Assessment of the Action of Сold Helium Plasma on Metabolic and Physico-chemical Parameters of Rats Blood

The aim of this paper was to study the effect of cold helium plasma on the parameters of oxidative metabolism and crystallogenic activity of rat blood plasma. Material and methods: The experiment was performed on 20 male Wistar rats divided into control (n=10, without manipulation) and main (n=10) groups. Animals of the main group underwent a course, which included 10 daily procedures for processing a pre-epilated area of the back skin (area – 10% of the body surface) with a stream of helium cold plasma (duration – 1 min.). Upon completion of the course, the intensity of lipid peroxidation, total antioxidant activity, malon dialdehyde level and superoxide dismutase activity were determined in the blood of all rats, and crystallogenic properties were evaluated. The conjugation of potential shifts was carried out by correlation analysis. Results: It was found that cold helium plasma transforms oxidative metabolism of blood plasma and its crystallogenic properties, acting as an agent with moderate antioxidant properties and a stimulant of dehydration structuring. In this case, the antioxidant effect is realized, among other things, due to the activation of superoxide dismutase

Ultramicroporous Polyphenylenes via Diels–Alder Polycondensation Approach

Development of new microporous organic polymers attracts significant attention due to a wide scope of promising applications. In addition, the synthesis of soluble, non-crosslinking polymers of high surface area and uniform microporosity is very challenging, and the methods for soluble microporous polymers formation are rather limited. In this work, we report a new approach to construct porous polyphenylenes which employs the Diels–Alder polycondensation of multifunctional ethynyl-containing monomers of different spatial architecture with bis(cyclopentadienone)s. The resulting polymers were soluble in common organic solvents, and their structure and properties were assessed by NMR, TGA, DSC, and SEC studies. The polymers demonstrated a specific surface area up to 751 m2·g−1 and ultramicroporous (pore size ≤ 0.6 nm) structure. N2 and CO2 adsorption–desorption data revealed that porosity parameters, e.g., specific surface area and pore sizes, can be tuned selectively by varying the type of monomers and reaction conditions

Meta-CF₃-Substituted Analogues of the GFP Chromophore with Remarkable Solvatochromism

In this work, we have shown that the introduction of a trifluoromethyl group into the me-ta-position of arylidene imidazolones (GFP chromophore core) leads to a dramatic increase in their fluorescence in nonpolar and aprotic media. The presence of a pronounced solvent-dependent gradation of fluorescence intensity makes it possible to use these substances as fluorescent polarity sensors. In particular, we showed that one of the created compounds could be used for selective labeling of the endoplasmic reticulum of living cells