• 제목/요약/키워드: Label-Free

검색결과 156건 처리시간 0.027초

전기화학적 방법에 의한 바이오칩의 SNP 검출 (SNP Detection of Biochip Using Electrochemical System)

  • 최용성;박대희
    • 대한전기학회:학술대회논문집
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    • 대한전기학회 2004년도 하계학술대회 논문집 C
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    • pp.2128-2130
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    • 2004
  • High throughput analysis using a DNA chip microarray is powerful tool in the post genome era. Less labor-intensive and lower cost-performance is required. Thus, this paper aims to develop the multi-channel type label-free DNA chip and detect SNP (Single nucleotide polymorphisms). At first, we fabricated a high integrated type DNA chip array by lithography technology. Various probe DNAs were immobilized on the microelectrode array. We succeeded to discriminate of DNA hybridization between target DNA and mismatched DNA on microarray after immobilization of a various probe DNA and hybridization of label-free target DNA on the electrodes simultaneously. This method is based on redox of an electrochemical ligand.

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전기화학적 바이오칩의 개발에 관한 연구 (A Study on the Development of Electrochemical Biochip)

  • 최용성;권영수;박대희
    • 대한전기학회:학술대회논문집
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    • 대한전기학회 2003년도 추계학술대회 논문집 전기물성,응용부문
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    • pp.300-302
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    • 2003
  • This research aims to develop the multi-channel type label-free DNA chip that has the above characteristics and be able to solve the problems. At first, we fabricated a high integrated type DNA chip array by lithography technology. It is able to detect a various genes electrochemically after immobilization of a various probe DNA and hybridization of label-free target DNA on the electrode s simultaneously.

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Label-Free Molecular Imaging of Living Cells

  • Fujita, Katsumasa;Smith, Nicholas Isaac
    • Molecules and Cells
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    • 제26권6호
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    • pp.530-535
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    • 2008
  • Optical signals based on Raman scattering, coherent anti-Stokes Raman scattering (CARS), and harmonic generation can be used to image biological molecules in living cells without labeling. Both Raman scattering and CARS signals can be used to detect frequencies of molecular vibrations and to obtain the molecular distributions in samples. Second-harmonic optical signals can also be generated in structured arrays of noncentrosymmetric molecules and can be used to detect structured aggregates of proteins, such as, collagen, myosin and tubulin. Since labeling techniques using chemical and biological reactions may cause undesirable changes in the sample, label-free molecular imaging techniques are essential for observation of living samples.

Label-Free and Real-Time Monitoring of Phosphatase Reactions Using a Phosphate-Specific and Fluorescent Probe

  • Lee, Ji-Hoon;Ahn, Hee-Chul;Shin, Dong-Yun;Ahn, Dae-Ro
    • Bulletin of the Korean Chemical Society
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    • 제29권5호
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    • pp.943-947
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    • 2008
  • A phosphate-specific and fluorescent probe was prepared for label-free phosphatase assays based on fluorescence polarization. By using the probe, dephosphorylation reactions of DNA and protein substrates by calf intestinal alkaline phosphatase (CIP) could effectively be monitored in real-time. Since this assay method does not require additional materials such as labeled substrates and phosphospecific antibodies to obtain fluorescence polarization signals, it is simple, cost-effective, and expected to be useful not only for measuring activity of phosphatases but also for high-throughput screening of phosphatase inhibitors.

전기화학적 방법에 의한 신규 바이오칩의 SNP 검출 (SNP Detection of Arraye-type DNA Chip using Electrochemical Method)

  • 최용성;권영수;박대희
    • 한국전기전자재료학회논문지
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    • 제17권4호
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    • pp.410-414
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    • 2004
  • High throughput analysis using a DNA chip microarray is powerful tool in the post genome era. Less labor-intensive and lower cost-performance is required. Thus, this paper aims to develop the multi-channel type label-free DNA chip and detect SNP (Single nucleotide polymorphisms). At first, we fabricated a high integrated type DNA chip array by lithography technology. Various probe DNAs were immobilized on the microelectrode array. We succeeded to discriminate of DNA hybridization between target DNA and mismatched DNA on microarray after immobilization of a various probe DNA and hybridization of label-free target DNA on the electrodes simultaneously. This method is based on redox of an electrochemical ligand.

마이크로전극어레이형 바이오칩을 이용한 SNP의 검출 (Detection of SNP Using Microelectrode Array Biochip)

  • 최용성;권영수;박대희
    • 한국전기전자재료학회:학술대회논문집
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    • 한국전기전자재료학회 2004년도 하계학술대회 논문집 Vol.5 No.2
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    • pp.845-848
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    • 2004
  • High throughput analysis using a DNA chip microarray is powerful tool in the post genome era. Less labor-intensive and lower cost-performance is required. Thus, this paper aims to develop the multi-channel type label-free DNA chip and detect SNP (Single nucleotide polymorphisms). At first, we fabricated a high integrated type DNA chip array by lithography technology. Various probe DNAs were immobilized on the microelectrode array. We succeeded to discriminate of DNA hybridization between target DNA and mismatched DNA on microarray after immobilization of a various probe DNA and hybridization of label-free target DNA on the electrodes simultaneously. This method is based on redox of an electrochemical ligand.

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CFGL 연결성 결정에 대한 병렬 알고리듬 (Parallel Algorithm for Determining Connectedness of Context Free Graph Languages)

  • 방혜자;이철희
    • 전자공학회논문지B
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    • 제30B권1호
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    • pp.10-17
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    • 1993
  • This paper analyzes succinct graph descriptions and its complexity of connectivity problems on context free graph languages under various restrictions. It defines SNLC(Simple Context Free Node Label Controlled) grammar and presents reduction method that solves graph problems without expanding the hierarchical description. It exemplifies the method by giving efficient solutions to connectivity problems on graphs and presents parallel algorithm for reduction and analyzes the complexity. Its results will help application of desing for NETWORK. CAD. VLSI and other engineering problems.

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