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CERN Document Server 2,049 записей найдено  1 - 10следующийконец  перейти к записи: Поиск длился 0.50 секунд. 
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Revisiting the hydrolysis of ampicillin catalyzed byTemoneira-1β-lactamase, and the effect of Ni(II), Cd(II)and Hg(II) / Nafaee, Zeyad H (Szeged U. ; Unlisted, IQ) ; Egyed, Viktoria (Szeged U.) ; Jancso, Attila (Szeged U.) ; Toth, Annamaria (Szeged U.) ; Gerami, Adeleh Mokhles (IPM, Tehran ; CERN) ; Dang, Thanh Thien (Duisburg-Essen U.) ; Heiniger-Schell, Juliana (CERN ; Duisburg-Essen U.) ; Hemmingsen, Lars (Bohr Inst.) ; Hunyadi-Gulyas, Eva (Budapest, RMKI) ; Peintler, Gabor (Szeged U.) et al.
β-Lactamases grant resistance to bacteria against β-lactam antibiotics. The active center of TEM-1 β-lactamase accommodates a Ser-Xaa-Xaa-Lys motif. [...]
2023 - 20 p. - Published in : Protein Sci. 32 (2023) e4809 Fulltext: PDF;
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S77C-ΔC7-CueR: a $^{199m}$Hg PAC study of the protein metal site structure / Balogh, R K (Szeged U.) ; Jancso, A (Szeged U.) ; Gyurcsik, B (Szeged U.) ; Schell, J (Duisburg-Essen U. ; CERN) ; Correia, J G (Lisbon U.) ; Thulstrup, P W (Bohr Inst.) ; Hemmingsen, L (Bohr Inst.)
The CueR protein regulates the cytosolic concentration of Cu(I) in bacteria such as E. coli. [...]
2024 - 7 p. - Published in : Hyperfine Interact. 245 (2024) 43 Fulltext: PDF;
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C‐terminal Cysteines of CueR Act as Auxiliary Metal Site Ligands upon Hg$^{II}$ Binding—A Mechanism To Prevent Transcriptional Activation by Divalent Metal Ions? / Balogh, Ria K (Szeged U.) ; Gyurcsik, Béla (Szeged U.) ; Hunyadi‐Gulyás, Éva (Szeged U., Cybernetics Lab) ; Schell, Juliana (CERN ; Duisburg-Essen U.) ; Thulstrup, Peter W (Copenhagen U.) ; Hemmingsen, Lars (Copenhagen U.) ; Jancsó, Attila (Szeged U.)
Intracellular CuI is controlled by the transcriptional regulator CueR, which effectively discriminates between monovalent and divalent metal ions. It is intriguing that HgII does not activate transcription, as bis-thiolate metal sites exhibit high affinity for HgII. [...]
2019 - 6 p. - Published in : Chemistry – A European Journal 25 (2019) 15030-15035 Fulltext: PDF;
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A hyperfine look at titanium dioxide / Schell, J (CERN ; Duisburg-Essen U.) ; Zyabkin, D ; Lupascu, Doru C (Duisburg-Essen U.) ; Hofsäss, Hans-Christian ; Karabasov, M O (Duisburg-Essen U.) ; Welker, A (CERN) ; Schaaf, P
2019 - 6 p. - Published in : AIP Adv. 9 (2019) 085208
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TDPAC and β-NMR applications in chemistry and biochemistry / Jancso, Attila (Szeged U.) ; Correia, Joao G (CERN ; IST/ITN, Lisbon) ; Gottberg, Alexander (TRIUMF) ; Schell, Juliana (CERN ; Duisburg-Essen U.) ; Stachura, Monika (TRIUMF) ; Szunyogh, D (Szeged U. ; Copenhagen U.) ; Pallada, Stavroula (CERN ; Bohr Inst. ; Democritus U., Thrace) ; Lupascu, Doru C (Duisburg-Essen U.) ; Kowalska, Magdalena (CERN) ; Hemmingsen, Lars (Bohr Inst.)
Time differential perturbed angular correlation (TDPAC) of γ-rays spectroscopy has been applied in chemistry and biochemistry for decades. Herein we aim to present a comprehensive review of chemical and biochemical applications of TDPAC spectroscopy conducted at ISOLDE over the past 15 years, including elucidation of metal site structure and dynamics in proteins and model systems. [...]
2017 - 25 p. - Published in : J. Phys. G 44 (2017) 064003
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Confirming the Unusual Temperature Dependence of the Electric-Field Gradient in Zn / Haas, Heinz (Aveiro U. ; CERN) ; Zyabkin, Dmitry (Ilmenau Tech. U.) ; Schell, Juliana (CERN ; Duisburg-Essen U.) ; Dang, Thien T (Duisburg-Essen U.) ; Yap, Ian C J (Gottingen U., II. Phys. Inst.) ; Michelon, Ilaria (Padua U.) ; Gaertner, Daniel (Munster U.) ; Gerami, Adeleh Mokhles (IPM, Tehran) ; Noll, Cornelia (Bonn U.) ; Beck, Reinhard (Bonn U.)
The electric-field gradient (EFG) at nuclei in solids is a sensitive probe of the charge distribution. Experimental data, which previously only existed in insulators, have been available for metals with the development of nuclear measuring techniques since about 1970. [...]
2022 - 8 p. - Published in : Crystals 12 (2022) 1064 Fulltext: PDF;
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111Ag-Perturbed Angular Correlation of γ-rays (PAC) spectroscopy during the long shutdown 2019-2020: Function of proteins in Cu+ homeostasis and transport / Hemmingsen, Lars (University of Copenhagen) ; Jancsó, Attila (University of Szeged) ; Köster, Ulli (Institut Laue-Langevin) ; Schell, Juliana (European Organization for Nuclear Research (CERN) and University Duisburg-Essen) ; Lupascu, Doru Constantin (University Duisburg-Essen) ; Huffman, David (Western Michigan University) ; Martins Correia, Joao Guilherme (European Organization for Nuclear Research (CERN) and Centro de Ciências e Tecnologias Nucleares (C2TN))
CERN-INTC-2017-042 ; INTC-P-512. - 2017.
Fulltext
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 Speciation of Aquatic Heavy Metals in Humic Substances by$^{111m}$Cd/$^{199m}$Hg-TDPAC / institute - ISOLDE.
Approved: 20 April 1995.-
Status: Finished
Experiment: IS350
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(36)
Strong magnetoelectric coupling at an atomic nonmagnetic electromagnetic probe in bismuth ferrite / Schell, Juliana (CERN ; Duisburg-Essen U.) ; Schmuck, Merlin (Duisburg-Essen U.) ; Efe, İpek (Zurich, ETH) ; Dang, Thien Thanh (Duisburg-Essen U.) ; Gonçalves, João Nuno (Aveiro U.) ; Lewin, Daniil (Duisburg-Essen U.) ; Castillo, Marianela Escobar (Duisburg-Essen U.) ; Shvartsman, Vladimir V (Duisburg-Essen U.) ; Costa, Ângelo Rafael Granadeiro (CERN ; Lisbon, IST) ; Köster, Ulli (Laue-Langevin Inst.) et al.
Isolated nonmagnetic substitutional defect ions experience huge coupled electric magnetic interaction in the single-phase multiferroic BiFeO$_{3}$. In the ferroelectric state above the magnetic Néel temperature $T$$_{N}$, the electric environment generates a single symmetric electric field gradient (EFG) parallel to the electric polarization direction. [...]
2022 - 13 p. - Published in : Phys. Rev. B 105 (2022) 094102
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Temperature dependence of the local electromagnetic field at the Fe site in multiferroic bismuth ferrite / Dang, T T (U. Duisburg-Essen) ; Schell, J (U. Duisburg-Essen ; CERN) ; Boa, A G (Denmark, Tech. U.) ; Lewin, D (U. Duisburg-Essen) ; Marschick, G (TU Vienna) ; Dubey, A (U. Duisburg-Essen) ; Escobar-Castillo, M (Duisburg-Essen U.) ; Noll, C (Bonn U., HISKP) ; Beck, R (Bonn U., HISKP) ; Zyabkin, Dmitry V (Ilmenau Tech. U.) et al.
In this paper, we present a study of the temperature-dependent characteristics of electromagnetic fields at the atomic scale in multiferroic bismuth ferrite (BiFeO$_3$ or BFO). The study was performed using time differential perturbed angular correlation (TDPAC) spectroscopy on implanted 111In (111Cd) probes over a wide temperature range. [...]
2022 - 15 p. - Published in : Phys. Rev. B 106 (2022) 054416 Fulltext: PDF;
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