Droplet Microfluidic Method for Estimating the Dynamic Interfacial Tension of Ion-Crosslinked Sodium Alginate Microspheres.

The research focuses on optimizing the production of hydrogel microspheres using droplet microfluidics for pharmaceutical and bioengineering applications. A semiempirical method has been developed to predict the dynamic interfacial tension at the interface of . These microspheres are produced in a small-scale coaxial device that is manufactured using affordable DLP/LCD 3D printing technology with a transparent photopolymer.

Microgel Particle Collision with Smooth and Nanofiber Hydrophobic Surfaces during Three-Dimensional Printing of a Biopolymer Layer.

The impact of microgel particles onto a wall represents an elementary process that determines the one-stage production of a biopolymer layer on a nanofiber scaffold in the framework of tissue bioengineering. The formation of a microgel layer is experimentally examined on a hydrophobic uniform surface and a nonwoven polymer membrane made of vinylidene fluoride-tetrafluoroethylene copolymer. In-air microfluidics methods, namely, an external vibration disturbance on the microflow of a cross-linkable biopolymer, make it possible to form the microstructures of "beads-on-thread" with a uniform distance between microgel particles of identical size (340-480 μm, depending on the sample).

[Geriatric status of patients over 70 years of age with myocardial infarction and the relationship with the severity of myocardial stress, fibrosis and angiogenesis.].

A prospective study of 92 patients over 70 years old with myocardial infarction was carried out. All patients were diagnosed and determined the severity of geriatric syndromes, including fragility, using specialized scales on the 5th day of hospitalization. The comorbidity was assessed with the calculation of the Charlson Comorbidity Index, levels of NT-proBNP, ST-2, FGF-21, VEGF in blood serum by enzyme immunoassay.

[Psychophysiologic indices in evaluation of working capacity, fatigue and overstrain in seamen].

The authors have discussed the new conceptual neurophysiological model of genesis and pathogenesis of fatigue and overstrain in seamen. The complex phase character of the developing changes was revealed. Use of the complex of psychophysiological methods with consideration of neurophysiological nature of the changes detected allowed us to obtain the objective assessment concerning fatigue and overstrain in seamen.