检索结果-南通市图书馆

Journal of Environmental Sciences 2013年第12期25卷 2451-2459页

作者： Muhammad Shahid tiantian xiong Maryse Castrec-Rouelle Tibo Leveque Camille Dumat Department of Environmental Sciences COMSATS Institute of Information Technology University of Toulouse INP-ENSATAv of Agrobiopole UMR 5245 CNRS-INP-UPS EcoLab UMR 7618 BioEmco UPMC-Paris 6

In industrial areas, tree leaves contaminated by metals and metalloids could constitute a secondary source of pollutants. In the present study, water extraction kinetics of inorganic elements （IE： Pb, Zn, Cd, As, Fe and Mn）, dissolved organic carbon, pH and biological activity were studied for industrial contaminated poplar leaves. Moreover, the distribution of the IE through the size fractions of the associated top soil was measured. High quantities ofMn, Zn and As and polysaccharides were released in the solution from the strongly contaminated leaves. The kinetic of release varied with time and metal type. The solution pH decreased while dissolved organic contents increased with time after 30 days. Therefore, these contaminated leaves could constitute a source of more available organic metals and metalloids than the initial inorganic process particles. However, the distribution of the IE through the size fractions of the top soil suggested that a great part of the released IE was adsorbed, reducing in consequence their transfers and bioavailability. It＇s concluded that mobility/boioavailability and speciation of metals and metalloids released from the decomposition of polluted tree leaves depends on soil characteristics, pollutant type and litter composition, with consequences for environmental risk assessment.

关键词： metals and metalloids dissolved organic carbon litter decomposition kinetics speciation water extraction

Kinetic study of phytotoxicity induced by foliar lead uptake for vegetables exposed to fine particles and implications for sustainable urban agriculture

在线全文

学校读者我要写书评

暂无评论

Journal of Environmental Sciences 2016年第8期28卷 16-27页

作者： tiantian xiong Annabelle Austruy Antoine Pierart Muhammad Shahid Eva Schreck Stéphane Mombo Camille Dumat Université de Toulouse Institut National Polytechnique de Toulouse-Ecole Nationale Supérieure Agronomique de Toulouse (INP-ENSAT) Centre National de la Recherche Scientifique Institut Ecocitoyen Centre de Vie la Fossette RD 268 Department of Environmental Sciences COMSATS Institute of Information Technology Géosciences Environnement Toulouse (GET) Observatoire Midi Pyrénées Université de Toulouse Centre d'Etude et de Recherche Travail Organisation Pouvoir (CERTOP) UMR5044 Universite J. Jaurès - Toulouse II

At the global scale, foliar metal transfer occurs for consumed vegetables cultivated in numerous urban or industrial areas with a polluted atmosphere. However, the kinetics of metal uptake, translocation and involved phytotoxicity was never jointly studied with vegetables exposed to micronic and sub-micronic particles（PM）. Different leafy vegetables（lettuces and cabbages） cultivated in RHIZOtest？ devices were, therefore, exposed in a greenhouse for 5, 10 and 15 days to various Pb O PM doses. The kinetics of transfer and phytotoxicity was assessed in relation to lead concentration and exposure duration. A significant Pb accumulation in leaves（up to 7392 mg/kg dry weight（DW） in lettuce） with translocation to roots was observed. Lead foliar exposure resulted in significant phytotoxicity, lipid composition change, a decrease of plant shoot growth（up to 68.2% in lettuce） and net photosynthesis（up to 58% in lettuce）. The phytotoxicity results indicated plant adaptation to Pb and a higher sensitivity of lettuce in comparison with cabbage. Air quality needs, therefore, to be considered for the health and quality of vegetables grown in polluted areas, such as certain megacities（in China, Pakistan, Europe, etc.） and furthermore, to assess the health risks associated with their consumption.

关键词： Metallic particles Vegetables Foliar uptake Transfer kinetics and phytotoxicity

Ecological indicators showing the succession of macrofauna communities in Sonneratia apetala artificial mangrove wetlands on Qi'ao Island at Zhuhai, South China

在线全文

学校读者我要写书评

暂无评论

Acta Oceanologica Sinica 2014年第8期33卷 62-72页

作者： TANG Yijie FANG Zhanqiang ZHANG Zaiwang ZHONG Yanting CHEN Kang LIU Benhan FAN Junjie xiong tiantian LU Xiaosheng Department of Biology Guangdong University of Education Key Laboratory of Ecology and Environmental Science in Guangdong Higher Education College of Life SciencesSouth China Normal University

The Sonneratia apetala artificial mangroves in the intertidal zone of Da Wei Bay at Qi’ao Island of Zhu-hai, South China were chosen as the macrofauna succession plots while bare tidal flats of the same size were established as control plots in surrounding interference-free areas. Conventional change indicators of community structure, such as biomass and biodiversity, and indicators, such as exergy and specific exergy, which reflect the information change of overall communities, were used to analyze the succession of macro-fauna communities inS. apetala artificial mangroves. The similarities and differences in variation tendency of the different ecological indicators and their reflected ecological principles were compared. The results showed that from D-1 to D-1275 after plantingS. apetala, the biomass of the macrofauna communities first increased, which was then followed by an increase in the network relationship between the macrofauna communities （analysis of the Pielou evenness index and Shannon-Wiener diversity index）. The system in-formation （specific exergy） increased the slowest. Between D-1460 and D-2370 after plantingS. apetala, there was a decrease in biomass, network structure, and system information in the succession plots. After the decrease in the system information （the specific exergy）, there was a decline in the network relationships （Pielou evenness index and Shannon-Wiener diversity index）. Biomass was the last indicator to decrease. The similarities and differences among the different ecological indicators varied during the succession pro-cess, which reflected the relativity and differences among the indicators. This study suggested that, although the species diversity index can be an effective indicator of two types of changes （network structure and system information）, it was quite clear that species diversity measurement was not suitable for expressing the changes in biomass during the succession process. While exergy and specific exergy can p

关键词： ecological indicators macrofauna community succession Sonneratia apetala artificial mangroves

Histones of Neutrophil Extracellular Traps Induce CD11b Expression in Brain Pericytes Via Dectin-1 after Traumatic Brain Injury

在线全文

学校读者我要写书评

暂无评论

Neuroscience Bulletin 2022年第10期38卷 1199-1214页

作者： Yang-Wuyue Liu Jingyu Zhang Wanda Bi Mi Zhou Jiabo Li tiantian xiong Nan Yang Li Zhao Xing Chen Yuanguo Zhou Wenhui He Teng Yang Hao Wang Lunshan Xu Shuang-Shuang Dai Department of Biochemistry and Molecular Biology School of Basic MedicineArmy Medical UniversityChongqing400038China Department of Neurosurgery Daping HospitalArmy Medical UniversityChongqing400042China Molecular Biology Center State Key Laboratory of TraumaBurnand Combined InjuryDaping HospitalArmy Medical UniversityChongqing400042China Department of Pathophysiology College of High Altitude MedicineArmy Medical UniversityChongqing400038China Brigade 1 of Medical Undergraduates School of Basic MedicineArmy Medical UniversityBattalion 1Chongqing400038China

The brain pericyte is a unique and indispensable part of the blood-brain barrier(BBB),and contributes to several pathological processes in traumatic brain injury(TBI).However,the cellular and molecular mechanisms by which pericytes are regulated in the damaged brain are largely ***,we show that the formation of neutrophil extracellular traps(NETs)induces the appearance of CD11b^(+)pericytes after *** CD11b^(+)pericyte subsets are characterized by increased permeability and pro-inflammatory profiles compared to ***,histones from NETs by Dectin-1 facilitate CD11b induction in brain pericytes in PKC-c-Jun dependent manner,resulting in neuroinflammation and BBB dysfunction after *** data indicate that neutrophil-NET-pericyte and histone-Dectin-1-CD11b are possible mechanisms for the activation and dysfunction of *** NETs formation and Dectin-1 are promising means of treating TBI.

关键词： Pericyte Neutrophil TBI NET Dectin-1

分娩方式与产后住院期间和6个月内纯母乳喂养相关性的meta分析

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

中华围产医学杂志 2023年第7期26卷 533-545页

作者：连伟宁熊添添聂林涛丁娟郑州大学第一附属医院质量控制处郑州450052 郑州大学医学院临床医学系郑州450052

目的:评价分娩方式与产后住院期间和6个月内纯母乳喂养的相关性。方法:系统检索PubMed、Web of Science、Cochrane Library、EBSCO、中国生物医学文献数据库、中国知网、万方数据库、维普数据库中分娩方式与产后住院期间/6个月内纯母乳... 详细信息

目的:评价分娩方式与产后住院期间和6个月内纯母乳喂养的相关性。方法:系统检索PubMed、Web of Science、Cochrane Library、EBSCO、中国生物医学文献数据库、中国知网、万方数据库、维普数据库中分娩方式与产后住院期间/6个月内纯母乳喂养关系的观察性研究文献,检索时限均从建库至2022年10月。由2名研究者根据纳入排除标准独立筛选文献、提取资料后,根据乔安娜布里格斯研究所文献质量评价工具或纽卡斯尔-渥太华量表对纳入文献进行质量评价,并采用R 4.1.0软件进行系统评价,采用固定效应或随机效应模型进行数据合并,采用Egger检验和漏斗图判断发表偏倚。结果:最终纳入34篇文献,包括22项横断面研究和12项队列研究,共597203例产妇。22项横断面研究质量评价均为B级,11项队列研究质量评价≥7分,纳入文献质量较高。Meta分析结果显示,剖宫产产妇住院期间的纯母乳喂养可能性比经阴道分娩的产妇低(OR=0.33,95%CI:0.22~0.50,P<0.001);产后6个月内的纯母乳喂养可能性也低于经阴道分娩的产妇(OR=0.61,95%CI:0.47~0.79,P<0.001)。结论:剖宫产是产后住院期间和6个月内纯母乳喂养的不利因素。

关键词：母乳喂养接生,产科剖宫产术分娩,产道系统评价(主题) Meta分析

Diversity of organopollutant-degrading Bacteria isolated from Taklamakan desert: potential resources for bioremediation in radioactive mixed waste environments

在线全文

学校读者我要写书评

暂无评论

Diversity of organopollutant-degrading Bacteria isolated fro...

穗花杉双黄酮调节cGAS-STING信号通路对哮喘幼年大鼠气道炎症的影响

中国微生物学会微生物资源专业委员会成立大会暨第一届学术研讨会

作者： Xuesong Luo, Jian xiong, tiantian Ren,Jingyu Guo,Chengxiang Fang College of Life Sciences,Wuhan University, Wuhan 430072

Radioactive waste contained inorganic and organic contaminants that include radionuclides,heavy metals,acids/bases,and *** links between radioresistance and desiccation tolerance have been ***,radiation resistance bacteria are probable more abundant in the arid desiccation environments than other wet *** the present study,90bacterial strains with the ability to degrade some polyaromaticcompounds were *** Taklamakan *** on

关键词： Taklamakan desert radioresistance bioremediation

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

免疫学杂志 2024年第2期40卷 145-150页

作者：熊甜甜王锐谢雄邹昱琳国药葛洲坝中心医院儿科宜昌443002

目的探讨穗花杉双黄酮(AF)对哮喘幼年大鼠气道炎症的影响并初步探讨其机制。方法采用腹腔注射联合雾化吸入卵白蛋白(OVA)法诱导幼年SD大鼠建立哮喘模型,将大鼠随机分为哮喘模型(M)组、地塞米松(DXMS)组、AF低(AF L)、中(AF M)、高(AF H... 详细信息

目的探讨穗花杉双黄酮(AF)对哮喘幼年大鼠气道炎症的影响并初步探讨其机制。方法采用腹腔注射联合雾化吸入卵白蛋白(OVA)法诱导幼年SD大鼠建立哮喘模型,将大鼠随机分为哮喘模型(M)组、地塞米松(DXMS)组、AF低(AF L)、中(AF M)、高(AF H)剂量组和正常对照(CT)组。给药结束后,无创肺功能仪检测气道反应性,通过吉姆萨(Giemsa)染色分析支气管肺泡灌洗液(BALF)中炎性细胞类型并计数,使用苏木素-伊红(HE)染色评价肺组织和支气管组织病理特征,酶联免疫吸附剂实验(ELISA)检测血清炎症因子的含量,Western blot检测肺组织GMP-AMP合酶(cGAS)、干扰素基因刺激物(STING)、磷酸化-干扰素调节因子3(p-IRF3)和干扰素调节因子3(IRF3)蛋白表达。结果与CT组相比,M组幼年大鼠肺组织和支气管组织可见明显病理损伤,气道反应性、肺组织、支气管组织病理评分、BALF中炎性细胞总数及单核细胞、嗜酸性粒细胞、中性粒细胞和淋巴细胞的数量显著增加、血清炎症因子以及肺组织c GAS、STING、p-IRF3/IRF3蛋白表达显著增加(P<0.05);与M组相比,DXMS和高剂量AF治疗哮喘大鼠后肺、支气管组织病理损伤缓解,气道反应性、肺组织、支气管组织病理评分、BALF中炎性细胞总数显著降低、血清炎症因子以及肺组织c GAS、STING、p-IRF3/IRF3蛋白表达明显降低(P<0.05)。结论AF可缓解哮喘幼年大鼠的气道炎症,其可能是通过抑制cGAS-STING信号通路实现的。

关键词：哮喘幼年大鼠气道炎症穗花杉双黄酮 GMP-AMP合酶-干扰素基因刺激物信号通路

维普期刊数据库博看期刊

在线全文

学校读者我要写书评

暂无评论

语用观念下的大学英语教学

内蒙古农业大学学报（社会科学版） 2006年第3期8卷 172-174页

作者：熊天添湘潭大学外国语学院湖南湘潭411105

本文指出学生在跨文化交际中常出现语用失误的现象,从而提出了如何在大学英语教学中加强语用能力培养的策略。

关键词：跨文化交际语用失误语用能力

阿奇霉素联合沙丁胺醇治疗儿童喘息性疾病的效果

在线全文

学校读者我要写书评

暂无评论

中外医学研究 2023年第16期21卷 14-18页

作者：熊甜甜国药葛洲坝中心医院湖北宜昌443002

目的:分析阿奇霉素联合沙丁胺醇治疗儿童喘息性疾病的效果及对达峰容积比(PVR)、达峰时间比(PTR)及公斤潮气量(TVPK)水平等指标的影响。方法:收集2020年1月—2022年1月国药葛洲坝中心医院儿科收治的150例儿童喘息性疾病患儿,根据电脑数... 详细信息

目的:分析阿奇霉素联合沙丁胺醇治疗儿童喘息性疾病的效果及对达峰容积比(PVR)、达峰时间比(PTR)及公斤潮气量(TVPK)水平等指标的影响。方法:收集2020年1月—2022年1月国药葛洲坝中心医院儿科收治的150例儿童喘息性疾病患儿,根据电脑数表法随机分为两组,对照组75例予以沙丁胺醇治疗,观察组75例予以阿奇霉素联合沙丁胺醇治疗,两组均治疗7 d。比较两组临床疗效、症状缓解时间、炎症反应程度及PVR、PTR、TVPK水平。结果:治疗后,观察组总有效率为96.00%,高于对照组的86.67%,差异有统计学意义(P<0.05)。观察组喘息缓解时间、气促缓解时间、咳嗽消失时间早于对照组,住院时间短于对照组,差异有统计学意义(P<0.05)。治疗7 d后,两组C反应蛋白(CRP)、白细胞介素-4(IL-4)均低于治疗前,且观察组低于对照组,Clara细胞分泌蛋白(CCSP)均高于治疗前,且观察组高于对照组,差异有统计学意义(P<0.05)。治疗7 d后,两组PVR、PTR及TVPK均高于治疗前,且观察组均高于对照组,差异有统计学意义(P<0.05)。结论:阿奇霉素联合沙丁胺醇治疗儿童喘息性疾病有助于提升临床效果,缩短症状缓解时间,降低炎症反应程度,且促进PVR、PTR、TVPK水平进一步改善。

关键词：阿奇霉素沙丁胺醇儿童喘息性疾病临床疗效炎症反应

不同制备条件对硅酸锆超细粉体水热法合成影响的研究

同方期刊数据库博看期刊评论

在线全文

学校读者我要写书评

暂无评论

中国陶瓷 2016年第11期52卷 33-37页

作者：喻佑华熊甜甜刘建磊景德镇陶瓷大学景德镇333000

以正硅酸乙酯（TEOS）和氧氯化锆（ZrOCl_2·8H_2O）为原料,氟化锂为矿化剂,去离子水为溶剂,采用水热法制备硅酸锆粉体。研究了制备工艺中前驱体的Zr/Si摩尔比,前驱体溶液的pH值等因素对硅酸锆粉体合成的影响。并借助X射线衍射（XRD）... 详细信息

以正硅酸乙酯（TEOS）和氧氯化锆（ZrOCl_2·8H_2O）为原料,氟化锂为矿化剂,去离子水为溶剂,采用水热法制备硅酸锆粉体。研究了制备工艺中前驱体的Zr/Si摩尔比,前驱体溶液的pH值等因素对硅酸锆粉体合成的影响。并借助X射线衍射（XRD）、扫描电子显微镜（SEM）等测试手段对粉体进行表征。研究结果表明：前驱体中Zr/Si摩尔比影响着硅酸锆粉体的合成率,其最佳摩尔比为1.2∶1。前驱体溶液的pH值对硅酸锆粉体的合成有着重要的影响,pH值为9时最有利于合成硅酸锆粉体,此条件下所得粉体平均粒度大小在500~600 nm。

关键词：硅酸锆水热法矿化剂氟化锂