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Peng Y, Salomoni D, Malinowski G, Zhang W, Hohlfeld J, Buda-Prejbeanu LD, Gorchon J, Vergès M, Lin JX, Lacour D, Sousa RC, Prejbeanu IL, Mangin S, Hehn M. In-plane reorientation induced single laser pulse magnetization reversal. Nat Commun 2023; 14:5000. [PMID: 37591992 PMCID: PMC10435580 DOI: 10.1038/s41467-023-40721-z] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2022] [Accepted: 08/08/2023] [Indexed: 08/19/2023] Open
Abstract
Single Pulse All Optical Switching represents the ability to reverse the magnetization of a nanostructure using a femtosecond single laser pulse without any applied field. Since the first switching experiments carried out on GdFeCo ferrimagnets, this phenomena has been only recently extended to a few other materials, MnRuGa alloys and Tb/Co multilayers with a very specific range of thickness and composition. Here, we demonstrate that single pulse switching can be obtained for a large range of rare earth-transition metal multilayers, making this phenomenon much more general. Surprisingly, the threshold fluence for switching is observed to be independent of the laser pulse duration. Moreover, at high laser intensities, concentric ring domain structures are induced. These striking features contrast to those observed in Gd based materials pointing towards a different reversal mechanism. Concomitant with the demonstration of an in-plane magnetization reorientation, a precessional reversal mechanism explains all the observed features.
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Affiliation(s)
- Y Peng
- Université de Lorraine, CNRS, IJL, F-54000, Nancy, France
| | - D Salomoni
- Univ Grenoble Alpes, CEA, CNRS, Grenoble INP, SPINTEC, 38000, Grenoble, France
| | - G Malinowski
- Université de Lorraine, CNRS, IJL, F-54000, Nancy, France.
| | - W Zhang
- Université de Lorraine, CNRS, IJL, F-54000, Nancy, France
- Anhui High Reliability Chips Engineering Laboratory, Hefei Innovation Research Institute, Beihang University, 230013, Hefei, China
- MIIT Key Laboratory of Spintronics, School of Integrated Circuit Science and Engineering, Beihang University, 100191, Beijing, China
| | - J Hohlfeld
- Université de Lorraine, CNRS, IJL, F-54000, Nancy, France
| | - L D Buda-Prejbeanu
- Univ Grenoble Alpes, CEA, CNRS, Grenoble INP, SPINTEC, 38000, Grenoble, France
| | - J Gorchon
- Université de Lorraine, CNRS, IJL, F-54000, Nancy, France
| | - M Vergès
- Université de Lorraine, CNRS, IJL, F-54000, Nancy, France
| | - J X Lin
- Université de Lorraine, CNRS, IJL, F-54000, Nancy, France
| | - D Lacour
- Université de Lorraine, CNRS, IJL, F-54000, Nancy, France
| | - R C Sousa
- Univ Grenoble Alpes, CEA, CNRS, Grenoble INP, SPINTEC, 38000, Grenoble, France
| | - I L Prejbeanu
- Univ Grenoble Alpes, CEA, CNRS, Grenoble INP, SPINTEC, 38000, Grenoble, France
| | - S Mangin
- Université de Lorraine, CNRS, IJL, F-54000, Nancy, France
| | - M Hehn
- Université de Lorraine, CNRS, IJL, F-54000, Nancy, France.
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Hohlfeld J, Vogel-Claussen J, Biller H, Berliner D, Berschneider K, Tillmann HC, Hiltl S, Bauersachs J, Welte T. Lungenentblähung mit Indacaterol/Glycopyrronium verbessert die kardiale Funktion bei COPD Patienten: Die CLAIM Studie. Pneumologie 2018. [DOI: 10.1055/s-0037-1619129] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Affiliation(s)
- J Hohlfeld
- Klinische Atemwegsforschung, Fraunhofer ITEM, Hannover
| | - J Vogel-Claussen
- Institut für Diagnostische und Interventionelle Radiologie, Medizinische Hochschule Hannover
| | - H Biller
- Klinische Atemwegsforschung, Fraunhofer ITEM, Hannover
| | - D Berliner
- Klinik für Kardiologie und Angiologie, Medizinische Hochschule Hannover
| | | | - HC Tillmann
- Novartis Institut für Biomedizinische Forschung, Basel
| | - S Hiltl
- Novartis Pharma GmbH, Nürnberg
| | - J Bauersachs
- Klinik für Kardiologie und Angiologie, Medizinische Hochschule Hannover
| | - T Welte
- Klinik für Pneumologie, Medizinische Hochschule Hannover
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Hohlfeld J, Biller H, Hagedorn I, Berliner D, Bauersachs J, Welte T, Vogel-Claussen J. Ein neuartiges Studiendesign mit Magnetresonanz-Bildgebungsverfahren zur Untersuchung des Effekts der Indacaterol/Glycopyrronium Fixdosiskombination auf die kardiale Funktion bei COPD Patienten: die CLAIM-Studie. Pneumologie 2016. [DOI: 10.1055/s-0036-1572020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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4
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Hohlfeld J, Krug N. Inhalative Provokationsverfahren inklusive segmentaler Provokationen. ALLERGOLOGIE 2016. [DOI: 10.1007/978-3-642-37203-2_46] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Hohlfeld J, Calverley P, Könen-Bergmann M, Metzdorf N, Bell S. Tiotropium Respimat: Comparison of bronchodilator efficacy of 5 and 2.5 µg doses. Pneumologie 2015. [DOI: 10.1055/s-0035-1544635] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Hohlfeld J, Furtwängler A, Könen-Bergmann M, Wallenstein G, Walter B, Bateman ED. Evaluating cardiac safety of tiotropium in patients with COPD: Combined analysis of Holter-ECG data from four trials. Pneumologie 2015. [DOI: 10.1055/s-0035-1544634] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Reither G, Heath N, Holz O, Kahn N, Hohlfeld J, Schultz C, Mall MA. Evaluation of small molecule FRET reporter for the diagnosis and monitoring of proteolytic activity in a chronic obstructive lung disease model. Pneumologie 2014. [DOI: 10.1055/s-0034-1376783] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Despars J, Muller-Nix C, Hohlfeld J. La chirurgie « esthétique » chez l'enfant porteur d'une fente faciale : aspects psychologiques. Arch Pediatr 2012. [DOI: 10.1016/s0929-693x(12)71141-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Hohlfeld J. Le questionnement du chirurgien vis-à-vis d’une demande esthétique de l’enfant. Arch Pediatr 2012. [DOI: 10.1016/s0929-693x(12)71140-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Holz O, Schaumann F, Janssen O, Lavae-Mokhtari B, Witte L, Krug N, Biller H, Hohlfeld J. Neutrophile Atemwegsentzündung in gesunden Probanden nach niedrig dosierter inhalativer Endotoxin- (LPS) Provokation. Pneumologie 2012. [DOI: 10.1055/s-0032-1302717] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Holz O, Schaumann F, Janssen O, Lavae-Mokhtari B, Witte L, Krug N, Heinrich JM, Hohlfeld J. Depletion von neutrophilen Granulozyten aus induziertem Sputum mittels Antikörper-gebundener Beads und Sieb-Trennsystem. Pneumologie 2012. [DOI: 10.1055/s-0032-1302716] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Fischer CJ, Giannoni E, Truttmann AC, Tolsa JF, Chevallay M, El Ezzi O, Seneggen E, Hohlfeld J, de Buys Roessingh A, Pauchard JY, Gehri M, Hauschild M. [Pediatrics]. Rev Med Suisse 2012; 8:51-56. [PMID: 22303741] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Several preliminary studies suggest that prophylactic administration of probiotics reduces the incidence of necrotizing enterocolitis (NEC) in preterm infants, and several neonatology units have introduced this treatment under strict surveillance. Nonetheless, breast milk feeding remains the mainstay of NEC prevention. The beta-blocker propranolol, known for its effectiveness on cutaneous hemangiomas, is also proving useful for the treatment of subglottic or visceral hemangiomas. Following the decrease in severe bacterial infections thanks to widespread vaccinations, the McCarthy clinical score has regained importance in the prediction of the risk of bacterial infection in febrile infants. It is easy to use, economical, and has a diagnostic value comparable to laboratory tests. The new WHO growth charts have been introduced in Switzerland in 2011 to take into account the increasing regional and ethnic variations in our country. Any significant change in growth velocity should prompt an evaluation of the need of further investigations.
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Affiliation(s)
- C J Fischer
- Service de néonatologie, Département médico-chirurgical de pédiatrie, Hôpital de l'enfance, CHUV et Université de Lausanne
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Guye E, Chollet-Rivier M, Schröder D, Sandu K, Hohlfeld J, de Buys Roessingh A. Propranolol treatment for subglottic haemangioma. Arch Dis Child Fetal Neonatal Ed 2011; 96:F263-4. [PMID: 21242239 DOI: 10.1136/adc.2010.201905] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Affiliation(s)
- E Guye
- Department of Pediatric Surgery, University Hospital Center of the Canton of Vaud, Lausanne, Switzerland
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Knothe S, Mutschler V, Rochlitzer S, Winkler C, Ebensen T, Guzman CA, Hohlfeld J, Braun A, Muller M. The NKT cell ligand αgalactosylceramide suppresses allergic airway inflammation by induction of a Th1 response. Vaccine 2011; 29:4249-55. [PMID: 21463684 DOI: 10.1016/j.vaccine.2011.03.068] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2010] [Revised: 03/13/2011] [Accepted: 03/18/2011] [Indexed: 11/19/2022]
Abstract
One experimental approach for the treatment of allergic reactions is the stimulation of immunoregulatory NKT cells with the synthetic glycolipid αgalactosylceramide. For a first evaluation of the immunomodulatory potential of αGalCerMPEG a human in vitro allergy model was exploited. Acting as an adjuvant, the glycolipid induced an enhanced Th1-biased allergen-specific immune response of autologous lymphocytes. In a mouse model of allergic airway inflammation, αGalCerMPEG-activated NKT cells promoted a cytokine environment in the spleen, leading to priming of Th1 cells. The shift towards a Th1-dominated allergen-specific immune response thus might mediate the abrogation of allergic airway inflammation and thereby might provide a valid option for therapeutic intervention.
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Affiliation(s)
- S Knothe
- Fraunhofer Institute for Toxicology and Experimental Medicine, Department of Immunology, Allergology and Immunotoxicology, Nikolai-Fuchs-Str. 1, 30625 Hannover, Germany
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15
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Koczulla R, Hattesohl A, Biller H, Hofbauer J, Hohlfeld J, Oeser C, Wirtz H, Jörres RA. [Comparison of four identical electronic noses and three measurement set-ups]. Pneumologie 2011; 65:465-70. [PMID: 21437859 DOI: 10.1055/s-0030-1256280] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
BACKGROUND Volatile organic compounds (VOCs) can be used as biomarkers in exhaled air. VOC profiles can be detected by an array of nanosensors of an electronic nose. These profiles can be analysed using bioinformatics. It is, however, not known whether different devices of the same model measure identically and to which extent different set-ups and the humidity of the inhaled air influence the VOC profile. METHODS Three different measuring set-ups were designed and three healthy control subjects were measured with each of them, using four devices of the same model (Cyranose 320™, Smiths Detection). The exhaled air was collected in a plastic bag. Either ambient air was used as reference (set-up Leipzig), or the reference air was humidified (100% relative humidity) (set-up Marburg and set-up Munich). In the set-up Marburg the subjects inhaled standardised medical air (Aer medicinalis Linde, AGA AB) out of a compressed air bottle through a demand valve; this air (after humidification) was also used as reference. In the set-up Leipzig the subjects inhaled VOC-filtered ambient air, in the set-up Munich unfiltered room air. The data were evaluated using either the real-time data or the changes in resistance as calculated by the device. RESULTS The results were clearly dependent on the set-up. Apparently, humidification of the reference air could reduce the variance between devices, but this result was also dependent on the evaluation method used. When comparing the three subjects, the set-ups Munich and Marburg mapped these in a similar way, whereas not only the signals but also the variance of the set-up Leipzig were larger. CONCLUSION Measuring VOCs with an electronic nose has not yet been standardised and the set-up significantly affects the results. As other researchers use further methods, it is currently not possible to draw generally accepted conclusions. More systematic tests are required to find the most sensitive and reliable but still feasible set-up so that comparability is improved.
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Affiliation(s)
- R Koczulla
- Klinik für Innere Medizin, Schwerpunkt Pneumologie, Philipps-Universität Marburg, Germany.
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Koczulla A, Hattesohl A, Biller H, Hofbauer J, Hohlfeld J, Oeser C, Gessner C, Vogelmeier C, Baumbach J, Wirtz H, Jörres R. Krankheiten erriechen? Eine kurze Übersicht über elektronische Nasen. Pneumologie 2011; 65:401-5. [DOI: 10.1055/s-0030-1256252] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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17
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Holz O, Zesiger T, lavae-Mokhtari B, Schuchardt I, Krug N, Hohlfeld J. Analyse von volatilen Substanzen in der Ausatemluft mit der SMart-Nose®. Pneumologie 2011. [DOI: 10.1055/s-0031-1272249] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Despars J, Hohlfeld J, Muller-Nix C. Les brûlures de A à Z : psychologie, impact sur l’enfant et sa famille. Arch Pediatr 2010; 17:888-9. [DOI: 10.1016/s0929-693x(10)70163-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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de Buys Roessingh AS, Herzog G, Zbinden-Trichet C, Hohlfeld J. Fentes faciales – La séquence de Pierre Robin : choix parmi plusieurs protocoles de traitement. Arch Pediatr 2010; 17:787-8. [DOI: 10.1016/s0929-693x(10)70111-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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De Buys Roessingh A, Hirt-Burri N, Kucera P, Scaletta C, Applegate L, Hohlfeld J. CL149 - Thérapie foetale : analyse biomécanique musculaire sur un modèle de souris. Arch Pediatr 2010. [DOI: 10.1016/s0929-693x(10)70370-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Trichet-Zbinden C, de Buys Roessingh A, Herzog G, Martinez H, Oger P, Delerive-Taieb MF, Soupre V, Picard A, Vazquez MP, Galliani E, Hohlfeld J. Fentes labio-palatines : guidance orthophonique au sein de l’équipe pluridisciplinaire. Arch Pediatr 2010; 17:790-1. [DOI: 10.1016/s0929-693x(10)70113-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Knothe S, Mutschler V, Rochlitzer S, Winkler C, Ebensen T, Guzman CA, Hohlfeld J, Braun A, Muller M. Local treatment with BPPcysMPEG reduces allergic airway inflammation in sensitized mice. Immunobiology 2010; 216:110-7. [PMID: 20619481 DOI: 10.1016/j.imbio.2010.05.003] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2010] [Revised: 05/01/2010] [Accepted: 05/01/2010] [Indexed: 11/30/2022]
Abstract
According to the hygiene hypothesis, triggering the immune system with microbial components during childhood balances the inherent Th2 bias. In contrast, specific immunotherapy involves exposure of the patient to the allergen in order to achieve desensitization to subsequent contact. In a human in vitro allergy model the potential of the TLR2/6 agonist BPPcysMPEG to modulate antigen presenting cells and allergen-specific immune responses was evaluated. Specific immunomodulation via co-administration of the allergen and BPPcysMPEG enhanced expression of co-stimulatory molecules on DC and increased secretion of the proinflammatory cytokine TNF-α. Acting as an adjuvant, BPPcysMPEG elevated allergen-specific immune responses in co-culture with autologous lymphocytes. Although administration of BPPcysMPEG alone enhanced expression of co-stimulatory molecules on DC, proliferation of autologous lymphocytes was not induced. Based on this finding, the potential of BPPcysMPEG to reduce allergic airway inflammation by preventive modulation of the innate immune system via TLR2/6 agonization was investigated in mice. Local administration of BPPcysMPEG altered cellular influx and cell composition in BAL fluid. Furthermore, the Th2-associated cytokines IL-4 and IL-5 were diminished. Allergen-specific restimulation of cells from mediastinal lymph nodes and splenocytes suggested an alteration of immune responses. The treatment with BPPcysMPEG induced a Th1-dominated cytokine milieu in mediastinal lymph nodes, while allergen-specific immune responses in splenocytes were diminished. The co-administration of allergen and BPPcysMPEG reduced cytokine secretion upon restimulation in mediastinal lymph nodes and splenocytes. From these data we conclude that BPPcysMPEG was able to influence the immune system with regard to subsequent allergen contact by TLR2/6 agonization.
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Affiliation(s)
- S Knothe
- Fraunhofer Institute for Toxicology and Experimental Medicine (ITEM), Department of Immunology, Allergology and Immunotoxicology, Hannover, Germany
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Biller H, Windt H, Koch W, Müller M, Jörres RA, Koch A, Framke T, Krug N, Hohlfeld J. Sicherheit und Wirksamkeit der Ozon-Provokation im Fraunhofer Ozon-Provokationsraum. Pneumologie 2010. [DOI: 10.1055/s-0030-1251150] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Hohlfeld J, de Buys Roessingh A, Herzog G, Fabre M, Cherpillod J, Waridel F, Pasche P, Jaques B, Broome M, Despars J, Peter C, Zbinden-Trichet C, Fleury L, Bourgey MJ. [Children born with a cleft: treatment at the CHUV in Lausanne]. Rev Med Suisse 2009; 5:402-408. [PMID: 19331096] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
A cleft can be labial, labial-maxillary, unilateral or bilateral labial-maxillary-palatal, or isolated palatal. A multidisciplinary team includes several specialists who will handle the diverse problems of children born with a cleft. This team will follow the child through each developmental stage and assemble an optimal treatment plan, thus reducing the onus on the family. Depending on the type of cleft and the age of the child, feeding, speech, ORL, dental, orthodontic, esthetic and possibly also psychological problems will be taken care of. This is why cleft treatment starts at the time it is diagnosed, before or after birth, and ends when the child is fully grown. It requires a complete interdisciplinary team and the collaboration with obstetricians and geneticians.
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Affiliation(s)
- J Hohlfeld
- Service de chirurgie pédiatrique, CHUV, 1011 Lausanne.
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Kruse B, Warnecke G, Thissen S, Avsar M, Pabst B, Hohlfeld J, Kaever V, Haverich A, Strüber M. LONG TERM DONOR CELL CHIMERISM INSIDE THE LUNG IS ASSOCIATED WITH A PROLONGED GRAFT SURVIVAL AFTER PULMONARY TRANSPLANTATION. Transplantation 2008. [DOI: 10.1097/01.tp.0000330580.51134.6a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Pletz M, Maus U, Hohlfeld J, Lode H, Welte T. Pneumokokkenimpfung: Konjugatimpfstoff induziert Herdenimmunität und reduziert Antibiotikaresistenz. Dtsch Med Wochenschr 2008; 133:358-62. [DOI: 10.1055/s-2008-1046719] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Schleh C, Veres T, Hoffmann M, Wright J, Braun A, Krug N, Hohlfeld J, Erpenbeck V. SP-D erhöht die Aufnahme von Allergenpartikeln in humane Epithelzellen. Pneumologie 2007. [DOI: 10.1055/s-2007-973304] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Rebei A, Hohlfeld J. Origin of increase of damping in transition metals with rare-earth-metal impurities. Phys Rev Lett 2006; 97:117601. [PMID: 17025930 DOI: 10.1103/physrevlett.97.117601] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/18/2006] [Indexed: 05/12/2023]
Abstract
The damping due to rare-earth-metal impurities in transition metals is discussed in the low concentration limit. It is shown that all established damping mechanisms based on spin-orbit and/or spin-spin interactions cannot explain experimental observations even qualitatively. We introduce a different relaxation channel due to the coupling of the orbital moments of the rare-earth-metal impurities and the conduction p electrons that leads to good agreement with experiment. Using an itinerant picture for the host ions, i.e., write their magnetization in terms of the electronic degrees of freedom, is key to the success of our model.
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Affiliation(s)
- A Rebei
- Seagate Research Center, Pittsburgh, Pennsylvania 15222, USA
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Portier-Marret N, Hohlfeld J, de Buys Roessingh A. P.032 Complete bilateral facial cleft (Tessier 4) with corneal staphyloma: A rare association. J Craniomaxillofac Surg 2006. [DOI: 10.1016/s1010-5182(06)60541-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022] Open
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Portier-Marret N, Hohlfeld J, Lafitte E, de Buys Roessingh A. P.034 Branchio-oculo-facial (BOF) syndrome: A sporadic but severe case. J Craniomaxillofac Surg 2006. [DOI: 10.1016/s1010-5182(06)60543-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022] Open
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Schaumann F, Giehler D, Ghadri J, Reubke-Gothe B, Hohlfeld J, Krug N. Beeinflussung der allergischen Entzündung durch Endotoxin beim Asthma bronchiale. Pneumologie 2006. [DOI: 10.1055/s-2006-933748] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Fehrenbach H, Fehrenbach A, Erpenbeck V, Blöcher S, Prinz R, Krug N, Hohlfeld J. 2D Morphometrie überschätzt große gegenüber kleinen Entzündungszellen in humanen Bronchialbiopsien. Pneumologie 2006. [DOI: 10.1055/s-2006-934008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Schaumann F, Giehler D, Ghadri J, Reubke-Gothe B, Hohlfeld J, Krug N. Beeinflussung der allergischen Entzündung durch Endotoxin beim Asthma bronchiale. Pneumologie 2006. [DOI: 10.1055/s-2005-925513] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Horváth I, Hunt J, Barnes PJ, Alving K, Antczak A, Baraldi E, Becher G, van Beurden WJC, Corradi M, Dekhuijzen R, Dweik RA, Dwyer T, Effros R, Erzurum S, Gaston B, Gessner C, Greening A, Ho LP, Hohlfeld J, Jöbsis Q, Laskowski D, Loukides S, Marlin D, Montuschi P, Olin AC, Redington AE, Reinhold P, van Rensen ELJ, Rubinstein I, Silkoff P, Toren K, Vass G, Vogelberg C, Wirtz H. Exhaled breath condensate: methodological recommendations and unresolved questions. Eur Respir J 2005; 26:523-48. [PMID: 16135737 DOI: 10.1183/09031936.05.00029705] [Citation(s) in RCA: 835] [Impact Index Per Article: 43.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Collection of exhaled breath condensate (EBC) is a noninvasive method for obtaining samples from the lungs. EBC contains large number of mediators including adenosine, ammonia, hydrogen peroxide, isoprostanes, leukotrienes, nitrogen oxides, peptides and cytokines. Concentrations of these mediators are influenced by lung diseases and modulated by therapeutic interventions. Similarly EBC pH also changes in respiratory diseases. The aim of the American Thoracic Society/European Respiratory Society Task Force on EBC was to identify the important methodological issues surrounding EBC collection and assay, to provide recommendations for the measurements and to highlight areas where further research is required. Based on the currently available evidence and the consensus of the expert panel for EBC collection, the following general recommendations were put together for oral sample collection: collect during tidal breathing using a noseclip and a saliva trap; define cooling temperature and collection time (10 min is generally sufficient to obtain 1-2 mL of sample and well tolerated by patients); use inert material for condenser; do not use resistor and do not use filter between the subject and the condenser. These are only general recommendations and certain circumstances may dictate variation from them. Important areas for future research involve: ascertaining mechanisms and site of exhaled breath condensate particle formation; determination of dilution markers; improving reproducibility; employment of EBC in longitudinal studies; and determining the utility of exhaled breath condensate measures for the management of individual patients. These studies are required before recommending this technique for use in clinical practice.
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Affiliation(s)
- I Horváth
- National Korányi Institute for Pulmonology, Dept of Pathophysiology, Budapest PO Box 1, Piheno u. 1. H-1529, Hungary.
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Schmiedl A, Hohlfeld J, Ochs M, Stemme S, Bargsten G, Tschernig T. Veränderungen des pulmonalen Surfactant im Asthma-Modell der Brown Norway Ratte. Pneumologie 2005. [DOI: 10.1055/s-2005-862718] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Fanghänel E, Hänsel R, Hohlfeld J. 1,2,3-Triazabutadiene. V. Untersuchungen zum Mechanismus der thermischen cis-trans-Isomerisierung von substituierten 1-Aryl-3-[methylbenzthiazolinyliden-(2)]-triazenen. ACTA ACUST UNITED AC 2004. [DOI: 10.1002/prac.19773190318] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Fanghänel E, Hohlfeld J. 1, 2, 3-Triazabutadiene. XIV. Untersuchungen zur sauren Spaltung Z-E-isomerer 1-Aryl-3-[3-methylbenzthiazolinyliden-(2)]- und 1-Aryl-3-[1,3-dimethylbenzimidazolinyliden-(2)]-triazene. ACTA ACUST UNITED AC 2004. [DOI: 10.1002/prac.19813230210] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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39
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Fanghänel E, Hohlfeld J. 1,2,3-Triazabutadiene. XIII. UV-vis-spektroskopische Untersuchungen zur Protonierung Z-E-isomerer 1-Aryl-3-[3-methylbenzthiazolinyliden-(2)]- und 1-Aryl-3-[1,3-dimethylbenzimidazolinyliden-(2)]-triazene. ACTA ACUST UNITED AC 2004. [DOI: 10.1002/prac.19813230209] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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40
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Schaberg T, Hauer B, Haas WH, Hohlfeld J, Kropp R, Loddenkemper R, Loytved G, Magdorf K, Rieder HL, Sagebiel D. [Latent tuberculosis infection: recommendations for preventive therapy in adults in Germany]. Pneumologie 2004; 58:255-70. [PMID: 15098162 DOI: 10.1055/s-2003-812534] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
The immunologic mechanisms of latent tuberculosis (TB) infection are complex and hitherto not completely understood. The lifelong risk of an immunocompetent individual of developing active TB after infection with M. tuberculosis is 5-10 % and highest during the first two years after infection. Various factors may considerably increase the risk of developing active TB, e. g., immunosuppressive disease or immunosuppressive medication. However, the development of active TB may be avoided by preventive chemotherapy, the therapy of choice being isoniazid over a 9-month period. Alternative treatment regimens may be indicated in special cases, but it must be borne in mind that the efficacy of these regimens has not been studied sufficiently while they seem to be less well tolerated than isoniazid monotherapy. The tuberculin skin test is still the only sufficiently documented method to detect latent infection with M. tuberculosis which is also suitable for routine application. This test today should be performed exclusively as described by Mendel and Mantoux. Its sensitivity and specificity depend on the prevalence of tuberculosis infection. It should therefore be restricted to individuals at increased risk of latent TB infection. When interpreting the tuberculin skin test, it is necessary to know whether an individual belongs to one of the defined risk groups or has an elevated risk of developing active TB. Among the risk groups are individuals who may have been infected recently with M. tuberculosis (contacts of contagious TB patients) or in whom other factors increase their risk of developing active TB. The indication for chemotherapy for latent TB infection must be based on a careful individual risk-benefit analysis and, besides patient compliance, requires full information of the patient and careful monitoring during therapy. Before initiating treatment, active TB must always be excluded by the proven methods.
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Bechtold IH, Gómez SL, Bonvent JJ, Oliveira EA, Hohlfeld J, Rasing T. Surface-induced orientational phase transition in a lyotropic liquid crystal observed by nonlinear optical techniques. Phys Rev E Stat Nonlin Soft Matter Phys 2004; 69:061707. [PMID: 15244598 DOI: 10.1103/physreve.69.061707] [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: 09/04/2003] [Indexed: 05/24/2023]
Abstract
We have observed a phase transition from a uniaxial to a biaxial nematic phase in a lyotropic liquid crystal as a function of decreasing film thickness. The results, obtained by optical second-harmonic generation experiments in a wedged cell geometry, are supported by additional Z -scan measurements and can be interpreted by wall-induced ordering effects.
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Affiliation(s)
- I H Bechtold
- NSRIM, University of Nijmegen, Toernooiveld 1, 6525 ED Nijmegen, The Netherlands
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Krug N, Geldmacher H, Nguyen D, Larbig M, LaVallee N, Hohlfeld J, Petzold U, Hermann R. Dose-ranging study of loteprednol etabonate nasal spray (LE) as a once-daily treatment for allergic rhinitis in an Environmental Exposure Unit (EEU). J Allergy Clin Immunol 2003. [DOI: 10.1016/s0091-6749(03)80209-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Kimel AV, Pisarev RV, Hohlfeld J, Rasing T. Ultrafast quenching of the antiferromagnetic order in FeBO3: direct optical probing of the phonon-magnon coupling. Phys Rev Lett 2002; 89:287401. [PMID: 12513178 DOI: 10.1103/physrevlett.89.287401] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/21/2002] [Indexed: 05/24/2023]
Abstract
The dynamics of the optically induced phase transition from the antiferromagnetic to the paramagnetic state in FeBO3 is observed using a pump-probe magneto-optical Faraday technique employing 100 fs laser pulses. At the pump energy of 1.55 eV phonon-assisted transitions dominate in the absorption of light and ultrafast heating of the lattice occurs. The quenching of the magnetic order is caused by an increase of the magnon temperature due to energy transfer from the heated lattice. The heating time of the magnon system is around 700 ps, which is a factor of 20 faster than previously reported phonon-magnon interaction times.
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Affiliation(s)
- A V Kimel
- A. F. Ioffe Physical Technical Institute, Russian Academy of Sciences, St. Petersburg 194021, Russia
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Gerrits T, Van Den Berg HAM, Hohlfeld J, Bär L, Rasing T. Ultrafast precessional magnetization reversal by picosecond magnetic field pulse shaping. Nature 2002; 418:509-12. [PMID: 12152072 DOI: 10.1038/nature00905] [Citation(s) in RCA: 389] [Impact Index Per Article: 17.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Since the invention of the first magnetic memory disk in 1954, much effort has been put into enhancing the speed, bit density and reliability of magnetic memory devices. In the case of magnetic random access memory (MRAM) devices, fast coherent magnetization rotation by precession of the entire memory cell is desired, because reversal by domain-wall motion is much too slow. In principle, the fundamental limit of the switching speed via precession is given by half of the precession period. However, under-critically damped systems exhibit severe ringing and simulations show that, as a consequence, undesired back-switching of magnetic elements of an MRAM can easily be initiated by subsequent write pulses, threatening data integrity. We present a method to reverse the magnetization in under-critically damped systems by coherent rotation of the magnetization while avoiding any ringing. This is achieved by applying specifically shaped magnetic field pulses that match the intrinsic properties of the magnetic elements. We demonstrate, by probing all three magnetization components, that reliable precessional reversal in lithographically structured micrometre-sized elliptical permalloy elements is possible at switching times of about 200 ps, which is ten times faster than the natural damping time constant.
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Affiliation(s)
- Th Gerrits
- Research Institute for Materials, University of Nijmegen, Toernooiveld 1, 6525 ED Nijmegen, The Netherlands
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Gerrits T, Berg HAMVD, Hohlfeld J, Gielkens O, Veenstra KJ, Bal K, Rasing T. Precession dynamics in NiFe thin films, induced by short magnetic in-plane field pulses generated by a photoconductive switch. ACTA ACUST UNITED AC 2001. [DOI: 10.3379/jmsjmag.25.192] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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Bernhard W, Rau G, Gebert A, Hohlfeld J, Postle A, Freihorst J. Surfactant in the tubular bird lung in comparison to the alveolar mammalian lung — similarities and dissimilarities. Comp Biochem Physiol B Biochem Mol Biol 2000. [DOI: 10.1016/s0305-0491(00)80021-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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Enhorning G, Hohlfeld J, Krug N, Lema G, Welliver RC. Surfactant function affected by airway inflammation and cooling: possible impact on exercise-induced asthma. Eur Respir J 2000; 15:532-8. [PMID: 10759448 DOI: 10.1034/j.1399-3003.2000.15.17.x] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Pulmonary surfactant maintains patency of narrow conducting airways. An inflammation, with a leakage of plasma proteins into the airway lumen, causes surfactant to lose some of this ability. Will a lowering of temperature aggravate the deteriorating effect of an inflammation? Calf lung surfactant extract (CLSE) with proteins added was studied with a capillary surfactometer (CS) at temperatures of 25-42 degrees C. BALB/c mice were infected with respiratory syncytial virus (RSV). Six days later the lungs were lavaged and the surfactant in the lavage fluid was studied with the CS at temperatures of 25-42 degrees C. Lavage fluid from allergen challenged asthmatics was examined for its content of surfactant inhibitors at reduced temperatures. It was shown that CLSE with proteins gradually lost its ability to maintain patency as the temperature was lowered. Lavage fluid from the RSV infected mice showed a similar dysfunction at low temperatures. Lavage fluid from the airways of human asthmatics, when challenged with antigen but not with saline, contained agents inhibiting surface activity, particularly at reduced temperatures. Airway inflammation causes surfactant to lose its ability to maintain patency, particularly as the temperature is reduced. That might be a reason for the increased airway resistance observed in asthma patients hyperventilating in cold weather.
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Affiliation(s)
- G Enhorning
- Dept of Gynecology/Obstetrics, State University of New York at Buffalo, USA
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Miyoshi S, Demertzis S, Eckstein F, Hohlfeld J, Schaefers HJ. Chest size matching in single and double lung transplantation. Jpn J Thorac Cardiovasc Surg 1999; 47:163-70. [PMID: 10358947 DOI: 10.1007/bf03217963] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
We applied predicted vital capacity to chest size matching between donor and recipient in lung transplantation to 15 single-lung transplant recipients with pulmonary fibrosis and to 20 double-lung transplant recipients with emphysema or non-emphysema. The predicted vital capacity of the donor was significantly correlated with the predicted vital capacity of the recipient both in double-lung transplantation (r = 0.79, p = 0.001) and single-lung transplantation (r = 0.71, p = 0.003). In double-lung transplantation, the post-transplant vital capacity was correlated with the predicted vital capacity of the recipient (r = 0.74, p = 0.002). Emphysema patients and non-emphysema patients contributed equally to this correlation. In left single lung transplantation, there was a weak correlation between the post-transplant vital capacity and the predicted vital capacity of the donor in the allograft (r = 0.57, p = 0.1095). In right single lung transplantation, the post-transplant vital capacity of the allograft tended to be correlated with the predicted vital capacity of recipient (r = 0.77, p = 0.0735). We concluded that donors were actually selected based on the comparison of predicted vital capacity between donor and recipient. In double-lung transplantation, the post-transplant vital capacity was limited by the recipient's normal thoracic volume and was not influenced by underlying pulmonary disease. In single-lung transplantation with pulmonary fibrosis, the allograft transplanted in the left chest could expand to its own size, and the allograft transplanted in the right chest could expand to the recipient's normal thoracic volume as in double-lung transplantation.
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Affiliation(s)
- S Miyoshi
- First Department of Surgery, Osaka University Medical School, Japan
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Abstract
Exogenous surfactant treatment inhibits antigen-induced airway obstruction in sensitized guinea-pigs. Aerosolized surfactant also improves respiratory function in asthmatic patients. The aim of the present study was to determine whether aerosolized surfactant inhibits nonallergic airway obstruction induced by acetylcholine. Anaesthetized Wistar rats were treated by aerosol with the beta2-adrenoceptor agonist terbutaline, surfactant (Alveofact), a surfactant-terbutaline combination, or vehicle (control). Animals were then challenged by aerosolized acetylcholine to elicit receptor-mediated airway obstruction. A second group of animals was challenged with intravenous acetylcholine. Respiratory function variables were measured by body plethysmography before and after treatment, and after the acetylcholine challenge. Baseline lung function values before and after treatment were similar in all groups. Acetylcholine challenge by aerosol increased lung resistance by 64% in control animals. Pretreatment with terbutaline and surfactant significantly limited the increase of lung resistance to +36 and +34%, respectively. Simultaneous aerosolization of surfactant and terbutaline also inhibited airway obstruction but their effects were not additive. By contrast, terbutaline treatment inhibited the effects of intravenous acetylcholine, but surfactant did not. In conclusion, we suggest that surfactant aerosol may prevent acetylcholine and other pharmacological agents from reaching the airway smooth muscle from the airway lumen but not via the bloodstream.
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Affiliation(s)
- J Hohlfeld
- Fraunhofer Institute of Toxicology and Aerosol Research, and Dept of Respiratory Medicine, Hannover Medical School, Germany
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