解吸
吸附
纳米技术
DNA纳米技术
离子
结晶学
螺旋(腹足类)
吸收(声学)
分子
DNA折纸
DNA
化学
Atom(片上系统)
材料科学
纳米材料
纳米颗粒
物理化学
有机化学
蜗牛
复合材料
嵌入式系统
生物
生物化学
计算机科学
生态学
作者
Tamar G. Giorgadze,Vasil G. Bregadze
出处
期刊:Society of Photo-Optical Instrumentation Engineers (SPIE) Conference Series
日期:2021-04-18
摘要
The main goal of the research is to study the catalytic properties of the DNA in the reactions of reduction of silver ions and photo-induced processes due to the unique structural properties and capabilities of molecular recognition of DNA using spectroscopic and thermodynamic methods. Reduction of silver ions (Ag+) on a double helix of the DNA is based on inter-strand crosslink formation model consisting of several adsorption processes. It is shown that inter-strand crosslink is an absorption process consisting of several simple adsorption processes and the time of this absorption process is the sum of adsorption times. The conformational transitions of DNA caused by photo-irradiation of silver atoms (Ag0) on the DNA molecule have been studied. Photo-induced desorption of silver atoms from DNA double helix is a complex and multiphase process, which, for its part, causes conformational transitions in DNA. In particular, we have two states of bonding of silver atoms the first state before irradiation and the second state after irradiation. Kinetic study of the photo-desorption of silver atoms from the DNA-Ag0 complex obtained desorption rate constant 𝑘𝑑 and adsorption heat Qa, which are kd ≅ 1.8 × 10−4 s −1 and Qa ≥ 85 kJ/M (Ag0) for silver atoms which are bound to the DNA. The oscillatory force of the DNA-Ag0 complex for a silver atom is counted to by equal to f (434.3 nm) = 0.33.
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