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分子印迹技术是一种制备具有分子识别能力的聚合物的有效技术,已经广泛应用于制备对小分子具有选择性的分子印迹聚合物,但制备能够特异性识别生物大分子--蛋白质的分子印迹聚合物的研究仍然具有挑战性。本文讨论了制备蛋白质分子印迹聚合物的难点,评述了目前印迹蛋白质的方法及各自的优缺点,展望了蛋白质印迹技术的发展趋势。 相似文献
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采用反应条件温和的原子转移自由基聚合法(ATRP),以N-异丙基丙烯酰胺(NIPAAm)和丙烯酰胺(AAm)为功能单体,以N-(3-二甲氨基丙基)甲基丙烯酰胺(DMAPMA)为辅助功能单体,制备了以牛血清白蛋白(BSA)和溶菌酶(Lyz)为双模板蛋白质的表面印迹聚合物(Bi-MIP)。对印迹过程中辅助功能单体的量进行了考察,结果表明,在单一蛋白质溶液和混合蛋白质溶液中,当DMAPMA为20 μL时,制备的Bi-MIP对模板蛋白质BSA和Lyz有较好的吸附容量与选择性。通过静态吸附实验考察了Bi-MIP的吸附性能,并结合Langmuir吸附模型得到聚合物对模板蛋白质BSA和Lyz的最大吸附容量分别为10.2 mg/g和19.2 mg/g。且该印迹聚合物在实际样品中对模板蛋白质也表现出较强的吸附能力和较高的选择性。该方法将为复杂生物样品中同时对双/多种目标蛋白质的识别提供一种新的途径。 相似文献
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以双酚A(BPA)为模板分子,α-甲基丙烯酸(MAA)为功能单体,以含模板分子结构的双酚A二甲基丙烯酸酯(BPDMA)为交联剂,制备了含模板结构的分子印迹聚合物材料,并与以二甲基丙烯酸乙二醇酯(EGDMA)和N, N-亚甲基双丙烯酰胺(BIS)为交联剂制备的BPA印迹材料进行对比。结果表明:以BPDMA为交联剂制备的材料印迹性能最佳,其印迹因子为5.32,吸附量为5.05 mg/g;以EGDMA和BIS为交联剂制备的材料印迹因子分别为1.41和1.45,吸附容量分别为0.96 mg/g和2.79 mg/g。将所制备材料应用于牛奶中BPA的富集检测,得到的加标回收率为95.0%~98.9%,相对标准偏差为3.5%~4.2%,表明得到的印迹材料可用于复杂体系BPA的选择性富集。 相似文献
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采用分子印迹技术,以芹菜素为模板合成了其分子印迹聚合物,并优化了合成条件。采用平衡结合实验考察了印迹聚合物对底物的吸附性能与选择性,并对聚合物的印迹效率进行了评价。结果表明,以2-乙烯基吡啶(2-Vpy)为功能单体,乙二醇二甲基丙烯酸酯(EDMA)为交联剂,偶氮二异丁腈(AIBN)为引发剂,四氢呋喃(THF)为致孔剂,且当n(API):n(2-Vpy):n(EDMA)=1:8:40,反应温度为60℃时,所得的芹菜素分子印迹聚合物对底物具有高吸附性能和选择性识别能力;Scatchard分析表明,在研究的浓度范围内,聚合物中形成了对模板分子有不同亲和力的两类结合位点;芹菜素印迹聚合物的印迹效率为47.9%。 相似文献
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模板印迹聚合物作为一类对特定的底物具有高度选择性识别能力的智能材料,在环境污染的快速检测和清除方面受到了越来越多的关注。本文首先介绍了模板印迹聚合物的基本概念,然后重点介绍了近年来模板印迹聚合物在环境治理方面的应用进展,主要包括重金属、芳香化合物以及农药污染三个方面,讨论了模板印迹聚合物对这三类环境污染物的快速灵敏的检测以及有效便捷的清除,另外,其在实际样品中的应用情况也有讨论,最后分析了其在环境治理方面未来的发展前景。 相似文献
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分子印迹聚合物微球的制备及应用研究进展 总被引:6,自引:1,他引:6
球形分子印迹聚合物具有制备简单、使用方便;分子识别效率高且便于功能设计等优点,近年来成为分子印迹技术领域研究的热点之一。对球形分子印迹聚合物微球的制备及其应用研究进展作了较为详细的介绍。 相似文献
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Jun YANG Xiao Lan ZHU Ji Bao CAI Qing De SU Yun GAO Liang ZHANG 《中国化学快报》2005,16(11):1503-1506
A molecularly imprinted polymer (MIP), prepared around a cotinine template, has been synthesized. The feasibility of using the polymer for solid-phase extraction (SPE) of cotinine from biological samples has been investigated. The results show that cotinine can be quantitatively retained and eluted from the polymer. Experiments with human urine samples indicate that clean target analyte is obtained for HPLC with UV detection using the protocol. 相似文献
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M. Fenske 《Chromatographia》2007,65(3-4):233-238
A quantitative method using thin-layer chromatography (TLC) plates with concentrating zone and ultraviolet absorption densitometry
is described for caffeine (CAF) determination in human saliva and urine. The applicability of the CAF method was tested for
saliva and urine from male individuals. The changes of salivary CAF, urinary CAF concentration and of urinary CAF excretion
correspond with results of previous investigations using gas chromatography, high performance liquid chromatography, radioimmunoassay
or enzyme immunoassay methods. In summary, the thin-layer chromatography/densitometry method here described is easy to perform,
reproducible and accurate. Thus, it is suitable for routine analysis of CAF in human saliva or urine, being an effective alternative
to other, more expensive and more time-consuming chromatographic or immunological methods. 相似文献
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基于银增强金标记物的阳极溶出伏安免疫分析用于补体第三成分的测定 总被引:1,自引:1,他引:1
分子印迹是制备对特定分子具有专一性结合能力的聚合物的技术,所制备的聚合物被称为分子印迹聚合物(Molecularly imprinted polymers,MIPs),此类聚合物在分离提纯、模拟酶和传感器等方面均显示出广阔的应用前景,迄今,小分子化合物的印迹技术已经十分成熟。 相似文献
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Determination of human serum protein by molecularly imprinted polymer (MIP) derivatized inner wall of capillary coupling of capillary‐electrophoresis was successfully developed. The vinyl groups were introduced onto the silica by immobilization of ‐methacryloxypropyltrimethoxysilane. Then the MIP coating was copolymerized and anchored onto the surface of the silica. The other preparation conditions, such as monomer concentration, temperature, and time of polymerization, were systematically studied. The obtained MIP‐derivatized capillary was applied to capillary electrophoresis, which was used for the separation and determination of human serum protein. The optimization of the experimental conditions was determined by evaluating various controlling factors: running buffer pH = 9.6, 0.1 mol L‐1 boric acid‐sodium borate, separation voltage 30 kV, temperature 25 °C, detected wavelength 192 nm. 相似文献
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以羧基化的多壁碳纳米管(MWCNT)为基底,通过酰胺化表面接枝聚乙烯亚胺(PEI)得到MWCNT-PEI复合物功能单体,进而以没食子酸丙酯(PG)为模板分子、乙二醇二缩水甘油醚为交联剂,制备了PG表面分子印迹聚合物,最后采用滴涂法在玻碳电极(GCE)表面构建PG分子印迹电化学传感器。通过循环伏安、电化学阻抗和差分脉冲伏安等手段对所构建传感器的导电性以及PG分子的线性响应、特异识别性、检测稳定性和重复性等进行了测试与表征。结果表明,传感器在PG浓度为1×10~(-8)~1×10~(-5)mol/L的范围内具有良好的线性关系,相关系数为0. 9964,检出限达2. 5×10~(-9)mol/L。此外,该传感器在实际样品中的PG回收率为95%~98%。 相似文献
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以双酚F(4,4′-BPF)为模板分子,α-甲基丙烯酸(MAA)为功能单体,乙二醇二甲基丙烯酸酯(EGDMA)为交联剂,偶氮二异丁腈(AIBN)为引发剂,采用沉淀聚合法合成4,4′-BPF分子印迹聚合物(MIPs)。运用傅里叶红外(FT-IR)光谱对产物的结构进行表征,并对其吸附等温线、吸附动力学、吸附热力学及选择性识别性能进行研究。结果表明:MIPs对水相中4,4′-BPF具有特异性吸附,最大吸附容量为82.8 mg/g;Freundlich模型拟合吸附等温线的相关系数R2=0.995;热力学参数ΔG、ΔS、ΔH均小于0,表明此吸附过程是自发进行的、熵减的、放热的。 相似文献
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Hongyu Zeng Xiaoqing Zhang Qianna Zhen Yifan He Haoran Wang Yang Zhu Qi Sun Min Ding 《Molecules (Basel, Switzerland)》2022,27(11)
A novel dual-template magnetic molecularly imprinted polymer (MMIP) was synthesized to extract normetanephrine (NMN), metanephrine (MN) and 3-methoxytyramine (3-MT) from spot urine samples. As the adsorbent of dispersive solid-phase extraction (d-SPE), the MMIP was prepared using dopamine and MN as dual templates, methacrylic acid as the functional monomer, ethylene glycol dimethacrylate as the crosslinking reagent and magnetic nanoparticles as the magnetic core. NMN, MN, 3-MT and creatinine (Cr) in spot urine samples were selectively enriched by d-SPE and detected by HPLC-fluorescence detection/ultraviolet detection. The peak area (A) ratios of NMN, MN and 3-MT to Cr were used for the diagnosis of pheochromocytomas and paragangliomas (PPGLs). The results showed that the adsorption efficiencies of MMIP for target analytes were all higher than 89.0%, and the coefficient variation precisions of intra-assay and inter-assay for the analytes were within 4.9% and 6.3%, respectively. The recoveries of the analytes were from 93.2% to 112.8%. The MMIP was still functional within 14 days and could be reused at least seven times. The d-SPE and recommended solid-phase extraction (SPE) were both used to pretreat spot urine samples from 18 PPGLs patients and 22 healthy controls. The correlation coefficients of ANMN/ACr and AMN/ACr between d-SPE and SPE were both higher than 0.95. In addition, the areas under the receiver operator curves for spot urine ANMN/ACr, AMN/ACr and plasma free NMN and MN were 0.975, 0.773 and 0.990, 0.821, respectively, indicating the two methods had the similar performances. The d-SPE method took only 20 min, which was effective in clinical application. 相似文献