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Chinese Journal of Chemical Engineering 2021年第11期34卷 269-276页

作者： Chengyi Ai Tingting Li Rongzheng Ren zhenhua wang wang Sun Jinsheng Feng Kening Sun Jinshuo Qiao Beijing Key Laboratory for Chemical Power Source and Green Catalysis School of Chemistry and Chemical EngineeringBeijing Institute of TechnologyBeijing 100081China

Proton conducting solid oxide fuel cell(H-SOFC)is an emerging energy conversion device,with lower activation energy and higher energy utilization ***,the deficiency of highly active cathode materials still remains a major challenge for the development of ***,in this work,K_(2)NiF_(4)-type cathode materials Pr_(2-x)Ba_(x)Ni_(0.6)Cu_(0.4)O_(4+δ)(x=0,0.1,0.2,0.3),single-phase tripleconducting(e-/O^(2-)/H^(+))oxides,are prepared for intermediate temperature H-SOFCs and exhibit good oxygen reduction reaction *** investigation demonstrates that doping Ba into Pr_(2-x)BaxNi_(0.6)Cu_(0.4)O_(4+δ) can increase its electrochemical performance through enhancing electrical conductivity,oxygen vacancy concentration and proton *** tests are carried at 750℃ and the minimum polarization impedances are obtained when x=0.2,which are 0.068 Ω·cm^(2) in air and 1.336 Ω·cm^(2) in wet argon,*** peak power density of the cell with Pr_(1.8)Ba_(0.2)Ni_(0.6)Cu_(0.4)O_(4+δ) cathode is 298 mW·cm^(-2) at 750℃ in air with humidified hydrogen as *** on the above results,Ba-doped Pr_(2-x)Ba_(x)Ni_(0.6)Cu_(0.4)O_(4+δ) can be a good candidate material for SOFC cathode applications.

关键词： Protonic conducting solid oxide fuel cells Cathode materials Element substitution

大规模筏式贻贝养殖区浮游植物群落结构昼夜变化特征

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上海海洋大学学报 2024年第5期33卷 1211-1222页

作者：吴晓凡汪振华章守宇林军钟威李晶晶毛嘉烜上海海洋大学海洋科学与生态环境学院上海201306 上海海洋大学海洋牧场工程技术研究中心上海201306

于2023年9月对枸杞岛筏式贻贝养殖区内外共6个站点的浮游植物进行了昼夜连续采样,采用丰度和多样性指数及多元统计方法对养殖区内外浮游植物群落的昼夜变化特征进行了分析。结果显示:养殖区共采集浮游植物7门158种(区内为103种,区外为98... 详细信息

于2023年9月对枸杞岛筏式贻贝养殖区内外共6个站点的浮游植物进行了昼夜连续采样,采用丰度和多样性指数及多元统计方法对养殖区内外浮游植物群落的昼夜变化特征进行了分析。结果显示:养殖区共采集浮游植物7门158种(区内为103种,区外为98种),其中硅藻门104种,占比65.82%,甲藻门30种,占比18.99%,其余门类占15.19%;区内白昼采集浮游植物94种,夜晚103种;对应区外为93种和98种。养殖区浮游植物优势种为9种,区外12种,其中中肋骨条藻(Skeletonema costatum)和夜光藻(Noctiluca scintillans)为区内外全天优势种。养殖区内浮游植物平均丰度为白昼(1.77×10^(7)±2.5×10^(6))cells/L,夜晚(1.64×10^(7)±2.31×10^(6))cells/L,对应区外分别为(1.87×10^(7)±3.36×10^(6))cells/L和(1.75×10^(7)±2.72×10^(6))cells/L。区内丰度变化呈多峰型,峰值出现在潮水涨、退至4分和涨平时分;区外丰度变化呈单峰型,且与潮汐变化紧密相关,峰值仅出现在涨平时分。nMDS分析显示养殖区内浮游植物群落昼夜差异不显著(P>0.05),而区外浮游植物群落存在显著昼夜差异(P<0.05),且与潮汐变化极显著相关(P<0.01)。温度、溶解氧和盐度与区内外浮游植物种类数和丰度皆显著相关(P<0.05),浮游植物的种类数与磷酸盐和硝酸盐皆呈显著负相关(P<0.05),丰度与氨氮和硅酸盐呈显著正相关(P<0.05)。研究表明,大规模筏式养殖对局部水域浮游植物群落的影响在赤潮生物聚集的阶段可呈现更为积极的结果。

关键词：枸杞岛贻贝养殖筏式养殖浮游植物昼夜变化

Enhanced linear magneto-resistance near the Dirac point in topological insulator Bi2(Te1−xSex)3 nanowires

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Nano Research 2020年第5期13卷 1332-1338页

作者： LingNan Wei zhenhua wang ZhiDong Zhang Chieh-Wen Liu Xuan P.A.Gao Shenyang National Laboratory for Materials Science Institute of Metal ResearchChinese Academy of Sciences72 Wenhua RoadShenyang 110016China School of Materials Science and Engineering University of Science and Technology of ChinaHefei 230026China Department of Physics Case Western Reserve UniversityClevelandOhio 44106USA

We report the composition and back-gate voltage tuned transport properties of ternary compound Bi2(Te1−xSex)3 nanowires synthesized by chemical vapor deposition(CVD).It is found that the population of bulk carriers can be suppressed effectively with increasing the Se concentration *** Bi2(Te1−xSex)3 nanowires with x=25%±5%,the ambipolar surface conduction associated with tuning the Fermi energy across the Dirac point of topological surface states is induced by applying a back-gate ***,we find that while the magnetoresistance(MR)follows the weak antilocalization(WAL)behavior when the Fermi level is tuned away from the Dirac point,MR is enhanced in magnitude and turns more linear in the whole magnetic field range(between±9 T)near the Dirac *** observation of the enhanced linear magneto-resistance(LMR)and crossover from WAL to LMR,near the Dirac point provides a deeper insight into understanding the nature of topological insulator’s surface transport and the relation between these two widely observed magneto-transport phenomena.

关键词： Topological insulator nanowire ambipolar conduction bismuth selenide bismuth telluride linear magneto-resistance weak anti-localization

Effects of biodegradable mulch on soil water and heat conditions,yield and quality of processing tomatoes by drip irrigation

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Journal of Arid Land 2020年第5期12卷 819-836页

作者： JIA Hao wang zhenhua ZHANG Jinzhu LI Wenhao REN Zuoli JIA Zhecheng wang Qin College of Water&Architectural Engineering Shihezi UniversityShihezi 832000China Key Laboratory of Modern Water-Saving Irrigation of Xinjiang Production&Construction Group Shihezi UniversityShihezi 832000China

To combat the problem of residual film pollution and ensure the sustainable development of agriculture in oasis areas,a field experiment was carried out in 2019 at the Wuyi Farm Corps Irrigation Center Test Station in Urumqi,Northwest *** types of biodegradable mulches,traditional plastic mulchs and a control group(bare land;referred to as CK)were compared,including a total of six different *** of mulching on soil water and heat conditions as well as the yield and quality of processing tomatoes under drip irrigation were *** addition,a comparative analysis of economic benefits of biodegradable mulches was *** component analysis and gray correlation analysis were used to evaluate suitable mulching varieties for planting processing tomatoes under drip *** results show that,compared with CK,biodegradable mulches and traditional plastic mulch have a similar effect on retaining soil moisture at the seedling stage but significantly increase soil moisture by 0.5%-1.5%and 1.5%-3.0%in the middle and late growth periods(P<0.050),*** difference in the thermal insulation effect between biodegradable mulch and plastic mulch gradually reduces as the crop *** with plastic mulch,the average soil temperature at 5-20 cm depth under biodegradable mulches is significantly lowered by 2.04°C-3.52°C and 0.52°C-0.88°C(P<0.050)at the seedling stage and the full growth period,respectively,and the water use efficiency,average fruit yield,and production-investment ratio under biodegradable mulches were reduced by 0.89%-6.63%,3.39%-8.69%,and 0.51%-6.33%(P<0.050),*** comprehensive evaluation analysis suggests that the black oxidized biological double-degradation ecological mulch made from eco-benign plastic is the optimal film type under the study ***,from the perspective of sustainable development,biodegradable mulch is a competitive alternative to plastic mulch for large-scale tomato p

关键词： biodegradable plastic mulch processing tomato water use efficiency soil water and heat comprehensive evaluation regional agricultural sustainability Xinjiang

立体脑电图电极置入在药物难治性局灶性癫痫术前评估中的应用价值

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中华神经外科杂志 2024年第2期40卷 137-142页

作者：郭效东路小奇刘明辉王振华许鹏杨新超郝文明娄云霄李经纶王本瀚解放军联勤保障部队第988医院全军神经外科中心郑州450042

目的探讨立体脑电图(SEEG)电极置入在药物难治性局灶性癫痫术前评估中的应用价值.方法回顾性分析2018年1月至2022年12月解放军联勤保障部队第988医院全军神经外科中心应用少量SEEG电极置入技术评估24例药物难治性局灶性癫痫患者的临... 详细信息

目的探讨立体脑电图(SEEG)电极置入在药物难治性局灶性癫痫术前评估中的应用价值.方法回顾性分析2018年1月至2022年12月解放军联勤保障部队第988医院全军神经外科中心应用少量SEEG电极置入技术评估24例药物难治性局灶性癫痫患者的临床资料,通过发作症状,发作期及发作间期视频脑电图,头颅CT、MRI、正电子发射断层显像(PET)-CT等影像学资料,依据解剖-电生理-临床表现,提出癫痫发作起源和扩散路径的核心及备用假设;将电极置入癫痫网络的相关靶点,SEEG监测判断癫痫起源区;通过皮质电刺激(ECS)诱发惯常发作验证致痫区、定位功能区后行射频热凝(RFTC)毁损治疗,仍有癫痫发作者行二期开颅手术切除致痫灶;采用Engel分级评估癫痫的控制效果.结果 24例患者共置入126根电极,每例置入(5.3±1.1)根(3~8根).单侧电极置入6例,双侧电极置入18例.24例患者的实际靶点与计划靶点误差为(1.61±0.88)mm.无一例患者补充置入电极.SEEG监测时间为(10.1±2.6)d,均捕捉到3~20次惯常发作.ECS诱发出惯常发作15例,非惯常发作5例,未诱发出发作4例.明确致痫区23例,其中颞叶、额叶各10例,枕叶3例;未能定位1例.行RFTC治疗22例,毁损后出现头痛9例、严重脑水肿致对侧上肢无力1例,无症状硬膜下血肿1例,均无颅内感染、脑脊液漏、电极折断移位等并发症发生.未行RFTC治疗2例,其中1例未能验证假设,1例致痫区与运动语言区重叠,调整抗癫痫发作药物后均好转.24例患者均获得临床随访,随访时间[M(Q1,Q3)]为12.5(10.2,26.8)个月,末次随访显示,22例行RFTC治疗的患者中,Engel分级Ⅰ级1例;Engel分级Ⅱ级21例,其中16例行二期手术切除致痫区,切除术后癫痫发作消失13例(Engel分级Ⅰ级),无改善3例(Engel分级Ⅱ级),5例拟行二次电极置入RFTC治疗.结论合理掌握适应证,采用少量SEEG电极置入可帮助判断致痫区部位,指导手术切除致痫区,且术后效果好,在药物难治性局灶性癫痫术前评估中有一定的应用价值.

关键词：耐药性癫痫致痫区立体脑电图射频热凝毁损皮质电刺激

浅埋滴灌水氮配施对冬小麦生长发育、产量及水分利用效率的影响

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新疆农业科学 2024年第5期61卷 1057-1066页

作者：谢忠叶含春王振华李海强刘健陈睿许宇双石河子大学水利建筑工程学院/现代节水灌溉兵团重点实验室/农业农村部西北绿洲节水农业重点实验室新疆石河子832000

【目的】研究滴灌带浅埋、水氮配施对冬小麦生长发育、产量及水分利用效率的影响。【方法】试验为完全区组设计,设置3个因素:覆土深度(0和5 cm)、灌水量(270、315和360 mm)、施氮量(195、255和315 kg/hm^(2))。【结果】在浅埋滴灌(5 cm)... 详细信息

【目的】研究滴灌带浅埋、水氮配施对冬小麦生长发育、产量及水分利用效率的影响。【方法】试验为完全区组设计,设置3个因素:覆土深度(0和5 cm)、灌水量(270、315和360 mm)、施氮量(195、255和315 kg/hm^(2))。【结果】在浅埋滴灌(5 cm)下,灌溉定额为315 mm、施氮量255 kg/hm^(2)时,冬小麦产量、水分利用效率及氮肥偏生产力提升最明显。浅埋滴灌使冬小麦株高和叶面积指数分别提高5.58%和16.77%,产量、水分利用效率与氮肥偏生产力分别显著提高8.32%、8.20%和8.16%。浅埋滴灌较不覆土滴灌(0 cm)处理净收益平均增收1092元/hm^(2),浅埋滴灌下灌水315 mm、施氮255 kg/hm^(2)净收益最高(10883元/hm^(2))。【结论】冬小麦较优的灌溉施肥方案为浅埋滴灌灌水315 mm,施氮255 kg/hm^(2)。

关键词：冬小麦浅埋滴灌水氮配施水分利用效率产量

Broadband photovoltaic effect of n-type topological insulator Bi2Te3 films on p-type Si substrates

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Nano Research 2017年第6期10卷 1872-1879页

作者： zhenhua wang Mingze Li Liang Yang Zhidong Zhang Xuan P. A. Gao Shenyang National Laboratory for Materials Science Institute of Metal Research Chinese Academy of Sciences 72 Wenhua Road Shenyang 110016 China School of Materials Science and Engineering University of Science and Technology of China 96 Jinzhai Road Hefei 230026 China Department of Physics Case Western Reserve University Cleveland Ohio 44106 USA

We report the photovoltaic effects of n-type topological insulator （TI） Bi2Te3 films grown on p-type Si substrates by chemical vapor deposition （CVD）. The films containing large nanoplates with a smooth surface formed on p-Si exhibit good p-n diode characteristics under dark and light illumination conditions and display a good photovoltaic effect under the broadband range from ultraviolet （UV） to near infrared （N1R） wavelengths. Under the light illumination with a wavelength of 1,000 nm, a short circuit current （Isc） of 19.2 μA and an open circuit voltage （Voc） of 235 mV are achieved. The maximum fill factor （FF） increases with a decrease in the wavelength or light density, achieving a value of 35.6% under 600 nm illumination. The photoresponse of the n-Bi2TeB/p-Si device can be effectively switched between the on and off modes in millisecond time scale. These findings are important for both the fundamental understanding and solar cell device avDlications of TI materials.

关键词： photovoltaic effect topological insulators Bi2Te3/Si film

人脐带干细胞外泌体对人毛乳头细胞增殖的影响

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实用医学杂志 2024年第20期40卷 2828-2834页

作者：罗青黄金金任婷婷周瑞华徐栋花王振华王国颖山东第二医科大学山东潍坊261053 潍坊市人民医院皮肤科山东潍坊261041 潍坊市人民医院中心实验室山东潍坊261041

目的探究人脐带间充质干细胞外泌体(hUCMSC-Exos)对人毛乳头细胞(HDPCs)增殖的影响,并对hUCMSC-Exos促毛发生长作用的机制进行初步探索。方法二步酶法分离HDPCs并进行体外培养,培养人脐带间充质干细胞(hUC-MSCs),收集细胞培养上清,通过... 详细信息

目的探究人脐带间充质干细胞外泌体(hUCMSC-Exos)对人毛乳头细胞(HDPCs)增殖的影响,并对hUCMSC-Exos促毛发生长作用的机制进行初步探索。方法二步酶法分离HDPCs并进行体外培养,培养人脐带间充质干细胞(hUC-MSCs),收集细胞培养上清,通过超高速离心法提取外泌体,并对其进行电镜、粒径及表面标记物鉴定。双氢睾酮(dihydrotestosterone,DHT)诱导HDPCs建立雄激素性脱发细胞模型。将hUCMSC-Exos与HDPCs共培养,采用细胞增殖试验(EdU)检测诱导的HDPCs的相对活力。Real-time qPCR检测碱性磷酸酶(ALP)表达水平、Western blot检测β-catenin、Wnt10b、GSK-3β在蛋白水平的表达。结果所获取的HDPCs、h UC-MSCs和hUCMSC-Exos均符合毛乳头细胞、间充质干细胞及外泌体特征。EdU阳性细胞数显著增加,外泌体可有效促进HDPCs增殖(P<0.05),增强HDPCs活力,减轻DHT造成的损伤(P<0.05)。Real-time qPCR显示外泌体可增强ALP基因表达水平(P<0.05),增强毛囊诱导能力;Western blot证实β-catenin、Wnt10b、GSK-3β在蛋白水平的表达均有差异(P<0.05)。结论hUCMSCExos可促进DHT诱导的HDPCs增殖,增强其毛囊再生修复能力,其机制可能与激活Wnt/β-catenin信号通路有关。

关键词：毛乳头细胞脐带间充质干细胞外泌体增殖再生

南方典型母质发育稻田土壤氨氧化细菌和古菌群落结构特征

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土壤 2024年第3期56卷 548-556页

作者：俎诗佩彭德元王振华刘毅秦红灵张俊忠云南省森林灾害预警与控制重点实验室西南林业大学林学院昆明650224 湖南省烟草公司张家界市公司湖南张家界427099 中国科学院亚热带农业生态研究所亚热带农业生态过程重点实验室长沙410125

依托中国科学院桃源农业生态试验站水稻土易地置土长期定位试验,以广东英利(YL,发育于玄武岩风化物)、江西鹰潭(YT,发育于第四纪红黏土)和湖南桃源古市(TYG,发育于河流冲积物)3种母质发育稻田土壤为供试土壤,采用常规土壤农化分析方法测... 详细信息

依托中国科学院桃源农业生态试验站水稻土易地置土长期定位试验,以广东英利(YL,发育于玄武岩风化物)、江西鹰潭(YT,发育于第四纪红黏土)和湖南桃源古市(TYG,发育于河流冲积物)3种母质发育稻田土壤为供试土壤,采用常规土壤农化分析方法测得3种土壤的理化性质、硝化速率,并结合实时荧光定量PCR技术和Illumina MiSeq测序技术,分析了土壤氨氧化古菌(AOA)和氨氧化细菌(AOB)种群丰度及群落结构的异同。结果表明:土壤硝化速率除分蘖期外,均表现为:YT>YL>TYG。YL与YT土壤中AOA数量占主导地位,AOA/AOB比值分别在0.72~3.05、0.98~1.52;TYG土壤中AOB数量占主导地位,AOA/AOB比值在0.21~0.75。群落组成方面,不同母质土壤间AOA、AOB群落结构差异显著,3种土壤AOA优势菌属各不相同,AOB优势菌属均为Nitrosospira。冗余分析表明,pH和可溶性有机碳是造成AOA、AOB群落结构差异的核心因子。综上,在环境背景均统一的前提下,不同母质发育稻田土壤理化性质之间依旧存在差异,这种差异影响着氨氧化微生物AOA、AOB的丰度以及群落结构。

关键词：土壤母质稻田土壤氨氧化细菌氨氧化古菌

Ultrathin two-dimensional bimetal NiCo-based MOF nanosheets as ultralight interlayer in lithium-sulfur batteries

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Chinese Chemical Letters 2023年第4期34卷 495-500页

作者： Pingli Feng Wenshuo Hou Zhe Bai Yu Bai Kening Sun zhenhua wang Beijing Key Laboratory for Chemical Power Source and Green Catalysis School of Chemistry and Chemical EngineeringBeijing Institute of TechnologyBeijing 100081China

Lithium-sulfur batteries as one of the most promising next-generation high-energy storage system, the shuttle effect, the expansion of cathode and the slow electrode redox kinetics limit its further development. Herein, we report a two-dimensional, ultrathin and ultra-light bimetal-Ni Co-organic framework as the interlayer for Li-S batteries. This kind of interlayer can effectively block polysulfides and accelerate the conversion with a thickness of only 1 μm and a load of 0.1 mg/cm^(2). Because the MOF nanosheets with a thickness of a few nanometers have a large specific surface and a large number of exposed accessible active sites. At the same time, the intrinsic activity of each site is enhanced and the catalytic performance is improved due to the synergistic effect of mixed metals and the unique coordination environment around the active sites. So, 2D NiCo MOF/CNT totally meets the requirements for the lightweight and effective interlayer. The initial discharge capacity of cell with 2D NiCo MOF/CNT interlayer can reach 1132.7 m Ah/g at 0.5 C. It remained 709.1 m Ah/g after 300 cycles, showing good cycling stability and rate performance.

关键词： Li-S battery Ultrathin and ultralight interlayer 2D materials Bimetal MOF Synergistic effect