检索结果-南通市图书馆

An insight into aggregation kinetics of polystyrene nanoplastics interaction with metal cations

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

Chinese Chemical Letters 2022年第12期33卷 5213-5217页

作者： Yucheng Zhang Xiaotong Su Nora FYTam Xiaolan Lao meiling zhong Qihang Wu Huifang Lei Zihui Chen Zhang Li Jie Fu Key Laboratory for Water Quality and Conservation of the Pearl Stream Delta Ministry of EducationSchool of Environmental Science and EngineeringGuangzhou UniversityGuangzhou 510006China State Key Laboratory of Marine Pollution and Department of Chemistry City University of Hong KongHong KongChina School of Science and Technology Open University of Hong KongHong KongChina School of Environmental Science and Engineering Huazhong University of Science and TechnologyWuhan 430074China

Once inevitably released into the aquatic environment,polystyrene nanoplastics(PS-NPs)will present complicated environmental behaviors,of which the aggregation is a key process determining their environmental fate and *** this study,the aggregation kinetics of different sizes(30 nm and 100 nm)of PS-NPs with metal cations(Na^(+),K^(+),Ca^(2+),Mg^(2+)and Pb^(2+))at different solution pH(3,6 and 8)were *** results showed that the aggregation of PS-NPs increased with cation *** Pb^(2+)as an example,the adsorption behavior of cations onto PS-NPs was determined by transmission electron microscopy(TEM)and energy dispersive X-ray(EDX)spectroscopy,which demonstrated Pb^(2+)could be adhered onto the surface of PS-NPs with the effect of charge *** critical coagulation concentrations(CCC)of smaller PS-NPs were higher than that of larger PS-NPs for monovalent cations,whereas a different pattern is observed for divalent *** was suggested that there were other factors that DLVO theory does not consider affect the stability of NPs with different particle *** addition,it should be noted that PS-NPs had the capacity of adsorbing large amounts of heavy metal cations and carried them transport to a long distance,and the corresponding ecological risks need to further elucidate.

关键词： Polystyrene nanoplastics Lead cation Aggregation kinetics Critical coagulation concentration Size effect

A novel and visible ratiometric fluorescence determination of carbaryl based on red emissive carbon dots by a solvent-free method

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2025年第2期36卷 314-318页

作者： meiling Xu Xinyang Li Pengyuan Liu Junjun Liu Xiao Han Guodong Chai Shuangling zhong Bai Yang Liying Cui College of Resources and Environment Jilin Agricultural University State Key Laboratory of Supramolecular Structure and Materials College of Chemistry Jilin University Key Laboratory of Straw Biology and Utilization The Ministry of Education Jilin Agricultural University

In this study, a simple and effective ratiometric fluorescence method has been developed for carbaryl detection, utilizing red emissive carbon dots（R-CDs）. The underlying principle of this proposed strategy relies on the rapid hydrolysis of carbaryl under an alkaline condition and production of 1-naphthol with blue-emission at 462 nm. Furthermore, the as-synthesized R-CDs（Em. 677 nm）, serve as a reference, enhancing the visual tracking of carbaryl through the transformation of fluorescent color from red to *** concentration of carbaryl exhibits a commendable linear correlation with the ratio of fluorescence intensity, ranging from 0 to 20 μg/m L（R2= 0.9989） with a low detection limit of 0.52 ng/m L. Additionally, the described methodology can be used for the enzyme-free visual assay of carbaryl, even in the presence of other carbamate pesticides and metal ions, in tap water and lake water samples with excellent accuracy（spiked recoveries, 94%–106.1%）, high precision(relative standard deviation（RSD） ≤ 2.42),and remarkable selectivity. This fast and highly sensitive naked-eye ratiometric sensor holds immense promise for carbaryl detection in intricate environments and food safety fields.

关键词： Carbaryl detection Carbon dots Fluorescence sensor Quantum yield Visual detection

Superhydrophobic Light Alloy Materials with Corrosion-Resistant Surfaces

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Research and Application of Materials Science 2020年第1期2卷 1-11页

作者： Xiaowei XUN Rili ZHU Jiaojiao DONG Ting PAN meiling zhong Richao ZHANG Dongmian ZANG School of Materials Science and Engineering East China Jiaotong UniversityNanchang 330013P.R.China

Metals and their alloys are irreplaceable engineered materials showing great importance in our *** alloy materials(i.e.,Mg,Al,Ti,and their alloys)have tremendous application potential in the aerospace,automotive industries,and biomedical fields for they are lighter and have excellent mechanical *** corrosion of light alloys is ubiquitous and greatly restricts their *** by the natural anti-water systems,many new designs and conceptions have recently emerged to create artificial superhydrophobic surfaces with great potential for corrosion resistant of light *** review firstly introduces the concept of superhydrophobicity and strategies of producing superhydrophobic surfaces to inhibit the corrosion of light *** addition,we elaborate the durability of superhydrophobic light alloy materials for commercial and industrial applications,and present their anticorrosion mechanism in the corrosive media.

关键词： light alloys superhydrophobicity corrosion resistance mechanical durability

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

社会网络对家庭灾难性医疗支出风险的影响

金融发展研究 2020年第9期 67-74页

作者：钟美玲蒲成毅中央财经大学保险学院北京102206

本文利用2016年中国家庭追踪调查数据,考察了社会网络对我国家庭灾难性医疗支出风险的直接和间接影响。研究发现,社会网络对我国家庭灾难性医疗支出风险的直接效应显著为负,但间接影响有限。具体而言,社会网络可以通过提供情感支持,影... 详细信息

本文利用2016年中国家庭追踪调查数据,考察了社会网络对我国家庭灾难性医疗支出风险的直接和间接影响。研究发现,社会网络对我国家庭灾难性医疗支出风险的直接效应显著为负,但间接影响有限。具体而言,社会网络可以通过提供情感支持,影响人们的保健行为和生活方式,改善身心健康,降低灾难性医疗支出风险。此外,社会网络有信息共享的作用,可以降低信息的搜寻成本和甄别成本,促进人们购买商业医疗保险,但商业医疗保险对降低灾难性医疗支出风险的作用有限。社会网络和商业医疗保险对灾难性医疗支出风险的影响在我国城乡家庭存在差异,社会网络的作用在农村地区更明显,而在城镇地区,商业医疗保险会逐渐替代社会网络发挥作用,保障家庭灾难性医疗支出风险。为此,本文提出了完善医疗保障制度和推进构建良好的社会关系等政策建议。

关键词：社会网络灾难性医疗支出风险商业医疗保险中介效应模型

大跨度铁路钢箱梁斜拉桥对接式锚拉板受力及传力特性研究

在线全文

学校读者我要写书评

暂无评论

中国铁道科学 2020年第6期41卷 61-70页

作者：施洲钟美玲张晓江周凯旋西南交通大学土木工程学院四川成都610031 中铁第四勘察设计院集团有限公司桥梁设计研究院湖北武汉430063

针对新型大跨度铁路钢箱梁斜拉桥对接式锚拉板,采用仿真分析与室内足尺模型试验相结合的研究方法,研究原结构在最不利索力下的受力传力特性,并分析不同设计参数对结构受力传力的影响。结果表明:斜拉桥对接式锚拉板主要传力板件为锚筒、... 详细信息

针对新型大跨度铁路钢箱梁斜拉桥对接式锚拉板,采用仿真分析与室内足尺模型试验相结合的研究方法,研究原结构在最不利索力下的受力传力特性,并分析不同设计参数对结构受力传力的影响。结果表明:斜拉桥对接式锚拉板主要传力板件为锚筒、锚筒加劲肋和锚板;锚板与锚筒连接焊缝及锚板与腹板对接焊缝是关键传力部位;仅在锚板开孔圆弧过渡处、锚筒及其加劲肋与承压板相接处、锚板与锚筒连接焊缝端点、承压板与锚板焊缝端点存在小范围应力集中,结构整体应力水平在150 MPa以内;试验实测与理论应力结果吻合较好;随着锚筒与锚板焊缝长度缩短,焊缝应力分布曲线整体向高应力区移动,且低应力区段应力增长幅度大于高应力区段;随锚板厚度的增加,锚筒与锚板焊缝整体应力呈现显著降低的趋势,但应力降低的速率随锚板厚度增加而降低;锚拉板结构具有良好的受力传力性能。

关键词：铁路钢箱梁斜拉桥锚拉板传力特性对接焊缝模型试验

在线全文

学校读者我要写书评

暂无评论

高速铁路拱承斜拉桥拱塔线形施工控制分析

铁道工程学报 2021年第7期38卷 22-27,53页

作者：施洲钟美玲余万庆纪锋西南交通大学成都610031

研究目的:拱塔结构受力与变形复杂,施工控制则是确保成桥线形的关键。以沅江特大桥拱承斜拉桥为依托,建立全桥有限元模型,先采用试算法模拟拱塔竖转就位工况,在其基础上分析拱塔顶推和不顶推两种合龙施工方案下拱塔线形及受力结果。研... 详细信息

研究目的:拱塔结构受力与变形复杂,施工控制则是确保成桥线形的关键。以沅江特大桥拱承斜拉桥为依托,建立全桥有限元模型,先采用试算法模拟拱塔竖转就位工况,在其基础上分析拱塔顶推和不顶推两种合龙施工方案下拱塔线形及受力结果。研究结论:(1)拱塔在转体施工中过转0.00743 rad能够平衡自重的影响,两种合龙方案线形迭代后,均能实现设计线形1 mm以内误差合龙;合龙后不顶推方案拱塔弯矩及最不利应力明显大于顶推方案;(2)两种方案下拱塔制造线形与设计线形横、竖向最大偏差分别为190.38 mm、162.49 mm和-36.74 mm、36.44 mm,顶推方案下制造线形更接近设计线形;(3)不顶推及顶推方案下,拱塔最大弯矩分别为-60420 kN·m、-44452 kN·m,拱塔上、下缘最不利应力分别为-94.5 MPa、-176.0 MPa和-114.0 MPa、-148.0 MPa,顶推方案拱塔基本处于受压状态,上、下缘应力相对均匀,受力更加合理;(4)本研究结果可为后续类似拱塔的施工与控制提供参考。

关键词：拱承斜拉桥拱塔线形施工控制有限元分析线形迭代

自信自强的基础工程:新时代公民道德自信的培育

在线全文

学校读者我要写书评

暂无评论

教育学术月刊 2023年第6期 98-105页

作者：钟美玲韩桥生江西中医药大学马克思主义学院南昌330004 江西师范大学马克思主义学院南昌330022

公民道德自信是中华民族实现伟大复兴的心理基础,培育公民道德自信是中华民族自信自强的基础工程。公民道德自信是公民对本国道德文化的认同、道德现状的肯定和道德未来发展的信心,是公民发自内心的在道德层面的自我肯定与相信。公民道... 详细信息

公民道德自信是中华民族实现伟大复兴的心理基础,培育公民道德自信是中华民族自信自强的基础工程。公民道德自信是公民对本国道德文化的认同、道德现状的肯定和道德未来发展的信心,是公民发自内心的在道德层面的自我肯定与相信。公民道德自信问题是一定历史语境的产物,国家的发展历程深深地影响着公民道德自信的程度。国家综合国力的提升、人民生活水平的提高和公民文明素养的进步是新时代公民道德自信培育的最大“底气”。公民道德自信的培育是一项系统工程,需要夯实公民道德自信培育的依托资源,强化公民道德自信培育的体系支撑,构建公民道德自信培育的力量系统,完善公民道德自信培育的实践机制。

关键词：公民道德道德自信培育新时代

A randomized controlled trial of two chemotherapy regimens-paclitaxel liposome combined with platinum and paclitaxel combined with platinum in concurrent chemoradiotherapy for cervical carcinoma

在线全文

学校读者我要写书评

暂无评论

The Chinese-German Journal of Clinical Oncology 2012年第2期11卷 113-116页

作者： Siyuan Zeng Ling Li meiling zhong Wei Jiang Yun Xiao Department of Oncology Jiangxi Maternal and Child Health Hospital Nanchang 330006 China Department of Radiotherapy Jiangxi Tumor Hospital Nanchang 330029 China

Objective:The aim of the study was to compare the efficacy,side effect and influence on the survival rate of two chemotherapy regimens,paclitaxel liposome combined with platinum and paclitaxel combined with platinum,in concurrent chemoradiotherapy for cervical ***:The 162 cases with primary cervical carcinoma diagnosed between January 2008 and November 2009 in Jiangxi Maternal and Child Health Hospital(China) were enrolled in this randomized controlled ***-one cases were included in paclitaxel group and 91 in paclitaxel liposome *** the chemotherapy doses were as follows:paclitaxel liposome and paclitaxel 135 mg/m2;cisplatin 80 mg/m2 or carboplatin AUC 4-6;then repeated every 21 days for two or three *** radiotherapy was given to both groups at the same *** was evaluated according to the tumor regression six months later and follow-up was done ***:The overall response rates of paclitaxel group and paclitaxel liposome group were 90.1% and 89 % respectively(P > 0.05).The one year cumulative survival was 91.4% for paclitaxel group and 89.2% for paclitaxel liposome group(P > 0.05).The incidence rates of adverse effects such as rash,gastrointestinal toxicity,bone marrow suppression and muscle/joint pain in paclitaxel liposome group were much lower than those in paclitaxel group(P 0.05).Conclusion:Paclitaxel liposome plus platinum is a safe and effective method for staging IIa-IV cervical *** the long-term efficacy should be further observed.

关键词： cervical cancer paclitaxel liposome paclitaxel platinum concurrent chemoradiotherapy

热处理温度对钛表面微纳米分级多孔膜结构特征影响规律

在线全文

学校读者我要写书评

暂无评论

稀有金属材料与工程 2015年第6期44卷 1527-1530页

作者：王晓岚宁成云谭帼馨于鹏钟梅玲李英华南理工大学广东广州510641 广东工业大学广东广州510006

采用碱液处理医用钛表面制备出微纳米分级多孔结构膜层,通过酸处理以及不同温度热处理对微纳米分级多孔膜改性以提高其生物活性。利用SEM、EDS和XRD分析钛表面微纳米分级多孔膜的形貌、化学组成和物相组成,探讨热处理温度对钛表面微纳... 详细信息

采用碱液处理医用钛表面制备出微纳米分级多孔结构膜层,通过酸处理以及不同温度热处理对微纳米分级多孔膜改性以提高其生物活性。利用SEM、EDS和XRD分析钛表面微纳米分级多孔膜的形貌、化学组成和物相组成,探讨热处理温度对钛表面微纳米分级多孔膜结构特征的影响规律。结果表明,当热处理温度低于750℃时,样品表面的微纳米分级多孔膜层形貌特征保持不变;当热处理温度为550℃时,钛表面微纳米分级多孔膜物相主要是结晶良好的锐钛矿型二氧化钛,具有良好的生物活性。

关键词：微纳米分级多孔膜热处理碱处理钛生物活性