Mechanism of sequence-specific fluorescent detection of DNA by N-methyl-imidazole, N-methyl-pyrole, and Beta-alanine linked polyamides

Article Abstract:

The fluorescence amplification, when bound to the target DNA sequence, makes polyamide-tetramethylrhodamine (TMR) conjugates, quenched in solution, potentially useful for the detection of specific DNA sequences in homogeneous solution. Reductive quenching of Xanthene fluorophores similar to TMR are observed by nucleobases and extremely short lifetimes has been observed for electron-transfer quenching of fluorescein complexed with anticalin.

Science & research, Research, Nucleotide sequence, Base sequence, Chemistry, Physical and theoretical, Physical chemistry

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Adsorption, ionization, and migration of hydrogen chloride on ice films at temperatures between 100 and 140 K

Article Abstract:

Adsorption of hydrogen chloride (HCl) on water ice films is studied in the temperature range of 100-140 K by using Cs(super +) relative ion scattering, low energy sputtering, and temperature-programmed-desorption mass spectrometry. An adsorption kinetics study reveals that HCl adsorption into the ionized state is slightly favored over adsorption into the molecular state at 100K, leading to earlier saturation of the ionized state.

Hydrogen chloride, Thermal properties, Ice, Properties

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Studies on electrochemical oxidation mechanisms of polyamides containing N-methlpyrrole and N-methylimidazole by electro spray ionization tandem mass spectrometry

Article Abstract:

Electro spray ionization tandem mass spectrometry (ESI-MS(super n)) is used to investigate electrochemical oxidation mechanism of polyamides containing N-methylpyrrole and N-methylimidazole. It is found that electrochemical oxidation preferably takes place on the imidazole ring of the polyamide with both imidazole and pyrrole to produce a carbonyl group of the rings.

Oxidation-reduction reaction, Oxidation-reduction reactions, Chemical properties

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