Results 31 to 40 of about 464,578 (166)
Gongye shui chuli, 2021 大环内酯类抗生素(MA)是国内外水环境中高频检出的微量难降解有机污染物。在水环境中通常以ng/L或μg/L的质量浓度存在。其进入人体后会造成抗生素抗体的表达，影响人体健康，是再生水安全利用的重点关注目标污染物。综述了四种常见大环内酯类抗生素的理化性质、环境风险以及其在水环境中的浓度分布情况，并对现有的大环内酯类抗生素深度处理技术及机理进行了系统的总结，分析了相关技术的处理效果、存在不足和可能的发展方向。在此基础上，从新型吸附材料、廉价氧化剂和组合工艺这三个方面对MA去除技术未来的发展趋势进行了展望 ...
李同 +5 more
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Politics &Policy, Volume 53, Issue 5, October 2025.ABSTRACT In response to calls to extend the theoretical development of the multiple streams framework (MSF), this article proposes the integration of a refined problem framing process model and its key settings into the MSF. Despite its popularity in recent decades, the MSF has not systematically addressed the role of contextual factors in the problem ...
Wenjin Chen, Naubahar Sharif, Xinyi Wang
wiley +1 more source
, 2019 利用木质素大分子与双酚A相似性,采用木质素替代双酚A制备环氧树脂可减少化石原料双酚A的使用。采用衣康酸助催化高温液态水耦合酶催化水解法提取人工林剩余物―桉木的木质素。电子扫描电镜SEM检测表明:木质素分子量颗粒分布均一,木质素含量97.6%,酚羟基含量1.48 mmol/g。利用木质素与双酚A结构相似,在碱催化下与环氧氯丙烷反应合成木质素基环氧树脂。傅立叶红外光谱检测表明,氢氧化钠催化下发生了化学反应,生成了环氧基,环氧值为0.36 mol/100g。热失重TGA分析显示:双酚A环氧树脂失重发生在314.
苗长林 +4 more
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China's Eco‐Civilisation, Climate Leviathan, and Hobbesian Energy Transition
Antipode, Volume 57, Issue 3, Page 830-861, May 2025.Abstract Scholars have hitherto tended to theorise China's ecological civilisation project either as a form of environmental authoritarianism or as a vision of eco‐socialism. This paper contributes to the conversation by conducting a textual analysis of Chinese scholarly discussions on eco‐civilisation.
David Chen
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四川大学学报. 自然科学版, 2013 针对GenBank上已公开的四环素类耐药基因tetA、tetC、tetM序列进行比对分析,设计特异性扩增引物,建立三重PCR法快速检测方法.结果表明,单重PCR和三重PCR的符合率为100%.应用本检测方法和传统药敏试验方法(药敏纸片法)对412猪、鸡源细菌的四环素耐药基因和表型同时进行检测.PCR检测实验结果显示,在412株待检细菌中,tetA、tetC、tetM的检出率分别为47.57%,38.35%和34.95%.药敏实验结果表明,待测细菌对四环素的耐药率最高,为95%;对多西环素的耐药率次之 ...
夏青青, 王红宁, 张安云
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Gongye shui chuli, 2021 采用水热法制备了负载NiAlFe层状双氢氧化物（LDHs）的硅酸镍空心球（NiSiO@NiAlFe），用于去除水中不同类型的抗生素。研究结果表明，pH为4~8时，NiSiO@NiAlFe对四环素（TC）和环丙沙星（CIP）的吸附效果较好，吸附过程更符合Freundlich模型。15℃下，NiSiO@NiAlFe对TC和CIP的最大吸附容量分别为35.7、35.3 mg/g。吸附热力学表明该吸附过程是自发吸热过程。NiSiO@NiAlFe对TC和CIP的吸附机理为静电引力和络合作用 ...
胡玉瑛 +7 more
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Social protection and resilience in protracted crises
International Social Security Review, Volume 78, Issue 2-3, Page 173-190, April-September 2025.Abstract This article critically examines perspectives on social protection’s role in strengthening resilience capacities in protracted crises – contexts where conflict and displacement persist for five years or longer. These crises shape how stakeholders navigate their mandates to provide support, while influencing how affected communities seek to ...
Carolina Holland‐Szyp, Jeremy Lind
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Zhongguo shiyan zhenduanxue, 2014 目的探讨应用四环素调控单纯疱疹病毒胸苷激酶(HSV-tk)基因在HeLa细胞内表达及抗肿瘤作用。方法将含有四环素阻遏蛋白基因的质粒载体pcDNA6/TR与含有四环素反应元件及HSV-tk基因的质粒载体pcDNA3.1-TetO2-TKI先后稳定转染HeLa细胞,给予不同浓度的四环素类似物强力霉素,应用RT-PCR检测细胞内HSV-tk基因表达,应用MTT法测定转染HSV-tk基因的HeLa细胞对不同浓度无氧鸟苷(GCV)杀伤的敏感性。结果转染两种质粒载体的HeLa细胞经不同浓度的强力霉素作用48h后 ...
王茜, 杜珍武, 马青山, 张桂珍
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World Medical &Health Policy, Volume 17, Issue 1, Page 90-107, March 2025.Abstract Clinical breast examination (CBE) screening for breast cancer in Vietnam was proved to be cost‐effective and acceptable to women. However, the outcomes of the implementation of such proposed programme are unknown. To inform the design and implementation planning of the proposed screening programme, this study investigated and analysed the ...
Tran Thu Ngan +3 more
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, 2012 用三维荧光光谱仪研究了活性污泥EPS(Extracellular polymeric substances)和四环素的相互作用.活性污泥EPS中发现2种类蛋白荧光峰A(Ex/Em=225/340)和B(Ex/Em=280/338),其荧光强度随着盐酸四环素的加入而显著降低,峰A和盐酸四环素结合生成了不发荧光的物质,而峰B和盐酸四环素结合生成的物质在Ex/Em=295/416 nm处发荧光.峰A和峰B与盐酸四环素的相互作用适合用修正后的Stern-Volmer和Hill模型拟合 ...
中国科学院新疆生态与地理研究所环境污染与生物修复实验室,新疆乌鲁木齐830011 +6 more
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