Photodynamic inactivation of Escherichia coli by methylene blue incorporated in ZSM-5 zeolite channels under red LED light

Study of antimicrobial effect of methylene blue incorporated in ZSM-5 zeolite

A new heterogeneous photocatalyst was prepared by incorporation of methylene blue into ZSM-5 zeolite. This photocatalyst effectively absorbs light in visible range of the spectrum and when irradiated with visible light, it generates reactive oxygen species (ROS) in aqueous environment. Efficiency of the photocatalyst was tested on dechlorination of a model compound 4-chlorophenol and on growth ...

Photodynamic inactivation effect of methylene blue and toluidine blue O on ATCC Escherichia coli and clinical isolate of multidrug-resistant Escherichia coli

Photodynamic inactivation of drug-resistant bacteria isolated from diabetic foot ulcers

BACKGROUND AND OBJECTIVES Due to the extensive use of antibiotics, the spread of drug-resistant bacteria is one of the most worrisome threats to public health. One strategy that can be used to overcome potential shortcomings might be the inactivation of these organisms by photodynamic therapy. In this study, we have investigated whether drug-resistant wound-associated organisms (Staphylococcus ...

The Effect of Methylene Blue in Combination with Red Visible Light on Model Viruses Inactivation and Coagulation Factors in Fresh Frozen Plasma

Background and Aims: Fresh Frozen Plasma (FFP) is one of blood components. The risk of transmission of viruses from blood components regardless selection of blood donors and screening donated blood still remains. There are several methods for viral inactivation. In this study methylene blue (MB) photo inactivation process was used for inactivating viruses. Materials and Methods: In this study M...

Fast and slow inactivation of sodium channels: effects of photodynamic modification by methylene blue.

Illumination of crayfish giant axons, during internal perfusion with 0.5 mM methylene blue (MB), produces photodynamic effects that include (i) reduction in total sodium conductance, (ii) shifting of the steady-state inactivation curve to the right along the voltage axis, (iii) reduction in the effective valence of steady-state inactivation and, (iv) potentially complete removal of fast inactiv...