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Guler O, Hurmuz P, Atalar B, Guney YY, Saglam E, Akyurek S, Bolukbasi Y, Güral Z, Tugrul F, Korcum A, Sen C, Yildirim BA, Oksuz D, Celik OK, Kurt M, Guzeloz Z, Yavas G, Ozyigit G, Aksu M, Onal C. The Treatment Outcomes of Oligometastatic Colorectal Cancer Patients Treated with Stereotactic Body Radiation Therapy: A Multi-Institutional Analysis TROD 02-008. Int J Radiat Oncol Biol Phys 2022. [DOI: 10.1016/j.ijrobp.2022.07.988] [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: 12/01/2022]
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Kurt M, Isik O, Cubukcu E, Gorken IB, Ozturk E, Terzi C, Yılmazlar T. A Comparison of Standard Neoadjuvant Long-Course Chemoradiotherapy and Near-Total Neoadjuvant Therapy in Rectal Cancer: A Matched Pair Analysis at Equal Time Interval. Int J Radiat Oncol Biol Phys 2022. [DOI: 10.1016/j.ijrobp.2022.07.990] [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: 10/31/2022]
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Guler O, Oymak E, Yazici G, Akagunduz OO, Cetinayak O, Erpolat P, Aksoy A, Duzova M, Yildirim BA, Kurt M, Canyılmaz E, Akyurek S, Atalar B, Yavas G, Oksuz D, Saglam E, Celik OK, Cengiz M, Onal C. The Treatment Outcomes of Patients with Cervical Esophageal Carcinoma Undergoing Definitive Chemoradiotherapy: A Multi-Institutional Analysis TROD 01-005. Int J Radiat Oncol Biol Phys 2022. [DOI: 10.1016/j.ijrobp.2022.07.1027] [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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Han T, Mivehchi A, Kurt M, Moored KW. Tailoring the bending pattern of non-uniformly flexible pitching hydrofoils enhances propulsive efficiency. Bioinspir Biomim 2022; 17:065003. [PMID: 36065966 DOI: 10.1088/1748-3190/ac7f70] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/17/2022] [Accepted: 07/07/2022] [Indexed: 06/15/2023]
Abstract
We present new measurements of non-uniformly flexible pitching foils fabricated with a rigid leading section joined to a flexible trailing section. This construction enables us to vary the bending pattern and resonance condition of the foils independently. A novel effective flexibility, defined as the ratio of added mass forces to elastic forces, is proposed and shown to provide a scaling for the natural frequencies of the fluid-structural system. Foils with very flexible trailing sections ofEI< 1.81 × 10-5N m2do not show a detectable resonance and are classified as 'non-resonating' as opposed to 'resonating' foils. Moreover, the non-resonating foils exhibit a novel bending pattern where the foil has a discontinuous hinge-like deflection instead of the smooth beam-like deflection of the resonating foils. Performance measurements reveal that both resonating and non-resonating foils can achieve high propulsive efficiencies of around 50% or more. It is discovered that non-uniformly flexible foils outperform their rigid and uniformly flexible counterparts, and that there is an optimal flexion ratio from 0.4 ⩽λ⩽ 0.7 that maximizes the efficiency. Furthermore, this optimal range coincides with the flexion ratios observed in nature. Performance is also compared under the same dimensionless flexural rigidity,R*, which highlights that at the same flexion ratio more flexible foils achieve higher peak efficiencies. Overall, to achieve high propulsive efficiency non-uniformly flexible hydrofoils should (1) oscillate above their first natural frequency, (2) have a flexion ratio in the range of 0.4 ⩽λ⩽ 0.7 and (3) have a small dimensionless rigidity at their optimal flexion ratio. Scaling laws for rigid pitching foils are found to be valid for non-uniformly flexible foils as long as the measured amplitude response is used and the deflection angle of the trailing sectionβ is < 45°. This work provides guidance for the development of high-performance underwater vehicles using simple purely pitching bio-inspired propulsive drives.
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Affiliation(s)
- Tianjun Han
- Mechanical Engineering and Mechanics, Lehigh University, Bethlehem, PA 18015, United States of America
| | - Amin Mivehchi
- Mechanical Engineering and Mechanics, Lehigh University, Bethlehem, PA 18015, United States of America
| | - Melike Kurt
- Aerodynamics and Flight Mechanics Group, Engineering and Physical Sciences, University of Southampton, Southampton SO17 1BJ, United Kingdom
| | - Keith W Moored
- Mechanical Engineering and Mechanics, Lehigh University, Bethlehem, PA 18015, United States of America
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Escudier B, Motzer R, Dyer M, May J, Ejzykowicz F, Kurt M, Lee CW, Wang P, Testa E, Sharpe D, George S, Tannir N. 1459P Analysis of long-term efficacy outcomes from the CheckMate 025 (CM 025) trial comparing nivolumab (NIVO) vs everolimus (EVE) based on ≥ 7 years (yrs) of follow-up in pre-treated patients (pts) with advanced renal cell carcinoma (aRCC). Ann Oncol 2022. [DOI: 10.1016/j.annonc.2022.07.1562] [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: 11/27/2022] Open
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Ajani J, Sharpe D, De T, Kim I, Gricar J, Kurt M. 1218P Long-term survivorship rates among chemotherapy refractory or intolerant advanced esophageal squamous cell carcinoma (aESCC) patients treated with nivolumab (NIVO). Ann Oncol 2022. [DOI: 10.1016/j.annonc.2022.07.1336] [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: 11/01/2022] Open
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Larkin J, Squifflet P, Saad E, Mohr P, Kurt M, Moshyk A, Hamilton M, Kotapati S, Buyse M. 816P Investigating surrogate endpoints (SE) for overall survival (OS) in first-line (1L) advanced melanoma: A pooled-analysis of immune checkpoint inhibitor (ICI) trials. Ann Oncol 2022. [DOI: 10.1016/j.annonc.2022.07.942] [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] Open
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Sternberg C, Squifflet P, Burdett S, Fisher D, Saad E, Kurt M, Teitsson S, May J, Stoeckle M, Torti F, Cote R, Groshen S, Ruggeri E, Zhegalik A, Tierney J, Collette L, Burzykowski T, Buyse M. 1746P Disease-free survival (DFS) and distant metastasis-free survival (DMFS) as surrogates for overall survival (OS) in adjuvant treatment of muscle-invasive bladder cancer (MIBC). Ann Oncol 2022. [DOI: 10.1016/j.annonc.2022.07.1824] [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] Open
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Alagoz O, Ajani J, Srinivasan S, Kim I, Singh P, Xiao H, Kurt M. P-56 Estimating endpoint correlation between surrogate measures and overall survival using reconstructed survival data: Case studies from adjuvant and metastatic gastric cancer trials. Ann Oncol 2022. [DOI: 10.1016/j.annonc.2022.04.146] [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] Open
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Kavvasoglu B, Akdemir SN, Kurt M. A routine but overlooked parameter for impaired glucose control: red cell distribution width. Eur Rev Med Pharmacol Sci 2022; 26:2431-2436. [PMID: 35442498 DOI: 10.26355/eurrev_202204_28477] [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: 06/14/2023]
Abstract
OBJECTIVE Red cell distribution width (RDW), an index of erythrocyte size, is recently found to be associated with inflammation and a high risk for cardiovascular disease. Hyperglycemia, the hallmark of prediabetes (PDM) and diabetes mellitus (DM), causes endothelial dysfunction and a proinflammatory state. We investigated the relationship between RDW and hs-CRP in patients with prediabetes and overt DM. PATIENTS AND METHODS A total of 155 patients were categorized into 3 groups according to the 2007 guideline for American Diabetes Association: "Type 2 DM" group (n = 45), "PDM" group (n = 60) and "Control" group (n = 50). RDW and hs-CRP levels were measured. RESULTS PDM group had higher hs-CRP and RDW levels than the control group (14.3 ± 0.84 vs. 12.7 ± 0.8, p < 0.001 for RDW; (0.91 ± 0.49 vs. 0.55 ± 0.37, p < 0.001 for hs-CRP). Similarly, when compared with the PDM, RDW and hs-CRP levels were higher in the DM group (14.8 ± 0.87 vs. 14.3 ± 0.84, p = 0.002 for RDW; 1.15 ± 0.59 vs. 0.91 ± 0.49, p = 0.03 for hs-CRP). CONCLUSIONS Prediabetes and diabetes were associated with elevated RDW levels which may be attributed to a subclinical inflammatory background.
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Affiliation(s)
- B Kavvasoglu
- Department of Cardiology, Hatay Education and Research Hospital, Hatay, Turkey.
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Triolo E, Khegai O, Ozkaya E, Rossi N, Alipour A, Fleysher L, Balchandani P, Kurt M. Design, Construction, and Implementation of a Magnetic Resonance Elastography Actuator for Research Purposes. Curr Protoc 2022; 2:e379. [PMID: 35286023 PMCID: PMC9517172 DOI: 10.1002/cpz1.379] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Magnetic resonance elastography (MRE) is a technique for determining the mechanical response of soft materials using applied harmonic deformation of the material and a motion-sensitive magnetic resonance imaging sequence. This technique can elucidate significant information about the health and development of human tissue such as liver and brain, and has been used on phantom models (e.g., agar, silicone) to determine their suitability for use as a mechanical surrogate for human tissues in experimental models. The applied harmonic deformation used in MRE is generated by an actuator, transmitted in bursts of a specified duration, and synchronized with the magnetic resonance signal excitation. These actuators are most often a pneumatic design (common for human tissues or phantoms) or a piezoelectric design (common for small animal tissues or phantoms). Here, we describe how to design and assemble both a pneumatic and a piezoelectric MRE actuator for research purposes. For each of these actuator types, we discuss displacement requirements, end-effector options and challenges, electronics and electronic-driving requirements and considerations, and full MRE implementation. We also discuss how to choose the actuator type, size, and power based on the intended material and use. © 2022 Wiley Periodicals LLC. Basic Protocol 1: Design, construction, and implementation of a convertible pneumatic MRE actuator for use with tissues and phantom models Basic Protocol 2: Design, construction, and implementation of a piezoelectric MRE actuator for localized excitation in phantom models.
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Affiliation(s)
- E.R. Triolo
- University of Washington, Dept. of Mechanical Engineering (3900 E Stevens Way NE Seattle, WA 98195)
| | - O. Khegai
- Icahn School of Medicine at Mount Sinai, BioMedical Engineering and Imaging Institute (1470 Madison Ave, New York City, NY 10029)
| | - E. Ozkaya
- Icahn School of Medicine at Mount Sinai, BioMedical Engineering and Imaging Institute (1470 Madison Ave, New York City, NY 10029)
| | - N. Rossi
- Stevens Institute of Technology, Dept. of Mechanical Engineering (1 Castle Point Terrace, Hoboken, NJ 07030)
| | - A. Alipour
- Icahn School of Medicine at Mount Sinai, BioMedical Engineering and Imaging Institute (1470 Madison Ave, New York City, NY 10029)
| | - L. Fleysher
- Icahn School of Medicine at Mount Sinai, BioMedical Engineering and Imaging Institute (1470 Madison Ave, New York City, NY 10029)
| | - P. Balchandani
- Icahn School of Medicine at Mount Sinai, BioMedical Engineering and Imaging Institute (1470 Madison Ave, New York City, NY 10029)
| | - M. Kurt
- University of Washington, Dept. of Mechanical Engineering (3900 E Stevens Way NE Seattle, WA 98195)
- Icahn School of Medicine at Mount Sinai, BioMedical Engineering and Imaging Institute (1470 Madison Ave, New York City, NY 10029)
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Branchoux S, Sofeu CL, Gaudin AF, Kurt M, Moshyk A, Italiano A, Bellera C, Rondeau V. Time to next treatment or death as a candidate surrogate endpoint for overall survival in advanced melanoma patients treated with immune checkpoint inhibitors: an insight from the phase III CheckMate 067 trial. ESMO Open 2021; 7:100340. [PMID: 34929616 PMCID: PMC8693416 DOI: 10.1016/j.esmoop.2021.100340] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [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] [Received: 03/19/2021] [Revised: 10/22/2021] [Accepted: 11/16/2021] [Indexed: 11/13/2022] Open
Abstract
Background Time to next treatment or death (TNT-D) may be a patient-relevant endpoint in patients treated with immune checkpoint inhibitors. This study investigated TNT-D as a surrogate endpoint (SE) for overall survival (OS) in previously untreated advanced melanoma patients. Methods Patient-level data from the 60-month results of the CheckMate 067 randomised, controlled trial were used. Analyses were carried out for nivolumab monotherapy or nivolumab with ipilimumab versus ipilimumab monotherapy. The SE 1-step validation method based on a joint frailty-copula model was used where the country of enrolment was applied to define clusters. Kendall’s τ and the coefficient of determination (R2trial) were estimated for respective measurements of association at the individual and cluster levels. The surrogate threshold effect, the maximum threshold hazard ratio for TNT-D that would translate into OS benefit, was estimated. A leave-one-out cross-validation analysis was carried out to evaluate model robustness. Results Fifteen clusters of data were generated from 945 patients. For both nivolumab-containing arms, the association between TNT-D and OS was deemed acceptable at the individual level (Kendall’s τ > 0.60) and strong at the cluster level, with R2trial fairly close to 1, with narrow confidence intervals. The estimated surrogate threshold effects were 0.61 for nivolumab versus ipilimumab and 0.49 for nivolimub + ipilimumab versus ipilimumab. Cross-validation results showed minimum variation of the correlation measures and satisfactory predictive accuracy for the model. Conclusion Results suggest that TNT-D may be a valuable SE in previously untreated advanced melanoma patients treated with immune checkpoint inhibitors. Surrogacy analyses considering multiple randomised controlled trials are warranted for confirming these findings. This is the first study to assess the surrogacy properties of TNT-D for OS in immune checkpoint inhibitor-treated patients. TNT-D is a clinically relevant, pragmatic and often measurable endpoint that reflects the result of a therapeutic decision. TNT-D appears to be a promising SE for OS in advanced melanoma patients treated with immune checkpoint inhibitors.
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Affiliation(s)
- S Branchoux
- Health Economics and Outcomes Research, Bristol Myers Squibb, Rueil-Malmaison, France.
| | - C L Sofeu
- Biostatistic Team, Bordeaux Population Health Center, ISPED, Centre INSERM U1219, INSERM, Bordeaux, France
| | - A-F Gaudin
- Health Economics and Outcomes Research, Bristol Myers Squibb, Rueil-Malmaison, France
| | - M Kurt
- Health Economics and Outcomes Research, Bristol Myers Squibb, Princeton, USA
| | - A Moshyk
- Health Economics and Outcomes Research, Bristol Myers Squibb, Princeton, USA
| | - A Italiano
- Department of Early Phase Trial Unit, Institut Bergonié Comprehensive Cancer Centre, Bordeaux, France
| | - C Bellera
- Epicene Team (Cancer and Environment), Bordeaux Population Health Center, ISPED, Centre INSERM U1219, INSERM, Bordeaux, France
| | - V Rondeau
- Biostatistic Team, Bordeaux Population Health Center, ISPED, Centre INSERM U1219, INSERM, Bordeaux, France
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Ozkaya E, Triolo ER, Rezayaraghi F, Abderezaei J, Meinhold W, Hong K, Alipour A, Kennedy P, Fleysher L, Ueda J, Balchandani P, Eriten M, Johnson CL, Yang Y, Kurt M. Brain-mimicking phantom for biomechanical validation of motion sensitive MR imaging techniques. J Mech Behav Biomed Mater 2021; 122:104680. [PMID: 34271404 DOI: 10.1016/j.jmbbm.2021.104680] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2021] [Revised: 05/07/2021] [Accepted: 06/30/2021] [Indexed: 10/20/2022]
Abstract
Motion sensitive MR imaging techniques allow for the non-invasive evaluation of biological tissues by using different excitation schemes, including physiological/intrinsic motions caused by cardiac pulsation or respiration, and vibrations caused by an external actuator. The mechanical biomarkers extracted through these imaging techniques have been shown to hold diagnostic value for various neurological disorders and conditions. Amplified MRI (aMRI), a cardiac gated imaging technique, can help track and quantify low frequency intrinsic motion of the brain. As for high frequency actuation, the mechanical response of brain tissue can be measured by applying external high frequency actuation in combination with a motion sensitive MR imaging sequence called Magnetic Resonance Elastography (MRE). Due to the frequency-dependent behavior of brain mechanics, there is a need to develop brain phantom models that can mimic the broadband mechanical response of the brain in order to validate motion-sensitive MR imaging techniques. Here, we have designed a novel phantom test setup that enables both the low and high frequency responses of a brain-mimicking phantom to be captured, allowing for both aMRI and MRE imaging techniques to be applied on the same phantom model. This setup combines two different vibration sources: a pneumatic actuator, for low frequency/intrinsic motion (1 Hz) for use in aMRI, and a piezoelectric actuator for high frequency actuation (30-60 Hz) for use in MRE. Our results show that in MRE experiments performed from 30 Hz through 60 Hz, propagating shear waves attenuate faster at higher driving frequencies, consistent with results in the literature. Furthermore, actuator coupling has a substantial effect on wave amplitude, with weaker coupling causing lower amplitude wave field images, specifically shown in the top-surface shear loading configuration. For intrinsic actuation, our results indicate that aMRI linearly amplifies motion up to at least an amplification factor of 9 for instances of both visible and sub-voxel motion, validated by varying power levels of pneumatic actuation (40%-80% power) under MR, and through video analysis outside the MRI scanner room. While this investigation used a homogeneous brain-mimicking phantom, our setup can be used to study the mechanics of non-homogeneous phantom configurations with bio-interfaces in the future.
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Affiliation(s)
- E Ozkaya
- Department of Mechanical Engineering, Stevens Institute of Technology, Hoboken, NJ, 07030, USA.
| | - E R Triolo
- Department of Mechanical Engineering, Stevens Institute of Technology, Hoboken, NJ, 07030, USA
| | - F Rezayaraghi
- Department of Mechanical Engineering, Stevens Institute of Technology, Hoboken, NJ, 07030, USA
| | - J Abderezaei
- Department of Mechanical Engineering, Stevens Institute of Technology, Hoboken, NJ, 07030, USA
| | - W Meinhold
- The George W. Woodruff of Mechanical Engineering, Georgia Institute of Technology, Atlanta, GA, 30332, USA
| | - K Hong
- BioMedical Engineering and Imaging Institute, Icahn School of Medicine at Mount Sinai, New York, NY, 10029, USA
| | - A Alipour
- BioMedical Engineering and Imaging Institute, Icahn School of Medicine at Mount Sinai, New York, NY, 10029, USA
| | - P Kennedy
- BioMedical Engineering and Imaging Institute, Icahn School of Medicine at Mount Sinai, New York, NY, 10029, USA
| | - L Fleysher
- BioMedical Engineering and Imaging Institute, Icahn School of Medicine at Mount Sinai, New York, NY, 10029, USA
| | - J Ueda
- The George W. Woodruff of Mechanical Engineering, Georgia Institute of Technology, Atlanta, GA, 30332, USA
| | - P Balchandani
- BioMedical Engineering and Imaging Institute, Icahn School of Medicine at Mount Sinai, New York, NY, 10029, USA
| | - M Eriten
- Department of Mechanical Engineering, University of Wisconsin-Madison, Madison, WI, 53706, USA
| | - C L Johnson
- Department of Biomedical Engineering, University of Deleware, Newark, DE, 19716, USA
| | - Y Yang
- BioMedical Engineering and Imaging Institute, Icahn School of Medicine at Mount Sinai, New York, NY, 10029, USA
| | - M Kurt
- Department of Mechanical Engineering, Stevens Institute of Technology, Hoboken, NJ, 07030, USA; BioMedical Engineering and Imaging Institute, Icahn School of Medicine at Mount Sinai, New York, NY, 10029, USA
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Abstract
The colorectal cancer is a serious health problem. The diagnosis of the disease mostly relies on an invasive procedure. A non-invasive diagnostic test such as an immunoassay, may facilitate diagnosis of colorectal cancer. The purpose of the study was to evaluate the use of antibodies against Fusobacterium nucleatum in the diagnosis of colorectal cancer (CRC). Totally 78 patients in three groups were included in the study. F. nucleatum in the tissues was detected using quantitative polymerase chain reaction assay. F. nucleatum IgA and IgG were measured using enzyme linked immunosorbent assay. F. nucleatum was detected in 86.7% and 73.1% cases of CRC and precancerous-benign colon disease (P-BCD), respectively. The OD values from F. nucleatum IgA and IgG ELISA tests were higher in CRC group compared with healthy individuals. The sensitivity of IgA ELISA test varied between 31.8 and 95.5% depending on the chosen cut-off values. The positivity rate of antibodies in patients with high amount of F. nucleatum in tissue was significantly greater than in the negative group. The F. nucleatum IgA and IgG antibodies in CRC were higher than the ones in healthy controls but the discriminative ability of the ELISA test was not adequate to be considered as a diagnostic tool.
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Affiliation(s)
- Melike Kurt
- Department of Medical Microbiology, Kocaeli University Faculty of Medicine, 41380, Kocaeli, Turkey
| | - Zeki Yumuk
- Department of Medical Microbiology, Kocaeli University Faculty of Medicine, 41380, Kocaeli, Turkey.
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Tanış E, Kurt M, Yalçın S, Ercan F. Conformational, Structural, Vibrational, Electronic, and Molecular Docking Studies of 3-Formylphenylboronic Acid and 4-Formylphenylboronic Acid: A Comparative Study. Russ J Phys Chem 2020. [DOI: 10.1134/s0036024420130282] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Kurt M, Eslam Panah A, Moored KW. Flow Interactions Between Low Aspect Ratio Hydrofoils in In-line and Staggered Arrangements. Biomimetics (Basel) 2020; 5:biomimetics5020013. [PMID: 32244490 PMCID: PMC7344404 DOI: 10.3390/biomimetics5020013] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [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] [Received: 02/15/2020] [Revised: 03/21/2020] [Accepted: 03/25/2020] [Indexed: 12/04/2022] Open
Abstract
Many species of fish gather in dense collectives or schools where there are significant flow interactions from their shed wakes. Commonly, these swimmers shed a classic reverse von Kármán wake, however, schooling eels produce a bifurcated wake topology with two vortex rings shed per oscillation cycle. To examine the schooling interactions of a hydrofoil with a bifurcated wake topology, we present tomographic particle image velocimetry (tomo PIV) measurements of the flow interactions and direct force measurements of the performance of two low-aspect-ratio hydrofoils (AR=0.5) in an in-line and a staggered arrangement. Surprisingly, when the leader and follower are interacting in either arrangement there are only minor alterations to the flowfields beyond the superposition of the flowfields produced by the isolated leader and follower. Motivated by this finding, Garrick’s linear theory, a linear unsteady hydrofoil theory based on a potential flow assumption, was adapted to predict the lift and thrust performance of the follower. Here, the follower hydrofoil interacting with the leader’s wake is considered as the superposition of an isolated pitching foil with a time-varying cross-stream velocity derived from the wake flow measurements of the isolated leader. Linear theory predictions accurately capture the time-averaged lift force and some of the major peaks in thrust derived from the follower interacting with the leader’s wake in a staggered arrangement. The thrust peaks that are not predicted by linear theory are likely driven by spatial variations in the flowfield acting on the follower or nonlinear flow interactions; neither of which are accounted for in the simple theory. This suggests that unsteady potential flow theory that does account for spatial variations in the flowfield acting on a hydrofoil can provide a relatively simple framework to understand and model the flow interactions that occur in schooling fish. Additionally, schooling eels can derive thrust and efficiency increases of 63-80% in either a in-line or a staggered arrangement where the follower is between two branched momentum jets or with one momentum jet branch directly impinging on it, respectively.
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Affiliation(s)
- Melike Kurt
- Mechanical Engineering and Mechanics, Lehigh University, Bethlehem, PA 18015, USA;
- Correspondence:
| | - Azar Eslam Panah
- Mechanical Engineering, Division of Engineering, Business and Computing, Pennsylvania State University at Berks, Reading, PA 19610, USA;
| | - Keith W. Moored
- Mechanical Engineering and Mechanics, Lehigh University, Bethlehem, PA 18015, USA;
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Terzi C, Bingul M, Arslan NC, Ozturk E, Canda AE, Isik O, Yilmazlar T, Obuz F, Birkay Gorken I, Kurt M, Unlu M, Ugras N, Kanat O, Oztop I. Randomized controlled trial of 8 weeks' vs 12 weeks' interval between neoadjuvant chemoradiotherapy and surgery for locally advanced rectal cancer. Colorectal Dis 2020; 22:279-288. [PMID: 31566843 DOI: 10.1111/codi.14867] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/13/2019] [Accepted: 08/14/2019] [Indexed: 12/12/2022]
Abstract
AIM The aim was to compare the pathological complete response (pCR) rate at 8 compared to 12 weeks' interval between completion of neoadjuvant chemoradiotherapy (CRT) and surgery in patients with locally advanced rectal cancer. METHOD This was a randomized trial which included a total of 330 patients from two institutions. Patients with locally advanced (T3-4N0M0, TxN+M0) rectal cancer were randomized into 8- and 12-week interval groups. All the patients received long-course CRT (45 Gy in 1.8 Gy fractions and concomitant oral capecitabine or 5-fluorouracil infusion). Surgery was performed at either 8 or 12 weeks after CRT. The primary end-point was pCR. Secondary end-points were sphincter preservation, postoperative morbidity and mortality. RESULTS Two-hundred and fifty-two patients (n = 125 in the 8-week group, n = 127 in the 12-week group) were included. Demographic and clinical characteristics were similar between groups. The overall pCR rate was 17.9% (n = 45): 12% (n = 15) in the 8-week group and 23.6% (n = 30) in the 12-week group (P = 0.021). Sphincter-preserving surgery was performed in 107 (85.6%) patients which was significantly higher than the 94 (74%) patients in the 12-week group (P = 0.016). Postoperative mortality was seen in three (1.2%) patients overall and was not different between groups (1.6% in 8 weeks vs 0.8% in 12 weeks, P = 0.494). Groups were similar in anastomotic leak (10.8% in 8 weeks vs 4.5% in 12 weeks, P = 0.088) and morbidity (30.4% in 8 weeks and 20.1% in 12 weeks, P = 0.083). CONCLUSION Extending the interval between CRT and surgery from 8 to 12 weeks resulted in a 2-fold increase in pCR rate without any difference in mortality and morbidity.
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Affiliation(s)
- C Terzi
- Department of General Surgery, Dokuz Eylul University, Izmir, Turkey
| | - M Bingul
- Department of General Surgery, Dokuz Eylul University, Izmir, Turkey
| | - N C Arslan
- Department of General Surgery, Medipol University, Istanbul, Turkey
| | - E Ozturk
- Department of General Surgery, Uludag University Hospital, Bursa, Turkey
| | - A E Canda
- Department of General Surgery, Dokuz Eylul University, Izmir, Turkey
| | - O Isik
- Department of General Surgery, Uludag University Hospital, Bursa, Turkey
| | - T Yilmazlar
- Department of General Surgery, Uludag University Hospital, Bursa, Turkey
| | - F Obuz
- Department of Radiology, Dokuz Eylul University, Izmir, Turkey
| | - I Birkay Gorken
- Department of Radiation Oncology, Dokuz Eylul University, Izmir, Turkey
| | - M Kurt
- Department of Radiation Oncology, Uludag University Hospital, Bursa, Turkey
| | - M Unlu
- Department of Pathology, Dokuz Eylul University, Izmir, Turkey
| | - N Ugras
- Department of Pathology, Uludag University Hospital, Bursa, Turkey
| | - O Kanat
- Department of Medical Oncology, Uludag University Hospital, Bursa, Turkey
| | - I Oztop
- Department of Medical Oncology, Dokuz Eylul University, Izmir, Turkey
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Sas E, Yalcin S, Ercan F, Kurt M. A multi-spectroscopic, computational and molecular modeling studies on anti-apoptotic proteins with Boc-D-Lys-OH. J Mol Struct 2020. [DOI: 10.1016/j.molstruc.2019.126981] [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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Weber J, Kurt M, Edmondson-Jones M, Amadi A, Lobo M, Moshyk A, Kotapati S, Mohr P. Mixture-cure modeling for resected stage III/IV melanoma in the phase III CheckMate 238 trial. Ann Oncol 2019. [DOI: 10.1093/annonc/mdz255.020] [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: 11/13/2022] Open
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Akmansu M, Kilic D, Akyurek S, Akboru H, Arican Alicikus L, Yalman D, Yazici O, Keven E, Atalar B, Yurut Caloglu V, Gursel S, Kurt M, Igdem M, Kaytan Saglam E. MON-PO380: Screening for Nutritional Status in Radiation Oncology Outpatients. Clin Nutr 2019. [DOI: 10.1016/s0261-5614(19)32214-9] [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: 10/26/2022]
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Abstract
Aim The aim of this research was to investigate the effect of microwave glazing, conventional oven glazing, and polishing on surface roughness and wettability of porcelains. Materials and Methods The initial surface roughness values (Ra0) of the prepared specimens for four different porcelains (Vita VM 9, VitaVM 13, Vita VMK 95, IPS e.maxCeram) were determined by profilometry. Then, the specimens were divided randomly into three groups as polishing, conventional oven glazing, and microwave glazing. Final surface roughness values were evaluated by profilometry (Ra1) and scanning electron microscopy. Wettability of glazed specimens were evaluated by contact angle goniometer. Results Although microwave-glazed specimens had lower Ra1 values compared with the conventional oven-glazed ones for IPS e.maxCeram (P < 0.05), there were not any statistically significant differences between these two procedures in terms of Ra1 values for the other porcelains (P > 0.05). Microwave-glazed specimens had lower wettability values than conventional oven-glazed ones for Vita VM 9. Conclusions Microwave glazing procedure may be considered as an alternative method because of the advantages of providing volumetric heating, time, and energy saving.
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Affiliation(s)
- F A Sanal
- Department of Prosthetic Dentistry, Faculty of Dentistry, Bolu Abant Izzet Baysal University, Bolu, Turkey
| | - M Kurt
- Ondokuz Mayis University, Faculty of Dentistry, Department of Prosthetic Dentistry, Samsun, Turkey
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Kurt M, Yurtseven H, Kurt A. Calculation of the Raman and IR frequencies as order parameters and the damping constant (FWHM) close to phase transitions in methylhydrazinium structures. J Mol Struct 2019. [DOI: 10.1016/j.molstruc.2019.01.016] [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: 11/30/2022]
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Sonel Tur B, Kurt M, Özmen D, Küçükdeveci A. Comparison of participation and health-related quality of life between persons with neurological and rheumatic diseases. Ann Phys Rehabil Med 2018. [DOI: 10.1016/j.rehab.2018.05.268] [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: 11/17/2022]
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Sas E, Cankaya N, Kurt M. Synthesis of 2-(bis(cyanomethyl)amino)-2-oxoethyl methacrylate monomer molecule and its characterization by experimental and theoretical methods. J Mol Struct 2018. [DOI: 10.1016/j.molstruc.2018.01.088] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Kurt M, Moored KW. Flow interactions of two- and three-dimensional networked bio-inspired control elements in an in-line arrangement. Bioinspir Biomim 2018; 13:045002. [PMID: 29671409 DOI: 10.1088/1748-3190/aabf4c] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
We present experiments that examine the modes of interaction, the collective performance and the role of three-dimensionality in two pitching propulsors in an in-line arrangement. Both two-dimensional foils and three-dimensional rectangular wings of AR = 2 are examined. In contrast to previous work, two interaction modes distinguished as the coherent and branched wake modes are not observed to be directly linked to the propulsive efficiency, although they are linked to peak thrust performance and minimum power consumption as previously described (Boschitsch et al 2014 Phys. Fluids 26 051901). In fact, in closely-spaced propulsors peak propulsive efficiency of the follower occurs near its minimum power and this condition reveals a branched wake mode. Alternatively, for propulsors spaced far apart peak propulsive efficiency of the follower occurs near its peak thrust and this condition reveals a coherent wake mode. By examining the collective performance, it is discovered that there is an optimal spacing between the propulsors to maximize the collective efficiency. For two-dimensional foils the optimal spacing of X * = 0.75 and the synchrony of ϕ = 2π / 3 leads to a collective efficiency and thrust enhancement of 42% and 38%, respectively, as compared to two isolated foils. In comparison, for AR = 2 wings the optimal spacing of X * = 0.25 and the synchrony of ϕ = 7 π / 6 leads to a collective efficiency and thrust enhancement of 25% and 15%, respectively. In addition, at the optimal conditions the collective lateral force coefficients in both the two- and three-dimensional cases are negligible, while operating off these conditions can lead to non-negligible lateral forces. Finally, the peak efficiency of the collective and the follower are shown to have opposite trends with increasing spacing in two- and three-dimensional flows. This is correlated to the breakdown of the impinging vortex on the follower wing in three-dimensions. These results can aid in the design of networked bio-inspired control elements that through integrated sensing can synchronize to three-dimensional flow interactions.
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Affiliation(s)
- Melike Kurt
- Mechanical Engineering and Mechanics, Lehigh University, Bethlehem, PA 18015, United States of America
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Scholaske L, Lindner-Matthes D, Kurt M, Duman E, Sahbaz C, Spallek J, Entringer S. 1.11-P20Intergenerational transmission of health disparities among Turkish-origin residents in Germany: role of maternal stress and stress biology during pregnancy. A study protocol. Eur J Public Health 2018. [DOI: 10.1093/eurpub/cky048.044] [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: 11/14/2022] Open
Affiliation(s)
- L Scholaske
- Charité – Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health (BIH), Institute of Psychological Medicine, Germany
| | - D Lindner-Matthes
- Department of Public Health, Brandenburg University of Technology Cottbus-Senftenberg, Germany
| | - M Kurt
- School of Public Health, Bielefeld University, Germany
| | - E Duman
- Department of Psychology, Bogazici University, Turkey
| | - C Sahbaz
- Department of Psychiatry, Bezmialem University, Turkey
| | - J Spallek
- Department of Public Health, Brandenburg University of Technology Cottbus-Senftenberg, Germany
| | - S Entringer
- Charité – Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health (BIH), Institute of Psychological Medicine, Germany
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Weickenmeier J, Kurt M, Ozkaya E, de Rooij R, Ovaert TC, Ehman RL, Butts Pauly K, Kuhl E. Brain stiffens post mortem. J Mech Behav Biomed Mater 2018; 84:88-98. [PMID: 29754046 PMCID: PMC6751406 DOI: 10.1016/j.jmbbm.2018.04.009] [Citation(s) in RCA: 51] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2018] [Revised: 04/08/2018] [Accepted: 04/10/2018] [Indexed: 12/19/2022]
Abstract
Alterations in brain rheology are increasingly recognized as a diagnostic marker for various neurological conditions. Magnetic resonance elastography now allows us to assess brain rheology repeatably, reproducibly, and non-invasively in vivo. Recent elastography studies suggest that brain stiffness decreases one percent per year during normal aging, and is significantly reduced in Alzheimer’s disease and multiple sclerosis. While existing studies successfully compare brain stiffnesses across different populations, they fail to provide insight into changes within the same brain. Here we characterize rheological alterations in one and the same brain under extreme metabolic changes: alive and dead. Strikingly, the storage and loss moduli of the cerebrum increased by 26% and 60% within only three minutes post mortem and continued to increase by 40% and 103% within 45 minutes. Immediate post mortem stiffening displayed pronounced regional variations; it was largest in the corpus callosum and smallest in the brainstem. We postulate that post mortem stiffening is a manifestation of alterations in polarization, oxidation, perfusion, and metabolism immediately after death. Our results suggest that the stiffness of our brain–unlike any other organ–is a dynamic property that is highly sensitive to the metabolic environment Our findings emphasize the importance of characterizing brain tissue in vivo and question the relevance of ex vivo brain tissue testing as a whole. Knowing the true stiffness of the living brain has important consequences in diagnosing neurological conditions, planning neurosurgical procedures, and modeling the brain’s response to high impact loading.
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Affiliation(s)
- J Weickenmeier
- Department of Mechanical Engineering, Stanford University, Stanford, CA 94305, USA; Department of Mechanical Engineering, Stevens Institute of Technology, Hoboken, NJ 07030, USA
| | - M Kurt
- Department of Mechanical Engineering, Stevens Institute of Technology, Hoboken, NJ 07030, USA
| | - E Ozkaya
- Department of Mechanical Engineering, Stevens Institute of Technology, Hoboken, NJ 07030, USA
| | - R de Rooij
- Department of Mechanical Engineering, Stanford University, Stanford, CA 94305, USA
| | - T C Ovaert
- Department of Aerospace and Mechanical Engineering, University of Notre Dame, Notre Dame, IN 46556, USA
| | - R L Ehman
- Department of Radiology, Mayo Clinic, Rochester, MN 55905, USA
| | - K Butts Pauly
- Department of Radiology Stanford University Stanford, CA 94305, USA
| | - E Kuhl
- Department of Mechanical Engineering, Stanford University, Stanford, CA 94305, USA.
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Ozyalvacli G, Kucukbayrak A, Kurt M, Gurel K, Gunes O, Ustun C, Akdeniz H. Non-invasive fibrosis tests are correlated with necroinflammatory actvity of liver in patients with chronic hepatitis B. Clin Ter 2016; 165:e199-204. [PMID: 24999574 DOI: 10.7417/ct.2014.1719] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
BACKGROUND The gold standarda method used for assessing necroinflammatory activity and fibrosis in the liver is a liver biopsy which has many disadvantages. Therefore, many investigators have been trying to develop non-invasive tests for predicting liver fibrosis score (LFS) of these patients. The aim of this study is to describe the relationship between certain non-invasive fibrosis markers with LFS and histological activity index (HAI) detected histopathologically by liver biopsy in chronic hepatitis B patients. MATERIALS AND METHODS A total of 54 patients who had undergone a liver biopsy with the diagnosis of chronic HBV infection were included in the study. Ishak scoring was used for the evaluation of liver fibrosis, and a modified Knodell HAI was used for demonstration of necroinflammation. In this study, non-invasive fibrosis tests were calculated as described in previous studies. RESULTS Histological acitivity index was positively correlated with age, age/platelet index, cirrhosis discriminant score (CDS), AST/platelet ratio index (APRI), AST/platelet/GGT/AFP index (APGA), fibro-quotient (Fibro-Q), Goteburg University Cirrhosis Index (Guci), and Platelet/Age/Phosphatase/AFP/AST index (PAPAS). When divided into two groups according to HAI, Guci and APGA were found significantly different both in >4 and >4 HAI groups than the other group. In ROC analysis performed for LFS; PAPAS, APGA, FFI and APRI were the markers having the highest AUC levels, and in ROC analysis performed for HAI; Guci, APRI and APGA were the markers with the highest AUC levels. CONCLUSIONS APRI, APGA and GUCI tests may be helpful in prediction of necroinflammatory scores in the liver.
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Affiliation(s)
- G Ozyalvacli
- Departments of Pathology, Abant Izzet Baysal University Medical Faculty, Bolu, Turkey
| | - A Kucukbayrak
- Departments of Infectious Diseases, Abant Izzet Baysal University Medical Faculty, Bolu, Turkey
| | - M Kurt
- Departments of Gastroenterology, Abant Izzet Baysal University Medical Faculty, Bolu, Turkey
| | - K Gurel
- Departments of Radiology, Abant Izzet Baysal University Medical Faculty, Bolu, Turkey
| | - O Gunes
- Departments of Infectious Diseases, Abant Izzet Baysal University Medical Faculty, Bolu, Turkey
| | - C Ustun
- Departments of Infectious Diseases, Abant Izzet Baysal University Medical Faculty, Bolu, Turkey
| | - H Akdeniz
- Departments of Infectious Diseases, Abant Izzet Baysal University Medical Faculty, Bolu, Turkey
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Akpolat C, Kurt M, Cekic O. Alterations of retinal vessel size after single injection of intravitreal anti-VEGF for diabetic macular edema. Acta Ophthalmol 2016. [DOI: 10.1111/j.1755-3768.2016.0401] [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: 11/27/2022]
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Akpolat C, Kurt M, Cekic O. Vessel diameter study: intravitreal versus posterior subtenon triamcinolone acetonide injection for diabetic macular edema. Acta Ophthalmol 2016. [DOI: 10.1111/j.1755-3768.2016.0403] [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: 12/01/2022]
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Yilmaz B, Can G, Ucmak F, Arslan AO, Solmaz I, Unlu O, Düzenli S, Korkmaz U, Kurt M, Senates E. Polymorphisms in the IL28B gene (rs12979860, rs8099917) and the virological response to pegylated interferon therapy in hepatitis D virus patients. Acta Gastroenterol Belg 2016; 79:206-10. [PMID: 27382939] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
AIM Few data are available regarding the effects of interleukin 28B (IL28B) polymorphisms in chronic hepatitis D (CHD) patients. This study investigated the relationship between IL28B poly-morphisms and the response of patients with CHD infections to pegylated interferon (PEG-IFN) therapy. MATERIALS AND METHODS A total of 101 CHD patients were -selected, 80 of whom (46 males ; median age 41 years) satisfied the inclusion criteria and were enrolled in the study. Thirty-seven patients were treated with peg-IFNα for at least 12 months and were followed for a median of 18 months (range, 12-30 months). The primary treatment endpoint was the suppression of HDV replication, as documented by the loss of detectable HDV RNA in serum. Genotyping was used to analyse the IL28B polymorphisms rs12979860 and rs8099917 according to the virological response. RESULTS After treatment, a sustained viral response (SVR) was achieved in 19 (51%) of the patients treated with PEG-INF. The IL28B genotypes in the 80 patients were as follows : CC in 36 (45%), CT in 33 (41%) and TT in 11 (14%) for rs12979860, and GG in 4 (5%), GT in 27 (34%) and TT in 49 (61%) for rs8099917. SVR was achieved in 5 (26%), 10 (53%) and 4 (21%) patients with CC, CT and TT at rs12979860, respectively, and one (5%), nine (47%) and nine (47%) patients with GG, GT and TT at rs8099917, respectively. There were differences in the SVR among genotypes (rs12979860 and rs8099917 ; chi-squared test, p = 0.047). CONCLUSION IL28B predicts the PEG-IFN response in patients with CHD infection.
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Demir M, Kurt M, Akçay AB. Fragmented QRS is associated with cirrhotic cardiomyopathy in patients with decompensated cirrhosis. Acta Gastroenterol Belg 2016; 79:191-196. [PMID: 27382936] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
BACKGROUND AND AIM It has been reported that the fragmented QRS (fQRS) is related to left ventricular systolic dysfunction and diastolic dysfunction. The aim of this study was to determine the frequency of fragmented QRS (fQRS) in patients with decompensated cirrhosis and to evaluate the relationship between the presence of fQRS and systolic and diastolic dysfunction. METHOD PThe study included consecutive 189 patients with decompensated cirrhosis. fQRS pattern was described as presence of RSR' manifested as existence of additional R wave and notching in either R or S waves in ECG recordings. Conventional echocardiography and tissue doppler echocardiography were performed in all patients. RESULTS The prevalence of fQRS was 31% (59/189) in patients with decompensated cirrhosis. The patients with fQRS had worse diastolic and systolic functions in comparison to the patients without fQRS. In addition, multivariate analysis revealed that the presence of an fQRS, Na levels < 125 mEq/L, the Child-Pugh score and the MELD score were independent predictive factors for mortality (respectively, p < 0.001, p < 0.001, p < 0.001 and p < 0.001). CONCLUSIONS In conclusion,this study showed a relationship between the presence of an fQRS and cardiac dysfunction. In addition, the fQRS appeared to act as an independent predictor of mortality in patients with decompensated cirrhosis. These data suggest that the fQRS may represent a novel noninvasive marker for cardiac involvement and for predicting mortality in patients with decompensated cirrhosis.
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Kurt M, Sas EB, Can M, Okur S, Icli S, Demic S, Karabacak M, Jayavarthanan T, Sundaraganesan N. Synthesis and spectroscopic characterization on 4-(2,5-di-2-thienyl-1H-pyrrol-1-yl) benzoic acid: A DFT approach. Spectrochim Acta A Mol Biomol Spectrosc 2016; 152:8-17. [PMID: 26186392 DOI: 10.1016/j.saa.2015.07.058] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/01/2014] [Revised: 07/08/2015] [Accepted: 07/09/2015] [Indexed: 06/04/2023]
Abstract
A complete structural and vibrational analysis of the 4-(2,5-di-2-thienyl-1H-pyrrol-1-yl) benzoic acid (TPBA), was carried out by ab initio calculations, at the density functional theory (DFT) method. Molecular geometry, vibrational wavenumbers and gauge including atomic orbital (GIAO) (13)C NMR and (1)H NMR chemical shift values of (TPBA), in the ground state have been calculated by using ab initio density functional theory (DFT/B3LYP) method with 6-311G(d,p) as basis set for the first time. Comparison of the observed fundamental vibrational modes of (TPBA) and calculated results by DFT/B3LYP method indicates that B3LYP level of theory giving yield good results for quantum chemical studies. Vibrational wavenumbers obtained by the DFT/B3LYP method are in good agreement with the experimental data. The study was complemented with a natural bond orbital (NBO) analysis, to evaluate the significance of hyperconjugative interactions and electrostatic effects on such molecular structure. By using TD-DFT method, electronic absorption spectra of the title compound have been predicted and a good agreement with the TD-DFT method and the experimental one is determined. In addition, the molecular electrostatic potential (MEP), frontier molecular orbitals analysis and thermodynamic properties of TPBA were investigated using theoretical calculations.
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Affiliation(s)
- M Kurt
- Department of Physics, Ahi Evran University, Kırsehir, Turkey
| | - E Babur Sas
- Department of Physics, Ahi Evran University, Kırsehir, Turkey
| | - M Can
- Department of Engineering Sciences, Faculty of Engineering, Izmir Katip Celebi University, Cigli, 35620 Izmir, Turkey
| | - S Okur
- Izmir Katip Celebi University, Material Science and Engineering, Cigli, Izmir, Turkey
| | - S Icli
- Ege University, Solar Energy Institute, 35040 Bornova, Izmir, Turkey
| | - S Demic
- Izmir Katip Celebi University, Material Science and Engineering, Cigli, Izmir, Turkey
| | - M Karabacak
- Department of Mechatronics Engineering, H.F.T. Technology Faculty, Celal Bayar University, Turgutlu, Manisa, Turkey
| | - T Jayavarthanan
- Department of Physics (Science and Humanities), Sri Manakula Vinayagar Engg. College, Madagadipet, Puducherry 605107, India
| | - N Sundaraganesan
- Department of Physics (Engg.), Annamalai University, Annamalai Nagar 608 002, Tamil Nadu, India.
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Yilmaz B, Koklu S, Buyukbayram H, Yalçin K, Korkmaz U, Posul E, Can G, Kurt M. Chronic hepatitis B associated with hepatic steatosis, insulin resistance, necroinflammation and fibrosis. Afr Health Sci 2015; 15:714-8. [PMID: 26957957 DOI: 10.4314/ahs.v15i3.3] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
BACKGROUND The effect of hepatitis B virus (HBV) infection on fatty liver disease is unclear. OBJECTIVES The aim of this study was to investigate the viral and host causes of fatty liver in chronic hepatitis B (CHB) patients. This study included 88 CHB patients of which 17 were not treated. Liver biopsy was performed in each patient. Group 1 included those with hepatic steatosis (n=28) and group 2 those without hepatic steatosis. The groups were compared in terms of age, body mass index (BMI), Homeostasis Model Assessment- Insulin Resistance (HOMA-IR), viral load, biochemical parameters and histological findings. Patients in group 1 were subdivided according to the degree of steatosis as follows: grade 1 (15 patients, 53.6%), grade 2 (6 patients, 21.4%), and grade 3 (7 patients, 25%). RESULTS In group 1 (n=28), mean age, BMI, cholesterol, and HOMA-IR were found to be significantly higher than in group 2 (n=60). There were no significant differences in the positivity of viral load, HbeAg, treatment, fibrosis and other laboratory parameters between the two groups. HOMA-IR was the only independent predictive factor of liver steatosis in patients with CHB in logistic regression analysis. CONCLUSION Hepatic steatosis in CHB patients was associated with host metabolic factors.
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Sas EB, Kose E, Kurt M, Karabacak M. FT-IR, FT-Raman, NMR and UV-Vis spectra and DFT calculations of 5-bromo-2-ethoxyphenylboronic acid (monomer and dimer structures). Spectrochim Acta A Mol Biomol Spectrosc 2015; 137:1315-1333. [PMID: 25305625 DOI: 10.1016/j.saa.2014.08.049] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/12/2014] [Revised: 08/19/2014] [Accepted: 08/24/2014] [Indexed: 06/04/2023]
Abstract
In this study, the Fourier Transform Infrared (FT-IR) and Fourier Transform Raman (FT-Raman) spectra of 5-bromo-2-ethoxyphenylboronic acid (5Br2EPBA) are recorded in the solid phase in the region 4000-400 cm(-1) and 3500-10 cm(-1), respectively. The (1)H, (13)C and DEPT nuclear magnetic resonance (NMR) spectra are recorded in DMSO solution. The UV-Vis absorption spectrum of 5Br2EPBA is saved in the range of 200-400 nm in ethanol and water. The following theoretical calculations for monomeric and dimeric structures are supported by experimental results. The molecular geometry and vibrational frequencies in the ground state are calculated by using DFT methods with 6-31G(d,p) and 6-311G(d,p) basis sets. There are four conformers for the present molecule. The computational results diagnose the most stable conformer of 5Br2EPBA as Trans-Cis (TC) form. The complete assignments are performed on the basis of the total energy distribution (TED) of vibrational modes, calculated with scaled quantum mechanics (SQM) method in parallel quantum solutions (PQS) program. The (1)H and (13)C NMR chemical shifts of 5Br2EPBA molecule are calculated by using the Gauge Invariant Atomic Orbital (GIAO) method in DMSO and gas phase for monomer and dimer structures of the most stable conformer. Moreover, electronic properties, such as the HOMO and LUMO energies (by TD-DFT and CIS methods) and molecular electrostatic potential surface (MEPs) are investigated. Stability of the molecule arising from hyper-conjugative interactions, charge delocalization is analyzed using natural bond orbital (NBO) analysis. Nonlinear optical (NLO) properties and thermodynamic features are presented. All calculated results are compared with the experimental data of the title molecule. The correlation of theoretical and experimental results provides a detailed description of the structural and physicochemical properties of the title molecule.
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Affiliation(s)
- E B Sas
- Department of Physics, Ahi Evran University, Kırsehir, Turkey
| | - E Kose
- Department of Physics, Celal Bayar University, Manisa, Turkey
| | - M Kurt
- Department of Physics, Ahi Evran University, Kırsehir, Turkey.
| | - M Karabacak
- Department of Mechatronics Engineering, H.F.T. Technology Faculty, Celal Bayar University, Turgutlu, Manisa, Turkey
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Karabacak M, Kose E, Sas EB, Kurt M, Asiri AM, Atac A. DFT calculations and experimental FT-IR, FT-Raman, NMR, UV-Vis spectral studies of 3-fluorophenylboronic acid. Spectrochim Acta A Mol Biomol Spectrosc 2015; 136 Pt B:306-320. [PMID: 25448934 DOI: 10.1016/j.saa.2014.08.141] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/10/2014] [Revised: 08/11/2014] [Accepted: 08/31/2014] [Indexed: 06/04/2023]
Abstract
The spectroscopic (FT-IR, FT-Raman, (1)H and (13)C NMR, UV-Vis), structural, electronic and thermodynamical properties of 3-fluorophenylboronic acid (C6H4FB(OH)2), 3FPBA) were submitted by using both experimental techniques and theoretical methods (quantum chemical calculations) in this work. The experimental infrared and Raman spectra were obtained in the region 4000-400 cm(-1) and 3500-10 cm(-1), respectively. The equilibrium geometry and vibrational spectra were calculated by using DFT (B3LYP) with 6-311++G(d,p) basis set. The vibrational wavenumbers were also corrected with scale factor to take better results for the calculated data. The total energy distributions (TED) of the vibrational modes were performed for the assignments of the title molecule by using scaled quantum mechanics (SQM) method. The NMR chemical shifts ((1)H and (13)C) were recorded in DMSO solution. The (1)H and (13)C NMR spectra were computed by using the gauge-invariant atomic orbital (GIAO) method, showing a good agreement with the experimental ones. The last one UV-Vis absorption spectra were analyzed in two solvents (ethanol and water), saved in the range of 200-400 nm. In addition these, HOMO and LUMO energies, the excitation energies, density of states (DOS) diagrams, thermodynamical properties and molecular electrostatic potential surface (MEPs) were presented. Nonlinear optical (NLO) properties and thermodynamic features were performed. The experimental results are combined with the theoretical calculations using DFT calculations to fortification of the paper. At the end of this work, the results were proved our paper had been indispensable for the literature backing.
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Affiliation(s)
- M Karabacak
- Department of Mechatronics Engineering, H.F.T. Technology Faculty, Celal Bayar University, Turgutlu, Manisa, Turkey
| | - E Kose
- Department of Physics, Celal Bayar University, Manisa, Turkey.
| | - E B Sas
- Department of Physics, Ahi Evran University, Kırsehir, Turkey
| | - M Kurt
- Department of Physics, Ahi Evran University, Kırsehir, Turkey
| | - A M Asiri
- Department of Chemistry, Faculty of Science, King Abdulaziz University, Jeddah, Saudi Arabia; Center of Excellence for Advanced Materials Research, King Abdulaziz University, Jeddah, Saudi Arabia
| | - A Atac
- Department of Physics, Celal Bayar University, Manisa, Turkey
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Sas E, Kurt M, Karabacak M, Poiyamozhi A, Sundaraganesan N. FT-IR, FT-Raman, dispersive Raman, NMR spectroscopic studies and NBO analysis of 2-Bromo-1H-Benzimidazol by density functional method. J Mol Struct 2015. [DOI: 10.1016/j.molstruc.2014.10.025] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [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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Saş EB, Kurt M, Can M, Okur S, İçli S, Demiç S. Structural investigation of a self-assembled monolayer material 5-[(3-methylphenyl) (phenyl) amino] isophthalic acid for organic light-emitting devices. Spectrochim Acta A Mol Biomol Spectrosc 2014; 133:307-317. [PMID: 24954755 DOI: 10.1016/j.saa.2014.05.021] [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] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/12/2014] [Revised: 05/01/2014] [Accepted: 05/09/2014] [Indexed: 06/03/2023]
Abstract
The molecular structure and vibrations of 5-[(3-methylphenyl) (phenyl) amino] isophthalic acid (MePIFA) were investigated by infrared and Raman spectroscopies, UV-Vis, (1)H and (13)C NMR spectroscopic techniques and NBO analysis. FT-IR, FT-Raman and dispersive Raman spectra were recorded in the solid phase. (1)H and (13)C NMR spectra and UV-Vis spectrum were recorded in DMSO solution. HOMO-LUMO analysis and molecular electrostatic potential (MEP) analysis were performed. The theoretical calculations for the molecular structure and spectroscopies were performed with DFT (B3LYP) and 6-311G(d,p) basis set calculations using the Gaussian 09 program. After the geometry of the molecule was optimized, vibration wavenumbers and fundamental vibration wavenumbers were assigned on the basis of the potential energy distribution (PED) of the vibrational modes calculated with VEDA 4 program. The total (TDOS), partial (PDOS) density of state and overlap population density of state (OPDOS) diagrams analysis were made using GaussSum 2.2 program. The results of theoretical calculations for the spectra of the title compound were compared with the observed spectra.
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Affiliation(s)
- E Babur Saş
- Department of Physics, Ahi Evran University, Kırsehir, Turkey
| | - M Kurt
- Department of Physics, Ahi Evran University, Kırsehir, Turkey.
| | - M Can
- Department of Engineering Sciences, Faculty of Engineering, Izmir Katip Celebi University, Cigli, 35620 Izmir, Turkey
| | - S Okur
- Izmir Katip Çelebi University, Material Science and Engineering, Çiğli, Izmir, Turkey
| | - S İçli
- Ege University, Solar Energy Institute, 35040 Bornova, Izmir, Turkey
| | - S Demiç
- Izmir Katip Çelebi University, Material Science and Engineering, Çiğli, Izmir, Turkey
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Karabacak M, Kose E, Atac A, Sas E, Asiri A, Kurt M. Experimental (FT-IR, FT-Raman, UV–Vis, 1H and 13CNMR) and computational (density functional theory) studies on 3-bromophenylboronic acid. J Mol Struct 2014. [DOI: 10.1016/j.molstruc.2014.07.058] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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41
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Kart HH, Ozdemir Kart S, Karakuş M, Kurt M. Ab initio/DFT calculations of butyl ammonium salt of O,O'-dibornyl dithiophosphate. Spectrochim Acta A Mol Biomol Spectrosc 2014; 129:421-428. [PMID: 24747929 DOI: 10.1016/j.saa.2014.03.076] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/07/2014] [Revised: 03/05/2014] [Accepted: 03/23/2014] [Indexed: 06/03/2023]
Abstract
O,O'-dibornyl dithiophosphete has been synthesized by the reaction of P2S5 and borneol in toluene. Fourier Transform Infrared spectra (FT-IR) of the title compound are measured. The molecular geometry, vibrational frequencies, infrared intensities and NMR spectrum of the title compound in the ground state have been calculated by using the density functional theory (DFT) and ab initio Hartree-Fock (HF) methods with the basis set of 6-31G(d). The computed bond lengths and bond angles show the good agreement with the experimental data. Moreover, the vibrational frequencies are calculated and the scaled values have been compared with experimental FT-IR spectra. Assignments of the vibrational modes are made on the basis of total energy distribution (TED) calculated with scaled quantum mechanical (SQM) method. The observed and calculated FT-IR and NMR spectra are in good agreement with each other.
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Affiliation(s)
- H H Kart
- Department of Physics, Pamukkale University, Kinikli, 20017 Denizli, Turkey.
| | - S Ozdemir Kart
- Department of Physics, Pamukkale University, Kinikli, 20017 Denizli, Turkey
| | - M Karakuş
- Department of Chemistry, Pamukkale University, Kinikli, 20017 Denizli, Turkey
| | - M Kurt
- Department of Physics, Ahi Evran University, 40100 Kırşehir, Turkey
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Ustun N, Celik M, Kurt M, Sen N, Akcay A, Turhanoglu A. SAT0173 Assessment of Left Ventricular Dyssynchrony in Patients with Familial Mediterranean Fever. Ann Rheum Dis 2014. [DOI: 10.1136/annrheumdis-2014-eular.1345] [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: 11/03/2022]
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Ustun N, Kurt M, Yagiz A, Guler H, Turhanoglu A. AB0952 Subclinical Left Ventricular Dysfunction in Patients with Ankylosing Spondylitis without Clinically Evident Cardiovascular Disease: A Two-Dimensional Speckle Tracking Echocardiographic Study. Ann Rheum Dis 2014. [DOI: 10.1136/annrheumdis-2014-eular.1961] [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: 11/04/2022]
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Turhanoglu A, Ustun N, Kurt M, Yagiz A, Guler H. AB0951 Preclinical Atherosclerosis in Patients with Ankylosing Spondylitis without Clinically Evident Cardiovascular Disease. Ann Rheum Dis 2014. [DOI: 10.1136/annrheumdis-2014-eular.1959] [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: 11/04/2022]
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45
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Nacar A, Topcu S, Büyükkaya Ş, Kurt M, Büyükkaya E, Şen N, Akçay A, Kavasoğlu B. PP-295 An Interesting Case of Acute Coronary Syndrome with Extensive Coronary Artery Aneurysms. Am J Cardiol 2014. [DOI: 10.1016/j.amjcard.2014.01.323] [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: 10/25/2022]
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46
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Karabacak M, Cinar M, Kurt M, Poiyamozhi A, Sundaraganesan N. The spectroscopic (FT-IR, FT-Raman, UV and NMR) first order hyperpolarizability and HOMO-LUMO analysis of dansyl chloride. Spectrochim Acta A Mol Biomol Spectrosc 2014; 117:234-244. [PMID: 23994679 DOI: 10.1016/j.saa.2013.07.095] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/03/2012] [Accepted: 07/29/2013] [Indexed: 06/02/2023]
Abstract
The solid phase FT-IR and FT-Raman spectra of dansyl chloride (DC) have been recorded in the regions 400-4000 and 50-4000 cm(-1), respectively. The spectra have been interpreted in terms of fundamentals modes, combination and overtone bands. The structure of the molecule has been optimized and the structural characteristics have been determined by density functional theory (B3LYP) method with 6-311++G(d,p) as basis set. The vibrational frequencies were calculated for most stable conformer and were compared with the experimental frequencies, which yield good agreement between observed and calculated frequencies. The infrared and Raman spectra have also been predicted from the calculated intensities. (1)H and (13)CNMR spectra were recorded and (1)H and (13)C nuclear magnetic resonance chemical shifts of the molecule were calculated using the gauge independent atomic orbital (GIAO) method. UV-Visible spectrum of the compound was recorded in the region 200-600 nm and the electronic properties HOMO and LUMO energies were measured by time-dependent TD-DFT approach. Nonlinear optical and thermodynamic properties were interpreted. All the calculated results were compared with the available experimental data of the title molecule.
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Affiliation(s)
- M Karabacak
- Department of Mechatronics Engineering, H.F.T. Technology Faculty, Celal Bayar University, 45400 Turgutlu, Manisa, Turkey
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Kurt M, Ozgultekin A, Turan G, Ormanci F, Batan S, Ekinci O. Impact of the neutral position and rotation of the head in ultrasound-guided internal jugular vein catheterization on duration of procedure and complications. Crit Care 2014. [PMCID: PMC4068174 DOI: 10.1186/cc13315] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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48
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Cinar Z, Karabacak M, Cinar M, Kurt M, Chinna Babu P, Sundaraganesan N. The infrared, Raman, NMR and UV spectra, ab initio calculations and spectral assignments of 2-amino-4-chloro-6-methoxypyrimidine. Spectrochim Acta A Mol Biomol Spectrosc 2013; 116:451-459. [PMID: 23973593 DOI: 10.1016/j.saa.2013.07.044] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/28/2013] [Revised: 07/04/2013] [Accepted: 07/21/2013] [Indexed: 06/02/2023]
Abstract
The 2-amino-4-chloro-6-methoxypyrimidine abbreviated as ACMP have been investigated by both the experimental and theoretical methods; through this work we provide the essential fact about the structural and vibrational insights. The optimized molecular structure, atomic charges, vibrational frequencies and ultraviolet spectral interpretation of ACMP have been studied by performing DFT/B3LYP/6-311++G(df,pd) level of theory. The FT-IR, FT-Raman spectra were recorded in the region 4000-400 cm(-1) and 4000-50 cm(-1) respectively. The UV absorption spectrum of the compound that dissolved in ethanol and water solution were recorded in the range of 200-400 nm. The scaled wavenumbers are compared with the experimental values. The difference between the observed and scaled wavenumber values of most of the fundamentals is very small. Based on the UV spectrum and TD-DFT calculations, the electronic structure and the assignments of the absorption bands were carried out. The (1)H, (13)C and DEPT 135 nuclear magnetic resonance (NMR) chemical shifts of the molecule were calculated using with the Gauge Including Atomic Orbital (GIAO) method and compared with experimental results. Besides, molecular electrostatic potential (MEP), frontier molecular orbitals (FMO) analysis were investigated using theoretical calculations.
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Affiliation(s)
- Z Cinar
- Department of Physics, Afyon Kocatepe University, 03040 Afyonkarahisar, Turkey
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Bulbul Sen B, Atci N, Rifaioglu E, Ekiz O, Kartal I, Buyukkaya E, Kurt M, Karakas M, Buyukkaya S, Akcay A, Sen N. Increased epicardial fat tissue is a marker of subclinical atherosclerosis in patients with psoriasis. Br J Dermatol 2013; 169:1081-6. [DOI: 10.1111/bjd.12569] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/29/2013] [Indexed: 12/20/2022]
Affiliation(s)
- B. Bulbul Sen
- Department of Dermatology; Mustafa Kemal University School of Medicine; Hatay Turkey
| | - N. Atci
- Department of Radiology; Mustafa Kemal University School of Medicine; Hatay Turkey
| | - E.N. Rifaioglu
- Department of Dermatology; Mustafa Kemal University School of Medicine; Hatay Turkey
| | - O. Ekiz
- Department of Dermatology; Mustafa Kemal University School of Medicine; Hatay Turkey
| | - I. Kartal
- Department of Radiology; Mustafa Kemal University School of Medicine; Hatay Turkey
| | - E. Buyukkaya
- Department of Cardiology; Mustafa Kemal University School of Medicine; Hatay Turkey
| | - M. Kurt
- Department of Cardiology; Mustafa Kemal University School of Medicine; Hatay Turkey
| | - M.F. Karakas
- Department of Cardiology; Mustafa Kemal University School of Medicine; Hatay Turkey
| | - S. Buyukkaya
- Department of Cardiology; Antakya State Hospital; Hatay Turkey
| | - A.B. Akcay
- Department of Cardiology; Mustafa Kemal University School of Medicine; Hatay Turkey
| | - N. Sen
- Department of Cardiology; Mustafa Kemal University School of Medicine; Hatay Turkey
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Borowski A, Godehardt E, Paprotny G, Kurt M. Intermittent cold-blood vs. warm-blood cardioplegia – a comparative study on myocardial acidosis during coronary bypass surgery. J Cardiothorac Surg 2013. [PMCID: PMC3853644 DOI: 10.1186/1749-8090-8-s2-p2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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