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Journal articles on the topic 'Oxidation degree'

Author: Grafiati

Published: 5 June 2025

Last updated: 1 August 2025

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1

Sardarly, А. М. "PHASE COMPOSITION AND OXIDATION DEGREE OF VANADIUM IN CATALYSTS FOR OXIDATIVE DEHYDROGENATION OF PROPANE." Chemical Problems 20, no. 4 (2022): 358–65. http://dx.doi.org/10.32737/2221-8688-2022-3-358-365.

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The phase composition of vanadium and vanadium-antimony-containing samples of γ-Al2O3 and the degree of oxidation of vanadium in them were examined by XRD and EPR methods, respectively. The data of XRD and EPR spectroscopy show the formation of highly dispersed vanadium-oxygen and vanadiumantimony-oxygen structures on the surface of the support. It is shown that the EPR spectra of the studied samples are due to "isolated" vanadium ions with an oxidation state of +4 in nonstoichiometric vanadium-oxygen and vanadium-antimony-oxygen formations with a square pyramid local environment structure wit

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Cao, Yingying, Lila Zhao, Fubing Wang, Huilin Su, and Limeng Zhu. "Effect of Oxidation on Physicochemical Properties and Structure of Mutton Myosin." Journal of Biobased Materials and Bioenergy 19, no. 1 (2025): 20–28. http://dx.doi.org/10.1166/jbmb.2025.2475.

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The physicochemical properties and structure of mutton myosin were investigated through the simulation of natural oxidation using a Fenton oxidation system. Various degrees of oxidation (0, 1, 5, 10, 15, and 20 mmol/L hydrogen peroxide solution) were employed to analyze the changes in myosin characteristics. The results pertaining to physicochemical properties revealed a decrease in myosin solubility and an increase in turbidity with escalating the degree of oxidation. Additionally, the water holding capacity of gels exhibited an initial increase followed by a subsequent decrease. The primary

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3

Burdette, D., and J. G. Zeikus. "Purification of acetaldehyde dehydrogenase and alcohol dehydrogenases from Thermoanaerobacter ethanolicus 39E and characterization of the secondary-alcohol dehydrogenase (2° Adh) as a bifunctional alcohol dehydrogenase-acetyl-CoA reductive thioesterase." Biochemical Journal 302, no. 1 (1994): 163–70. http://dx.doi.org/10.1042/bj3020163.

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The purification and characterization of three enzymes involved in ethanol formation from acetyl-CoA in Thermoanaerobacter ethanolicus 39E (formerly Clostridium thermohydrosulfuricum 39E) is described. The secondary-alcohol dehydrogenase (2 degrees Adh) was determined to be a homotetramer of 40 kDa subunits (SDS/PAGE) with a molecular mass of 160 kDa. The 2 degrees Adh had a lower catalytic efficiency for the oxidation of 1 degree alcohols, including ethanol, than for the oxidation of secondary (2 degrees) alcohols or the reduction of ketones or aldehydes. This enzyme possesses a significant a

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Li, Dahu, Fangjia Yang, Zhao Cao, Ruoqi Li, and Yiwen Hu. "The Effect of Oxidation on Coal’s Molecular Structure and the Structure Model Construction of Oxidized Coal Molecular." Processes 13, no. 1 (2025): 187. https://doi.org/10.3390/pr13010187.

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Three kinds of 1/3 coking coals with different degrees of oxidation were used for this study in Inner Mongolia, China. Using analytical testing methods such as X-ray photoelectron spectroscopy (XPS), nuclear magnetic resonance carbon spectroscopy (13C-NMR) and Fourier transform infrared spectroscopy (FT-IR), combined with computer-aided software such as Chemdraw, Materials Studio (2017), and MestRenova, three coal samples were characterized and analyzed. On this basis, the molecular formulas of three coal samples with different degrees of oxidation were constructed by optimizing the model ener

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Yin, Peng, Wen Zhou, Xin Dong, Bin Guo, and Yanan Huang. "Effect of Oxidized Wood Pulp Fibers on the Performance of the Thermoplastic Corn Starch Composites." Advances in Polymer Technology 2020 (July 8, 2020): 1–7. http://dx.doi.org/10.1155/2020/8976713.

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In this study, oxidized wood pulp fiber (OWPF) was prepared by oxidizing wood pulp fiber (WPF) with NaIO4, and OWPFs with different oxidation degrees were obtained and characterized by light microscope, XRD, and TG. Then, OWPFs with different oxidation degrees were incorporated into thermoplastic starch (TPS) to prepare OWPF/TPS composites. The cross-section morphology, water resistance, and physical and mechanical properties of the composites were investigated. SEM showed good dispersion of OWPF in the continuous TPS phase. The tensile strength of OWPF/TPS reached a maximum value of 5.02 MPa

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Volkova, Yu V., K. V. Sharun, L. L. Sukhova, H. V. Kosovtsova, S. I. Turchina, and D. A. Kashkalda. "Oxidative balance disorders as a factor of formation and progression of hypoandrogenism in boys." Ukrainian Journal of Pediatric Endocrinology, no. 1-2 (June 20, 2022): 21–25. http://dx.doi.org/10.30978/ujpe2022-1-2-21.

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Objective — to study the features of the state of oxidative balance (processes of free radical oxidation and antioxidant protection) in boys with hypoandrogenism (HA). Materials and methods. Examinations involved 103 adolescent boys agreed 14 to 17 years with the delayed sexual development. Serum levels of total testosterone (TT), conjugated dienes (CD), thiobarbituric acidreactive substance (TBARS), carbonylated proteins, reduced glutathione (GSH), glutathione peroxidase (GPx), superoxide dismutase (SOD) and catalase (CAT) activity were determined. The coefficient of oxidative stress was cal

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7

Петухова, Элина Азатовна, Валерия Сергеевна Ершова, Александр Владимирович Терентьев, et al. "Coulometric analysis method for determining the concentration and degree of oxidation of vanadium in the electrolyte of a vanadium flow battery using a hydrogen vanadium cell." Kondensirovannye sredy i mezhfaznye granitsy = Condensed Matter and Interphases 27, no. 1 (2024): 128–38. https://doi.org/10.17308/kcmf.2025.27/12490.

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Determining the vanadium content and the average degree of oxidation of vanadium ions in an electrolyte is a highly important task, both in the production and operation of vanadium flow batteries and in scientific research aimed at improving the performance characteristics of electrolytes throughout their entire life cycle. This article proposes a solution to this issue using the coulometric analysis of electrolyte samples circulating through a cell with a membrane-electrode unit consisting of a gas diffusion hydrogen electrode, a proton exchange membrane, and a liquid flow electrode. The coul

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8

Bychkov, V. Yu, Yu P. Tulenin, А. A. Gulin, and V. N. Korchak. "Variations of Cobalt Catalytic Activity and Selectivity in Ethylene Oxidation against Stepwise Oxidation of Cobalt Surface." Кинетика и катализ 64, no. 6 (2023): 785–97. http://dx.doi.org/10.31857/s0453881123060047.

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Catalytic activity of Co foil in ethylene oxidation was studied against oxidation degree of Co surface at stepwise foil oxidation. Experiments were conducted at temperatures of 500–800°C by a pulse method using alternative pulses of 0.2% C2H4–0.25% O2–1% Ar–He testing mixture and 1% O2–1% Ar–He oxidative mixture. Oxidation degree of Co foil varied from a totally reduced surface to an oxidation depth about a hundred of cobalt oxide “monolayers”. Using XRD, SEM and EDS, it was shown that CoO phase formed during a first stage of the stepwise oxidation (from 0 to ~60 oxide “monolayers”) at the all

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9

Carvalho, Alexandra, Mariana C. F. Costa, Valeria S. Marangoni, Pei Rou Ng, Thi Le Hang Nguyen, and Antonio H. Castro Neto. "The Degree of Oxidation of Graphene Oxide." Nanomaterials 11, no. 3 (2021): 560. http://dx.doi.org/10.3390/nano11030560.

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We show that the degree of oxidation of graphene oxide (GO) can be obtained by using a combination of state-of-the-art ab initio computational modeling and X-ray photoemission spectroscopy (XPS). We show that the shift of the XPS C1s peak relative to pristine graphene, ΔEC1s, can be described with high accuracy by ΔEC1s=A(cO−cl)2+E0, where c0 is the oxygen concentration, A=52.3 eV, cl=0.122, and E0=1.22 eV. Our results demonstrate a precise determination of the oxygen content of GO samples.

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10

Castro, Jorge Iván, Alana Payan-Valero, Carlos-Humberto Valencia-Llano, et al. "Graphene Oxide Nanosheets for Bone Tissue Regeneration." Molecules 29, no. 14 (2024): 3263. http://dx.doi.org/10.3390/molecules29143263.

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Bone tissue engineering is a promising alternative to repair wounds caused by cellular or physical accidents that humans face daily. In this sense, the search for new graphene oxide (GO) nanofillers related to their degree of oxidation is born as an alternative bioactive component in forming new scaffolds. In the present study, three different GOs were synthesized with varying degrees of oxidation and studied chemically and tissue-wise. The oxidation degree was determined through infrared (FTIR), X-ray diffraction (XRD), X-ray photoelectron (XPS), and Raman spectroscopy (RS). The morphology of

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11

Palaznik, O. M., P. M. Nedorezova, and V. G. Krasheninnikov. "Effect of Oxidation Temperature on the Crystalline Phase of Polypropylene in Composites with Single-Walled Carbon Nanotubes." Высокомолекулярные соединения А 65, no. 4 (2023): 296–305. http://dx.doi.org/10.31857/s2308112023700591.

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The effect of thermal oxidation on the crystalline phase of polypropylene in composites with single-walled carbon nanotubes has been studied. The composites are synthesized in propylene bulk using a homogeneous catalytic system rac-Me2Si(2-Me-4PhInd)2ZrCl2, activated by methylaluminoxane. The effect of thermal oxidation on thermophysical characteristics (the heat of melting and the melting temperature) measured by DSC and changes occurring in the polymer investigated by IR spectroscopy is studied. Changes in the structure of PP during thermo-oxidative degradation are studied by DSC at 140 and

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12

Roffman, E., and M. Wilchek. "The extent of oxidative mitogenesis does not correlate with the degree of aldehyde formation of the T lymphocyte membrane." Journal of Immunology 137, no. 1 (1986): 40–44. http://dx.doi.org/10.4049/jimmunol.137.1.40.

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Abstract Chemical oxidation of T lymphocytes with periodate or the combined action of the enzymes neuraminidase and galactose oxidase (NAGO) results in T cell activation. The latter process includes the production of interleukin 2 (IL 2) and the induction of IL 2 receptors. Because membrane-bound aldehydes act in the transmission of the oxidative mitogenic signal, we designed a comparative study in human thymocytes and peripheral blood leukocytes in order to determine a possible correlation between the degree of the membrane aldehydes generated chemically or enzymatically and the extent of the

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13

George, I. J., and J. P. D. Abbatt. "Chemical evolution of secondary organic aerosol from OH-initiated heterogeneous oxidation." Atmospheric Chemistry and Physics Discussions 10, no. 2 (2010): 3265–300. http://dx.doi.org/10.5194/acpd-10-3265-2010.

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Abstract. The heterogeneous oxidation of laboratory Secondary Organic Aerosol (SOA) particles by OH radicals was investigated. SOA particles, produced by reaction of α-pinene and O3, were exposed to OH radicals in a flow tube, and particle chemical composition, size, and hygroscopicity were measured to assess modifications due to oxidative aging. Aerosol Mass Spectrometer (AMS) mass spectra indicated that the degree of oxidation of SOA particles was significantly enhanced due to OH-initiated oxidation. Particle O/C ratios calculated from m/z 44 fraction from organic mass spectra rose by a maxi

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14

Potthast, Antje, Mirjana Kostic, Sonja Schiehser, Paul Kosma, and Thomas Rosenau. "Studies on oxidative modifications of cellulose in the periodate system: Molecular weight distribution and carbonyl group profiles." Holzforschung 61, no. 6 (2007): 662–67. http://dx.doi.org/10.1515/hf.2007.099.

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Abstract The effects of periodate oxidation on cellulose were studied by means of gel permeation chromatography (GPC) using multiple detection and carbonyl-selective fluorescence labeling according to the CCOA methodology profiling of carbonyl groups. At low degrees of oxidation, the molecular weight distribution was fully maintained. Upon more pronounced oxidation the molecular weight even increased due to cross-linking effects. More condensed structures were identified by means of light scattering. Periodate oxidation also affects crystalline regions of cellulose, as demonstrated by comparis

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15

Liepins, Kalvis, Aleksandrs Volperts, Galina Dobele, et al. "Enhancing the Wetting Properties of Activated Biochar by Oxidation with Hydrogen Peroxide." Chemistry 6, no. 5 (2024): 911–21. http://dx.doi.org/10.3390/chemistry6050053.

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In order to explore the possibilities of increasing the hydrophilicity of carbon-based adsorbents, catalysts, or electrode materials in aqueous solutions, the oxidation of wood-based activated biochar using H2O2 was investigated. The properties of oxidized activated biochar obtained at different activation temperatures (600, 700, and 800 °C) and H2O2 oxidized for 15–180 min were investigated using the characteristics of surface functionality, elemental composition, porous structure, contact angle measurements, FTIR spectroscopy, and immersion calorimetry. It was observed that the optimal oxida

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16

Motori, Antonio, Gian Carlo Montanari, Andrea Saccani, and Steve Giannoni. "Effect of recrystallization on the oxidative stability of poly(butylene terephthalate)." Journal of Materials Research 15, no. 1 (2000): 243–47. http://dx.doi.org/10.1557/jmr.2000.0039.

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The oxidative stability of poly(butylene terephthalate) was investigated over the range 175 to 220 °C by isothermal differential calorimetry. It is shown that this property is affected by a fast recrystallization process, which takes place between 200 and 220 °C, with a maximum around 208 °C. In fact, recrystallization produces an increase of the crystallinity degree of the polymer, which enhances its resistance to oxidation, as proven by the longer oxidation times detected.

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17

Liu, Li Lai, Mao Zhong An, Shan Chao Xing, Xiao Jun Shen, Chen Yang, and Xin Long Xu. "Preparation of Graphene Oxide Based on Expanded Graphite." Advanced Materials Research 881-883 (January 2014): 1083–88. http://dx.doi.org/10.4028/www.scientific.net/amr.881-883.1083.

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Graphene oxide with high degree of oxidation and peelable has been prepared by two-step oxidation method used large flake graphite. The expanded graphite was prepared firstly and then prepared graphene oxide via further oxidation. The influence of oxidation time, oxidant dosage and high temperature reaction on the structure and degree of oxidation were studied. The morphology and structure of graphene oxide were characterized by X-ray diffraction, fourier transform infrared spectra, scanning electron microscope and transmission electron microscope. It was found that high degree of oxidation an

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18

Liang, Huazhe, Meng Cao, Desheng Yang, Tingting Sun, Xiaomeng Chu, and Shaojie Liu. "Polyamidoamine Immobilized TEMPO Mediated Oxidation of Cellulose: Effect of Macromolecular Catalyst Structure on the Reaction Rate, Oxidation Degree and Degradation Degree." Fibers and Polymers 21, no. 6 (2020): 1251–58. http://dx.doi.org/10.1007/s12221-020-9859-y.

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19

Chursin, Vyacheslav I. "OXIDATIVE EPOXIDATION OF OLEOX AND VEGETABLE OILS." IZVESTIYA VYSSHIKH UCHEBNYKH ZAVEDENIY KHIMIYA KHIMICHESKAYA TEKHNOLOGIYA 60, no. 3 (2017): 83. http://dx.doi.org/10.6060/tcct.2017603.5441.

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We have studied the oxidative epoxidation product of ethoxylated oleic acid (oleox) and tonnage vegetable oils: sunflower, corn, rapeseed and flax. The oxidation was carried out using hydrogen peroxide, peracetic acid and performic, which were obtained in situ using the appropriate acids and concentrated aqueous solution of hydrogen peroxide. The kinetics of oxidation was evaluated on the accumulation of the peroxide compounds, the iodine value and the number of refractive index. The final oxidation products were examined for the content of epoxy and aldehyde groups. It was shown that at the e

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20

Shengnan Guan, Shengnan Guan, Wenzhi Li Wenzhi Li, Jianru Ma Jianru Ma, Qingchuan Liu Qingchuan Liu, and Kun Chen and Qi Zhang Kun Chen and Qi Zhang. "Potassium-Promoted Three-Dimensional Mesoporous Pt/MnO2 for Formaldehyde Elimination at Zero Degree." Journal of the chemical society of pakistan 42, no. 2 (2020): 188. http://dx.doi.org/10.52568/000638.

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In this work, three-dimensional mesoporous MnO2, K/MnO2, Pt/MnO2 and K-Pt/MnO2 catalysts were prepared through hard-template method. The additional K/Pt had significantly improved the HCHO oxidation activity. The K-Pt/MnO2 catalyzed complete HCHO oxidation was achieved at 0℃ with space velocity (GHSV) at 50000 ml/(gand#183;h). With the excellent catalytic performance, K-Pt/MnO2 exhibited a higher ratio of Oads(surface adsorbed oxygen)/Olatt(surface lattice oxygen) and Mn3+/Mn4+ ions than the other catalysts. Meanwhile, it was still stable after running a 70h reaction. Overall, the K-Pt/MnO2 wa

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21

Shengnan Guan, Shengnan Guan, Wenzhi Li Wenzhi Li, Jianru Ma Jianru Ma, Qingchuan Liu Qingchuan Liu, and Kun Chen and Qi Zhang Kun Chen and Qi Zhang. "Potassium-Promoted Three-Dimensional Mesoporous Pt/MnO2 for Formaldehyde Elimination at Zero Degree." Journal of the chemical society of pakistan 42, no. 2 (2020): 188. http://dx.doi.org/10.52568/000638/jcsp/42.02.2020.

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In this work, three-dimensional mesoporous MnO2, K/MnO2, Pt/MnO2 and K-Pt/MnO2 catalysts were prepared through hard-template method. The additional K/Pt had significantly improved the HCHO oxidation activity. The K-Pt/MnO2 catalyzed complete HCHO oxidation was achieved at 0℃ with space velocity (GHSV) at 50000 ml/(gand#183;h). With the excellent catalytic performance, K-Pt/MnO2 exhibited a higher ratio of Oads(surface adsorbed oxygen)/Olatt(surface lattice oxygen) and Mn3+/Mn4+ ions than the other catalysts. Meanwhile, it was still stable after running a 70h reaction. Overall, the K-Pt/MnO2 wa

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22

Radomskiy, S. M., and V. I. Radomskaya. "Surface structure of Amur region high grade native gold." Earth sciences and subsoil use 44, no. 1 (2021): 39–47. http://dx.doi.org/10.21285/2686-9993-2021-44-1-39-47.

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The purpose of the research is to study the surface structure of high grade gold. The subject of research is gold ore fields in the Amur region. The object of the study is samples of native high grade gold grains from these fields. The study uses the methods of thermodynamics and X-ray electron microscopy. The study results in revealing a multilayer structure of the surface of high grade minerals of the Amur region native gold with the following levels: a boundary layer with zero oxidation degree Au0 in the form of yellow metallic gold; an oxide layer with the oxidation degree Au+1 in the form

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23

Kang, E., D. W. Toohey, and W. H. Brune. "Dependence of SOA oxidation on organic aerosol mass concentration and OH exposure: experimental PAM chamber studies." Atmospheric Chemistry and Physics Discussions 10, no. 10 (2010): 24053–89. http://dx.doi.org/10.5194/acpd-10-24053-2010.

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Abstract. The oxidation of secondary organic aerosol (SOA) is studied with mass spectra analysis of SOA formed in a Potential Aerosol Mass (PAM) chamber, a small flow-through photo-oxidation chamber with extremely high OH and ozone levels. Oxidation for a few minutes in the PAM chamber is equivalent to days to weeks in the atmosphere. The mass spectra were measured with a Quadrupole Aerosol Mass Spectrometer (Q-AMS) for SOA formed from oxidation of α-pinene, m-xylene, p-xylene, and a mixture of the three. The organic mass fraction of m/z 44 (CO2+) and m/z 43 (mainly C2H3O+), named f44 and f43,

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24

Burkova, V. N., A. I. Vengerovsky, N. I. Suslov, et al. "New plant agents with cerebroprotective effect." Bulletin of Siberian Medicine 10, no. 5 (2011): 29–35. http://dx.doi.org/10.20538/1682-0363-2011-5-29-35.

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The meadowsweet (Filipendula vulgaris) extract in a greater degree, than valerian extract improves in albino rat's brain the kinetic characteristics of mitochondrion respiratory activity, increases the association of substrate oxidation with ADP phosphorylation in experimental posthypoxic encephalopathy. The nettle (Urtica dioica) extract increases in albino rat's brain the rate of cycle Krebs substrate utilization and oxidative phosphorylation coupling in experimental inhibition of fatty acids p-oxidation caused with 4-pentenoic acid. The meadowsweet and nettle extracts posses the expressed a

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25

Hu, Ming, Zhaowang Li, Xiaoming Gao, et al. "XPS Investigation of the Oxidation States of the As-Deposited Ta Films Prepared by Magnetron Sputtering Technology." Materials 16, no. 23 (2023): 7405. http://dx.doi.org/10.3390/ma16237405.

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Due to their versatile and unique properties, tantalum-based thin films have been extensively studied. However, tantalum is susceptible to oxidation due to its higher chemical activity, which is crucial regardless of whether oxidations of Ta are beneficial or detrimental. Therefore, the oxidation of Ta during material processing, especially without conscious means, should be taken seriously. In this study, pure Ta films were fabricated by magnetron sputtering under set procedure parameters. The effects of base pressure and substrate temperature on the degree of oxidation of Ta films were inves

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26

Kavuşan, H. S., S. Çalişkan, F. Turgut, and M. Serdaroğlu. "Exploring the effects of comminution level and natural antioxidant incorporation on the quality and oxidative stability of turkey meat system." Acta Universitatis Sapientiae, Alimentaria 16, no. 1 (2023): 32–48. http://dx.doi.org/10.2478/ausal-2023-0003.

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Abstract This study aimed to explore the effects of different comminution degrees and the incorporation of a natural antioxidant on the quality attributes and oxidative reactions of turkey meat. Four distinctive turkey meat systems were established, namely: 3 mm minced treatment (M), 3 mm minced treatment with the addition of 200 ppm gallic acid equivalent Aloe vera (Aloe barbadensis Mill.) extract (MA), fine-ground treatment (FM), and fine-ground treatment with the addition of 200 ppm gallic acid equivalent Aloe vera extract (FMA). The evaluation encompassed an in-depth analysis of various qu

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Kaczmarek, Łukasz, Tomasz Warga, Magdalena Makowicz, Karol Kyzioł, Bartosz Bucholc, and Łukasz Majchrzycki. "The Influence of the Size and Oxidation Degree of Graphene Flakes on the Process of Creating 3D Structures during Its Cross-Linking." Materials 13, no. 3 (2020): 681. http://dx.doi.org/10.3390/ma13030681.

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This article presents the results of the cross-linking of oxidized flake graphene (GO) using hydrazine at room temperature. Conducting the process at temperatures up to 30 °C allowed to eliminate the phenomenon of thermal GO reduction to its non-oxidized form. In addition, based on the Infrared and Raman spectroscopy as well as X-ray photoelectron spectroscopy (XPS) analysis, the cross-linking ability of GO was observed depending on its size and degree of oxidation. These parameters were associated with selected physicochemical and electrical properties of obtained 3D structures. Three GO flak

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Tanaka, Yoshiyuki, Hajime Miki, Gde Suyantara, Yuji Aoki, and Tsuyoshi Hirajima. "Mineralogical Prediction on the Flotation Behavior of Copper and Molybdenum Minerals from Blended Cu–Mo Ores in Seawater." Minerals 11, no. 8 (2021): 869. http://dx.doi.org/10.3390/min11080869.

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The copper ore in Chilean copper porphyry deposits is often associated with molybdenum minerals. This copper–molybdenum (Cu–Mo) sulfide ore is generally mined from various locations in the mining site; thus, the mineral composition, oxidation degree, mineral particle size, and grade vary. Therefore, in the mining operation, it is common to blend the ores mined from various spots and then process them using flotation. In this study, the floatability of five types of Cu–Mo ores and the blending of these ores in seawater was investigated. The oxidation degree of these Cu–Mo ores was evaluated, an

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29

Kleshnya, G. G., O. Yu Lavrova, N. M. Revenko, et al. "Determining the degree of coal oxidation at PAO AKKhZ." Coke and Chemistry 56, no. 11 (2013): 398–404. http://dx.doi.org/10.3103/s1068364x13110033.

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Simon, Heather, and Prakash V. Bhave. "Simulating the Degree of Oxidation in Atmospheric Organic Particles." Environmental Science & Technology 46, no. 1 (2011): 331–39. http://dx.doi.org/10.1021/es202361w.

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Moimane, Tiisetso, Yangyang Huai, and Yongjun Peng. "The critical degree of bornite surface oxidation in flotation." Minerals Engineering 155 (August 2020): 106445. http://dx.doi.org/10.1016/j.mineng.2020.106445.

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Gurov, V. N., V. G. Porkhun, F. I. Bashlii, V. D. Shalimov, and V. F. Isaenko. "Reducing the degree of oxidation of low-carbon steel." Metallurgist 33, no. 8 (1989): 153. http://dx.doi.org/10.1007/bf00750202.

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Kang, E., D. W. Toohey, and W. H. Brune. "Dependence of SOA oxidation on organic aerosol mass concentration and OH exposure: experimental PAM chamber studies." Atmospheric Chemistry and Physics 11, no. 4 (2011): 1837–52. http://dx.doi.org/10.5194/acp-11-1837-2011.

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Abstract. The oxidation of secondary organic aerosol (SOA) is studied with mass spectra analysis of SOA formed in a Potential Aerosol Mass (PAM) chamber, a small flow-through photo-oxidation chamber with extremely high OH and ozone levels. The OH exposure from a few minutes in the PAM chamber is similar to that from days to weeks in the atmosphere. The mass spectra were measured with a Quadrupole Aerosol Mass Spectrometer (Q-AMS) for SOA formed from oxidation of α-pinene, m-xylene, p-xylene, and a mixture of the three. The organic mass fractions of m/z 44 (CO2+) and m/z 43 (mainly C2H3O+), nam

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Lin, Zhi Tao, Bo Zhu, Xue Lin, Yang Chen, and Yu Zhen Liu. "Study on Surface Properties of PAN-Based Carbon Fiber Oxidized in a Static Electrochemical Oxidation Process." Advanced Materials Research 774-776 (September 2013): 1103–6. http://dx.doi.org/10.4028/www.scientific.net/amr.774-776.1103.

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PAN-based carbon fibers (CFs) were oxidized in a static electrochemical oxidation process. The surface color and chemical composition were investigated by means of digital camera and XPS. The results showed that, with the increasing distance from anodic roller, the surface color of CFs changed and the degree of oxidation got weaker and weaker. A close correlation was found between its surface color and chemical properties. It indicates that the electrochemical oxidation performance of one kind of carbon fiber can be handily studied using static electrochemical oxidation process because we can

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JANZEN, H. H. "ELEMENTAL SULFUR OXIDATION AS INFLUENCED BY PLANT GROWTH AND DEGREE OF DISPERSION WITHIN SOIL." Canadian Journal of Soil Science 70, no. 3 (1990): 499–502. http://dx.doi.org/10.4141/cjss90-049.

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Controlled environment studies were conducted to characterize the effects of cropping treatment and degree of particle dispersion on S oxidation rate. In two soils (a Chernozem and a Luvisol), S oxidation rates were not greatly affected by cropping treatment (barley, beans, canola, or fallow). In a second experiment, S oxidation was shown to approach maximum rates at a dispersion level of 1000 g soil g−1 S. Key words: Sulfur, placement, rhizosphere, fertilizer, elementals

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Zhou, Xuan, Aamir Iqbal, Jiaxing Li, et al. "Changes in Browning Degree and Reducibility of Polyphenols during Autoxidation and Enzymatic Oxidation." Antioxidants 10, no. 11 (2021): 1809. http://dx.doi.org/10.3390/antiox10111809.

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In the present study, the browning degree and reducing power of browning products of catechin (CT), epicatechin (EC), caffeic acid (CA), and chlorogenic acid (CGA) in autoxidation and enzymatic oxidation were investigated. Influencing factors were considered, such as pH, substrate species and composition, and eugenol. Results show that polyphenols’ autoxidation was intensified in an alkaline environment, but the reducing power was not improved. Products of enzymatic oxidation at a neutral pH have higher reducing power than autoxidation. In enzymatic oxidation, the browning degree of mixed subs

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Qin, Fang, Xue-Feng Liu, and Hao-En Mao. "The Thickness Distribution of Oxidation Film on Tapered Pipe Surface in Dieless Drawing." International Journal of Corrosion 2011 (2011): 1–5. http://dx.doi.org/10.1155/2011/615197.

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The thickness distribution of oxidation film on the surface of AISI304 stainless steel tapered pipe, its influence factors, and the effect of metal matrix deformation on oxidation behavior during dieless drawing were studied in this paper. The results showed that oxidation rate was affected strongly by induction heating temperature and deformation degree. The thickness distribution of oxidation film was uneven and increased from the larger diameter end to the smaller diameter end along the axial direction of tapered pipe. When induction heating temperature raised or the distance between heat a

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Talybova, Kh I., S. F. Ahmadbeyova, N. K. Andryushchenko, Z. B. Babaeva, L. M. Mirzaeva, and S. G. Unusov. "Oxidative desulphurization of gasoline fractions from Azerbaijani oils." Azerbaijan Oil Industry, no. 5 (May 15, 2020): 48–52. http://dx.doi.org/10.37474/0365-8554/2020-5-48-52.

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The paper studies the process of oxidative desulphurization of catalytic cracking and coking gasoline types and their close cut fractions. Direct oxidation studies of these gasoline fractions using hydrogen peroxide in the presence of heterogenic catalysts containing Mo and Co ions have been carried out for the oxidation of sulfur compounds and their further extraction via ion fluids enabling extraction of sulfur-organic compounds in the form of concentrates of oily sulfoxides and sulfanoles. Thus, desulfurization degree of gasoline fractions comprises 70-80 % - ultimately without change in ga

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Saito, Eduardo, Vagner Eduardo Caetano, Erica Freire Antunes, et al. "Electric Double Layer Capacitor of Multiwall Carbon Nanotubes under Different Degree of Acid Oxidations." Materials Science Forum 802 (December 2014): 186–91. http://dx.doi.org/10.4028/www.scientific.net/msf.802.186.

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Carbon nanotubes (CNT) are a material with unique properties (mechanical, electrical, electrochemical, etc) allied with low density and high specific area. The present paper studied the electrochemical properties of carbon nanotubes growth by Chemical Vapor Depostion (CVD) technique. The samples were characterized by SEM, Raman Spectroscopy and the double layer capacitance of the powders was evaluated in a Teflon capacitor system with a Ag/AgCl (3M) as reference electrode. The catalyst remotion is provided in Hydrochloric acid washing and the wet oxidative treatments promotes the CNT oxidation

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Gu, Wen, Yuan Tu, Shuangshuang Yuan, et al. "Preparation and properties of walnut cake-based wood adhesive with oxidation modification." BioResources 19, no. 3 (2024): 5497–510. http://dx.doi.org/10.15376/biores.19.3.5497-5510.

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Walnut cake has the potential for use in preparing wood adhesives because of its richness in protein and carbohydrate. In this work, walnut cakes were treated with sodium periodate or potassium permanganate and then were directly used as wood adhesives. Their bonding properties, curing performances, thermal properties, and chemical structures were compared. The results showed that: (1) The oxidation by KMnO4was non-selective. The reaction was very intense, accompanied by the great variability of oxidation degree and degradation degree, enormous viscosity of oxidation products, high coating dif

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Zheng, Heng, Oday Daghagheleh, Thomas Wolfinger, Bernd Taferner, Johannes Schenk, and Runsheng Xu. "Fluidization behavior and reduction kinetics of pre-oxidized magnetite-based iron ore in a hydrogen-induced fluidized bed." International Journal of Minerals, Metallurgy and Materials 29, no. 10 (2022): 1873–81. http://dx.doi.org/10.1007/s12613-022-2511-7.

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AbstractThe influence of different pre-oxidation temperatures and pre-oxidation degrees on the reduction and fluidization behaviors of magnetite-based iron ore was investigated in a hydrogen-induced fluidized bed. The raw magnetite-based iron ore was pre-oxidized at 800 and 1000°C for a certain time to reach a partly oxidation and deeply oxidation state. The structure and morphology of the reduced particles were analyzed via optical microscope and scanning electron microscopy (SEM). The reaction kinetic mechanism was determined based on the double-logarithm analysis. The results indicate that

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Zhao, Wei, Bo Zhu, Yang Chen, Qiang Wang, Kun Qiao, and Yi Min Wu. "The Oxidation Erosion in Carbon Materials for CZ Furnace." Advanced Materials Research 602-604 (December 2012): 1359–63. http://dx.doi.org/10.4028/www.scientific.net/amr.602-604.1359.

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In this work, on the basis of carbon materials microstructure and morphology, we study on the influence of carbon fiber content , graphite degree and metal impurities on oxidation performance of carbon materials. The result of oxidation test shows that there are more crystal defects at the interface of carbon fiber and carbon matrix, and oxidation activity of carbon atoms near the area of crystal defects is higher than others.Carbon materials with higher fiber content and higher graphite degree, has a better anti-oxidation performance. The presence of impurities, especially metal impurities pl

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Li, Gui-Yang, and J. L. Koenig. "FT-IR Imaging of the Thermal Oxidation of Polyisoprene (PI) Rubber at High Temperature." Applied Spectroscopy 56, no. 11 (2002): 1390–96. http://dx.doi.org/10.1366/00037020260377670.

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The thermal aging of PI rubber in hot air (140 °C) has been studied using the FT-IR imaging technique. From the analysis of the FT-IR images of the absorbance of the carbonyl (C=O) groups, it was found that the most significant thermal oxidation occurred at the surface of the rubber with a decreasing gradient of oxidation from the surface to the interior of the system. The hydroxyl (OH) groups followed the same pattern as the carbonyl groups. The C=C double bonds decreased from the interior of rubber to the surface, demonstrating the existence of a highly cross-linked oxidative coating, which

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Jiang, Junfei, Xingying Ji, Qingyan Ling, et al. "Influence of Carbon Particle Characteristics on Oxidative Filtration Under Biomass Gasification Gas Atmosphere." Energies 18, no. 5 (2025): 1015. https://doi.org/10.3390/en18051015.

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The oxidation of filter cake particles (FCPs) is beneficial for preventing filter media blockage during the hot filtration of raw biomass gasification gas. The influence of particle characteristics on hot oxidative filtration was investigated through characterization, kinetic study, and lab-scale experiments. The characterization results indicated that FCPs are particles with C content of more than 60%, containing –CHn and C=O functional groups. After pyrolysis treatment, these functional groups gradually diminished, while the degree of atomic nucleus condensation increased. The oxidation kine

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Wang, Yu, and Xianglin Zhou. "Molecular Dynamics Simulation of Fe-Based Metal Powder Oxidation during Laser Powder Bed Fusion." Materials 15, no. 18 (2022): 6394. http://dx.doi.org/10.3390/ma15186394.

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Because the laser powder bed fusion process is generally completed in a confined space and in a very short time, it is difficult to study material oxidation during this process using traditional methods. To address this knowledge gap, in this work, we used molecular dynamics (MDs) based on a reaction force field (ReaxFF) to clarify the atomic-level interaction mechanism between metal atoms and oxygen molecules during laser powder bed fusion. The ReaxFF potential energy model has variable charges that can dynamically handle charge changes between atoms and the breaking and formation of chemical

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George, I. J., and J. P. D. Abbatt. "Chemical evolution of secondary organic aerosol from OH-initiated heterogeneous oxidation." Atmospheric Chemistry and Physics 10, no. 12 (2010): 5551–63. http://dx.doi.org/10.5194/acp-10-5551-2010.

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Abstract. The heterogeneous oxidation of laboratory Secondary Organic Aerosol (SOA) particles by OH radicals was investigated. SOA particles, produced by reaction of α-pinene and O3, were exposed to OH radicals in a flow tube, and particle chemical composition, size, and hygroscopicity were measured to assess modifications due to oxidative aging. Aerosol Mass Spectrometer (AMS) mass spectra indicated that the degree of oxidation of 200 nm diameter SOA particles was significantly enhanced due to OH-initiated oxidation, as evidenced by the increase in the fraction of m/z 44 fragment of total org

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Lou, Kang, Feng Hui Wang, Yong Jun Lu, and Xiang Zhao. "Effect of inhomogeneous re-oxidation on Ni-based SOFC oxidation resistance." International Journal of Modern Physics B 30, no. 27 (2016): 1650200. http://dx.doi.org/10.1142/s0217979216502003.

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Inhomogeneous re-oxidation, which causes graded NiO content along anode thickness, has been confirmed to be a key reason for Ni-based cell cracking during redox progress. In this paper, an analytical model is developed to estimate the impact of inhomogeneous re-oxidation on Ni-based solid oxide fuel cell (SOFC) oxidation resistance. And experiments, in which the SOFC was partially re-oxidized, were implemented for model trial. Model results show that electrolyte internal stress can be significantly reduced (from 367 MPa to 135 MPa, when the oxidation degree is 60%), and the electrolyte can rem

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Spivak, M. Y., V. G. Kaplunenko, M. V. Kosinov, and A. V. Skalny. "ANTIVIRAL, ANTIOXIDANT AND CATALYTIC ACTIVITY OF TRACE ELEMENTS IN A LOW DEGREE OF OXIDATION." Trace Elements in Medicine (Moscow) 21, no. 3 (2020): 3–23. http://dx.doi.org/10.19112/2413-6174-2020-21-3-3-23.

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The review article studies the role of trace elements in protecting the body from viruses and focuses on the high antiviral activity of trace elements, which they exhibit if they are in a low degree of oxidation. Trace elements in a degree of oxidation make it possible to create new generation of antiseptics safe for humans. Has been discovered the mechanism of antiviral action of trace elements in a low degree of oxidation based on the suppression of electrostatic Coulomb interaction of virus with the cell. Sanitizers of a new generation can become effective prophylactic means for protecting

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Wang, Shuang, Meng Sui, Huilong Luo, Fashe Li, and Yuling Zhai. "The study on the influence of oxidation degree and temperature on the viscosity of biodiesel." Green Processing and Synthesis 9, no. 1 (2020): 182–90. http://dx.doi.org/10.1515/gps-2020-0019.

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AbstractJatropha curcas biodiesel was taken as the research object, studied the single and compound effects of oxidation degree and temperature on kinematic viscosity of biodiesel, and established a mathematical model. The results indicate that the kinematic viscosity of biodiesel decreases gradually with the increase of temperature, and the mathematical model affected by the single factor of temperature is η = e(A + Bt + Ct2) . The kinematic viscosity of biodiesel increases with the increase of oxidation time. The regression equation between kinematic viscosity and conductivity is established

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Chen, Zhigang, Qiaoling Yuan, Guangren Xu, Huiyu Chen, Hongyu Lei, and Jianming Su. "Effects of Quercetin on Proliferation and H2O2-Induced Apoptosis of Intestinal Porcine Enterocyte Cells." Molecules 23, no. 8 (2018): 2012. http://dx.doi.org/10.3390/molecules23082012.

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Weanling stress and toxicosis, which are harmful to the health of pigs’ intestines, are associated with oxidative stress. Quercetin (Que) is a polyphenolic compound that shows good anti-cancer, anti-inflammation and anti-oxidation effects. This study aimed to elaborate whether or not Que promotes IPEC-J2 (intestinal porcine enterocyte cells) proliferation and protects IPEC-J2 from oxidative damage. Thus, we examined the effects of Que on proliferation and H2O2-induced apoptosis in IPEC-J2. The results showed that Que increased IPEC-J2 viabililty, propelled cells from G1 phase into S phase and

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