共查询到19条相似文献，搜索用时 406 毫秒
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以光引发剂二乙基二硫代氨基甲酸钠对硅胶表面进行修饰,以氨基比林为模板分子、甲基丙烯酸为单体、乙二醇二甲基丙烯酸酯为交联剂,在修饰后的硅胶表面接枝共聚制备分子印迹聚合物。利用红外光谱、电镜对聚合物进行了表征,用紫外分光光度法考察了分子印迹聚合物对氨基比林的吸附特性。结果表明,印迹聚合物对模板分子具有较高的吸附能力和选择识别能力。 相似文献
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将高分子聚合物表面功能基化,引入引发转移终止剂．以活性自由基聚合方式在高分子聚合物表面合成印迹聚合物。在紫外光引发下,加入印迹分子,功能单体,在接枝Iniferter后的高分子聚合物表面进行分子印迹聚合物接枝实验。合成的表面接枝分子对印迹分子具有亲和能力及选择性,其识别能力来自于印迹得到的识别位点。 相似文献
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蛋白质分子印迹聚合物具有高度选择吸附性，能专一性识别蛋白质模板分子．本文综述了蛋白质分子印迹聚合物的制备、选择性识别机制及其选择性吸附的影响因素，并对蛋白质分子印迹技术的应用前景进行了展望。 相似文献
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《怀化学院学报》2017,(5)
以芹菜甲素为模板分子,通过沉淀聚合法制备了芹菜甲素分子印迹聚合物(MIPs)和非分子印迹聚合物(NIPs),并通过动态吸附、静态吸附和选择性吸附实验对所制备的分子印迹聚合物的吸附性能进行了表征.结果表明,当芹菜甲素的浓度为0.1 mmol L~(-1),吸附时间为12 h时,MIPs达到吸附平衡且最大吸附量为3.561 mg g~(-1).Scatchard分析表明,在MIPs中存在高亲和性和低亲和性两种结合位点,而在NIPs中只存在一种非特异性结合位点.选择吸附实验表明,MIPs对芹菜甲素具有高选择性和良好的专一识别性能.该研究可为芹菜甲素分子印迹聚合物作为固相萃取材料分离提取中药中有效成分芹菜甲素提供了理论基础. 相似文献
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潘卫东 《连云港职业技术学院学报》2006,(4)
通过分子印迹技术,以苏丹红I为印迹分子,甲基丙烯酸为功能单体,季戊四醇三丙烯酸酯为交联剂,偶氮二异丁腈做引发剂,制备了苏丹红I分子印迹聚合物。利用静态平衡法和Scatchard分析法研究了印迹聚合物和非印迹聚合物对苏丹红I选择吸附性能。结果表明,印迹聚合物对苏丹I具有很好的特异性结合能力,为复杂样品中的苏丹红I的选择性富集及快速检测提供了一条新的途径。 相似文献
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采用分子印迹技术,以苯甲酸为模板分子,1,4-二乙烯基苯为交联剂,分别以α-甲基丙烯酸和丙烯酰胺为功能单体,合成了苯甲酸具有特异性吸附能力的两种分子印迹聚合物,其中用α-甲基丙烯酸合成的分子印迹聚合物对模板分子苯甲酸的氢键作用力和结合能力都比较强。 相似文献
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苏丹红Ⅰ分子印迹聚合物的制备与识别性能研究 总被引：1，自引：0，他引：1
潘卫东 《连云港职业技术学院学报》2006,19(4):9-11
通过分子印迹技术,以苏丹红Ⅰ为印迹分子,甲基丙烯酸为功能单体,季戊四醇三丙烯酸酯为交联剂,偶氮二异丁腈做引发剂,制备了苏丹红Ⅰ分子印迹聚合物.利用静态平衡法和Scatchard分析法研究了印迹聚合物和非印迹聚合物对苏丹红Ⅰ选择吸附性能.结果表明,印迹聚合物对苏丹Ⅰ具有很好的特异性结合能力,为复杂样品中的苏丹红I的选择性富集及快速检测提供了一条新的途径. 相似文献
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分子印迹原理及其聚合物的合成 总被引：1，自引：0，他引：1
本文对分子印迹技术的基本原理，分子印迹聚合物的合成方法，结合机理和影响的因素进行了综述，并且介绍了分子印迹技术的最新研究进展，包括用于毛细管电色谱的印迹聚合物整体柱的合成，印迹聚合物微球的合成。表面模板印迹聚合物的合成，以及它们的性质研究等。 相似文献
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以4-氨基安替比林为模板分子,甲基丙烯酸为功能单体,十二醇／甲苯为溶剂,采用沉淀聚合法制备了对模板分子具有特异吸附的分子印迹聚合物,考察了制备条件,如溶剂用量、功能单体浓度和交联剂浓度对聚合物吸附性能的影响．静态吸附实验结果表明,在模板分子与功能单体、交联剂摩尔比为1：5：20的条件下,可制备出吸附量大且特异性识别能力较佳的分子印迹聚合物,对4-氨基安替比林及其结构类似物安替比林的分离因子为3．72． 相似文献
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Sovichea Lay Hai-ning Yu Bao-xiang Hu Sheng-rong Shen 《Journal of Zhejiang University. Science. B》2016,17(6):465-475
A pre-treatment methodology for clenbuterol hydrochloride (CLEN) isolation and enrichment in a complex matrix environment was developed through exploiting molecularly imprinted polymers (MIPs). CLEN-imprinted polymers were synthesized by the combined use of ally-β-cyclodextrin (ally-β-CD) and methacrylic acid (MAA), allyl-β-CD and acrylonitrile (AN), and allyl-β-CD and methyl methacrylate (MMA) as the binary functional monomers. MAA-linked allyl-β-CD MIPs (M-MAA) were characterized by Fourier transform-infrared (FT-IR) spectroscopy and a scanning electron microscope (SEM). Based upon the results, M-MAA polymers generally proved to be an excellent selective extraction compared to its references: AN-linked allyl-β-CD MIPs (M-AN) and MMA-linked allyl-β-CD MIPs (M-MMA). M-MAA polymers were eventually chosen to run through a molecularly imprinted solid-phase extraction (MISPE) micro-column to enrich CLEN residues spiked in pig livers. A high recovery was achieved, ranging from 91.03% to 96.76% with relative standard deviation (RSD) ≤4.45%. 相似文献
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以非洛地平原料药为模板,分别采用丙烯酰胺,甲基丙烯酸及其两者按（1：1）的混合为功能单体,加入交联剂二甲基丙烯酸乙二醇酯,采用封管聚合法制备非洛地平的分子印迹聚合物,实验结果通过Scatchard方程分析可知,非洛地平（甲基丙烯酸）分子聚合物对非洛地平有着良好的选择性,可进一步应用于临床非洛地平药物的分离富集和检测. 相似文献
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采用表面分子印迹技术,在硅胶表面合成了苄嘧磺隆印迹聚合物（MIPs）,将MIPs超声分散于氨基苯磺酸溶液中,通过在金电极表面电聚合氨基苯磺酸制备了苄嘧磺隆传感器,采用循环伏安法对电极制备过程进行了表征。 相似文献
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为电网分析、计算提供准确的BPA标准发电机励磁系统模型参数,文章在Matlab环境下建立发电机励磁系统标准模型,以现场试验数据为基础,对模型参数进行辨识并确定其模型参数。随后,通过BPA软件进行空载阶跃响应校核以及负载阶跃响应校核,结果与现场实测波形基本一致,从而认为辨识得到的BPA标准模型参数是正确和有效的。 相似文献
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A new fusion approach based on distance of evidences 总被引：11，自引：0，他引：11
INTRODUCTION Interest in data fusion has markedly increased over the last decade, especially for military applica-tions; and is also widely used in other fields, such as image processing and analysis and classification or target tracking (Goodman et al., 1997; Linas and Waltz, 1990; Hall and Linas, 2001). Based on the framework of evidence theory, data fusion relies on the use of combination rules allowing the belief functions for the different propositions to be com-bined. Dempster’s … 相似文献
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清华简《保训》述及舜"求中"、"得中",上甲微"假中"、"归中",论者说以中道。借助对有关记载的中、中和、中正、中庸及相关的极、皇极诸概念的比证分析,可知中乃一内涵极为丰富的政治伦理概念,代表了中国古代的治道理想,其义当从三代的河洛文化背景内寻绎。"保训"当读为"宝训",但绝非"珍贵的训诫"。宝者以道为贵宝,其义存于《逸周书·宝典》所记载武王对周公的训谕之中。 相似文献
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Jian-xiang Liu Min-ying Zhu Ci-yuan Feng Hai-bin Ding Ying Zhan Zhan Zhao Yue-min Ding 《Journal of Zhejiang University. Science. B》2015,16(7):593-601
Senile dementia (SD) is a syndrome characterized by progressive neurological deterioration. Treatment for the disease is still under investigation. Bamboo leaf extract (B-extract) has been known for its biological efficacy in anti-oxidant and anti-cancer activities. However, study on B-extract for its protection against dementia is very limited. The effect of B-extract on a rat model with SD was examined. B-extract improved spatial learning ability of the dementia rats. The hippocampus of dementia model rats showed reduced levels of acetylcholine (ACh), epinephrine (E), norepinephrine (NE), and dopamine (DA), and increased activities of acetylcholine esterase (AChE) and monoamine oxidase (MAO). Treatment with B-extract 20 mg/(kg·d) for 7 weeks significantly inhibited the enzyme activity compared with untreated dementia rats, and raised the levels of ACh, E, and DA in the hippocampus. In addition, treatment with B-extract elevated the level of γ-aminobutyric acid (GABA), but reduced the level of glutamate (Glu) in the brain. These data suggest that B-extract might be a potential drug in treating impairment of spatial memory in dementia rats by regulating the central neurotransmitter function. 相似文献
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Wootton-Gorges SL Stein-Wexler R Walton JW Rosas AJ Coulter KP Rogers KK 《Child abuse & neglect》2008,32(6):659-663
PURPOSE: Chest radiographs (CXR) are the standard method for evaluating rib fractures in abused infants. Computed tomography (CT) is a sensitive method to detect rib fractures. The purpose of this study was to compare CT and CXR in the evaluation of rib fractures in abused infants. METHODS: This retrospective study included all 12 abused infants identified from 1999 to 2004 who had rib fractures and both CXR and CT (8 abdomen CTs, 4 chest CTs). CT exams had been performed for clinical indications, and were obtained within one day of the CXR. Studies were reviewed by two pediatric radiologists to determine the number, locations, and approximate ages of the rib fractures. A total of 225 ribs were completely (192) or partially (33) seen by CT, and the matched ribs on CXR were used for the analysis. RESULTS: The mean patient age was 2.5 months (1.2-5.6), with seven females and five males. While 131 fractures were visualized by CT, only 79 were seen by CXR (p<.001). One patient had fractures only seen by CT. There were significantly (p<.05) more early subacute (24 vs. 4), subacute (47 vs. 26), and old fractures (4 vs. 0) seen by CT than by CXR. Anterior (42 vs. 11), anterolateral (21 vs. 12), posterolateral (9 vs. 3) and posterior (39 vs. 24) fractures were better seen by CT than by CXR (p<.01). Bilateral fractures were detected more often by CT (11) than by CXR (6). CONCLUSIONS: While this study group is small, these findings suggest that CT is better than CXR in visualizing rib fractures in abused infants. 相似文献