Article
Agronomy
Alexander Lisov, Oksana Belova, Anna Zavarzina, Andrey Konstantinov, Alexey Leontievsky
Summary: The biochemical stability of soil humus is crucial for soil quality, and fungi play a significant role in decomposing humic matter through oxidative enzymes. This study demonstrates that laccase produced by Mortierella elasson, a zygomycetous fungus, can effectively depolymerize humic acids in vitro. However, factors influencing laccase production in zygomycetes are still poorly understood.
Article
Engineering, Environmental
Bi-Cun Jiang, Ye-Chao Tian, Ai -Min Li, Yu-Ze Han, Ze-Tao Wu, Chang Lu, Hai-Ou Song, Rong Ji, Wen-Tao Li, Gregory V. Korshin
Summary: Electrochemical oxidation (EO) is an effective method for treating dissolved organic matter (DOM) in landfill leachate. The use of nonactive boron-doped diamond (BDD) anode has demonstrated the best performance for DOM oxidation. The decrease of Abs420 can be used as an indicator of the shift from the humic acid-like fraction (HA) to the proteinaceous biopolymer fraction (BP) during the EO treatment with BDD anode.
Article
Environmental Sciences
Manfei Lin, Jian Zhen Yu
Summary: The study reveals that oxidative potential (OP) in inhaled ambient fine particulate matter (PM2.5) is mainly caused by transition metals (TMs) and humic-like substances (HULIS), with water-soluble copper (Cu) in Hong Kong samples leading to higher OP than in Beijing samples. Cu is a dominant contributor to hydroxyl radical formation and ascorbic acid depletion, despite higher levels of water-soluble iron (Fe) present.
ENVIRONMENTAL POLLUTION
(2021)
Article
Chemistry, Multidisciplinary
P. Fourrier, G. Dulaquais, C. Guigue, P. Giamarchi, G. Sarthou, H. Whitby, R. Riso
Summary: This paper presents a multi-analytical approach to characterize marine dissolved organic matter (DOM). The concentration of dissolved organic carbon (DOC) in marine environments was determined using size exclusion chromatography (SEC) and validated with a certified reference material (CRM). The study used multi-detection SEC, fluorescence, and electrochemical methods to describe the size distribution spectra, composition, and chemical properties of marine DOM in the (ultra)oligotrophic West Tropical South Pacific Ocean (WTSP). The results indicate that the state of degradation of DOC varies with different size fractions, as operationally defined by SEC. The study estimates that approximately 62% of DOC in the WTSP is humic in nature (0.5-10 kDa) and around 9% is capable of forming complexes with trace elements such as iron (Fe).
Article
Limnology
Eero Asmala, Philippe Massicotte, Jacob Carstensen
Summary: The study analyzed dissolved organic matter (DOM) in the transition zone from freshwater to marine systems using a new approach, identifying different characteristics of CDOM in fresh and low-salinity marine waters, and extracting and classifying multiple peaks of DOM through Gaussian decomposition method, which are related to salinity.
LIMNOLOGY AND OCEANOGRAPHY
(2021)
Article
Soil Science
O. E. Trubetskaya, O. A. Trubetskoi
Summary: Three stable electrophoretic fractions A, B, and C + D were isolated from soil humic acids, with A and B showing a stimulatory effect on radish seedling growth at a low concentration of 10^(-3) mg/L, while C + D inhibited seed germination. Analysis suggests that the presence of aliphatic components in the humic acids is the main factor determining growth stimulation, while the aromatic components inhibit plant growth.
EURASIAN SOIL SCIENCE
(2021)
Article
Biochemistry & Molecular Biology
Mei Zhi, Yiying Zhao, Xinyu Zeng, Naga Raju Maddela, Yeyuan Xiao, Yucheng Chen, Ram Prasad, Zhongbo Zhou
Summary: This study investigated the composition of extracellular polymeric substances (EPS), microbial profiles, and functional genes of algae-bacteria aggregates in algae-bacteria symbiotic wastewater treatment. The results showed that solid retention times (SRTs) greatly influenced the nitrogen transformation and the formation and morphological structure of algae-bacteria aggregates. The study also revealed the importance of EPS structures and filamentous cyanobacteria in driving the aggregation of algae and bacteria.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2023)
Article
Environmental Sciences
Keke Xiao, Harald Horn, Gudrun Abbt-Braun
Summary: The role of humic substances in sludge treatment has been the focus of attention. Quantification and characterization of humic substances are crucial for understanding their role in different sludge treatment processes. However, the current methods for quantification of humic substances in sludge show overestimation and contradictory results.
Article
Food Science & Technology
Milena Stranska, Zbynek Dzuman, Nela Prusova, Adam Behner, Irena Kolouchova, Petra Lovecka, Tomas Rezanka, Miroslav Kolarik, Jana Hajslova
Summary: Fungal endophytes in grapevine have the potential to produce various mycotoxins, with verruculogen and gliotoxin being the most common and concentrated. It is important to carefully check the toxinogenic potential of endophytes when cultivating grapevines.
Article
Engineering, Chemical
Lindsay E. Anderson, Benjamin F. Trueman, Dewey W. Dunnington, Graham A. Gagnon
Summary: Brownification process in lakes is accompanied by increasing concentrations of iron and aluminum, leading to the formation of iron-rich (oxyhydr)oxides in the 1000 kDa fraction. The associations between DOM and primarily inorganic colloids, such as iron and aluminum, pose significant challenges for drinking water treatment systems in the region.
Review
Biology
Nuraly S. Akimbekov, Ilya Digel, Kuanysh T. Tastambek, Adel K. Marat, Moldir A. Turaliyeva, Gulzhan K. Kaiyrmanova
Summary: It was previously believed that coal sources are not suitable habitats for microorganisms due to their chemical nature. However, increasing evidence has shown the presence of diverse microbial groups in coal environments and their significant metabolic role. Coal degradation/conversion technology by native microorganisms has great potential in various industries and environmental rehabilitation.
Article
Energy & Fuels
Reza Shokoohi, Dostmorad Zafari, Mohammad Taghi Samadi, Seyed Amir Ghiasian, Mohammad Yousef Alikhani, Sara Mahdian, Mohammad Molla Mahmoudi
Summary: In this study, a filamentous fungus Penicillium rubens was isolated from sewage sludge and its effectiveness in enhancing sludge dewaterability was evaluated. The results showed that inoculating fungal mycelium into sterilized sludge significantly improved sludge dewaterability by reducing SRF and CST values. The degradation of extracellular polymeric substances by the fungal mycelium was responsible for the improved dewaterability. The treated sludge also exhibited reduced slime and loosely bound EPS. The CST and SRF of the fungal-treated sludge were positively correlated with S-EPS and LB-EPS.
BIOMASS CONVERSION AND BIOREFINERY
(2022)
Article
Environmental Sciences
Nan Jiang, Meng Wu, Guilong Li, Pengfa Li, Ming Liu, Zhongpei Li
Summary: This study found that humic acid can reduce the relative richness of potential phytopathogenic fungi in soil and negatively affect the aboveground biomass of cucumbers. Additionally, humic acid facilitates the growth of beneficial microbes and increases the complexity of the microbial network, leading to a decrease in the relative abundance of phytopathogenic fungi and an increase in cucumber growth.
LAND DEGRADATION & DEVELOPMENT
(2022)
Article
Chemistry, Multidisciplinary
Oliver Musl, Irina Sulaeva, Ivan Sumerskii, Arnulf Kai Mahler, Thomas Rosenau, Jana Falkenhagen, Antje Potthast
Summary: Lignosulfonates are industrial biorefinery products with significant variability and heterogeneity in their structural composition. This study utilizes a novel hydrophobic chromatography method to provide a comprehensive understanding of the characteristic composition of lignosulfonates and reveals significant differences in hydrophobic composition among different industrial lignosulfonates.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2021)
Article
Biochemistry & Molecular Biology
Wan Muhammad Ikram Wan Mohd Zamri, Fridelina Sjahrir, Nor Suhaila Yaacob, Noor Fazreen Dzulkafli, Mohd Fadzli Ahmad, Hasdianty Abdullah, Maegala Nallapan Maniyam, Emi Fazlina Hashim, Nobuyuki Kawasaki, Kazuhiro Komatsu, Victor S. Kuwahara
Summary: Assessing water-extractable organic matter using an autoclave provides valuable insights into soil physical, chemical, and biological changes. Extracts from Malaysian forest soils revealed higher levels of dissolved organic carbon, total dissolved nitrogen, total dissolved phosphorus, and ammonium-nitrate content under autoclave conditions. Soil extracts became slightly acidic with increased temperature and duration, with varying concentrations of fractions observed based on different extraction methods, suggesting potential applications in microbial studies.
Article
Environmental Sciences
Olga Yakimenko, Aliya Ziganshina, Vera Terekhova, Irina Panova, Marina Gladkova, Mikhail Timofeev, Alexander Yaroslavov
Summary: Interpolyelectrolyte complexes (IPECs) formed by two commercial polymers were found to be toxic to bacteria and ciliates, but less toxic to mammalian cells and higher plants. In soil matrices, the phytotoxicity of IPECs was found to be low.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Review
Soil Science
V. A. Terekhova
Summary: This article discusses the main approaches to using biotesting to assess the environmental risk of pollution, namely predictive and diagnostic methods. It analyzes the historical stages of ecotoxicology development and presents a variety of test systems and methods, as well as criteria for selecting test species. The article emphasizes the relevance of soil assessment based on the biotic concept and characterizes the advantages and disadvantages of certain methods and indices. Finally, it suggests an interdisciplinary approach, the TRIAD methodology, to integrate biotesting results into the overall assessment of soils.
EURASIAN SOIL SCIENCE
(2022)
Article
Optics
Anastasiia Kharcheva, Zinaida A. Charyshnikova, Nataliya E. Borisova, Tsagana B. Sumyanova, Oleg K. Farat, Dmitriy A. Kharitonov, Svetlana Patsaeva
Summary: The luminescence characteristics of a new water-soluble europium complex were studied, revealing the existence of different species of the complex in different pH environments. This finding has significant implications for the development of a multimodal pH sensor for aqueous environments.
JOURNAL OF LUMINESCENCE
(2022)
Article
Optics
Elena Fedoseeva, Svetlana Patsaeva, Devard Stom, Vera Terekhova
Summary: This study focuses on examining fluorescence proxies to distinguish chromophoric matter in different fungi. Amino acids, melanin-like compounds, NAD(P)H, and flavins were found to contribute to fungal autofluorescence. Protein fluorescence can be used to detect general microbial contamination. The combination of fluorescence spectra and principal component analysis algorithms can improve the detection capability of fungal contamination of aquatic environments.
Article
Optics
A. A. Zhiltsova, O. A. Filippova, E. D. Krasnova, D. A. Voronov, S. Patsaeva
Summary: The paper comprehensively describes three new methods for analyzing the photosynthetic pigment of BChl d in green sulfur bacteria using spectral measurements, and compares their applicability conditions, advantages, and limitations.
ATMOSPHERIC AND OCEANIC OPTICS
(2022)
Article
Energy & Fuels
Nataliya E. Borisova, Tsagana B. Sumyanova, Alexey V. Ivanov, Anastasia V. Kharcheva, Petr I. Matveev, Svetlana V. Patsaeva, Vladimir G. Petrov
Summary: This paper presents a new hybrid donor extractant ligand and analyzes its synthesis method and the structures of its complexes with metal ions. The research shows that this ligand can be used for the selective separation of americium from high-level waste imitator solutions.
Article
Optics
Yu. G. Sokolovskaya, E. D. Krasnova, D. A. Voronov, D. N. Matorin, A. A. Zhiltsova, S. V. Patsaeva
Summary: This study investigated optical proxies of euxinia in a meromictic lagoon on the White Sea shoreline and found that spectral methods have advantages in measuring dissolved organic matter and photosynthetic pigments in water.
Article
Agronomy
Konstantin Korsakov, Alexey Stepanov, Lev Pozdnyakov, Olga Yakimenko
Summary: The effects of three types of urea fertilizers on soil N transformation processes were examined in a laboratory experiment. It was found that humate-coated urea (U_HA) showed advantages in reducing N losses, increasing N-NH4 content, and decreasing N2O emissions compared to conventional urea. U_HA also promoted soil respiration and microbial activity, making it a promising tool for reducing N losses in soils.
Article
Ecology
V. A. Terekhova, E. Fedoseeva, V. D. Volkova, A. E. Ivanova, O. S. Yakimenko
Summary: This study evaluated the significance of melanin-containing fungi as indicators under different conditions and compared the effectiveness of two assessment methods. The results showed an increase in melanin-containing fungi in soils with heavy metal contamination and a noticeable effect of carbon nutrition on their proportion. The findings suggest that the microbiological inoculation method is more bioindicative and efficient in environmental monitoring than metagenomic sequencing.
THEORETICAL AND APPLIED ECOLOGY
(2022)
Article
Soil Science
O. S. Yakimenko, A. R. Ziganshina, A. A. Stepanov, I. G. Panova, A. A. Yaroslavov
Summary: The influence of polyelectrolyte-based soil conditioners on the qualitative and quantitative composition of soil organic matter (SOM) was studied for two soils. The study found that the effect of polyelectrolytes differs depending on the chemical nature and composition of polymers' functional groups and on the soil properties. Polyanionic polyelectrolyte promoted the mobilization of labile humic fractions, while polycationic polyelectrolyte was adsorbed in non-labile fractions.
EURASIAN SOIL SCIENCE
(2022)
Article
Ecology
E. V. Fedoseeva, A. P. Kiryushina, D. I. Stom, V. A. Terekhova
Summary: Heavy metals influence the resistance and antagonistic properties of soil fungi, with Alternaria alternata and Trichoderma viride showing high resistance to Cu and Pb cations. Differences in reaction patterns and sporulation stimulation were observed between the two species, with Trichoderma viride demonstrating pronounced antagonistic properties in environments containing heavy metals.
THEORETICAL AND APPLIED ECOLOGY
(2022)