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Tehseen I, Haq TU, Ilahi I, Khan AA, Attaullah M, Zamani GY, Zaman S, Ismail I. Antidiabetic and hepato-renal protective effects of medicinal plants in STZ induced diabetic rats. BRAZ J BIOL 2024; 84:e260189. [DOI: 10.1590/1519-6984.260189] [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] [Received: 01/19/2022] [Accepted: 03/15/2022] [Indexed: 11/21/2022] Open
Abstract
Abstract The antidiabetic and hepato-renal protective effects of Citrullus colocynthis and Momordica charantia ethanol extracts were investigated in streptozotocin (STZ) induced diabetic male albino rats. Diabetic rats were treated with C. colocynthis, M. charantia or C. colocynthis + M. charantia mixed extract at a dose of 250 mg /kg body weight per oral per day for 21 days. The mean body weight of all the diabetic rat groups on day 1 of treatment (day 10 of diabetes) was significantly lower than the normal control rat group (P<0.05). The blood glucose level of all the diabetic rat groups on day 1 of treatment (day 10 of diabetes) was significantly (P<0.05) higher (> 200 mg/dl) than the normal control rat group (95.5 ± 2.7). At the end of treatment (day 21), the diabetic rats treated with plant extracts showed significant increase (P<0.05) in body weight and significant (P<0.05) reduction in blood glucose level when compared to diabetic control animals. Significant increase (< 0.05) was observed in the serum bilirubin, alanine transaminase (ALT), aspartate transaminase (AST), alkaline phosphatase (ALP), urea and creatinine levels of diabetic control rat group. The serum levels of these liver and kidney-related parameters of diabetic rats treated with plant extract were significantly lower when compared to diabetic control rat group (p < 0.05). Photomicrographs of liver and kidney microsections from diabetic rats treated with these plant extracts showed amelioration in the hepato-renal histoarchitectures. It was concluded that the C. colocynthis and M. charantia methanol extracts are antidiabetic and hepato-renal protective in STZ induced diabetic male rats. Treatment of the diabetic rats with C. colocynthis + M. charantia mixed extract is more effective in the amelioration of diabetes and hepato-renal injuries in STZ induced diabetic male rats.
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Affiliation(s)
| | | | - I. Ilahi
- University of Malakand, Pakistan
| | | | | | | | - S. Zaman
- University of Malakand, Pakistan
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Žitnik M, Hrast M, Mihelič A, Bučar K, Turnšek J, Püttner R, Goldsztejn G, Marchenko T, Guillemin R, Journel L, Travnikova O, Ismail I, Piancastelli MN, Simon M, Ceolin D, Kavčič M. Auger Shake-Up Assisted Electron Recapture. Phys Rev Lett 2023; 131:203001. [PMID: 38039460 DOI: 10.1103/physrevlett.131.203001] [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: 05/17/2023] [Revised: 10/06/2023] [Accepted: 10/16/2023] [Indexed: 12/03/2023]
Abstract
The presence of doubly excited states (DESs) above the core-hole ionization threshold nontrivially modulates the x-ray absorption because the participator Auger decay couples DESs to the underlying low-energy core-hole continuum. We show that coupling also affects the high-energy continuum populated by the spectator Auger decay of DESs. For the K-L_{23}^{2} Auger decay of the 1s^{-1}3p^{-1}4s^{2}^{1}P state in argon, the competing nonresonant path is assigned to the recapture of the 1s photoelectron caused by emission of the fast electron from the shake-up K-L_{23}^{2} decay of the 1s^{-1} ion.
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Affiliation(s)
- M Žitnik
- Jožef Stefan Institute, Jamova cesta 39, SI-1000 Ljubljana, Slovenia
- Faculty of Mathematics and Physics, University of Ljubljana, Jadranska 31, SI-1000 Ljubljana, Slovenia
| | - M Hrast
- Jožef Stefan Institute, Jamova cesta 39, SI-1000 Ljubljana, Slovenia
| | - A Mihelič
- Jožef Stefan Institute, Jamova cesta 39, SI-1000 Ljubljana, Slovenia
- Faculty of Mathematics and Physics, University of Ljubljana, Jadranska 31, SI-1000 Ljubljana, Slovenia
| | - K Bučar
- Jožef Stefan Institute, Jamova cesta 39, SI-1000 Ljubljana, Slovenia
- Faculty of Mathematics and Physics, University of Ljubljana, Jadranska 31, SI-1000 Ljubljana, Slovenia
| | - J Turnšek
- Jožef Stefan Institute, Jamova cesta 39, SI-1000 Ljubljana, Slovenia
- Faculty of Mathematics and Physics, University of Ljubljana, Jadranska 31, SI-1000 Ljubljana, Slovenia
| | - R Püttner
- Fachbereich Physik, Freie Universität Berlin, Arnimallee 14, D-14195 Berlin-Dahlem, Germany
| | - G Goldsztejn
- Sorbonne Université, UPMC Univ Paris 06, UMR 7614, LCPMR, 75005 Paris, France
| | - T Marchenko
- Sorbonne Université, UPMC Univ Paris 06, UMR 7614, LCPMR, 75005 Paris, France
| | - R Guillemin
- Sorbonne Université, UPMC Univ Paris 06, UMR 7614, LCPMR, 75005 Paris, France
| | - L Journel
- Sorbonne Université, UPMC Univ Paris 06, UMR 7614, LCPMR, 75005 Paris, France
| | - O Travnikova
- Sorbonne Université, UPMC Univ Paris 06, UMR 7614, LCPMR, 75005 Paris, France
| | - I Ismail
- Sorbonne Université, UPMC Univ Paris 06, UMR 7614, LCPMR, 75005 Paris, France
| | - M N Piancastelli
- Sorbonne Université, UPMC Univ Paris 06, UMR 7614, LCPMR, 75005 Paris, France
| | - M Simon
- Sorbonne Université, UPMC Univ Paris 06, UMR 7614, LCPMR, 75005 Paris, France
| | - D Ceolin
- Synchrotron SOLEIL, L'Orme des Merisiers, Saint Aubin, BP 48, F-91192 Gif-sur-Yvette Cedex, France
| | - M Kavčič
- Jožef Stefan Institute, Jamova cesta 39, SI-1000 Ljubljana, Slovenia
- Faculty of Mathematics and Physics, University of Ljubljana, Jadranska 31, SI-1000 Ljubljana, Slovenia
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Ismail I, Venter M, Ismail S, Ally N. Ocular manifestations of HIV infection at Chris Hani Baragwanath Academic Hospital, Johannesburg, South Africa. S Afr Med J 2023; 113:20-24. [PMID: 37881908 DOI: 10.7196/samj.2023.v113i10.950] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2023] [Indexed: 10/27/2023] Open
Abstract
BACKGROUND The pattern of HIV-associated eye disease has changed with ongoing advancements in highly active antiretroviral therapy (HAART). HIV-infected individuals now live longer, enabling us to observe the long-term effects of HIV and HAART on the eye. There are few recent studies on HIV-related ocular disease in sub-Saharan Africa. OBJECTIVES To describe the ocular manifestations of HIV in patients attending the Nthabiseng HIV clinic at Chris Hani Baragwanath Academic Hospital, Johannesburg, South Africa. METHODS A cross-sectional study was conducted in 2021 and 2022 using convenience sampling of patients at the HIV clinic. The participants' clinical history was taken, their files were reviewed, and they underwent ocular examination. Correlation between eyes was managed by taking disease in one eye as the presence of disease in the participant. Descriptive statistics were used to summarise participant characteristics. Univariate and multivariate logistic regression models were used to assess the odds ratio (OR) of developing HIV-associated ocular diseases, and a p-value of <0.05 was used to define statistical significance. RESULTS There were 182 participants (139 females and 43 males), with a mean (standard deviation) age of 48.9 (10.6) years. The most common anterior segment diagnoses were conjunctival microangiopathy (34.6%), pinguecula (31.3%) and cataracts (30.2%), while the most common posterior segment finding was peripheral retinal scarring with features in keeping of previous cytomegalovirus retinitis (24.2%). Notably, only 1.1% of patients had HIV retinopathy. A CD4 count <200 cells/μL showed an increased OR for cataracts (OR 4.24; p=0.003) and any anterior segment diagnoses (OR 10.05; p=0.029), while a CD4 count ≥200 cells/μL showed an increased risk of conjunctival microangiopathy (OR 2.14; p=0.017). CONCLUSION With the advent of HAART, ocular manifestations of HIV are changing and the incidence of severe ocular opportunistic infections and HIV retinopathy has decreased precipitously. Although this study has shown that patients with a CD4 count <200 cells/μL are at increased risk of developing anterior ocular manifestations of HIV, including cataracts, these diseases are relatively innocuous or easily treatable. Routine ocular screening of HIV patients seems to be substantially less important now than it was in the pre-HAART era.
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Affiliation(s)
- I Ismail
- Department of Internal Medicine, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, South Africa.
| | - M Venter
- Division of Infectious Diseases, Department of Internal Medicine, Chris Hani Baragwanath Academic Hospital and Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, South Africa.
| | - S Ismail
- Consultant ophthalmologist, Johannesburg, South Africa.
| | - N Ally
- Manchester Royal Eye Hospital, Manchester, UK; Division of Ophthalmology, Department of Neurosciences, St John Eye Hospital, Chris Hani Baragwanath Academic Hospital and Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, South Africa.
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Guillemin R, Inhester L, Ilchen M, Mazza T, Boll R, Weber T, Eckart S, Grychtol P, Rennhack N, Marchenko T, Velasquez N, Travnikova O, Ismail I, Niskanen J, Kukk E, Trinter F, Gisselbrecht M, Feifel R, Sansone G, Rolles D, Martins M, Meyer M, Simon M, Santra R, Pfeifer T, Jahnke T, Piancastelli MN. Isotope effects in dynamics of water isotopologues induced by core ionization at an x-ray free-electron laser. Struct Dyn 2023; 10:054302. [PMID: 37799711 PMCID: PMC10550338 DOI: 10.1063/4.0000197] [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] [Subscribe] [Scholar Register] [Received: 06/01/2023] [Accepted: 09/05/2023] [Indexed: 10/07/2023]
Abstract
Dynamical response of water exposed to x-rays is of utmost importance in a wealth of science areas. We exposed isolated water isotopologues to short x-ray pulses from a free-electron laser and detected momenta of all produced ions in coincidence. By combining experimental results and theoretical modeling, we identify significant structural dynamics with characteristic isotope effects in H2O2+, D2O2+, and HDO2+, such as asymmetric bond elongation and bond-angle opening, leading to two-body or three-body fragmentation on a timescale of a few femtoseconds. A method to disentangle the sequences of events taking place upon the consecutive absorption of two x-ray photons is described. The obtained deep look into structural properties and dynamics of dissociating water isotopologues provides essential insights into the underlying mechanisms.
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Affiliation(s)
- R. Guillemin
- Sorbonne Université, CNRS, Laboratoire de Chimie Physique-Matière et Rayonnement, LCPMR, 75005 Paris, France
| | - L. Inhester
- Center for Free-Electron Laser Science CFEL, Deutsches Elektronen-Synchrotron DESY, Notkestr. 85, 22607 Hamburg, Germany
| | | | - T. Mazza
- European XFEL, 22869 Schenefeld, Germany
| | - R. Boll
- European XFEL, 22869 Schenefeld, Germany
| | - Th. Weber
- Lawrence Berkeley National Laboratory, Chemical Sciences, Berkeley, California 94720, USA
| | - S. Eckart
- Institut für Kernphysik, Goethe-Universität, 60438 Frankfurt am Main, Germany
| | | | | | - T. Marchenko
- Sorbonne Université, CNRS, Laboratoire de Chimie Physique-Matière et Rayonnement, LCPMR, 75005 Paris, France
| | - N. Velasquez
- Sorbonne Université, CNRS, Laboratoire de Chimie Physique-Matière et Rayonnement, LCPMR, 75005 Paris, France
| | - O. Travnikova
- Sorbonne Université, CNRS, Laboratoire de Chimie Physique-Matière et Rayonnement, LCPMR, 75005 Paris, France
| | - I. Ismail
- Sorbonne Université, CNRS, Laboratoire de Chimie Physique-Matière et Rayonnement, LCPMR, 75005 Paris, France
| | - J. Niskanen
- Department of Physics and Astronomy, University of Turku, 20014 Turku, Finland
| | - E. Kukk
- Department of Physics and Astronomy, University of Turku, 20014 Turku, Finland
| | | | | | - R. Feifel
- Department of Physics, University of Gothenburg, 412 96 Gothenburg, Sweden
| | - G. Sansone
- Physikalisches Institut, Universität Freiburg, 79104 Freiburg, Germany
| | - D. Rolles
- J. R. Macdonald Laboratory, Department of Physics, Kansas State University, Manhattan, Kansas 66506, USA
| | - M. Martins
- Institut für Experimentalphysik, Universität Hamburg, 22761 Hamburg, Germany
| | - M. Meyer
- European XFEL, 22869 Schenefeld, Germany
| | - M. Simon
- Sorbonne Université, CNRS, Laboratoire de Chimie Physique-Matière et Rayonnement, LCPMR, 75005 Paris, France
| | | | - T. Pfeifer
- Max-Planck-Institut für Kernphysik, 69117 Heidelberg, Germany
| | - T. Jahnke
- Max-Planck-Institut für Kernphysik, 69117 Heidelberg, Germany
| | - M. N. Piancastelli
- Sorbonne Université, CNRS, Laboratoire de Chimie Physique-Matière et Rayonnement, LCPMR, 75005 Paris, France
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Kho SS, Lim KC, Muhammad NA, Nasaruddin MZ, Ismail I, Daut UM, Abdul Rahaman JA. Clinical and radiological outcomes of SARS-CoV-2 related organising pneumonia in COVID-19 survivors. Med J Malaysia 2023; 78:131-138. [PMID: 36988520] [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: 04/19/2023]
Abstract
INTRODUCTION COVID-19 patients frequently demonstrate radiological organising pneumonia (OP) pattern. The longterm outcome and treatment options for this group of patients remain uncertain. We aim to describe the clinical and radiological outcomes of patients with COVID-19-related OP and identify possible clinical factors associated with inferior radiological outcome. MATERIALS AND METHODS Post-COVID-19 clinic attendees, consisting of post-COVID-19 patients discharged from major hospitals in the state of Selangor during the third pandemic wave of COVID-19 in Malaysia, were enrolled in this retrospective study for 6 months. Physician-scored Modified Medical Research Council (mMRC), patient self-reported quality of life (EQ-VAS) score and follow-up CT scan were evaluated. RESULTS Our cohort comprised 131 patients, with a median age of 52 (IQR 39-60) years and median BMI of 29.40 (IQR 25.59-34.72). Majority (72.5%) had co-morbidities, and 97.7% had severe disease requiring supplementary oxygen support during the acute COVID-19 episode. 56.5% required intensive care; among which one-third were invasively ventilated. Median equivalent dose of methylprednisolone prescribed was 2.60 (IQR 1.29-5.18) mg/kg during admission, while the median prednisolone dose upon discharge was 0.64 (IQR 0.51-0.78) mg/kg. It was tapered over a median of 8.0 (IQR 5.8-9.0) weeks. Upon follow-up at 11 (IQR 8-15) weeks, one-third of patients remained symptomatic, with cough, fatigue and dyspnoea being the most reported symptoms. mMRC and EQ-VAS scores improved significantly (p<0.001) during follow-up. Repeat CT scans were done in 59.5% of patients, with 94.8% of them demonstrating improvement. In fact, 51.7% had complete radiological resolution. Intensive care admission and mechanical ventilation are among the factors which were associated with poorer radiological outcomes, p<0.05. CONCLUSION Approximately one-third of patients with SARSCoV- 2-related OP remained symptomatic at 3 months of follow-up. Majority demonstrated favourable radiological outcomes at 5-month reassessment, except those who required intensive care unit admission and mechanical ventilation.
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Affiliation(s)
- S S Kho
- Serdang Hospital, Department of Pulmonology, Selangor, Malaysia.
| | - K C Lim
- Serdang Hospital, Department of Medicine, Selangor, Division of Infectious Diseases, Malaysia
| | - N A Muhammad
- Serdang Hospital, Department of Pulmonology, Selangor, Malaysia
| | - M Z Nasaruddin
- Serdang Hospital, Department of Pulmonology, Selangor, Malaysia
| | - I Ismail
- Serdang Hospital, Department of Radiology, Selangor, Malaysia
| | - U M Daut
- Serdang Hospital, Department of Pulmonology, Selangor, Malaysia
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Huart L, Fournier M, Dupuy R, Vacheresse R, Reinhardt M, Cubaynes D, Céolin D, Hervé du Penhoat MA, Renault JP, Guigner JM, Kumar A, Lutet-Toti B, Bozek J, Ismail I, Journel L, Lablanquie P, Penent F, Nicolas C, Palaudoux J. First (e,e) coincidence measurements on solvated sodium benzoate in water using a magnetic bottle time-of-flight spectrometer. Phys Chem Chem Phys 2023; 25:11085-11092. [PMID: 36484473 DOI: 10.1039/d2cp02982k] [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: 12/12/2022]
Abstract
Sodium benzoate molecules solvated in water are studied using coincidence electron spectroscopy coupled with a liquid microjet device.
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Affiliation(s)
- L. Huart
- Synchrotron Soleil, 91192 Saint Aubin, France
- Université Paris-Saclay, CEA, CNRS, NIMBE, CEA Saclay, 91191 Gif-sur-Yvette, France
- Institut de Minéralogie, de Physique des Matériaux et de Cosmochimie, Sorbonne Université, UMR CNRS 7590, MHNH, 75252 Paris, France
| | - M. Fournier
- Synchrotron Soleil, 91192 Saint Aubin, France
- Sorbonne Université, CNRS, Laboratoire de Chimie Physique – Matière et Rayonnement, LCP-MR, F-75005 Paris Cedex 05, France
| | - R. Dupuy
- Sorbonne Université, CNRS, Laboratoire de Chimie Physique – Matière et Rayonnement, LCP-MR, F-75005 Paris Cedex 05, France
- Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, 14195 Berlin, Germany
| | - R. Vacheresse
- Sorbonne Université, CNRS, Laboratoire de Chimie Physique – Matière et Rayonnement, LCP-MR, F-75005 Paris Cedex 05, France
| | - M. Reinhardt
- Nano and Molecular Systems Research Unit, University of Oulu, PO Box 3000, FI-90014, Finland
| | - D. Cubaynes
- ISMO, CNRS UMR 8214, Université Paris Sud, bâtiment 350, F-91405, Orsay, France
| | - D. Céolin
- Sorbonne Université, CNRS, Laboratoire de Chimie Physique – Matière et Rayonnement, LCP-MR, F-75005 Paris Cedex 05, France
| | - M. A. Hervé du Penhoat
- Institut de Minéralogie, de Physique des Matériaux et de Cosmochimie, Sorbonne Université, UMR CNRS 7590, MHNH, 75252 Paris, France
| | - J. P. Renault
- Université Paris-Saclay, CEA, CNRS, NIMBE, CEA Saclay, 91191 Gif-sur-Yvette, France
| | - J.-M. Guigner
- Institut de Minéralogie, de Physique des Matériaux et de Cosmochimie, Sorbonne Université, UMR CNRS 7590, MHNH, 75252 Paris, France
| | - A. Kumar
- Synchrotron Soleil, 91192 Saint Aubin, France
| | - B. Lutet-Toti
- Sorbonne Université, CNRS, Laboratoire de Chimie Physique – Matière et Rayonnement, LCP-MR, F-75005 Paris Cedex 05, France
| | - J. Bozek
- Synchrotron Soleil, 91192 Saint Aubin, France
| | - I. Ismail
- Sorbonne Université, CNRS, Laboratoire de Chimie Physique – Matière et Rayonnement, LCP-MR, F-75005 Paris Cedex 05, France
| | - L. Journel
- Sorbonne Université, CNRS, Laboratoire de Chimie Physique – Matière et Rayonnement, LCP-MR, F-75005 Paris Cedex 05, France
| | - P. Lablanquie
- Sorbonne Université, CNRS, Laboratoire de Chimie Physique – Matière et Rayonnement, LCP-MR, F-75005 Paris Cedex 05, France
| | - F. Penent
- Sorbonne Université, CNRS, Laboratoire de Chimie Physique – Matière et Rayonnement, LCP-MR, F-75005 Paris Cedex 05, France
| | - C. Nicolas
- Synchrotron Soleil, 91192 Saint Aubin, France
| | - J. Palaudoux
- Sorbonne Université, CNRS, Laboratoire de Chimie Physique – Matière et Rayonnement, LCP-MR, F-75005 Paris Cedex 05, France
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Salzmann S, Laferton J, Shedden-Mora M, Horn N, Gärtner L, Schröder L, Rau J, Schade-Brittinger C, Murmann K, Rastan A, Andrási T, Böning A, Salzmann-Djufri M, Löwe B, Brickwedel J, Albus C, Wahlers T, Hamm A, Hilker L, Albert W, Zimmermann T, Ismail I, Strauß B, Doenst T, Schedlowski M, Moosdorf R, Rief W. Pre-surgery Optimization of Patients’ Expectations to Improve Outcome in Heart Surgery: Study Protocol of the Randomized Controlled Multicenter PSY-HEART-II Trial. Thorac Cardiovasc Surg 2023. [DOI: 10.1055/s-0043-1761773] [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: 03/22/2023]
Affiliation(s)
- S. Salzmann
- Division of Clinical Psychology and Psychotherapy, Philipps University of Marburg, Marburg, Deutschland
| | - J. Laferton
- Department of Medicine, Health and Medical University, Potsdam, Deutschland
| | - M. Shedden-Mora
- Department of Psychology, Medical School Hamburg, Hamburg, Deutschland
| | - N. Horn
- Division of Clinical Psychology and Psychotherapy, Philipps University of Marburg, Marburg, Deutschland
| | - L. Gärtner
- Division of Clinical Psychology and Psychotherapy, Philipps University of Marburg, Marburg, Deutschland
| | - L. Schröder
- Division of Clinical Psychology and Psychotherapy, Philipps University of Marburg, Marburg, Deutschland
| | - J. Rau
- Coordination Center for Clinical Trials (KKS), University of Marburg, Marburg, Deutschland
| | - C. Schade-Brittinger
- Coordination Center for Clinical Trials (KKS), University of Marburg, Marburg, Deutschland
| | - K. Murmann
- Coordination Center for Clinical Trials (KKS), University of Marburg, Marburg, Deutschland
| | - A. Rastan
- Department for Cardiovascular Surgery, Heart Center, Philipps University of Marburg, Marburg, Deutschland
| | - T. Andrási
- Department for Cardiovascular Surgery, Heart Center, Philipps University of Marburg, Marburg, Deutschland
| | - A. Böning
- Department of Cardiovascular Surgery, University Hospital Giessen, Giessen, Deutschland
| | - M. Salzmann-Djufri
- Department of Cardiovascular Surgery, University Hospital Giessen, Giessen, Deutschland
| | - B. Löwe
- Department of Psychosomatic Medicine and Psychotherapy, University Medical Center Hamburg, Hamburg, Deutschland
| | - J. Brickwedel
- Department of Cardiovascular Surgery, University Heart and Vascular Center Hamburg, Hamburg, Deutschland
| | - C. Albus
- Department of Psychosomatics and Psychotherapy, Medical Faculty and University Hospital, Cologne, Deutschland
| | - T. Wahlers
- Department of Cardiothoracic Surgery, University Hospital of Cologne, Cologne, Deutschland
| | - A. Hamm
- Department of Physiological and Clinical Psychology/ Psychotherapy, University of Greifswald, Greifswald, Deutschland
| | - L. Hilker
- Department of Cardiovascular Surgery, Clinic Karlsburg, Heart and Diabetes Center, Karlsburg, Deutschland
| | - W. Albert
- Psychosomatics, German Heart Center Berlin, Berlin, Deutschland
| | - T. Zimmermann
- Department of Psychosomatic Medicine and Psychotherapy, Hannover Medical School, Hanover, Deutschland
| | - I. Ismail
- Division of Cardiac, Thoracic, Transplantation and Vascular Surgery, Hannover Medical School, Hanover, Deutschland
| | - B. Strauß
- Institute of Psychosocial Medicine, Psychotherapy, and Psychooncology, University Hospital Jena, Jena, Deutschland
| | - T. Doenst
- Jena University Hospital, Friedrich-Schiller-University of Jena, Jena, Deutschland
| | - M. Schedlowski
- Institute of Medical Psychology and Behavioral Immunobiology, University Clinic Essen, Essen, Deutschland
| | - R. Moosdorf
- Department for Cardiovascular Surgery, Heart Center, Philipps University of Marburg, Marburg, Deutschland
| | - W. Rief
- Division of Clinical Psychology and Psychotherapy, Philipps University of Marburg, Marburg, Deutschland
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Hussin F, Rus MM, Shahril N, Leong C, Ismail I, Khalid K, Chidambaran S. Multidrug-resistant Enterococcus faecalis native valve endocarditis – a case report. Int J Cardiol 2022. [DOI: 10.1016/j.ijcard.2022.10.117] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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Abstract
Graph-based descriptors, such as bond-order matrices and adjacency matrices, offer a simple and compact way of categorizing molecular structures; furthermore, such descriptors can be readily used to catalog chemical reactions (i.e., bond-making and -breaking). As such, a number of graph-based methodologies have been developed with the goal of automating the process of generating chemical reaction network models describing the possible mechanistic chemistry in a given set of reactant species. Here, we outline the evolution of these graph-based reaction discovery schemes, with particular emphasis on more recent methods incorporating graph-based methods with semiempirical and ab initio electronic structure calculations, minimum-energy path refinements, and transition state searches. Using representative examples from homogeneous catalysis and interstellar chemistry, we highlight how these schemes increasingly act as "virtual reaction vessels" for interrogating mechanistic questions. Finally, we highlight where challenges remain, including issues of chemical accuracy and calculation speeds, as well as the inherent challenge of dealing with the vast size of accessible chemical reaction space.
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Affiliation(s)
- Idil Ismail
- Department of Chemistry, University of Warwick, CoventryCV4 7AL, United Kingdom
| | | | - Scott Habershon
- Department of Chemistry, University of Warwick, CoventryCV4 7AL, United Kingdom
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Ismail I, Khalal MA, Huttula M, Jänkälä K, Bizau JM, Cubaynes D, Hikosaka Y, Bučar K, Žitnik M, Andric L, Lablanquie P, Palaudoux J, Penent F. A modified magnetic bottle electron spectrometer for the detection of multiply charged ions in coincidence with all correlated electrons: decay pathways to Xe 3+ above xenon-4d ionization threshold. Phys Chem Chem Phys 2022; 24:20219-20227. [PMID: 35983783 DOI: 10.1039/d2cp02930h] [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: 11/21/2022]
Abstract
Single-photon multiple photoionization results from electron correlations that make this process possible beyond the independent electron approximation. To study this phenomenon experimentally, the detection in coincidence of all emitted electrons is the most direct approach. It provides the relative contribution of all possible multiple ionization processes, the energy distribution between electrons that can reveal simultaneous or sequential mechanisms, and, if possible, the angular correlations between electrons. In the present work, we present a new magnet design of our magnetic bottle electron spectrometer that allows the detection of multiply charged Xen+ ions in coincidence with n electrons. This new coincidence detection allows more efficient extraction of minor channels that are otherwise masked by random coincidences. The proof of principle is provided for xenon triple ionization.
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Affiliation(s)
- I Ismail
- Sorbonne Université, CNRS, Laboratoire de Chimie Physique-Matière et Rayonnement, LCPMR, F-75005 Paris Cedex 05, France.
| | - M A Khalal
- Sorbonne Université, CNRS, Laboratoire de Chimie Physique-Matière et Rayonnement, LCPMR, F-75005 Paris Cedex 05, France.
| | - M Huttula
- Nano and Molecular Systems Research Unit, University of Oulu, PO Box 3000, FI-90014, Finland
| | - K Jänkälä
- Nano and Molecular Systems Research Unit, University of Oulu, PO Box 3000, FI-90014, Finland
| | - J-M Bizau
- ISMO, CNRS UMR 8214, Université, Paris-Sud, bâtiment 350, F-91405, Orsay, France.,Synchrotron SOLEIL, l'Orme des Merisiers, Saint-Aubin, BP 48, F-91192, Gif-sur-Yvette Cedex, France
| | - D Cubaynes
- ISMO, CNRS UMR 8214, Université, Paris-Sud, bâtiment 350, F-91405, Orsay, France.,Synchrotron SOLEIL, l'Orme des Merisiers, Saint-Aubin, BP 48, F-91192, Gif-sur-Yvette Cedex, France
| | - Y Hikosaka
- Institute of Liberal Arts and Sciences, University of Toyama, 930-0194, Japan
| | - K Bučar
- Jozef Stefan Institute, Jamova Cesta 39, SI-1001 Ljubljana, Slovenia
| | - M Žitnik
- Jozef Stefan Institute, Jamova Cesta 39, SI-1001 Ljubljana, Slovenia
| | - L Andric
- Sorbonne Université, CNRS, Laboratoire de Chimie Physique-Matière et Rayonnement, LCPMR, F-75005 Paris Cedex 05, France.
| | - P Lablanquie
- Sorbonne Université, CNRS, Laboratoire de Chimie Physique-Matière et Rayonnement, LCPMR, F-75005 Paris Cedex 05, France.
| | - J Palaudoux
- Sorbonne Université, CNRS, Laboratoire de Chimie Physique-Matière et Rayonnement, LCPMR, F-75005 Paris Cedex 05, France.
| | - F Penent
- Sorbonne Université, CNRS, Laboratoire de Chimie Physique-Matière et Rayonnement, LCPMR, F-75005 Paris Cedex 05, France.
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11
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Ismail I, Robertson C, Habershon S. Successes and challenges in using machine-learned activation energies in kinetic simulations. J Chem Phys 2022; 157:014109. [DOI: 10.1063/5.0096027] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
The prediction of the thermodynamic and kinetic properties of chemical reactions is increasingly being addressed by machine-learning (ML) methods such as artificial neural networks (ANNs). While a number of recent studies have reported success in predicting chemical reaction activation energies, less attention has focused on how the accuracy of ML predictions filter through to predictions of macroscopic observables. Here, we consider the impact of the uncertainty associated with ML prediction of activation energies on observable properties of chemical reaction networks, as given by microkinetics simulations based on ML-predicted reaction rates. After training an ANN to predict activation energies given standard molecular descriptors for reactants and products alone, we performed microkinetics simulations of three different prototypical reaction networks: formamide decomposition, aldol reactions and decomposition of 3-hydroperoxypropanal. We find that the kinetic modelling predictions can be in excellent agreement with corresponding simulations performed with ab initio calculations, but this is dependent on the inherent energetic landscape of the networks. We use these simulations to suggest some guidelines for when ML-based activation energies can be reliable, and when one should take more care in applications to kinetics modelling.
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Affiliation(s)
| | | | - Scott Habershon
- Department of Chemistry, University of Warwick, United Kingdom
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Razman NA, Wan Ismail WZ, Abd Razak MH, Ismail I, Jamaludin J. Design and analysis of water quality monitoring and filtration system for different types of water in Malaysia. Int J Environ Sci Technol (Tehran) 2022; 20:3789-3800. [PMID: 35729914 PMCID: PMC9187848 DOI: 10.1007/s13762-022-04192-x] [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] [Figures] [Subscribe] [Scholar Register] [Received: 05/27/2021] [Revised: 12/31/2021] [Accepted: 04/10/2022] [Indexed: 06/15/2023]
Abstract
UNLABELLED Water pollution always occurs in Malaysia due to industrial, construction, agriculture, and household activities. River pollution can disturb water supply that eventually affects business and household activities. Thus, water quality monitoring system is needed to detect contaminated water. We developed a water quality monitoring and filtration system controlled by Arduino. The proposed system was designed in Proteus software and ThingSpeak platform was used for real-time monitoring. The main objective of the study was to compare water quality of river, lake and tap water in terms of pH, temperature, turbidity, electrical conductivity and oxidation-reduction potential. If the water quality was not satisfied, the water sample would be filtered through filtration system. Water turbidity level, pH, temperature, electrical conductivity, and oxidation-reduction potential for filtered and nonfiltered water were compared and analyzed according to international and national water quality standard. Besides that, statistical analysis such as box plot and one-way analysis of variance test was applied to validate data from the system. The real-time water quality monitoring system was implemented through data storage, data transfer, and data processing. The system was connected to wireless fidelity whereas the output data was sent to the user and monitored by ThingSpeak. The system can be further upgraded and scaled up to be applied in the main tank at our home or factory. The outcome of this research can be used as a reference for further study on lake and river pollution monitoring system. SUPPLEMENTARY INFORMATION The online version contains supplementary material available at 10.1007/s13762-022-04192-x.
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Affiliation(s)
- N. A. Razman
- Advanced Device and System, Faculty of Engineering and Built Environment, Universiti Sains Islam Malaysia, 71800 Nilai, Negeri Sembilan Malaysia
| | - W. Z. Wan Ismail
- Advanced Device and System, Faculty of Engineering and Built Environment, Universiti Sains Islam Malaysia, 71800 Nilai, Negeri Sembilan Malaysia
| | - M. H. Abd Razak
- Advanced Device and System, Faculty of Engineering and Built Environment, Universiti Sains Islam Malaysia, 71800 Nilai, Negeri Sembilan Malaysia
| | - I. Ismail
- Advanced Device and System, Faculty of Engineering and Built Environment, Universiti Sains Islam Malaysia, 71800 Nilai, Negeri Sembilan Malaysia
| | - J. Jamaludin
- Advanced Device and System, Faculty of Engineering and Built Environment, Universiti Sains Islam Malaysia, 71800 Nilai, Negeri Sembilan Malaysia
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Koulentianos D, Carniato S, Püttner R, Martins JB, Travnikova O, Marchenko T, Journel L, Guillemin R, Ismail I, Céolin D, Piancastelli MN, Feifel R, Simon M. The O K -2V spectrum of CO: the influence of the second core-hole. Phys Chem Chem Phys 2021; 23:10780-10790. [PMID: 33908498 DOI: 10.1039/d1cp00607j] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Using synchrotron radiation in the tender X-ray regime, a photoelectron spectrum showing the formation of single site double-core-hole pre-edge states, involving the K shell of the O atom in CO, has been recorded by means of high-resolution electron spectroscopy. The experimentally observed structures have been simulated, interpreted and assigned, employing state-of-the-art ab initio quantum chemical calculations, on the basis of a theoretical model, accounting for their so-called direct or conjugate character. Features appearing above the double ionization threshold have been reproduced by taking into account the strong mixing between multi-excited and continuum states. The shift of the σ* resonance below the double ionization threshold, in combination with the non-negligible contributions of multi-excited configurations in the final states reached, gives rise to a series of avoided crossings between the different potential energy curves.
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Affiliation(s)
- D Koulentianos
- Sorbonne Université, CNRS, Laboratoire de Chimie Physique-Matière et Rayonnement, F-75005 Paris Cedex 05, France
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Rais N, Bradley D, Hashim A, Isa N, Osman N, Ismail I, Hassan H, Noor N. Fabricated germanium-doped optical fibres for computed tomography dosimetry: Glow curve characteristics. Radiat Phys Chem Oxf Engl 1993 2021. [DOI: 10.1016/j.radphyschem.2020.108935] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
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15
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Fiddicke M, Fleissner F, Brinkhorst T, Obed D, Kühn EM, Boethig D, Ismail I, Haverich A, Warnecke G, Sommer W. Coronary Artery Bypass Grafting of Chronically Occluded Right Coronary Artery Improves Long-Term Survival. Thorac Cardiovasc Surg 2021. [DOI: 10.1055/s-0041-1725739] [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: 10/21/2022]
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16
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Fleissner F, Merhej H, Martens A, Cebotari S, Haverich A, Ismail I. Redo Coronary Artery Bypass Grafting in 416 Patients: An Individualized Approach Evolving Over Time. Thorac Cardiovasc Surg 2021. [DOI: 10.1055/s-0041-1725742] [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: 10/21/2022]
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17
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A. N, Ismail I, Elashtokhy M, Hegab M. The Monitoring and Molecular Identification of the Mealybug, Phenacoccus solenopsis Tinsley (Hemiptera: Pseudococcidae) on Okra Plants at Sharkia Governorate. Egyptian Academic Journal of Biological Sciences C, Physiology and Molecular Biology 2020. [DOI: 10.21608/eajbsc.2020.163663] [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] Open
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18
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Piancastelli MN, Marchenko T, Guillemin R, Journel L, Travnikova O, Ismail I, Simon M. Hard x-ray spectroscopy and dynamics of isolated atoms and molecules: a review. Rep Prog Phys 2020; 83:016401. [PMID: 31694003 DOI: 10.1088/1361-6633/ab5516] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
We present here a review of the most significant recent achievements in the field of HAXPES (hard x-ray photoelectron spectroscopy) on isolated atoms and molecules, and related spectroscopies. The possibility of conducting hard x-ray photoexcitation and photoionization experiments under state-of-the art conditions in terms of photon and electron kinetic energy resolution has become available only in the last few years. HAXPES has then produced structural and dynamical information at the level of detail already reached in the VUV and soft-x-ray ranges. The much improved experimental conditions have allowed extending to the hard x-ray range some methods well established in soft x-ray spectroscopies. Investigations of electron and nuclear dynamics in the femtosecond (fs, 10-15 s) and even attosecond (as, 10-18 s) regime have become feasible. Complex relaxation phenomena following deep-core ionization can now be enlightened in great detail. Other phenomena like e.g. recoil-induced effects are much more important in fast photoelectron emission, which can be induced by hard x-rays. Furthermore, a new kind of ionic states with double core holes can be observed by x-ray single-photon absorption. Future perspectives are also discussed.
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Affiliation(s)
- M N Piancastelli
- Sorbonne Université, CNRS, Laboratoire de Chimie Physique-Matière et Rayonnement, LCPMR, F-75005 Paris, France. Department of Physics and Astronomy, Uppsala University, SE-75120 Uppsala, Sweden
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Robertson C, Ismail I, Habershon S. Traversing Dense Networks of Elementary Chemical Reactions to Predict Minimum‐Energy Reaction Mechanisms. ChemSystemsChem 2019. [DOI: 10.1002/syst.201900047] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Christopher Robertson
- Department of Chemistry and Centre for Scientific Computing University of Warwick Coventry CV4 7AL United Kingdom
| | - Idil Ismail
- Department of Chemistry and Centre for Scientific Computing University of Warwick Coventry CV4 7AL United Kingdom
| | - Scott Habershon
- Department of Chemistry and Centre for Scientific Computing University of Warwick Coventry CV4 7AL United Kingdom
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20
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Ismail I. Corrosion Protection of Mild Steel by the Synergetic effect of Sodium Dodecylbenzenesulfonates and Zinc Sulfate in Sodium Chloride Solution. INT J ELECTROCHEM SC 2019. [DOI: 10.20964/2019.12.20] [Citation(s) in RCA: 3] [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: 11/23/2022]
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21
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Olasunmbo A, Adebowale O, Ismail I, Abayomi O. Rutin, ascorbic acid and a-tocophorel mitigate ketamine-induced n-methyl-d-aspartate receptor hypofunction in a wistar rat model of schizophrenia. IBRO Rep 2019. [DOI: 10.1016/j.ibror.2019.09.098] [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] Open
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Abstract
Abstract
Nature has the ability of sustainability and improvisation for better survival. This unique characteristic reflects a pattern of optimization that inspires the computational intelligence toward different scopes of optimization: a nondeterministic optimization approach or a nature-inspired metaheuristic algorithm. To date, there are many metaheuristic algorithms introduced with good promising results and also becoming a powerful method for solving numerous optimization problems. In this paper, a new metaheuristic algorithm inspired from a plant growth system is proposed, which is defined as tree physiology optimization (TPO). A plant growth consists of two main counterparts: plant shoots and roots. Shoots extend to find better sunlight for the photosynthesis process that converts light and water supplied from the roots into energy for plant growth; at the same time, roots elongate in the opposite way in search for water and nutrients for shoot survival. The collaboration from both systems ensures plant sustainability. This idea is transformed into an optimization algorithm: shoots with defined branches find the potential solution with the help of roots variable. The shoots-branches extension enhances the search diversity and the root system amplifying the search via evaluated fitness. To demonstrate its effectiveness, two different classes of problem are evaluated: (1) a continuous benchmark test function compared to particle swarm optimization (PSO) and genetic algorithm (GA) and (2) an NP-hard problem with the traveling salesman problem (TSP) compared to GA and nearest-neighbor (NN) algorithm. The simulation results show that TPO outperforms PSO and GA in all problem characteristics (flat surface and steep-drop with a combination of many local minima and plateau). In the TSP, TPO has a comparable result to GA.
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Rais NNM, Bradley DA, Hashim A, Isa NM, Osman ND, Ismail I, Hassan HA, Noor NM. Dosimetric response of fabricated Ge-doped optical fibres in computed tomography RQT beam quality x-ray beams. J Radiol Prot 2019; 39:N8-N18. [PMID: 31018196 DOI: 10.1088/1361-6498/ab1c16] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Novel germanium (Ge)-doped silica glass fibres tailor-made in Malaysia are fast gaining recognition as potential media for thermoluminescence (TL) dosimetry, with active research ongoing into exploitation of their various beneficial characteristics. Investigation is made herein of the capability of these media for use in diagnostic imaging dosimetry, specifically at the radiation dose levels typically obtained in conduct of Computed Tomography (CT). As a first step within such efforts, there is need to investigate the performance of the fibres using tightly defined spectra, use being made of a Philips constant potential industrial x-ray facility, Model MG165, located at the Malaysian Nuclear Agency Secondary Standards Dosimetry Lab (SSDL). Standard radiation beam qualities (termed RQT) have been established for CT, in accord with IEC 61267: 2003 and IAEA Technical Reports Series No. 457: 2007. A calibrated ionisation chamber has also been utilised, forming a component part of the SSDL equipment. The fabricated fibres used in this study are 2.3 mol% flat fibre (FF) of dimensions 643 × 356 μm2 and 2.3 mol% cylindrical fibre (CF) of 481 μm diameter, while the commercial fibre used is 4 mol% with core diameter of 50 μm. The dopant concentrations are nominal preform values. The fibres have been irradiated to doses of 20, 30 and 40 milligray (mGy) for each of the beam qualities RQT 8, RQT 9 and RQT 10. For x-rays generated at constant potential values from 100 to 150 kV, a discernible energy-dependent response is seen, comparisons being made with that of lithium fluoride (LiF) thermoluminescence dosimeters (TLD-100). TL yield versus dose has also been investigated for x-ray doses from 2 to 40 mGy, all exhibiting linearity. Compared to TLD-100, greater sensitivity is observed for the fibres.
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Affiliation(s)
- N N M Rais
- Department of Imaging, Faculty of Medicine and Health Sciences, Universiti Putra Malaysia, 43400 Serdang, Selangor, Malaysia
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Elkolaly A, El-Sayiad G, Mahrose K, Ismail I. GROWTH PERFORMANCE, SOME BLOOD COMPONENTS, CARCASS TRAITS AND INTESTINE HISTOLOGY OF BROILER CHICKS AS AFFECTED BY STOCKING DENSITY. ACTA ACUST UNITED AC 2019. [DOI: 10.21608/zjar.2019.47115] [Citation(s) in RCA: 1] [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: 10/26/2022]
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Ismail I, Stuttaford-Fowler HBVA, Ochan Ashok C, Robertson C, Habershon S. Automatic Proposal of Multistep Reaction Mechanisms using a Graph-Driven Search. J Phys Chem A 2019; 123:3407-3417. [DOI: 10.1021/acs.jpca.9b01014] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Affiliation(s)
- Idil Ismail
- Department of Chemistry and Centre for Scientific Computing, University of Warwick, Coventry CV4 7AL, United Kingdom
| | | | - Curtis Ochan Ashok
- Department of Chemistry and Centre for Scientific Computing, University of Warwick, Coventry CV4 7AL, United Kingdom
| | - Christopher Robertson
- Department of Chemistry and Centre for Scientific Computing, University of Warwick, Coventry CV4 7AL, United Kingdom
| | - Scott Habershon
- Department of Chemistry and Centre for Scientific Computing, University of Warwick, Coventry CV4 7AL, United Kingdom
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Ismail I, Bakar NF, Ling T, Ideris N, Zain ZH, Radacsi N. Morphology and Conductivity Evaluation of Electrospun Polyacrylic Acid (PAA) Microfiber. ACTA ACUST UNITED AC 2019. [DOI: 10.1016/j.matpr.2019.06.337] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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Fleissner F, Rümke S, Mogaldea A, Cebotari S, Ismail I, Warnecke G, Haverich A, Kühn C. ECLS Supported Transport of Intensive Care Unit Patients—Is It Worth the Effort? Thorac Cardiovasc Surg 2019. [DOI: 10.1055/s-0039-1678926] [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: 10/27/2022]
Affiliation(s)
- F. Fleissner
- Department of Cardiac-, Thoracic,-Transplantation and Vascular Surgery, Hannover Medical School, Hannover, Germany
| | - S. Rümke
- Department of Cardiac-, Thoracic,-Transplantation and Vascular Surgery, Hannover Medical School, Hannover, Germany
| | - A. Mogaldea
- Department of Cardiac-, Thoracic,-Transplantation and Vascular Surgery, Hannover Medical School, Hannover, Germany
| | - S. Cebotari
- Department of Cardiac-, Thoracic,-Transplantation and Vascular Surgery, Hannover Medical School, Hannover, Germany
| | - I. Ismail
- Department of Cardiac-, Thoracic,-Transplantation and Vascular Surgery, Hannover Medical School, Hannover, Germany
| | - G. Warnecke
- Department of Cardiac-, Thoracic,-Transplantation and Vascular Surgery, Hannover Medical School, Hannover, Germany
| | - A. Haverich
- Department of Cardiac-, Thoracic,-Transplantation and Vascular Surgery, Hannover Medical School, Hannover, Germany
| | - C. Kühn
- Department of Cardiac-, Thoracic,-Transplantation and Vascular Surgery, Hannover Medical School, Hannover, Germany
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Adizie J, Kadiri S, Ismail I, Woolhouse I, Turner A. A local qualitative study exploring facilitators and barriers to effective lung cancer decision making. Lung Cancer 2019. [DOI: 10.1016/s0169-5002(19)30057-1] [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: 11/29/2022]
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30
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Abuoghaba A, Rizk Y, Ismail I, Awadien N. Impact of hen treatment with bee pollen and thermal manipulation
during early egg incubation period on the hatchability
and embryonic development of chicks. J Anim Feed Sci 2018. [DOI: 10.22358/jafs/100622/2018] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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31
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Kukk E, Thomas TD, Céolin D, Granroth S, Travnikova O, Berholts M, Marchenko T, Guillemin R, Journel L, Ismail I, Püttner R, Piancastelli MN, Ueda K, Simon M. Energy Transfer into Molecular Vibrations and Rotations by Recoil in Inner-Shell Photoemission. Phys Rev Lett 2018; 121:073002. [PMID: 30169107 DOI: 10.1103/physrevlett.121.073002] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/18/2018] [Indexed: 06/08/2023]
Abstract
A mixture of CF_{4} and CO gases is used to study photoelectron recoil effects extending into the tender x-ray region. In CF_{4}, the vibrational envelope of the C 1s photoelectron spectrum becomes fully dominated by the recoil-induced excitations, revealing vibrational modes hidden from Franck-Condon excitations. In CO, using CF_{4} as an accurate energy calibrant, we determine the partitioning of the recoil-induced internal excitation energy between rotational and vibrational excitation. The observed rotational recoil energy is 2.88(28) times larger than the observed vibrational recoil energy, well in excess of the ratio of 2 predicted by the basic recoil model. The experiment is, however, in good agreement with the value of 2.68 if energy transfer via Coriolis coupling is included.
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Affiliation(s)
- E Kukk
- Department of Physics and Astronomy, University of Turku, FI-20014 Turku, Finland
| | - T D Thomas
- Department of Chemistry, Oregon State University, Corvallis, Oregon 97331, USA
| | - D Céolin
- Synchrotron SOLEIL, L'Orme des Merisiers, Saint-Aubin, B.P. 48, FR-91192 Gif-sur-Yvette Cedex, France
| | - S Granroth
- Department of Physics and Astronomy, University of Turku, FI-20014 Turku, Finland
| | - O Travnikova
- Sorbonne Université, CNRS, Laboratoire de Chimie Physique-Matière et Rayonnement, LCPMR, F-75005 Paris, France
| | - M Berholts
- Department of Physics and Astronomy, University of Turku, FI-20014 Turku, Finland
- Department of Physics, University of Tartu, EST-50411 Tartu, Estonia
| | - T Marchenko
- Sorbonne Université, CNRS, Laboratoire de Chimie Physique-Matière et Rayonnement, LCPMR, F-75005 Paris, France
| | - R Guillemin
- Sorbonne Université, CNRS, Laboratoire de Chimie Physique-Matière et Rayonnement, LCPMR, F-75005 Paris, France
| | - L Journel
- Sorbonne Université, CNRS, Laboratoire de Chimie Physique-Matière et Rayonnement, LCPMR, F-75005 Paris, France
| | - I Ismail
- Sorbonne Université, CNRS, Laboratoire de Chimie Physique-Matière et Rayonnement, LCPMR, F-75005 Paris, France
| | - R Püttner
- Fachbereich Physik, Freie Universität Berlin, Arnimallee 14, D-14195 Berlin-Dahlem, Germany
| | - M N Piancastelli
- Sorbonne Université, CNRS, Laboratoire de Chimie Physique-Matière et Rayonnement, LCPMR, F-75005 Paris, France
- Department of Physics and Astronomy, Uppsala University, SE-75120 Uppsala, Sweden
| | - K Ueda
- Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Sendai 980-8577, Japan
| | - M Simon
- Synchrotron SOLEIL, L'Orme des Merisiers, Saint-Aubin, B.P. 48, FR-91192 Gif-sur-Yvette Cedex, France
- Sorbonne Université, CNRS, Laboratoire de Chimie Physique-Matière et Rayonnement, LCPMR, F-75005 Paris, France
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Ismail I, Guillemin R, Marchenko T, Travnikova O, Ablett JM, Rueff JP, Piancastelli MN, Simon M, Journel L. Experimental setup for the study of resonant inelastic X-ray scattering of organometallic complexes in gas phase. Rev Sci Instrum 2018; 89:063107. [PMID: 29960531 DOI: 10.1063/1.5021536] [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] [Indexed: 06/08/2023]
Abstract
A new setup has been designed and built to study organometallic complexes in gas phase at the third-generation Synchrotron radiation sources. This setup consists of a new homemade computer-controlled gas cell that allows us to sublimate solid samples by accurately controlling the temperature. This cell has been developed to be a part of the high-resolution X-ray emission spectrometer permanently installed at the GALAXIES beamline of the French National Synchrotron Facility SOLEIL. To illustrate the capabilities of the setup, the cell has been successfully used to record high-resolution Kα emission spectra of gas-phase ferrocene Fe(C5H5)2 and to characterize their dependence with the excitation energy. This will allow to extend resonant X-ray emission to different organometallic molecules.
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Affiliation(s)
- I Ismail
- Sorbonne Université, UPMC Univ Paris 06, CNRS, UMR 7614, Laboratoire de Chimie Physique-Matière et Rayonnement, 75005 Paris Cedex 05, France
| | - R Guillemin
- Sorbonne Université, UPMC Univ Paris 06, CNRS, UMR 7614, Laboratoire de Chimie Physique-Matière et Rayonnement, 75005 Paris Cedex 05, France
| | - T Marchenko
- Sorbonne Université, UPMC Univ Paris 06, CNRS, UMR 7614, Laboratoire de Chimie Physique-Matière et Rayonnement, 75005 Paris Cedex 05, France
| | - O Travnikova
- Sorbonne Université, UPMC Univ Paris 06, CNRS, UMR 7614, Laboratoire de Chimie Physique-Matière et Rayonnement, 75005 Paris Cedex 05, France
| | - J M Ablett
- Synchrotron SOLEIL, l'Orme des Merisiers, Saint-Aubin, F-91192 Gif-sur-Yvette Cedex, France
| | - J-P Rueff
- Sorbonne Université, UPMC Univ Paris 06, CNRS, UMR 7614, Laboratoire de Chimie Physique-Matière et Rayonnement, 75005 Paris Cedex 05, France
| | - M-N Piancastelli
- Sorbonne Université, UPMC Univ Paris 06, CNRS, UMR 7614, Laboratoire de Chimie Physique-Matière et Rayonnement, 75005 Paris Cedex 05, France
| | - M Simon
- Sorbonne Université, UPMC Univ Paris 06, CNRS, UMR 7614, Laboratoire de Chimie Physique-Matière et Rayonnement, 75005 Paris Cedex 05, France
| | - L Journel
- Sorbonne Université, UPMC Univ Paris 06, CNRS, UMR 7614, Laboratoire de Chimie Physique-Matière et Rayonnement, 75005 Paris Cedex 05, France
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Martens A, Korte W, Shrestha M, Ismail I, Cebotari S, Warnecke G, Haverich A. Establishing a Simulation Training Platform for Cardiac Surgery Residents: Improving Surgical Training and Technical Skill Assessment. Thorac Cardiovasc Surg 2018. [DOI: 10.1055/s-0038-1628015] [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)
- A. Martens
- Klinik für Herz-, Thorax-, Transplantations- und Gefäßchirurgie, Medizinische Hochschule Hannover, Hannover, Germany
| | - W. Korte
- Klinik für Herz-, Thorax-, Transplantations- und Gefäßchirurgie, Medizinische Hochschule Hannover, Hannover, Germany
| | - M. Shrestha
- Klinik für Herz-, Thorax-, Transplantations- und Gefäßchirurgie, Medizinische Hochschule Hannover, Hannover, Germany
| | - I. Ismail
- Klinik für Herz-, Thorax-, Transplantations- und Gefäßchirurgie, Medizinische Hochschule Hannover, Hannover, Germany
| | - S. Cebotari
- Klinik für Herz-, Thorax-, Transplantations- und Gefäßchirurgie, Medizinische Hochschule Hannover, Hannover, Germany
| | - G. Warnecke
- Klinik für Herz-, Thorax-, Transplantations- und Gefäßchirurgie, Medizinische Hochschule Hannover, Hannover, Germany
| | - A. Haverich
- Klinik für Herz-, Thorax-, Transplantations- und Gefäßchirurgie, Medizinische Hochschule Hannover, Hannover, Germany
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Adizie J, Awan Z, Oswald N, Glover M, Turner A, Ismail I, Naidu B. What is quality of service in early NSCLC? Beyond resection rates at a tertiary thoracic surgical centre. Lung Cancer 2018. [DOI: 10.1016/s0169-5002(18)30209-5] [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: 10/18/2022]
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35
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Ismail I, Wert L, Hanke J, Dogan G, Chatterjee A, Feldmann C, Cebotari S, Haverich A, Schmitto J. Midterm Outcome of the Edge-to-Edge Mitral Valve Repair in Mitral Regurgitation. Thorac Cardiovasc Surg 2018. [DOI: 10.1055/s-0038-1627969] [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)
- I. Ismail
- Medizinische Hochschule Hannover, HTTG, Hannover, Germany
| | - L. Wert
- Medizinische Hochschule Hannover, HTTG, Hannover, Germany
| | - J. Hanke
- Medizinische Hochschule Hannover, HTTG, Hannover, Germany
| | - G. Dogan
- Medizinische Hochschule Hannover, HTTG, Hannover, Germany
| | - A. Chatterjee
- Medizinische Hochschule Hannover, HTTG, Hannover, Germany
| | - C. Feldmann
- Medizinische Hochschule Hannover, HTTG, Hannover, Germany
| | - S. Cebotari
- Medizinische Hochschule Hannover, HTTG, Hannover, Germany
| | - A. Haverich
- Medizinische Hochschule Hannover, HTTG, Hannover, Germany
| | - J. Schmitto
- Medizinische Hochschule Hannover, HTTG, Hannover, Germany
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36
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Hasan P, Sham S, Thambiah S, Samsudin I, Ismail I, Abdul Aziz A, Anthonysamy C, Omar R. Diagnostic Accuracy of an Accelerated Protocol Among Chest Pain Patients in the Emergency Department, Hospital Serdang. Int J Cardiol 2017. [DOI: 10.1016/j.ijcard.2017.09.062] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Feifel R, Eland JHD, Carniato S, Selles P, Püttner R, Koulentianos D, Marchenko T, Journel L, Guillemin R, Goldsztejn G, Travnikova O, Ismail I, Miranda BCD, Lago AF, Céolin D, Lablanquie P, Penent F, Piancastelli MN, Simon M. Cationic double K-hole pre-edge states of CS 2 and SF 6. Sci Rep 2017; 7:13317. [PMID: 29042664 PMCID: PMC5645408 DOI: 10.1038/s41598-017-13607-6] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [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: 08/01/2017] [Accepted: 09/26/2017] [Indexed: 11/09/2022] Open
Abstract
Recent advances in X-ray instrumentation have made it possible to measure the spectra of an essentially unexplored class of electronic states associated with double inner-shell vacancies. Using the technique of single electron spectroscopy, spectra of states in CS2 and SF6 with a double hole in the K-shell and one electron exited to a normally unoccupied orbital have been obtained. The spectra are interpreted with the aid of a high-level theoretical model giving excellent agreement with the experiment. The results shed new light on the important distinction between direct and conjugate shake-up in a molecular context. In particular, systematic similarities and differences between pre-edge states near single core holes investigated in X-ray absorption spectra and the corresponding states near double core holes studied here are brought out.
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Affiliation(s)
- R Feifel
- Department of Physics, University of Gothenburg, Origovägen 6B, SE-412 96, Gothenburg, Sweden.
| | - J H D Eland
- Department of Physics, University of Gothenburg, Origovägen 6B, SE-412 96, Gothenburg, Sweden.,Department of Chemistry, Physical and Theoretical Chemistry Laboratory, Oxford University, South Parks Road, Oxford, OX1 3QZ, United Kingdom
| | - S Carniato
- Sorbonne Universités, UPMC Univ Paris 06, CNRS, UMR 7614, Laboratoire de Chimie Physique-Matière et Rayonnement, 75005, Paris Cedex 05, France
| | - P Selles
- Sorbonne Universités, UPMC Univ Paris 06, CNRS, UMR 7614, Laboratoire de Chimie Physique-Matière et Rayonnement, 75005, Paris Cedex 05, France
| | - R Püttner
- Fachbereich Physik, Freie Universität Berlin, Arnimallee 14, D-14195, Berlin, Germany
| | - D Koulentianos
- Department of Physics, University of Gothenburg, Origovägen 6B, SE-412 96, Gothenburg, Sweden.,Sorbonne Universités, UPMC Univ Paris 06, CNRS, UMR 7614, Laboratoire de Chimie Physique-Matière et Rayonnement, 75005, Paris Cedex 05, France
| | - T Marchenko
- Sorbonne Universités, UPMC Univ Paris 06, CNRS, UMR 7614, Laboratoire de Chimie Physique-Matière et Rayonnement, 75005, Paris Cedex 05, France.,Synchrotron SOLEIL, L'Orme des Merisiers, Saint-Aubin, BP 48, F-91192, Gif-sur-Yvette Cedex, France
| | - L Journel
- Sorbonne Universités, UPMC Univ Paris 06, CNRS, UMR 7614, Laboratoire de Chimie Physique-Matière et Rayonnement, 75005, Paris Cedex 05, France.,Synchrotron SOLEIL, L'Orme des Merisiers, Saint-Aubin, BP 48, F-91192, Gif-sur-Yvette Cedex, France
| | - R Guillemin
- Sorbonne Universités, UPMC Univ Paris 06, CNRS, UMR 7614, Laboratoire de Chimie Physique-Matière et Rayonnement, 75005, Paris Cedex 05, France.,Synchrotron SOLEIL, L'Orme des Merisiers, Saint-Aubin, BP 48, F-91192, Gif-sur-Yvette Cedex, France
| | - G Goldsztejn
- Sorbonne Universités, UPMC Univ Paris 06, CNRS, UMR 7614, Laboratoire de Chimie Physique-Matière et Rayonnement, 75005, Paris Cedex 05, France.,Max-Born-Institut, Max-Born-Strasse 2A, 12489, Berlin, Germany
| | - O Travnikova
- Sorbonne Universités, UPMC Univ Paris 06, CNRS, UMR 7614, Laboratoire de Chimie Physique-Matière et Rayonnement, 75005, Paris Cedex 05, France.,Synchrotron SOLEIL, L'Orme des Merisiers, Saint-Aubin, BP 48, F-91192, Gif-sur-Yvette Cedex, France
| | - I Ismail
- Sorbonne Universités, UPMC Univ Paris 06, CNRS, UMR 7614, Laboratoire de Chimie Physique-Matière et Rayonnement, 75005, Paris Cedex 05, France
| | - B Cunha de Miranda
- Sorbonne Universités, UPMC Univ Paris 06, CNRS, UMR 7614, Laboratoire de Chimie Physique-Matière et Rayonnement, 75005, Paris Cedex 05, France
| | - A F Lago
- Centro de Ciências Naturais e Humanas, Universidade Federal do ABC (UFABC), Av. dos Estados, 5001, 09210-580, Santo André, SP, Brazil
| | - D Céolin
- Synchrotron SOLEIL, L'Orme des Merisiers, Saint-Aubin, BP 48, F-91192, Gif-sur-Yvette Cedex, France
| | - P Lablanquie
- Sorbonne Universités, UPMC Univ Paris 06, CNRS, UMR 7614, Laboratoire de Chimie Physique-Matière et Rayonnement, 75005, Paris Cedex 05, France
| | - F Penent
- Sorbonne Universités, UPMC Univ Paris 06, CNRS, UMR 7614, Laboratoire de Chimie Physique-Matière et Rayonnement, 75005, Paris Cedex 05, France
| | - M N Piancastelli
- Sorbonne Universités, UPMC Univ Paris 06, CNRS, UMR 7614, Laboratoire de Chimie Physique-Matière et Rayonnement, 75005, Paris Cedex 05, France.,Department of Physics and Astronomy, Uppsala University, Box 516, SE-751 20, Uppsala, Sweden
| | - M Simon
- Sorbonne Universités, UPMC Univ Paris 06, CNRS, UMR 7614, Laboratoire de Chimie Physique-Matière et Rayonnement, 75005, Paris Cedex 05, France.,Synchrotron SOLEIL, L'Orme des Merisiers, Saint-Aubin, BP 48, F-91192, Gif-sur-Yvette Cedex, France
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Ismail I, Mahmod Ilya I. Nephroprotective effect of Clinacanthus nutans against cisplatin-induced human kidney cell (PCS-400 – 010). Am J Transl Res 2017. [DOI: 10.1055/s-0037-1608407] [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: 10/18/2022]
Affiliation(s)
- I Ismail
- Laboratory of Natural Products, Institute of Bioscience, Universiti Putra Malaysia, Serdang, Malaysia
| | - I Mahmod Ilya
- Laboratory of Natural Products, Institute of Bioscience, Universiti Putra Malaysia, Serdang, Malaysia
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Marchenko T, Goldsztejn G, Jänkälä K, Travnikova O, Journel L, Guillemin R, Sisourat N, Céolin D, Žitnik M, Kavčič M, Bučar K, Mihelič A, de Miranda BC, Ismail I, Lago AF, Gel'mukhanov F, Püttner R, Piancastelli MN, Simon M. Potential Energy Surface Reconstruction and Lifetime Determination of Molecular Double-Core-Hole States in the Hard X-Ray Regime. Phys Rev Lett 2017; 119:133001. [PMID: 29341715 DOI: 10.1103/physrevlett.119.133001] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/19/2017] [Indexed: 06/07/2023]
Abstract
A combination of resonant inelastic x-ray scattering and resonant Auger spectroscopy provides complementary information on the dynamic response of resonantly excited molecules. This is exemplified for CH_{3}I, for which we reconstruct the potential energy surface of the dissociative I 3d^{-2} double-core-hole state and determine its lifetime. The proposed method holds a strong potential for monitoring the hard x-ray induced electron and nuclear dynamic response of core-excited molecules containing heavy elements, where ab initio calculations of potential energy surfaces and lifetimes remain challenging.
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Affiliation(s)
- T Marchenko
- Sorbonne Universités, UPMC Univ Paris 06, CNRS, UMR 7614, Laboratoire de Chimie Physique-Matière et Rayonnement, F-75005 Paris, France
- Synchrotron SOLEIL, l'Orme des Merisiers, Saint-Aubin, BP 48, F-91192 Gif-sur-Yvette Cedex, France
| | - G Goldsztejn
- Sorbonne Universités, UPMC Univ Paris 06, CNRS, UMR 7614, Laboratoire de Chimie Physique-Matière et Rayonnement, F-75005 Paris, France
- Max-Born-Institut, Max-Born-Straße 2A, 12489 Berlin, Germany
| | - K Jänkälä
- Nano and Molecular Systems Research Unit, University of Oulu, P.O. Box 3000, 90014 Oulu, Finland
| | - O Travnikova
- Sorbonne Universités, UPMC Univ Paris 06, CNRS, UMR 7614, Laboratoire de Chimie Physique-Matière et Rayonnement, F-75005 Paris, France
- Synchrotron SOLEIL, l'Orme des Merisiers, Saint-Aubin, BP 48, F-91192 Gif-sur-Yvette Cedex, France
| | - L Journel
- Sorbonne Universités, UPMC Univ Paris 06, CNRS, UMR 7614, Laboratoire de Chimie Physique-Matière et Rayonnement, F-75005 Paris, France
- Synchrotron SOLEIL, l'Orme des Merisiers, Saint-Aubin, BP 48, F-91192 Gif-sur-Yvette Cedex, France
| | - R Guillemin
- Sorbonne Universités, UPMC Univ Paris 06, CNRS, UMR 7614, Laboratoire de Chimie Physique-Matière et Rayonnement, F-75005 Paris, France
- Synchrotron SOLEIL, l'Orme des Merisiers, Saint-Aubin, BP 48, F-91192 Gif-sur-Yvette Cedex, France
| | - N Sisourat
- Sorbonne Universités, UPMC Univ Paris 06, CNRS, UMR 7614, Laboratoire de Chimie Physique-Matière et Rayonnement, F-75005 Paris, France
| | - D Céolin
- Synchrotron SOLEIL, l'Orme des Merisiers, Saint-Aubin, BP 48, F-91192 Gif-sur-Yvette Cedex, France
| | - M Žitnik
- Jožef Stefan Institute, SI-1001 Ljubljana, Slovenia
| | - M Kavčič
- Jožef Stefan Institute, SI-1001 Ljubljana, Slovenia
| | - K Bučar
- Jožef Stefan Institute, SI-1001 Ljubljana, Slovenia
| | - A Mihelič
- Jožef Stefan Institute, SI-1001 Ljubljana, Slovenia
| | - B Cunha de Miranda
- Sorbonne Universités, UPMC Univ Paris 06, CNRS, UMR 7614, Laboratoire de Chimie Physique-Matière et Rayonnement, F-75005 Paris, France
| | - I Ismail
- Sorbonne Universités, UPMC Univ Paris 06, CNRS, UMR 7614, Laboratoire de Chimie Physique-Matière et Rayonnement, F-75005 Paris, France
| | - A F Lago
- Centro de Ciências Naturais e Humanas, Universidade Federal do ABC (UFABC), 09210-580 Santo André, SP, Brazil
| | - F Gel'mukhanov
- Theoretical Chemistry & Biology, School of Biotechnology, Royal Institute of Technology, SE-106 91 Stockholm, Sweden
- Institute of Nanotechnology, Spectroscopy and Quantum Chemistry, Siberian Federal University, 660041 Krasnoyarsk, Russia
| | - R Püttner
- Fachbereich Physik, Freie Universität Berlin, D-14195 Berlin, Germany
| | - M N Piancastelli
- Sorbonne Universités, UPMC Univ Paris 06, CNRS, UMR 7614, Laboratoire de Chimie Physique-Matière et Rayonnement, F-75005 Paris, France
- Department of Physics and Astronomy, Uppsala University, PO Box 516, SE-751 20 Uppsala, Sweden
| | - M Simon
- Sorbonne Universités, UPMC Univ Paris 06, CNRS, UMR 7614, Laboratoire de Chimie Physique-Matière et Rayonnement, F-75005 Paris, France
- Synchrotron SOLEIL, l'Orme des Merisiers, Saint-Aubin, BP 48, F-91192 Gif-sur-Yvette Cedex, France
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Singh S, Ismail I, Dhillon A, Arora R. P4221Successful PCI of chronic total occlusion of coronary arteries with drug eluting stents improves outcomes: a systematic review and meta-analysis. Eur Heart J 2017. [DOI: 10.1093/eurheartj/ehx504.p4221] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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Abstract
ABSTRACT
Rubber/metal composites are known to be highly durable in a normal atmospheric condition. However, when they are exposed to an aggressive environment such as the marine environment, they tend to fail prematurely. The failure is usually caused by the loss of adhesion of the rubber to metal substrate. The aim of this work is to elucidate the adhesion failure mechanism by using a commercial bonding system for bonded rubber/metal exposed in a marine environment. A simulation study that was carried out through a salt spray test indicated that corrosion of the exposed metal substrates induced the loss of adhesion through cathodic disbonding. Laboratory exposure in alkaline medium, cathodic disbonding, and anodic undermining tests suggested that the hydroxyl ions generated from corrosion reactions contributed to the adhesion failure.
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Affiliation(s)
- I. Ismail
- Rubber Research Institute of Malaysia, Malaysian Rubber Board, Kuala Lumpur 50908, Malaysia
| | - M. K. Harun
- Electrochemical and Corrosion Science Laboratory, Faculty of Applied Science, Universiti Teknologi Mara, 40450 Shah Alam Selangor, Malaysia
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Travnikova O, Sisourat N, Marchenko T, Goldsztejn G, Guillemin R, Journel L, Céolin D, Ismail I, Lago AF, Püttner R, Piancastelli MN, Simon M. Subfemtosecond Control of Molecular Fragmentation by Hard X-Ray Photons. Phys Rev Lett 2017; 118:213001. [PMID: 28598654 DOI: 10.1103/physrevlett.118.213001] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/15/2017] [Indexed: 06/07/2023]
Abstract
Tuning hard x-ray excitation energy along Cl 1s→σ^{*} resonance in gaseous HCl allows manipulating molecular fragmentation in the course of the induced multistep ultrafast dissociation. The observations are supported by theoretical modeling, which shows a strong interplay between the topology of the potential energy curves, involved in the Auger cascades, and the so-called core-hole clock, which determines the time spent by the system in the very first step. The asymmetric profile of the fragmentation ratios reflects different dynamics of nuclear wave packets dependent on the photon energy.
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Affiliation(s)
- O Travnikova
- Sorbonne Universités, UPMC Univ Paris 06, CNRS, UMR 7614, Laboratoire de Chimie Physique-Matière et Rayonnement, F-75005 Paris, France
- Synchrotron SOLEIL, L'Orme des Merisiers, Saint-Aubin, BP 48, F-91192 Gif-sur-Yvette Cedex, France
| | - N Sisourat
- Sorbonne Universités, UPMC Univ Paris 06, CNRS, UMR 7614, Laboratoire de Chimie Physique-Matière et Rayonnement, F-75005 Paris, France
| | - T Marchenko
- Sorbonne Universités, UPMC Univ Paris 06, CNRS, UMR 7614, Laboratoire de Chimie Physique-Matière et Rayonnement, F-75005 Paris, France
- Synchrotron SOLEIL, L'Orme des Merisiers, Saint-Aubin, BP 48, F-91192 Gif-sur-Yvette Cedex, France
| | - G Goldsztejn
- Sorbonne Universités, UPMC Univ Paris 06, CNRS, UMR 7614, Laboratoire de Chimie Physique-Matière et Rayonnement, F-75005 Paris, France
| | - R Guillemin
- Sorbonne Universités, UPMC Univ Paris 06, CNRS, UMR 7614, Laboratoire de Chimie Physique-Matière et Rayonnement, F-75005 Paris, France
- Synchrotron SOLEIL, L'Orme des Merisiers, Saint-Aubin, BP 48, F-91192 Gif-sur-Yvette Cedex, France
| | - L Journel
- Sorbonne Universités, UPMC Univ Paris 06, CNRS, UMR 7614, Laboratoire de Chimie Physique-Matière et Rayonnement, F-75005 Paris, France
- Synchrotron SOLEIL, L'Orme des Merisiers, Saint-Aubin, BP 48, F-91192 Gif-sur-Yvette Cedex, France
| | - D Céolin
- Synchrotron SOLEIL, L'Orme des Merisiers, Saint-Aubin, BP 48, F-91192 Gif-sur-Yvette Cedex, France
| | - I Ismail
- Sorbonne Universités, UPMC Univ Paris 06, CNRS, UMR 7614, Laboratoire de Chimie Physique-Matière et Rayonnement, F-75005 Paris, France
| | - A F Lago
- Centro de Ciências Naturais e Humanas, Universidade Federal do ABC (UFABC), 09210-170 Santo André, São Paulo, Brazil
| | - R Püttner
- Fachbereich Physik, Freie Universität Berlin, D-14195 Berlin, Germany
| | - M N Piancastelli
- Sorbonne Universités, UPMC Univ Paris 06, CNRS, UMR 7614, Laboratoire de Chimie Physique-Matière et Rayonnement, F-75005 Paris, France
- Department of Physics and Astronomy, Uppsala University, SE-75120 Uppsala, Sweden
| | - M Simon
- Sorbonne Universités, UPMC Univ Paris 06, CNRS, UMR 7614, Laboratoire de Chimie Physique-Matière et Rayonnement, F-75005 Paris, France
- Synchrotron SOLEIL, L'Orme des Merisiers, Saint-Aubin, BP 48, F-91192 Gif-sur-Yvette Cedex, France
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43
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Rojas S, Trinh-Adams M, Schmitto J, Hanke J, Fleissner F, Uribarri A, Warnecke G, Martens A, Shrestha M, Cebotari S, Haverich A, Ismail I. Early Surgical Myocardial Revascularization in Non-ST-Segment Elevation Acute Coronary Syndrome. Thorac Cardiovasc Surg 2017. [DOI: 10.1055/s-0037-1598765] [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: 10/20/2022]
Affiliation(s)
- S.V. Rojas
- Medizinische Hochschule Hannover, Klinik für Herz-, Thorax-, Transplantations- und Gefäßchirurgie, Hannover, Germany
| | - M.L. Trinh-Adams
- Medizinische Hochschule Hannover, Klinik für Herz-, Thorax-, Transplantations- und Gefäßchirurgie, Hannover, Germany
| | - J.D. Schmitto
- Medizinische Hochschule Hannover, Klinik für Herz-, Thorax-, Transplantations- und Gefäßchirurgie, Hannover, Germany
| | - J.S. Hanke
- Medizinische Hochschule Hannover, Klinik für Herz-, Thorax-, Transplantations- und Gefäßchirurgie, Hannover, Germany
| | - F. Fleissner
- Medizinische Hochschule Hannover, Klinik für Herz-, Thorax-, Transplantations- und Gefäßchirurgie, Hannover, Germany
| | - A. Uribarri
- Medizinische Hochschule Hannover, Klinik für Herz-, Thorax-, Transplantations- und Gefäßchirurgie, Hannover, Germany
| | - G. Warnecke
- Medizinische Hochschule Hannover, Klinik für Herz-, Thorax-, Transplantations- und Gefäßchirurgie, Hannover, Germany
| | - A. Martens
- Medizinische Hochschule Hannover, Klinik für Herz-, Thorax-, Transplantations- und Gefäßchirurgie, Hannover, Germany
| | - M. Shrestha
- Medizinische Hochschule Hannover, Klinik für Herz-, Thorax-, Transplantations- und Gefäßchirurgie, Hannover, Germany
| | - S. Cebotari
- Medizinische Hochschule Hannover, Klinik für Herz-, Thorax-, Transplantations- und Gefäßchirurgie, Hannover, Germany
| | - A. Haverich
- Medizinische Hochschule Hannover, Klinik für Herz-, Thorax-, Transplantations- und Gefäßchirurgie, Hannover, Germany
| | - I. Ismail
- Medizinische Hochschule Hannover, Klinik für Herz-, Thorax-, Transplantations- und Gefäßchirurgie, Hannover, Germany
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Beckmann E, Rustum S, Fleissner F, Wiegmann B, Shrestha M, Martens A, Haverich A, Ismail I. Surgical Treatment of Coronary Artery Aneurysms. Thorac Cardiovasc Surg 2017. [DOI: 10.1055/s-0037-1598706] [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: 10/20/2022]
Affiliation(s)
| | - S. Rustum
- Hannover Medical School, Hannover, Germany
| | | | | | | | - A. Martens
- Hannover Medical School, Hannover, Germany
| | | | - I. Ismail
- Hannover Medical School, Hannover, Germany
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Wiegmann B, Ismail I, Haverich A. [Erratum to: Cardiac surgery in the elderly]. Chirurg 2017; 88:115. [PMID: 28127653 DOI: 10.1007/s00104-017-0372-9] [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: 11/26/2022]
Affiliation(s)
- B Wiegmann
- Klinik für Herz-, Thorax-, Transplatations- und, Gefäßchirurgie, Medizinische Hochschule Hannover, Carl-Neuberg-Str. 1, 30625, Hannover, Deutschland.
| | - I Ismail
- Klinik für Herz-, Thorax-, Transplatations- und, Gefäßchirurgie, Medizinische Hochschule Hannover, Carl-Neuberg-Str. 1, 30625, Hannover, Deutschland
| | - A Haverich
- Klinik für Herz-, Thorax-, Transplatations- und, Gefäßchirurgie, Medizinische Hochschule Hannover, Carl-Neuberg-Str. 1, 30625, Hannover, Deutschland
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Fetyan N, Azeiz A, Ismail I, Salem T. Biodegradation of Cibacron Redazo Dye and Industrial Textile Effluent by Pseudomonas aeruginosa Immobilized on Chitosan-Fe2O3 Composite. ACTA ACUST UNITED AC 2017. [DOI: 10.9734/jabb/2017/31332] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Ismail I, Harun MK. CATHODIC DISBONDING OF INDUSTRIAL CHLORINATED RUBBER-BASED PRIMER USED IN RUBBER/METAL COMPOSITES: AN ELECTROCHEMICAL IMPEDANCE SPECTROSCOPY ANALYSIS. Rubber Chemistry and Technology 2016. [DOI: 10.5254/rct.16.83793] [Citation(s) in RCA: 4] [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] [Indexed: 11/11/2022]
Abstract
ABSTRACT
Chemlok 205 primer is a common bonding agent used together with a top coat in rubber/metal–bonded composites. Recent studies indicated that a stand-alone Chemlok 205 primer failed when its metal substrate underwent corrosion. The failure was suspected to be caused by coating degradation, followed by cathodic disbonding, induced from the corrosion reaction. Therefore, in this work, the effect of cathodic polarization on the coating delamination was further investigated. The work intends to focus on understanding the adhesion failure processes involved. Thus, electrochemical impedance spectroscopy (EIS) was employed on a stand-alone industrial coating Chemlok 205 primer on mild steel substrate subjected to cathodic polarization potential of −0.8 V versus Ag/AgCl reference electrode in 0.5 M NaCl. The coating barrier properties were interpreted through Nyquist and Bode plots of the EIS plots for a selected time interval. The data obtained were modeled against three distinguished electrical equivalent circuits representing the stages of coating degradation against time. Analysis through Nyquist and Bode plots indicated that the stand-alone Chemlok 205 primer coating experienced a significant drop in coating impedance before experiencing adhesion loss. The changes in the coating capacitance and coating resistance indicated that the coating underwent degradation first before adhesion failure.
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Affiliation(s)
- I. Ismail
- Rubber Research Institute of Malaysia, Malaysian Rubber Board, 50908, Kuala Lumpur, Malaysia
| | - M. K. Harun
- Electrochemical and Corrosion Science Laboratory, Faculty of Applied Science, Universiti Teknologi Mara, 40450 Shah Alam Selangor, Malaysia
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Rawat F, Nolan A, Teo S, Triggs M, Carroll G, Picardo S, Keegan N, Mallett V, Ismail I, Hennessy B, Grogan W, Breathnach O, Morris P. The pharmacokinetics of methotrexate with and without rituximab in the treatment of primary central nervous system lymphoma (PCNSL). Ann Oncol 2016. [DOI: 10.1093/annonc/mdw367.10] [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: 11/14/2022] Open
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Boyle RJ, Tang ML, Chiang WC, Chua MC, Ismail I, Nauta A, Hourihane JO, Smith P, Gold M, Ziegler J, Peake J, Quinn P, Rao R, Brown N, Rijnierse A, Garssen J, Warner JO, Axelrad C, Jeffries S, Donald Y, Barham H, Brown J, Wickenden R, Barnes T, Taylor S, Smith S, Thomas N, Goh A, Anng WA, Hua CCY, Daly D, Lafford S, Cullinane C, Bindels J, Merwe L, Klaassen D, Swinkels S, Knipping K. Prebiotic-supplemented partially hydrolysed cow's milk formula for the prevention of eczema in high-risk infants: a randomized controlled trial. Allergy 2016; 71:701-10. [PMID: 27111273 PMCID: PMC4996326 DOI: 10.1111/all.12848] [Citation(s) in RCA: 64] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/22/2016] [Indexed: 12/14/2022]
Abstract
Background Prevention guidelines for infants at high risk of allergic disease recommend hydrolysed formula if formula is introduced before 6 months, but evidence is mixed. Adding specific oligosaccharides may improve outcomes. Objective To evaluate whether partially hydrolysed whey formula containing oligosaccharides (0.8 g/100 ml) (pHF‐OS) can prevent eczema in high‐risk infants [ISRCTN65195597]. Methods We conducted a parallel‐group, multicentre, randomized double‐blind controlled trial of pHF‐OS vs standard cow's milk formula. Infants with a family history of allergic disease were randomized (stratified by centre/maternal allergy) to active (n = 432) or control (n = 431) formula until 6 months of age if formula was introduced before 18 weeks. Primary outcome was cumulative incidence of eczema by 12 months in infants randomized at 0–4 weeks (375 pHF‐OS, 383 control). Secondary outcomes were cumulative incidence of eczema by 12 or 18 months in all infants randomized, immune markers at 6 months and adverse events. Results Eczema occurred by 12 months in 84/293 (28.7%) infants allocated to pHF‐OS at 0‐4 weeks of age, vs 93/324 (28.7%) control (OR 0.98 95% CI 0.68, 1.40; P = 0.90), and 107/347 (30.8%) pHF‐OS vs 112/370 (30.3%) control in all infants randomized (OR 0.99 95% CI 0.71, 1.37; P = 0.94). pHF‐OS did not change most immune markers including total/specific IgE; however, pHF‐OS reduced cow's milk‐specific IgG1 (P < 0.0001) and increased regulatory T‐cell and plasmacytoid dendritic cell percentages. There was no group difference in adverse events. Conclusion pHF‐OS does not prevent eczema in the first year in high‐risk infants. The immunological changes found require confirmation in a separate cohort.
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Affiliation(s)
- R. J. Boyle
- Section of Paediatrics Imperial College London London UK
- Imperial College Healthcare NHS Trust London UK
| | - M. L.‐K. Tang
- Royal Children's Hospital Melbourne Melbourne Vic. Australia
- Murdoch Children's Research Institute Melbourne Vic. Australia
- University of Melbourne Melbourne Vic. Australia
| | - W. C. Chiang
- KK Women's and Children's Hospital Singapore City Singapore
| | - M. C. Chua
- KK Women's and Children's Hospital Singapore City Singapore
| | - I. Ismail
- Murdoch Children's Research Institute Melbourne Vic. Australia
- University of Melbourne Melbourne Vic. Australia
| | - A. Nauta
- Nutricia Research Utrecht the Netherlands
- Utrecht Institute for Pharmaceutical Sciences Utrecht the Netherlands
| | | | - P. Smith
- Gold Coast Hospital Gold Coast Qld Australia
| | - M. Gold
- Women's and Children's Hospital Adelaide SA Australia
| | - J. Ziegler
- Sydney Children's Hospital Sydney NSW Australia
| | - J. Peake
- Royal Children's Hospital Brisbane Brisbane Qld Australia
| | - P. Quinn
- Women's and Children's Hospital Adelaide SA Australia
| | - R. Rao
- Poole Hospital NHS Foundation Trust Poole UK
| | - N. Brown
- Salisbury Healthcare NHS Trust Salisbury UK
| | - A. Rijnierse
- Nutricia Research Utrecht the Netherlands
- Utrecht Institute for Pharmaceutical Sciences Utrecht the Netherlands
| | - J. Garssen
- Nutricia Research Utrecht the Netherlands
- Utrecht Institute for Pharmaceutical Sciences Utrecht the Netherlands
| | - J. O. Warner
- Section of Paediatrics Imperial College London London UK
- Imperial College Healthcare NHS Trust London UK
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