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The Recognition and Determination of Double-Stranded DNA Using Amikacin by Resonance Rayleigh Scattering Method (CAT#: STEM-ST-0035-YJL)

Introduction

Nucleic acid is a sort of important biological macromalecule, and the quantification of nucleic acids, in particular double-stranded (ds) DNA, is crucial in many molecular biological and diagnostic applications. These include measurements of nucleic acids in biological material, determinations of cell concentration or cell proliferation, as well as the pre-, online-, or postevaluation of polymerase chain reactions (PCR).
Amikacin (AK) is a semisynthetic, water soluble, broad spectrum aminoglycoside antibiotic. It is commonly administered parenteral for the treatment of Gram-negative infections resistant to gentamicin, kanamycin or tobramycin because the AK molecule has fewer points susceptible to enzymatic attack than most other aminoglycosides. However, it has been well known that they could cause damage to the kidneys and cranial nerves. Therefore, it is important to study the reaction of AK with nucleic aicd.




Principle

Resonance Rayleigh scattering (RRS) is similar to Rayleigh scattering in nature. Resonance Rayleigh scattering is a special elastic scattering produced when the wavelength of Rayleigh scattering (RS) is located at or close to its molecular absorption band. The key to generating RRS is: when the scattering is at or close to the absorption band of the scattering molecule, since the electron absorbs the electromagnetic wave at the same frequency as the scattering frequency, the electron strongly absorbs the photon energy due to resonance and re-scatters. Its scattering intensity is several orders of magnitude higher than that of pure Rayleigh scattering, and it no longer obeys the Rayleigh law of I∝λ-4. This absorption-rescattering process is called resonance Rayleigh scattering (RRS).

Applications

Resonance Rayleigh scattering is used to the study of aggregation of chromophores on biological macromolecules and the determination of biological macromolecules such as nucleic acid, proteins and heparin, further, it has been used in the determination of trace amounts of inorganic ions and the cationic surfactant by means of ion association reactions with some dyes. In addition, it has been applied to the study of nanoparticles in liquid and the determination of β-cyclodextrin inclusion constant and the critical micelle concentration of surfactant.

Procedure

1. Sample preparation
2. Measurement by scattering detection instrument
3. Data analysis

Materials

Rayleigh scattering measurement system
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