A Complex of Marine Geophysical Methods for Studying Gas Emission Process on the Arctic Shelf.

The Russian sector of the arctic shelf is the longest in the world. Quite a lot of places of massive discharge of bubble methane from the seabed into the water column and further into the atmosphere were found there. This natural phenomenon requires an extensive complex of geological, biological, geophysical, and chemical studies.

Effects of Daily Peat Smoke Exposure on Present and Next Generations.

This study aimed to follow the neurotoxic effect of peat smoke on adult outbred rats and its influence on central nervous system (CNS) parameters in first-generation offspring. Under experimental conditions, exposure to peat smoke was carried out on adult male Wistar rats for 24 h. After the end of the exposure, an open field test (OFT), electroencephalography (EEG), and histological analysis of the testes and brains of smoke-exposed males were performed, after which they were mated with intact females to obtain F1 offspring.

The Analysis of Acute and Subacute Toxicity of Silver Selenide Nanoparticles Encapsulated in Arabinogalactan Polymer Matrix.

The acute and subacute toxicity of a newly synthesized silver selenide nanoparticles encapsulated in a natural polymeric matrix of arabinogalactan study has been studied. The nanocomposite is a promising material for the design of diagnostic and therapeutic drugs. It can also be used for the preparation of fluorescent labels and in thermal oncotherapy.

Comparative Assessment of Silver Nanocomposites' Biological Effects on the Natural and Synthetic Matrix.

The aim of our investigation was to make a comparative assessment of the biological effects of silver nanoparticles encapsulated in a natural and synthetic polymer matrix. We carried out a comparative assessment of the biological effect of silver nanocomposites on natural (arabinogalactan) and synthetic (poly-1-vinyl-1,2,4-triazole) matrices. We used 144 three-month-old white outbred male rats, which were divided into six groups.

Alterations in CNS Functions and DNA Methylation in Rats after 24 h Exposure to Peat Smoke.

The use of a developed experimental model of a natural fire made it possible to assess the consequences of 24 h exposure to peat combustion products in albino rats. Peat smoke exposure leads to behavioral disturbances in rats, characterized by an increase in locomotor activity and an increased level of anxiety. Indicators of brain bioelectrical activity of the exposed animals supported the state of anxiety and psychoemotional stress.

Marine seabed litter in Siberian Arctic: A first attempt to assess.

The pollution of the Siberian Arctic seas bottom by anthropogenic debris is assessed for the first time based on the results of bottom trawl surveys conducted in the Chukchi, East Siberian, Laptev, and Kara seas in 2019. In the East Siberian Sea and the Laptev Sea, no seabed litter was detected. The debris on bottom and near bottom was found in the Kara and Chukchi seas only.

Paternal Biomass Smoke Exposure in Rats Produces Behavioral and Cognitive Alterations in the Offspring.

Particular concern at the present stage is the health effects of wildfires' smoke. The aim of the study was to determine the impact of paternal biomass-smoke exposure on offspring's behavior and cognitive abilities. Male rats were exposed to biomass smoke for four hours/day, five days/week, for four weeks.

Morphological transformations of native petroleum emulsions. I. Viscosity studies.

Emulsions of water in as-recovered native crude oils of diverse geographical origin evidently possess some common morphological features. At low volume fractions varphi of water, the viscosity behavior of emulsions is governed by the presence of flocculated clusters of water droplets, whereas characteristic tight gels, composed of visually monodisperse small droplets, are responsible for the viscosity anomaly at varphi approximately 0.4-0.