Publications by authors named "Artemii Ivanov"

A strategy is reported for fabricating 3D-printed electrodes using self-assembled graphene oxide (GO) core-shell microspheres as tunable microreactors. This approach enables control over microsphere size and shell thickness via pH adjustment and sonication parameters, yielding either individual conductive particles or interconnected networks suitable for Direct Ink Writing. Following pyrolysis, the resulting hierarchically porous, rigid constructs exhibit surface area of 1000 m g and compressive strengths up to 9.

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The conversion of excess carbon dioxide (CO) into valuable chemicals is critical for achieving a sustainable society. Among various catalysts, molybdenum disulfide (MoS) has demonstrated potential for CO hydrogenation to methanol. However, its catalytic activity has yet to be fully optimized, and scalable, industrially viable production methods remain underdeveloped.

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The extraction of gold (Au) from electronic waste (e-waste) has both environmental impact and inherent value. Improper e-waste disposal poses environmental and health risks, entailing substantial remediation and healthcare costs. Large efforts are applied for the recovery of Au from e-waste using complex processes which include the dissolution of Au, its adsorption in an ionic state and succeeding reduction to metallic Au.

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, an Oomycete pathogen, has a devastating impact on potato agriculture, leading to the extensive use of chemical fungicides to prevent its outbreaks. Spraying double-stranded RNAs to suppress specific genes of the pathogen via the RNA interference (RNAi) pathway may provide an environmentally friendly alternative to chemicals. However, this novel approach will require various target genes and application strategies to be tested.

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RNA isolation from fungi and fungus-like organisms is not an easy task. Active endogenous RNases quickly hydrolyze RNA after the sample collection, and the thick cell wall prevents inhibitors from penetrating the cells. Therefore, the initial collection and grinding steps may be crucial for the total RNA isolation from the mycelium.

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Coacervation is a self-assembly strategy based on the complexation of polyelectrolytes, which is utilized in biomedicine and agriculture, as well as automotive and textile industries. In this paper, we developed a new approach to the on-demand periodic formation of polyelectrolyte complexes through a Liesegang-type hierarchical organization. Adjustment of reaction conditions allows us to assemble materials with a tunable spatiotemporal geometry and establish materials' production cycles with a regulated periodicity.

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The problem of isolating high-quality total RNA from intervertebral discs has no recognized solution yet. This is due to the extremely low content of live cells in the samples and the voluminous intercellular matrix. A variety of published protocols focused on isolating RNA from articular cartilage have recommended the use of expensive equipment, enzymatic matrix cleavage, or cell culture.

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We demonstrate that our bio-electrochemical platform facilitates the reduction of detection time from the 3-day period of the existing tests to 15 min. Machine learning and robotized bioanalytical platforms require the principles such as hydrogel-based actuators for fast and easy analysis of bioactive analytes. Bacteria are fragile and environmentally sensitive microorganisms that require a special environment to support their lifecycles during analytical tests.

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Article Synopsis
  • High biological activity of natural furocoumarins can lead to harmful side effects, like genotoxicity, making it important to develop safer semi-synthetic alternatives.
  • The researchers previously examined twenty-one modified furocoumarins to find alterations that reduce negative effects while keeping or improving their beneficial properties.
  • In this article, they focus on assessing the cytotoxic activity of these compounds, ranking them by severity, and using statistical analysis to identify the best modifications for future development.
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(Mont.) de Bary is one of the main pathogens in the agricultural sector. The most affected are the species, with the potato () and the tomato () being of great agricultural importance.

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Nowadays, polyelectrolytes play an essential role in the development of new materials. Their use allows creating new properties of materials and surfaces and vary them in a wide range. Basically, modern methods are divided into three areas-the process of layer-by-layer deposition, free-standing films, and hydrogels based on polyelectrolytes.

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Nowadays, information processing is based on semiconductor (e.g., silicon) devices.

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The hydrogels of the polyelectrolytes polyethylenimine and poly(acrylic acid) are used to form a thin-layer interface on the gallium-indium eutectic alloy's surface. The proposed method of gradually increasing the applied voltage reveals the possibility of formation of electronic components: diode, capacitor, resistor, and memristor. The components can be changed to each other many times.

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This work depicts an electrochemical hydrogel-eutectic gallium indium alloy interface for the detection of tick-borne encephalitis (TBE) virus. This interface allows recording of nonlinear current-voltage responses, depending on the composition of the hydrogel. The current-voltage data for the machine learning model are trained by a multilayer perceptron.

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