A5043632087- Pesticide and Herbicide Environmental Studies
- Soil and Environmental Studies
- Enzyme-mediated dye degradation
- Agriculture and Biological Studies
- Plant Growth Enhancement Techniques
- Agricultural Productivity and Crop Improvement
- Food Industry and Aquatic Biology
- Isotope Analysis in Ecology
- Analytical chemistry methods development
- Pharmaceutical and Antibiotic Environmental Impacts
- Soil Carbon and Nitrogen Dynamics
- Diamond and Carbon-based Materials Research
- Environmental Toxicology and Ecotoxicology
- Plant responses to elevated CO2
- Biocrusts and Microbial Ecology
- Marine and coastal ecosystems
- Marine and environmental studies
- Nanoparticles: synthesis and applications
- Toxic Organic Pollutants Impact
- Humic Substances and Bio-Organic Studies
- Weed Control and Herbicide Applications
- Microbial Metabolism and Applications
- Plant Micronutrient Interactions and Effects
- Radioactive contamination and transfer
- Microbial Community Ecology and Physiology
Lomonosov Moscow State University
2016-2025
Moscow State University
2009-2024
Federal Center Research Fundamentals of Biotechnology
2016-2023
Russian Academy of Sciences
2009-2023
Volgograd State Agricultural University
2021-2022
All-Russian Scientific Research Institute for Irrigated Agriculture
2022
Peoples' Friendship University of Russia
2022
A N Bach Institute of Biochemistry
2010-2021
Orenburg State University
2019
Development Agency of Serbia
2014
Recorded molecular weights (MWs) for humic substances (HS) range from a few hundred to millions of daltons. For purposes defining HS as specific class chemical compounds, it is particular importance ascertain if this broad MWs can be attributed actual variability in properties or simply an artifact the analytical techniques used characterize HS. The main objectives study were (1) establish preferential exists and (2) determine any consistent MW To reach goal, we have undertaken approach...
Partition coefficients for the binding affinities of atrazine to 16 different humic materials were determined by ultrafiltration HPLC technique. Sources included acids (HA), fulvic (FA), and combined fractions (HF) from soil, peat, coal acid. Each was characterized elemental composition, molecular weight, composition main structural fragments 13C solution-state NMR. The magnitude KOC values varied 87 575 L/kg C, demonstrating relatively low affinity substances (HS) atrazine. On basis...
Eleven well characterized humic substances (HSs) were adsorbed from aqueous solution onto a Na‐kaolin clay. The adsorption affinity ( K L ), maximum capacity b coefficient of desorption hysteresis H and the concentration irreversibly HS (IHS) derived adsorption‐desorption isotherms. These parameters correlated with structural features HS. was shown to correlate directly aromaticity inversely their polarity, expressed as O/C atomic ratio. A dependency between polarity not confirmed. , IHS...
The goal of this study was to establish a relationship between the optical properties soil dissolved organic matter (DOM) and acidic functions carried out by its individual constituents. We obtained 12 fractions DOM samples using sequential solid phase extraction on nonionic sorbent at steadily lowered pH values: 7, 5, 3, 2, which correspond low bounds pKa values phenols, aliphatic, aromatic carboxylic acids, ketoacids. structural studies were conducted with use NMR selective...
Abstract Humic substances (HS) play important roles in the biotic-abiotic interactions of root plant and soil contributing to adaptation external environments. However, their mode action on plants remains largely unknown. In this study HS distribution tissues wheat seedlings was examined using tritium-labeled humic acid (HA) derived from leonardite (a variety lignites) microautoradiography (MAR). Preferential accumulation labeled products tritiated HA found roots as compared shoots...
Humic acids (HAs) possess diverse functionalities, endowing them with multiple applications as bioactive compounds in agriculture. Alkaline extraction is key to obtaining HAs from their source material. The presence of oxygen during can lead oxidative changes the humic structure. extent HA transformation depending on origin remains poorly understood, and effect alkaline biological activities yet be estimated. Here, we compare physicochemical properties extracted fresh organic material,...
The primary goal of this paper is to demonstrate potential strengths the use tritium-labeled humic substances (HS) quantify their interaction with living cells under various conditions. A novel approach was taken study between a model microorganism and labeled material. bacterium Escherichia coli used as microorganism. Salt stress interactions HS nonoptimum Six samples originating from coal, peat, soil were examined. To E. cells, bioconcentration factors (BCF) calculated amount that...
Availability of Fe in soil to plants is closely related the presence humic substances (HS). Still, systematic data on applicability iron-based nanomaterials stabilized with HS as a source for plant nutrition are missing. The goal our study was establish connection between properties materials by and their bioavailability plants. We have prepared two samples leonardite HS-stabilized substantially different using reported protocols studied physical chemical state relation iron uptake other...
The objective of this study was to shed light on structural features which underlay intensity long wave absorbance natural organic matter (NOM) using 1H NMR spectroscopy. For purpose, a set the NOM samples assembled from arctic and nonarctic sampling sites (the Kolyma river basin Moscow region, respectively). It ensure substantial difference in humification degree isolated matter—the biogeochemical proxy long-wave NOM. analyzed solution-state distribution both backbone exchangeable protons...
The objective of this study was to synthesize iron (hydr)oxide nanoparticles (IONPs) stabilized by humic substances, and estimate the feasibility their use for foliar application on deficient plants. IONPs were synthesized rapid hydrolysis iron(III) nitrate in a solution potassium humate. speciation nanoparticle morphologies characterized using X-ray diffraction, transmission electron microscopy, Mössbauer spectroscopy. obtained sample applied at concentrations 1- 10-mM Fe, 0.2% urea used as...
Humic substances (HS) are natural supramolecular systems of high- and low-molecular-weight compounds with distinct immunomodulatory protective properties. The key beneficial biological activity HS is their antioxidant activity. However, systematic studies the against biologically relevant peroxyl radicals still scarce. main objective this work was to estimate capacity (AOC) a broad set widely differing in structure using an oxygen radical absorption (ORAC) assay. For purpose, 25 samples...
Humic substances (HS) of different origins have been labeled with tritium by the thermal activation method. Specific radioactivity HS ( 3H-HS) was sufficiently high and varied from 0.14 to 0.6 TBq/g. Parent 3H-HS were analyzed size exclusion chromatography UV detection. The results allowed concluding that (1) neither partial decomposition nor polymerization occurred during labeling (2) molecules a regular distribution among fractions molecular weights. performed correlation analysis revealed...