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21 results on '"Sprung P"'

3. Exploring non-equilibrium processes and spatio-temporal scaling laws in heated egg yolk using coherent X-rays

Author

Anthuparambil, Nimmi Das, Girelli, Anita, Timmermann, Sonja, Kowalski, Marvin, Akhundzadeh, Mohammad Sayed, Retzbach, Sebastian, Senft, Maximilian D., Dargasz, Michelle, Gutmüller, Dennis, Hiremath, Anusha, Moron, Marc, Öztürk, Özgül, Poggemann, Hanna-Friederike, Ragulskaya, Anastasia, Begam, Nafisa, Tosson, Amir, Paulus, Michael, Westermeier, Fabian, Zhang, Fajun, Sprung, Michael, Schreiber, Frank, and Gutt, Christian

Published
2023
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5. Integrated analysis of cervical squamous cell carcinoma cohorts from three continents reveals conserved subtypes of prognostic significance

Author

Chakravarthy, Ankur, Reddin, Ian, Henderson, Stephen, Dong, Cindy, Kirkwood, Nerissa, Jeyakumar, Maxmilan, Rodriguez, Daniela Rothschild, Martinez, Natalia Gonzalez, McDermott, Jacqueline, Su, Xiaoping, Egawa, Nagayasau, Fjeldbo, Christina S., Skingen, Vilde Eide, Lyng, Heidi, Halle, Mari Kyllesø, Krakstad, Camilla, Soleiman, Afschin, Sprung, Susanne, Lechner, Matt, Ellis, Peter J. I., Wass, Mark, Michaelis, Martin, Fiegl, Heidi, Salvesen, Helga, Thomas, Gareth J., Doorbar, John, Chester, Kerry, Feber, Andrew, and Fenton, Tim R.

Published
2022
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7. Spatially resolved fluorescence of caesium lead halide perovskite supercrystals reveals quasi-atomic behavior of nanocrystals

Author

Lapkin, Dmitry, Kirsch, Christopher, Hiller, Jonas, Andrienko, Denis, Assalauova, Dameli, Braun, Kai, Carnis, Jerome, Kim, Young Yong, Mandal, Mukunda, Maier, Andre, Meixner, Alfred J., Mukharamova, Nastasia, Scheele, Marcus, Schreiber, Frank, Sprung, Michael, Wahl, Jan, Westendorf, Sophia, Zaluzhnyy, Ivan A., and Vartanyants, Ivan A.

Published
2022
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8. Somatostatin receptor 2 expression in nasopharyngeal cancer is induced by Epstein Barr virus infection: impact on prognosis, imaging and therapy

Author

Lechner, Matt, Schartinger, Volker H., Steele, Christopher D., Nei, Wen Long, Ooft, Marc Lucas, Schreiber, Liesa-Marie, Pipinikas, Christodoulos P., Chung, Grace Tin-Yun, Chan, Yuk Yu, Wu, Feng, To, Ka-Fai, Tsang, Chi Man, Pearce, Wayne, Morelli, Daniele, Philpott, Martin, Masterson, Liam, Nibhani, Reshma, Wells, Graham, Bell, Christopher G., Koller, Julia, Delecluse, Susanne, Yip, Yim Ling, Liu, Jacklyn, Forde, Cillian T., Forster, Martin D., Jay, Amrita, Dudás, József, Krapp, Annika, Wan, Simon, Uprimny, Christian, Sprung, Susanne, Haybaeck, Johannes, Fenton, Tim R., Chester, Kerry, Thirlwell, Christina, Royle, Gary, Marafioti, Teresa, Gupta, Rajeev, Indrasari, Sagung Rai, Herdini, Camelia, Slim, Mohd Afiq Mohd, Indrawati, I., Sutton, Liam, Fles, Renske, Tan, Bing, Yeong, Joe, Jain, Amit, Han, Shuting, Wang, Haitao, Loke, Kelvin S. H., He, Wan, Xu, Ruilian, Jin, Hongtao, Cheng, Zhiqiang, Howard, David, Hwang, Peter H., Le, Quynh-Thu, Tay, Joshua K., West, Robert B., Tsao, Sai Wah, Meyer, Tim, Riechelmann, Herbert, Oppermann, Udo, Delecluse, Henri-Jacques, Willems, Stefan M., Chua, Melvin L. K., Busson, Pierre, Lo, Kwok Wai, Wollmann, Guido, Pillay, Nischalan, Vanhaesebroeck, Bart, and Lund, Valerie J.

Published
2021
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9. Dietary lipids fuel GPX4-restricted enteritis resembling Crohn’s disease

Author

Mayr, Lisa, Grabherr, Felix, Schwärzler, Julian, Reitmeier, Isabelle, Sommer, Felix, Gehmacher, Thomas, Niederreiter, Lukas, He, Gui-Wei, Ruder, Barbara, Kunz, Kai T. R., Tymoszuk, Piotr, Hilbe, Richard, Haschka, David, Feistritzer, Clemens, Gerner, Romana R., Enrich, Barbara, Przysiecki, Nicole, Seifert, Markus, Keller, Markus A., Oberhuber, Georg, Sprung, Susanne, Ran, Qitao, Koch, Robert, Effenberger, Maria, Tancevski, Ivan, Zoller, Heinz, Moschen, Alexander R., Weiss, Günter, Becker, Christoph, Rosenstiel, Philip, Kaser, Arthur, Tilg, Herbert, and Adolph, Timon E.

Published
2020
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11. Unraveling the synergistic effects of Cu-Ag tandem catalysts during electrochemical CO2 reduction using nanofocused X-ray probes

Author

Marvin L. Frisch, Longfei Wu, Clément Atlan, Zhe Ren, Madeleine Han, Rémi Tucoulou, Liang Liang, Jiasheng Lu, An Guo, Hong Nhan Nong, Aleks Arinchtein, Michael Sprung, Julie Villanova, Marie-Ingrid Richard, and Peter Strasser

Subjects
Science
Abstract

Abstract Controlling the selectivity of the electrocatalytic reduction of carbon dioxide into value-added chemicals continues to be a major challenge. Bulk and surface lattice strain in nanostructured electrocatalysts affect catalytic activity and selectivity. Here, we unravel the complex dynamics of synergistic lattice strain and stability effects of Cu-Ag tandem catalysts through a previously unexplored combination of in situ nanofocused X-ray absorption spectroscopy and Bragg coherent diffraction imaging. Three-dimensional strain maps reveal the lattice dynamics inside individual nanoparticles as a function of applied potential and product yields. Dynamic relations between strain, redox state, catalytic activity and selectivity are derived. Moderate Ag contents effectively reduce the competing evolution of H2 and, concomitantly, lead to an enhanced corrosion stability. Findings from this study evidence the power of advanced nanofocused spectroscopy techniques to provide new insights into the chemistry and structure of nanostructured catalysts.

Published
2023
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12. Probing three-dimensional mesoscopic interfacial structures in a single view using multibeam X-ray coherent surface scattering and holography imaging

Author

Miaoqi Chu, Zhang Jiang, Michael Wojcik, Tao Sun, Michael Sprung, and Jin Wang

Subjects
Science
Abstract

Abstract Visualizing surface-supported and buried planar mesoscale structures, such as nanoelectronics, ultrathin-film quantum dots, photovoltaics, and heterogeneous catalysts, often requires high-resolution X-ray imaging and scattering. Here, we discovered that multibeam scattering in grazing-incident reflection geometry is sensitive to three-dimensional (3D) structures in a single view, which is difficult in conventional scattering or imaging approaches. We developed a 3D finite-element-based multibeam-scattering analysis to decode the heterogeneous electric-field distribution and to faithfully reproduce the complex scattering and surface features. This approach further leads to the demonstration of hard-X-ray Lloyd’s mirror interference of scattering waves, resembling dark-field, high-contrast surface holography under the grazing-angle scattering conditions. A first-principles calculation of the single-view holographic images resolves the surface patterns’ 3D morphology with nanometer resolutions, which is critical for ultrafine nanocircuit metrology. The holographic method and simulations pave the way for single-shot structural characterization for visualizing irreversible and morphology-transforming physical and chemical processes in situ or operando.

Published
2023
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13. Exploring non-equilibrium processes and spatio-temporal scaling laws in heated egg yolk using coherent X-rays

Author

Nimmi Das Anthuparambil, Anita Girelli, Sonja Timmermann, Marvin Kowalski, Mohammad Sayed Akhundzadeh, Sebastian Retzbach, Maximilian D. Senft, Michelle Dargasz, Dennis Gutmüller, Anusha Hiremath, Marc Moron, Özgül Öztürk, Hanna-Friederike Poggemann, Anastasia Ragulskaya, Nafisa Begam, Amir Tosson, Michael Paulus, Fabian Westermeier, Fajun Zhang, Michael Sprung, Frank Schreiber, and Christian Gutt

Subjects
Science
Abstract

Abstract The soft-grainy microstructure of cooked egg yolk is the result of a series of out-of-equilibrium processes of its protein-lipid contents; however, it is unclear how egg yolk constituents contribute to these processes to create the desired microstructure. By employing X-ray photon correlation spectroscopy, we investigate the functional contribution of egg yolk constituents: proteins, low-density lipoproteins (LDLs), and yolk-granules to the development of grainy-gel microstructure and microscopic dynamics during cooking. We find that the viscosity of the heated egg yolk is solely determined by the degree of protein gelation, whereas the grainy-gel microstructure is controlled by the extent of LDL aggregation. Overall, protein denaturation-aggregation-gelation and LDL-aggregation follows Arrhenius-type time-temperature superposition (TTS), indicating an identical mechanism with a temperature-dependent reaction rate. However, above 75 °C TTS breaks down and temperature-independent gelation dynamics is observed, demonstrating that the temperature can no longer accelerate certain non-equilibrium processes above a threshold value.

Published
2023
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14. Strain and crystallographic identification of the helically concaved gap surfaces of chiral nanoparticles

Author

Sungwook Choi, Sang Won Im, Ji-Hyeok Huh, Sungwon Kim, Jaeseung Kim, Yae-Chan Lim, Ryeong Myeong Kim, Jeong Hyun Han, Hyeohn Kim, Michael Sprung, Su Yong Lee, Wonsuk Cha, Ross Harder, Seungwoo Lee, Ki Tae Nam, and Hyunjung Kim

Subjects
Science
Abstract

Abstract Identifying the three-dimensional (3D) crystal plane and strain-field distributions of nanocrystals is essential for optical, catalytic, and electronic applications. However, it remains a challenge to image concave surfaces of nanoparticles. Here, we develop a methodology for visualizing the 3D information of chiral gold nanoparticles ≈ 200 nm in size with concave gap structures by Bragg coherent X-ray diffraction imaging. The distribution of the high-Miller-index planes constituting the concave chiral gap is precisely determined. The highly strained region adjacent to the chiral gaps is resolved, which was correlated to the 432-symmetric morphology of the nanoparticles and its corresponding plasmonic properties are numerically predicted from the atomically defined structures. This approach can serve as a comprehensive characterization platform for visualizing the 3D crystallographic and strain distributions of nanoparticles with a few hundred nanometers, especially for applications where structural complexity and local heterogeneity are major determinants, as exemplified in plasmonics.

Published
2023
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15. Integrated analysis of cervical squamous cell carcinoma cohorts from three continents reveals conserved subtypes of prognostic significance

Author

Ankur Chakravarthy, Ian Reddin, Stephen Henderson, Cindy Dong, Nerissa Kirkwood, Maxmilan Jeyakumar, Daniela Rothschild Rodriguez, Natalia Gonzalez Martinez, Jacqueline McDermott, Xiaoping Su, Nagayasau Egawa, Christina S. Fjeldbo, Vilde Eide Skingen, Heidi Lyng, Mari Kyllesø Halle, Camilla Krakstad, Afschin Soleiman, Susanne Sprung, Matt Lechner, Peter J. I. Ellis, Mark Wass, Martin Michaelis, Heidi Fiegl, Helga Salvesen, Gareth J. Thomas, John Doorbar, Kerry Chester, Andrew Feber, and Tim R. Fenton

Subjects
Science
Abstract

Human papillomavirus (HPV) is a known cause of cervical cancer. Here, the authors perform a multi-omic analysis using published cervical squamous cell carcinoma cohorts from the USA, Europe, and SubSaharan Africa and identify two cervical squamous cell carcinoma subtypes that display prognostic differences.

Published
2022
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16. Imaging the facet surface strain state of supported multi-faceted Pt nanoparticles during reaction

Author

Maxime Dupraz, Ni Li, Jérôme Carnis, Longfei Wu, Stéphane Labat, Corentin Chatelier, Rim van de Poll, Jan P. Hofmann, Ehud Almog, Steven J. Leake, Yves Watier, Sergey Lazarev, Fabian Westermeier, Michael Sprung, Emiel J. M. Hensen, Olivier Thomas, Eugen Rabkin, and Marie-Ingrid Richard

Subjects
Science
Abstract

Understanding strain dynamics and their relationship with crystallographic facets have been largely unexplored. Here the authors demonstrate how the 3D lattice displacement and strain evolution depend on the crystallographic facets of Pt nanoparticles during CO oxidation reaction, providing new insights in the relationship between facet-related surface strain and chemistry.

Published
2022
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17. Spatially resolved fluorescence of caesium lead halide perovskite supercrystals reveals quasi-atomic behavior of nanocrystals

Author

Dmitry Lapkin, Christopher Kirsch, Jonas Hiller, Denis Andrienko, Dameli Assalauova, Kai Braun, Jerome Carnis, Young Yong Kim, Mukunda Mandal, Andre Maier, Alfred J. Meixner, Nastasia Mukharamova, Marcus Scheele, Frank Schreiber, Michael Sprung, Jan Wahl, Sophia Westendorf, Ivan A. Zaluzhnyy, and Ivan A. Vartanyants

Subjects
Science
Abstract

By utilizing spatially resolved fluorescence (-lifetime) measurements and high precision X-ray nanodiffraction, the authors correlate the influence of structural misalignment and fluorescence (-lifetime) properties of all-inorganic CsPbX3 (X– = Br–, Cl–) perovskite superlattices.

Published
2022
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18. Somatostatin receptor 2 expression in nasopharyngeal cancer is induced by Epstein Barr virus infection: impact on prognosis, imaging and therapy

Author

Matt Lechner, Volker H. Schartinger, Christopher D. Steele, Wen Long Nei, Marc Lucas Ooft, Liesa-Marie Schreiber, Christodoulos P. Pipinikas, Grace Tin-Yun Chung, Yuk Yu Chan, Feng Wu, Ka-Fai To, Chi Man Tsang, Wayne Pearce, Daniele Morelli, Martin Philpott, Liam Masterson, Reshma Nibhani, Graham Wells, Christopher G. Bell, Julia Koller, Susanne Delecluse, Yim Ling Yip, Jacklyn Liu, Cillian T. Forde, Martin D. Forster, Amrita Jay, József Dudás, Annika Krapp, Simon Wan, Christian Uprimny, Susanne Sprung, Johannes Haybaeck, Tim R. Fenton, Kerry Chester, Christina Thirlwell, Gary Royle, Teresa Marafioti, Rajeev Gupta, Sagung Rai Indrasari, Camelia Herdini, Mohd Afiq Mohd Slim, I. Indrawati, Liam Sutton, Renske Fles, Bing Tan, Joe Yeong, Amit Jain, Shuting Han, Haitao Wang, Kelvin S. H. Loke, Wan He, Ruilian Xu, Hongtao Jin, Zhiqiang Cheng, David Howard, Peter H. Hwang, Quynh-Thu Le, Joshua K. Tay, Robert B. West, Sai Wah Tsao, Tim Meyer, Herbert Riechelmann, Udo Oppermann, Henri-Jacques Delecluse, Stefan M. Willems, Melvin L. K. Chua, Pierre Busson, Kwok Wai Lo, Guido Wollmann, Nischalan Pillay, Bart Vanhaesebroeck, and Valerie J. Lund

Subjects
Science
Abstract

Nasopharyngeal carcinoma (NPC) lacks effective diagnostic and therapeutic strategies, in particular at advanced stages. Here, the authors show that expression of the somatostatin receptor 2 is induced by Epstein-Barr virus in NPC and has a key role in the diagnosis, imaging, targeted therapies and prognosis of NPC.

Published
2021
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19. Dietary lipids fuel GPX4-restricted enteritis resembling Crohn’s disease

Author

Lisa Mayr, Felix Grabherr, Julian Schwärzler, Isabelle Reitmeier, Felix Sommer, Thomas Gehmacher, Lukas Niederreiter, Gui-Wei He, Barbara Ruder, Kai T. R. Kunz, Piotr Tymoszuk, Richard Hilbe, David Haschka, Clemens Feistritzer, Romana R. Gerner, Barbara Enrich, Nicole Przysiecki, Markus Seifert, Markus A. Keller, Georg Oberhuber, Susanne Sprung, Qitao Ran, Robert Koch, Maria Effenberger, Ivan Tancevski, Heinz Zoller, Alexander R. Moschen, Günter Weiss, Christoph Becker, Philip Rosenstiel, Arthur Kaser, Herbert Tilg, and Timon E. Adolph

Subjects
Science
Abstract

Dietary lipids are linked to the development of inflammatory bowel diseases through unclear mechanisms. Here, the authors report that dietary polyunsaturated fatty acids trigger intestinal inflammation resembling aspects of Crohn’s disease, which is restricted by glutathione peroxidase 4 in the intestinal epithelium.

Published
2020
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20. Correlative microscopy approach for biology using X-ray holography, X-ray scanning diffraction and STED microscopy

Author

M. Bernhardt, J.-D. Nicolas, M. Osterhoff, H. Mittelstädt, M. Reuss, B. Harke, A. Wittmeier, M. Sprung, S. Köster, and T. Salditt

Subjects
Science
Abstract

X-ray techniques benefit from correlative imaging approaches, but combination with super-resolution microscopy has not been explored. Here the authors image the cardiomyocyte cytoskeleton by combining holographic X-ray imaging, X-ray scanning diffraction and STED in the same synchrotron endstation.

Published
2018
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21. Active site localization of methane oxidation on Pt nanocrystals

Author

Dongjin Kim, Myungwoo Chung, Jerome Carnis, Sungwon Kim, Kyuseok Yun, Jinback Kang, Wonsuk Cha, Mathew J. Cherukara, Evan Maxey, Ross Harder, Kiran Sasikumar, Subramanian K. R. S. Sankaranarayanan, Alexey Zozulya, Michael Sprung, Dohhyung Riu, and Hyunjung Kim

Subjects
Science
Abstract

The structural changes at low-coordination sites of nanocatalysts such as edges, remain poorly understood. Here, the authors report observations of high-lattice distortion at edges of Pt nanocrystals during heterogeneous catalytic methane oxidation by using in situ 3D Bragg coherent X-ray diffraction imaging.

Published
2018
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