Electrospun nickel loaded porous carbon nanofibers for simultaneous determination of adenine and guanine

Improving Functional Behavior of MCM‐41 by Encapsulating MnO2 Nanorods towards Simultaneous Determination of Purine Bases in DNA Samples

“…Variation of scan rate to higher values resulted in an increase in oxidation peak currents for both GU (supporting information, Figure S3A) and AD (supporting information, Figure S4A). A perfect linear relationship is observed from the plots of current vs. scan rate justifying the electrooxidation of GU and AD at GCE/MnO 2 @MCM-41 is an adsorption controlled process (supporting information, Figures S3B and S4B respectively) [42,43]. Corresponding linear regression equations are shown in the respective figures.…”

Fabrication of Cu−CeO2 Coated Multiwall Carbon Nanotube Composite Electrode for Simultaneous Determination of Guanine and Adenine

“…This value indicate that electrochemical oxidation process of guanine have equal numbers of electrons are protons. It was described that the electrochemical oxidation of guanine follows a two‐step mechanism including the total loss of 4e‐ and the first 2e‐ oxidation is rate‐determining step as shown in Scheme and 2 H + take part in the rate‐determining step, which is in good agreement with previously literature data . On the other hand, similar aspect of good linearity between peak potential of adenine electrooxidation and pH of supporting electrolyte was also obtained with slope of −60.92 mV pH −1 which is also very close to the theoretical value (Figure C).…”

“…Both two bases have well‐known effects on coronary system, cerebral circulation, blood flow, cardiac arrhythmias and neurotransmitter release . The abnormal changes in the ratio of these compounds in organism may cause some diseases such as cancer, HIV, epilepsy, tumor‐genesis, mental retardation, Parkinson's disease, and liver diseases . Therefore; simple, cheap and fast analytical methods are needed for sensitive and selective determination of these two bases.…”

“…In order to overcome these problems various kinds of materials for electrode modification have been developed and used for analysis guanine and adenine in DNA . In recent years, varieties of materials have been used for this purpose such as, carbon nanotubes , graphenes , metal nanoparticles , metal oxides , polymer films , metal phthalocyanines , nanofibers etc.…”

A novel and label-free biosensors for uracil-DNA glycosylase activity based on the electrochemical oxidation of guanine bases at the graphene modified electrode

“…It has been reported that graphene modified electrode can improve the electrochemical oxidation of guanine and enhance the detection sensitivity of guanine [16,17], comparing to other modified electrodes, such as carbon nanofibers modified electrode [18], PbO 2 -carbon nanotube-ionic liquid composite film modified electrode [19], cobalt phthalocyanine modified carbon nanotubes paste electrode [20], and so on. Meanwhile, it has been known that unique 2-D structure of graphene is useful for forming π-π stacking between graphene and ssDNA, which is effective for the adsorption of ssDNA onto the surface of graphene.…”