Impact of the Naturally Driven Surfactant in EOR Application: Experimental, Microscopic, and Numerical Analyses.

While synthetic, conventional surfactants have a known negative environmental impact, their high cost poses a significant challenge. In contrast, naturally extracted surfactants are cheaper and are readily available. The applicability of natural surfactants depends on the saponin concentration, extraction, and synthesis methods.

Regulating Pathways of Adamalysin-like Metalloendopeptidase Expression.

The minor secreted proteinase of 3-19 MprBp classified as the unique bacillary adamalysin-like enzyme of the metzincin clan. The functional role of this metalloproteinase in the bacilli cells is not clear. Analysis of the regulatory region of the gene showed the presence of potential binding sites to the transcription regulatory factors Spo0A (sporulation) and DegU (biodegradation).

[Vascular endothelial growth factor in elderly and senile age: clinical and pathogenetic relationships.].

The aim of the study was to study the role of serum vascular endothelial growth factor and to determine its clinical significance in elderly and senile patients. The study included 124 people (40 men and 84 women) aged 60 to 89 years, the average age was 68,8±7,4 years. Serum levels of vascular endothelial growth factor (VEGF) were studied in the work; blood lipid spectrum parameters, indicators of acute phase blood proteins: C-reactive protein (C-RP), fibrinogen; glomerular filtration rate (GFR) according to the CKD-EPI formula based on serum creatinine and according to the F.

Carbonized Nickel Complex of Sodium Pectate as Catalyst for Proton-Exchange Membrane Fuel Cells.

Sodium pectate derivatives with 25% replacement of sodium ions with nickel ions were obtained by carbonization to temperatures of 280, 550, and 800 °C, under special protocols in an inert atmosphere by carbonization to temperatures of 280, 550, and 800 °C. The 25% substitution is the upper limit of substitution of sodium for nickel ions, above which the complexes are no longer soluble in water. It was established that the sample carburized to 550 °C is the most effective active element in the hydrogen-oxidation reaction, while the sample carbonized up to 800 °C was the most effective in the oxygen-reduction reaction.

[Inflammatory markers, lipid metabolism and renal functional state in young, middle, elderly and senior patients with high cardiovascular risk.].

With increasing age in the human body, various pathophysiological changes are observed in response to the effects of various factors, taking into account the genetic predisposition. Among the possible factors causing an increase in cardiovascular risk in the general population are the level of blood pressure, changes in lipid metabolism and inflammation markers, as well as the magnitude of the filtration function of the kidneys. This publication examined inflammatory markers, lipid metabolism, and renal function in 269 (136 males and 133 females) young, middle, elderly, and senile patients at high cardiovascular risk.