestibular-evoked myogenic potentials recorded from miniature pigs and rats

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Journal of Otology 2016年第3期11卷 138-143页

作者： Li ya Zhang yan Qiu Shi Wei Yuan na Shi Xi Qiao Yuehua Shi-Ming yang Xuzhou Medical College Audiology Center Department of Otorhinolaryngology Head and Neck Surgery First Hospital of Jilin UniversityChangchun Department of OtolaryngologydH ead & Neck Surgery PLA Institute of OtolaryngologyChinese PLA General Hospital Clinical Audiology Center Affiliated Hospital of Xuzhou Medical College

Objective:To report vestibular evoked myogenic potentials from different recording sites(neck extensor or masseter muscles) in miniature pigs and ***:Potentials were recorded using 1000 Hz tone bursts from the neck extensor muscle or masseter muscle in normal adult Bama miniature pigs and rats anesthetized with 3%pentobarbital sodium and Sumianxin Ⅱ.Results:At 80 dB SPL,the first positive wave(P wave) of vEMPs was recognizable in 58%of rats with a latency of 6.45±0.23 ms and an amplitude of 1.45±0.49 μv when recorded from the neck extensor muscle,and in 50%of rats with a latency of 6.38±0.34 ms and an amplitude of 1.57±0.35 μv when recorded from the masseter *** miniature pigs,at the same stimulus intensity,P wave was recognizable in 58%of the animals with a latency of 7.65±0.64 ms and an amplitude of 1.66±0.34 μv when recorded from the neck extensor muscle,and in 50%of the animals with a latency of 7.65±0.64 ms and an amplitude of 0.31±0.28 μv when recorded from the masseter ***:vEMP can be induced from both neck extensor and masseter muscles in the miniature pig and *** a given species,the site of recording affects P wave induction rate and amplitude but not *** and repeatability analysis suggests that the masseter muscle is a better recording site in miniature pigs while the cervical extensor is a better recording site in *** a given recording site,both latency and amplitude of the P wave are slightly greater in miniature pigs than in rats.

关键词： vestibular evoked myogenic potentials Miniature pigs Rats Masseter muscle Cervical extensor muscle

Echinococcus Granulosus 14-3-3 Protein:A Potential vaccine Candidate Against Challenge with Echinococcus Granulosus in Mice

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Biomedical and Environmental Sciences 2012年第3期25卷 352-358页

作者： LI Zong Ji WANG ya na WANG Qi ZhaO Wei Center of Scientific Technology of Ningxia Medical University Yinchuan 750004 Ningxia Hui Autonomous Region China Department of Medical Genetics & Cell Biology Ningxia Medical University Yinchuan 750004 Ningxia Hui Autonomous Region China The Affiliated Hospital of Ningxia Medical University Yinchuan 750004 Ningxia Hui Autonomous Region China

Objective To investigate the protective immunity against Echinococcus granulosus in mice immunized with rEg14-3-3. Methods ICR mice were subcutaneously immunized three times with rEg14-3-3, followed by the challenge with Echinococcus granulosus protoscoleces intraperitoneally and then sacrificed after six months of post-challenge to detect the proliferation of splenocytes by MTT assay, and to measure the secretion of IL-2, IL-4, IL-20, and IFN -y by ELISA. The rate of reduced hydatid cyst and the levels of IgE, igG and IgG subclasses in sera were examined. Results Mice vaccinated with rEg14-3-3 and challenged with protoscoleces revealed significant protective immunity of 84.47%. ELISA analysis indicated that the immunized mice generated specific high levels of IgG and the prevailing isotypes of IgG were IgG1 and IgG2a. Splenocytes from mice immunized with rEg14-3-3 showed a significant proliferation response. The secretion of IFN-v and IL-2 increased significantly in the vaccinated mice whereas there was no significant difference in IL-4 and IL-20 levels between vaccinated and control mice. Conclusion The results indicate that the rEg24-3-3 vaccine could induce a high level of protective immunity as a promising vaccine candidate to prevent cystic echinococcosis.

关键词： Eg14-3-3 Echinococcus granulosus vaccine Immunoprotection