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1,173 results on '"Gunther, S."'

1. Formation of Fully Stoichiometric, Oxidation-State Pure Neptunium and Plutonium Dioxides from Molecular Precursors

Author

Peterson, Appie, Kelly, Sheridon N, Arino, Trevor, Gunther, S Olivia, Ouellette, Erik T, Wacker, Jennifer N, Woods, Joshua J, Teat, Simon J, Lukens, Wayne W, Arnold, John, Abergel, Rebecca J, and Minasian, Stefan G

Subjects
Inorganic Chemistry, Chemical Sciences, CSD-48-NextGen, Physical Chemistry (incl. Structural), Other Chemical Sciences, Inorganic & Nuclear Chemistry, Inorganic chemistry, Macromolecular and materials chemistry
Abstract

Amidate-based ligands (N-(tert-butyl)isobutyramide, ITA) bind κ2 to form homoleptic, 8-coordinate complexes with tetravalent 237Np (Np(ITA)4, 1-Np) and 242Pu (Pu(ITA)4, 1-Pu). These compounds complete an isostructural series from Th, U-Pu and allow for the direct comparison between many of the early actinides with stable tetravalent oxidation states by nuclear magnetic resonance (NMR) spectroscopy and single crystal X-ray diffraction (SCXRD). The molecular precursors are subjected to controlled thermolysis under mild conditions with the exclusion of exogenous air and moisture, facilitating the removal of the volatile organic ligands and ligand byproducts. The preformed metal-oxygen bond in the precursor, as well as the metal oxidation state, are maintained through the decomposition, forming fully stoichiometric, oxidation-state pure NpO2 and PuO2. Powder X-ray diffraction (PXRD), scanning transmission electron microscopy (STEM), and energy dispersive X-ray spectroscopy (EDS) elemental mapping supported the evaluation of these high-purity materials. This chemistry is applicable to a wide range of metals, including actinides, with accessible tetravalent oxidation states, and provides a consistent route to analytical standards of importance to the field of nuclear nonproliferation, forensics, and fundamental studies.

Published
2024

2. 4f-Orbital mixing increases the magnetic susceptibility of Cp′ 3 Eu

Author

Gunther, S Olivia, Qiao, Yusen, Smith, Patrick W, Ciccone, Sierra R, Ditter, Alexander S, Huh, Daniel N, Moreau, Liane M, Shuh, David K, Sun, Taoxiang, Arnold, Polly L, Booth, Corwin H, de Jong, Wibe A, Evans, William J, Lukens, Wayne W, and Minasian, Stefan G

Subjects
Inorganic Chemistry, Chemical Sciences, Chemical sciences
Abstract

Traditional models of lanthanide electronic structure suggest that bonding is predominantly ionic, and that covalent orbital mixing is not an important factor in determining magnetic properties. Here, 4f orbital mixing and its impact on the magnetic susceptibility of Cp'3Eu (Cp' = C5H4SiMe3) was analyzed experimentally using magnetometry and X-ray absorption spectroscopy (XAS) methods at the C K-, Eu M5,4-, and L3-edges. Pre-edge features in the experimental and TDDFT-calculated C K-edge XAS spectra provided unequivocal evidence of C 2p and Eu 4f orbital mixing in the π-antibonding orbital of a' symmetry. The charge-transfer configurations resulting from 4f orbital mixing were identified spectroscopically by using Eu M5,4-edge and L3-edge XAS. Modeling of variable-temperature magnetic susceptibility data showed excellent agreement with the XAS results and indicated that increased magnetic susceptibility of Cp'3Eu is due to removal of the degeneracy of the 7F1 excited state due to mixing between the ligand and Eu 4f orbitals.

Published
2024

3. The quest for safer nuclear fuels

Author

Gunther, S Olivia and Schacherl, Bianca

Subjects
Chemical Sciences, Chemical sciences
Abstract

As researchers explore innovative ways to make nuclear fuels more accident-tolerant, this report investigates the use of manganese ions as dopants for uranium oxide (UO2) fuels.

Published
2024

4. Isolable fluorinated triphenylmethyl cation salts of [HCB 11 Cl 11 ] − : demonstration of remarkable hydride affinity

Author

Gunther, S Olivia, Lee, Chun-I, Song, Ellen, Bhuvanesh, Nattamai, and Ozerov, Oleg V

Subjects
Chemical Sciences
Abstract

Significantly fluorinated triarylmethyl cations have long attracted attention as potentially accessible highly reactive carbocations, but their isolation in a convenient form has proved elusive. We show that abstraction of chloride with a cationic silylium reagent leads to the facile formation of di-, tetra-, and hexafluorinated trityl cations, which could be isolated as analytically pure salts with the [HCB11Cl11]- counterion and are compatible with (halo)arene solvents. The F6Tr+ cation carrying six meta-F substituents was computationally predicted to possess up to 20% higher hydride affinity than the parent triphenylmethyl cation Tr+. We report that indeed F6Tr+ displays reactivity unmatched by Tr+. F6Tr+ at ambient temperature abstracts hydrides from the C-H bonds in tetraethylsilane, mesitylene, methylcyclohexane, and catalyzes Friedel-Crafts alkylation of arenes with ethylene, while Tr+ does none of these.

Published
2022

7. Annual (2023) taxonomic update of RNA-directed RNA polymerase-encoding negative-sense RNA viruses (realm Riboviria: kingdom Orthornavirae: phylum Negarnaviricota)

Author

Kuhn, J, Abe, J, Adkins, S, Alkhovsky, S, Avsic-Zupanc, T, Ayllon, M, Bahl, J, Balkema-Buschmann, A, Ballinger, M, Baranwal, V, Beer, M, Bejerman, N, Bergeron, E, Biedenkopf, N, Blair, C, Blasdell, K, Blouin, A, Bradfute, S, Briese, T, Brown, P, Buchholz, U, Buchmeier, M, Bukreyev, A, Burt, F, Buttner, C, Calisher, C, Cao, M, Casas, I, Chandran, K, Charrel, R, Chaturvedi, K, Chooi, K, Crane, A, Bo, E, de la Torre, J, de Souza, W, de Swart, R, Debat, H, Dheilly, N, Di Paola, N, Di Serio, F, Dietzgen, R, Digiaro, M, Drexler, J, Duprex, W, Durrwald, R, Easton, A, Elbeaino, T, Ergunay, K, Feng, G, Firth, A, Fooks, A, Formenty, P, Freitas-Astua, J, Gago-Zachert, S, Garcia, M, Garcia-Sastre, A, Garrison, A, Gaskin, T, Gong, W, Gonzalez, J, de Bellocq, J, Griffiths, A, Groschup, M, Gunther, I, Gunther, S, Hammond, J, Hasegawa, Y, Hayashi, K, Hepojoki, J, Higgins, C, Hongo, S, Horie, M, Hughes, H, Hume, A, Hyndman, T, Ikeda, K, Jiang, D, Jonson, G, Junglen, S, Klempa, B, Klingstrom, J, Kondo, H, Koonin, E, Krupovic, M, Kubota, K, Kurath, G, Laenen, L, Lambert, A, Li, J, Liu, R, Lukashevich, I, Macdiarmid, R, Maes, P, Marklewitz, M, Marshall, S, Marzano, S, Mccauley, J, Mirazimi, A, Muhlberger, E, Nabeshima, T, Naidu, R, Natsuaki, T, Navarro, B, Navarro, J, Neriya, Y, Netesov, S, Neumann, G, Nowotny, N, Nunes, M, Ochoa-Corona, F, Okada, T, Palacios, G, Pallas, V, Papa, A, Paraskevopoulou, S, Parrish, C, Pauvolid-Correa, A, Paweska, J, Perez, D, Pfaff, F, Plemper, R, Postler, T, Rabbidge, L, Radoshitzky, S, Ramos-Gonzalez, P, Rehanek, M, Resende, R, Reyes, C, Rodrigues, T, Romanowski, V, Rubbenstroth, D, Rubino, L, Runstadler, J, Sabanadzovic, S, Sadiq, S, Salvato, M, Sasaya, T, Schwemmle, M, Sharpe, S, Shi, M, Shimomoto, Y, Sidharthan, V, Sironi, M, Smither, S, Song, J, Spann, K, Spengler, J, Stenglein, M, Takada, A, Takeyama, S, Tatara, A, Tesh, R, Thornburg, N, Tian, X, Tischler, N, Tomitaka, Y, Tomonaga, K, Tordo, N, Tu, C, Turina, M, Tzanetakis, I, Vaira, A, van den Hoogen, B, Vanmechelen, B, Vasilakis, N, Verbeek, M, von Bargen, S, Wada, J, Wahl, V, Walker, P, Waltzek, T, Whitfield, A, Wolf, Y, Xia, H, Xylogianni, E, Yanagisawa, H, Yano, K, Ye, G, Yuan, Z, Zerbini, F, Zhang, G, Zhang, S, Zhang, Y, Zhao, L, Okland, A, Kuhn J. H., Abe J., Adkins S., Alkhovsky S. V., Avsic-Zupanc T., Ayllon M. A., Bahl J., Balkema-Buschmann A., Ballinger M. J., Baranwal V. K., Beer M., Bejerman N., Bergeron E., Biedenkopf N., Blair C. D., Blasdell K. R., Blouin A. G., Bradfute S. B., Briese T., Brown P. A., Buchholz U. J., Buchmeier M. J., Bukreyev A., Burt F., Buttner C., Calisher C. H., Cao M., Casas I., Chandran K., Charrel R. N., Chaturvedi K. K., Chooi K. M., Crane A., Bo E. D., de la Torre J. C., de Souza W. M., de Swart R. L., Debat H., Dheilly N. M., Di Paola N., Di Serio F., Dietzgen R. G., Digiaro M., Drexler J. F., Duprex W. P., Durrwald R., Easton A. J., Elbeaino T., Ergunay K., Feng G., Firth A. E., Fooks A. R., Formenty P. B. H., Freitas-Astua J., Gago-Zachert S., Garcia M. L., Garcia-Sastre A., Garrison A. R., Gaskin T. R., Gong W., Gonzalez J. -P. J., de Bellocq J., Griffiths A., Groschup M. H., Gunther I., Gunther S., Hammond J., Hasegawa Y., Hayashi K., Hepojoki J., Higgins C. M., Hongo S., Horie M., Hughes H. R., Hume A. J., Hyndman T. H., Ikeda K., Jiang D., Jonson G. B., Junglen S., Klempa B., Klingstrom J., Kondo H., Koonin E. V., Krupovic M., Kubota K., Kurath G., Laenen L., Lambert A. J., Li J., Li J. -M., Liu R., Lukashevich I. S., MacDiarmid R. M., Maes P., Marklewitz M., Marshall S. H., Marzano S. -Y. L., McCauley J. W., Mirazimi A., Muhlberger E., Nabeshima T., Naidu R., Natsuaki T., Navarro B., Navarro J. A., Neriya Y., Netesov S. V., Neumann G., Nowotny N., Nunes M. R. T., Ochoa-Corona F. M., Okada T., Palacios G., Pallas V., Papa A., Paraskevopoulou S., Parrish C. R., Pauvolid-Correa A., Paweska J. T., Perez D. R., Pfaff F., Plemper R. K., Postler T. S., Rabbidge L. O., Radoshitzky S. R., Ramos-Gonzalez P. L., Rehanek M., Resende R. O., Reyes C. A., Rodrigues T. C. S., Romanowski V., Rubbenstroth D., Rubino L., Runstadler J. A., Sabanadzovic S., Sadiq S., Salvato M. S., Sasaya T., Schwemmle M., Sharpe S. R., Shi M., Shimomoto Y., Sidharthan V. K., Sironi M., Smither S., Song J. -W., Spann K. M., Spengler J. R., Stenglein M. D., Takada A., Takeyama S., Tatara A., Tesh R. B., Thornburg N. J., Tian X., Tischler N. D., Tomitaka Y., Tomonaga K., Tordo N., Tu C., Turina M., Tzanetakis I. E., Vaira A. M., van den Hoogen B., Vanmechelen B., Vasilakis N., Verbeek M., von Bargen S., Wada J., Wahl V., Walker P. J., Waltzek T. B., Whitfield A. E., Wolf Y. I., Xia H., Xylogianni E., Yanagisawa H., Yano K., Ye G., Yuan Z., Zerbini F. M., Zhang G., Zhang S., Zhang Y. -Z., Zhao L., Okland A. L., Kuhn, J, Abe, J, Adkins, S, Alkhovsky, S, Avsic-Zupanc, T, Ayllon, M, Bahl, J, Balkema-Buschmann, A, Ballinger, M, Baranwal, V, Beer, M, Bejerman, N, Bergeron, E, Biedenkopf, N, Blair, C, Blasdell, K, Blouin, A, Bradfute, S, Briese, T, Brown, P, Buchholz, U, Buchmeier, M, Bukreyev, A, Burt, F, Buttner, C, Calisher, C, Cao, M, Casas, I, Chandran, K, Charrel, R, Chaturvedi, K, Chooi, K, Crane, A, Bo, E, de la Torre, J, de Souza, W, de Swart, R, Debat, H, Dheilly, N, Di Paola, N, Di Serio, F, Dietzgen, R, Digiaro, M, Drexler, J, Duprex, W, Durrwald, R, Easton, A, Elbeaino, T, Ergunay, K, Feng, G, Firth, A, Fooks, A, Formenty, P, Freitas-Astua, J, Gago-Zachert, S, Garcia, M, Garcia-Sastre, A, Garrison, A, Gaskin, T, Gong, W, Gonzalez, J, de Bellocq, J, Griffiths, A, Groschup, M, Gunther, I, Gunther, S, Hammond, J, Hasegawa, Y, Hayashi, K, Hepojoki, J, Higgins, C, Hongo, S, Horie, M, Hughes, H, Hume, A, Hyndman, T, Ikeda, K, Jiang, D, Jonson, G, Junglen, S, Klempa, B, Klingstrom, J, Kondo, H, Koonin, E, Krupovic, M, Kubota, K, Kurath, G, Laenen, L, Lambert, A, Li, J, Liu, R, Lukashevich, I, Macdiarmid, R, Maes, P, Marklewitz, M, Marshall, S, Marzano, S, Mccauley, J, Mirazimi, A, Muhlberger, E, Nabeshima, T, Naidu, R, Natsuaki, T, Navarro, B, Navarro, J, Neriya, Y, Netesov, S, Neumann, G, Nowotny, N, Nunes, M, Ochoa-Corona, F, Okada, T, Palacios, G, Pallas, V, Papa, A, Paraskevopoulou, S, Parrish, C, Pauvolid-Correa, A, Paweska, J, Perez, D, Pfaff, F, Plemper, R, Postler, T, Rabbidge, L, Radoshitzky, S, Ramos-Gonzalez, P, Rehanek, M, Resende, R, Reyes, C, Rodrigues, T, Romanowski, V, Rubbenstroth, D, Rubino, L, Runstadler, J, Sabanadzovic, S, Sadiq, S, Salvato, M, Sasaya, T, Schwemmle, M, Sharpe, S, Shi, M, Shimomoto, Y, Sidharthan, V, Sironi, M, Smither, S, Song, J, Spann, K, Spengler, J, Stenglein, M, Takada, A, Takeyama, S, Tatara, A, Tesh, R, Thornburg, N, Tian, X, Tischler, N, Tomitaka, Y, Tomonaga, K, Tordo, N, Tu, C, Turina, M, Tzanetakis, I, Vaira, A, van den Hoogen, B, Vanmechelen, B, Vasilakis, N, Verbeek, M, von Bargen, S, Wada, J, Wahl, V, Walker, P, Waltzek, T, Whitfield, A, Wolf, Y, Xia, H, Xylogianni, E, Yanagisawa, H, Yano, K, Ye, G, Yuan, Z, Zerbini, F, Zhang, G, Zhang, S, Zhang, Y, Zhao, L, Okland, A, Kuhn J. H., Abe J., Adkins S., Alkhovsky S. V., Avsic-Zupanc T., Ayllon M. A., Bahl J., Balkema-Buschmann A., Ballinger M. J., Baranwal V. K., Beer M., Bejerman N., Bergeron E., Biedenkopf N., Blair C. D., Blasdell K. R., Blouin A. G., Bradfute S. B., Briese T., Brown P. A., Buchholz U. J., Buchmeier M. J., Bukreyev A., Burt F., Buttner C., Calisher C. H., Cao M., Casas I., Chandran K., Charrel R. N., Chaturvedi K. K., Chooi K. M., Crane A., Bo E. D., de la Torre J. C., de Souza W. M., de Swart R. L., Debat H., Dheilly N. M., Di Paola N., Di Serio F., Dietzgen R. G., Digiaro M., Drexler J. F., Duprex W. P., Durrwald R., Easton A. J., Elbeaino T., Ergunay K., Feng G., Firth A. E., Fooks A. R., Formenty P. B. H., Freitas-Astua J., Gago-Zachert S., Garcia M. L., Garcia-Sastre A., Garrison A. R., Gaskin T. R., Gong W., Gonzalez J. -P. J., de Bellocq J., Griffiths A., Groschup M. H., Gunther I., Gunther S., Hammond J., Hasegawa Y., Hayashi K., Hepojoki J., Higgins C. M., Hongo S., Horie M., Hughes H. R., Hume A. J., Hyndman T. H., Ikeda K., Jiang D., Jonson G. B., Junglen S., Klempa B., Klingstrom J., Kondo H., Koonin E. V., Krupovic M., Kubota K., Kurath G., Laenen L., Lambert A. J., Li J., Li J. -M., Liu R., Lukashevich I. S., MacDiarmid R. M., Maes P., Marklewitz M., Marshall S. H., Marzano S. -Y. L., McCauley J. W., Mirazimi A., Muhlberger E., Nabeshima T., Naidu R., Natsuaki T., Navarro B., Navarro J. A., Neriya Y., Netesov S. V., Neumann G., Nowotny N., Nunes M. R. T., Ochoa-Corona F. M., Okada T., Palacios G., Pallas V., Papa A., Paraskevopoulou S., Parrish C. R., Pauvolid-Correa A., Paweska J. T., Perez D. R., Pfaff F., Plemper R. K., Postler T. S., Rabbidge L. O., Radoshitzky S. R., Ramos-Gonzalez P. L., Rehanek M., Resende R. O., Reyes C. A., Rodrigues T. C. S., Romanowski V., Rubbenstroth D., Rubino L., Runstadler J. A., Sabanadzovic S., Sadiq S., Salvato M. S., Sasaya T., Schwemmle M., Sharpe S. R., Shi M., Shimomoto Y., Sidharthan V. K., Sironi M., Smither S., Song J. -W., Spann K. M., Spengler J. R., Stenglein M. D., Takada A., Takeyama S., Tatara A., Tesh R. B., Thornburg N. J., Tian X., Tischler N. D., Tomitaka Y., Tomonaga K., Tordo N., Tu C., Turina M., Tzanetakis I. E., Vaira A. M., van den Hoogen B., Vanmechelen B., Vasilakis N., Verbeek M., von Bargen S., Wada J., Wahl V., Walker P. J., Waltzek T. B., Whitfield A. E., Wolf Y. I., Xia H., Xylogianni E., Yanagisawa H., Yano K., Ye G., Yuan Z., Zerbini F. M., Zhang G., Zhang S., Zhang Y. -Z., Zhao L., and Okland A. L.

Abstract

In April 2023, following the annual International Committee on Taxonomy of Viruses (ICTV) ratification vote on newly proposed taxa, the phylum Negarnaviricota was amended and emended. The phylum was expanded by one new family, 14 new genera, and 140 new species. Two genera and 538 species were renamed. One species was moved, and four were abolished. This article presents the updated taxonomy of Negarnaviricota as now accepted by the ICTV

Published
2023

10. Interprofessional safety reporting and review of adverse events and medication errors in critical care

Author

Chapuis C, Chanoine S, Colombet L, Calvino-Gunther S, Tournegros C, Terzi N, Bedouch P, and Schwebel C

Subjects
adverse event, medication error, safety, reporting, review, interprofessional, Therapeutics. Pharmacology, RM1-950
Abstract

Claire Chapuis,1 Sébastien Chanoine,1,2 Laurence Colombet,3 Silvia Calvino-Gunther,3 Caroline Tournegros,3 Nicolas Terzi,2–4 Pierrick Bedouch,1,2,5 Carole Schwebel2,3,6 1Pôle Pharmacie, CHU Grenoble Alpes, Grenoble 38000, France; 2Université Grenoble Alpes, Grenoble 38000, France; 3CHU Grenoble Alpes, Réanimation Médicale Pôle Urgences Médecine Aiguë, Grenoble 38000, France; 4INSERM, U1042, Université Grenoble-Alpes, HP2, Grenoble 38000, France; 5CNRS (UMR5525), TIMC-IMAG, Grenoble 38000, France; 6Inserm U1039 Radiopharmaceutiques Biocliniques, Domaine de la Merci, La Tronche 38700, France Background: The intensive care unit (ICU) environment is prone to the risk of adverse events (AEs) and medication errors (MEs). The objective of this work was to describe a multidisciplinary safety program focused on AE and ME reporting and review in an ICU over a 7-year period.Methods: The program was implemented in an 18-bed medical ICU of a 2,200-bed university hospital. A multidisciplinary steering committee (intensivist, clinical pharmacist, nurses, and research assistants) met monthly. The first part of the meeting was dedicated to the review of events targeted through an internal voluntary reporting system, and the second part concerned the analysis of the previous month’s events, according to a standardized method called Orion, inspired by the aeronautic industry.Results: A total of 808 AEs were reported, mostly related to medication processes (30.3% and 33.4% for prescription and administration, respectively). Among these, 526 AEs were related to medications (65.1%), of which 464 were MEs (88.2%). These MEs concerned mostly anti-infective drugs (23.5%) and related to wrong doses (35.8%). Among all AEs reported, 58 (43 MEs [74.1%]) were analyzed further and found to be associated with anti-infective (16.1%) and vasoactive drugs (16.1%). According to National Coordinating Council for Medication Error Reporting and Prevention classification, most AEs caused no harm to patients (category A–D: 38 events, 65.5%). Nurses were most often involved in the analysis (50.7%), along with pharmacists (37.5%). Training was identified as the most frequent corrective action (45.1%).Conclusion: This program dedicated to AE and ME reporting, review, and analysis in ICU showed long-term engagement of the health care team in AE surveillance and helped in targeting measures for education, organization, and promoting teamwork and safety. Keywords: adverse event, medication error, safety, reporting, review, interprofessional

Published
2019

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