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Niche differentiation shapes the bacterial diversity and composition of apple

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Horticultural Plant Journal 2023年第1期9卷 35-44页

作者： Yimei Huang Xiaofen chai Xiaona Wang Beibei Gao Hui Li Zhenhai Han Xuefeng Xu Xinzhong Zhang ting Wu Yi Wang College of Horticulture China Agricultural UniversityBeijing100193China

Microorganisms play an important role in plant growth,health and ecological *** is necessary to explore the microbial community because of the significant ecological and economic value of apples(Malus x domestica).However,the related bacterial communities in different ecological habitats are not clear in the unique scion/rootstock combinations of *** this study,the Illumina Miseq platform was used to analyze the bacterial communities in different niches(bulk soil,rhizosphere soil and roots)of two scion/rootstock combinations[Fuji/Malus xiaojinensis Cheng et Jiang(Mx)and Fuji/Malus baccata(L.)Borkh.(Mb)].The relationship between the microbial community,soil properties,and plant characters was *** results showed that the diversity of the bacterial community decreased from bulk soil to rhizosphere soil and then to *** addition,at the phylum level,Proteobacteria,Actinobacteria and Acitinobacteria were dominant and had notable divergence in different ecological *** niches had remarkable effects on the diversity and composition of the bacterial community according to *** rootstock genotype had an effect on the bacterial composition but no effect on the ***,soil organic matter(SOM),alkaline hydrolyzable nitrogen(AN)were the main factor affecting the structure of bacterial community in rhizosphere soil,as shown by Pearson *** taxa in the roots were affected by starch,fructose,sucrose and *** study showed the microbial community structure in different ecological niches of different scion/rootstock combinations and provided some evidence for understanding the microbial-plant interaction of apple rootstocks.

关键词： Apple Microbial community Rootstock genotype Ecology niche

TOF–SIMS surface analysis of chemical components of size–fractioned urban aerosols in a typical heavy air pollution event in Beijing

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Journal of Environmental Sciences 2018年第7期30卷 61-76页

作者： Wenjun Li Hong Li Jinjuan Li Xueli Cheng Zhengzheng Zhang Fahe chai Hao Zhang ting Yang Pengli Duan Defeng Lu Yizhen Chen College of Resource and Environmental Engineering Guizhou University Guiyang 550025 China State Key Laboratory of Environmental Criteria and Risk Assessment Chinese Research Academy of Environmental Sciences Beijing 100012 China Collaborative Innovation Center on Atmospheric Environment and Equipment Technology Nanjing University of Information Science andTechnology Nanjing 210044 China SAE Technology Development (Dongguan) Co. Ltd. Guangdong 523087 China Environment Research Institute Shandong University Jinan 250100 China College of Earth Sciences Jilin University Changchun 130061 China Institute of Environment Science Shanxi University Shanxi 030001 China Core Tech Integrated (Beijing) Pty. Ltd. Beijing 100086 China

Size–fractioned atmospheric aerosol particles were collected during a typical heavy air pollution event in Beijing. The organic and inorganic components on the surfaces of the samples were analyzed using time–of–flight secondary ion mass spectrometry（TOF–SIMS）.The variation characteristics of the surface chemical composition and influencing factors were studied, and the possible sources of these chemical compositions were identified through principal component analysis. The results showed that inorganic components such as crustal elements and sulfate, and organic components such as aliphatic hydrocarbons and oxygen–containing organic groups were present. Some surface components, such as polycyclic aromatic hydrocarbons, heavy metals and fluorides may exert adverse effects on human health. The species and relative percentages of the chemical components varied with particle size, diurnal and pollution progress. During a heavy pollution event, the species and relative percentages of secondary components such as oxygen–containing organic groups and sulfurous compounds increased, indicating that particles aged during this event. The surface chemical composition of the aerosol particles was affected mainly by emissions from coal combustion and motor vehicles. In addition, air pollution, meteorological factors, and air mass transport also exerted a significant effect on the surface chemical composition of aerosol particles.

关键词： Atmospheric aerosol particles Air pollution event Surface chemical composition Influence factor Static Time-of-flight secondary ion mass spectrometry Beijing

钢筋桁架楼承板在钢筋混凝土框架结构中的应用

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建筑技术 2024年第8期55卷 1007-1010页

作者：丁雪董斌方婷柴晓鑫樊蓉卢园园北京建工集团有限责任公司北京100055 北京建工土木工程有限公司北京100015

钢筋桁架楼承板作为主体结构和外围护结构中常见的预制构件而被广泛应用。本研究基于徐庄高新区某工程总承包项目,研究了钢筋桁架楼承板在钢筋混凝土框架结构体系中的应用,总结了工程施工中的重难点,并提出了相应的施工措施,取得了较好... 详细信息

钢筋桁架楼承板作为主体结构和外围护结构中常见的预制构件而被广泛应用。本研究基于徐庄高新区某工程总承包项目,研究了钢筋桁架楼承板在钢筋混凝土框架结构体系中的应用,总结了工程施工中的重难点,并提出了相应的施工措施,取得了较好的社会效益和经济效益。

关键词：预制装配建筑钢筋桁架楼承板钢筋混凝土框架结构

Impairment of gastrointestinal quality of life in severely obese patients

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World Journal of Gastroenterology 2014年第22期20卷 7027-7033页

作者： Po-Jui Yu Ju-Juin Tsou Wei-Jei lee Kuo-ting lee Yi-Chih lee Department of Nursing National Taiwan University Department of Surgery Min-Sheng General Hospital Department of Surgery National Cheng-Kung University Hospiyal Department of International Business Chien Hsin University of Science and Technology

AIM: To investigate the common gastro-intestinal symptoms and quality of life in severely obese subjects.

关键词： Severe obesity Quality of life Gastro-intestinal symptoms Glycosylated hemoglobin

Bi_(2)S_(3) for Aqueous Zn Ion Battery with Enhanced Cycle Stability

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Nano-Micro Letters 2020年第1期12卷 93-101页

作者： ting Xiong Yinming Wang Bosi Yin Wen Shi Wee Siang Vincent lee Junmin Xue Department of Materials Science and Engineering National University of SingaporeSingapore 117573Singapore Centre for Advanced 2D Materials and Graphene Research Centre National University of SingaporeSingapore 117546Singapore MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage School of Chemistry and Chemical EngineeringHarbin Institute of TechnologyNo.92 West‑Da Zhi StreetHarbin 150001People’s Republic of China

Aqueous Zn ion batteries(ZIBs)are promising in energy storage due to the low cost,high safety,and material *** development of metal oxides as the cathode for ZIBs is limited by the strong electrostatic forces between O2−and Zn2+which leads to poor cyclic ***,Bi2S3 is proposed as a promising cathode material for rechargeable aqueous *** cyclic stability and fast diffusion of Zn2+is ***,the layered structure of Bi2S3 with the weak van der Waals interaction between layers offers paths for diffusion and occupancy of Zn2+.As a result,the Zn/Bi2S3 battery delivers high capacity of 161 mAh g−1 at 0.2 A g−1 and good cycling stability up to 100 cycles with ca.100%*** battery also demonstrates good cyclic performance of ca.80.3%over 2000 cycles at 1 A g−*** storage mechanism in the Bi2S3 cathode is related to the reversible Zn ion intercalation/extraction reactions and the capacitive *** work indicates that Bi2S3 shows great potential as the cathode of ZIBs with good performance and stability.

关键词： Aqueous Zn ion battery Bi_(2)S_(3) Good stability

不同栽培基质对无芒隐子草种子萌发和幼苗生长的影响

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草原与草坪 2024年第2期44卷 200-206页

作者：刘敏婷赵心笛李振华刘容路佳音柴琦兰州大学草地农业教育部工程研究中心草地农业科技学院甘肃兰州730020

【目的】无芒隐子草(Cleistogenes songorica)是一种抗旱能力较强的草种,但因其种子有休眠现象,成苗周期长,导致无芒隐子草在田间种植的出苗率和存活率不高,本研究旨在解决这一问题。【方法】采用基质栽培技术,选择来源广泛易获得的7种... 详细信息

【目的】无芒隐子草(Cleistogenes songorica)是一种抗旱能力较强的草种,但因其种子有休眠现象,成苗周期长,导致无芒隐子草在田间种植的出苗率和存活率不高,本研究旨在解决这一问题。【方法】采用基质栽培技术,选择来源广泛易获得的7种基质(泥炭、锯末、细砂、菇渣、蛭石、珍珠岩、陶粒)对无芒隐子草进行培育,并测定了各基质的理化性质以及无芒隐子草的萌发指标和生长指标。【结果】细砂、泥炭、锯末以及蛭石培育的无芒隐子草在发芽势、发芽率、发芽指数、活力指数以及苗长等指标上均优于其他3种基质,其中锯末、细砂、泥炭和蛭石培育的无芒隐子草发芽率分别比菇渣提高了6.4倍、6.3倍、5.9倍和5.8倍。【结论】通过隶属函数法对各基质进行综合评价,排序为锯末>蛭石>细砂>珍珠岩>泥炭>菇渣>陶粒,推荐使用细砂、泥炭、锯末和蛭石作为无土栽培基质培育无芒隐子草。

关键词：无芒隐子草无土栽培生长基质隶属函数法出苗

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基于模糊控制的惰化反应器温度控制

海军航空大学学报 2024年第4期39卷 507-514页

作者：郭晨阳付子祺胡万俊柴婷范菊莉航空工业上海民用航空机电系统有限公司燃油系统部上海200241 南京航空航天大学航空学院飞行器环境与生命保障工信部重点实验室江苏南京210016 四川泛华航空仪表电器有限公司质量管理部四川成都610599

为了抑制飞机耗氧型燃油惰化系统整体式反应器内飞温现象的发生,为提升工作效率,延长使用寿命,利用Modelica语言对整体式反应器建立双温度模型,开展动态仿真,并设计了逆流式冷却措施。根据反应器温度特性,制定了相对应的控制策略,建立... 详细信息

为了抑制飞机耗氧型燃油惰化系统整体式反应器内飞温现象的发生,为提升工作效率,延长使用寿命,利用Modelica语言对整体式反应器建立双温度模型,开展动态仿真,并设计了逆流式冷却措施。根据反应器温度特性,制定了相对应的控制策略,建立模糊控制器,研究了不同工况下模糊控制器在逆流式反应器温度控制上的工作特性,以及冷却管道排布对反应通道工作效率的影响。研究结果表明:模糊控制对逆流式反应器温度控制稳定性较好,有效抑制了反应器尾部的飞温现象;相比无温控管道,单侧和双侧存在温控管道时,单根反应通道的平均反应速率分别提升了1倍和10倍,添加温度控制后,反应器整体燃油蒸气转化率从10%提升至99%。隶属函数方差σ^(2)对控制效果有明显的影响,方差σ^(2)越大,控制精度越低,响应速度越快,要根据不同进口状态选取合适的σ^(2),以获得最佳控制性能。

关键词：模糊控制惰化系统燃油系统惰化反应器温度控制

High-temperature Oxidation Behavior of Zircaloy-4 and Zirlo in Steam Ambient

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Journal of Materials Science & Technology 2010年第9期26卷 827-832页

作者： Hyung Hoon Kim Jun Ho Kim Jin Young Moon Ho Seong lee Jeong Joo Kim Young Suck chai School of Materials Science and Engineering Kyungpook National University School of Mechanical Engineering Yeungnam University214-1 Dae-dongGyeongsan-si

The oxidation characteristics for Zircaloy-4 and Zirlo in the temperature range of 700-1200°C under steam supply condition were investigated by using a modified thermo-gravimetric *** specimens were oxidized for 3600 s at each temperature and then quenched in a *** oxidation rate constants were measured from the weight gains to evaluate the oxidation behavior in Zircaloy-4 and *** weight gain rates of Zirlo were lower than those of Zircaloy-4,leading to the low rate *** different oxidation behaviors between both cladding materials were considered to be due to the difference in their chemical compositions.

关键词： Zircaloy-4 Zirlo Oxidation

枢机安神汤对氯苯丙氨酸失眠大鼠神经递质和焦虑的影响

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世界中医药 2024年第2期19卷 185-190页

作者：芦玥贾跃进柴智陈燕清吴秋玲王艳张晓敏胡婷赵飞彭雪峰山西中医药大学附属医院太原030024 中国中医科学院西苑医院山西医院太原030024 山西中医药大学晋中030000

目的:研究枢机安神汤对氯苯丙氨酸(PCPA)失眠大鼠神经递质和焦虑的影响。方法:将大鼠分为对照组、模型组、中药低剂量组(8.5 g/kg)、中药中剂量组(13 g/kg)、中药高剂量组(17 g/kg)以及西药组(0.26 mg/kg),在建模后各组大鼠连续给药7 d... 详细信息

目的:研究枢机安神汤对氯苯丙氨酸(PCPA)失眠大鼠神经递质和焦虑的影响。方法:将大鼠分为对照组、模型组、中药低剂量组(8.5 g/kg)、中药中剂量组(13 g/kg)、中药高剂量组(17 g/kg)以及西药组(0.26 mg/kg),在建模后各组大鼠连续给药7 d,采用苏木精-伊红(HE)染色法观察大鼠海马组织病理改变,酶联免疫吸附试验(ELISA)检测各组大鼠海马组织中5-羟吲哚乙酸(5-HIAA)、5-羟色胺(5-HT)、去甲肾上腺素(NE)、多巴胺(DA)和血清中褪黑素(MT)的含量,蛋白质印迹法(Western Blotting)检测大鼠海马组织中乙酰胆碱酯酶(AChE)、脑源性神经营养因子(BDNF)的蛋白表达含量。结果:成功建立大鼠失眠模型,枢机安神汤能够提高大鼠体质量和睡眠时间,增加大鼠海马CA1区锥体细胞数量,增加海马组织中5-HIAA、5-HT、AChE、BDNF与血清中MT的含量,抑制海马组织中NE、DA含量。结论:枢机安神汤可改善PCPA失眠大鼠神经递质和焦虑状态,其机制与增加5-HT含量有关。另外,枢机安神汤还通过激活前额叶突触可塑性标志蛋白BDNF的表达,改善PCPA失眠大鼠的学习记忆能力。

关键词：枢机安神汤失眠神经递质焦虑乙酰胆碱酯酶脑源性神经营养因子褪黑素学习记忆能力