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《农产品质量与安全》2017,(1)
噬菌体免疫PCR(Phage-mediated immuno-polymerase chain reaction,PD-IPCR)技术融合了噬菌体展示技术、特异性抗原-抗体和PCR技术,是三者相结合而派生出来的一项新分析技术。本文介绍了PD-IPCR技术的发展历程、技术原理及类型和技术流程中的关键实验方法,列举了一些噬菌体免疫PCR技术及其在真菌毒素检测中的应用,并结合PD-IPCR技术特点,分析了PD-IPCR技术在真菌毒素混合污染同步检测和污染预警研究等方向上的重要应用前景。 相似文献
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兽药残留对环境和人类健康构成严重威胁,使得动物源性食品安全问题日益突出,迫切需要开发简便、价廉、快速的兽药残留快速检测技术.目前各种免疫分析技术已广泛应用于兽药残留快速检测领域,本文主要概述了酶联免疫分析法(ELISA)、量子点荧光免疫分析(QIA)、放射免疫分析法(RIA)、荧光偏振免疫分析(FPIA)、胶体金免疫层析法(GICA)及蛋白质芯片免疫分析技术. 相似文献
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免疫分析技术在农药分析中的应用 总被引：1，自引：0，他引：1
<正> 免疫分析已广泛用于内分泌学、临床化学和其它领域,但在环境化学上的应用才刚刚开始。这主要是由于环境分析化学家们原先的兴趣在气—液色谱分析上。某些高效低毒新农药的发展已经提醒制订法规的机构去探索较低的检测极限(ng/ml到pg/ml)。同时,对长期暴露于低水平农药残留物下的不良后果的担忧导致对作物和环境的监测程序更加复杂。这就产生了目前分析技术难以承担大规模样品检测问题,从而促使分析化学家探索以免疫分析手段作 相似文献
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黄曲霉毒素免疫检测技术研究进展 总被引：2，自引：0，他引：2
黄曲霉毒素是迄今发现的毒性最强的一类真菌毒素,对该毒素的检测技术特别是快速检测方法对发展中国家保障农产品及食品消费安全具有特别重要意义。本文介绍了黄曲霉毒素特异性抗体及其免疫快速检测技术研究进展,提出了绿色免疫分析是黄曲霉毒素等剧毒生物毒素免疫快速检测技术的发展方向。 相似文献
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应用于环境中有机污染物分析的一些新技术 总被引：2，自引：0，他引：2
本简述了近年来研究较多的快速检测技术，免疫检测法、传感器，及色谱的一些新发展，还讨论了固相萃取，超临界流体萃取，免疫亲合色谱提取净化的方法及其新进展。 相似文献
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基因表达系列分析技术及其在植物抗病性研究中的应用 总被引：1，自引：0，他引：1
基因表达系列分析(SAGE)技术不仅能够全面地分析特定组织或细胞内表达的基因，还可以比较不同组织在不同时间、空间条件下基因表达的差异，从而发现新基因。SAGE技术在植物抗病性研究中的应用近几年发展很快。综述介绍了SAGE技术的原理、特点、实验方案、技术发展与演变。 相似文献
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Weller MG Diemer M Wersching C Niessner R Sochor H 《Journal of agricultural and food chemistry》2003,51(23):6668-6675
Glufosinate is a widely used herbicide, which is difficult to detect by conventional analytical techniques. For many other herbicides, suitable antibodies have been raised for immunoassay development. Unfortunately, glufosinate is a very small molecule and difficult to immunize with. Thus, a derivatization-assisted immunoassay (DAIA) using the target analyte N-acetyl-glufosinate (NAG) was constructed. The activated hapten was synthesized by a new approach, using a homobifunctional cross-linker suberic acid bis(N-hydroxysuccinimide ester). The preparation of a suitable conjugate, the immunization, and the characterization of polyclonal antibodies are shown. The determination of the conjugation density (hapten density) of the immunogens was performed by four different methods (high-performance liquid chromatography with a refractive index detector, total reflection X-ray fluorescence, inductively coupled plasma mass spectrometry, and matrix-assisted laser desorption/ionization time-of-flight mass spectrometry), which gave similar results. The limit of detection was 17 mug/L NAG in water for the direct competitive enzyme immunoassay. NAG is also a main metabolite of glufosinate in resistant transgenic plants. The antibodies might be useful for the selective detection of NAG in the presence of the parent compound glufosinate (cross-reactivity 0.13%) and other metabolites. 相似文献
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Development of an analytical scheme for simazine and 2,4-D in soil and water runoff from ornamental plant nursery plots 总被引：1，自引：0，他引：1
The transport and fate of pesticides applied to ornamental plant nursery crops are not well documented. Methodology for analysis of soil and water runoff samples concomitantly containing the herbicides simazine (1-chloro-4,6-bis(ethylamino)-s-triazine) and 2,4-D ((2,4-dichlorophenoxy)acetic acid) was developed in this research to investigate the potential for runoff and leaching from ornamental nursery plots. Solid-phase extraction was used prior to analysis by gas chromatography and liquid chromatography. Chromatographic results were compared with determination by enzyme-linked immunoassay analysis. The significant analytical contributions of this research include (1) the development of a scheme using chromatographic mode sequencing for the fractionation of simazine and 2,4-D, (2) optimization of the homogeneous derivatization of 2,4-D using the methylating agent boron trifluoride in methanol as an alternative to in situ generation of diazomethane, and (3) the practical application of these techniques to field samples. 相似文献
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A highly selective and sensitive mesofluidic immunoassay system based on competitive immunoassay in polydimethylsiloxane (PDMS) channels was developed. This immunoassay system was successfully applied to quantificationally detect chloramphenicol (CAP) in animal foods. The glass beads (? 250 microm) were amino-silane modified, covalently precoated with chloramphenicol succinate, and then infused into the microchannels (? 300 microm); the CAP molecules of samples or standards in flow solution competed for CAP antibody with the CAP immobilized on the beads. The CAP antigen-antibody complex anchored on the beads was probed by Cy5-labeled secondary antibody, and the fluorescence intensities of beads were employed to determine the concentration of CAP. In this system, the detection limit of CAP is 0.008 microg/L. The method reveals good recovery rates from 90 to 108% and coefficients of variance (CV) from 4.72 to 6.52%. The experimental results demonstrate that the bead-based mesofluidic system has high sensitivity and excellent performance. Indeed, this system can readily be operated automatically and expanded for multicomponent analysis. It is therefore an attractive alternative to conventional immunoassays in routine supervised domain application for contamination in foods or the environment. 相似文献
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Daly SJ Keating GJ Dillon PP Manning BM O'Kennedy R Lee HA Morgan MR 《Journal of agricultural and food chemistry》2000,48(11):5097-5104
Aflatoxins are a group of highly toxic fungal secondary metabolites that occur in Aspergillus species and may contaminate foodstuffs and feeds. Two different anti-aflatoxin B(1) antibodies were examined to develop a surface plasmon resonance (SPR)-based immunoassay to aflatoxin B(1). A conjugate consisting of aflatoxin B(1)-bovine serum albumin (BSA) was immobilized on the dextran gel surface. Competition between immobilized aflatoxin B(1) conjugate and free aflatoxin B(1) in solution for binding to antibody injected over the surface formed the basis for the assay. Regeneration of the antibody from the immobilized conjugate surface is essential for the development of such an inhibitive immunoassay. Problems were encountered with the regeneration of the sensor surface, due to the high-affinity binding of the antibodies. Conventional regeneration solutions consisting of low concentrations of NaOH and HCl worked to a degree, but regeneration was at the expense of the integrity of the immobilized conjugate. A polyclonal anti-aflatoxin B(1) antibody was produced and was found to be regenerable using an organic solution consisting of 1 M ethanolamine with 20% (v/v) acetonitrile, pH 12.0. This combined high ionic strength and extreme pH, as well as chaotrophic properties and allowed the development of an inhibitive immunoassay. The assay had a linear range of 3.0-98.0 ng mL(-1) with good reproducibility. 相似文献
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Sibanda L De Saeger S Barna-Vetro I Van Peteghem C 《Journal of agricultural and food chemistry》2002,50(24):6964-6967
A membrane-based flow-through enzyme immunoassay (patent application pending) for the detection of ochratoxin A (OA) in roasted coffee was developed. First, an extraction and solid-phase cleanup method was developed. A high partition coefficient for OA in the mobile phase was achieved by using methanol/5% aqueous NaHCO(3) as the sample extraction and cleanup solvent. The solid-phase (aminopropyl) cleanup was developed to chromatographically elute OA but retain cross-reacting compounds. Without using aminopropyl cleanup, cross-reacting compounds resulted in 100% false positives for both flow-through enzyme immunoassay and HPLC methods. However, after cleanup with aminopropyl, no false positives were observed. The flow-through results were visually evaluated. The sensitivity achieved for the flow-through was 4 microg kg(-1) in spiked roasted coffee. The assay was used to screen roasted coffee samples. Results were confirmed with HPLC with a detection limit of 1 microg kg(-1). 相似文献
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针对同一领域内功能结构相近的应用系统开发工作建立软件开发平台,正成为软件开发领域内新的热点之一。为避免重复劳动,降低工作成本,提高工作质量,在对生态环境建设领域内,众多以空间信息为基本分析对象的应用系统进行分析比较之后,以多个应用系统之间的复用信息为基础,使用面向对象技术,采取分层构建的方法,建立了一套以应用型GIS系统内核为核心的基于空间信息的生态环境建设应用系统软件开发平台。 相似文献
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固氮蓝藻的农业应用研究进展 总被引：2，自引：0，他引：2
作为可固氮固碳的自养光合微生物,固氮蓝藻是一种非常重要的微生物资源。关于固氮蓝藻在农业生产上的应用始于1939年印度首次报道用固氮蓝藻肥田,之后一段时期虽然受到国际广泛关注,但最终并未实现规模化推广应用。究其原因既与化肥在世界范围内的大规模使用有关,也与自身技术相对复杂、成本高和可靠性低有关。对于前者虽然化肥的农业增产作用巨大,但其对农业自身和生态环境的负面影响日益凸显。而对于后者,新的固氮蓝藻规模化生产技术和新的接种技术的发展正在逐步消除这些缺陷。在当前国家要求农业"减量化"和"低碳化"发展的背景下,固氮蓝藻作为生态环保的生物肥料可能迎来新的发展契机。同时,除了作为生物肥料,近年来国内外的研究表明固氮蓝藻具有多重农业应用价值,可能在作物生长调节剂和生物农药开发、农业环境污染防治和农业生态环境保护等方面发挥作用。因此,本文就国内外近5年(2013—2017年)关于固氮蓝藻的农业应用进展进行了全面综述,并就存在的问题和今后的发展方向做了展望。今后固氮蓝藻作物生长调节方面需深入研究藻激素的代谢和调控机制,藻接种技术方面需深入研究生物膜中藻类和其他微生物的互作关系,抗病虫害方面需要进行更多的田间试验以评估其实际应用效果并阐明抗性机制,降解有机农药方面需深入研究降解关键酶、降解途径和大田应用技术,生态环境保护方面需评估固氮蓝藻抗旱抗盐碱实际应用效果并阐明其机理。 相似文献
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Hapten synthesis and monoclonal antibody-based immunoassay development for the detection of the fungicide kresoxim-methyl 总被引：1，自引：0，他引：1
Mercader JV Suárez-Pantaleón C Agulló C Abad-Somovilla A Abad-Fuentes A 《Journal of agricultural and food chemistry》2008,56(5):1545-1552
Strobilurin fungicides have been increasingly used for fungus pest control since they were introduced in 1996. For pesticide residue detection, immunoassays constitute nowadays a valuable approach. This paper describes the synthesis of functionalized haptens of kresoxim-methyl, the production of monoclonal antibodies, and the development of enzyme-linked immunosorbent assays. On the one hand, a two-step conjugate-coated immunoassay was optimized using extended or short incubation times, with limits of detection of 0.4 ng/mL for the extended assay and 0.3 ng/mL for the rapid assay. On the other hand, an immunoassay was optimized following a procedure consisting of just one incubation step. This one-step assay had a limit of detection of 0.4 ng/mL. All of these assays showed a similar performance, with sensitivities well below common maximum residue limits for this pesticide (50 microg/kg) and lower than the detection limits of the usual chromatographic detection methods. 相似文献