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Tran TA, Petrov DN, Phan TL, Tu BD, Nhat HN, Tran HC, Weise B, Cwik J, Koshkid'ko YS, Manh TV, Hoang TP, Dang NT. Investigating the magnetic and magnetocaloric behaviors of LiSm(PO 3) 4. RSC Adv 2023; 13:5753-5761. [PMID: 36816081 PMCID: PMC9929621 DOI: 10.1039/d2ra08077j] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2022] [Accepted: 02/10/2023] [Indexed: 02/17/2023] Open
Abstract
We report a detailed study on the magnetic behaviors and magnetocaloric (MC) effect of a single crystal of lithium samarium tetraphosphate, LiSm(PO3)4. The analyses of temperature-dependent magnetization data have revealed magnetic ordering established with decreasing temperature below T p, where T p is the minimum of a dM/dT vs. T curve and varies as a linear function of the applied field H. The Curie temperature has been extrapolated from T p(H) data, as H → 0, to be about 0.51 K. The establishment of magnetic-ordering causes a substantial change in the heat capacity C p. Above T p, the crystal exhibits paramagnetic behavior. Using the Curie-Weiss (CW) law and Arrott plots, we have found the crystal to have a CW temperature θ CW ≈ -36 K, and short-range magnetic order associated with a coexistence of antiferromagnetic and ferromagnetic interactions ascribed to the couplings of magnetic dipoles and octupoles at the Γ7 and Γ8 states. An assessment of the MC effect has shown increases in value of the absolute magnetic-entropy change (|ΔS m|) and adiabatic-temperature change (ΔT ad) when lowering the temperature to 2 K, and increasing the magnetic-field H magnitude. Around 2 K, the maximum value of |ΔS m| is about 3.6 J kg-1 K-1 for the field H = 50 kOe, and ΔT ad is about 5.8 K for H = 20 kOe, with the relative cooling power (RCP) of ∼82.5 J kg-1. In spite of a low MC effect in comparison to Li(Gd,Tb,Ho)(PO3)4, the absence of magnetic hysteresis reflects that LiSm(PO3)4 is also a candidate for low-temperature MC applications below 25 K.
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Affiliation(s)
- T. A. Tran
- Department of Physics, Ho Chi Minh City University of Technology and Education700000 HochiminhVietnam
| | - Dimitar N. Petrov
- Department of Physical Chemistry, Plovdiv University “Paisii Hilendarski”24 Tzar Asen Str.4000 PlovdivBulgaria
| | - T. L. Phan
- Faculty of Engineering Physics and Nanotechnology, VNU-University of Engineering and Technology144 Xuan Thuy, Cau GiayHanoiVietnam,Department of Physics and Oxide Research Center, Hankuk University of Foreign StudiesYongin 449-791South Korea
| | - B. D. Tu
- Faculty of Engineering Physics and Nanotechnology, VNU-University of Engineering and Technology144 Xuan Thuy, Cau GiayHanoiVietnam
| | - H. N. Nhat
- Faculty of Engineering Physics and Nanotechnology, VNU-University of Engineering and Technology144 Xuan Thuy, Cau GiayHanoiVietnam
| | - H. C. Tran
- Department of Physics, Ho Chi Minh City University of Technology and Education700000 HochiminhVietnam
| | - B. Weise
- Leibniz IFW Dresden, Institute for Complex MaterialsD-01069DresdenGermany
| | - J. Cwik
- Institute of Low Temperature and Structure Research, PASOkólna 250-422 WroclawPoland
| | - Yu S. Koshkid'ko
- Institute of Low Temperature and Structure Research, PASOkólna 250-422 WroclawPoland
| | - T. V. Manh
- Phenikaa University Nano Institute (PHENA), Phenikaa UniversityHanoi 12116Vietnam
| | - T. P. Hoang
- Faculty of Environmental and Natural Sciences, Duy Tan University550000 DanangVietnam,Laboratory Center, Duy Tan University550000 DanangVietnam
| | - N. T. Dang
- Faculty of Environmental and Natural Sciences, Duy Tan University550000 DanangVietnam,Institute of Research and Development, Duy Tan University550000 DanangVietnam
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Humbel N, Messerli-Bürgy N, Schuck K, Wyssen A, Garcia-Burgos D, Biedert E, Lennertz J, Meyer AH, Whinyates K, Isenschmid B, Milos G, Trier S, Adolph D, Cwik J, Margraf J, Assion HJ, Teismann T, Ueberberg B, Juckel G, Müller J, Klauke B, Schneider S, Munsch S. Self-reported emotion regulation difficulties are associated with mood but not with the biological stress response to thin ideal exposure. PLoS One 2018; 13:e0199769. [PMID: 29949642 PMCID: PMC6021103 DOI: 10.1371/journal.pone.0199769] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2018] [Accepted: 06/13/2018] [Indexed: 01/25/2023] Open
Abstract
BACKGROUND Difficulties in emotion regulation have been related to psychological and physiological stress responses such as lower mood and lower parasympathetic activation (HF-HRV) under resting condition, but evidence on the potential link to the hypothalamic-pituitary-adrenal (HPA) axis functioning and to physiological stress responses during a stress task is still scarce. The aim of the study was to investigate stress responses in young women when confronted to a daily stressor such as exposure to thin ideals and to understand the role of correlates of self-reported trait-like emotion regulation difficulties (ERD). METHODS Heart rate variability (HRV) and salivary cortisol data were collected in a sample of 273 young women aged 18-35 with and without mental disorders during a vivid imagination of thin ideals (experimental condition) or landscapes (control condition). Changes in mood states were measured on a visual analogue scale (0-100). Correlates of trait-like ERD were self-reported using the Difficulties in Emotion Regulation Scale (DERS). RESULTS Participants with higher ERD showed a stronger decline in self-reported mood after vivid imagination of thin ideals compared to participants with lower ERD in the experimental condition but also a stronger increase of positive mood with increasing ERD in the control condition. ERD were not related to baseline HF-HRV or baseline salivary cortisol levels nor to any physiological response during and after the imagination of thin ideals. DISCUSSION AND CONCLUSION The results corroborate the role of ERD regarding the immediate psychological impact of daily stressors. Exposition to daily stressors in the laboratory results in discrepant psychological and physiological reactivity. Future studies should investigate under what conditions the complex interrelations between immediate and long-term ERD and biological activation are amenable to assessment in a laboratory setting. The additive effects of multiple exposition to stressors, such as thin ideals in daily life, also need to be addressed.
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Affiliation(s)
- Nadine Humbel
- Clinical Psychology and Psychotherapy, Department of Clinical Psychology, University of Fribourg, Fribourg, Switzerland
| | - Nadine Messerli-Bürgy
- Clinical Psychology and Psychotherapy, Department of Clinical Psychology, University of Fribourg, Fribourg, Switzerland
| | - Kathrin Schuck
- Faculty of Psychology, Mental Health Research and Treatment Center, Ruhr-Universität Bochum, Bochum, Germany
| | - Andrea Wyssen
- Clinical Psychology and Psychotherapy, Department of Clinical Psychology, University of Fribourg, Fribourg, Switzerland
| | - David Garcia-Burgos
- Clinical Psychology and Psychotherapy, Department of Clinical Psychology, University of Fribourg, Fribourg, Switzerland
| | - Esther Biedert
- Clinical Psychology and Psychotherapy, Department of Clinical Psychology, University of Fribourg, Fribourg, Switzerland
| | - Julia Lennertz
- Faculty of Psychology, Mental Health Research and Treatment Center, Ruhr-Universität Bochum, Bochum, Germany
| | - Andrea H. Meyer
- Clinical Psychology and Psychotherapy, Department of Clinical Psychology, University of Fribourg, Fribourg, Switzerland
- Department of Psychology, Division of Clinical Psychology and Epidemiology, University of Basel, Basel, Switzerland
| | | | - Bettina Isenschmid
- Kompetenzzentrum für Essstörungen und Adipositas (KEA), Spital Zofingen, Zofingen, Switzerland
| | - Gabriella Milos
- Klinik für Psychiatrie und Psychotherapie, Universitätsspital Zürich, Zürich, Switzerland
| | | | - Dirk Adolph
- Faculty of Psychology, Mental Health Research and Treatment Center, Ruhr-Universität Bochum, Bochum, Germany
| | - Jan Cwik
- Faculty of Psychology, Mental Health Research and Treatment Center, Ruhr-Universität Bochum, Bochum, Germany
| | - Jürgen Margraf
- Faculty of Psychology, Mental Health Research and Treatment Center, Ruhr-Universität Bochum, Bochum, Germany
| | - Hans-Jörg Assion
- LWL-Klinik Dortmund, Department of Psychiatry, Psychotherapy and Psychosomatic Medicine, Dortmund, Germany
| | - Tobias Teismann
- Faculty of Psychology, Mental Health Research and Treatment Center, Ruhr-Universität Bochum, Bochum, Germany
| | - Bianca Ueberberg
- LWL-Klinik Dortmund, Department of Psychiatry, Psychotherapy and Psychosomatic Medicine, Dortmund, Germany
| | - Georg Juckel
- Department of Psychiatry, Psychotherapy and Preventive Medicine, Ruhr University Bochum, LWL University Hospital, Bochum, Germany
| | - Judith Müller
- Christoph-Dornier-Clinic for Psychotherapy, Münster, Germany
| | - Benedikt Klauke
- Christoph-Dornier-Clinic for Psychotherapy, Münster, Germany
| | - Silvia Schneider
- Faculty of Psychology, Mental Health Research and Treatment Center, Ruhr-Universität Bochum, Bochum, Germany
| | - Simone Munsch
- Clinical Psychology and Psychotherapy, Department of Clinical Psychology, University of Fribourg, Fribourg, Switzerland
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Sartory G, Röper G, Pietrowsky R, Cwik J, Zaudig M. Symptomkategorien der Zwangsstörung–spezifisch oder generalisiert? Zeitschrift für Klinische Psychologie und Psychotherapie 2013. [DOI: 10.1026/1616-3443/a000197] [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: 11/04/2022]
Abstract
Theoretischer Hintergrund: Die meisten diagnostischen Instrumente stellen bei Zwangsstörung, bzw. den Symptomkategorien Zwangsgedanken und -handlungen, in erster Linie den Schweregrad und nicht deren Generalisierung fest. Fragestellung: Sind Zwangsgedanken bzw. -handlungen situationsspezifisch oder generalisiert auf viele Bereiche? Methode: 142 Patienten mit Zwangsstörung und 21 gesunde Kontrollprobanden erhielten eine deutsche Version des VOCI, das Zwangssymptome in einer Anzahl von Situationen erfragt und die Subskalen der Y-BOCS, die den Schweregrad von Zwangshandlungen und –gedanken erheben. Patienten wurden mit den Kontrollprobanden hinsichtlich der Skalen verglichen. In der Gruppe der Patienten wurden die VOCI Items einer Faktorenanalyse unterzogen und die Faktorenscores mit dem Y-BOCS korreliert. Ergebnisse: Die Patienten unterschieden sich signifikant von den Kontrollprobanden hinsichtlich beider Zwangsfragebogen. Das 6-Faktorenmodell des deutschen VOCI entsprach dem der Originalfassung. Die Y-BOCS Subskalen waren nur moderat mit den entsprechenden VOCI Faktoren korreliert. Unter Patienten mit hoher Ausprägung der Y-BOCS befanden sich solche mit hohen (generalisierten), aber auch mit niedrigen (spezifischen) VOCI Faktorscores. Schlussfolgerungen: Die Ergebnisse lassen auf individuelle Unterschiede hinsichtlich der Spezifität oder Generalisierung der Symptomkategorien unter Zwangspatienten schließen.
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Affiliation(s)
- Gudrun Sartory
- Klinische Psychologie und Psychotherapie, Bergische Universität Wuppertal
| | - Gisela Röper
- AVM (Arbeitsgemeinschaft für VerhaltensModifikation) München
| | - Reinhard Pietrowsky
- Klinische Psychologie und Psychotherapie, Heinrich-Heine-Universität Düsseldorf
| | - Jan Cwik
- Klinische Psychologie und Psychotherapie, Bergische Universität Wuppertal
| | - Michael Zaudig
- Klinik für Psychosomatische Medizin und Psychotherapie Windach
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Sartory G, Cwik J, Knuppertz H, Schürholt B, Lebens M, Seitz RJ, Schulze R. In search of the trauma memory: a meta-analysis of functional neuroimaging studies of symptom provocation in posttraumatic stress disorder (PTSD). PLoS One 2013; 8:e58150. [PMID: 23536785 PMCID: PMC3607590 DOI: 10.1371/journal.pone.0058150] [Citation(s) in RCA: 126] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2012] [Accepted: 01/31/2013] [Indexed: 01/17/2023] Open
Abstract
Notwithstanding some discrepancy between results from neuroimaging studies of symptom provocation in posttraumatic stress disorder (PTSD), there is broad agreement as to the neural circuit underlying this disorder. It is thought to be characterized by an exaggerated amygdalar and decreased medial prefrontal activation to which the elevated anxiety state and concomitant inadequate emotional regulation are attributed. However, the proposed circuit falls short of accounting for the main symptom, unique among anxiety disorders to PTSD, namely, reexperiencing the precipitating event in the form of recurrent, distressing images and recollections. Owing to the technical demands, neuroimaging studies are usually carried out with small sample sizes. A meta-analysis of their findings is more likely to cast light on the involved cortical areas. Coordinate-based meta-analyses employing ES-SDM (Effect Size Signed Differential Mapping) were carried out on 19 studies with 274 PTSD patients. Thirteen of the studies included 145 trauma-exposed control participants. Comparisons between reactions to trauma-related stimuli and a control condition and group comparison of reactions to the trauma-related stimuli were submitted to meta-analysis. Compared to controls and the neutral condition, PTSD patients showed significant activation of the mid-line retrosplenial cortex and precuneus in response to trauma-related stimuli. These midline areas have been implicated in self-referential processing and salient autobiographical memory. PTSD patients also evidenced hyperactivation of the pregenual/anterior cingulate gyrus and bilateral amygdala to trauma-relevant, compared to neutral, stimuli. Patients showed significantly less activation than controls in sensory association areas such as the bilateral temporal gyri and extrastriate area which may indicate that the patients' attention was diverted from the presented stimuli by being focused on the elicited trauma memory. Being involved in associative learning and priming, the retrosplenial cortex may have an important function in relation to trauma memory, in particular, the intrusive reexperiencing of the traumatic event.
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Affiliation(s)
- Gudrun Sartory
- Clinical Psychology Unit, Department of Psychology, University of Wuppertal, Wuppertal, Germany.
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Schuricht AL, McCarthy CS, Wells WL, Kumor RJ, Cwik J. A comparison of epidural versus general anesthesia for outpatient endoscopic preperitoneal herniorrhaphy. JSLS 1997; 1:141-4. [PMID: 9876662 PMCID: PMC3021272] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
OBJECTIVES To study the efficacy of epidural versus general anesthesia on length of stay, patient recovery and anesthetic-related complications in patients undergoing endoscopic preperitoneal herniorrhaphy. METHODS One hundred sixty-seven consecutive patients undergoing endoscopic preperitoneal herniorrhaphy from July, 1994, to August, 1995, were retrospectively studied. A total of 243 herniorrhaphies were performed. Four patients required conversion of epidural anesthesia to general anesthesia because of inadequate sensory blockade (67/71; 94% success rate). One-hundred-forty-eight patients were available for review. Sixty-seven patients underwent successful epidural anesthesia during the case, while 81 patients were managed with general anesthesia. RESULTS Thirty patients (37%) receiving general anesthesia required interventions for nausea compared to only six patients (9.0%) in the epidural anesthesia group (p < 0.001). Thirty patients (37%) in the general anesthesia group required intervention because of complaints of pain, compared to 13 (19.4%) in the epidural group (p < 0.05). There were no differences between the two groups for length of stay in OR, PACU, or total hospital times. CONCLUSIONS The use of epidural anesthesia during the performance of endoscopic preperitoneal herniorrhaphy was associated with a decrease in the incidence of postoperative pain and nausea. The technique was successful in 94% of the cases in which it was used. Epidural anesthesia is recommended as an effective alternative to general anesthesia for the performance of outpatient endoscopic preperitoneal herniorrhaphy.
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Affiliation(s)
- A L Schuricht
- Department of Surgery, Pennsylvania Hospital, Philadelphia 19107, USA
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