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Catalytic behavior of Mo-Bi-Fe-Co-K-M-O(M=Ce,Gd,CeGd)catalysts for selective oxidation of isobutene

Journal of Rare Earths 2024年第1期42卷 84-93,I0003页

作者： Qinghui Li Huahua Zhao Jian yang Jun Zhao Liang Yan Huanling Song lingjun Chou State Key Laboratory for Oxo Synthesis and Selective Oxidation Lanzhou Institute of Chemical PhysicsChinese Academy of SciencesLanzhou730000China University of Chinese Academy of Sciences Beijing100049China

The further improvement of methacrolein(MAL)selectivity from isobutene(IB)oxidation is crucial and challenging.In this study,based on the typical Mo-Bi-Fe-Co-K-O mixed metal oxide,the rare earth element Gd-doped,Ce-doped and CeGd co-doped catalysts were prepared by co-precipitation strategy to increase the selectivity of MAL from 47.9%to 49.8%,64.2% and 68.6%,respectively.In order to elucidate in-depth the promoting effect of Ce and/or Gd,various characterizations were utilized including X-ray diffraction patterns(XRD),Raman,X-ray fluorescence spectrometry(XRF),X-ray photoelectron spectroscopy(XPS),O_(2)-temperature programmed desorption(O_(2)-TPD),H2-temperature programmed reduction(H2-TPR),CO_(2)-temperature programmed desorption(CO_(2)-TPD),IB-temperature programmed desorption(i-C4-TPD)and in-situ IB-Fourier transform infrared spectroscopy(IB-FTIR).Both Ce and Gd finely regulate the bulk and surface structure of the catalyst,thus altering the redox ability,oxygen mobility and storage ability and basicity.Compared with Ce,Gd addition slightly regulates the variation of Co^(2+)/Co^(3+)redox couples,greatly enhances the interaction among the components on the catalyst,thus only increases the content of surface oxygen species and has little effect on their mobility.While Cecontaining catalyst performs stronger oxygen storage and migration ability,thus leading to the overproduction of surface Odefectspecies,which are proposed to be the active sites for the production of MAL and COx.The CeGd co-doped catalyst possesses the proper content of surface Odefectspecies,thus exhibits much higher MAL selectivity.Moreover,the promoting mechanism of Ce and/or Gd over IB oxidation is proposed.Therefore,this work is helpful for understanding the influence of rare earth elements on the structure of mixed metal oxides and the olefin selective oxidation reaction.

关键词： Mixed metal oxide catalyst Rare earth element Isobutene Selective oxidation Methacrolein

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Identification of Motor Nuclei in the Medulla Oblongata of Carp for Biological Control

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Journal of Bionic Engineering 2024年第2期21卷 842-851页

作者： yang Zhao Yong Peng Yudong Wen lingjun Han Yanhong Yan Xueying Dong Hui Zhang Zheng Zhao Xiaoyue Liu School of Electrical Engineering Yanshan UniversityQinhuangdao066004China School of Mechanical Engineering Yanshan UniversityQinhuangdao066004China Key Laboratory of National Defense of Mechanical Structure and Material Science Under Extreme Conditions Yanshan UniversityQinhuangdao066004China Institute of Marine Science and Engineering Yanshan UniversityQinhuangdao066004China Shijiazhuang University Shijiazhuang050035China

Brain-controlled technology is the key technology in biological control,and the corresponding relationship between animal brain nuclei and motor behavior is the core.The purpose of this study was to explore the motor nuclei of the medulla oblongata in carp.The carps were subjected to electrical stimulation and chemical stimulation experiments,respectively,in the water-free state,and the effective chemical stimulation sites were injected with the pontamine sky blue solution.The brain tissue sections were obtained by paraffin tissue section technology and the neutral red staining method.By comparing the positions of the brain nuclei shown in earlier studies,the motor nerve nuclei in the medulla oblongata were identified.The brain electrode was implanted into the motor nucleus of the medulla oblongata,and the underwater control experiment and behavioral tests were carried out with different electrical stimulation parameters.The results showed that the abducens nucleus(NVI)was the motor nucleus that controls the ipsilateral steering,and the facial nucleus(NVII)was the motor nucleus that controls the forward movement.By adjusting the stimulation voltage and the stimulation pulse number,the carp can be stably controlled to achieve a left–right steering motion of 30°–180°and a forward motion of more than 80 cm/s.This study indicated that the quantitative control of the steering and forward behavior of the carp can be achieved by electrical stimulation of the NVI and NVII,which provided a certain experimental basis for the accurate control of the carp robot.

关键词： Biological control Carp Medulla oblongata motor nucleus Electrical stimulation technique Chemical stimulation technique

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Multi-feed multi-mode metasurface for independent orbital angular momentum communication in dual polarization

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Frontiers of Information Technology & Electronic Engineering 2023年第12期24卷 1776-1790页

作者： lingjun yang Sheng SUNI Wei E.I.SHA Long LI Jun HU School of Electronic Science and Engineering University of Electronic Science and Technology of ChinaChengdu611731China College of Information Science&Electronic Engineering Zhejiang UniversityHangzhou310027China School of Electronic Engineering Xidian UniversityXi’an710071China

The wavefront control of spin or orbital angular momentum(OAM)is widely applied in the optical and radio fields.However,most passive metasurfaces provide limited manipulations,such as the spin-locked wavefront,a static OAM combination,or an uncontrollable OAM energy distribution.We propose a reflection-type multi-feed metasurface to independently generate multi-mode OAM beams with dynamically switchable OAM combinations and spin states,while simultaneously,the energy distribution of carrying OAM modes is controllable.Specifically,four elements are proposed to overcome the spin-locked phase limitation by combining propagation and geometric phases.The robustness of these elements is analyzed.By involving the amplitude term and multi-feed technology in the design process,the proposed metasurface can generate OAM beams with a controllable energy distribution over modes and switchable mode combinations.OAM-based radio communication with four independent channels is experimentally demonstrated at 14 GHz by employing a pair of the proposed metasurfaces.The powers of different channels are adjustable by the provided amplitude term,and the maximum crosstalk is−9 dB,proving the effectiveness and practicability of the proposed method.

关键词： Orbital angular momentum(OAM) Geometric phase Multi-feed metasurface Spin-decoupled metasurface Vortex beam communication

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Metal-organic frameworks and their composites for advanced lithium-ion batteries:Synthesis,progress and prospects

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Journal of Energy Chemistry 2024年第2期89卷 449-470,I0011页

作者： Chengcai Liu Borong Wu Tao Liu Yuanxing Zhang Jingwen Cui lingjun Huang Guoqiang Tan Ling Zhang Yuefeng Su Feng Wu School of Material Science and Engineering Beijing Institute of TechnologyBeijing 100081China Chonging Innovation Center Beijing Institute of TechnologyChongqing 401120China Collaborative Innovation Center of Electric Vehicles in Beijing Beijing 100081China

Metal-organic frameworks(MOFs)are among the most promising materials for lithium-ion batteries(LIBs)owing to their high surface area,periodic porosity,adjustable pore size,and controllable chemical composition.For instance,their unique porous structures promote electrolyte penetration,ions transport,and make them ideal for battery separators.Regulating the chemical composition of MOF can introduce more active sites for electrochemical reactions.Therefore,MOFs and their related composites have been extensively and thoroughly explored for LIBs.However,the reported reviews solely include the applications of MOFs in the electrode materials of LIBs and rarely involve other aspects.A systematic review of the application of MOFs in LIBs is essential for understanding the mechanism of MOFs and better designing related MOFs battery materials.This review systematically evaluates the latest developments in pristine MOFs and MOF composites for LIB applications,including MOFs as the main materials(anode,cathode,separators,and electrolytes)to auxiliary materials(coating layers and additives for electrodes).Furthermore,the synthesis,modification methods,challenges,and prospects for the application of MOFs in LIBs are discussed.

关键词： Metal-organic frameworks Electrodes Electrolytes Separators Lithium-ion batteries

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Variations in Column Concentration of Greenhouse Gases in China and Their Response to the 2015–2016 El Ni?o Event

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Journal of Meteorological Research 2024年第3期38卷 608-619页

作者： Ningwei LIU lingjun XIA Youjun DOU Shaorou DONG Jing WEN Ying WANG Rui FENG Ruonan WANG Yuhe LI Institute of Atmospheric Environment China Meteorological Administration Jiangxi Ecological Meteorology Centre Beijing Xiangyuan Academy of Meteorological Observing Technology Climate Centre of Guangdong Province Guangdong Meteorological Service Liaoning Provincial Meteorological Equipment Support Centre Meteorological Centre of Northeast Air Traffic Administration of Civil Aviation of China

Since the industrial revolution,enhancement of atmospheric greenhouse gas concentrations as a result of human activities has been the primary cause of global warming.The monitoring and evaluation of greenhouse gases are significant prerequisites for carbon emission control.Using monthly data of global atmospheric carbon dioxide（CO2）and methane（CH4） column concentrations（hereinafter XCO2and XCH4,respectively） retrieved by the Greenhouse Gas Observation Satellite（GOSAT）,we analyzed the variations in XCO2and XCH4 in China during 2010-2022 after confirming the reliability of the data.Then,the influence of a strong El Nino event in 2015-2016 on XCO2and XCH4variations in China was further studied.The results show that the retrieved XCO2and XCH4from GOSAT have similar temporal variation trends and significant correlations with the ground observation and emission inventory data of an atmospheric background station,which could be used to assess the variations in XCO2and XCH4 in China.XCO2is high in spring and winter while XCH4 is high in autumn.Both XCO2and XCH4gradually declined from Southeast China to Northwest and Northeast China,with variation ranges of 401-406 and 1.81-1.88 ppmv,respectively;and the high value areas are located in the middle-lower yangtze River basin.XCO2and XCH4in China increased as a whole during 2010-2022,with rapid enhancement and high levels of XCO2and XCH4 in several areas.The significant increases in XCO2and XCH4over China in 2016 might be closely related to the strong El Ni?o-Southern Oscillation（ENSO） event during 2015-2016.Under a global warming background in 2015,XCO2and XCH4increased by 0.768% and 0.657% in 2016 in China.Data analysis reveals that both the XCO2and XCH4variations might reflect the significant impact of the ENSO event on glacier melting in the Tibetan Plateau.

关键词： greenhouse gases column concentration CO 2 CH 4 El Niño–Southern Oscillation (ENSO) El Niño

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Tuina alleviates neuropathic pain through regulate the activation of microglia and the secretion of inflammatory cytokine in spinal cord

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Journal of Traditional Chinese Medicine 2024年第4期 762-769页

作者： WU Zhiwei ZHU Qingguang KONG lingjun SONG Pengfei ZHOU Xin GUO Guangxin ZHANG Shuaipan HE Tianxiang CHENG Yanbin FANG Min Yueyang Hospital of Integrated Traditional Chinese and Western Medicine Shanghai University of Traditional Chinese Medicine Institute of Tuina Shanghai Institute of Traditional Chinese Medicine Shuguang Hospital Shanghai University of Traditional Chinese Medicine Department of Acupuncture and Tuina Shanghai University of Traditional Chinese Medicine

OBJECTIVE: To observe the analgesic effects of Tuina on neuropathic pain(NPP) and the underlying mechanisms. METHODS: Forty-eight Sprague-Dawley(SD) rats were assigned by random into three treatment groups: sham, chronic constriction injury(CCI), and Tuina. Each group contained sixteen rats. CCI model was generated by ligating the right sciatic nerve. Behavioral changes of CCI were assessed by the paw withdrawal threshold(PWT) and paw withdrawal latency(PWL). In addition, biochemical techniques such as immunofluorescence staining, enzyme-linked immunosorbent assay(ELISA) and Western blotting were used to profile levels of microglia activation and inflammatory factors in the spinal dorsal horn(SDH) of rats. Tuina(clockwise pressing and rubbing) was performed at Chengshan(BL57) to observe the analgesic effects on CCI rats and the underlying mechanisms. RESULTS: Rats with CCI experienced significant reduction in the PWT and PWL of the right hind paw relative to CCI group at day 3. Tuina treatment rescued this situation significantly on days 10 and 14. Besides, Iba-1, microglia M1 receptor CD68, tumor necrosis factor-α(TNF-α), and interleukin-1β(IL-1β) were higher in the right SDH for CCI group compared to the sham group on day 14. As expected, Tuina partially downregulated the CCI-induced overexpressed Iba-1, CD68, TNF-α, and IL-1β in the SDH of CCI model. CONCLUSION: Tuina induces a time-dependent cumulative analgesic effect in CCI rats by inhibiting the activation of microglia and the secretion of IL-1β and TNF-α in SDH.

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自诱导因子-2激活芳香烃受体缓解新生小鼠坏死性小肠结肠炎肠道损伤

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陆军军医大学学报 2024年第12期46卷 1387-1394页

作者：胡灵君芦起重庆医科大学附属儿童医院新生儿科国家儿童健康与疾病临床医学研究中心儿童发育疾病研究教育部重点实验室儿科学重庆市重点实验室重庆400014 重庆医科大学附属儿童医院宜宾医院新生儿科四川宜宾644000

目的探讨自诱导因子-2(autoinducer-2,AI-2)缓解新生鼠坏死性小肠结肠炎(necrotizing enter colitis,NEC)模型肠道损伤的作用机制。方法将36只7 d龄C57BL/6J小鼠随机分为(n=12):对照组(Control组,由母鼠喂养)、NEC组(采用配方奶+脂多糖... 详细信息

目的探讨自诱导因子-2(autoinducer-2,AI-2)缓解新生鼠坏死性小肠结肠炎(necrotizing enter colitis,NEC)模型肠道损伤的作用机制。方法将36只7 d龄C57BL/6J小鼠随机分为(n=12):对照组(Control组,由母鼠喂养)、NEC组(采用配方奶+脂多糖灌胃、缺氧和冷应激的方法诱导新生鼠NEC模型)及NEC+AI-2组(建模的配方奶中添加AI-2溶液)。记录造模期间各组小鼠体质量及存活率。建模3 d后处死小鼠,HE染色观察末端回肠组织病理学改变;RT-qPCR检测肠组织芳香烃受体(aryl hydrocarbon receptor,AHR)、细胞色素P4501A1(cytochrome P4501A1,CYP1A1)、肿瘤坏死因子-α(tumor necrosis factor-α,TNF-α)、白细胞介素-6(interleukin-6,IL-6)、白细胞介素-22(interleukin-22,IL-22)基因的表达水平;Western blot检测肠组织AHR、CYP1A1蛋白表达水平;酶联免疫吸附试验(ELISA)检测肠组织中TNF-α、IL-6、IL-22蛋白表达水平。结果与NEC组相比,NEC+AI-2组新生鼠存活率增加(91.7%vs 66.7%,P<0.05);肠道病理损伤评分降低(1.33±0.21 vs 2.67±0.33,P<0.05);肠组织中AHR、CYP1A1在基因及蛋白表达水平均明显升高(均P<0.05);肠组织中促炎因子TNF-α、IL-6表达水平降低(均P<0.05),抑炎因子IL-22表达水平增加(均P<0.05)。肠道AHR表达及活化与肠道病理损伤评分呈明显的负相关关系(P<0.001)。结论AI-2可通过激活肠道中AHR调节炎症反应缓解NEC新生鼠的肠道损伤。

关键词：芳香烃受体自诱导因子-2 坏死性小肠结肠炎炎症反应

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基于IWOA-ELM算法的脑电情绪识别方法研究

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生物医学工程学杂志 2024年第1期41卷 1-8页

作者：谢松云雷凌俊孙江徐建西北工业大学电子信息学院西安710129 西北工业大学医学研究院西安710129

情绪是人类重要的生理属性,情绪识别技术可以更好地辅助人类进行自我认识。本文针对不同受试者之间的脑电信号(EEG)存在巨大差异的难点,在传统鲸鱼优化算法(WOA)中引入新机制,加速算法的优化和收敛。同时,将改进的鲸鱼优化算法(IWOA)用... 详细信息

情绪是人类重要的生理属性,情绪识别技术可以更好地辅助人类进行自我认识。本文针对不同受试者之间的脑电信号(EEG)存在巨大差异的难点,在传统鲸鱼优化算法(WOA)中引入新机制,加速算法的优化和收敛。同时,将改进的鲸鱼优化算法(IWOA)用于搜索极限学习机模型(ELM)中的最佳训练方案,包括最佳特征集、训练参数以及脑电通道。纳入24种常见的EEG情绪特征进行测试,发现不同受试者最佳脑电情绪特征之间存在一定特异性,同时也具有共性。本文所提方法在脑电情绪识别中获得92.19%的平均识别准确率,显著减少了手动调试模型的工作量,且具有更高的识别精度和更短的训练时间,相较于对照方法具备更优越的性能,为情绪脑电信号解码研究提供了新的思路。

关键词：脑电图情绪识别鲸鱼优化算法特征选择极限学习机

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重组日本血吸虫半胱氨酸蛋白酶抑制剂对急性肝损伤小鼠的保护作用及机制

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南方医科大学学报 2024年第6期44卷 1126-1134页

作者：鲁玲君杨小迪张华平梁媛石秀兰周鑫山西医科大学病理生理教研室山西太原030002 蚌埠医科大学人体寄生虫学教研室//安徽省感染与免疫重点实验室安徽蚌埠233030 鹤壁职业技术学院医学检验教研室河南鹤壁458030 太原市第三人民医院内镜室山西太原030012

目的探讨重组日本血吸虫半胱氨酸蛋白酶抑制剂对LPS/D-GalN诱导的急性肝损伤小鼠的保护作用及机制。方法将72只雄性C57BL/6J小鼠(6~8周龄)随机分为正常对照组、LPS/D-GaIN模型组、LPS/D-GaIN+rSj-Cys治疗组和rSj-Cys对照组(n=18)。LPS... 详细信息

目的探讨重组日本血吸虫半胱氨酸蛋白酶抑制剂对LPS/D-GalN诱导的急性肝损伤小鼠的保护作用及机制。方法将72只雄性C57BL/6J小鼠(6~8周龄)随机分为正常对照组、LPS/D-GaIN模型组、LPS/D-GaIN+rSj-Cys治疗组和rSj-Cys对照组(n=18)。LPS/D-GaIN组和LPS/D-GaIN+rSj-Cys组小鼠均腹腔注射LPS(10μg/kg)和D-GaIN(700 mg/kg)造模;造模后30 min,LPS/D-GaIN+rSj-Cys组及rSj-Cys对照组小鼠均腹腔注射rSj-Cys(1.25 mg/kg),正常对照组小鼠注射等体积PBS。造模6 h后,每组随机挑选8只小鼠处死,收集小鼠血清及肝组织,进行后续检测,每组剩余10只分别在3、6、12、24 h观察其生存情况,并计算生存率。检测血清丙氨酸转移酶(ALT)、天冬氨酸转移酶(AST)水平,苏木精-伊红(HE)染色观察各组小鼠肝脏组织病理形态,采用ELISA检测小鼠血清炎性因子肿瘤坏死因子(TNF-α)和白细胞介素(IL-6)表达,采用免疫组化法检测肝组织巨噬细胞表面标记物CD68表达水平,采用免疫组化和免疫印迹法检测肝组织Bax、Bcl-2蛋白水平,采用TUNEL检测肝细胞凋亡情况,采用免疫印迹法检测肝组织内质网应激相关蛋白表达水平。结果模型组小鼠12 h生存率为30%,rSj-Cys治疗组小鼠12 h生存率为80%。模型组小鼠24 h生存率为10%,rSj-Cys治疗组小鼠24 h生存率为60%;与正常对照组相比,LPS/D-GaIN模型组小鼠血清中AST、ALT、IL-6、TNF-α含量均显著上升(P0.05)。结论 rSj-Cys通过抑制内质网应激,减轻炎症和肝细胞凋亡缓解LPS/D-GalN引起的小鼠急性肝损伤。

关键词：急性肝损伤日本血吸虫半胱氨酸蛋白酶抑制剂内质网应激炎症凋亡

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采动诱发断层活化响应机制特征研究

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煤田地质与勘探 2024年第4期52卷 12-20页

作者：孙文斌郝建邦戴宪政孔令君山东科技大学能源与矿业工程学院山东青岛266590 煤炭资源高效开采与洁净利用国家重点实验室北京100013 陕西省煤矿水害防治技术重点实验室陕西西安710077

在煤矿开采过程中,采动引起的应力扰动是导致断层活化的关键因素,这种断层活化是煤矿安全开采面临的主要挑战之一。断层活化不仅易于诱发煤矿冲击地压、底板突水等地质灾害,而且对开采安全构成重大威胁。为分析采动效应下断层构造带的... 详细信息

在煤矿开采过程中,采动引起的应力扰动是导致断层活化的关键因素,这种断层活化是煤矿安全开采面临的主要挑战之一。断层活化不仅易于诱发煤矿冲击地压、底板突水等地质灾害,而且对开采安全构成重大威胁。为分析采动效应下断层构造带的演化机制,通过Flac^(3D)数值模拟软件及相似材料模拟试验,建立采动条件下断层的应力-位移响应模型,进行相关研究。结果表明:开采过程中,扰动对于应力的影响作用要先比位移产生,且应力会出现峰值;当应力出现峰值,达到屈服极限后,扰动对于位移的影响作用逐渐显现;随着工作面不断推进,采动导致上覆岩层大面积垮落,致使上覆岩层与断层带贯通,并逐渐诱发断层带的活化现象;采动影响下,断层活化并不是一次性全阶段活化,而是由上部到下部的逐渐活化,其具有明显的空间性、阶段性特征。明确了断层活化的发生特征,能够有效提高对于断层活化间接引起的冲击地压、底板突水等一系列地质灾害事故的预警预防,对于煤矿安全高效开采生产具有重要意义。

关键词：断层活化采动影响数值模拟相似试验应力分析

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