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Magnetic polyamidoamine dendrimers for magnetic separation and sensitive determination of organochlorine pesticides from water samples by high-performance liquid chromatography

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Journal of Environmental Sciences 2021年第4期33卷 64-73页

作者： Qingxiang Zhou yalin wu Yi Sun Xueying Sheng Yayan Tong Jinghan Guo Boyao Zhou Jingyi Zhao State Key Laboratory of Heavy Oil Processing China University of Petroleum-BeijingBeijing 102249China Beijing Municipal Research Institute of Environmental Protection Beijing 100037China

Organochlorine pesticides(OCPs)have received much attention due to their *** methods to monitor their residues in the environment are ***,magnetic polyamidoamine dendrimers were prepared by co-precipitation,Michael addition,and *** magnetic polyamidoamine dendrimers demonstrated good adsorption ability for OCPs—this feature was utilized to construct a sensitive tool for monitoring OCPs in water *** proposed method provided remarkable linearity from 0.1 to 500μg/L and satisfactory limits of detection from 0.012 to 0.029μg/*** spiked recoveries of the four target analytes were 91.8%-103.5%with relative standard deviations less than 4.5%.The magnetic materials had good *** results indicated that the resulting method was an efficient,easy,rapid,economical,and eco-friendly tool for monitoring OCPs in aqueous samples.

关键词： Organochlorine pesticides Magnetic PAMAM dendrimers Fe_(3)O_(4)nanoparticles

Gas Sensor Based on Interdigitated Gate Electrode Field Effect Transistor

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稀有金属材料与工程 2006年第A03期35卷 140-142页

作者： Tong Zhang Sheng Qiang Frank Lewis Edward S.Kolesar yalin wu Xiaozhu Chi Hongquan Zhang Harbin Institute of Technology Harbin 150001 China Automobile Electronic Engineering Technology Research and Development Center Harbin 150001 China The University of Texas at Arlington Arlington T X 76019 USA Texas Christian University Fort Worth T X 76129 USA

The paper presents a new method for fabricating a gas-sensitive micro-sensor based on *** primary target agents are nitrogen dioxides (NO_2),and ***-per-billion concentration levels of these two chemicals can be *** interdigitated gate electrode field-effect transistor (IGEFET) has been coupled with a chemically-active and electron-beam evaporated copper phthaiocyanine (CuPc) thin film to implement a gas-sensitive *** sensor is excited with voltage *** and frequency-domain response were *** magnitude of the normalized difference Fourier transform is distinct distinguished.

关键词： IGEFET sensor (NO2) DIMP Fourier transform

A highly sensitive breathable fuel cell gas sensor with nanocomposite solid electrolyte

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InfoMat 2019年第2期1卷 234-241页

作者： Jing Zhang Gaopeng Jiang Timothy Cumberland Pan Xu yalin wu Stephen Delaat Aiping Yu Zhongwei Chen Department of Chemical Engineering Waterloo Institute for NanotechnologyWaterloo Institute of Sustainable EnergyUniversity of WaterlooWaterlooOntarioCanada

The present work deals with a poly(vinyl alcohol)-based membrane mixed with poly(4-styrenesulfonic acid)to be used as a proton-conducting solid-state electrolyte in an electrochemical gas sensor for the detection of alcohol.A cross-linking bonding semi-interpenetrating network is formed between the polymer backbones,providing the membrane with superior mechanical property and excellent water ***,the graphene oxide nanosheets are incorporated into the polymer fibrous backbones,creating impermeable block layers to limit ethanol gas ***,the modification of graphene oxide facilitates the protons transportation in both in-plane and through-plane channels of the membrane,boosting excellent conductivities of 0.13 S cm^−1(in-plane)and 22.6 mS cm^−1(through-plane)at 75C,*** alcohol fuel cell sensor assembled with this semi-interpenetrating network solid electrolyte membrane is fabricated based on direct ethanol fuel cell principle,exhibiting excellent sensitivity,linearity,as well as low ethanol detection limits of 25 ppm.

关键词： electrochemical gas sensor gel polymer graphene oxide proton conductivity solid electrolyte

Internal Loads and Bioavailability of Phosphorus and Nitrogen in Dianchi Lake,China

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Chinese Geographical Science 2018年第5期28卷 851-862页

作者： wu yalin HUANG Tao HUANG Changchun SHEN Yinyin LUO Yang YANG Hao YU Yanhong LI Ruixiao GAO Yan ZHANG Mingli College of Geography Science Nanjing Normal University Nanjing 210023 China Jiangsu Center for Collaborative Innovation in Geographical Information Resource Development and Application Nanjing 210023 China Jiangsu Provincial Key Laboratory of Materials Cycling and Pollution Control Nanjing 210023 China Kunming China International Research Center for Plateau Lake Yunnan Institute of Environmental Science Kunming 650200 China

Sediments have a significant influence on the cycling of nutrient elements in lake environments. In order to assess the distribution characteristics and estimate the bioavailability of phosphorus and nitrogen in Dianchi Lake, organic and inorganic phosphorus and nitrogen forms were analysed. The 210 Pb radiometric dating method was employed to study temporal changes in the phosphorus and nitrogen pools in Dianchi Lake. The result show that the total phosphorus(TP) and total nitrogen(TN) were both at high concentrations, ranging from 697.5–3210.0 mg/kg and 1263.7–7155.2 mg/kg, respectively. Inorganic phosphorus(IP) and total organic nitrogen(TON) were the main constituents, at percentages of 59%–78% and 74%–95%, respectively, in the sediments. Spatially, there was a decreasing trend in phosphorus and nitrogen contents from the south and north to the lake centre, which is related to the distribution pattern of local economic production. The burial rates of the various phosphorus and nitrogen forms increased in same spatially and over time. Particularly in the past two decades, the burial rates doubled, with that TN reached to 1.287 mg/(cm^2·yr) in 2014. As the most reactive forms, nitrate nitrogen(NO_3-N) and ammonia nitrogen(NH_4-N) were buried more rapidly in the south region, implying that the potential for releasing sedimentary nitrogen increased from north to south. Based on their concentrations and burial rates, the internal loads of phosphorus and nitrogen were analysed for the last century. A TP pool of 71597.6 t and a TN pool of 81191.7 t were estimated for Dianchi Lake. Bioavailable phosphorus and nitrogen pools were also estimated at 44468.0 t and 5429.7 t, respectively, for the last century.

关键词： sediment phosphorus nitrogen burial rate internal load bioavailability Dianchi Lake

COVID-19 and cardiovascular complications:updates of emergency medicine

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Emergency and Critical Care Medicine 2023年第3期3卷 104-114页

作者： Jianli Zhao Yaoli Xie Zhijun Meng Caihong Liu yalin wu Fuje Zhao Xinliang Ma Theodore A.Christopher Bernard J.Lopeza Yajing Wang Emergency Medicine Department Thomas Jefferson UniversityPhiladelphiaPAUSA Department of Biomedical Engineering University of Alabama at BirminghamALUSA

Coronavirus disease 2019(COVID-19),caused by severe acute respiratory syndrome coronavirus 2(SARS-CoV-2)and SARS-CoV-2 variants,has become a global pandemic resulting in significant morbidity and *** cases of COVID-19 are characterized by hypoxemia,hyperinflammation,cytokine storm in *** studies have reported an association between COVID-19 and cardiovascular disease(CVD).Patients with CVD tend to develop severe symptoms and mortality if contracted COVID-19 with further elevations of cardiac injury ***,COVID-19 itself can induce and promoted CVD development,including myocarditis,arrhythmia,acute coronary syndrome,cardiogenic shock,and venous *** the direct etiology of SARS-CoV-2–induced cardiac injury remains unknown and underinvestigated,it is suspected that it is related to myocarditis,cytokine-mediated injury,microvascular injury,and stress-related *** vaccinations having provided the most effective approach to reducing mortality overall,an adapted treatment paradigm and regular monitoring of cardiac injury biomarkers is critical for improving outcomes in vulnerable populations at risk for severe *** this review,we focus on the latest progress in clinic and research on the cardiovascular complications of COVID-19 and provide a perspective of treating cardiac complications deriving from COVID-19 in emergency medicine.

关键词： Cardiovascular disease COVID-19 Emergency Medicine SARS-CoV-2

义务教育学校布局:10年来的政策回顾与思考

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教育与经济 2011年第2期27卷 14-18页

作者：吴亚林咸宁学院教育学院湖北咸宁437100

义务教育学校布局调整是最近10年以来义务教育发展的一项重要举措,本文回顾了10年来农村义务教育学校布局调整的宏观教育政策,分析义务教育学校布局调整政策的背景、起源、进展和实施情况,探讨在新形势下义务教育学校布局调整面临的新... 详细信息

义务教育学校布局调整是最近10年以来义务教育发展的一项重要举措,本文回顾了10年来农村义务教育学校布局调整的宏观教育政策,分析义务教育学校布局调整政策的背景、起源、进展和实施情况,探讨在新形势下义务教育学校布局调整面临的新问题和新趋势,为促进城乡义务教育均衡发展提供相关政策建议。

关键词：义务教育学校布局政策思考

教师何为:由技艺而师匠——基于技艺哲学的探讨

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教育研究与实验 2023年第6期 67-77页

作者：吴亚林徐蕾湖北省人文社科重点研究基地农村教育与文化发展研究中心湖北科技学院教育学院咸宁437100

从技艺哲学视角探讨教师身份起源、职业性质与使命追求,能够阐释教师的根本特征,揭示立德树人的职业使命。技艺是人生活和做事的本领,是人从无本质到人成为本质的内在规定,古希腊技艺哲学奠定了人的本质与生命意义的思想基础。工匠是最... 详细信息

从技艺哲学视角探讨教师身份起源、职业性质与使命追求,能够阐释教师的根本特征,揭示立德树人的职业使命。技艺是人生活和做事的本领,是人从无本质到人成为本质的内在规定,古希腊技艺哲学奠定了人的本质与生命意义的思想基础。工匠是最早的教师,技艺传授就是原初的教育。西方哲学对技艺的探讨起源于教师身份与职业,正是因为智者具有迎合雅典民主政治需要的教育技艺,才使得没有公民身份的智术师成为雅典的“公民导师”。智者错把技艺当作德性引发了苏格拉底的批判,弥合技艺与德性的裂痕,追寻灵魂和智慧是苏格拉底技艺哲学主题。西方技艺哲学开辟的技艺与德性、灵魂和智慧融合的思想传统,对于教师身份、职业具有积极的启示,作为掌握人类自我完善与自我实现教育技艺的教师,其使命就是由技艺而师匠。

关键词：技艺德性师匠智慧

磁共振pH成像技术及其在中枢神经系统的应用进展

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国际医学放射学杂志 2020年第5期43卷 539-543页

作者：吴亚琳尹建忠(审校) 天津医科大学一中心临床学院天津300192 天津市第一中心医院放射科

磁共振pH成像是基于化学交换饱和转移原理的技术。在饱和脉冲下,外源性或内源性大分子的可交换基团的质子与水分子的氢质子发生化学交换。交换速率受细胞pH环境的影响,继而造成水分子信号的变化。磁共振pH成像方法包括比率法和酰胺质子... 详细信息

磁共振pH成像是基于化学交换饱和转移原理的技术。在饱和脉冲下,外源性或内源性大分子的可交换基团的质子与水分子的氢质子发生化学交换。交换速率受细胞pH环境的影响,继而造成水分子信号的变化。磁共振pH成像方法包括比率法和酰胺质子交换速率法,这些方法依据不同条件下信号与交换速率的关系来反映pH环境,并已用于研究中枢神经系统疾病。介绍磁共振pH成像方法、影响因素及其优化,并综述其在缺血性卒中、脑肿瘤及创伤等方面的应用进展。

关键词：磁共振成像 pH 化学交换饱和转移卒中脑肿瘤

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稀土永磁同步电动机的自控式变频调速

贵州大学学报（自然科学版） 2009年第5期26卷 70-73,88页

作者：吴亚麟福州职业技术学院技术工程系福建福州350108

矢量控制理论解决了交流电动机电磁转矩的有效控制,双闭环矢量控制策略提高了同步电动机变频调速系统的动态性能。介绍稀土永磁同步电动机(转子无阻尼绕组)设计和自控式变频调速,典型规格样机实测数据表明具有转矩和转速平稳、同步调速... 详细信息

矢量控制理论解决了交流电动机电磁转矩的有效控制,双闭环矢量控制策略提高了同步电动机变频调速系统的动态性能。介绍稀土永磁同步电动机(转子无阻尼绕组)设计和自控式变频调速,典型规格样机实测数据表明具有转矩和转速平稳、同步调速范围宽的优点以及工程实用性。

关键词：稀土永磁同步电动机矢量控制调速动态性能