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Artículos de revistas sobre el tema "Magnetic and spectroscopic investigations"

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Publicado: 6 de septiembre de 2023

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1

Brémard, C., J. J. Girerd, P. Kowalewski, J. C. Merlin y S. Moreau. "Spectroscopic Investigations of Malaria Pigment". Applied Spectroscopy 47, n.º 11 (noviembre de 1993): 1837–42. http://dx.doi.org/10.1366/0003702934065975.

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Malaria pigment is generated during the growth of the intraerythrocytic parasite plasmodium. This compound is postulated as a product of haemoglobin degradation and consists of an unknown iron porphyrin compound and an apoprotein. We report here a new spectroscopic investigation on the porphyrin component of intact malaria pigment obtained from in vitro cultures of Plasmodium falciparum without any previous chemical or biochemical treatment of the sample. We demonstrate the use of resonance Raman microspectrometry, electron paramagnetic resonance spectrometry, and magnetic susceptibility measurements that show the iron porphyrin moiety of the malaria pigment to be a high-spin monomeric iron(III) protoporphyrin hydroxide.
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2

Magnani, Nicola. "Spectroscopic and magnetic investigations of actinide‐based nanomagnets". International Journal of Quantum Chemistry 114, n.º 12 (10 de marzo de 2014): 755–59. http://dx.doi.org/10.1002/qua.24656.

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3

Aitasalo, T., J. Hölsä, M. Lastusaari, J. Legendziewicz, L. Lehto, J. Lindén y M. Maryško. "Structural, magnetic and spectroscopic investigations of europium oxychloride, EuOCl". Journal of Alloys and Compounds 380, n.º 1-2 (octubre de 2004): 296–302. http://dx.doi.org/10.1016/j.jallcom.2004.03.057.

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4

Conway, Michael A. y George K. Radda. "Nuclear magnetic resonance spectroscopic investigations of the human myocardium". Trends in Cardiovascular Medicine 1, n.º 7 (octubre de 1991): 300–304. http://dx.doi.org/10.1016/1050-1738(91)90047-i.

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5

Magnani, Nicola. "ChemInform Abstract: Spectroscopic and Magnetic Investigations of Actinide-based Nanomagnets". ChemInform 45, n.º 50 (27 de noviembre de 2014): no. http://dx.doi.org/10.1002/chin.201450216.

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6

Gan’shina, Elena, Leonard Golik, Zoya Kun’kova, Georgy Zykov, Alexander Rukovishnikov, Marina Temiryazeva, Vladimir Lesnikov y Yuri Markin. "Diluted Magnetic Semiconductors InFeSb Prepared by Laser Ablation: Spectroscopic and Microscopic Investigations". EPJ Web of Conferences 185 (2018): 06015. http://dx.doi.org/10.1051/epjconf/201818506015.

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We report optical and magneto-optical results as well as atomic force microscopy (AFM) and magnetic force microscopy (MFM) results for InFeSb samples prepared by laser ablation. AFM and MFM studies have revealed the presence of magnetic particles on the samples surface, whose sizes depend on the Fe content and substrate temperature. It has found that both optical and magneto-optical spectra are superposition of spectra from the doped InFeSb layers and particles on their surface.
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7

Zink, J. y K. Nagorny. "Mössbauer spectroscopic investigations of the magnetic properties of potassium thioferrate-III". Journal of Physics and Chemistry of Solids 49, n.º 12 (enero de 1988): 1429–34. http://dx.doi.org/10.1016/0022-3697(88)90116-3.

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8

Pradhan, Suman Kalyan, Biswajit Dalal, Ankita Sarkar y Subodh Kumar De. "Spectroscopic and magnetic investigations of a spin-frustrated Mn-doped CoAl2O4 spinel". Physical Chemistry Chemical Physics 21, n.º 2 (2019): 842–50. http://dx.doi.org/10.1039/c8cp07140c.

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9

Kroll, T., A. A. Aligia, M. Knupfer, J. Geck, C. Hess, T. Schwieger, G. Krabbes et al. "Spectroscopic investigations on layered sodium cobaltates". Physica C: Superconductivity and its Applications 460-462 (septiembre de 2007): 487–88. http://dx.doi.org/10.1016/j.physc.2007.03.063.

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10

Baran, M., H. Szymczak, S. A. Klimin, M. N. Popova, R. Z. Levitin y B. V. Mill’. "Anisotropy of the magnetic properties of the cuprates Dy2BaCuO5 and Ho2BaCuO5: Magnetic and spectroscopic investigations". Journal of Experimental and Theoretical Physics 84, n.º 1 (enero de 1997): 175–82. http://dx.doi.org/10.1134/1.558265.

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11

yun-hong, He y Li Jiu-sheng. "Terahertz spectroscopic investigation of magnetic materials". Journal of Physics: Conference Series 276 (1 de febrero de 2011): 012206. http://dx.doi.org/10.1088/1742-6596/276/1/012206.

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12

Łyszczek, R., H. Głuchowska, B. Cristóvão y B. Tarasiuk. "New lanthanide biphenyl-4,4′-diacetates − hydrothermal synthesis, spectroscopic, magnetic and thermal investigations". Thermochimica Acta 645 (diciembre de 2016): 16–23. http://dx.doi.org/10.1016/j.tca.2016.11.001.

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13

Harizanova, Ruzha, Ivalina Avramova, Zara Cherkezova-Zheleva, Daniela Paneva, Rositsa Kukeva, Radostina Stoyanova, Ivailo Gugov et al. "Spectroscopic investigations and magnetic measurements on iron-containing barium titanate glass-ceramics". Journal of Non-Crystalline Solids 546 (octubre de 2020): 120273. http://dx.doi.org/10.1016/j.jnoncrysol.2020.120273.

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14

Gunsser, W., Th Lemke, B. R. Röhl y M. A. Denecke. "X-Ray Absorption Spectroscopic and Magnetic Investigations on the Garnet Mn3Al2-xCrxGe3O12". Journal of Solid State Chemistry 118, n.º 2 (septiembre de 1995): 261–66. http://dx.doi.org/10.1006/jssc.1995.1342.

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15

Tomm, J. W., T. Kelz, W. Hoerstel, K. H. Herrmann, T. K. Tran, R. Bicknell-Tassius, B. K. Wagner, R. G. Benz y C. J. Summers. "Magnetoluminescence spectroscopic investigations in Hg0.7Cd0.3Te/Hg0.15Cd0.85Te superlattices". Semiconductor Science and Technology 10, n.º 4 (1 de abril de 1995): 469–75. http://dx.doi.org/10.1088/0268-1242/10/4/015.

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16

Rao, M. C. y O. M. Hussain. "Spectroscopic investigations on tetravalent doped LiCoO2thin film cathodes". European Physical Journal Applied Physics 48, n.º 2 (17 de septiembre de 2009): 20503. http://dx.doi.org/10.1051/epjap/2009142.

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17

Bayeh, Yosef, Nithin Suryadevara, Sören Schlittenhardt, Róbert Gyepes, Assefa Sergawie, Peter Hrobárik, Wolfgang Linert, Mario Ruben y Madhu Thomas. "Investigations on the Spin States of Two Mononuclear Iron(II) Complexes Based on N-Donor Tridentate Schiff Base Ligands Derived from Pyridine-2,6-Dicarboxaldehyde". Inorganics 10, n.º 7 (8 de julio de 2022): 98. http://dx.doi.org/10.3390/inorganics10070098.

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Iron(II)-Schiff base complexes are a well-studied class of spin-crossover (SCO) active species due to their ability to interconvert between a paramagnetic high spin-state (HS, S = 2, 5T2) and a diamagnetic low spin-state (LS, S = 0, 1A1) by external stimuli under an appropriate ligand field. We have synthesized two mononuclear FeII complexes, viz., [Fe(L1)2](ClO4)2.CH3OH (1) and [Fe(L2)2](ClO4)2.2CH3CN (2), from two N6–coordinating tridentate Schiff bases derived from 2,6-bis[(benzylimino)methyl]pyridine. The complexes have been characterized by elemental analysis, electrospray ionization–mass spectrometry (ESI-MS), Fourier-transform infrared spectroscopy (FTIR), solution state nuclear magnetic resonance spectroscopy, 1H and 13C NMR (both theoretically and experimentally), single-crystal diffraction and magnetic susceptibility studies. The structural, spectroscopic and magnetic investigations revealed that 1 and 2 are with Fe–N6 distorted octahedral coordination geometry and remain locked in LS state throughout the measured temperature range from 5–350 K.
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18

Tronc, E., F. Laville, M. Gasperin, A. M. Lejus y D. Vivien. "Structural and spectroscopic investigations of LaFeAl11O19 compounds". Journal of Solid State Chemistry 81, n.º 2 (agosto de 1989): 192–202. http://dx.doi.org/10.1016/0022-4596(89)90006-6.

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19

Elshafie, Hazem S., Sadeek A. Sadeek, Ippolito Camele y Amira A. Mohamed. "Biological and Spectroscopic Investigations of New Tenoxicam and 1.10-Phenthroline Metal Complexes". Molecules 25, n.º 5 (25 de febrero de 2020): 1027. http://dx.doi.org/10.3390/molecules25051027.

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In the present work, tenoxicam (H2Ten) reacted with Mn(II), Co(II), Ni(II), Cu(II) and Zn (II) ions in the presence of 1.10-phenthroline (Phen), forming new mixed ligand metal complexes. The properties of the formed complexes were depicted by elemental analyses, infrared, electronic spectra, proton nuclear magnetic resonance (1H NMR), mass spectrometry, thermogravimetric (TGA) and differential thermogravimetric (DTG) analysis, molar conductance and magnetic moment. IR spectra demonstrated that H2Ten acted as a neutral bidentate ligand, coordinated to the metal ions via the pyridine-N and carbonyl group of the amide moiety, and Phen through the nitrogen atoms. Kinetic thermodynamics parameters activation energy (E*), enthalpy of activation (ΔH*), entropy of activation (ΔS*), Gibbs, free energy (ΔG*) associated to the complexes have been evaluated. Antibacterial screening of the compounds was carried out in vitro against Clavibacter michiganensis, Xanthomonas campestris and Bacillus megaterium. Antifungal activity was performed in vitro against Monilinia fructicola, Penicillium digitatum and Colletotrichum acutatum. The possible phytotoxic effect of the studied compounds was also investigated on Solanum lycopersicum (tomatoes) and Lepidium sativum (garden cress) seeds. The anticancer activity was screened against cell cultures of HCT-116 (human colorectal carcinoma), HepG2 (human hepatocellular carcinoma) and MCF-7 (human breast adenocarcinoma).
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20

Wojciechowska, Agnieszka, Jan Janczak, Zbigniew Staszak, Marek Duczmal, Wiktor Zierkiewicz, Jadwiga Tokar y Andrew Ozarowski. "Structural, spectroscopic, magnetic behavior and DFT investigations ofl-tyrosinato nickel(ii) coordination polymer". New Journal of Chemistry 39, n.º 9 (2015): 6813–22. http://dx.doi.org/10.1039/c5nj00972c.

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21

Demers, D. R., P. M. Schoch, R. J. Radke, J. K. Anderson, D. Craig y D. J. Den Hartog. "Spectroscopic ion beam imaging for investigations into magnetic field mapping of a plasma". Review of Scientific Instruments 74, n.º 3 (marzo de 2003): 2103–6. http://dx.doi.org/10.1063/1.1537439.

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22

Ivanov, S. A., P. Nordblad, R. Tellgren, T. Ericsson y H. Rundlof. "Structural, magnetic and Mössbauer spectroscopic investigations of the magnetoelectric relaxor Pb(Fe0.6W0.2Nb0.2)O3". Solid State Sciences 9, n.º 5 (mayo de 2007): 440–50. http://dx.doi.org/10.1016/j.solidstatesciences.2007.03.018.

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23

Chrobak, Łukasz, Mirosław Maliński y Jacek Zakrzewski. "Photoacoustic spectroscopic investigations of optical and thermal properties of diluted magnetic CdBeMnTe crystals". Materials Science in Semiconductor Processing 38 (octubre de 2015): 87–92. http://dx.doi.org/10.1016/j.mssp.2015.04.003.

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24

Fleischhauer, P., S. Gehring y W. Haase. "Magnetic and EPR Spectroscopic Investigations on a Ferromagnetic Coupled Trinuclear Cu(II) Complex". Berichte der Bunsengesellschaft für physikalische Chemie 96, n.º 11 (noviembre de 1992): 1701–4. http://dx.doi.org/10.1002/bbpc.19920961133.

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25

Maqsood, Asghari, Kishwar Khan, M. Anis-ur-Rehman y M. A. Malik. "Spectroscopic and magnetic investigation of NiCo nanoferrites". Journal of Alloys and Compounds 509, n.º 27 (julio de 2011): 7493–97. http://dx.doi.org/10.1016/j.jallcom.2011.04.092.

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26

Radzieowski, Mathis, Frank Stegemann, Steffen Klenner, Yuemei Zhang, Boniface P. T. Fokwa y Oliver Janka. "On the divalent character of the Eu atoms in the ternary Zintl phases Eu5In2Pn6 and Eu3MAs3 (Pn = As–Bi; M = Al, Ga)". Materials Chemistry Frontiers 4, n.º 4 (2020): 1231–48. http://dx.doi.org/10.1039/c9qm00703b.

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Structural and property investigations of the five Zintl phases Eu5In2Pn6 and Eu3MAs3 (Pn = As–Bi; M = Al, Ga) including magnetic and 121Sb and 151Eu Mössbauer spectroscopic measurements.
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27

Shen, Jingling, Guangqin Wang, Dejun Jiang, Laishun Liang y Xiaoyu Xu. "Terahertz spectroscopic investigations of caffeine and 3-acetylmorphine". Optik 121, n.º 18 (octubre de 2010): 1712–16. http://dx.doi.org/10.1016/j.ijleo.2008.08.011.

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28

Mancini, Tiziana, Rosanna Mosetti, Augusto Marcelli, Massimo Petrarca, Stefano Lupi y Annalisa D’Arco. "Terahertz Spectroscopic Analysis in Protein Dynamics: Current Status". Radiation 2, n.º 1 (7 de febrero de 2022): 100–123. http://dx.doi.org/10.3390/radiation2010008.

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Proteins play a key role in living organisms. The study of proteins and their dynamics provides information about their functionality, catalysis and potential alterations towards pathological diseases. Several techniques are used for studying protein dynamics, e.g., magnetic resonance, fluorescence imaging techniques, mid-infrared spectroscopy and biochemical assays. Spectroscopic analysis, based on the use of terahertz (THz) radiation with frequencies between 0.1 and 15 THz (3–500 cm−1), was underestimated by the biochemical community. In recent years, however, the potential of THz spectroscopy in the analysis of both simple structures, such as polypeptide molecules, and complex structures, such as protein complexes, has been demonstrated. The THz absorption spectrum provides some information on proteins: for small molecules the THz spectrum is dominated by individual modes related to the presence of hydrogen bonds. For peptides, the spectral information concerns their secondary structure, while for complex proteins such as globular proteins and viral glycoproteins, spectra also provide information on collective modes. In this short review, we discuss the results obtained by THz spectroscopy in the protein dynamics investigations. In particular, we will illustrate advantages and applications of THz spectroscopy, pointing out the complementary information it may provide.
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29

Jacobs, Helen, Frank Ramdayal, William F. Reynolds, Janusz Poplawski y Stewart McLean. "Isolation of 5-methoxy-2,2-dimethyl-1-2H-benzopyran-6-propanoic acid methyl ester and characterization by two-dimensional nuclear magnetic resonance spectroscopy". Canadian Journal of Chemistry 64, n.º 3 (1 de marzo de 1986): 580–83. http://dx.doi.org/10.1139/v86-094.

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The structure of the title compound (1), isolated from Hortiaregia, was established by nuclear magnetic resonance spectroscopy. The investigation demonstrates the value of indirect shift correlation experiments. The compound was further characterized by chemical and spectroscopic methods.
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30

Surowiec, Zbigniew, Arkadiusz Miaskowski y Mieczysław Budzyński. "Investigation of magnetite Fe3O4 nanoparticles for magnetic hyperthermia". Nukleonika 62, n.º 2 (27 de junio de 2017): 183–86. http://dx.doi.org/10.1515/nuka-2017-0028.

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Abstract The paper presents the investigation of magnetic nanoparticles (MNPs) dedicated to hyperthermia application. The crystal structure and size distributions have been determined by means of transmission electron microscope (TEM) and X-ray diffraction (XRD). Magnetic properties of the nanoparticles were tested by Mössbauer spectroscopy together with calorimetric experiments. The Mössbauer spectroscopic study of MNPs revealed the existence of a superparamagnetic phase. The relative contribution of the relaxing component to the total spectrum at room temperature was about 10%. The heating effect of these MNPs under alternating magnetic field was examined. The temperature increase has reached 5°C in 10 min. The preliminary temperature rise suggests that the investigated materials are applicable for hyperthermia.
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31

Pichler, K., R. H. Friend, W. J. Romanow, W. J. Romanow, H. Mertwoy y J. E. Fischer. "Spectroscopic investigations of fullerene in the solid state". Synthetic Metals 51, n.º 1-3 (septiembre de 1992): 257–65. http://dx.doi.org/10.1016/0379-6779(92)90279-r.

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32

Ravikumar, R. V. S. S. N., A. V. Chandrasekhar, B. J. Reddy, Y. P. Reddy y Jun Yamauchi. "Spectroscopic Investigations on Co(II) Doped ZAPH and CAPH Crystals". Ferroelectrics 274, n.º 1 (enero de 2002): 127–34. http://dx.doi.org/10.1080/00150190213966.

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33

Bogdanov, V. N., I. M. Brovchenko, L. V. Maksimov, A. R. Silin y O. V. Yanush. "Spectroscopic, Optical, and Acoustic Investigations of Radiation Modified Silica Glasses". physica status solidi (a) 119, n.º 2 (16 de junio de 1990): 621–29. http://dx.doi.org/10.1002/pssa.2211190226.

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34

Spinu, Cristian Andrei, Céline Pichon, Gabriela Ionita, Teodora Mocanu, Sergiu Calancea, Mihai Raduca, Jean-Pascal Sutter, Mihaela Hillebrand y Marius Andruh. "Synthesis, crystal structure, magnetic, spectroscopic, and theoretical investigations of two new nitronyl-nitroxide complexes". Journal of Coordination Chemistry 74, n.º 1-3 (22 de enero de 2021): 279–93. http://dx.doi.org/10.1080/00958972.2021.1871900.

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35

Van Stappen, Casey, Dimitrios Maganas, Serena DeBeer, Eckhard Bill y Frank Neese. "Investigations of the Magnetic and Spectroscopic Properties of V(III) and V(IV) Complexes". Inorganic Chemistry 57, n.º 11 (23 de mayo de 2018): 6421–38. http://dx.doi.org/10.1021/acs.inorgchem.8b00486.

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36

Berry, Frank J., José F. Marco, Megan I. Sarson y Mark R. Smith. "Mössbauer spectroscopic investigations of spin glass and other magnetic properties of mixed metal oxides". Hyperfine Interactions 66, n.º 1-4 (noviembre de 1991): 25–37. http://dx.doi.org/10.1007/bf02395853.

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37

Prasad, S. V. G. V. A., G. Sahaya Baskaran y N. Veeraiah. "Spectroscopic, magnetic and dielectric investigations of BaO-Ga2O3-P2O5 glasses doped by Cu ions". physica status solidi (a) 202, n.º 14 (noviembre de 2005): 2812–28. http://dx.doi.org/10.1002/pssa.200521131.

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38

Sunseri, Carmelo, Salvatore Piazza y Francesco Di Quarto. "Photocurrent Spectroscopic Investigations of Passive Films on Chromium". Journal of The Electrochemical Society 137, n.º 8 (1 de agosto de 1990): 2411–17. http://dx.doi.org/10.1149/1.2086952.

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39

Ślebarski, Andrzej, Józef Deniszczyk y Dariusz Kaczorowski. "Mixed Valence of Ce and Its Consequences on the Magnetic State of Ce9Ru4Ga5: Electronic Structure Studies". Materials 13, n.º 10 (21 de mayo de 2020): 2377. http://dx.doi.org/10.3390/ma13102377.

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We report on X-ray photoelectron spectroscopy (XPS) and ab initio electronic structure investigations of a novel intermetallic material Ce 9 Ru 4 Ga 5 . The compound crystallizes with a tetragonal unit cell (space group I4 m m ) that contains three inequivalent Ce atoms sites. The Ce 3 d core level XPS spectra indicated an intermediate valence (IV) of selected Ce ions, in line with the previously reported thermodynamic and spectroscopic data. The ab initio calculations revealed that Ce1 ions located at 2 a Wyckoff positions possess stable trivalent configuration, whereas Ce2 ions that occupy 8 d site are intermediate valent. Moreover, for Ce3 ions, located at different 8 d position, a fractional valence was found. The results are discussed in terms of on-site and intersite hybridization effects.
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40

Chaminade, J. P., J. M. Dance, J. Moutou y M. Pouchard. "Crystal structure, spectroscopic and magnetic investigation of CuWO3F2". Journal of Fluorine Chemistry 35, n.º 1 (febrero de 1987): 178. http://dx.doi.org/10.1016/0022-1139(87)95143-8.

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41

Wu, Zhangting y Zhenhua Ni. "Spectroscopic investigation of defects in two-dimensional materials". Nanophotonics 6, n.º 6 (11 de marzo de 2017): 1219–37. http://dx.doi.org/10.1515/nanoph-2016-0151.

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AbstractTwo-dimensional (2D) materials have been extensively studied in recent years due to their unique properties and great potential for applications. Different types of structural defects could present in 2D materials and have strong influence on their properties. Optical spectroscopic techniques, e.g. Raman and photoluminescence (PL) spectroscopy, have been widely used for defect characterization in 2D materials. In this review, we briefly introduce different types of defects and discuss their effects on the mechanical, electrical, optical, thermal, and magnetic properties of 2D materials. Then, we review the recent progress on Raman and PL spectroscopic investigation of defects in 2D materials, i.e. identifying of the nature of defects and also quantifying the numbers of defects. Finally, we highlight perspectives on defect characterization and engineering in 2D materials.
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42

Aliyu, Umar Sa'ad, Halimah Mohamed Kamari, Ibrahim Gana Geidam, Ibrahim Olanrewaju Alade, Azlan Muhammad Noorazlan, Abdulkarim Muhammad Hamza y Ahmad Fahad Ahmad. "Spectroscopic investigations of Er2O3 doped silica borotellurite glasses". Optical Materials 114 (abril de 2021): 110987. http://dx.doi.org/10.1016/j.optmat.2021.110987.

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43

Muniyappan, Srinivasan, Yuxi Lin, Young-Ho Lee y Jin Hae Kim. "17O NMR Spectroscopy: A Novel Probe for Characterizing Protein Structure and Folding". Biology 10, n.º 6 (21 de mayo de 2021): 453. http://dx.doi.org/10.3390/biology10060453.

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Oxygen is a key atom that maintains biomolecular structures, regulates various physiological processes, and mediates various biomolecular interactions. Oxygen-17 (17O), therefore, has been proposed as a useful probe that can provide detailed information about various physicochemical features of proteins. This is attributed to the facts that (1) 17O is an active isotope for nuclear magnetic resonance (NMR) spectroscopic approaches; (2) NMR spectroscopy is one of the most suitable tools for characterizing the structural and dynamical features of biomolecules under native-like conditions; and (3) oxygen atoms are frequently involved in essential hydrogen bonds for the structural and functional integrity of proteins or related biomolecules. Although 17O NMR spectroscopic investigations of biomolecules have been considerably hampered due to low natural abundance and the quadruple characteristics of the 17O nucleus, recent theoretical and technical developments have revolutionized this methodology to be optimally poised as a unique and widely applicable tool for determining protein structure and dynamics. In this review, we recapitulate recent developments in 17O NMR spectroscopy to characterize protein structure and folding. In addition, we discuss the highly promising advantages of this methodology over other techniques and explain why further technical and experimental advancements are highly desired.
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44

Uddin, Zaheer, Driss El Bakkali, B. Gamper, Shamim Khan, Imran Siddiqui, G. H. Guthöhrlein y L. Windholz. "Laser Spectroscopic Investigations of Praseodymium I Transitions: New Energy Levels". Advances in Optical Technologies 2012 (17 de septiembre de 2012): 1–34. http://dx.doi.org/10.1155/2012/639126.

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We report the discovery of about 140 new energy levels of the neutral praseodymium atom, found by means of laser-induced fluorescence spectroscopy. Their energy has been determined with an uncertainty of 0.010 cm−1 using a wave number calibrated Fourier-transform spectrum.
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Reddy, M. Bhushana, S. Sailaja, P. Giridhar, C. Nageswara Raju y B. Sudhakar Reddy. "Spectroscopic Investigations of Sm3+Ions Doped B2O3-Bi2O3-ZnO-Li2O Glasses". Ferroelectrics Letters Section 38, n.º 1-3 (enero de 2011): 40–50. http://dx.doi.org/10.1080/07315171.2011.570179.

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46

Schaack, G., M. Le Maire, M. Schmitt-Lewen, M. Illing, A. Lengel, M. Manger y R. Straub. "New dielectric and spectroscopic investigations on betaine calcium chloride dihydrate (BCCD)". Ferroelectrics 183, n.º 1 (julio de 1996): 205–14. http://dx.doi.org/10.1080/00150199608224107.

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Theakstone, Ashton, Paul Brennan, Michael Jenkinson, Samantha Mills, Khaja Syed, Christopher Rinaldi, Yun Xu et al. "Rapid Spectroscopic Liquid Biopsy for the Universal Detection of Brain Tumours". Cancers 13, n.º 15 (30 de julio de 2021): 3851. http://dx.doi.org/10.3390/cancers13153851.

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Background: To support the early detection and diagnosis of brain tumours we have developed a rapid, cost-effective and easy to use spectroscopic liquid biopsy based on the absorbance of infrared radiation. We have previously reported highly sensitive results of our approach which can discriminate patients with a recent brain tumour diagnosis and asymptomatic controls. Other liquid biopsy approaches (e.g., based on tumour genetic material) report a lower classification accuracy for early-stage tumours. In this manuscript we present an investigation into the link between brain tumour volume and liquid biopsy test performance. Methods: In a cohort of 177 patients (90 patients with high-grade glioma (glioblastoma (GBM) or anaplastic astrocytoma), or low-grade glioma (astrocytoma, oligoastrocytoma and oligodendroglioma)) tumour volumes were calculated from magnetic resonance imaging (MRI) investigations and patients were split into two groups depending on MRI parameters (T1 with contrast enhancement or T2/FLAIR (fluid-attenuated inversion recovery)). Using attenuated total reflection (ATR)-Fourier transform infrared (FTIR) spectroscopy coupled with supervised learning methods and machine learning algorithms, 90 tumour patients were stratified against 87 control patients who displayed no symptomatic indications of cancer, and were classified as either glioma or non-glioma. Results: Sensitivities, specificities and balanced accuracies were all greater than 88%, the area under the curve (AUC) was 0.98, and cancer patients with tumour volumes as small as 0.2 cm3 were correctly identified. Conclusions: Our spectroscopic liquid biopsy approach can identify gliomas that are both small and low-grade showing great promise for deployment of this technique for early detection and diagnosis.
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Thompson, Arthur R., Ajit C. Kunwar, Herbert S. Gutowsky y Eric Oldfield. "Oxygen-17 and aluminium-27 nuclear magnetic resonance spectroscopic investigations of aluminium(III) hydrolysis products". Journal of the Chemical Society, Dalton Transactions, n.º 10 (1987): 2317. http://dx.doi.org/10.1039/dt9870002317.

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Panda, R. N., G. Balaji, P. K. Pandey y N. S. Gajbhiye. "Magnetic, Mössbauer and X-ray photoelectron spectroscopic investigations on nanocrystalline Fe3Mo3N, FeMoN2 and Ni3Mo3N nitrides". Hyperfine Interactions 184, n.º 1-3 (junio de 2008): 245–50. http://dx.doi.org/10.1007/s10751-008-9797-3.

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Korver, O., J. U. Veenland y Th J. de Boer. "Spectroscopic investigations of thiobenzophenones: III. Infra-red absorption and nuclear magnetic resonance spectra of thiobenzophenones". Recueil des Travaux Chimiques des Pays-Bas 84, n.º 3 (2 de septiembre de 2010): 310–13. http://dx.doi.org/10.1002/recl.19650840306.

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