| 光谱学与光谱分析 |
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| Quantitative Analysis of Nucleotide Mixtures with Terahertz Time Domain Spectroscopy |
| ZHANG Zeng-yan,XIAO Ti-qiao*,ZHAO Hong-wei,YU Xiao-han,XI Zai-jun,XU Hong-jie |
| Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China |
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Abstract Adenosine, thymidine, guanosine, cytidine and uridine form the building blocks of ribose nucleic acid (RNA) and deoxyribose nucleic acid (DNA). Nucleosides and their derivants are all have biological activities. Some of them can be used as medicine directly or as materials to synthesize other medicines. It is meaningful to detect the component and content in nucleosides mixtures. In the present paper, components and contents of the mixtures of adenosine, thymidine, guanosine, cytidine and uridine were analyzed. THz absorption spectra of pure nucleosides were set as standard spectra. The mixture’s absorption spectra were analyzed by linear regression with non-negative constraint to identify the components and their relative content in the mixtures. The experimental and analyzing results show that it is simple and effective to get the components and their relative percentage in the mixtures by terahertz time domain spectroscopy with a relative error less than 10%. Component which is absent could be excluded exactly by this method, and the error sources were also analyzed. All the experiments and analysis confirms that this method is of no damage or contamination to the sample. This means that it will be a simple, effective and new method in biochemical materials analysis, which extends the application field of THz-TDS.
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Received: 2007-05-10
Accepted: 2007-08-20
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Corresponding Authors:
XIAO Ti-qiao
E-mail: tqxiao@sinap.cn
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