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Journal articles on the topic 'Iron oxide cluster'

Author: Grafiati

Published: 4 June 2021

Last updated: 3 February 2022

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1

Cheng, Zishuo, Aaron P. Landry, Yiming Wang, and Huangen Ding. "Binding of Nitric Oxide in CDGSH-type [2Fe-2S] Clusters of the Human Mitochondrial Protein Miner2." Journal of Biological Chemistry 292, no. 8 (2017): 3146–53. http://dx.doi.org/10.1074/jbc.m116.766774.

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Iron-sulfur proteins are among the primary targets of nitric oxide in cells. Previous studies have shown that iron-sulfur clusters hosted by cysteine residues in proteins are readily disrupted by nitric oxide forming a protein-bound dinitrosyl iron complex, thiolate-bridged di-iron tetranitrosyl complex, or octanitrosyl cluster. Here we report that human mitochondrial protein Miner2 [2Fe-2S] clusters can bind nitric oxide without disruption of the clusters. Miner2 is a member of a new CDGSH iron-sulfur protein family that also includes two mitochondrial proteins: the type II diabetes-related m

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2

Molek, K. S., C. Anfuso-Cleary, and M. A. Duncan. "Photodissociation of Iron Oxide Cluster Cations†." Journal of Physical Chemistry A 112, no. 39 (2008): 9238–47. http://dx.doi.org/10.1021/jp8009436.

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3

Vystavel, T., S. A. Koch, G. Palasantzas, and J. Th M. De Hosson. "In situ Transmission Electron Microscopy Studies on Structural Dynamics of Transition Metal Nanoclusters." Journal of Materials Research 20, no. 7 (2005): 1785–91. http://dx.doi.org/10.1557/jmr.2005.0222.

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The structural stability of transition metal nanoclusters has been scrutinized with in situ transmission electron microscopy as a function of temperature. In particular iron, cobalt, niobium, and molybdenum clusters with diameters around 5 nm have been investigated. During exposure to air, a thin oxide shell with a thickness of 2 nm is formed around the iron and cobalt clusters, which is thermally unstable under moderate high vacuum annealing above 200 °C. Interestingly, niobium clusters oxidize only internally at higher temperatures without the formation of an oxide shell. They are unaffected

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4

Garcia, Jacob M., Ryan E. Shaffer, and Scott G. Sayres. "Ultrafast pump–probe spectroscopy of neutral FenOm clusters (n, m < 16)." Physical Chemistry Chemical Physics 22, no. 42 (2020): 24624–32. http://dx.doi.org/10.1039/d0cp03889j.

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5

Duan, Xuewu, Juanjuan Yang, Binbin Ren, Guoqiang Tan, and Huangen Ding. "Reactivity of nitric oxide with the [4Fe–4S] cluster of dihydroxyacid dehydratase from Escherichia coli." Biochemical Journal 417, no. 3 (2009): 783–89. http://dx.doi.org/10.1042/bj20081423.

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Although the NO (nitric oxide)-mediated modification of iron–sulfur proteins has been well-documented in bacteria and mammalian cells, specific reactivity of NO with iron–sulfur proteins still remains elusive. In the present study, we report the first kinetic characterization of the reaction between NO and iron–sulfur clusters in protein using the Escherichia coli IlvD (dihydroxyacid dehydratase) [4Fe–4S] cluster as an example. Combining a sensitive NO electrode with EPR (electron paramagnetic resonance) spectroscopy and an enzyme activity assay, we demonstrate that NO is rapidly consumed by t

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6

Takahashi, Keisuke. "Iron oxide cluster induced barrier-free conversion of nitric oxide to ammonia." Chemical Communications 51, no. 19 (2015): 4062–64. http://dx.doi.org/10.1039/c4cc09467k.

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7

Xie, Xuan, and Chunfu Zhang. "Controllable Assembly of Hydrophobic Superparamagnetic Iron Oxide Nanoparticle with mPEG-PLA Copolymer and Its Effect on MR Transverse Relaxation Rate." Journal of Nanomaterials 2011 (2011): 1–7. http://dx.doi.org/10.1155/2011/152524.

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Assembly of individual superparamagnetic iron oxide nanoparticles (SPION) into cluster is an effective way to prepare MRI contrast agent with high relaxivity. In this study, we fabricated SPION clusters with different sizes and configurations by assembly of amphiphilic mPEG-PLA copolymer with hydrophobic SPION in aqueous solution. The evolution of cluster size and configuration with the amount of copolymer and the effect of cluster size on the transverse relaxivity was studied.T2relaxation rates of clusters with different sizes at iron concentration of 0.1 mM were compared with the theoretical

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8

Landry, Aaron P., and Huangen Ding. "The N-Terminal Domain of Human DNA Helicase Rtel1 Contains a Redox Active Iron-Sulfur Cluster." BioMed Research International 2014 (2014): 1–8. http://dx.doi.org/10.1155/2014/285791.

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Human telomere length regulator Rtel1 is a superfamily II DNA helicase and is essential for maintaining proper length of telomeres in chromosomes. Here we report that the N-terminal domain of human Rtel1 (RtelN) expressed inEscherichia colicells produces a protein that contains a redox active iron-sulfur cluster with the redox midpoint potential of −248 ± 10 mV (pH 8.0). The iron-sulfur cluster in RtelN is sensitive to hydrogen peroxide and nitric oxide, indicating that reactive oxygen/nitrogen species may modulate the DNA helicase activity of Rtel1 via modification of its iron-sulfur cluster.

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9

Nolan, Michael, Anna Iwaszuk, and Hiroaki Tada. "Molecular Metal Oxide Cluster-Surface Modified Titanium(IV) Dioxide Photocatalysts." Australian Journal of Chemistry 65, no. 6 (2012): 624. http://dx.doi.org/10.1071/ch11451.

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The surface modification of TiO2 with molecular sized metal oxide clusters has recently been shown to be a promising approach for providing TiO2 with visible-light activity and/or improved UV activity. This short review summarizes the effects of the surface modification of TiO2 with the oxides of iron and tin selected from d- and p-blocks, respectively, on the photocatalytic activity. Fe(acac)3 and [Sn(acac)2]Cl2 chemisorption on the TiO2 surface occurs by ligand-exchange and ion-exchange, respectively. Taking advantage of the strong adsorption, we formed extremely small metal oxide clusters o

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10

Deng, Qianjun, Jiming Wang, Guangzhao Li, and Shuhua Zhang. "Synthesis, structure and magnetism of a new ionic pentanuclear iron cluster." Acta Crystallographica Section C Structural Chemistry 76, no. 7 (2020): 690–94. http://dx.doi.org/10.1107/s205322962000861x.

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A new ionic pentanuclear FeIII cluster, namely, triethylazanium tetrakis(μ2-5-amino-1,2,3,4-tetrazolido)tetrakis(μ3-4-chloro-2-{[(1H-tetrazol-1-id-5-yl)imino]methyl}phenolato)di-μ3-oxido-pentairon(III) acetonitrile monosolvate monohydrate, (C6H16N)[Fe5(C8H4ClN5O)4(CH2N5)4O2]·CH3CN·H2O, was synthesized using microvial synthesis methods and characterized by elemental analysis, FT–IR spectroscopy, single-crystal X-ray diffraction and thermogravimetric analysis. Magnetic studies reveal that the complex displays dominant antiferromagnetic intracluster interactions between the FeIII ions through the

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11

Kourdioukov, Alexandre I., Vener F. Khayrutdinov, Farid M. Gumerov, Zufar I. Zaripov, Asia R. Gabitova, and Almaz U. Aetov. "DFT study of homolytic scission of C–H bonds of alkanes and propylene glycol dehydrogenation reactions on Fe4O7, NiFe3O7 clusters and their protonated and hydroxylated forms." Butlerov Communications 64, no. 10 (2020): 119–35. http://dx.doi.org/10.37952/roi-jbc-01/20-64-10-119.

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The results of a DFT study of elementary acts, both catalytic transformations of alkanes on hydride-hydroxyl forms of Fe4O7 and NiFe3O7 clusters, and processes of hydrocarbons transformation on iron and nickel-oxide clusters without initially hydride-hydroxyl filling are presented. Homolytic scission of the C–H bonds of alkanes on the hydride-hydroxyl form of the Fe4O7 cluster is accompanied by the formation of alkyl radicals capable of biradicals recombination according to the singlet type. There is also an additional reaction direction, which is represented by a singlet intra-associative rea

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12

Jackson, Phillip, Jeremy N. Harvey, Detlef Schröder, and Helmut Schwarz. "Structure and reactivity of the prototype iron–oxide cluster Fe2O2+." International Journal of Mass Spectrometry 204, no. 1-3 (2001): 233–45. http://dx.doi.org/10.1016/s1387-3806(00)00361-4.

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13

Peng, D. L., T. Asai, N. Nozawa, T. Hihara, and K. Sumiyama. "Magnetic properties and magnetoresistance in small iron oxide cluster assemblies." Applied Physics Letters 81, no. 24 (2002): 4598–600. http://dx.doi.org/10.1063/1.1528725.

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14

Luchini, Alessandra, Richard K. Heenan, Luigi Paduano, and Giuseppe Vitiello. "Functionalized SPIONs: the surfactant nature modulates the self-assembly and cluster formation." Physical Chemistry Chemical Physics 18, no. 27 (2016): 18441–49. http://dx.doi.org/10.1039/c6cp01694d.

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15

Werner, Ernst R. "Three classes of tetrahydrobiopterin-dependent enzymes." Pteridines 24, no. 1 (2013): 7–11. http://dx.doi.org/10.1515/pterid-2013-0003.

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AbstractCurrent knowledge distinguishes three classes of tetrahydrobiopterin-dependent enzymes as based on protein sequence similarity. These three protein sequence clusters hydroxylate three types of substrate atoms and use three different forms of iron for catalysis. The first class to be discovered was the aromatic amino acid hydroxylases, which, in mammals, include phenylalanine hydroxylase, tyrosine hydroxylase, and two isoforms of tryptophan hydroxylases. The protein sequences of these tetrahydrobiopterin-dependent aromatic amino acid hydroxylases are significantly similar, and all mamma

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16

Gutsev, G. L., K. G. Belay, L. G. Gutsev, B. R. Ramachandran, and P. Jena. "Effect of hydrogenation on the structure and magnetic properties of an iron oxide cluster." Physical Chemistry Chemical Physics 20, no. 6 (2018): 4546–53. http://dx.doi.org/10.1039/c7cp08224j.

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17

Mozayyeni, Neda, Ali Morsali, Mohammad Reza Bozorgmehr, and Safar Ali Beyramabadi. "Mechanistic and energetic studies of superparamagnetic iron oxide nanoparticles as a cyclophosphamide anticancer drug nanocarrier: A quantum mechanical approach." Progress in Reaction Kinetics and Mechanism 44, no. 1 (2019): 92–101. http://dx.doi.org/10.1177/1468678319825689.

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Using Fe6(OH)18(H2O)6 as a ring cluster model for superparamagnetic iron oxide nanoparticles, noncovalent configurations and three mechanisms of covalent functionalization of superparamagnetic iron oxide nanoparticles with cyclophosphamide an anticancer drug were studied. Quantum molecular descriptors, solvation, and binding energies of noncovalent interactions were investigated the in gas and solution phases at the B3LYP and M06-2X density functional levels. In the vicinity of superparamagnetic iron oxide nanoparticles, the reactivity of the drug increases, showing cyclophosphamide can probab

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18

Ohshimo, Keijiro, Tatsuya Komukai, Ryoichi Moriyama, and Fuminori Misaizu. "Isomer Separation of Iron Oxide Cluster Cations by Ion Mobility Mass Spectrometry." Journal of Physical Chemistry A 118, no. 22 (2014): 3899–905. http://dx.doi.org/10.1021/jp5015687.

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19

Yang, Caixia, Gan Lin, Congqing Zhu, et al. "Metalla-aromatic loaded magnetic nanoparticles for MRI/photoacoustic imaging-guided cancer phototherapy." Journal of Materials Chemistry B 6, no. 17 (2018): 2528–35. http://dx.doi.org/10.1039/c7tb02145c.

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In this study, metalla-aromatic agents and a cluster of superparamagnetic iron oxide nanoparticles were loaded inside a micellar carrier and used for MRI/PA imaging-guided PTT/PDT synergistic cancer therapy.

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20

Avugadda, Sahitya Kumar, Sameera Wickramasinghe, Dina Niculaes, et al. "Uncovering the Magnetic Particle Imaging and Magnetic Resonance Imaging Features of Iron Oxide Nanocube Clusters." Nanomaterials 11, no. 1 (2020): 62. http://dx.doi.org/10.3390/nano11010062.

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Multifunctional imaging nanoprobes continue to garner strong interest for their great potential in the detection and monitoring of cancer. In this study, we investigate a series of spatially arranged iron oxide nanocube-based clusters (i.e., chain-like dimer/trimer, centrosymmetric clusters, and enzymatically cleavable two-dimensional clusters) as magnetic particle imaging and magnetic resonance imaging probes. Our findings demonstrate that the short nanocube chain assemblies exhibit remarkable magnetic particle imaging signal enhancement with respect to the individually dispersed or the centr

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21

Gassen, River, Dennis Thompkins, Austin Routt, et al. "Optical Imaging of Magnetic Particle Cluster Oscillation and Rotation in Glycerol." Journal of Imaging 7, no. 5 (2021): 82. http://dx.doi.org/10.3390/jimaging7050082.

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Magnetic particles have been evaluated for their biomedical applications as a drug delivery system to treat asthma and other lung diseases. In this study, ferromagnetic barium hexaferrite (BaFe12O19) and iron oxide (Fe3O4) particles were suspended in water or glycerol, as glycerol can be 1000 times more viscous than water. The particle concentration was 2.50 mg/mL for BaFe12O19 particle clusters and 1.00 mg/mL for Fe3O4 particle clusters. The magnetic particle cluster cross-sectional area ranged from 15 to 1000 μμm2, and the particle cluster diameter ranged from 5 to 45 μμm. The magnetic parti

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22

Dvoretskii, Nikolai V., Lyubov G. Anikanova, and Zoya G. Malysheva. "TYPES OF ACTIVE CENTERS ON SURFACE OF PROMOTED IRON OXIDE CATALYST." IZVESTIYA VYSSHIKH UCHEBNYKH ZAVEDENIY KHIMIYA KHIMICHESKAYA TEKHNOLOGIYA 61, no. 6 (2018): 61. http://dx.doi.org/10.6060/tcct.20186106.5658.

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The phase and chemical composition of compounds in the potassium-iron-oxygen system in a wide range of molar ratios of potassium and iron was studied by X-ray phase analysis and atomic absorption spectroscopy. The catalytic properties and the mass fraction of coke deposits on ferritic systems of various composition are determined. It has been shown that at least two types of active sites are present on the surface of the iron oxide catalyst. The dehydrogenation centers include oxygen ion, ions of a promoting alkali metal, and ions of bivalent and triply charged iron, between which electron exc

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23

Rugiel, Marzena, Agnieszka Drozdz, Katarzyna Matusiak, Zuzanna Setkowicz, Krzysztof Klodowski, and Joanna Chwiej. "Organ Metallome Processed with Chemometric Methods Enable the Determination of Elements that May Serve as Markers of Exposure to Iron Oxide Nanoparticles in Male Rats." Biological Trace Element Research 198, no. 2 (2020): 602–16. http://dx.doi.org/10.1007/s12011-020-02104-z.

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Abstract The systemic influence of iron oxide nanoparticles on the elemental homeostasis of key organs was examined in male rats. In tissues taken at different intervals from nanoparticles injection, the dynamics of elemental changes was analyzed. The organ metallome was studied using total reflection X-ray fluorescence. The obtained data were processed with advanced cluster and discriminant analyses—to classify the tissues according to their organs of origin and to distinguish accurately the nanoparticle-treated and normal rats. Additionally, in the case of liver and heart, it was possible to

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24

Furukawa, T., H. Kohno, R. Tokunaga, and S. Taketani. "Nitric oxide-mediated inactivation of mammalian ferrochelatase in vivo and in vitro: possible involvement of the iron-sulphur cluster of the enzyme." Biochemical Journal 310, no. 2 (1995): 533–38. http://dx.doi.org/10.1042/bj3100533.

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To investigate the role of the iron-sulphur cluster in mammalian ferrochelatases, the terminal enzyme of the haem biosynthetic pathway, we examined the interaction of nitric oxide (NO) and ferrochelatase. When macrophage cell line RAW 264.7 cells were treated with interferon-gamma and lipopolysaccharide NO synthesis in the cells was stimulated, and a decrease in ferrochelatase activity was observed, with no change in the amount of ferrochelatase. The addition of NG-monomethyl-L-arginine, a selective inhibitor of NO synthesis, reduced the effect of interferon-gamma and lipopolysaccharide, while

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25

Anjass, Montaha H., Katharina Kastner, Florian Nägele, et al. "Stabilization of Low-Valent Iron(I) in a High-Valent Vanadium(V) Oxide Cluster." Angewandte Chemie International Edition 56, no. 46 (2017): 14749–52. http://dx.doi.org/10.1002/anie.201706828.

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26

Antony, Jiji, Joseph Nutting, Donald R. Baer, Daniel Meyer, Amit Sharma, and You Qiang. "Size-Dependent Specific Surface Area of Nanoporous Film Assembled by Core-Shell Iron Nanoclusters." Journal of Nanomaterials 2006 (2006): 1–4. http://dx.doi.org/10.1155/jnm/2006/54961.

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Nanoporous films of core-shell iron nanoclusters have improved possibilities for remediation, chemical reactivity rate, and environmentally favorable reaction pathways. Conventional methods often have difficulties to yield stable monodispersed core-shell nanoparticles. We produced core-shell nanoclusters by a cluster source that utilizes combination of Fe target sputtering along with gas aggregations in an inert atmosphere at7∘C. Sizes of core-shell iron-iron oxide nanoclusters are observed with transmission electron microscopy (TEM). The specific surface areas of the porous films obtained fro

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27

Jacobson, D. B., and B. S. Freiser. "Transition-metal cluster ions in the gas phase. Oxide chemistry of dimeric and trimeric clusters containing iron and cobalt." Journal of the American Chemical Society 108, no. 1 (1986): 27–30. http://dx.doi.org/10.1021/ja00261a006.

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28

Smith, Laura J., Melanie R. Stapleton, Gavin J. M. Fullstone, et al. "Mycobacterium tuberculosis WhiB1 is an essential DNA-binding protein with a nitric oxide-sensitive iron–sulfur cluster." Biochemical Journal 432, no. 3 (2010): 417–27. http://dx.doi.org/10.1042/bj20101440.

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Mycobacterium tuberculosis is a major pathogen that has the ability to establish, and emerge from, a persistent state. Wbl family proteins are associated with developmental processes in actinomycetes, and M. tuberculosis has seven such proteins. In the present study it is shown that the M. tuberculosis H37Rv whiB1 gene is essential. The WhiB1 protein possesses a [4Fe-4S]2+ cluster that is stable in air but reacts rapidly with eight equivalents of nitric oxide to yield two dinuclear dinitrosyl-iron thiol complexes. The [4Fe-4S] form of WhiB1 did not bind whiB1 promoter DNA, but the reduced and

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29

Hosono, K., K. Matsubara, H. Takaoka, and T. Takagi. "Magneto-optical properties of iron oxide (FeOx) films prepared by reactive ionized cluster beam technique." Journal of the Magnetics Society of Japan 9, no. 2 (1985): 137–40. http://dx.doi.org/10.3379/jmsjmag.9.137.

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30

Soum, Emmanuelle, Xavier Brazzolotto, Charilaos Goussias, et al. "Peroxynitrite and Nitric Oxide Differently Target the Iron−Sulfur Cluster and Amino Acid Residues of Human Iron Regulatory Protein 1†." Biochemistry 42, no. 25 (2003): 7648–54. http://dx.doi.org/10.1021/bi030041i.

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31

Pegelow, U., M. Winterer, B. D. Mosel, M. Schmalzb, and R. Schöllhorn. "Mössbauer Studies of Nickel-Iron Hydrotalcites." Zeitschrift für Naturforschung A 49, no. 12 (1994): 1200–1206. http://dx.doi.org/10.1515/zna-1994-1215.

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Abstract Hydrotalcite-like Fe-Ni-hydroxides [Ni2/3IIFe1/3III(OH)2](CO3)1/6(H2O)y , [Ni3/4IIFe1/4III(OH)2]-(CO3)1/8(H2O)y and [Ni3/4II/IIIFe1/4III(OH)2](CO3)0.14(H20)y as well as the ternary oxide NaNi2/3Fe1/3O2 have been studied by 57Fe-Mössbauer spectroscopy. All samples contain Fe3+ in a high spin state. The quadrupole interaction is smaller if a magnetic splitting is present, which may indicate a non-parallel arrangement of the principal axis of the EFG and the hyperfine field. The temperature dependence of the spectra has been understood in terms of collective cluster excitations. In this

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32

Pantopoulos, K., G. Weiss, and M. W. Hentze. "Nitric oxide and oxidative stress (H2O2) control mammalian iron metabolism by different pathways." Molecular and Cellular Biology 16, no. 7 (1996): 3781–88. http://dx.doi.org/10.1128/mcb.16.7.3781.

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Several cellular mRNAs are regulated posttranscriptionally by iron-responsive elements (IREs) and the cytosolic IRE-binding proteins IRP-1 and IRP-2. Three different signals are known to elicit IRP-1 activity and thus regulate IRE-containing mRNAs: iron deficiency, nitric oxide (NO), and the reactive oxygen intermediate hydrogen peroxide (H2O2). In this report, we characterize the pathways for IRP-1 regulation by NO and H2O2 and examine their effects on IRP-2. We show that the responses of IRP-1 and IRP-2 to NO remarkably resemble those elicited by iron deficiency: IRP-1 induction by NO and by

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33

Esquenazi, Gibran, and Andrew Barron. "Investigation of the Reduction of a Molybdenum/Iron Molecular Nanocluster Single Source Precursor." Inorganics 6, no. 4 (2018): 104. http://dx.doi.org/10.3390/inorganics6040104.

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The thermolysis of the polyoxometalate cluster [HxPMo12O40⊂H4Mo72Fe30(O2CMe)15O254(H2O)90−y(EtOH)y] (1) under air, argon, and reducing conditions (5%, 10%, 50% H2 with Ar balance) has been investigated. The resulting products have been characterized by XRD, SEM, and EDX analysis. Thermolysis in air at 1100 °C yields predominantly Fe2O3, due to sublimation of the molybdenum component; however, under Ar atmosphere, the mixed metal oxide (Fe2Mo3O8) is formed along with Mo and MoO2. Introduction of 5% H2 (1100 °C) results in the alloy Fe2Mo3 in addition to Fe2Mo3O8 and Mo; in contrast, reduction a

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Balcells, Lluís, Carlos Martínez-Boubeta, José Cisneros-Fernández, et al. "One-Step Route to Iron Oxide Hollow Nanocuboids by Cluster Condensation: Implementation in Water Remediation Technology." ACS Applied Materials & Interfaces 8, no. 42 (2016): 28599–606. http://dx.doi.org/10.1021/acsami.6b08709.

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Saito, Makoto, Charles A. Roberts, and Chen Ling. "DFT+U Study of the Adsorption and Oxidation of an Iron Oxide Cluster on CeO2 Support." Journal of Physical Chemistry C 119, no. 30 (2015): 17202–8. http://dx.doi.org/10.1021/acs.jpcc.5b04569.

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Li, F., R. L. Meyer, S. H. Carpenter, et al. "Nitric oxide activation facilitated by cooperative multimetallic electron transfer within an iron-functionalized polyoxovanadate–alkoxide cluster." Chemical Science 9, no. 30 (2018): 6379–89. http://dx.doi.org/10.1039/c8sc00987b.

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Sproules, Stephen. "Comment on “Stabilization of Low‐Valent Iron(I) in a High‐Valent Vanadium(V) Oxide Cluster”." Angewandte Chemie International Edition 58, no. 30 (2019): 10043–47. http://dx.doi.org/10.1002/anie.201811125.

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38

Veith, Michael, Frank Grätz, and Volker Huch. "Fe9O3(OC2H5)21·C2H5OH − A New Structure Type of an Uncharged Iron(III) Oxide−Alkoxide Cluster." European Journal of Inorganic Chemistry 2001, no. 2 (2001): 367–68. http://dx.doi.org/10.1002/1099-0682(200102)2001:2<367::aid-ejic367>3.0.co;2-v.

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39

Carlsson, A., G. Karlsson, J. O. Bovin, et al. "The structure of an iron oxide cluster incorporated into zeolite Y, determined by HRTEM and SAED." European Physical Journal D 9, no. 1 (1999): 623–26. http://dx.doi.org/10.1007/pl00010956.

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40

Grapperhaus, Craig A., Martin G. O’Toole, and Mark S. Mashuta. "Synthesis and structure of the tetradeca-iron(III) oxide–alkoxide cluster [Bu4N]2[Fe14O8(OCH2CH3)20Cl8]." Inorganic Chemistry Communications 9, no. 12 (2006): 1204–6. http://dx.doi.org/10.1016/j.inoche.2006.07.027.

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41

Souza, Edna Santos de, Antonio Rodrigues Fernandes, Anderson Martins De Souza Braz, Fábio Júnior de Oliveira, Luís Reynaldo Ferracciú Alleoni, and Milton César Costa Campos. "Physical, chemical, and mineralogical attributes of a representative group of soils from the eastern Amazon region in Brazil." SOIL 4, no. 3 (2018): 195–212. http://dx.doi.org/10.5194/soil-4-195-2018.

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Abstract. Amazonian soils are heterogeneous. However, few studies have been carried out in the Amazon, mainly because of its considerable size, which complicates the collection of data and the ability to plan for the sustainable use of natural resources. In this study, the physical, chemical, and mineralogical attributes of soils in the state of Pará, Brazil, were characterized by examining the particle size, fertility, silicon extracted by sodium hydroxide, iron, and aluminum, and manganese extracted by sulfuric acid, sodium citrate-bicarbonate-dithionite, and ammonium oxalate + oxalic acid.

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Alam, Umair, Azam Khan, Detlef Bahnemann, and M. Muneer. "Synthesis of iron and copper cluster-grafted zinc oxide nanorod with enhanced visible-light-induced photocatalytic activity." Journal of Colloid and Interface Science 509 (January 2018): 68–72. http://dx.doi.org/10.1016/j.jcis.2017.08.093.

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Jensen, Kirsten, Henrik Andersen, Christoffer Tyrsted та ін. "Formation of γ-Fe2O3 in hydrothermal synthesis: In situ total scattering studies". Acta Crystallographica Section A Foundations and Advances 70, a1 (2014): C1180. http://dx.doi.org/10.1107/s2053273314088196.

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The properties of metal oxide nanoparticles are highly dependent on particle characteristics such as size, crystallinity, and structural defects. To obtain particles with tailormade properties, it is crucial to understand the mechanisms that govern these characteristics during material synthesis. For this purpose, in situ studies of particle synthesis have proven powerful.[1] Here, in situ Total Scattering (TS) combined with in situ PXRD studies of the hydrothermal synthesis of γ-Fe2O3 (maghemite) from ammonium iron citrate will be presented. In situ TS with Pair Distribution Function (PDF) an

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Almijalli, Mohammed, Ali Saad, Khalid Alhussaini, Adham Aleid, and Abdullatif Alwasel. "Towards Drug Delivery Control Using Iron Oxide Nanoparticles in Three-Dimensional Magnetic Resonance Imaging." Nanomaterials 11, no. 8 (2021): 1876. http://dx.doi.org/10.3390/nano11081876.

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The purpose of this paper was to detect and separate the cluster intensity provided by Iron oxide nanoparticles (IO-NPs), in the MRI images, to investigate the drug delivery effectiveness. IO-NPs were attached to the macrophages and inserted into the eye of the inflamed mouse’s calf. The low resolution of MRI and the tiny dimension of the IO-NPs made the situation challenging. IO-NPs serve as a marker, due to their strong intensity in the MRI, enabling us to follow the track of the macrophages. An image processing procedure was developed to estimate the position and the amount of IO-NPs spread

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Starzynski, Rafal Radoslaw, Ana Sofia Gonçalves, Françoise Muzeau, et al. "STAT5 proteins are involved in down-regulation of iron regulatory protein 1 gene expression by nitric oxide." Biochemical Journal 400, no. 2 (2006): 367–75. http://dx.doi.org/10.1042/bj20060623.

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RNA-binding activity of IRP1 (iron regulatory protein 1) is regulated by the insertion/extrusion of a [4Fe-4S] cluster into/from the IRP1 molecule. NO (nitic oxide), whose ability to activate IRP1 by removing its [4Fe-4S] cluster is well known, has also been shown to down-regulate expression of the IRP1 gene. In the present study, we examine whether this regulation occurs at the transcriptional level. Analysis of the mouse IRP1 promoter sequence revealed two conserved putative binding sites for transcription factor(s) regulated by NO and/or changes in intracellular iron level: Sp1 (promoter-se

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Porrini, Constance, Cyprien Guérin, Seav-Ly Tran, Rozenn Dervyn, Pierre Nicolas, and Nalini Ramarao. "Implication of a Key Region of Six Bacillus cereus Genes Involved in Siroheme Synthesis, Nitrite Reductase Production and Iron Cluster Repair in the Bacterial Response to Nitric Oxide Stress." International Journal of Molecular Sciences 22, no. 10 (2021): 5079. http://dx.doi.org/10.3390/ijms22105079.

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Bacterial response to nitric oxide (NO) is of major importance for bacterial survival. NO stress is a main actor of the eukaryotic immune response and several pathogenic bacteria have developed means for detoxification and repair of the damages caused by NO. However, bacterial mechanisms of NO resistance by Gram-positive bacteria are poorly described. In the opportunistic foodborne pathogen Bacillus cereus, genome sequence analyses did not identify homologs to known NO reductases and transcriptional regulators, such as NsrR, which orchestrate the response to NO of other pathogenic or non-patho

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Wan, Tao, Shanren Li, Daisy Guiza Beltran та ін. "Structural basis of non-canonical transcriptional regulation by the σA-bound iron-sulfur protein WhiB1 in M. tuberculosis". Nucleic Acids Research 48, № 2 (2019): 501–16. http://dx.doi.org/10.1093/nar/gkz1133.

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Abstract WhiB1 is a monomeric iron–sulfur cluster-containing transcription factor in the WhiB-like family that is widely distributed in actinobacteria including the notoriously persistent pathogen Mycobacterium tuberculosis (M. tuberculosis). WhiB1 plays multiple roles in regulating cell growth and responding to nitric oxide stress in M. tuberculosis, but its underlying mechanism is unclear. Here we report a 1.85 Å-resolution crystal structure of the [4Fe–4S] cluster-bound (holo-) WhiB1 in complex with the C-terminal domain of the σ70-family primary sigma factor σA of M. tuberculosis containin

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Bhana, Saheel, Gan Lin, Lijia Wang, et al. "Near-Infrared-Absorbing Gold Nanopopcorns with Iron Oxide Cluster Core for Magnetically Amplified Photothermal and Photodynamic Cancer Therapy." ACS Applied Materials & Interfaces 7, no. 21 (2015): 11637–47. http://dx.doi.org/10.1021/acsami.5b02741.

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Zhang, Kou-Lin, Yu-Jun Shi, Xiao-Zeng You, and Kai-Bei Yu. "Preparation, crystal structure and characterization of a novel iron(III) oxide cluster containing two different discrete [Fe3O] units." Journal of Molecular Structure 743, no. 1-3 (2005): 73–77. http://dx.doi.org/10.1016/j.molstruc.2005.02.030.

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Shin, D. N., Y. Matsuda, and E. R. Bernstein. "On the iron oxide neutral cluster distribution in the gas phase. I. Detection through 193 nm multiphoton ionization." Journal of Chemical Physics 120, no. 9 (2004): 4150–56. http://dx.doi.org/10.1063/1.1643732.

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