1
|
Andersson Å. Comment on "Cumulant mapping as the basis of multi-dimensional spectrometry" by Leszek J. Frasinski, Phys. Chem. Chem. Phys., 2022, 24, 20776-20787. Phys Chem Chem Phys 2023; 25:32723-32725. [PMID: 37991802 DOI: 10.1039/d3cp02525j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2023]
Abstract
I state a general formula for the n-variate joint cumulant of the first order and prove that it satisfies the desired properties listed in Section 3.3 of Phys. Chem. Chem. Phys., 2022, 24, 20776-20787.
Collapse
Affiliation(s)
- Åke Andersson
- Department of Physics, University of Gothenburg, 412 96 Gothenburg, Sweden.
| |
Collapse
|
2
|
Labat M, Chubar O, Breunlin J, Hubert N, Andersson Å. Bending Magnet Synchrotron Radiation Imaging with Large Orbital Collection Angles. Phys Rev Lett 2023; 131:185001. [PMID: 37977618 DOI: 10.1103/physrevlett.131.185001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/24/2022] [Revised: 07/16/2023] [Accepted: 08/22/2023] [Indexed: 11/19/2023]
Abstract
Synchrotron radiation (SR) from bending magnets, wigglers, and undulators is now extensively produced for users at storage ring based light sources, with unique properties in terms of average brightness and stability. We present a profound study of bending magnet SR intensity distribution in the image plane of a focusing optical system. Measurements of this intensity distribution at the MAX-IV low emittance storage ring are compared to theoretical predictions, and found to be in excellent agreement. This work shows upon the possibility of performing high resolution emittance diagnostics with visible or near-visible SR on upcoming low-emittance storage ring based light sources. As a byproduct of our study, we derive a closed analytical expression for the intensity distribution from a zero-emittance beam, in the limiting case of wide orbital collection angles. This expression finally allows us to demonstrate the meeting between classical electrodynamics applied to SR emission and focusing, and the Landau and Lifshitz prediction of radiation intensity distribution nearby a caustic.
Collapse
Affiliation(s)
- M Labat
- Synchrotron SOLEIL, L'Orme des Merisiers, 91 190 Saint-Aubin, France
| | - O Chubar
- Brookhaven National Laboratory, Building 741, P.O. Box 5000, Upton, New York 11973-5000, USA
| | - J Breunlin
- MAX IV Laboratory, P.O. Box 118, SE-221 00 Lund, Sweden
| | - N Hubert
- Synchrotron SOLEIL, L'Orme des Merisiers, 91 190 Saint-Aubin, France
| | - Å Andersson
- MAX IV Laboratory, P.O. Box 118, SE-221 00 Lund, Sweden
| |
Collapse
|
3
|
Andersson Å, Yatsyna V, Linares M, Rijs A, Zhaunerchyk V. Indication of 3 10-Helix Structure in Gas-Phase Neutral Pentaalanine. J Phys Chem A 2023; 127:938-945. [PMID: 36669091 PMCID: PMC9900583 DOI: 10.1021/acs.jpca.2c07863] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
We investigate the gas-phase structure of the neutral pentaalanine peptide. The IR spectrum in the 340-1820 cm-1 frequency range is obtained by employing supersonic jet cooling, infrared multiphoton dissociation, and vacuum-ultraviolet action spectroscopy. Comparison with quantum chemical spectral calculations suggests that the molecule assumes multiple stable conformations, mainly of two structure types. In the most stable conformation theoretically found, the N-terminus forms a C5 ring and the backbone resembles that of an 310-helix with two β-turns. Additionally, the conformational preferences of pentaalanine have been evaluated using Born-Oppenheimer molecular dynamics, showing that a nonzero simulation time step causes a systematic frequency shift.
Collapse
Affiliation(s)
- Åke Andersson
- Department
of Physics, University of Gothenburg, 41296 Gothenburg, Sweden
| | - Vasyl Yatsyna
- Department
of Physics, University of Gothenburg, 41296 Gothenburg, Sweden,FELIX
Laboratory, Institute for Molecules and Materials, Radboud University, Toernooiveld 7, 6525 ED Nijmegen, The Netherlands,Laboratoire
de Chimie Physique Moléculaire, École
Polytechnique Fédérale de Lausanne, EPFL SB ISIC LCPM, Station 6, CH-1015 Lausanne, Switzerland
| | - Mathieu Linares
- Laboratory
of Organic Electronics and Group of Scientific Visualization Department
of Science and Technology (ITN), Linköping
University, 601 74 Norrköping, Sweden
| | - Anouk Rijs
- FELIX
Laboratory, Institute for Molecules and Materials, Radboud University, Toernooiveld 7, 6525 ED Nijmegen, The Netherlands,Division
of BioAnalytical Chemistry, AIMMS Amsterdam Institute of Molecular
and Life Sciences, Vrije Universiteit Amsterdam, De Boelelaan 1108, 1081 HV, Amsterdam, The Netherlands,
| | - Vitali Zhaunerchyk
- Department
of Physics, University of Gothenburg, 41296 Gothenburg, Sweden,
| |
Collapse
|
4
|
Andersson Å, Haglund E, Berthold E, Mogard E, Torell A, Olsson MC. POS0951 SERUM PROTEIN RESPONSE TO A SINGLE HIGH-INTENSITY INTERVAL TRAINING BOUT – COMPARISON BETWEEN INDIVIDUALS WITH SPONDYLOARTHRITIS AND HEALTHY CONTROLS. Ann Rheum Dis 2022. [DOI: 10.1136/annrheumdis-2022-eular.4984] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
BackgroundAxial spondyloarthritis (axSpA) is a chronic inflammatory disease affecting mainly the axial skeleton. To decrease the risk of cardiovascular comorbidity, aerobic training is recommended as a part of disease management in patients with axSpA. High-intensity interval training (HIIT) interventions are, in addition to other recommended treatments, believed to positively affect the disease activity (1). However, the knowledge about the acute effects of HIIT on the inflammatory process at the molecular level is less studied. Understanding the acute HIIT effects on cytokines and additional serum proteins in axSpA is important for further long-term HIIT interventions and recording of the effect of HIIT on the axSpA disease profile.ObjectivesTo study the acute effects on serum proteins, such as cytokines, myokines, and inflammatory- and bone-related proteins, in response to a single bout of HIIT, and to compare the levels between baseline and post-HIIT in patients with axSpA and healthy controls (HC).MethodsThe pilot study included twenty-one participants (10 female, 11 male), mean (SD) age 40 (7) years, ten with axSpA, and eleven age and sex matched HC, who performed a single HIIT on a cycle ergometer consisting of 4x4 minutes interval (90% heart rate, HR-max) with three minutes active rest in between (70% of HR-max). Disease activity (BASDAI, 0-10) in patients with axSpA was 1.6 (0.8). Health status EuroQol (EQ5D, 0-1) were 0.87 (0.11) for axSpA, and 0.93 (0.10) for HC. The groups were well matched with no difference in baseline data for weight, BMI, EQ5D, blood pressure or aerobic capacity.Blood samples were taken before (baseline) and one hour after the single HIIT. The following serum proteins were analyzed on a Luminex MAGPIX System (Luminex corporation, Austin, TX USA): Interleukin (IL)-6, IL-17, IL-18, TNFαAGPIX System (Luminex corporatiosteoprotegerin, osteocalcin, osteopontin, and FGF-23. A three-way analysis of variance (ANOVA) was used to detect differences between groups, between sexes, and before and after a HIIT bout in a 2(group)*2(sex)*2(time) design. For main effects or interactions significant at p≤0.05, simple effect t-tests were used to determine the specific effects.ResultsA group main effect (p=0.048) showed that the serum level of IL-6 was increased one hour after the HIIT session primarily in the HC, 0.4 pg/ml (SD±0.4) at baseline vs. post-HIIT 1.8 (2.0). The concentration of the cytokines/chemokine IL-17, IL-18, TNFα group main effect (p=0.048) showed that the serum level of IL-6 was increased one hour after the HIIT session primarily in30) in VEGF-A showed that the axSpA group had significantly lower VEGF-A at baseline, 159 pg/ml (138) vs 326 (184) in the control group (which might be due to anti-inflammatory medication). A sex main effect (p=0.029) was observed from baseline to post-HIIT for the bone hormone osteocalcin, with a more pronounced decrease of serum osteocalcin in women with axSpA, 14.0 ng/ml (8.3) vs. post HIIT 13.2 (6.9). Moreover, the level of the multifunctional protein osteopontin was significantly lower (sex main effect, p=0.021) in women, 10.7 ng/ml (7.0) vs. men 20.4 (10.1), post-HIIT.ConclusionThis pilot study shows that one bout of HIIT influences the expression of proteins involved in inflammation and metabolism, and that sex is an important factor in the response to HIIT. The results should be followed up in longer intervention studies including higher numbers of participants.References[1]Sveaas, S. H. et al. (2019). High intensity exercise for 3 months reduces disease activity in axial spondyloarthritis (axSpA): a multicentre randomised trial of 100 patients. British journal of sports medicine, 54(5), 292-297.Disclosure of InterestsÅsa Andersson: None declared, Emma Haglund Consultant of: Novartis, Emma Berthold: None declared, Elisabeth Mogard Consultant of: Novartis, Anna Torell: None declared, M Charlotte Olsson: None declared
Collapse
|
5
|
Andersson Å, Poline M, Houthuijs KJ, van Outersterp RE, Berden G, Oomens J, Zhaunerchyk V. IRMPD Spectroscopy of Homo- and Heterochiral Asparagine Proton-Bound Dimers in the Gas Phase. J Phys Chem A 2021; 125:7449-7456. [PMID: 34428065 PMCID: PMC8419839 DOI: 10.1021/acs.jpca.1c05667] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2021] [Revised: 08/11/2021] [Indexed: 12/16/2022]
Abstract
We investigate gas-phase structures of homo- and heterochiral asparagine proton-bound dimers with infrared multiphoton dissociation (IRMPD) spectroscopy and quantum-chemical calculations. Their IRMPD spectra are recorded at room temperature in the range of 500-1875 and 3000-3600 cm-1. Both varieties of asparagine dimers are found to be charge-solvated based on their IRMPD spectra. The location of the principal intramolecular H-bond is discussed in light of harmonic frequency analyses using the B3LYP functional with GD3BJ empirical dispersion. Contrary to theoretical analyses, the two spectra are very similar.
Collapse
Affiliation(s)
- Åke Andersson
- Department
of Physics, University of Gothenburg, 41296 Gothenburg, Sweden
| | - Mathias Poline
- Department
of Physics, Stockholm University, 10691 Stockholm, Sweden
| | - Kas J. Houthuijs
- FELIX
Laboratory, Institute for Molecules and Materials, Radboud University, Toernooiveld 7, 6525 ED Nijmegen, The Netherlands
| | - Rianne E. van Outersterp
- FELIX
Laboratory, Institute for Molecules and Materials, Radboud University, Toernooiveld 7, 6525 ED Nijmegen, The Netherlands
| | - Giel Berden
- FELIX
Laboratory, Institute for Molecules and Materials, Radboud University, Toernooiveld 7, 6525 ED Nijmegen, The Netherlands
| | - Jos Oomens
- FELIX
Laboratory, Institute for Molecules and Materials, Radboud University, Toernooiveld 7, 6525 ED Nijmegen, The Netherlands
| | - Vitali Zhaunerchyk
- Department
of Physics, University of Gothenburg, 41296 Gothenburg, Sweden
| |
Collapse
|
6
|
Andersson Å, Poline M, Kodambattil M, Rebrov O, Loire E, Maître P, Zhaunerchyk V. Structure of Proton-Bound Methionine and Tryptophan Dimers in the Gas Phase Investigated with IRMPD Spectroscopy and Quantum Chemical Calculations. J Phys Chem A 2020; 124:2408-2415. [PMID: 32106670 PMCID: PMC7307929 DOI: 10.1021/acs.jpca.9b11811] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
![]()
The
structures of three proton-bound dimers (Met2H+, MetTrpH+, and Trp2H+) are
investigated in the gas phase with infrared multiple photon disassociation
(IRMPD) spectroscopy in combination with quantum chemical calculations.
Their IRMPD spectra in the range of 600–1850 cm–1 are obtained experimentally using an FT-ICR mass spectrometer and
the CLIO free electron laser as an IR light source. The most abundant
conformers are elucidated by comparing the IRMPD spectra with harmonic
frequencies obtained at the B3LYP-GD3BJ/6-311++G** level of theory.
Discrepancies between the experimental and theoretical data in the
region of 1500–1700 cm–1 are attributed to
the anharmonicity of the amino bending modes. We confirm the result
of a previous IRMPD study that the structure of gas-phase Trp2H+ is charge-solvated but find that there are more
stable structures than originally reported (Feng, R.; Yin, H.; Kong,
X. Rapid Commun. Mass Spectrom.2016, 30, 24–28). In addition, gas-phase Met2H+ and MetTrpH+ have been revealed to
have charge-solvated structures. For all three dimers, the most stable
conformer is found to be of type A. The spectrum of Met2H+, however, cannot be explained without some abundance
of type B charge-solvated conformers as well as salt-bridged structures.
Collapse
Affiliation(s)
- Åke Andersson
- Chalmers University of Technology, 412 96 Gothenburg, Sweden
| | - Mathias Poline
- Department of Physics, Stockholm University, 114 19 Stockholm, Sweden
| | - Meena Kodambattil
- Department of Physics, University of Gothenburg, 405 30 Gothenburg, Sweden.,International School of Photonics, Cochin University of Science and Technology, Kochi, Kerala 682022, India
| | - Oleksii Rebrov
- Department of Physics, Stockholm University, 114 19 Stockholm, Sweden
| | - Estelle Loire
- Laboratoire de Chimie Physique (UMR8000), Université Paris-Sud, CNRS, Université Paris Saclay, Orsay 91405, France
| | - Philippe Maître
- Laboratoire de Chimie Physique (UMR8000), Université Paris-Sud, CNRS, Université Paris Saclay, Orsay 91405, France
| | - Vitali Zhaunerchyk
- Department of Physics, University of Gothenburg, 405 30 Gothenburg, Sweden
| |
Collapse
|
7
|
Tavares PF, Al-Dmour E, Andersson Å, Cullinan F, Jensen BN, Olsson D, Olsson DK, Sjöström M, Tarawneh H, Thorin S, Vorozhtsov A. Commissioning and first-year operational results of the MAX IV 3 GeV ring. J Synchrotron Radiat 2018; 25:1291-1316. [PMID: 30179168 PMCID: PMC6140400 DOI: 10.1107/s1600577518008111] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/16/2018] [Accepted: 06/01/2018] [Indexed: 05/12/2023]
Abstract
The MAX IV 3 GeV electron storage ring in Lund, Sweden, is the first of a new generation of light sources to make use of the multibend-achromat lattice (MBA) to achieve ultralow emitance and hence ultrahigh brightness and transverse coherence. The conceptual basis of the MAX IV 3 GeV ring project combines a robust lattice design with a number of innovative engineering choices: compact, multifunctional magnet blocks, narrow low-conductance NEG-coated copper vacuum chambers and a 100 MHz radio-frequency system with passively operated third-harmonic cavities for bunch lengthening. In this paper, commissioning and first-year operational results of the MAX IV 3 GeV ring are presented, highlighting those aspects that are believed to be most relevant for future MBA-based storage rings. The commissioning experience of the MAX IV 3 GeV ring offers in this way an opportunity for validation of concepts that are likely to be essential ingredients of future diffraction-limited light sources.
Collapse
Affiliation(s)
- Pedro F. Tavares
- MAX IV Laboratory, Lund University, PO Box 118, SE-22100 Lund, Sweden
- Correspondence e-mail:
| | - Eshraq Al-Dmour
- MAX IV Laboratory, Lund University, PO Box 118, SE-22100 Lund, Sweden
| | - Åke Andersson
- MAX IV Laboratory, Lund University, PO Box 118, SE-22100 Lund, Sweden
| | - Francis Cullinan
- MAX IV Laboratory, Lund University, PO Box 118, SE-22100 Lund, Sweden
| | - Brian N. Jensen
- MAX IV Laboratory, Lund University, PO Box 118, SE-22100 Lund, Sweden
| | - David Olsson
- MAX IV Laboratory, Lund University, PO Box 118, SE-22100 Lund, Sweden
| | - David K. Olsson
- MAX IV Laboratory, Lund University, PO Box 118, SE-22100 Lund, Sweden
| | - Magnus Sjöström
- MAX IV Laboratory, Lund University, PO Box 118, SE-22100 Lund, Sweden
| | - Hamed Tarawneh
- MAX IV Laboratory, Lund University, PO Box 118, SE-22100 Lund, Sweden
| | - Sara Thorin
- MAX IV Laboratory, Lund University, PO Box 118, SE-22100 Lund, Sweden
| | - Alexey Vorozhtsov
- MAX IV Laboratory, Lund University, PO Box 118, SE-22100 Lund, Sweden
| |
Collapse
|
8
|
Andersson Å, Frank C, Willman AML, Sandman PO, Hansebo G. Adverse events in nursing: A retrospective study of reports of patient and relative experiences. Int Nurs Rev 2015; 62:377-85. [PMID: 26109381 DOI: 10.1111/inr.12192] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
BACKGROUND Patient safety is an important global issue. While it is well known that patients can suffer from adverse events in nursing care, there is a lack of knowledge as to how they experience them. AIM To examine adverse events in nursing care as they are experienced by patients and relatives. METHODS This was a retrospective study taking both a qualitative and a quantitative approach. It was based on data regarding 242 adverse events in nursing care, as reported by patients and relatives to Sweden's Medical Responsibility Board, content analysis was used to analyse the reports. RESULTS Patients' and relatives' experiences were analysed into four categories of adverse events, as concerning participation, clinical judgement, nursing intervention and the essentials of care. LIMITATIONS The reports were classified by the Medical Responsibility Board, without a standardized system. The adverse events reported were few in number and were reported by patients and relatives only. CONCLUSION Lack of participation has negative consequences and contributes to adverse events. Adverse events occur through missed care as well as through carer errors. IMPLICATIONS ON NURSING AND HEALTH PRACTICE Nurses need to improve their skills that support patient participation. Patient participation needs to be incorporated into nurses' duties. IMPLICATIONS FOR NURSING AND HEALTH POLICY Resources for patients to participate in their own care needs to be a priority underpinning policy-making in health systems. Nursing education systems need to teach students about the value and benefits of involving patients in their care.
Collapse
Affiliation(s)
- Å Andersson
- Neurobiology, Care Sciences and Society, Karolinska Institutet, Stockholm, Sweden
| | - C Frank
- Neurobiology, Care Sciences and Society, Karolinska Institutet, Stockholm, Sweden
| | - A M L Willman
- Faculty of Health and Society, Malmö University, Malmö, Sweden
| | - P-O Sandman
- Neurobiology, Care Sciences and Society, Karolinska Institutet, Stockholm, Sweden
| | - G Hansebo
- Neurobiology, Care Sciences and Society, Karolinska Institutet, Stockholm, Sweden.,Health Care Sciences, Ersta Sköndal University Collage, Stockholm, Sweden
| |
Collapse
|
9
|
Tavares PF, Leemann SC, Sjöström M, Andersson Å. The MAX IV storage ring project. J Synchrotron Radiat 2014; 21:862-77. [PMID: 25177978 PMCID: PMC4181638 DOI: 10.1107/s1600577514011503] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/28/2014] [Accepted: 05/19/2014] [Indexed: 05/09/2023]
Abstract
The MAX IV facility, currently under construction in Lund, Sweden, features two electron storage rings operated at 3 GeV and 1.5 GeV and optimized for the hard X-ray and soft X-ray/VUV spectral ranges, respectively. A 3 GeV linear accelerator serves as a full-energy injector into both rings as well as a driver for a short-pulse facility, in which undulators produce X-ray pulses as short as 100 fs. The 3 GeV ring employs a multibend achromat (MBA) lattice to achieve, in a relatively short circumference of 528 m, a bare lattice emittance of 0.33 nm rad, which reduces to 0.2 nm rad as insertion devices are added. The engineering implementation of the MBA lattice raises several technological problems. The large number of strong magnets per achromat calls for a compact design featuring small-gap combined-function magnets grouped into cells and sharing a common iron yoke. The small apertures lead to a low-conductance vacuum chamber design that relies on the chamber itself as a distributed copper absorber for the heat deposited by synchrotron radiation, while non-evaporable getter (NEG) coating provides for reduced photodesorption yields and distributed pumping. Finally, a low main frequency (100 MHz) is chosen for the RF system yielding long bunches, which are further elongated by passively operated third-harmonic Landau cavities, thus alleviating collective effects, both coherent (e.g. resistive wall instabilities) and incoherent (intrabeam scattering). In this paper, we focus on the MAX IV 3 GeV ring and present the lattice design as well as the engineering solutions to the challenges inherent to such a design. As the first realisation of a light source based on the MBA concept, the MAX IV 3 GeV ring offers an opportunity for validation of concepts that are likely to be essential ingredients of future diffraction-limited light sources.
Collapse
Affiliation(s)
- Pedro F. Tavares
- MAX IV Laboratory, Lund University, PO Box 118, SE-221 00 Lund, Sweden
- Correspondence e-mail:
| | - Simon C. Leemann
- MAX IV Laboratory, Lund University, PO Box 118, SE-221 00 Lund, Sweden
| | - Magnus Sjöström
- MAX IV Laboratory, Lund University, PO Box 118, SE-221 00 Lund, Sweden
| | - Åke Andersson
- MAX IV Laboratory, Lund University, PO Box 118, SE-221 00 Lund, Sweden
| |
Collapse
|