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Journal articles on the topic 'Biological oxidations of sulfur compounds'

Author: Grafiati

Published: 13 June 2023

Last updated: 31 July 2025

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1

Echizen, Honami, Eita Sasaki, and Kenjiro Hanaoka. "Recent Advances in Detection, Isolation, and Imaging Techniques for Sulfane Sulfur-Containing Biomolecules." Biomolecules 11, no. 11 (2021): 1553. http://dx.doi.org/10.3390/biom11111553.

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Hydrogen sulfide and its oxidation products are involved in many biological processes, and sulfane sulfur compounds, which contain sulfur atoms bonded to other sulfur atom(s), as found in hydropersulfides (R-S-SH), polysulfides (R-S-Sn-S-R), hydrogen polysulfides (H2Sn), etc., have attracted increasing interest. To characterize their physiological and pathophysiological roles, selective detection techniques are required. Classically, sulfane sulfur compounds can be detected by cyanolysis, involving nucleophilic attack by cyanide ion to cleave the sulfur–sulfur bonds. The generated thiocyanate

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Fdz-Polanco, F., M. Fdz-Polanco, N. Fernández, M. A. Urueña, P. A. García, and S. Villaverde. "Combining the biological nitrogen and sulfur cycles in anaerobic conditions." Water Science and Technology 44, no. 8 (2001): 77–84. http://dx.doi.org/10.2166/wst.2001.0469.

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The biochemical processes involved in the anaerobic degradation of carbon, nitrogen and sulfur compounds can be represented by an oxidation-reduction or electron donor-acceptor scheme. The theoretic values of Gibbs free energy (ΔG0) calculated from thermodynamic data indicate the feasibility of the reactions. The interactions C-S and C-N are well known but there is a lack of information about the interaction N-S. The anaerobic transformation of nitrates using reduced sulfur compounds can be explained considering that nitrate acts as electron acceptor while reduced sulfur compounds are the elec

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3

Abedinzadeh, Z. "Sulfur-centered reactive intermediates derived from the oxidation of sulfur compounds of biological interest." Canadian Journal of Physiology and Pharmacology 79, no. 2 (2001): 166–70. http://dx.doi.org/10.1139/y00-085.

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Sulphur compounds play a central role in the structure and activity of many vital systems. In the living cell, sulfur constitutes an essential part of the defense against oxidative damage and is transformed into a variety of sulfur free radical species. Many studies of the chemistry of sulfur-centered radicals using pulse radiolysis and photolysis techniques to detect and measure the kinetics of these radicals have been published and reviewed. This paper discusses the present state of research on the formation and reactivity of certain sulfur-centered radicals [RS·, RSS·, RS·+, (RSSR)·+] and t

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4

Albelda Berenguer, Magdalena, Mathilde Monachon, Clémentine Jacquet, et al. "Biological oxidation of sulfur compounds in artificially degraded wood." International Biodeterioration & Biodegradation 141 (July 2019): 62–70. http://dx.doi.org/10.1016/j.ibiod.2018.06.009.

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5

Francioso, Antonio, Alessia Baseggio Conrado, Luciana Mosca, and Mario Fontana. "Chemistry and Biochemistry of Sulfur Natural Compounds: Key Intermediates of Metabolism and Redox Biology." Oxidative Medicine and Cellular Longevity 2020 (September 29, 2020): 1–27. http://dx.doi.org/10.1155/2020/8294158.

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Sulfur contributes significantly to nature chemical diversity and thanks to its particular features allows fundamental biological reactions that no other element allows. Sulfur natural compounds are utilized by all living beings and depending on the function are distributed in the different kingdoms. It is no coincidence that marine organisms are one of the most important sources of sulfur natural products since most of the inorganic sulfur is metabolized in ocean environments where this element is abundant. Terrestrial organisms such as plants and microorganisms are also able to incorporate s

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Ibáñez, Ana, Sonia Garrido-Chamorro, Juan J. R. Coque, and Carlos Barreiro. "From Genes to Bioleaching: Unraveling Sulfur Metabolism in Acidithiobacillus Genus." Genes 14, no. 9 (2023): 1772. http://dx.doi.org/10.3390/genes14091772.

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Sulfur oxidation stands as a pivotal process within the Earth’s sulfur cycle, in which Acidithiobacillus species emerge as skillful sulfur-oxidizing bacteria. They are able to efficiently oxidize several reduced inorganic sulfur compounds (RISCs) under extreme conditions for their autotrophic growth. This unique characteristic has made these bacteria a useful tool in bioleaching and biological desulfurization applications. Extensive research has unraveled diverse sulfur metabolism pathways and their corresponding regulatory systems. The metabolic arsenal of the Acidithiobacillus genus includes

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Yuen, Pong Kau, and Cheng Man Diana Lau. "New approach for assigning mean oxidation number of carbons to organonitrogen and organosulfur compounds." Chemistry Teacher International 4, no. 1 (2021): 1–13. http://dx.doi.org/10.1515/cti-2021-0015.

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Abstract Organonitrogen and organosulfur compounds are abundant in the natural environment. To understand the biological redox pathways properly, it is important for learners to be able to count the oxidation number of organic carbons. However, the process of counting is not always easy. In addition, organonitrogen and organosulfur molecules are seldom studied. To compensate these problems, this paper explores the bond-dividing method, which can effectively determine the mean oxidation number of carbons of organonitrogen and organosulfur molecules. This method uses the cleavage of carbon-sulfu

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8

Egbujor, Melford Chuka, Maria Petrosino, Karim Zuhra, and Luciano Saso. "The Role of Organosulfur Compounds as Nrf2 Activators and Their Antioxidant Effects." Antioxidants 11, no. 7 (2022): 1255. http://dx.doi.org/10.3390/antiox11071255.

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Nuclear factor erythroid 2-related factor 2 (Nrf2) signaling has become a key pathway for cellular regulation against oxidative stress and inflammation, and therefore an attractive therapeutic target. Several organosulfur compounds are reportedly activators of the Nrf2 pathway. Organosulfur compounds constitute an important class of therapeutic agents in medicinal chemistry due to their ability to participate in biosynthesis, metabolism, cellular functions, and protection of cells from oxidative damage. Sulfur has distinctive chemical properties such as a large number of oxidation states and v

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9

Shiri, Lotfi, Arash Ghorbani-Choghamarani, and Mosstafa Kazemi. "S–S Bond Formation: Nanocatalysts in the Oxidative Coupling of Thiols." Australian Journal of Chemistry 70, no. 1 (2017): 9. http://dx.doi.org/10.1071/ch16318.

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Compounds containing sulfur–sulfur bonds (often called disulfides or more specifically disulfanes) are arguably one of the most valuable functional groups in organic synthetic chemistry. They exist extensively in nature, in which they exhibit important biological activities. Furthermore, a diverse range of natural and synthetic disulfides have been discovered that have many applications as pharmaceutical and agriculture chemicals as well as synthetic intermediates. Since thiols are commercially accessible or easily synthesizable materials and their choice as starting materials is widely report

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10

Ardón-Muñoz, Luis G., and Jeanne L. Bolliger. "Synthesis of Benzo[4,5]thiazolo[2,3-c][1,2,4]triazole Derivatives via C-H Bond Functionalization of Disulfide Intermediates." Molecules 27, no. 5 (2022): 1464. http://dx.doi.org/10.3390/molecules27051464.

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Many nitrogen- and sulfur-containing heterocyclic compounds exhibit biological activity. Among these heterocycles are benzo[4,5]thiazolo[2,3-c][1,2,4]triazoles for which two main synthetic approaches exist. Here we report a new synthetic protocol that allows the preparation of these tricyclic compounds via the oxidation of a mercaptophenyl moiety to its corresponding disulfide. Subsequent C-H bond functionalization is thought to enable an intramolecular ring closure, thus forming the desired benzo[4,5]thiazolo[2,3-c][1,2,4]triazole. This method combines a high functional group tolerance with s

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11

Dvořáková, M., I. Weingartová, J. Nevoral, D. Němeček, and T. Krejčová. "Garlic Sulfur Compounds Suppress Cancerogenesis and Oxidative Stress: a Review." Scientia Agriculturae Bohemica 46, no. 2 (2015): 65–72. http://dx.doi.org/10.1515/sab-2015-0018.

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Abstract Garlic has long been considered a food with many health benefits. Several studies have confirmed that sulfur compounds are responsible for the positive effects of garlic on organisms. Garlic acts as an antioxidant by increasing antioxidant enzyme activity, reducing reactive oxygen species generation, and protecting proteins and lipids from oxidation. Garlic suppresses carcinogenesis through several mechanisms: (1) it reduces oxidative stress, and therefore, prevents damage to DNA; (2) it induces apoptosis or cell cycle arrest in cancer cells; and (3) it modifies gene expression throug

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12

Stewart, Frank J. "Dissimilatory sulfur cycling in oxygen minimum zones: an emerging metagenomics perspective." Biochemical Society Transactions 39, no. 6 (2011): 1859–63. http://dx.doi.org/10.1042/bst20110708.

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Biological diversity in marine OMZs (oxygen minimum zones) is dominated by a complex community of bacteria and archaea whose anaerobic metabolisms mediate key steps in global nitrogen and carbon cycles. Molecular and physiological studies now confirm that OMZs also support diverse micro-organisms capable of utilizing inorganic sulfur compounds for energy metabolism. The present review focuses specifically on recent metagenomic data that have helped to identify the molecular basis for autotrophic sulfur oxidation with nitrate in the OMZ water column, as well as a cryptic role for heterotrophic

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Roman, Pawel, Martijn F. M. Bijmans, and Albert J. H. Janssen. "Quantification of individual polysulfides in lab-scale and full-scale desulfurisation bioreactors." Environmental Chemistry 11, no. 6 (2014): 702. http://dx.doi.org/10.1071/en14128.

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Environmental context Emission into the atmosphere of gaseous streams containing sulfur compounds, such as H2S and SOx, will lead to the unwanted formation of acid rain. In order to prevent this, biological processes can be employed to treat sulfur-containing gas streams. In this study, we describe a way to investigate the speciation of polysulfide anions in biodesulfurisation systems, which might enable further understanding and development of these processes. Abstract Environmental pollution caused by the combustion of fuel sources containing inorganic and organic sulfur compounds such as hy

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Rudelle, E. A., J. Vollertsen, T. Hvitved-Jacobsen, and A. H. Nielsen. "Kinetics of aerobic oxidation of volatile sulfur compounds in wastewater and biofilm from sewers." Water Science and Technology 68, no. 11 (2013): 2330–36. http://dx.doi.org/10.2166/wst.2013.471.

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Laboratory experiments were conducted to investigate the kinetics of aerobic chemical and biological oxidation of selected odorous volatile sulfur compounds (VSCs) by wastewater and biofilm from sewers. The VSCs included methyl mercaptan (MeSH), ethyl mercaptan (EtSH), dimethyl sulfide (DMS) and total inorganic sulfide, which have all been reported as the main constituents of foul sewer gas. Samples of wastewater and biofilm for the experiments were obtained from two locations that differed significantly with respect to the occurrence of VSCs. One location represented an odor hot-spot downstre

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15

Lin, Binle, R. Yamaguchi, M. Hosomi, and A. Murakami. "A new treatment process for photo-processing waste using a sulfur-oxidizing bacteria/granular activated carbon system followed by Fenton oxidation." Water Science and Technology 38, no. 4-5 (1998): 163–70. http://dx.doi.org/10.2166/wst.1998.0609.

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Establishing a treatment process for practical, economic disposal of photo-processing waste (PW) has become an urgent environmental concern under recently enacted provisions of the London Treaty. This paper describes a new, effective biological/chemical treatment process in which sulfur-oxidizing bacteria (SOB) is used in conjunction with granular activated carbon (GAC), i.e., an aerobic SOB/GAC system, to treat PW prior to Fenton oxidation. Weak dilution PW was treated in a long-term (98 d) continuous treatment such that mass-reduced sulfur compounds were completely oxidized to sulfate, while

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16

Tomkiel, Aneta M., Dorota Czajkowska-Szczykowska, Ewa Olchowik-Grabarek, Lucie Rárová, Szymon Sękowski, and Jacek W. Morzycki. "A Study on the Chemistry and Biological Activity of 26-Sulfur Analogs of Diosgenin: Synthesis of 26-Thiodiosgenin S-Mono- and Dioxides, and Their Alkyl Derivatives." Molecules 28, no. 1 (2022): 189. http://dx.doi.org/10.3390/molecules28010189.

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A chemoselective procedure for MCPBA oxidation of 26-thiodiosgenin to corresponding sulfoxides and sulfone was elaborated. An unusual equilibration of sulfoxides in solution was observed. Moreover, α-alkylation of sulfoxide and sulfone was investigated. Finally, the biological activity of obtained compounds was examined.

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17

Moroz, O. M., S. O. Hnatush, O. V. Tarabas, C. I. Bohoslavets, G. V. Yavorska, and B. M. Borsukevych. "Sulfidogenic activity of sulfate and sulfur reducing bacteria under the influence of metal compounds." Biosystems Diversity 26, no. 1 (2018): 3–10. http://dx.doi.org/10.15421/011801.

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Due to their high content in natural environments, heavy metals exhibit toxic effects on living organisms, which leads to a decrease in the biological diversity and productivity of ecosystems. In niches with low oxidation reducing potential, sulfate and sulfur reducing bacteria carry out the reducing transformation of oxidized sulfur compounds with the formation of significant amounts of hydrogen sulfide. H2S produced by bacteria interacts with metal ions, precipitating them in the form of sulfides. The aim of this work was to investigate the influence of lead, cuprum (II), iron (II) and manga

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18

Smolyaninov, I. V., D. A. Burmistrova, N. P. Pomortseva, et al. "Triphenylphosphine Thiolate Gold(I) Complexes with Redox-Active Schiff Bases: Synthesis, Electrochemical Properties, and Biological Activity." Координационная химия 49, no. 9 (2023): 565–81. http://dx.doi.org/10.31857/s0132344x23600121.

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New gold(I) phosphine thiolate complexes [(Ph3P)Au(SLn)] I–V with Schiff bases LnSH containingredox-active catechol, phenol, or quinone methide moieties were synthesized and characterized. Themolecular structure of compound I in the crystalline state was established by X-ray diffraction (CCDCno. 2237815). The electrochemical behavior of compounds I–V was studieв by cyclic voltammetry. The proposedelectrooxidation mechanism of the complexes involves the Au–S bond cleavage, the disulfide formation,as well as the oxidation of the redox active group of the ligand. In the cathode region, complexes

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19

Pehlivan, Özge, Mateusz Waliczek, Monika Kijewska, and Piotr Stefanowicz. "Selenium in Peptide Chemistry." Molecules 28, no. 7 (2023): 3198. http://dx.doi.org/10.3390/molecules28073198.

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In recent years, researchers have been exploring the potential of incorporating selenium into peptides, as this element possesses unique properties that can enhance the reactivity of these compounds. Selenium is a non-metallic element that has a similar electronic configuration to sulfur. However, due to its larger atomic size and lower electronegativity, it is more nucleophilic than sulfur. This property makes selenium more reactive toward electrophiles. One of the most significant differences between selenium and sulfur is the dissociation of the Se-H bond. The Se-H bond is more easily disso

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20

Xie, Tiantian, Qi Wu, Han Lu, et al. "Functional Perspective of Leeks: Active Components, Health Benefits and Action Mechanisms." Foods 12, no. 17 (2023): 3225. http://dx.doi.org/10.3390/foods12173225.

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Leek (Allium fistulosum L.), a common and widely used food ingredient, is a traditional medicine used in Asia to treat a variety of diseases. Leeks contain a variety of bioactive substances, including sulfur compounds, dietary fiber, steroid compounds and flavonoid compounds. Many studies have shown that these active ingredients produce the following effects: promotion of blood circulation, lowering of cholesterol, relief of fatigue, anti-inflammation, anti-bacteria, regulation of cell metabolism, anti-cancer, anti-oxidation, and the lowering of fat and blood sugar levels. In this paper, the m

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Milet, G. M. D., and S. J. B. Duff. "Treatment of kraft condensates in a feedback-controlled sequencing batch reactor." Water Science and Technology 38, no. 4-5 (1998): 263–71. http://dx.doi.org/10.2166/wst.1998.0642.

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A feedback-controlled sequencing batch reactor was used to treat kraft accumulator and evaporator condensates. The control strategy used the level of dissolved oxygen to terminate the oxidation phase and commence the settling phase of each cycle. The duration of the oxidation phase was automatically adjusted to achieve 100% removal of methanol, the major carbon source in the condensates. While the treatment rate varied substantially in response to influent variability, the overall level of treatment remained constant, averaging 88±5% and 64±2% COD removal for the accumulator and evaporator con

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22

Labischinski, Harald, Dieter Naumann, Gerhard Barnickel, et al. "Comparison between the Molecular and Crystal Structures of a Benzylpenicillin Ester and its Corresponding Sulfoxide with Drastically Reduced Biological Activity." Zeitschrift für Naturforschung B 42, no. 3 (1987): 367–75. http://dx.doi.org/10.1515/znb-1987-0320.

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A comparative X-ray structure determination was performed to elucidate possible conformational differences between penicillins and penicillin sulfoxides. Penicillin-G-acetoxy-methylester and its β-oxide were used as model substances, because the only chemical difference between both compounds resides in the thiazolidine ring sulfur oxidation. On the basis of the X-ray data as well as of infrared measurements it is discussed that the drastically reduced biological activity of the penicillin-G-sulfoxide might be related to conformational differences in thiazolidine ring puckering or, even more s

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23

Tm, Kaplaushenko, Panasenko Oi, and Kucheryavy Yu. "RESEARCH OF THE SYNTHETIC, PHYSICAL AND CHEMICAL PROPERTIES OF 3-ALKYLSULFONYL-5-(CHINOLINE-2-YL, 2-HYDROXYCHINOLINE-4-YL)-4-R -2,4-DIHYDRO3N-1,2,4-TRIAZOLES 1." Asian Journal of Pharmaceutical and Clinical Research 10, no. 1 (2016): 81. http://dx.doi.org/10.22159/ajpcr.2017.v10i1.14096.

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ABSTRACTObjective: Fundamental research in pharmacy and medicine have shown that drugs, which are based on nucleus of the 1,2,4-triazole, have a widerange of biological effects. Derivatives of this heterocyclic system have well-known Ukrainian clinicians and the world scientists due to its antifungal,antidepressant, anticancer, cardio- and hepatoprotective properties. The pharmacological activity of most organic compounds depends on severaldifferent factors, including bioavailability of the substance. Hence, it is very important to consider the results of the synthetic and biological researche

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24

Higuchi, Ohki, Koutaro Tateshita, and Hiroyuki Nishimura. "Antioxidative Activity of Sulfur-Containing Compounds inAlliumSpecies for Human Low-Density Lipoprotein (LDL) Oxidation in Vitro." Journal of Agricultural and Food Chemistry 51, no. 24 (2003): 7208–14. http://dx.doi.org/10.1021/jf034294u.

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25

Janik-Hazuka, Małgorzata, Kamil Kamiński, Marta Kaczor-Kamińska, et al. "Hyaluronic Acid-Based Nanocapsules as Efficient Delivery Systems of Garlic Oil Active Components with Anticancer Activity." Nanomaterials 11, no. 5 (2021): 1354. http://dx.doi.org/10.3390/nano11051354.

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Diallyl disulfide (DADS) and diallyl trisulfide (DATS) are garlic oil compounds exhibiting beneficial healthy properties including anticancer action. However, these compounds are sparingly water-soluble with a limited stability that may imply damage to blood vessels or cells after administration. Thus, their encapsulation in the oil-core nanocapsules based on a derivative of hyaluronic acid was investigated here as a way of protecting against oxidation and undesired interactions with blood and digestive track components. The nuclear magnetic resonance (1H NMR) technique was used to follow the

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26

Fan, Xuetong, Christopher H. Sommers, and Kimberly J. B. Sokorai. "Ionizing Radiation and Antioxidants Affect Volatile Sulfur Compounds, Lipid Oxidation, and Color of Ready-to-Eat Turkey Bologna." Journal of Agricultural and Food Chemistry 52, no. 11 (2004): 3509–15. http://dx.doi.org/10.1021/jf035357b.

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Luo, Huiyu, Junbin Chen, Chuhong Su, and Longying Zha. "Advances in the Bioactivities of Phytochemical Saponins in the Prevention and Treatment of Atherosclerosis." Nutrients 14, no. 23 (2022): 4998. http://dx.doi.org/10.3390/nu14234998.

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Atherosclerosis (AS) is a chronic inflammatory disease characterized by hardening and narrowing of arteries. AS leads to a number of arteriosclerotic vascular diseases including cardiovascular diseases, cerebrovascular disease and peripheral artery disease, which pose a big threat to human health. Phytochemicals are a variety of intermediate or terminal low molecular weight secondary metabolites produced during plant energy metabolism. Phytochemicals from plant foods (vegetables, fruits, whole grains) and traditional herb plants have been shown to exhibit multiple bioactivities which are benef

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Beinart, R. A., A. Gartman, J. G. Sanders, G. W. Luther, and P. R. Girguis. "The uptake and excretion of partially oxidized sulfur expands the repertoire of energy resources metabolized by hydrothermal vent symbioses." Proceedings of the Royal Society B: Biological Sciences 282, no. 1806 (2015): 20142811. http://dx.doi.org/10.1098/rspb.2014.2811.

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Symbiotic associations between animals and chemoautotrophic bacteria crowd around hydrothermal vents. In these associations, symbiotic bacteria use chemical reductants from venting fluid for the energy to support autotrophy, providing primary nutrition for the host. At vents along the Eastern Lau Spreading Center, the partially oxidized sulfur compounds (POSCs) thiosulfate and polysulfide have been detected in and around animal communities but away from venting fluid. The use of POSCs for autotrophy, as an alternative to the chemical substrates in venting fluid, could mitigate competition in t

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Schippers, Axel, and Dagmar Kock. "Geomicrobiology of Sulfidic Mine Dumps: A Short Review." Advanced Materials Research 71-73 (May 2009): 37–41. http://dx.doi.org/10.4028/www.scientific.net/amr.71-73.37.

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The geomicrobiology of sulfidic mine dumps is reviewed. More than 30 microbiological studies of sulfidic mine dumps have been published. Mainly culturing approaches such as most probable number (MPN) or agar plates were used to study the microbial communities. More recently, molecular biological techniques such as FISH, CARD-FISH, Q-PCR, T-RFLP, DGGE, or cloning have been applied to quantify microorganisms and to investigate the microbial diversity. Aerobic Fe(II)- and sulfur compound oxidizing microorganisms oxidize pyrite, pyrrhotite and other metal sulfides and play an important role in the

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Khabibrakhmanova, Alsu M., Roza G. Faizova, Olga A. Lodochnikova, et al. "The Novel Chiral 2(5H)-Furanone Sulfones Possessing Terpene Moiety: Synthesis and Biological Activity." Molecules 28, no. 6 (2023): 2543. http://dx.doi.org/10.3390/molecules28062543.

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Over the past decades, 2(5H)-furanone derivatives have been extensively studied because of their promising ability to prevent the biofilm formation by various pathogenic bacteria. Here, we report the synthesis of a series of optically active sulfur-containing 2(5H)-furanone derivatives and characterize their biological activity. Novel thioethers were obtained by an interaction of stereochemically pure 5-(l)-menthyloxy- or 5-(l)-bornyloxy-2(5H)-furanones with aromatic thiols under basic conditions. Subsequent thioethers oxidation by an excess of hydrogen peroxide in acetic acid resulted in the

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Gureeva, Maria V., Maria S. Muntyan, Nikolai V. Ravin, and Margarita Yu Grabovich. "Wastewater Treatment with Bacterial Representatives of the Thiothrix Morphotype." International Journal of Molecular Sciences 25, no. 16 (2024): 9093. http://dx.doi.org/10.3390/ijms25169093.

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Bacteria of the Thiothrix morphotype, comprising the genera Thiothrix, Thiolinea and Thiofilum, are frequently encountered in domestic and industrial wastewater treatment systems, but they are usually not clearly differentiated due to the marked similarity in their morphologies. Methods ranging from light microscopy, FISH and PCR to modern high-throughput sequencing are used to identify them. The development of these bacteria in wastewater treatment systems has both advantages and disadvantages. On the one hand, the explosive growth of these bacteria can lead to activated sludge bulking or clo

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Jang, Sehyun, Ki-Tae Park, Kitack Lee, et al. "Large seasonal and interannual variations of biogenic sulfur compounds in the Arctic atmosphere (Svalbard; 78.9° N, 11.9° E)." Atmospheric Chemistry and Physics 21, no. 12 (2021): 9761–77. http://dx.doi.org/10.5194/acp-21-9761-2021.

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Abstract. Seasonal to interannual variations in the concentrations of sulfur aerosols (< 2.5 µm in diameter; non sea-salt sulfate: NSS-SO42-; anthropogenic sulfate: Anth-SO42-; biogenic sulfate: Bio-SO42-; methanesulfonic acid: MSA) in the Arctic atmosphere were investigated using measurements of the chemical composition of aerosols collected at Ny-Ålesund, Svalbard (78.9∘ N, 11.9∘ E) from 2015 to 2019. In all measurement years the concentration of NSS-SO42- was highest during the pre-bloom period and rapidly decreased towards summer. During the pre-bloom period we found a strong correlatio

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Tarasenko, Dmytro, Andrii Chumak, Oleksii Kolomoitsev, Volodymyr Kotlyar, and Andrey Doroshenko. "New 2-thiazol-5-yl-benzimidazoles: synthesis and determining of their potential as chemosensor reagents for polyvalent metal ions." Kharkov University Bulletin Chemical Series, no. 39 (October 12, 2022): 38–44. http://dx.doi.org/10.26565/2220-637x-2022-39-04.

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Thiabendazole and its analogues are widely used and reasonably well studied in terms of their biological activity, while their potential as chemosensory compounds with optical detection and sensitivity to metal ions remains unexplored. On the other hand, the introduction of a thiazole ring into the heteroaromatic system of benzimidazole significantly expands the directions of practical application of benzimidazole derivatives. Thus, one of the important structural features of the benzimidazole-thiazole system is the presence of a chelate cavity. It is a potential center of complexation with me

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Dotsenko, Victor V., Nawras T. Jassim, Azamat Z. Temerdashev, Zainab R. Abdul-Hussein, Nicolai A. Aksenov, and Inna V. Aksenova. "New 6′-Amino-5′-cyano-2-oxo-1,2-dihydro-1′H-spiro[indole-3,4′-pyridine]-3′-carboxamides: Synthesis, Reactions, Molecular Docking Studies and Biological Activity." Molecules 28, no. 7 (2023): 3161. http://dx.doi.org/10.3390/molecules28073161.

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The purpose of this work was to prepare new isatin- and monothiomalondiamide-based indole derivatives, as well as to study the properties of the new compounds. The four-component reaction of 5-R-isatins (R = H, CH3), malononitrile, monothiomalonamide (3-amino-3-thioxo- propanamide) and triethylamine in hot EtOH yields a mixture of isomeric triethylammonium 6′-amino-3′-(aminocarbonyl)-5′-cyano-2-oxo-1,2-dihydro-1′H- and 6′-amino-3′-(aminocarbonyl)- 5′-cyano-2-oxo-1,2-dihydro-3′H-spiro[indole-3,4′-pyridine]-2′-thiolates. The reactivity and structure of the products was studied. We found that oxi

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Duoandicoechea, Unai, Elisabeth Bilbao-García, and Natalia Villota. "Kinetic Modeling of Sulfamethoxazole Degradation by Photo-Fenton: Tracking Color Development and Iron Complex Formation for Enhanced Bioremediation." Applied Sciences 15, no. 8 (2025): 4531. https://doi.org/10.3390/app15084531.

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This study presents a comprehensive kinetic analysis of sulfamethoxazole (SMX) degradation by the photo-Fenton process, highlighting its potential for removing emerging micropollutants in water treatment. The degradation of SMX followed pseudo-first-order kinetics, with increasing Fe(II) concentrations significantly accelerating the oxidation rate. A kinetic model was developed to describe SMX removal, aromaticity loss, and color changes during treatment. Although SMX was rapidly eliminated, intermediate aromatic and chromophoric compounds persisted, requiring extended reaction times for compl

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Skaff, Ojia, David I. Pattison, Philip E. Morgan, et al. "Selenium-containing amino acids are targets for myeloperoxidase-derived hypothiocyanous acid: determination of absolute rate constants and implications for biological damage." Biochemical Journal 441, no. 1 (2011): 305–16. http://dx.doi.org/10.1042/bj20101762.

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Elevated MPO (myeloperoxidase) levels are associated with multiple human inflammatory pathologies. MPO catalyses the oxidation of Cl−, Br− and SCN− by H2O2 to generate the powerful oxidants hypochlorous acid (HOCl), hypobromous acid (HOBr) and hypothiocyanous acid (HOSCN) respectively. These species are antibacterial agents, but misplaced or excessive production is implicated in tissue damage at sites of inflammation. Unlike HOCl and HOBr, which react with multiple targets, HOSCN targets cysteine residues with considerable selectivity. In the light of this reactivity, we hypothesized that Sec

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Arshad, Mohammed F., Aftab Alam, Abdullah Ayed Alshammari, et al. "Thiazole: A Versatile Standalone Moiety Contributing to the Development of Various Drugs and Biologically Active Agents." Molecules 27, no. 13 (2022): 3994. http://dx.doi.org/10.3390/molecules27133994.

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For many decades, the thiazole moiety has been an important heterocycle in the world of chemistry. The thiazole ring consists of sulfur and nitrogen in such a fashion that the pi (π) electrons are free to move from one bond to other bonds rendering aromatic ring properties. On account of its aromaticity, the ring has many reactive positions where donor–acceptor, nucleophilic, oxidation reactions, etc., may take place. Molecules containing a thiazole ring, when entering physiological systems, behave unpredictably and reset the system differently. These molecules may activate/stop the biochemica

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Tuin, B. J. W., and A. A. C. M. Bos. "Ozone treatment and biodegradation of industrial wastewater containing thioethers." Water Science and Technology 49, no. 4 (2004): 279–85. http://dx.doi.org/10.2166/wst.2004.0284.

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Wastewater from an Akzo Nobel production site contains refractory sulfur components (cyclic thioethers). These components end up in the effluent of the existing biological wastewater treatment plant. The possibilities of (partial) oxidation and increasing biodegradability by ozone treatment for these types of compounds have been investigated. Ozonation experiments were carried out at laboratory scale, varying pH, temperature and catalysts. Biodegradability was evaluated from BOD measurements and BOD/COD ratios. Ozonation experiments at pH = 10 without catalyst addition or heating were found to

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Huergo, J., C. Bernardelli, M. Viera, Wolfgang Sand, and Edgardo R. Donati. "FISH Analysis of Bacterial Attachment to Copper Sulfides in Bioleaching Processes." Advanced Materials Research 71-73 (May 2009): 329–32. http://dx.doi.org/10.4028/www.scientific.net/amr.71-73.329.

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Bioleaching is the biological conversion of an insoluble metal compound into a water soluble form. In this process metal sulfides are oxidized to metal ions and sulfate by acidophilic microorganisms capable of oxidizing Fe2+ and/or sulfur-compounds. The metal solubilization from sulfide minerals is a chemical process which requires Fe3+ reduction. It is an environmentally friendly technique and an economical method for recovering metals that requires low investment and operation costs. In this work we studied the bioleaching of two kinds of acid-soluble copper sulfides, one easily leached by m

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Rathnayake, Rathnayake Mudiyanselage Kumuditha Anjala, and Jordi Cabana. "Operando X-Ray Absorption Spectroscopy Investigation of Molybdenum (IV) Oxo Benzene 1,2 Dithiolate [Mo^IV O(bdt)₂] ^2- Electrocatalyst Toward Oxygen Atom Transfer Reaction." ECS Meeting Abstracts MA2024-02, no. 60 (2024): 4081. https://doi.org/10.1149/ma2024-02604081mtgabs.

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Electrocatalytic Oxygen Atom Transfer (E-OAT) reactions are vital in chemical manufacturing, notably in fields such as pharmaceuticals. Inspired by the efficiency of Molybdoenzymes in oxygen atom transfer within biological systems, various Molybdenum compounds have been synthesized to understand chemical oxygen atom transfer. This study employed a bio-inspired Molybdenum(IV) oxo benzene 1,2 dithiolate [MoIV O(bdt)2]2- catalyst for E-OAT, utilizing Triphenylphosphine (PPh3) as the substrate and water as the oxygen donor. Notably, a significant enhancement was achieved, with a 46% conversion of

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Efimova, I. V., O. V. Smirnova, and T. G. Shendrik. "Antioxidant properties of brown coal humic substances." Naukovyi Visnyk Natsionalnoho Hirnychoho Universytetu, no. 3 (June 30, 2024): 116–21. http://dx.doi.org/10.33271/nvngu/2024-3/116.

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Humic substances (HS) belong to a fairly common class of organic compounds in nature, which are a component of soils, peat, lignite and sapropels. Some properties of humates (salts of humic acids) make it possible to use them in various fields – crop production, animal production, well drilling and soil structuring. The biological and chemical activity of humic substances is well known. It is caused by the presence of such functional groups as carboxyl, hydroxyl, carbonyl, nitrogen- and sulfur-containing in the composition of GR macromolecules. This fact also serves as a basis for a more exten

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Raoufi, Homayoon, Shirullah Taqwa, Lialoma Fahim Rahimi, and Gulaqa Anwari. "Acid Rain Formation and Its Direct Impacts on Plants: Wheat and Rice." International Journal of Social Science Research and Review 6, no. 6 (2023): 799–810. http://dx.doi.org/10.47814/ijssrr.v6i6.1446.

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Acid rain is a serious environmental problem that occurs in many places around the world. Acid deposition can form as a result of the oxidation of sulfur dioxide and nitrogen oxide gases that are released into the atmosphere. These gases (SO2, NOx) are the primary causes of acid rain, and physically and chemically react with water, oxygen, and other chemicals to form other acidic compounds such as sulfuric acid (H2SO4) and nitric acid (HNO3). Acid rain can form in the presence of ozone and carbon dioxide as well. Sulfuric acid (H2SO4) and nitric acid (HNO3) affect biological systems like plant

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Saunders, Jaclyn K., Clara A. Fuchsman, Cedar McKay, and Gabrielle Rocap. "Complete arsenic-based respiratory cycle in the marine microbial communities of pelagic oxygen-deficient zones." Proceedings of the National Academy of Sciences 116, no. 20 (2019): 9925–30. http://dx.doi.org/10.1073/pnas.1818349116.

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Microbial capacity to metabolize arsenic is ancient, arising in response to its pervasive presence in the environment, which was largely in the form of As(III) in the early anoxic ocean. Many biological arsenic transformations are aimed at mitigating toxicity; however, some microorganisms can respire compounds of this redox-sensitive element to reap energetic gains. In several modern anoxic marine systems concentrations of As(V) are higher relative to As(III) than what would be expected from the thermodynamic equilibrium, but the mechanism for this discrepancy has remained unknown. Here we pre

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Thomas, Adam E., Hayley S. Glicker, Alex B. Guenther, et al. "Seasonal investigation of ultrafine-particle organic composition in an eastern Amazonian rainforest." Atmospheric Chemistry and Physics 25, no. 2 (2025): 959–77. https://doi.org/10.5194/acp-25-959-2025.

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Abstract. Reports on the composition of ultrafine particles (<100 nm in diameter) in the Amazon are scarce, due in part to the fact that new-particle formation has rarely been observed near ground level. Ultrafine particles near the surface have nevertheless been observed, leaving open questions regarding the sources and chemistry of their formation and growth, particularly as these vary across seasons. Here, we present measurements of the composition of ultrafine particles collected in the Tapajós National Forest (2.857° S, 54.959° W) during three different seasonal periods: 10–30 Septembe

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Jan, C., J.M. Petersen, J. Werner, et al. "The gill chamber epibiosis of deep-sea shrimp Rimicaris exoculata: an in-depth metagenomic investigation and discovery of Zetaproteobacteria." Environmental Microbiology 16, no. 9 (2014): 2723–38. https://doi.org/10.1111/1462-2920.12406.

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The gill chamber of deep-sea hydrothermal vent shrimp <em>R</em><em>imicaris exoculata</em> hosts a dense community of epibiotic bacteria dominated by filamentous <em>E</em><em>psilonproteobacteria</em> and <em>G</em><em>ammaproteobacteria</em>. Using metagenomics on shrimp from the Rainbow hydrothermal vent field, we showed that both epibiont groups have the potential to grow autotrophically and oxidize reduced sulfur compounds or hydrogen with oxygen or nitrate. For carbon fixation, the <em>E</em><em>psilonproteobacteria </em>use the reductive tricarboxylic acid cycle, whereas the <em>G</em>

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Pakhorukov, Ivan, and Olga Eremchenko. "Dynamics of acid-base and redox conditions in alluvial technogenically saline soils of the taiga forest zone." АгроЭкоИнфо 4, no. 58 (2023): 14. http://dx.doi.org/10.51419/202134414.

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The alluvial technogenically saline soils on the territory of the Verkhnekamsk salt deposit in the Perm Region were examined. It was found that in the studied part of the valleys of small rivers, alluvial saline soils occupy tens of hectares. During the summer-autumn observation period in alluvial humus gley saline saturated soil (Gleyic Fluvisol (Loamic, Salic)) at a depth of 10-40 cm, reducing conditions prevailed (Eh from +200 mV to -250 mV), favoring the biochemical recovery of iron and sulfur. The reaction of the soil medium ranged from 6,5–7,8 pH. In alluvial gley salt marsh unsaturated

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Nasir, H. M., T. A. Saki, and M. Y. Al-Luaibi. "Synthesis, identification and thermal study of some new inorganic polymers based on bis-dithiocarbamate ligands with silicone, tellurium and some transition metals." Innovaciencia Facultad de Ciencias Exactas Físicas y Naturales 7, no. 1 (2019): 1–13. http://dx.doi.org/10.15649/2346075x.507.

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Introduction: In recent years, there has been considerable interest in dithiocarbamate complexes because of its diverse biological roles, very few reports have been made on polymeric bis- dithiocarbamate compounds with carbon chain of n-propyl or hexamethelene with transition metals in addition of the absence of any report of organosilicone or tellurium halides with such compounds Our interest in this report based on the preparation of new series of polymers with an expected activity as a fungi side compounds followed by the using of prepared amino compound as a hardners for epoxy paints Mater

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Gałązka, Anna, Anna Marzec-Grządziel, Milan Varsadiya, et al. "Biodiversity and Metabolic Potential of Bacteria in Bulk Soil from the Peri-Root Zone of Black Alder (Alnus glutinosa), Silver Birch (Betula pendula) and Scots Pine (Pinus sylvestris)." International Journal of Molecular Sciences 23, no. 5 (2022): 2633. http://dx.doi.org/10.3390/ijms23052633.

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The formation of specific features of forest habitats is determined by the physical, chemical, and biological properties of the soil. The aim of the study was to determine the structural and functional biodiversity of soil microorganisms inhabiting the bulk soil from the peri-root zone of three tree species: Alnus glutinosa, Betula pendula, and Pinus sylvestris. Soil samples were collected from a semi-deciduous forest located in an area belonging to the Agricultural Experimental Station IUNG-PIB in Osiny, Poland. The basic chemical and biological parameters of soils were determined, as well as

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Sirota, T. V. "Effect of the sulfur-containing compounds on the quinoid process of adrenaline autoxidation; potential neuroprotectors." Biomeditsinskaya Khimiya 65, no. 4 (2019): 316–23. http://dx.doi.org/10.18097/pbmc20196504316.

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The superoxide-generating reaction of adrenaline autoxidation in an alkaline medium, used in vitro to identify the antioxidant properties of various compounds, simulates the complex multistep process of quinoid oxidation of catecholamines (CA) in the body. Sulfur-containing cysteine (Cys) and reduced glutathione (GSH), as well as oxidized glutathione (GSSG), have been shown to inhibit this process. The studied substances were considered as inhibitors of quinoid oxidation and are evaluated as antioxidants. The IC50 values for Cys and GSH were close to 7.5 mM. Inhibition by GSSG was weaker; repr

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Tsekhmistrenko, O., O. Shulko, N. Gayuk, and L. Onyshchenko. "Fatty acid composition of quail blood erythrocyte membranes under condition of feeding sodium selenite and nanoselenium." Tehnologìâ virobnictva ì pererobki produktìv tvarinnictva, no. 2 (182) (November 23, 2023): 71–77. http://dx.doi.org/10.33245/2310-9289-2023-182-2-71-77.

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Infectious diseases are a significant problem in poultry farming, because they significantly slow down the growth rate of the industry and lead to losses. For the productive development of the industry and the avoidance of danger to the health of consumers due to the uncontrolled use of these drugs, it is worth using alternative methods of protecting poultry and improving the quality of the obtained products, in particular drugs obtained by nanotechnological means. Nowadays, nanoparticles of various minerals are used in poultry farming, the mineral antagonism of which is reduced in the intesti

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