文化大學機構典藏 CCUR:Item 987654321/2471
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    题名: Development of a piezoelectric immunosensor for the detection of alpha-fetoprotein
    作者: Tsai, Wen-Chi;Lin, I-Chien
    贡献者: 生物科技研究所
    日期: 2005
    上传时间: 2009-11-02 11:14:58 (UTC+8)
    摘要: A piezoelectric immunosensor was developed for the detection of a-fetoprotein (AFP) in human serum. A number of immobilization schemes via amine-functionalized coating have been studied and evaluated for their potential use in fabricating a piezoelectric immunosensor. These included polyethyleneimine (PEI) and two different types of self-assembled monolayers (SAM), cystamine and cysteamine. Antibody was immobilized into the amine-coated surface via glutaraldehyde (GA) cross-linking. Antibodies cross-linked at 1.25% GA for 40 min showed the best activity. The amount and the reaction activity of bound antibody on PEI film were better than those on SAM. The calibration graph for AFP obtained by the immunosensor was linear up to 800 ng/ml. Application of the immunosensor to clinical samples demonstrated that results were in good agreement with ELISA. No cross-reactivates were observed with the common endogenous substances in serum, such as glucose (1 mg/ml), ascorbic acid (1 mg/ml) and uric acid (0.25 mg/ml). The antibody-modified crystals showed no significant loss in activity over 3 days under storage at 4 ° C. © 2004 Elsevier B.V. All rights reserved.
    關聯: SENSORS AND ACTUATORS B-CHEMICAL Volume: 106 Issue: 1 Pages: 455-460
    显示于类别:[生物科技研究所 ] 期刊論文

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