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Journal articles on the topic 'Electron-mediated processes'

Author: Grafiati

Published: 4 June 2021

Last updated: 1 February 2022

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1

Zbigniew Grobelny, Andrzej Stolarzewicz, Andrzej Swinarew, Marcin Szczepanski, and Adalbert Maercker. "Electron-Transfer Processes Mediated by Alkalides: A Critical Approach." Mini-Reviews in Organic Chemistry 4, no. 3 (2007): 254–67. http://dx.doi.org/10.2174/157019307781369913.

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Wu, Yundang, Wei Liu, Tongxu Liu, et al. "Sustainable Electron Shuttling Processes Mediated by In Situ- Deposited Phenoxazine." ChemElectroChem 5, no. 16 (2018): 2171–75. http://dx.doi.org/10.1002/celc.201800470.

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3

Heelis, Paul F., Rosemarie F. Hartman, and Seth D. Rose. "Energy and electron transfer processes in flavoprotein-mediated DNA repair." Journal of Photochemistry and Photobiology A: Chemistry 95, no. 1 (1996): 89–98. http://dx.doi.org/10.1016/1010-6030(95)04229-6.

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4

Meirovich, Matan M., Oren Bachar, and Omer Yehezkeli. "Artificial, Photoinduced Activation of Nitrogenase Using Directed and Mediated Electron Transfer Processes." Catalysts 10, no. 9 (2020): 979. http://dx.doi.org/10.3390/catal10090979.

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Nitrogenase, a bacteria-based enzyme, is the sole enzyme that is able to generate ammonia by atmospheric nitrogen fixation. Thus, improved understanding of its utilization and developing methods to artificially activate it may contribute to basic research, as well as to the design of future artificial systems. Here, we present methods to artificially activate nitrogenase using photoinduced reactions. Two nitrogenase variants originating from Azotobacter vinelandii were examined using photoactivated CdS nanoparticles (NPs) capped with thioglycolic acid (TGA) or 2-mercaptoethanol (ME) ligands. T

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5

Lambert, Christoph, Gilbert Nöll, and Jürgen Schelter. "Bridge-mediated hopping or superexchange electron-transfer processes in bis(triarylamine) systems." Nature Materials 1, no. 1 (2002): 69–73. http://dx.doi.org/10.1038/nmat706.

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6

Calderazzo, Fausto, Guido Pampaloni, Maurizio Lanfranchi, and Giancarlo Pelizzi. "Proton- and carbonyl-mediated electron transfer processes from the hexacarbonylvanadate(−I) anion." Journal of Organometallic Chemistry 296, no. 1-2 (1985): 1–13. http://dx.doi.org/10.1016/0022-328x(85)80335-1.

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7

Basak, Shyam, Laura Winfrey, Betty A. Kustiana, Rebecca L. Melen, Louis C. Morrill, and Alexander P. Pulis. "Electron deficient borane-mediated hydride abstraction in amines: stoichiometric and catalytic processes." Chemical Society Reviews 50, no. 6 (2021): 3720–37. http://dx.doi.org/10.1039/d0cs00531b.

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Borane mediated hydride abstraction of amines efficiently generates useful iminium salts. This review explores this fascinating reactivity and discusses how the iminium intermediates are utilised in a variety of stoichiometric and catalytic processes.

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8

Morris, Kristy, Huijun Zhao, and Richard John. "Ferricyanide-Mediated Microbial Reactions for Environmental Monitoring." Australian Journal of Chemistry 58, no. 4 (2005): 237. http://dx.doi.org/10.1071/ch05038.

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The ability of microorganisms to use ferricyanide as an alternative electron acceptor for respiratory processes has been known for nearly 100 years. More recently, the use of ferricyanide-mediated bioreactions for environmental monitoring has received much attention. This paper reviews the recent developments of these mediated microbial processes for rapid biochemical oxygen demand analysis and direct toxicity assessment during the past five years. The ability of eukaryotic microorganisms to use ferricyanide as an alternative electron acceptor for a range of applications is also described.

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9

Bouwer, Edward J., and Gordon D. Cobb. "Modeling of Biological Processes in the Subsurface." Water Science and Technology 19, no. 5-6 (1987): 769–79. http://dx.doi.org/10.2166/wst.1987.0255.

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Biofilm processes are potentially important for transformations of organic micropollutants in groundwater. The type of electron acceptor used by the microorganisms is an important environmental factor affecting biotransformation. A fundamental model of biofilm kinetics is shown to be capable of simulating microbially-mediated changes in a subsurface system of primary substrates and mixed electron acceptors. The model incorporates external mass transport effects, Monod kinetics with determination of limiting electron donor or acceptor, and competitive and sequential microbial reactions. The sys

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10

Wang, Xin-Nan, Guo-Xin Sun, Xiao-Ming Li, Thomas A. Clarke, and Yong-Guan Zhu. "Electron shuttle-mediated microbial Fe(III) reduction under alkaline conditions." Journal of Soils and Sediments 18, no. 1 (2017): 159–68. http://dx.doi.org/10.1007/s11368-017-1736-y.

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11

Varley, Thomas S., Meetal Hirani, George Harrison, and Katherine B. Holt. "Nanodiamond surface redox chemistry: influence of physicochemical properties on catalytic processes." Faraday Discuss. 172 (2014): 349–64. http://dx.doi.org/10.1039/c4fd00041b.

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Modification of an electrode with an immobilised layer of nanodiamond is found to significantly enhance the recorded currents for reversible oxidation of ferrocene methanol (FcMeOH). Current enhancement is related to nanodiamond diameter, with enhancement increasing in the order 1000 nm < 250 nm < 100 nm < 10 nm < 5 nm. We attribute the current enhancement to two catalytic processes: i) electron transfer between the solution redox species and redox-active groups on the nanodiamond surface; ii) electron transfer mediated by FcMeOH<sup>+</sup> adsorbed onto the nanodiamond surface. T

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12

Astruc, D. "Organometallic chemistry at the nanoscale. Dendrimers for redox processes and catalysis." Pure and Applied Chemistry 75, no. 4 (2003): 461–81. http://dx.doi.org/10.1351/pac200375040461.

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An overview of the metal-mediated synthesis and use of nanosized metallodendrimers is given with emphasis on electron-transfer processes (molecular batteries consisting in dendrimers decorated with a large number of equivalent redox-active centers) and catalytic reactions (electron-transfer-chain catalytic synthesis of dendrimers decorated with ruthenium carbonyl clusters, redox catalysis of nitrate and nitrite electroreduction in water by star-shape hexanuclear catalysts).

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13

Park, Jung Su, Elizabeth Karnas, Kei Ohkubo, et al. "Ion-Mediated Electron Transfer in a Supramolecular Donor-Acceptor Ensemble." Science 329, no. 5997 (2010): 1324–27. http://dx.doi.org/10.1126/science.1192044.

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Ion binding often mediates electron transfer in biological systems as a cofactor strategy, either as a promoter or as an inhibitor. However, it has rarely, if ever, been exploited for that purpose in synthetic host-guest assemblies. We report here that strong binding of specific anions (chloride, bromide, and methylsulfate but not tetrafluoroborate or hexafluorophosphate) to a tetrathiafulvalene calix[4]pyrrole (TTF-C4P) donor enforces a host conformation that favors electron transfer to a bisimidazolium quinone (BIQ2+) guest acceptor. In contrast, the addition of a tetraethylammonium cation,

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14

Wu, Yundang, Wei Liu, Tongxu Liu, et al. "Cover Feature: Sustainable Electron Shuttling Processes Mediated by In Situ- Deposited Phenoxazine (ChemElectroChem 16/2018)." ChemElectroChem 5, no. 16 (2018): 2159. http://dx.doi.org/10.1002/celc.201800897.

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15

Popov, V. N. "Possible role of free oxidation processes in the regulation of reactive oxygen species production in plant mitochondria." Biochemical Society Transactions 31, no. 6 (2003): 1316–17. http://dx.doi.org/10.1042/bst0311316.

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The non-coupled substrate oxidation mediated by components of the electron transport chain that are not coupled to energy accumulation (such as plant alternative oxidase and rotenone-insensitive NADH dehydrogenases) and uncoupled respiration are peculiar features of plant mitochondria. The physiological significance of such energy-wasting oxidation processes is still debated. It is proposed that non-coupled oxidation could regulate the level of reduction of components of the electron transport chain and the rate of one-electron reduction of oxygen, thereby affecting the rate of formation of re

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16

Woo, L. Keith, James G. Goll, Donald J. Czapla, and J. Alan Hays. "Thermodynamic and kinetic aspects of two- and three-electron redox processes mediated by nitrogen atom transfer." Journal of the American Chemical Society 113, no. 22 (1991): 8478–84. http://dx.doi.org/10.1021/ja00022a040.

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17

SCHWEINZER, Esther, and Hans GOLDENBERG. "Ascorbate-mediated transmembrane electron transport and ascorbate uptake in leukemic cell lines are two different processes." European Journal of Biochemistry 206, no. 3 (1992): 807–12. http://dx.doi.org/10.1111/j.1432-1033.1992.tb16988.x.

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18

Martin, Aiden A., James Bishop, Wayne Burnett, et al. "Ultra-high aspect ratio pores milled in diamond via laser, ion and electron beam mediated processes." Diamond and Related Materials 105 (May 2020): 107806. http://dx.doi.org/10.1016/j.diamond.2020.107806.

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19

Kanyanee, Tinakorn, Philip J. Fletcher, Elena Madrid, and Frank Marken. "Indirect (hydrogen-driven) electrodeposition of porous silver onto a palladium membrane." Journal of Solid State Electrochemistry 24, no. 11-12 (2020): 2789–96. http://dx.doi.org/10.1007/s10008-020-04592-4.

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Abstract Hydrogen permeation through a pure palladium film (25 μm thickness, optically dense) is employed to trigger electron transfer (hydrogen-driven) reactions at the external palladium | aqueous electrolyte interface of a two-compartment electrochemical cell. Two systems are investigated to demonstrate feasibility for (i) indirect hydrogen-mediated silver electrodeposition with externally applied potential and (ii) indirect hydrogen-mediated silver electrodeposition driven by external formic acid decomposition. In both cases, porous metal deposits form as observed by optical and electron m

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20

Na, M. X., A. K. Mills, F. Boschini, et al. "Direct determination of mode-projected electron-phonon coupling in the time domain." Science 366, no. 6470 (2019): 1231–36. http://dx.doi.org/10.1126/science.aaw1662.

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Ultrafast spectroscopies have become an important tool for elucidating the microscopic description and dynamical properties of quantum materials. In particular, by tracking the dynamics of nonthermal electrons, a material’s dominant scattering processes can be revealed. Here, we present a method for extracting the electron-phonon coupling strength in the time domain, using time- and angle-resolved photoemission spectroscopy (TR-ARPES). This method is demonstrated in graphite, where we investigate the dynamics of photoinjected electrons at the K¯ point, detecting quantized energy-loss processes

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21

YU, YINXI, HAOBIN WANG, and SHAOWEI CHEN. "COMPUTATIONAL STUDY OF BRIDGE-MEDIATED INTERVALENCE ELECTRON TRANSFER II: COUPLINGS IN DIFFERENT METALLOCENE COMPLEXES." Journal of Theoretical and Computational Chemistry 11, no. 06 (2012): 1341–56. http://dx.doi.org/10.1142/s0219633612500915.

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The constrained density functional theory (CDFT) was used to study bridge-mediated electron transfer processes in mixed-valence systems with two identical metallocene (cobaltocene, ruthenocene, and nickelocene) moieties linked by various bridge structures. Based on the electronic coupling matrix elements obtained from the CDFT calculations, the relationship between the bridge linkage and the effectiveness of intervalence transfer was discussed.

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22

Li, Q., and K. T. Leung. "Thermally induced chemistry and electron-mediated processes of pyridine on (2×1) and modified Si() surfaces: evidence of electron-induced condensation oligomerization." Surface Science 541, no. 1-3 (2003): 113–27. http://dx.doi.org/10.1016/s0039-6028(03)00890-2.

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23

Treumann, R. A., and W. Baumjohann. "Plasma wave mediated attractive potentials: a prerequisite for electron compound formation." Annales Geophysicae 32, no. 8 (2014): 975–89. http://dx.doi.org/10.5194/angeo-32-975-2014.

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Abstract. Coagulation of electrons to form macro-electrons or compounds in high temperature plasma is not generally expected to occur. Here we investigate, based on earlier work, the possibility for such electron compound formation (non-quantum "pairing") mediated in the presence of various kinds of plasma waves via the generation of attractive electrostatic potentials, the necessary condition for coagulation. We confirm the possibility of production of attractive potential forces in ion- and electron-acoustic waves, pointing out the importance of the former and expected consequences. While el

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24

Espinosa, Arturo, Celia Gómez, and Rainer Streubel. "Single Electron Transfer-Mediated Selectiveendo- andexocyclic Bond Cleavage Processes in Azaphosphiridine Chromium(0) Complexes: A Computational Study." Inorganic Chemistry 51, no. 13 (2012): 7250–56. http://dx.doi.org/10.1021/ic300522g.

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25

Inoue, Haruo, Shigeaki Funyu, Yutaka Shimada, and Shinsuke Takagi. "Artificial photosynthesis via two-electron conversion: Photochemical oxygenation sensitized by ruthenium porphyrins with water as both electron and oxygen atom donor." Pure and Applied Chemistry 77, no. 6 (2005): 1019–33. http://dx.doi.org/10.1351/pac200577061019.

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Recent progress in the field of artificial photosynthesis is reviewed. Among various approaches to oxidizing the water molecule, attention has been focused on the two-electron chemical conversion processes mediated by metallo-porphyrins upon visible light irradiation. Photochemical oxygenation reactions such as the epoxidation of alkenes sensitized by ruthenium(II) porphyrins with water as both electron and oxygen atom donor have been found. Ru porphyrin induces highly efficient two-electron oxidation of water with a quantum yield of 60 % to form an epoxide from the alkene with high selectivit

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26

Chen, Jing, Nannan Wu, Xinxin Xu, et al. "Fe(VI)-Mediated Single-Electron Coupling Processes for the Removal of Chlorophene: A Combined Experimental and Computational Study." Environmental Science & Technology 52, no. 21 (2018): 12592–601. http://dx.doi.org/10.1021/acs.est.8b01830.

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27

Sumi, Hitoshi, and Toshiaki Kakitani. "Unified Theory on Rates for Electron Transfer Mediated by a Midway Molecule, Bridging between Superexchange and Sequential Processes." Journal of Physical Chemistry B 113, no. 38 (2009): 12852. http://dx.doi.org/10.1021/jp9076195.

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28

Sumi, Hitoshi, and Toshiaki Kakitani. "Unified Theory on Rates for Electron Transfer Mediated by a Midway Molecule, Bridging between Superexchange and Sequential Processes." Journal of Physical Chemistry B 105, no. 39 (2001): 9603–22. http://dx.doi.org/10.1021/jp010018b.

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29

Tachikawa, Takashi, Sachiko Tojo, Mamoru Fujitsuka, and Tetsuro Majima. "One-Electron Redox Processes during Polyoxometalate-Mediated Photocatalytic Reactions of TiO2 Studied by Two-Color Two-Laser Flash Photolysis." Chemistry - A European Journal 12, no. 11 (2006): 3124–31. http://dx.doi.org/10.1002/chem.200501077.

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30

Fagnoni, Maurizio, Stefano Protti, Davide Ravelli, and Angelo Albini. "Spectroscopic characterization of photoaccumulated radical anions: a litmus test to evaluate the efficiency of photoinduced electron transfer (PET) processes." Beilstein Journal of Organic Chemistry 9 (April 24, 2013): 800–808. http://dx.doi.org/10.3762/bjoc.9.91.

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Steady-state irradiation in neat acetonitrile of some aromatic nitriles, imides and esters (10−5–10−3 M solution) in the presence of tertiary amines allowed the accumulation of the corresponding radical anions, up to quantitative yield for polysubstituted benzenes and partially with naphthalene and anthracene derivatives. The condition for such an accumulation was that the donor radical cation underwent further evolution that precluded back electron transfer and any chemical reaction with the radical anion. In fact, no accumulation occurred with 1,4-diazabicyclo[2.2.2]octane (DABCO), for which

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31

Chen, Shing-Der, Chiu-Yang Chen, and Yu-Feng Wang. "Treating high-strength nitrate wastewater by three biological processes." Water Science and Technology 39, no. 10-11 (1999): 311–14. http://dx.doi.org/10.2166/wst.1999.0672.

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Three different types of bioreactors including an activated sludge reactor (ASR), a biologically mediated activated carbon fluidized bed reactor (BAFBR) and an upflow immobilized cell reactor (UICR) were studied. The results suggest that the carbon-nitrogen equivalent (CNE) ratio (in terms of CODN) when using ASR to treat the wastewater will decrease as the sludge age increases while it will increase slightly as the influent concentration increases. The CNE ratios for BAFBR and UICR are 3.67 and 3.61 respectively. For the test between the two different growth types, the CNE ratio of suspended

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32

MA, Jun, Sergey A. Denisov, Amitava Adhikary, and Mehran Mostafavi. "Ultrafast Processes Occurring in Radiolysis of Highly Concentrated Solutions of Nucleosides/Tides." International Journal of Molecular Sciences 20, no. 19 (2019): 4963. http://dx.doi.org/10.3390/ijms20194963.

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Among the radicals (hydroxyl radical (•OH), hydrogen atom (H•), and solvated electron (esol−)) that are generated via water radiolysis, •OH has been shown to be the main transient species responsible for radiation damage to DNA via the indirect effect. Reactions of these radicals with DNA-model systems (bases, nucleosides, nucleotides, polynucleotides of defined sequences, single stranded (ss) and double stranded (ds) highly polymeric DNA, nucleohistones) were extensively investigated. The timescale of the reactions of these radicals with DNA-models range from nanoseconds (ns) to microseconds

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Sinclair, R., Kyung Hoon Min, and U. Kwon. "Application of In Situ HREM to Study Crystallization in Materials." Materials Science Forum 494 (September 2005): 7–12. http://dx.doi.org/10.4028/www.scientific.net/msf.494.7.

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A review is given of the application of in situ transmission electron microscopy to study various processes associated with the crystallization of amorphous thin films. Solid phase epitaxial regrowth of ion-implanted silicon is compared with nucleation and growth in deposited thin films. The mechanism of metal-mediated crystallization is deduced directly from high resolution recordings, and the kinetics of tantalum oxide devitrefication are obtained. The advantages of direct in situ observation are described

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34

Armstrong, Fraser A., H. Allen O. Hill, and Nicholas J. Walton. "Reactions of electron-transfer proteins at electrodes." Quarterly Reviews of Biophysics 18, no. 3 (1985): 261–322. http://dx.doi.org/10.1017/s0033583500000366.

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Studies of electron-transfer reactions of redox proteins have, in recent years, attracted widespread interest and attention. Progress has been evident from both physical and biological standpoints, with the increasing availability of three-dimensional structural data for many small electron-transfer proteins prompting a variety of systematic investigations (Isied, 1985). Most recently, attention has been directed towards questions concerning the elementary transfer of electrons between spatially remote redox sites, and the nature of protein–protein interactions which, for intermolecular proces

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35

Subramanian, Palaniappan, Dalila Meziane, Robert Wojcieszak, Franck Dumeignil, Rabah Boukherroub, and Sabine Szunerits. "Plasmon-Induced Electrocatalysis with Multi-Component Nanostructures." Materials 12, no. 1 (2018): 43. http://dx.doi.org/10.3390/ma12010043.

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Noble metal nanostructures are exceptional light absorbing systems, in which electron–hole pairs can be formed and used as “hot” charge carriers for catalytic applications. The main goal of the emerging field of plasmon-induced catalysis is to design a novel way of finely tuning the activity and selectivity of heterogeneous catalysts. The designed strategies for the preparation of plasmonic nanomaterials for catalytic systems are highly crucial to achieve improvement in the performance of targeted catalytic reactions and processes. While there is a growing number of composite materials for pho

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36

Yang, Hailin, Shan Yu, and Hailong Lu. "Iron-Coupled Anaerobic Oxidation of Methane in Marine Sediments: A Review." Journal of Marine Science and Engineering 9, no. 8 (2021): 875. http://dx.doi.org/10.3390/jmse9080875.

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Anaerobic oxidation of methane (AOM) is one of the major processes of oxidizing methane in marine sediments. Up to now, extensive studies about AOM coupled to sulfate reduction have been conducted because SO42− is the most abundant electron acceptor in seawater and shallow marine sediments. However, other terminal electron acceptors of AOM, such as NO3−, NO2−, Mn(IV), Fe(III), are more energetically favorable than SO42−. Iron oxides, part of the major components in deep marine sediments, might play a significant role as an electron acceptor in the AOM process, mainly below the sulfate–methane

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37

Liwo, A., D. Jeziorek, T. Ossowski, et al. "Molecular modeling of singlet-oxygen binding to anthraquinones in relation to the peroxidating activity of antitumor anthraquinone drugs." Acta Biochimica Polonica 42, no. 4 (1995): 445–56. http://dx.doi.org/10.18388/abp.1995_4898.

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Anthraquinone derivatives are important anti-cancer drugs possessing, however, undesirable peroxidating and, in consequence, cardiotoxic properties. This results from the mediation by these compounds of the one-electron reduction processes of the oxygen molecule, which produces the highly toxic superoxide anion radical and other active oxygen species. This article summarizes the results of our studies on the molecular aspects of the mechanism of anthraquinone-mediated peroxidation which were carried out using enzymatic-assay, electrochemical, and quantum-mechanical methods.

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38

Baran, Wojciech, Mateusz Cholewiński, Andrzej Sobczak, and Ewa Adamek. "A New Mechanism of the Selective Photodegradation of Antibiotics in the Catalytic System Containing TiO2 and the Inorganic Cations." International Journal of Molecular Sciences 22, no. 16 (2021): 8696. http://dx.doi.org/10.3390/ijms22168696.

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The mechanism of sulfisoxazole (SFF) selective removal by photocatalysis in the presence of titanium (IV) oxide (TiO2) and iron (III) chloride (FeCl3) was explained and the kinetics and degradation pathways of SFF and other antibiotics were compared. The effects of selected inorganic ions, oxygen conditions, pH, sorption processes and formation of coordination compounds on the photocatalytic process in the presence of TiO2 were also determined. The Fe3+ compounds added to the irradiated sulfonamide (SN) solution underwent surface sorption on TiO2 particles and act as acceptors of excited elect

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Lutz, Lukas, Walid Dachraoui, Arnaud Demortière, et al. "Operando Monitoring of the Solution-Mediated Discharge and Charge Processes in a Na–O2 Battery Using Liquid-Electrochemical Transmission Electron Microscopy." Nano Letters 18, no. 2 (2018): 1280–89. http://dx.doi.org/10.1021/acs.nanolett.7b04937.

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40

Cianciolo, Rachel E., and J. Charles Jennette. "Glomerulonephritis in Animal Models and Human Medicine: Discovery, Pathogenesis, and Diagnostics." Toxicologic Pathology 46, no. 8 (2018): 898–903. http://dx.doi.org/10.1177/0192623318800714.

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Glomerulonephritis (GN) is inflammation of glomeruli. The four major categories that cause human GN are mediated by immunoglobulin or complement or both, and they include (1) immune complex–mediated GN, (2) anti-glomerular basement membrane–mediated GN, (3) antineutrophil cytoplasmic autoantibody–mediated GN, and (4) complement factor 3 glomerulopathy mediated by complement dysregulation. Initiating processes include infection, autoimmunity, exogenous antigens, and neoplasia. Often there are predisposing and modulating genetic, epigenetic, and/or environmental factors. Animal models facilitate

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41

Claassen, Horst, Martin Schicht, Bernd Fleiner, et al. "Different Patterns of Cartilage Mineralization Analyzed by Comparison of Human, Porcine, and Bovine Laryngeal Cartilages." Journal of Histochemistry & Cytochemistry 65, no. 6 (2017): 367–79. http://dx.doi.org/10.1369/0022155417703025.

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Laryngeal cartilages undergo a slow ossification process during aging, making them an excellent model for studying cartilage mineralization and ossification processes. Pig laryngeal cartilages are similar to their human counterparts in shape and size, also undergo mineralization, facilitating the study of cartilage mineralization. We investigated the processes of cartilage mineralization and ossification and compared these with the known processes in growth plates. Thyroid cartilages from glutaraldehyde-perfused male minipigs and from domestic pigs were used for X-ray, light microscopic, and t

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42

He, Zhenhua, and K. T. Leung. "Vibrational electron energy loss studies of surface processes on Si(111)7×7 and vitreous SiO2 ion-mediated in CF4 and CH2F2." Surface Science 523, no. 1-2 (2003): 48–58. http://dx.doi.org/10.1016/s0039-6028(02)02351-8.

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43

Ghiuta, Ioana, Catalin Croitoru, Joseph Kost, Rodica Wenkert, and Daniel Munteanu. "Bacteria-Mediated Synthesis of Silver and Silver Chloride Nanoparticles and Their Antimicrobial Activity." Applied Sciences 11, no. 7 (2021): 3134. http://dx.doi.org/10.3390/app11073134.

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Within the frame of this work, the synthesis of silver nanoparticles (Ag NPs) and silver chloride nanoparticles (AgCl NPs) as mediated by microbes has been investigated. The nanoparticles were reduced from a silver nitrate precursor by the presence of bacteria, like Raoultella planticola and Pantoea agglomerans. The results show that the characteristic surface plasmon resonance absorption band occurs at about 440 nm. Nanoparticles were also characterized with the help of scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), transmission electron microscopy (TEM), and X-ray

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44

Sachs, Marlies, Sebastian Wetzel, Julia Reichelt, et al. "ADAM10-Mediated Ectodomain Shedding Is an Essential Driver of Podocyte Damage." Journal of the American Society of Nephrology 32, no. 6 (2021): 1389–408. http://dx.doi.org/10.1681/asn.2020081213.

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BackgroundPodocytes embrace the glomerular capillaries with foot processes, which are interconnected by a specialized adherens junction to ultimately form the filtration barrier. Altered adhesion and loss are common features of podocyte injury, which could be mediated by shedding of cell-adhesion molecules through the regulated activity of cell surface–expressed proteases. A Disintegrin and Metalloproteinase 10 (ADAM10) is such a protease known to mediate ectodomain shedding of adhesion molecules, among others. Here we evaluate the involvement of ADAM10 in the process of antibody-induced podoc

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45

Beratan, David N. "Why Are DNA and Protein Electron Transfer So Different?" Annual Review of Physical Chemistry 70, no. 1 (2019): 71–97. http://dx.doi.org/10.1146/annurev-physchem-042018-052353.

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The corpus of electron transfer (ET) theory provides considerable power to describe the kinetics and dynamics of electron flow at the nanoscale. How is it, then, that nucleic acid (NA) ET continues to surprise, while protein-mediated ET is relatively free of mechanistic bombshells? I suggest that this difference originates in the distinct electronic energy landscapes for the two classes of reactions. In proteins, the donor/acceptor-to-bridge energy gap is typically several-fold larger than in NAs. NA ET can access tunneling, hopping, and resonant transport among the bases, and fluctuations can

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Rodriguez Corral, Javier, Helen Mitrani, Martyn Dade-Robertson, Meng Zhang, and Pietro Maiello. "Agarose gel as a soil analogue for development of advanced bio-mediated soil improvement methods." Canadian Geotechnical Journal 57, no. 12 (2020): 2010–19. http://dx.doi.org/10.1139/cgj-2019-0496.

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Bio-mediated soil improvement methods (those that use biological processes) have potentially low cost and environmental impact, but can be difficult to control to ensure effective results, especially if engineered bacteria are used. A novel application of using agarose gel as a soil analogue is proposed, which can enable development of advanced bio-mediated soil improvement methods by reproducing relevant mechanical properties while allowing complex biological processes to be studied in detail, before testing in soils. It is envisaged that agarose gel will be used instead of soil when developi

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Rhodes, Christopher J. "Reactive Radicals on Reactive Surfaces: Heterogeneous Processes in Catalysis and Environmental Pollution Control." Progress in Reaction Kinetics and Mechanism 30, no. 3 (2005): 145–213. http://dx.doi.org/10.3184/007967405779134038.

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Many reactions that occur on solid surfaces are mediated by free radicals. A review is presented of both mechanistic and practical investigations in relation to catalysis and environmental applications. The review begins with actual imaging of surface adsorbed reactive radicals using scanning tunnelling microscopy (STM), and then discusses a range of examples, mainly as underpinned by electron spin resonance (ESR) measurements. Included are surface defects and their reactions, studies of the redox behaviour of zeolites, and the use of radicals adsorbed in zeolites as molecular surface probes o

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Moskovits, Martin. "Canada’s early contributions to plasmonics." Canadian Journal of Chemistry 97, no. 6 (2019): 483–87. http://dx.doi.org/10.1139/cjc-2018-0365.

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The field of plasmonics — the study of collective electron excitation in nanostructured metal and other conductors — is currently highly active with research foci in a number of related fields, including plasmon-enhanced spectroscopies and plasmon-mediated photochemical and photocatalytic processes through which the energy stored temporarily as plasmons can be used to enable and (or) accelerate photochemistry. This enhancement is accomplished either by the action of the large optical fields produced in the vicinity of plasmonic nanostructures or mediated by the energetic electrons and holes su

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Brizhik, Larissa S. "EFFECTS OF MAGNETIC FIELDS ON SOLITON MEDIATED CHARGE TRANSPORT IN BIOLOGICAL SYSTEMS." JOURNAL OF ADVANCES IN PHYSICS 6, no. 2 (2014): 1191–201. http://dx.doi.org/10.24297/jap.v6i2.1795.

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In this paper, we analyze biological effects produced by magnetic fields in order to elucidate the physical mechanisms, which can produce them. We show that there is a chierarchy of such mechanisms and that the mutual interplay between them can result in the synergetic outcome. In particular, we analyze the biological effects of magnetic fields on soliton mediated charge transport in the redox processes in living organisms. Such solitons are described by nonlinear systems of equations and represent electrons that are self-trapped in alpha-helical polypeptides due to the moderately strong elect

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Huang, Yuh-Chin T., Joleen Soukup, Shirley Harder, and Susanne Becker. "Mitochondrial oxidant production by a pollutant dust and NO-mediated apoptosis in human alveolar macrophage." American Journal of Physiology-Cell Physiology 284, no. 1 (2003): C24—C32. http://dx.doi.org/10.1152/ajpcell.00139.2002.

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Residual oil fly ash (ROFA) is a pollutant dust that stimulates production of reactive oxygen species (ROS) from mitochondria and apoptosis in alveolar macrophages (AM), but the relationship between these two processes is unclear. In this study, human AM were incubated with ROFA or vanadyl sulfate (VOSO4), the major metal constituent in ROFA, with or without nitro-l-arginine methyl ester (l-NAME), diphenyleneiodonium (DPI), and mitochondrial electron transport inhibitors. Interactions among production of ROS, nitric oxide (NO), and apoptosis of AM were determined. ROFA-stimulated ROS productio

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