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Novel internal photoemission in manganite/ZnO heterostructure

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Science China Chemistry 2013年第5期56卷 583-587页

作者： ZHANG JiaQi HUANG KeKe si wenzhe WU XiaoFeng CHENG Gang FENG ShouHua State Key Laboratory of Inorganic Synthesis and Preparative Chemistry College of Chemistry Jilin University

A novel photovoltaic phenomenon of internal photoemission was found in a low cost manganite La0.62Ca0.29K0.09MnO3 （LCKMO）/zinc oxide （ZnO） heterojunction bilayers grown on ITO substrate by pulsed laser deposition （PLD） at relative low growth temperature. The heterostructure ITO/LCKMO/ZnO/A1 exhibits reproducible rectifying characteristics and light cur- rent under continuous laser irradiation of 2 = 325 nm. We report here the influence of LCKMO/ZnO bilayers＇ thickness on the electrical and photoelectric properties of the heterostructure at room temperature. The power conversion efficiency （PCE） is achieved when the LCKMO and ZnO layers are thin enough or the full space charge layer is sufficient. We obtained the maximum value of PCE of 0.0145% when the thicknesses of LCKMO and ZnO layers are 25 and 150 nm, respectively. The open circuit voltage is 0.04 V under this condition due to the internal photoemission.

关键词： heterojunction photoelectric manganite ZnO

Advances in the treatment of multi-pollutant flue gas in China's building materials industry

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Journal of Environmental Sciences 2023年第1期123卷 400-416页

作者： Shangchao Xiong Jianjun Chen Hao Liu wenzhe si Yue Peng Xuecheng Wu Huan Liu Junhua Li State Key Joint Laboratory of Environment simulation and Pollution Control School of EnvironmentTsinghua UniversityBeijing 100084China Faculty of Geosciences and Environmental Engineering Southwest Jiaotong UniversityChengdu 610031China State Key Laboratory of Clean Energy Utilization School of Energy EngineeringZhejiang UniversityHangzhou 310027China

In most of the world’s building material industries,the control of flue gas pollutants mainly focuses on a single ***,given the large capacity and high contribution of China’s building materials industry to global air pollution,the need to develop multipollutant emission reduction technology is ***,China has focused on reducing the emissions of flue gas pollutants in the building materials industry,established many key research and development projects,and gradually implemented more stringent pollutant emission *** project focuses on the most recent advances in flue gas emission control technology in China’s building materials industry,including denitration,dust removal,desulfurization,synergistic multi-pollutant emission reduction,and the construction of pilot research and demonstration projects for pollutant removal in several building material *** this basis,revised pollutant limits in flue gas emitted in China’s building material industry are proposed.

关键词： Building materials industry Multi pollutants Emission control Flue gas Demonstration project

Preparation of Solid Waste-Based Activated Carbon and Its Adsorption Mechanism for Toluene

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China Petroleum Processing & Petrochemical Technology 2022年第1期24卷 100-110页

作者： Li Zhi Li Yunpeng Liu Jun si wenzhe Zhang Yongfa Li Junhua Taiyuan University of Technology College of Chemistry and Chemical EngineeringState Key Laboratory of Clean and Efficient Coal UtilizationTaiyuan 030024 Tsinghua University College of EnvironmentNational Engineering Research Center for Coordinated Control of Air Pollutants and Greenhouse GasesBeijing 100084 Zibo Pengda Environmental Protection Technology Co. Ltd.Zibo 255420

Regenerated activated carbon(RAC)samples were prepared by carbon activation using waste activated carbon from solid waste resources as the carbon source precursor coupled with adding alkaline additives,and then were further modified by potassium ferrate to finally prepare high-performance carbon for VOCs *** the same time,the samples before and after modification were systematically studied through characterization techniques such as SEM,Raman spectrometry,FT-IR,XPS,and dynamic/static *** results showed that the specific surface area and pore volume of the RAC after modification by the strong oxidant potassium ferrate increased by 1.4 times;the degree of defects was enhanced and the content of oxygen-containing functional groups on the surface increased *** them,the sample modified with potassium ferrate for 24 h had the best dynamic toluene adsorption performance(375.5 mg/g),and the dynamic adsorption capacity was twice that of the original sample(192.8 mg/g).The static adsorption test found that the maximum adsorption capacity of RAC-6%K_(2)FeO_(4)+H_(2)SO_(4)-24h was 796 mg/g,which indicated that the potassium ferrate modification treatment could significantly increase the VOCs adsorption performance of *** addition,through consecutive toluene adsorption-desorption cycle tests,it was found that the RAC-6%K_(2)FeO_(4)+H_(2)SO_(4)-24h sample still retained 91%of adsorption activity after the fifth regeneration *** indicates that RAC-6%K_(2)FeO_(4)+H_(2)SO_(4)-24h has good cycle stability and great application value for the efficient purification of industrial waste VOCs gas.

关键词： waste activated carbon toluene adsorption potassium ferrate modification oxygen-containing functional groups regeneration ability

The existence of a nonclassical TCA cycle in the nucleus that wires the metabolic-epigenetic circuitry

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signal Transduction and Targeted Therapy 2021年第12期6卷 3666-3683页

作者： Xujun Liu wenzhe si Lin He Jianguo Yang Yani Peng Jie Ren Xiaoping Liu Tong Jin Huajing Yu Zihan Zhang Xiao Cheng Wenting Zhang Lu Xia Yunchao Huang Yue Wang Shumeng Liu Lin Shan Yu Zhang Xiaohan Yang Haixia Li Jing Liang Luyang Sun Yongfeng Shang Key Laboratory of Carcinogenesis and Translational Research(Ministry of Education) Department of Biochemistry and Molecular BiologyDepartment of Laboratory MedicinePeking University Third HospitalSchool of Basic Medical SciencesPeking University Health Science Center100191 BeijingChina Department of Clinical Laboratory Peking University First Hospital100034 BeijingChina Department of Biochemistry and Molecular Biology School of Basic Medical SciencesHangzhou Normal University311121 HangzhouChina Department of Biochemistry and Molecular Biology School of Basic Medical SciencesCapital Medical University100069 BeijingChina Department of Integration of Chinese and Western Medicine School of Basic Medical SciencesPeking University Health Science Center100191 BeijingChina

The scope and variety of the metabolic intermediates from the mitochondrial tricarboxylic acid(TCA)cycle that are engaged in epigenetic regulation of the chromatin function in the nucleus raise an outstanding question about how timely and precise supply/consumption of these metabolites is achieved in the *** report here the identification of a nonclassical TCA cycle in the nucleus(nTCA cycle).We found that all the TCA cycle-associated enzymes including citrate synthase(CS),aconitase 2(ACO2),isocitrate dehydrogenase 3(IDH3),oxoglutarate dehydrogenase(OGDH),succinyl-CoA synthetase(SCS),fumarate hydratase(FH),and malate dehydrogenase 2(MDH2),except for succinate dehydrogenase(SDH),a component of electron transport chain for generating ATP,exist in the *** showed that these nuclear enzymes catalyze an incomplete TCA cycle similar to that found in *** propose that the nTCA cycle is implemented mainly to generate/consume metabolic intermediates,not for energy *** demonstrated that the nTCA cycle is intrinsically linked to chromatin dynamics and transcription ***,our study uncovers the existence of a nonclassical TCA cycle in the nucleus that links the metabolic pathway to epigenetic regulation.

关键词： metabolic cycle Together

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水蓄冷对光伏半导体制冷系统节能的影响

河南农业大学学报 2017年第4期51卷 530-535页

作者：司闻哲刘圣勇远方鲁杰张品王炯河南农业大学农业部农村可再生能源新材料与装备重点实验室河南郑州450002 生物质能源河南省协同创新中心河南郑州450002

以冬季气象条件下的光伏发电系统和(25±0.5)℃的室温条件下的制冷系统以及蓄冷材料为研究对象进行试验,对比晴天和阴天的光照强度与电流、电压的关系、相同室温无负载的制冷温度曲线,研究了不同气象条件下,光伏发电系统和制冷系统的性... 详细信息

以冬季气象条件下的光伏发电系统和(25±0.5)℃的室温条件下的制冷系统以及蓄冷材料为研究对象进行试验,对比晴天和阴天的光照强度与电流、电压的关系、相同室温无负载的制冷温度曲线,研究了不同气象条件下,光伏发电系统和制冷系统的性能,并研究了蓄冷材料与负载的质量比为1∶2时,蓄冷材料对光伏半导体制冷系统的影响。研究结果表明,蓄冷材料的使用可以在光照充足时储存冷量,减少新加入负载时的运行时间;可以提高停止时间与运转时间比,减少1 d内的运行时间,实现降低系统能耗的目标,所测试的晴天和阴天的节能效率分别为8.5%、6.8%。

关键词：水蓄冷光伏半导体制冷节能

改性钒基整体式催化剂的制备及其对燃煤烟气中甲苯与一氧化氮的同步去除性能

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环境科学学报 2021年第6期41卷 2302-2310页

作者：李剑晗肖高飞郦杲辉陈建军司文哲张益兰胡芸华南理工大学环境与能源学院广州510006 广东省大气环境与污染控制重点实验室广州510006 清华大学盐城环境工程技术研发中心盐城224000

采用工业上简易可行的单组分浸渍法和多组分浸渍法制备了一系列Cu/Fe/Mo改性的钒钛基整体式催化剂,考察了不同整体式催化剂制备工艺及浸渍液浓度对催化剂在模拟燃煤烟气中对甲苯和NO同步去除的性能,并优选出适应燃煤烟气的改性催化剂制... 详细信息

采用工业上简易可行的单组分浸渍法和多组分浸渍法制备了一系列Cu/Fe/Mo改性的钒钛基整体式催化剂,考察了不同整体式催化剂制备工艺及浸渍液浓度对催化剂在模拟燃煤烟气中对甲苯和NO同步去除的性能,并优选出适应燃煤烟气的改性催化剂制备工艺及配方.结果表明,使用单组分浸渍法制备的浸渍液浓度为0.5%的Fe改性钒钛基整体式催化剂具有最优的活性和选择性,在350℃下对甲苯和NO的转化率分别达到99%和94.9%,对CO_(x)和N_(2)的选择性分别为88%和96.4%,XRD和SEM-EDS-Mapping结果表明,改性组分(Cu/Fe/Mo)均匀分散在钒基整体式催化剂表面,Fe改性材料具有最大的比表面积和孔容,因而可提高甲苯和NO的同步脱除性能.

关键词：燃煤烟气整体式催化剂催化氧化甲苯一氧化氮同步去除

表观遗传修饰因子作为胰腺癌早期诊断与预后评估标志物的研究进展

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分子诊断与治疗杂志 2024年第12期16卷 2211-2214页

作者：王一然艾子译司文喆北京大学第三医院检验科北京100091

胰腺癌是一种恶性程度极高,预后极差的消化系统肿瘤,寻找灵敏、特异的肿瘤标志物应用于胰腺癌早期诊断及预后评估可以提高生存率。许多前沿性研究表明,从表观遗传调控的角度将更有助于胰腺癌早期诊断标志物的开发,潜在的表观遗传修饰标... 详细信息

胰腺癌是一种恶性程度极高,预后极差的消化系统肿瘤,寻找灵敏、特异的肿瘤标志物应用于胰腺癌早期诊断及预后评估可以提高生存率。许多前沿性研究表明,从表观遗传调控的角度将更有助于胰腺癌早期诊断标志物的开发,潜在的表观遗传修饰标志物包括DNA甲基化、组蛋白修饰、非编码RNA等,本文对近年来基于胰腺癌组织及对“液体活检”样本中的游离循环DNA及外泌体中的表观遗传修饰标志物在早期诊断和预后评估中的优势、局限性和应用前景进行综述。

关键词：胰腺癌早期诊断预后评估表观遗传修饰标志物

一例PHKA2基因半合子变异所致糖原累积症Ⅸa患儿的遗传学分析

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中华医学遗传学杂志 2022年第9期39卷 988-991页

作者：赵干业司文喆赵学潮刘莉娜王聪慧孔祥东郑州大学第一附属医院妇产医学部遗传与产前诊断中心郑州450052 北京大学第三医院检验科北京100191

目的探讨一例糖原累积症患儿的遗传学病因并进行鉴别诊断。方法收集患儿及其父母的临床资料。通过高通量测序对患者糖原累积症相关基因进行变异位点筛查并Sanger测序验证,生物信息学方法对其致病性进行预测。结果高通量测序结果显示PHKA... 详细信息

目的探讨一例糖原累积症患儿的遗传学病因并进行鉴别诊断。方法收集患儿及其父母的临床资料。通过高通量测序对患者糖原累积症相关基因进行变异位点筛查并Sanger测序验证,生物信息学方法对其致病性进行预测。结果高通量测序结果显示PHKA2基因(NM_000292)存在c.749C>T(p.S250L)半合子变异,Sanger测序验证其遗传自母亲。该变异尚未报道,经生物信息学分析为致病性变异。结论患儿为PHKA2基因c.749C>T(p.S250L)半合子变异引起的糖原累积症Ⅸa型患者,其母亲为携带者;本研究发现PHKA2基因的一个新变异,拓宽了其致病变异谱;高通量测序利于糖原累积症Ⅸa的早期准确鉴别诊断。

关键词： PHKA2基因糖原累积症Ⅸa 高通量测序鉴别诊断

血清DNMT1与TET1表达水平在肺癌早期诊断中的临床价值

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临床与病理杂志 2023年第1期43卷 1-8页

作者：叶尔那尔·哈再斯汗刘旭骏司文喆北京大学第三医院检验科北京100191 北京大学第一医院检验科北京100034

目的:检测不同类型肺癌患者与健康人血清中DNA甲基化酶1(DNA methylase 1,DNMT1)和甲基胞嘧啶双加氧酶(ten-eleven translocation methylcytosine dioxygenase 1,TET1)的表达水平,探讨2种酶对肺癌早期诊断的临床意义。方法:选取170例初... 详细信息

目的:检测不同类型肺癌患者与健康人血清中DNA甲基化酶1(DNA methylase 1,DNMT1)和甲基胞嘧啶双加氧酶(ten-eleven translocation methylcytosine dioxygenase 1,TET1)的表达水平,探讨2种酶对肺癌早期诊断的临床意义。方法:选取170例初诊为肺癌的患者血清与90例体检中心健康成年人血清,采用酶联免疫吸附试验(enzyme-linked immunoadsordent assay,ELISA)检测血清中DNMT1与TET1的表达水平。使用SPSS 26.0与Medcalc软件进行统计分析,比较健康成年人与肺癌患者血清中DNMT1与TET1表达水平的差异;比较血清DNMT1和TET1表达水平在不同临床分期、不同类型肺癌、不同性别、不同年龄段、不同吸烟史、不同癌症家族史之间的差异。结果:肺癌患者血清中的DNMT1显著高于健康成年人,而TET1的表达水平低于健康成年人,差异均有统计学意义(均P<0.05)。两种酶在肺癌患者血清中的表达水平与肺癌患者的临床病理分期有关。此外,DNMT1与TET1表达水平与不同类型肺癌的分类有关。结论:DNMT1与TET1有作为肺癌早期诊断标志物的潜在价值。

关键词： DNA甲基化酶1 甲基胞嘧啶双加氧酶肺癌血清肿瘤标志物