Effects of infrared and ultraviolet radiation on the viability of cells immobilized in porous TiNi-based alloy scaffold

Сell responses to electromagnetic radiation are due to many factors including the cellular microenvironment. The aim of the present study was to explore the effects of ultraviolet (UV) and infrared (IR) irradiation of low intensity on cultured cells derived from different biological tissues (spleen, bone marrow, and Ehrlich's adenocarcinoma), which were immobilized in a porous TiNi-based alloy scaffold. Accordingly, the following objectives were set: i) to evaluate the impact of low-intensity radiation on cell suspensions, and ii) to carry out a comparative analysis of the viability of cells immobilized in porous TiNibased alloy and IR- and UV-irradiated. The data show that the extracellular environment of bone marrow, tumor and spleen cel

Antibacterial ferroelectric hybrid membranes fabricated via electrospinning for wound healing

n the present study, wound healing ferroelectric membranes doped with zinc oxide nanoparticles were fabricated from vinylidene fluoride-tetrafluoroethylene copolymer and polyvinylpyrrolidone using the electrospinning technique. Five different ratios of vinylidene fluoride-tetrafluoroethylene to polyvinylpyrrolidone were used to control the properties of the membranes at a constant zinc oxide nanoparticle content. It was found that an increase of polyvinylpyrrolidone content leads to a decrease of the spinning solution conductivity and viscosity, causing a decrease of the average fiber diameter and reducing their strength and elongation. By means of X-ray diffraction and infrared spectroscopy, it was revealed that increased polyvinylpyrrolidone content leads to difficulty in crystallization of the vinylidene fluoride-tetrafluoroethylene copolymer in the ferroelectric β-phase in membranes. Changing the ratio of vinylidene fluoride-tetrafluoroethylene copolymer and polyvinylpyrrolidone with a constant content of zinc oxide nanoparticles is an effective approach to control the antibacterial properties of membranes towards Staphylococcus aureus. After carrying out in vivo experiments, we found that ferroelectric hybrid membranes, containing from five to ten mass percent of PVP, have the greatest wound-healing effect for the healing of purulent wound

Optoelectronic device of diagnosis of dysfunction of the esophagus

An original method for diagnosing esophageal peristaltic function using an optoelectronic device that operates on the principle of optical location is described. The scheme of operation and used methods are detailed, and effectiveness of the optoelectronic device for diagnosis of functional disorders of the esophagus is assessed

Optoelectronic device of diagnosis of dysfunction of the esophagus

An original method for diagnosing esophageal peristaltic function using an optoelectronic device that operates on the principle of optical location is described. The scheme of operation and used methods are detailed, and effectiveness of the optoelectronic device for diagnosis of functional disorders of the esophagus is assessed

Effects of infrared and ultraviolet radiation on the viability of cells immobilized in porous TiNi-based alloy scaffold

Сell responses to electromagnetic radiation are due to many factors including the cellular microenvironment. The aim of the present study was to explore the effects of ultraviolet (UV) and infrared (IR) irradiation of low intensity on cultured cells derived from different biological tissues (spleen, bone marrow, and Ehrlich's adenocarcinoma), which were immobilized in a porous TiNi-based alloy scaffold. Accordingly, the following objectives were set: i) to evaluate the impact of low-intensity radiation on cell suspensions, and ii) to carry out a comparative analysis of the viability of cells immobilized in porous TiNibased alloy and IR- and UV-irradiated. The data show that the extracellular environment of bone marrow, tumor and spleen cel