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Electrochemical reaction mechanism of porous Zn_(2)Ti_(3)O_(8)as a high-performance pseudocapacitive anode for Li-ion batteries

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Chinese Chemical Letters 2022年第11期33卷 4776-4780页

作者： Weijie cheng Qi Feng Zhanglin Guo guanjun chen Yong Wang Lixiong Yin Jiayin Li Xingang Kong School of Materials Science and Engineering Shaanxi University of Science and TechnologyXi'an 710021China Graduate School of Engineering Toin University of YokohamaKanagawa 225-8503Japan Department of Advanced Materials Science Faculty of EngineeringKagawa University2217-20 Hayashi-choTakamatsu-shi 761-0396Japan

Zn_(2)Ti_(3)O_(8),as a new type of anode material for lithium-ion batteries,is attracting enormous attention because of its low cost and excellent *** decent capacities have been reported,the electrochemical reaction mechanism of Zn_(2)Ti_(3)O_(8)has rarely been *** this work,a porous Zn_(2)Ti_(3)O_(8)anode with considerably high capacity(421 mAh/g at 100 mA/g and 209 mAh/g at 5000 mA/g after 1500 cycles)was reported,which is even higher than ever reported titanium-based anodes materials including Li_(4)Ti_(5)O_(12),TiO_(2)and Li_(2)ZnTi_(3)O_(8).Here,for the first time,the accurate theoretical capacity of Zn_(2)Ti_(3)O_(8)was confirmed to be 266.4 mAh/*** was also found that both intercalation reaction and pseudocapacitance contribute to the actual capacity of Zn_(2)Ti_(3)O_(8),making it possibly higher than the theoretical *** importantly,the porous structure of Zn_(2)Ti_(3)O_(8)not only promotes the intercalation reaction,but also induces high pseudocapacitance capacity(225.4 mAh/g),which boosts the reversible ***,it is the outstanding pseudocapacitance capacity of porous Zn_(2)Ti_(3)O_(8)that accounts for high actual capacity exceeding the theoretical *** work elucidates the superiorities of porous structure and provides an example in designing high-performance electrodes for lithium-ion batteries.

关键词： Zn_(2)Ti_(3)O_(8) Lithium-ion battery Electrochemical reaction mechanism Theoretical capacity Pseudocapacitance

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Isolation and diversity analysis of heterotrophic bacteria associated with sea anemones

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Acta Oceanologica Sinica 2010年第2期29卷 62-69页

作者： DU Zongjun ZHANG Wanyi XIA Hongjie LU Guoqiang chen guanjun State Key Laboratory of Microbial Technology Shandong University Jinan 250100 China College of Marine Science Shandong University at Weihai Weihai 264209 China

A study was undertaken to investigate the heterotrophic bacterial flora associated with the sea anemones. Samples of the sea anemones Anthopleura midori were collected from the coast of Weihai and bacteria were isolated from these samples. Additionally, high numbers of viable bacteria were obtained from the celom wall and surface of anemone, the community of cultivable bacteria was very diverse. As a result of this isolation, 60 strains were obtained, 56 of them were selected for identification and characterization by 16S rRNA gene sequence analysis and limited phenotypic testing. Among these isolates, 16 strains were phylogenetically related to members of the genus Pseudoalteromonas and neighboring taxa. Other isolates included members of the genera Colwcllia, Vibrio, Acinetobactcr, Pseudomonas, Endozoicomonas, Roseovarius, Paraeoceus, Loktanella, Leisingcra, Sulfitobacter, Bacillus, Staphylococcus, Plantibacter, Microbaeterium, Micro- coccus, Joostella, Psychroserpens, Cellulophaga, Krokinobaeter, Polaribacter and Psychrobaeter. Seven potential novel species were found. Among 60 strains, 17 of them can produce proteolytic exoenzyme, 20 can produce lipolytic exoenzyme. Strain NQ8 has strong antagonistic effects on some Vibrio strains. This study demonstrates that the culturable fraction of bacteria from the sea anemones Anthopleura midori is diverse and appears to possess much potential as a source for the discovery of novel bioactive materials.

关键词： Anthopleura midori Bacterial diversity 16S rRNA gene Phylogeny Identification

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Identification of a marine agarolytic bacterium Agarivorans albus QM38 and cloning and sequencing its beta-agarase genes

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Acta Oceanologica Sinica 2011年第1期30卷 118-124页

作者： DU Zongjun WANG Jing YANG Lijun chen guanjun State Key Laboratory of Microbial Technology College of Life Science Shandong UniversityJinan 250100 China College of Marine Science Shandong University at Weihai Weihai 264209 China Weihai Entry-Exit Inspection and Quarantine Bureau Weihai 264200 China

A total of 117 agar-decomposing cultures were isolated from coastal seawater around Qingdao, China. The phenotypic and agarolytic features of an agarolytic isolate, QM38, were investigated. The strain was gram negative, strictly aerobic, curved rod and polar flagellum. On the basis of several phenotypic characters, biochemical and morphological characters and phylogenetic analysis of the gene coding for the 16S rRNA, the strain was identified as Agarivorans albus strain QM38. This strain can liquefy the agar on the solid agar plate. An excellular agarase activity was determined in liquid culture. The enzyme exhibited maximal activity at 40 ℃, pH 7.6. Its activity was greatly affected by different concentrations of agarose. The highest activity 32 U/ml was achieved in the culture supernatant. The hydrolytic product was analyzed by fluorophore-assisted carbohydrate electrophoresis （FACE）. After complete hydrolysis of agarose, a series of agaro-oligosaccharides were produced. The main products of the enzymes were oligosaccharides in the degree of polymerization （DP） of 2, 4, 6 and 8. Three genes agaD01, agaD02 and agaD03, encodingβ-agarases, had been cloned from genomic DNA of Agarivorans albus strain QM38. The open reading frame of agaDOl, consisted of 2 988 bp, and shared 95.5%-98.9% identity to the β-agarase genes of some strains of Vibrio and Agarivorans. Gene agaD02 comprised 2 868 bp and encoded a 955- amino-acid protein. It showed 97.4% and 98.7~0 identity to the β-agarase genes of strain Vibrio sp. PO-303 and strain Vibrio sp. JT0107, respectively. Only partial sequence of agaD03 gene has been cloned. It showed 96.5% identity to β-agarase gene （agaB） of Pseudoalteromonas sp. CY24, and shared 96.8% identity to β-agarase-c gene of Vibrio sp. PO-303.

关键词： marine bacteria isolation and characterization agarase gene cloning Agarivoransalbus

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Prenatal Environmental Antibiotic Exposure and Autism Spectrum Disorder Symptoms in Children at 3 Years of Age:Findings from the Ma’anshan Birth Cohort Study

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Environment & Health 2024年第9期2卷 651-660页

作者： Baolin Wang Feifei Han Peng Ding Juan Tong Kaiyong Liu Shuangqin Yan Sheng Wang guanjun chen Xiaoyan Wu Kun Huang Menglong Geng Fangbiao Tao School of Public Health Anhui Medical UniversityHefei 230032 AnhuiChina Key Laboratory of Population Health Across Life Cycle(Anhui Medical University) Ministry of Education of the People’s Republic of ChinaHefei 230032 AnhuiChina NHC Key Laboratory of Study on Abnormal Gametes and Reproductive Tract(Anhui Medical University) Hefei 230032 AnhuiChina Anhui Provincial Key Laboratory of Environment and Population Health across the Life Course Anhui Medical UniversityHefei 230032 AnhuiChina Ma’anshan Maternal and Child Healthcare(MCH)Center Ma’anshan 243011China The Center for Scientific Research of Anhui Medical University Anhui Medical UniversityHefei 230032 AnhuiChina

ABSTRACT:Antibiotic exposure during pregnancy may affect the neurodevelopment of children,but biomonitoring-based population studies on this class of new pollutants are *** conducted a prospective birth cohort study of 2860 mother−child pairs,measured the urinary concentrations of 41 antibiotics and their two metabolites over three trimesters,and assessed children’s autism spectrum disorder(ASD)symptoms at 3 years of *** examined the associations between prenatal antibiotic exposure and children’s ASD *** least absolute shrinkage and selection operator regression screened for Tetracycline and Ofloxacin as important predictors of ASD *** Poisson regression models revealed that maternal Tetracycline exposure throughout pregnancy increased the risk of ASD symptoms(RR:1.66,95%CI:1.14,2.40).Maternal Tetracycline exposure during the first(RR:1.74,95%CI:1.13,2.68)and third trimesters(RR:1.86,95%CI:1.16,3.00)increased the risk of ASD symptoms in boys,and Ofloxacin exposure during the first trimester(RR:1.47,95%CI:1.07,2.02)increased the risk of ASD symptoms in *** dose-dependent relationships between prenatal antibiotic exposure and ASD symptoms were validated by restricted cubic *** exposure to Tetracycline and Ofloxacin may increase the risk of ASD symptoms in children,and the first and third trimesters might be the key windows.

关键词： Antibiotics Biomonitoring Urine biomarkers Prenatal exposure Autism Birth cohort

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简谈轧钢加热炉问题及节能

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冶金能源 2008年第6期27卷 32-35页

作者：陈冠军首钢技术研究院

通过对首钢各厂轧钢加热炉现状调查、热平衡测试和指标监测,分析出了目前轧钢加热炉使用与运行过程存在的问题。针对这些问题,提出轧钢加热炉节能改进的对策,通过实施这些对策,可以进一步降低轧钢加热炉能耗并延长其寿命。

关键词：加热炉节能轧钢

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迁钢2号高炉热风炉系统高风温技术研究

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炼铁 2008年第6期27卷 10-13页

作者：陈冠军首钢技术研究院

针对使用单一高炉煤气实现热风炉1250℃以上的风温问题,比较分析国外内各项空煤气预热技术,认为迁钢2号高炉采用高温预热炉和分离式热管换热器等技术相结合工艺方法实现高风温是较佳方案。为此,利用仿真、试验等手段,系统研究了预热热... 详细信息

针对使用单一高炉煤气实现热风炉1250℃以上的风温问题,比较分析国外内各项空煤气预热技术,认为迁钢2号高炉采用高温预热炉和分离式热管换热器等技术相结合工艺方法实现高风温是较佳方案。为此,利用仿真、试验等手段,系统研究了预热热风炉、霍戈文热风炉和混风炉等关键设备的炉内流场、温度场等分布的均匀性问题。研究结果表明,预热热风炉具有炉顶、炉墙温度低、燃烧完全等优点,能满足高风温热风炉系统使用要求,但中心存在回流问题;霍戈文热风炉流场均匀,但存在偏流,燃烧不完全问题;设计简单的混风炉和改进的高风温管道,均能满足使用要求。通过烟气残氧、CO浓度测试表明,预热炉和霍戈文热风炉的燃烧状况与仿真基本一致。投产应用表明,迁钢热风炉系统实现了高风温,降低高炉焦比、煤比,实现了高炉工序的节能。

关键词：热风炉高风温燃烧仿真

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首钢高炉高风温技术的应用及存在的问题

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炼铁 2019年第4期38卷 16-18页

作者：陈冠军首钢集团有限公司技术研究院

对首钢高炉高风温技术应用情况及存在的问题进行了阐述。首钢通过引进国际先进的卡卢金顶燃式和霍戈文内燃式热风炉,采用全烧高炉煤气高温空气燃烧预热技术工艺流程,高炉实现了高风温,降低了焦比。在高风温使用过程中,因出现的热风炉格... 详细信息

对首钢高炉高风温技术应用情况及存在的问题进行了阐述。首钢通过引进国际先进的卡卢金顶燃式和霍戈文内燃式热风炉,采用全烧高炉煤气高温空气燃烧预热技术工艺流程,高炉实现了高风温,降低了焦比。在高风温使用过程中,因出现的热风炉格子砖烧裂、管道腐蚀和炉壳开裂等问题导致风温下降,通过采用修复热风炉格子砖或燃烧器、控制最高拱顶温度、炉壳管道表面红外温度监控,以及稳定风温等方法,保证了高炉高风温的使用。

关键词：高炉热风炉高风温预热技术拱顶温度

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Rational design of surface charged residues on the enzyme performance of GH11 family xylanase

Rational design of surface charged residues on the enzyme pe...

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第十二届中国酶工程学术研讨会

作者： Xiuyun Wu Qun Zhang Shijia Liu Lanzeng Zhang guanjun chen Lushan Wang State Key Laboratory of Microbial Technology Institute of Microbial Technology Shandong University Taishan College Shandong University

＜正＞The xylanase has important application value in the fields of food processing,sewage treatment,pulp bleaching and so *** and alkaliphilic enzymes would obviously be beneficial in processes where extreme pH condi...

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适用于RAC框架结构的地震动强度指标研究

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振动．测试与诊断 2022年第6期42卷 1084-1091,1241页

作者：侯红梅刘文锋陈冠君青岛理工大学土木工程学院青岛266033 滨州学院建筑工程学院滨州256600

再生混凝土结构的合理地震动强度指标是预测和评价其抗震响应的映射判据。基于3种层数和5种再生骨料取代率的15个结构模型,选取120条地震动记录进行时程分析,综合考虑结构高度、再生骨料取代率、地震动震源机制和是否脉冲型地震动等因... 详细信息

再生混凝土结构的合理地震动强度指标是预测和评价其抗震响应的映射判据。基于3种层数和5种再生骨料取代率的15个结构模型,选取120条地震动记录进行时程分析,综合考虑结构高度、再生骨料取代率、地震动震源机制和是否脉冲型地震动等因素的影响,评估了28个地震动强度指标与4个关键工程需求参数的相关性、有效性和充分性。研究表明:谱强度指标与工程需求参数之间具有较强的相关性;基于结构高度和再生骨料取代率的变化,不同地震动强度指标与工程需求参数相关性存在明显差异,谱速度是与4个工程需求参数综合相关性最强的地震动强度指标;再生骨料取代率、震源机制和是否脉冲型地震动都会影响相关性系数;谱强度指标表征工程需求参数具有良好的有效性和充分性。

关键词：再生混凝土框架结构地震动强度指标工程需求参数相关性有效性充分性

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基于低频振荡特征的夏季江淮持续性降水延伸期预报方法

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大气科学 2012年第3期36卷 633-644页

作者：陈官军魏凤英中国气象科学研究院灾害天气国家重点实验室中国科学院研究生院中国人民解放军96164部队58分队

本文利用1981～2008年我国南方地区200站逐日降水量、NCEP再分析资料和NCEP气候预报系统(CFS)的模式回算数据,针对降水低频信号,分析了江淮地区夏季降水的延伸期可预报性,并选取对江淮持续性强降水有显著影响的东亚环流指数作为预报因子... 详细信息

本文利用1981～2008年我国南方地区200站逐日降水量、NCEP再分析资料和NCEP气候预报系统(CFS)的模式回算数据,针对降水低频信号,分析了江淮地区夏季降水的延伸期可预报性,并选取对江淮持续性强降水有显著影响的东亚环流指数作为预报因子,以降水20～50天低频分量作为预报量,进行了针对江淮地区夏季持续性强降水过程的延伸期预报试验。结果表明,江淮地区夏季降水具有明显的20～50天周期的低频振荡特征。降水的20～50天低频振荡,尤其是峰谷值位相的变化与实际降水集中期和中断期的交替有较好的关系,研究20～50天降水低频分量的延伸预报,对于江淮地区夏季持续性强降水过程的延伸预报有一定的指示意义。本文尝试提出一种基于大气环流低频信号和数值模式预报产品的动力与统计相结合的预报方法,以期为江淮地区夏季持续性降水过程的延伸期预报提供参考。

关键词：持续性强降水过程延伸预报低频振荡气候预报系统预报方法

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