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Journal articles on the topic 'Oxidized system'

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Published: 30 May 2022

Last updated: 31 July 2025

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1

Uetrecht, Jack P. "Myeloperoxidase as a generator of drug free radicals." Biochemical Society Symposia 61 (November 1, 1995): 163–70. http://dx.doi.org/10.1042/bss0610163.

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Reactive metabolites are believed to be responsible for many types of toxicity, including idiosyncratic drug reactions. Bone marrow is a frequent target of idiosyncratic reactions, and, since these reactions have characteristics that suggest involvement of the immune system, the formation of reactive metabolites by leucocytes could also play a role in the aetiology of idiosyncratic drug reactions. The major oxidation system in neutrophils and monocytes is a combination of NADPH oxidase and myeloperoxidase. This system oxidizes primary arylamines, such as sulphonamides, to reactive metabolites

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2

Khodaei, Mohammad Mehdi, Kiumars Bahrami, and Mohammad Khedri. "The efficient and chemoselective MoO3-catalyzed oxidation of sulfides to sulfoxides and sulfones with H2O2." Canadian Journal of Chemistry 85, no. 1 (2007): 7–11. http://dx.doi.org/10.1139/v06-177.

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Hydrogen peroxide together with MoO3 as catalyst can efficiently and chemoselectivity oxidize sulfides to sulfoxides and sulfones in the presence of other oxidized functional groups in ethanol at 50 °C in short reaction times.Key words: oxidation, sulfides, sulfoxides, sulfones, H2O2–MoO3 system.

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3

Hu, Yan Fang, Xiao Dong Zhang, Zhao Guang Nie, Ya Cheng Xing, Bo Qun Lin, and Li Li Song. "Selective Oxidation of Corn Starch in TEMPO-Mediated System." Advanced Materials Research 1051 (October 2014): 221–24. http://dx.doi.org/10.4028/www.scientific.net/amr.1051.221.

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With TEMPO-NaClO-NaBr as the selective oxidation system, the oxidized corn starch was prepared from the corn starch, substituting traditional pre-gelatinized corn starch. The relationship of the carboxyl mass fraction of the oxidized starch and the dosage of oxidant was studied under the conditions such as: the mass of the corn starch was 5.0g, the pH was 10.00, the reaction temperature was 20 °C. The structure of the oxidized corn starch was characterized by IR. The results showed that when the consumption of NaClO was 67.5 mL, the reaction time was 2.5 h, the carboxyl of oxidized starch can

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4

Xin, Yufeng, Yaxin Wang, Honglin Zhang, et al. "Cupriavidus pinatubonensis JMP134 Alleviates Sulfane Sulfur Toxicity after the Loss of Sulfane Dehydrogenase through Oxidation by Persulfide Dioxygenase and Hydrogen Sulfide Release." Metabolites 13, no. 2 (2023): 218. http://dx.doi.org/10.3390/metabo13020218.

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An incomplete Sox system lacking sulfane dehydrogenase SoxCD may produce and accumulate sulfane sulfur when oxidizing thiosulfate. However, how bacteria alleviate the pressure of sulfane sulfur accumulation remains largely unclear. In this study, we focused on the bacterium Cupriavidus pinatubonensis JMP134, which contains a complete Sox system. When soxCD was deleted, this bacterium temporarily produced sulfane sulfur when oxidizing thiosulfate. Persulfide dioxygenase (PDO) in concert with glutathione oxidizes sulfane sulfur to sulfite. Sulfite can spontaneously react with extra persulfide gl

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5

Grisham, M. B., and E. M. Ryan. "Cytotoxic properties of salivary oxidants." American Journal of Physiology-Cell Physiology 258, no. 1 (1990): C115—C121. http://dx.doi.org/10.1152/ajpcell.1990.258.1.c115.

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Salivary peroxidase and to a lesser extent myeloperoxidase are present in significant concentrations in saliva and catalyze the oxidation of thiocyanate anion (SCN-) by H2O2 to yield the potent oxidants hypothiocyanous acid (HOSCN) and its conjugate base hypothiocyanite anion (OSCN-). The objective of this study was to characterize the cytotoxic potential of peroxidase-generated HOSCN/OSCN- toward human erythrocytes. We found that HOSCN/OSCN- (0.25 mM) generated by the peroxidase-H2O2-SCN- system caused significant hemolysis at pH 6.0 but not at pH 6.5, 7.0, or 7.4. Erythrocyte hemoglobin (Oxy

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6

Lee, Jeong Kyeong, and Tae_Hyuk Kwon. "Photo-Electro-Upcycling of Biomass via Dye-Sensitized Photoanode with Passivation Effect." ECS Meeting Abstracts MA2024-02, no. 59 (2024): 3995. https://doi.org/10.1149/ma2024-02593995mtgabs.

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Solar valuable chemical conversion is being actively studied for a sustainable environment. Organic dyesensitized semiconductor systems are suitable due to their easy band gap tuning, broad absorption spectrum, facile fabrication, and relatively low priced compared to metal complexes to convert light to valuable substances effectively and stably. However, charge transfer from biomass to oxidized organic dye is relatively slow in typical dye-sensitized photoelectrochemical cells, resulting in remarkably low current density, unlike photovoltaics. Hence, the holes can be extracted from organic dy

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Kooti, Mohammad, and Mehdi Jorfi. "Mild and Efficient Oxidation of Aromatic Alcohols and Other Substrates Using NiO2/CH3COOH System." E-Journal of Chemistry 5, no. 2 (2008): 365–69. http://dx.doi.org/10.1155/2008/826184.

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A variety of aromatic alcohols were efficiently oxidized to their corresponding aldehydes and ketones in good to excellent yields using nickel peroxide activated by acetic acid. Some thiols and amines were also readily oxidized by this oxidant under mild conditions.

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8

Mander, Gerd J., Huaming Wang, Elizabeth Bodie, et al. "Use of Laccase as a Novel, Versatile Reporter System in Filamentous Fungi." Applied and Environmental Microbiology 72, no. 7 (2006): 5020–26. http://dx.doi.org/10.1128/aem.00060-06.

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ABSTRACT Laccases are copper-containing enzymes which oxidize phenolic substrates and transfer the electrons to oxygen. Many filamentous fungi contain several laccase-encoding genes, but their biological roles are mostly not well understood. The main interest in laccases in biotechnology is their potential to be used to detoxify phenolic substances. We report here on a novel application of laccases as a reporter system in fungi. We purified a laccase enzyme from the ligno-cellulolytic ascomycete Stachybotrys chartarum. It oxidized the artificial substrate 2,2′-azino-di-(3-ethylbenzthiazolinsul

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9

Butrim, Sergey Mikhailovich, Tatyana Dmitrievna Bil′dyukevich, Natalya Stepanovna Butrim, and Vladimir Vladimirovich Litvyak. "OXIDATION OF VISCOSE IN THE HNO3–H3PO4–NaNO2 SYSTEM: FUNCTIONAL AND STRUCTURAL ANALYSIS, PROPERTIES AND POTENTIAL APPLICATION." chemistry of plant raw material, no. 1 (February 25, 2025): 78–86. https://doi.org/10.14258/jcprm.20250114584.

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A method has been developed for the oxidation of regenerated cellulose (viscose) in the HNO3–H3PO4–NaNO2 system, which makes it possible to obtain oxidized regenerated cellulose with a COOH group content of 18–24% in powder form, which meets USP quality requirements, which allows its use as a biodegradable hemostatic material. The structure of oxidized regenerated celluloses with different contents of COOH groups was confirmed by IR spectroscopy and elemental analysis; the structure of the samples and their thermal stability were studied by X-ray diffraction and thermogravimetric (TG) analyses

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10

Myja, David, Éric Loranger, and Robert Lanouette. "Treatment levels of 4-acetamido-TEMPO oxidized thermomechanical pulp to improve paper properties and clay retention." BioResources 14, no. 3 (2019): 7056–67. http://dx.doi.org/10.15376/biores.14.3.7056-7067.

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TEMPO-oxidized thermomechanical pulp (TMP) prepared at low-oxidized and highly oxidized levels was compared with untreated TMP to observe the advantage of each pulp on paper properties. While the low oxidized pulp and non-oxidized pulp gave similar properties, highly oxidized TMP significantly increased tensile strength and decreased tear strength. Brightness was negatively affected by oxidation. In order to improve the paper optical properties, the use of a conventional mineral filler retention system was studied, using clay as filler. The high charge induced by the oxidized pulp significantl

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11

Mattson, Bengt, Bengt Stenberg, Sture Persson, and Erik Östman. "Thermo-Oxidative Degradation of Thick-Walled Rubber Materials Studied by IR-Technique and Computed X-Ray Tomography Scanning." Rubber Chemistry and Technology 63, no. 1 (1990): 23–31. http://dx.doi.org/10.5254/1.3538239.

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Abstract Natural rubber cylinders vulcanized with two different systems, TMTD, which is an efficient vulcanizing system (EV system) and S/CBS, which is a conventional system, have been studied with respect to thermo-oxidative aging gradients, by the ATR-IR-technique (attenuated total-reflection infrared spectroscopy), computed x-ray tomography scanning and swelling. Observed aging processes are dominated by the formation of an oxidized layer whose low permeability to oxygen protects the interior of the material from oxidative aging processes as long as it is intact. The time to the formation o

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Rencoret, Jorge, Antonio Pereira, Gisela Marques, José Carlos del Río, Ángel T. Martínez, and Ana Gutiérrez. "A commercial laccase-mediator system to delignify and improve saccharification of the fast-growing Paulownia fortunei (Seem.) Hemsl." Holzforschung 73, no. 1 (2018): 45–54. http://dx.doi.org/10.1515/hf-2018-0095.

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Abstract It was demonstrated for the first time that a laccase-based enzymatic pretreatment is able to delignify fast-growing paulownia species. The treatment was performed with a commercial low-redox potential laccase isolated from Myceliophthora thermophila (Apinis) Oorschot and methyl syringate (MeS) as a natural phenolic mediator. Up to 24% lignin removal was attained by the laccase-MeS treatment (L/MeS), followed by alkaline peroxide extraction in a multistage sequence. The reduction in lignin content was accompanied by a significant improvement in the subsequent enzymatic saccharificatio

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13

Liu, G. D., Z. X. Zhao, G. C. Che, J. W. Li, and F. Wu. "Superconducting properties of the oxidized La2−xBaxCuO4 system." Physica C: Superconductivity 282-287 (August 1997): 755–56. http://dx.doi.org/10.1016/s0921-4534(97)00392-4.

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14

Aksu, Seda, Isabel W. C. E. Arends, and Frank Hollmann. "A New Regeneration System for Oxidized Nicotinamide Cofactors." Advanced Synthesis & Catalysis 351, no. 9 (2009): 1211–16. http://dx.doi.org/10.1002/adsc.200900033.

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15

Jones, Colleen P., Seth N. Lyman, Daniel A. Jaffe, Tanner Allen, and Trevor L. O'Neil. "Detection and quantification of gas-phase oxidized mercury compounds by GC/MS." Atmospheric Measurement Techniques 9, no. 5 (2016): 2195–205. http://dx.doi.org/10.5194/amt-9-2195-2016.

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Abstract. Most mercury pollution is emitted to the atmosphere, and the location and bioavailability of deposited mercury largely depends on poorly understood atmospheric chemical reactions that convert elemental mercury into oxidized mercury compounds. Current measurement methods do not speciate oxidized mercury, leading to uncertainty about which mercury compounds exist in the atmosphere and how oxidized mercury is formed. We have developed a gas chromatography/mass spectrometry (GC-MS)-based system for identification and quantification of atmospheric oxidized mercury compounds. The system co

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16

Davies, P. K., та C. M. Katzan. "Oxidation, reduction, and stability of the BaLa4Cu5O13±δ system". Proceedings, annual meeting, Electron Microscopy Society of America 47 (6 серпня 1989): 162–63. http://dx.doi.org/10.1017/s0424820100152781.

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The electronic and structural properties of most of the high temperature superconducting copper oxides are highly dependent upon the oxidation conditions used to prepare the cuprate compounds. Until recently superconductivity had only been observed in highly oxidized compounds, however recent work has shown that under certain circumstances superconducting transitions can also occur in n-doped, reduced cuprates. In an effort to understand some of the chemical factors that lead to the stabilization of both oxidized and reduced cuprates, we have investigated the stability of several cuprates. In

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Chang, Yue, Zhongkui Dai, Kaili Suo, Yuhang Wang та Xiaona Ren. "Oxidized Graphitic-C3N4 with an Extended π-System for Enhanced Photoelectrochemical Property and Behavior". Crystals 13, № 9 (2023): 1386. http://dx.doi.org/10.3390/cryst13091386.

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In this work, an oxidized g-C3N4 film was successfully synthesized using a two-step acid treatment and electrophoretic deposition method. The delocalized π-system of the oxidized g-C3N4 film was extended via an annealing treatment. We investigated the influence of hydrogen bonding reversibility and the oxidation treatment of g-C3N4 on the photoelectrochemical property and photocathodic protection for 304 stainless steel (304 SS). The resulting oxidized g-C3N4 photoelectrode with an extended π-system presents a remarkably enhanced photogenerated electron transfer capability from the photoelectr

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18

Mishra, Shree P., Anne-S. Manent, Bruno Chabot, and Claude Daneault. "Production of nanocellulose from native cellulose – Various options utilizing ultrasound." BioResources 7, no. 1 (2011): 422–36. http://dx.doi.org/10.15376/biores.7.1.422-436.

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In this study three different ways of applying ultrasound for the production of nanocellulose from native cellulose were explored. In the first option bleached hardwood kraft pulp was oxidized with the ultrasound (US) assisted TEMPO/NaBr/NaOCl-system (US-TEMPO-system) followed by mechanical separation of nanocellulose. The pulp oxidized by the US-TEMPO-system had higher carboxyls content and ca. 10% increase in nanocellulose yield when compared to the TEMPO-system without sono catalysis. In the second option ultrasound pretreated pulp was oxidized using the TEMPO-system. Although there was no

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19

Germanenko, I. N., M. Dongol, Y. B. Pithawalla, M. Samy El-Shall, and J. A. Carlisle. "Effect of atmospheric oxidation on the electronic and photoluminescence properties of silicon nanocrystal." Pure and Applied Chemistry 72, no. 1-2 (2000): 245–55. http://dx.doi.org/10.1351/pac200072010245.

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Web-like aggregates of coalesced Si nanocrystals produced by a laser vaporization-controlled condensation technique show luminescence properties that are similar to those of porous Si. The results are consistent with a quantum confinement mechanism as the source of the red photoluminescence (PL) in this system. The oxidized Si nanoparticles do not exhibit the red PL that is characteristic of the surface-oxidized Si nanocrystals. The nanoparticles are allowed to oxidize slowly, and the PL is measured as a function of the exposure time in air. A significant blue shift in the red PL peak is obser

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20

Lerner, Natalie, Itay Chen, Sofia Schreiber-Avissar, and Elie Beit-Yannai. "Extracellular Vesicles Mediate Anti-Oxidative Response—In Vitro Study in the Ocular Drainage System." International Journal of Molecular Sciences 21, no. 17 (2020): 6105. http://dx.doi.org/10.3390/ijms21176105.

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The importance of extracellular vesicles (EVs) as signaling mediators has been emphasized for several pathways with only limited data regarding their role as protective messages during oxidative stress (OS). The ocular drainage system is unique by being continuously exposed to OS and having a one-way flow of the aqueous humor carrying EVs taking role in glaucoma disease. Here, we aimed to examine the ability of EVs derived from the non-pigmented ciliary epithelium (NPCE)—the aqueous humor producing cells exposed to OS—to deliver protecting messages to the trabecular meshwork (TM)—the aqueous h

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21

Friguet, Bertrand. "Protein Repair and Degradation during Aging." Scientific World JOURNAL 2 (2002): 248–54. http://dx.doi.org/10.1100/tsw.2002.98.

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Cellular aging is characterized by a build-up of oxidatively modified proteins. The steady-state level of oxidized proteins depends on the balance between the rate of protein oxidative damage and the rates of protein degradation and repair. Therefore, the accumulation of oxidized protein with age can be due to increased protein damage, decreased oxidized protein degradation and repair, or the combination of both mechanisms. The proteasomal system is the major intracellular proteolytic pathway implicated in the degradation of oxidized protein, and the peptide methionine sulfoxide reductase cata

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22

Magacz, Marcin, Maria Oszajca, Izabela Nawrot-Hadzik, et al. "Phenolic Compounds of Reynoutria sp. as Modulators of Oral Cavity Lactoperoxidase System." Antioxidants 10, no. 5 (2021): 676. http://dx.doi.org/10.3390/antiox10050676.

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Lactoperoxidase (LPO) together with its (pseudo)halogenation cycle substrates, H2O2 and thiocyanate ions oxidized to hypothiocyanite ions, form one of the main systems involved in antimicrobial defense within the oral cavity. In bacterial diseases such as dental caries, lactoperoxidase is oxidized to a form known as Compound II, which is characterized by its inability to oxidize SCN–, resulting in a decreased generation of antimicrobial products. Reynoutria sp. rizome extracts, due to their high polyphenol content, have been tested as a source of compounds able to regenerate the antimicrobial

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23

Sherwood, Peter M. A., Ian D. Welsh, and David M. Hercules. "Surface Studies of the Nickel Electrode System Using a Special Transfer Cell." Applied Spectroscopy 42, no. 4 (1988): 658–66. http://dx.doi.org/10.1366/0003702884429337.

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Nickel metal with an unoxidized and an electrochemically oxidized surface can be transferred considerable distances between vacuum systems, without significant surface change, in an anaerobic cell for study by various surface science methods (XPS, Auger, ISS, and SIMS). The SIMS and ISS spectra are very sensitive to hydrocarbon contamination, which can be nearly eliminated by using the transfer cell. Complementary information is obtained using these surface analytical methods. Electrochemically oxidized nickel metal samples show the presence of oxide and hydroxide species. The results are comp

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Rasskazov, S. V., E. P. Chebykin, I. S. Chuvashova, A. M. Ilyasova, S. V. Snopkov, and Sun Yi-ming. "Monitoring of Uranium Components and Si – Na/Li Temperatures in the Arshan Groundwater Reservoir of Tunka Valley in 2012–2024: Tracing Paragenetic Relationships between Hydrogeochemical, Seismic, and Volcanic Processes in the Baikal Rift System." Geology and Environment 4, no. 3 (2024): 65–112. http://dx.doi.org/10.26516/2541-9641.2024.3.65.

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Monitoring series of the 234U/238U activity ratio, concentrations of U, and Si – Na/Li temperatures in reservoir of groundwater from the Arshan sanatorium area in the Tunka Valley are obtained in 2012–2024. With taking into account published materials and existing ideas on the groundwater genesis in the Tunka Valley, it is proposed that the entry of uranium components into groundwater is controlled by uranium dissolution under the influence of gases – oxidizers and reducers. It is augured that the isotopic equilibrium between 234U and 238 in cold carbon dioxide mineral waters can serve as an i

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Kolesnikova, L. I., O. A. Vanteeva, N. A. Kurashova, and B. Ya Vlasov. "GLUTATHION AS AN IMPORTANT COMPONENT OF THIOSULFID SYSTEM OF INFERTILITY PATHOGENESIS IN OVERWEIGHT MEN." Annals of the Russian academy of medical sciences 68, no. 7 (2013): 9–12. http://dx.doi.org/10.15690/vramn.v68i7.705.

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Aim: to study the glutathionic part of thiosulfid system and oxidative stress in infertile men with different body mass index. Patients and methods: examined 60 infertile men with normal and overweight, and 40 healthy men with proven fertility. Active components of the antioxidant defense system of the body was assessed by the level of reduced and oxidized glutathione by the method of PY Hissin, determination of TBA-active products was carried out by the method VB Gavrilova. In the analysis of inter-group differences for independent samples was used parametric Student criterion. Results: the o

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Alguacil, Francisco J., Irene García-Díaz, Esther Escudero Baquero, Olga Rodríguez Largo, and Félix A. López. "Oxidized and Non-Oxidized Multiwalled Carbon Nanotubes as Materials for Adsorption of Lanthanum(III) Aqueous Solutions." Metals 10, no. 6 (2020): 765. http://dx.doi.org/10.3390/met10060765.

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The behavior of oxidized and non-oxidized multiwalled carbon nanotubes (MWCNTs) in the adsorption of lanthanum(III) from aqueous solutions is described. Metal uptake is studied as a function of several variables such as the stirring speed of the system, pH of the aqueous solution and metal and nanomaterial concentrations. The experimental results are fitted to various kinetic and isotherm models, the rate law being fitted to the film diffusion and particle diffusion models, when the non-oxidized and the oxidized nanomaterials are used to remove lanthanum from the solution, respectively. Sulfur

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Semenova, M. A., D. A. Dolgikh, M. P. Kirpichnikov, et al. "Development of a System for Biosynthesis, Isolation and Purification of Holoform of Recombinant Human Neuroglobin and Its Characteristics." Биоорганическая химия 49, no. 3 (2023): 319–30. http://dx.doi.org/10.31857/s013234232303020x.

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An efficient system for the biosynthesis, isolation and purification of recombinant human neuroglobin has been developed and optimized, which makes it possible to produce protein in quantities sufficient to study its properties. According to UV-visible, IR-, CD-, and NMR spectroscopy data, recombinant neuroglobin is a structured protein in the holoform state. The data of chromato-mass-spectrometric analysis made it possible to conclude that there is a correctly formed disulfide bond in the structure of the oxidized form of the protein. Using Raman and surface-enhanced Raman spectroscopy with l

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Zhang, Chi, Xiao Dong Jia, Ya Lin Lu, Dian Wen Liu, and Xiao Lin Zhang. "Review on New Process and New Reagent of Copper Oxide." Advanced Materials Research 1010-1012 (August 2014): 1618–21. http://dx.doi.org/10.4028/www.scientific.net/amr.1010-1012.1618.

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The paper briefly analyzes and systematically summarizes flotation process and chemical treatment method of low-grade oxidized copper ores in recent years. The new high-efficient collectors and system of reagent combined usage are developed widely and have become an important research direction of oxidized copper ores.

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Mun, Ji Eun, Woo Joong Kim, Jeung Ri Kong, and Nam Jin Kim. "Effects of Nano Particles Attached onto a Heat Transfer Surface in the Thermal-Hydraulic System." Key Engineering Materials 775 (August 2018): 127–31. http://dx.doi.org/10.4028/www.scientific.net/kem.775.127.

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This work experimentally explored the influence of nano-fouling, and it was also compared and analyzed CHF, flow boiling heat transfer coefficient, contact angle, and surface roughness. The working fluids in this study were used as purewater and a 0.01 vol% oxidized MWCNT nanofluid. The flow velocity conditions are established at 0.5, 1.0, and 1.5 m/s. Also, the nanoparticles of oxidized graphene were deposited on a heat transfer surface, and artificial spray coating times for nano-fouling are established at 0, 120, 180, and 240 sec. As the results, it was found that the superheated temperatur

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Semenova, M. A., Z. V. Bochkova, O. M. Smirnova, et al. "Development of a System for Biosynthesis, Isolation and Purification of the Holoform of Recombinant Human Neuroglobin and Its Characteristics." Russian Journal of Bioorganic Chemistry 49, no. 3 (2023): 550–61. http://dx.doi.org/10.1134/s1068162023030196.

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Abstract— An efficient system for the biosynthesis, isolation and purification of recombinant human neuroglobin has been developed and optimized, which makes it possible to produce protein in quantities sufficient to study its properties. According to UV-visible, IR-, CD-, and NMR spectroscopy data, recombinant neuroglobin is a structured protein in the holoform state. The data of chromato-mass-spectrometric analysis made it possible to conclude that there is a correctly formed disulfide bond in the structure of the oxidized form of the protein. Using Raman and surface-enhanced Raman spectrosc

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Ohwaki, T., and H. Ishida. "Optimization of the Surface Characterization of Carbon Fiber by FT-IR Internal Reflection Spectroscopy." Applied Spectroscopy 49, no. 3 (1995): 341–48. http://dx.doi.org/10.1366/0003702953963634.

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Infrared spectra of surface-oxidized carbon fibers have been obtained with different angles of incidence, polarization states, and internal reflection elements (IREs) to find the optimal condition by internal reflection spectroscopy. It has been found that the maximum peak area of a surface functional group is obtained by using s-polarized light at a 30° angle of incidence for the multiple reflection technique. However, the highest signal-to-noise ratio is observed if unpolarized light is used. Spectral simulations have been performed to understand the observed spectra of the surface-oxidized

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Bihlmaier, Karl, Nikola Mesecke, Nadia Terziyska, Melanie Bien, Kai Hell, and Johannes M. Herrmann. "The disulfide relay system of mitochondria is connected to the respiratory chain." Journal of Cell Biology 179, no. 3 (2007): 389–95. http://dx.doi.org/10.1083/jcb.200707123.

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All proteins of the intermembrane space of mitochondria are encoded by nuclear genes and synthesized in the cytosol. Many of these proteins lack presequences but are imported into mitochondria in an oxidation-driven process that relies on the activity of Mia40 and Erv1. Both factors form a disulfide relay system in which Mia40 functions as a receptor that transiently interacts with incoming polypeptides via disulfide bonds. Erv1 is a sulfhydryl oxidase that oxidizes and activates Mia40, but it has remained unclear how Erv1 itself is oxidized. Here, we show that Erv1 passes its electrons on to

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Matthews, D., A. Altus, and A. Hope. "Photochemical Electron Transfer in the System Polypyrrole-Methylene Blue." Australian Journal of Chemistry 47, no. 6 (1994): 1163. http://dx.doi.org/10.1071/ch9941163.

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Methylene Blue incorporated into colloidal oxidized polypyrrole was investigated by absorption spectroscopy and laser flash photolysis. The absorption spectra of Methylene Blue and polypyrrole were unaffected by incorporation. Flash photolysis transients of Methylene Blue and triplet Methylene Blue in ethanol were affected by 1,4-benzoquinone and 1,4-benzoquinol but not by the long-chain naphthoquinone Vitamin K1. Incorporation of Methylene Blue in polypyrrole produced distinct changes in the flash photolysis transients of Methylene Blue and triplet Methylene Blue. Very long-lived transients,

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Li, Yanrui, Detao Kong, Qinghua Yang, et al. "Oxidized Starch-Reinforced Aqueous Polymer Isocyanate Cured with High-Frequency Heating." Polymers 16, no. 11 (2024): 1609. http://dx.doi.org/10.3390/polym16111609.

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In this research, an oxidized starch/styrene–butadiene rubber system with high capability of absorbing electromagnetic energy was adopted as the main component, the effect of oxidized starch content on the bonding and mechanical properties of aqueous polymer isocyanate (API) after high-frequency curing was evaluated, and the effect mechanisms were explored by combining thermodynamic tests and material characterization methods. Our findings revealed that the addition of oxidized starch enhanced the mechanical properties of API after high-frequency curing and the increase in the amount of oxidiz

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Johnson, Erika L., and Michael R. Hyman. "Propane and n-Butane Oxidation by Pseudomonas putida GPo1." Applied and Environmental Microbiology 72, no. 1 (2006): 950–52. http://dx.doi.org/10.1128/aem.72.1.950-952.2006.

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ABSTRACT Propane and n-butane inhibit methyl tertiary butyl ether oxidation by n-alkane-grown Pseudomonas putida GPo1. Here we demonstrate that these gases are oxidized by this strain and support cell growth. Both gases induced alkane hydroxylase activity and appear to be oxidized by the same enzyme system used for the oxidation of n-octane.

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Avdeenko, A. P., Yu P. Kholmovoi та A. L. Yusina. "REDOX PROCESSES IN THE REACTIONS OF N-ARYLSULFONYL-1,4-NAPHTНOQUINONЕIMINES WITH CERTAIN NUCLEOPHILES". Odesa National University Herald. Chemistry 26, № 3(79) (2021): 55–62. http://dx.doi.org/10.18524/2304-0947.2021.3(79).240753.

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Quinone-hydroquinone pairs are prototypes of organic redox systems, and studies of the electrochemical behavior of these compounds are of great interest for research. Electrochemical behavior associated with the equilibrium of electron-proton transfer provides information about the molecular structure and environment of the process. Apart from chemical aspects, quinones play an important role in the biochemistry of living cells. Quinone derivatives, used as drugs for several types of human cancers, have been found to have their biological activity related to their redox behavior. Quinoneimines

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Canales, Camila, Leyla Gidi, Roxana Arce, Francisco Armijo, María Aguirre, and Galo Ramírez. "Electro-Reduction of Molecular Oxygen Mediated by a Cobalt(II)octaethylporphyrin System onto Oxidized Glassy Carbon/Oxidized Graphene Substrate." Catalysts 8, no. 12 (2018): 629. http://dx.doi.org/10.3390/catal8120629.

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The oxygen reduction reaction (ORR) is the most important reaction in life processes and in energy transformation. The following work presents the design of a new electrode which is composed by deposited cobalt octaethylporphyrin onto glassy carbon and graphene, where both carbonaceous materials have been electrochemically oxidized prior to the porphyrin deposition. The novel generated system is stable and has an electrocatalytic effect towards the oxygen reduction reaction, as a result of the significant overpotential shift in comparison to the unmodified electrode and to the electrodes used

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Serikbayeva, A. K., K. Zh Zhumashev, F. A. Berdikulova, and Sh K. Akilbekova. "STUDY OF PHASE TRANSFORMATIONS IN OXIDIZED COPPER ORE – SULFUR SYSTEM." Izvestiya Vuzov Tsvetnaya Metallurgiya (Proceedings of Higher Schools Nonferrous Metallurgy, no. 5 (November 4, 2017): 34–41. http://dx.doi.org/10.17073/0021-3438-2017-5-34-41.

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GROSSMAN, Lawrence, Alexei V. FEDKIN, and Steven B. SIMON. "Formation of the first oxidized iron in the solar system." Meteoritics & Planetary Science 47, no. 12 (2012): 2160–69. http://dx.doi.org/10.1111/j.1945-5100.2012.01353.x.

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Costa Pessoa, J., I. Tomaz, T. Kiss, and P. Buglyó. "The system VO2++oxidized glutathione: a potentiometric and spectroscopic study." Journal of Inorganic Biochemistry 84, no. 3-4 (2001): 259–70. http://dx.doi.org/10.1016/s0162-0134(00)00233-6.

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Tetik, Sermin, Kurtulus Kaya, and Turay Yardimci. "Effect of Oxidized Fibrinogen on Hemostatic System: In Vitro Study." Clinical and Applied Thrombosis/Hemostasis 17, no. 3 (2010): 259–63. http://dx.doi.org/10.1177/1076029610363129.

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Roy, H. N., Pijush K. Roy, SA Shumi, MM Rahman, and MN Islam. "Smooth Dearomatization of Some Phenols by BAIB and Facile Aerial Oxidation of Two γ-Hydrogen Containing Anthraquinones." Journal of the Bangladesh Chemical Society 25, no. 1 (2012): 21–29. http://dx.doi.org/10.3329/jbcs.v25i1.11767.

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At ambient condition bis(acetoxy)iodo benzene (BAIB) oxidized phenol and substituted phenols and the oxidized products undergo easy annulation reaction with cyanophthalide at ice cold temperature. Methyl or ethyl group at position C-1 in anthraquinone system has participated smooth aerial oxidation under sunlight. DOI: http://dx.doi.org/10.3329/jbcs.v25i1.11767 Journal of Bangladesh Chemical Society, Vol. 25(1), 21-29, 2012

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Elghali, Abdellatif, Mostafa Benzaazoua, Bruno Bussière, and Thomas Genty. "Spatial Mapping of Acidity and Geochemical Properties of Oxidized Tailings within the Former Eagle/Telbel Mine Site." Minerals 9, no. 3 (2019): 180. http://dx.doi.org/10.3390/min9030180.

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At some orphaned and abandoned mine sites, acid mine drainage can represent a complex challenge due to the advanced tailings’ oxidation state as well as the combination of other factors. At the field scale, several parameters control sulfides’ oxidation rates and, therefore, the acidity generation. The objective of this paper is to map the acidity and geochemical properties of oxidized tailings within a closed tailings storage facility. Based on systematic sampling, various geochemical parameters were measured within the oxidized Joutel tailings, including the: Neutralization potential, acid-g

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Weih, Markus, Marion Schmitt, Janette Gieche, et al. "Proteolysis of Oxidized Proteins after Oxygen–Glucose Deprivation in Rat Cortical Neurons is Mediated by the Proteasome." Journal of Cerebral Blood Flow & Metabolism 21, no. 9 (2001): 1090–96. http://dx.doi.org/10.1097/00004647-200109000-00006.

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Oxidative injury contributes to cellular damage during and after cerebral ischemia. However, the downstream catabolic pathways of damaged cellular components in neurons are largely unknown. In the current study, the authors examined the formation of oxidized proteins and their active degradation by the proteasome. In near-pure rat primary cortical neurons, it was found that protein-bound carbonyls as markers for oxidized proteins are increased after oxygen-glucose deprivation (OGD). During and after OGD, degradation of proteins metabolically radiolabeled before OGD increases two-to threefold c

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Zingg, Jean-Marc, Adelina Vlad, and Roberta Ricciarelli. "Oxidized LDLs as Signaling Molecules." Antioxidants 10, no. 8 (2021): 1184. http://dx.doi.org/10.3390/antiox10081184.

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Levels of oxidized low-density lipoproteins (oxLDLs) are usually low in vivo but can increase whenever the balance between formation and scavenging of free radicals is impaired. Under normal conditions, uptake and degradation represent the physiological cellular response to oxLDL exposure. The uptake of oxLDLs is mediated by cell surface scavenger receptors that may also act as signaling molecules. Under conditions of atherosclerosis, monocytes/macrophages and vascular smooth muscle cells highly exposed to oxLDLs tend to convert to foam cells due to the intracellular accumulation of lipids. Mo

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Gagné, F., C. André, and C. Blaise. "The Dual Nature of Metallothioneins in the Metabolism of Heavy Metals and Reactive Oxygen Species in Aquatic Organisms: Implications of Use as a Biomarker of Heavy-Metal Effects in Field Investigations." Biochemistry Insights 1 (January 2008): BCI.S1007. http://dx.doi.org/10.4137/bci.s1007.

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The purpose of this study was to examine the function of metallothioneins (MT) in respect to the mobilization of heavy metals and superoxide anion (O2–) scavenging in aquatic organisms. Using an O2– generating system, liberation of free zinc from native and zinc MT (Zn-MT) was measured in vitro. Addition of the O2– generating system and H2O2 readily increased the di- and trimeric forms of MT as determined by gel electrophoresis analysis. To determine whether the proportion of oxidized MT could change in contaminated environments, metal-contaminated Mya arenaria clams were collected from a harb

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Wanner, J., J. S. Čech, and M. Kos. "New Process Design for Biological Nutrient Removal." Water Science and Technology 25, no. 4-5 (1992): 445–48. http://dx.doi.org/10.2166/wst.1992.0532.

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A new arrangement of the biological process for efficient COD, N and P removal has been proposed. The process consists of the anaerobic reactor where organic substances from waste water are sequestered into activated sludge, the nitrification reactor where ammonia-rich supernatant is oxidized, and the denitrification reactor where oxidized supernatant is mixed with the activated sludge separated from the anaerobic reactor. Laboratory experiments confirmed favorable characteristics of the proposed system.

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Chakraborty, Anirban, Eric E. Roden, Jürgen Schieber, and Flynn Picardal. "Enhanced Growth of Acidovorax sp. Strain 2AN during Nitrate-Dependent Fe(II) Oxidation in Batch and Continuous-Flow Systems." Applied and Environmental Microbiology 77, no. 24 (2011): 8548–56. http://dx.doi.org/10.1128/aem.06214-11.

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ABSTRACTMicrobial nitrate-dependent, Fe(II) oxidation (NDFO) is a ubiquitous biogeochemical process in anoxic sediments. Since most microorganisms that can oxidize Fe(II) with nitrate require an additional organic substrate for growth or sustained Fe(II) oxidation, the energetic benefits of NDFO are unclear. The process may also be self-limiting in batch cultures due to formation of Fe-oxide cell encrustations. We hypothesized that NDFO provides energetic benefits via a mixotrophic physiology in environments where cells encounter very low substrate concentrations, thereby minimizing cell encru

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Ionin, Vladislav A., Yuriy N. Malyar, Valentina S. Borovkova, Dmitriy V. Zimonin, Roksana M. Gulieva, and Olga Yu Fetisova. "Inherited Structure Properties of Larch Arabinogalactan Affected via the TEMPO/NaBr/NaOCl Oxidative System." Polymers 16, no. 11 (2024): 1458. http://dx.doi.org/10.3390/polym16111458.

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Arabinogalactan (AG), extracted from larch wood, is a β-1,3-galactan backbone and β-1,6-galactan side chains with attached α-1-arabinofuranosyl and β-1-arabinopyranosyl residues. Although the structural characteristics of arabinogalactan II type have already been studied, its functionalization using 2,2,6,6-tetramethylpiperidin-1-oxyl (TEMPO) oxidation remains a promising avenue. In this study, the oxidation of AG, a neutral polysaccharide, was carried out using the TEMPO/NaBr/NaOCl system, resulting in polyuronides with improved functional properties. The oxidation of AG was controlled by ana

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Zygouri, Panagiota, Theodoros Tsoufis, Antonios Kouloumpis, et al. "Synthesis, characterization and assessment of hydrophilic oxidized carbon nanodiscs in bio-related applications." RSC Advances 8, no. 1 (2018): 122–31. http://dx.doi.org/10.1039/c7ra11045f.

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