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Kassab M, Jehanzaib M, Başak K, Demir D, Keles GE, Turan M. FFPE++: Improving the quality of formalin-fixed paraffin-embedded tissue imaging via contrastive unpaired image-to-image translation. Med Image Anal 2024; 91:102992. [PMID: 37852162 DOI: 10.1016/j.media.2023.102992] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2022] [Revised: 04/29/2023] [Accepted: 10/02/2023] [Indexed: 10/20/2023]
Abstract
Formalin-fixation and paraffin-embedding (FFPE) is a technique for preparing and preserving tissue specimens that has been utilized in histopathology since the late 19th century. This process is further complicated by FFPE preparation steps such as fixation, processing, embedding, microtomy, staining, and coverslipping, which often results in artifacts due to the complex histological and cytological characteristics of a tissue specimen. The term "artifacts" includes, but is not limited to, staining inconsistencies, tissue folds, chattering, pen marks, blurring, air bubbles, and contamination. The presence of artifacts may interfere with pathological diagnosis in disease detection, subtyping, grading, and choice of therapy. In this study, we propose FFPE++, an unpaired image-to-image translation method based on contrastive learning with a mixed channel-spatial attention module and self-regularization loss that drastically corrects the aforementioned artifacts in FFPE tissue sections. Turing tests were performed by 10 board-certified pathologists with more than 10 years of experience. These tests which were performed for ovarian carcinoma, lung adenocarcinoma, lung squamous cell carcinoma, and papillary thyroid carcinoma, demonstrate the clear superiority of the proposed method in many clinical aspects compared with standard FFPE images. Based on the qualitative experiments and feedback from the Turing tests, we believe that FFPE++ can contribute to substantial diagnostic and prognostic accuracy in clinical pathology in the future and can also improve the performance of AI tools in digital pathology. The code and dataset are publicly available at https://github.com/DeepMIALab/FFPEPlus.
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Affiliation(s)
- Mohamad Kassab
- Department of Computer Engineering, Bogazici University, Istanbul, Turkey
| | - Muhammad Jehanzaib
- Department of Computer Engineering, Bogazici University, Istanbul, Turkey
| | - Kayhan Başak
- Sağlık Bilimleri University, Kartal Dr.Lütfi Kırdar City Hospital, Department of Pathology, Istanbul, Turkey
| | - Derya Demir
- Faculty of Medicine, Department of Pathology, Ege University, Izmir, Turkey
| | | | - Mehmet Turan
- Department of Computer Engineering, Bogazici University, Istanbul, Turkey.
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Turan M, Durmus F. UC-NfNet: Deep learning-enabled assessment of ulcerative colitis from colonoscopy images. Med Image Anal 2022; 82:102587. [DOI: 10.1016/j.media.2022.102587] [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] [Received: 02/16/2022] [Revised: 07/12/2022] [Accepted: 08/17/2022] [Indexed: 10/31/2022]
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Almalioglu Y, Turan M, Trigoni N, Markham A. Deep learning-based robust positioning for all-weather autonomous driving. NAT MACH INTELL 2022; 4:749-760. [PMID: 37790900 PMCID: PMC10543073 DOI: 10.1038/s42256-022-00520-5] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2022] [Accepted: 07/12/2022] [Indexed: 11/08/2022]
Abstract
Interest in autonomous vehicles (AVs) is growing at a rapid pace due to increased convenience, safety benefits and potential environmental gains. Although several leading AV companies predicted that AVs would be on the road by 2020, they are still limited to relatively small-scale trials. The ability to know their precise location on the map is a challenging prerequisite for safe and reliable AVs due to sensor imperfections under adverse environmental and weather conditions, posing a formidable obstacle to their widespread use. Here we propose a deep learning-based self-supervised approach for ego-motion estimation that is a robust and complementary localization solution under inclement weather conditions. The proposed approach is a geometry-aware method that attentively fuses the rich representation capability of visual sensors and the weather-immune features provided by radars using an attention-based learning technique. Our method predicts reliability masks for the sensor measurements, eliminating the deficiencies in the multimodal data. In various experiments we demonstrate the robust all-weather performance and effective cross-domain generalizability under harsh weather conditions such as rain, fog and snow, as well as day and night conditions. Furthermore, we employ a game-theoretic approach to analyse the interpretability of the model predictions, illustrating the independent and uncorrelated failure modes of the multimodal system. We anticipate our work will bring AVs one step closer to safe and reliable all-weather autonomous driving.
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Affiliation(s)
- Yasin Almalioglu
- Department of Computer Science, University of Oxford, Oxford, UK
| | - Mehmet Turan
- Department of Computer Engineering, Bogazici University, Istanbul, Turkey
| | - Niki Trigoni
- Department of Computer Science, University of Oxford, Oxford, UK
| | - Andrew Markham
- Department of Computer Science, University of Oxford, Oxford, UK
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Khalleefah M, Ostrovska S, Turan M. On the moment-determinacy of power Lindley distribution and some applications to software metrics. AN ACAD BRAS CIENC 2021; 93:e20191152. [PMID: 34586187 DOI: 10.1590/0001-3765202120191152] [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: 05/11/2019] [Accepted: 09/08/2019] [Indexed: 11/22/2022] Open
Abstract
The Lindley distribution and its numerous generalizations are widely used in statistical and engineering practice. Recently, a power transformation of Lindley distribution, called the power Lindley distribution, has been introduced by M. E. Ghitany et al. who initiated the investigation of its properties and possible applications. In this article, new results on the power Lindley distribution are presented. The focus of this work is on the moment-(in)determinacy of the distribution for various values of the parameters. Afterwards, certain applications are provided to describe data sets of software metrics.
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Affiliation(s)
| | - Sofiya Ostrovska
- Atilim University, Department of Mathematics, Incek 06836, Ankara, Turkey
| | - Mehmet Turan
- Atilim University, Department of Mathematics, Incek 06836, Ankara, Turkey
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Ozyoruk KB, Gokceler GI, Bobrow TL, Coskun G, Incetan K, Almalioglu Y, Mahmood F, Curto E, Perdigoto L, Oliveira M, Sahin H, Araujo H, Alexandrino H, Durr NJ, Gilbert HB, Turan M. EndoSLAM dataset and an unsupervised monocular visual odometry and depth estimation approach for endoscopic videos. Med Image Anal 2021; 71:102058. [PMID: 33930829 DOI: 10.1016/j.media.2021.102058] [Citation(s) in RCA: 35] [Impact Index Per Article: 11.7] [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: 09/15/2020] [Revised: 01/23/2021] [Accepted: 03/29/2021] [Indexed: 02/07/2023]
Abstract
Deep learning techniques hold promise to develop dense topography reconstruction and pose estimation methods for endoscopic videos. However, currently available datasets do not support effective quantitative benchmarking. In this paper, we introduce a comprehensive endoscopic SLAM dataset consisting of 3D point cloud data for six porcine organs, capsule and standard endoscopy recordings, synthetically generated data as well as clinically in use conventional endoscope recording of the phantom colon with computed tomography(CT) scan ground truth. A Panda robotic arm, two commercially available capsule endoscopes, three conventional endoscopes with different camera properties, two high precision 3D scanners, and a CT scanner were employed to collect data from eight ex-vivo porcine gastrointestinal (GI)-tract organs and a silicone colon phantom model. In total, 35 sub-datasets are provided with 6D pose ground truth for the ex-vivo part: 18 sub-datasets for colon, 12 sub-datasets for stomach, and 5 sub-datasets for small intestine, while four of these contain polyp-mimicking elevations carried out by an expert gastroenterologist. To verify the applicability of this data for use with real clinical systems, we recorded a video sequence with a state-of-the-art colonoscope from a full representation silicon colon phantom. Synthetic capsule endoscopy frames from stomach, colon, and small intestine with both depth and pose annotations are included to facilitate the study of simulation-to-real transfer learning algorithms. Additionally, we propound Endo-SfMLearner, an unsupervised monocular depth and pose estimation method that combines residual networks with a spatial attention module in order to dictate the network to focus on distinguishable and highly textured tissue regions. The proposed approach makes use of a brightness-aware photometric loss to improve the robustness under fast frame-to-frame illumination changes that are commonly seen in endoscopic videos. To exemplify the use-case of the EndoSLAM dataset, the performance of Endo-SfMLearner is extensively compared with the state-of-the-art: SC-SfMLearner, Monodepth2, and SfMLearner. The codes and the link for the dataset are publicly available at https://github.com/CapsuleEndoscope/EndoSLAM. A video demonstrating the experimental setup and procedure is accessible as Supplementary Video 1.
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Affiliation(s)
| | | | - Taylor L Bobrow
- Department of Biomedical Engineering, Johns Hopkins University, Baltimore, MD, USA
| | - Gulfize Coskun
- Institute of Biomedical Engineering, Bogazici University, Turkey
| | - Kagan Incetan
- Institute of Biomedical Engineering, Bogazici University, Turkey
| | | | - Faisal Mahmood
- Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA; Cancer Data Science, Dana Farber Cancer Institute, Boston, MA, USA; Cancer Program, Broad Institute of Harvard and MIT, Cambridge, MA, USA
| | - Eva Curto
- Institute for Systems and Robotics, University of Coimbra, Portugal
| | - Luis Perdigoto
- Institute for Systems and Robotics, University of Coimbra, Portugal
| | - Marina Oliveira
- Institute for Systems and Robotics, University of Coimbra, Portugal
| | - Hasan Sahin
- Institute of Biomedical Engineering, Bogazici University, Turkey
| | - Helder Araujo
- Institute for Systems and Robotics, University of Coimbra, Portugal
| | - Henrique Alexandrino
- Faculty of Medicine, Clinical Academic Center of Coimbra, University of Coimbra, Coimbra, Portugal
| | - Nicholas J Durr
- Department of Biomedical Engineering, Johns Hopkins University, Baltimore, MD, USA
| | - Hunter B Gilbert
- Department of Mechanical and Industrial Engineering, Louisiana State University, Baton Rouge, LA, USA
| | - Mehmet Turan
- Institute of Biomedical Engineering, Bogazici University, Turkey.
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İncetan K, Celik IO, Obeid A, Gokceler GI, Ozyoruk KB, Almalioglu Y, Chen RJ, Mahmood F, Gilbert H, Durr NJ, Turan M. VR-Caps: A Virtual Environment for Capsule Endoscopy. Med Image Anal 2021; 70:101990. [PMID: 33609920 DOI: 10.1016/j.media.2021.101990] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [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: 08/31/2020] [Revised: 02/01/2021] [Accepted: 02/02/2021] [Indexed: 02/06/2023]
Abstract
Current capsule endoscopes and next-generation robotic capsules for diagnosis and treatment of gastrointestinal diseases are complex cyber-physical platforms that must orchestrate complex software and hardware functions. The desired tasks for these systems include visual localization, depth estimation, 3D mapping, disease detection and segmentation, automated navigation, active control, path realization and optional therapeutic modules such as targeted drug delivery and biopsy sampling. Data-driven algorithms promise to enable many advanced functionalities for capsule endoscopes, but real-world data is challenging to obtain. Physically-realistic simulations providing synthetic data have emerged as a solution to the development of data-driven algorithms. In this work, we present a comprehensive simulation platform for capsule endoscopy operations and introduce VR-Caps, a virtual active capsule environment that simulates a range of normal and abnormal tissue conditions (e.g., inflated, dry, wet etc.) and varied organ types, capsule endoscope designs (e.g., mono, stereo, dual and 360∘ camera), and the type, number, strength, and placement of internal and external magnetic sources that enable active locomotion. VR-Caps makes it possible to both independently or jointly develop, optimize, and test medical imaging and analysis software for the current and next-generation endoscopic capsule systems. To validate this approach, we train state-of-the-art deep neural networks to accomplish various medical image analysis tasks using simulated data from VR-Caps and evaluate the performance of these models on real medical data. Results demonstrate the usefulness and effectiveness of the proposed virtual platform in developing algorithms that quantify fractional coverage, camera trajectory, 3D map reconstruction, and disease classification. All of the code, pre-trained weights and created 3D organ models of the virtual environment with detailed instructions how to setup and use the environment are made publicly available at https://github.com/CapsuleEndoscope/VirtualCapsuleEndoscopy and a video demonstration can be seen in the supplementary videos (Video-I).
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Affiliation(s)
- Kağan İncetan
- Institute of Biomedical Engineering, Bogazici University, Istanbul, Turkey
| | - Ibrahim Omer Celik
- Department of Computer Engineering, Bogazici University, Istanbul, Turkey
| | - Abdulhamid Obeid
- Institute of Biomedical Engineering, Bogazici University, Istanbul, Turkey
| | | | | | | | - Richard J Chen
- Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA; Department of Biomedical Informatics, Harvard Medical School, Boston, MA, USA
| | - Faisal Mahmood
- Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA; Cancer Data Science, Dana Farber Cancer Institute, Boston, MA, USA; Cancer Program, Broad Institute of Harvard and MIT, Cambridge, MA, USA
| | - Hunter Gilbert
- Deparment of Mechanical and Industrial Engineering, Louisiana State University, Baton Rouge, LA USA
| | - Nicholas J Durr
- Department of Biomedical Engineering, Johns Hopkins University (JHU), Baltimore, MD, USA
| | - Mehmet Turan
- Institute of Biomedical Engineering, Bogazici University, Istanbul, Turkey.
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Turan M. Effectiveness of synthetic data generation for capsule endoscopy images. Med-Science 2021. [DOI: 10.5455/medscience.2021.07.236] [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] Open
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Turan M. A generative adversarial network based super-resolution approach for capsule endoscopy images. Med-Science 2021. [DOI: 10.5455/medscience.2021.06.218] [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] Open
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Almalioglu Y, Bengisu Ozyoruk K, Gokce A, Incetan K, Irem Gokceler G, Ali Simsek M, Ararat K, Chen RJ, Durr NJ, Mahmood F, Turan M. EndoL2H: Deep Super-Resolution for Capsule Endoscopy. IEEE Trans Med Imaging 2020; 39:4297-4309. [PMID: 32795966 DOI: 10.1109/tmi.2020.3016744] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Although wireless capsule endoscopy is the preferred modality for diagnosis and assessment of small bowel diseases, the poor camera resolution is a substantial limitation for both subjective and automated diagnostics. Enhanced-resolution endoscopy has shown to improve adenoma detection rate for conventional endoscopy and is likely to do the same for capsule endoscopy. In this work, we propose and quantitatively validate a novel framework to learn a mapping from low-to-high-resolution endoscopic images. We combine conditional adversarial networks with a spatial attention block to improve the resolution by up to factors of 8× , 10× , 12× , respectively. Quantitative and qualitative studies demonstrate the superiority of EndoL2H over state-of-the-art deep super-resolution methods Deep Back-Projection Networks (DBPN), Deep Residual Channel Attention Networks (RCAN) and Super Resolution Generative Adversarial Network (SRGAN). Mean Opinion Score (MOS) tests were performed by 30 gastroenterologists qualitatively assess and confirm the clinical relevance of the approach. EndoL2H is generally applicable to any endoscopic capsule system and has the potential to improve diagnosis and better harness computational approaches for polyp detection and characterization. Our code and trained models are available at https://github.com/CapsuleEndoscope/EndoL2H.
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Turan M, Almalioglu Y, Gilbert HB, Mahmood F, Durr NJ, Araujo H, Sari AE, Ajay A, Sitti M. Learning to Navigate Endoscopic Capsule Robots. IEEE Robot Autom Lett 2019. [DOI: 10.1109/lra.2019.2924846] [Citation(s) in RCA: 9] [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: 12/22/2022]
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Turan M, Almalioglu Y, Araujo H, Konukoglu E, Sitti M. Deep EndoVO: A recurrent convolutional neural network (RCNN) based visual odometry approach for endoscopic capsule robots. Neurocomputing 2018. [DOI: 10.1016/j.neucom.2017.10.014] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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Sharafi P, Anlar B, Ersoy-Evans S, Varan A, Yılmaz OF, Turan M, Ayter S. The effect of parental age on NF1 patients in Turkey. J Community Genet 2017; 9:227-232. [PMID: 29143198 DOI: 10.1007/s12687-017-0346-0] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2017] [Accepted: 11/07/2017] [Indexed: 10/18/2022] Open
Abstract
Neurofibromatosis type 1 (NF1) is the most common neurogenetic disorder worldwide, and its clinical presentations are highly variable. NF1 is caused by mutations in the NF1 gene, and 50% of NF1 cases are sporadic, which occur in the absence of a family history of the disease and usually result from a new mutation in the germline of a parent. Advanced paternal age may increase the risk for germinal NF1 mutations; however, some dominant conditions, including neurofibromatosis, have shown a lesser association with paternal age, although there are conflicting reports in the literature. We investigated the effects of paternal and maternal age in 241 NF1 patients (121 sporadic and 120 familial cases) who were seen in Hacettepe hospital, a reference center for genetic diseases in Turkey. For statistical analysis, Spearman's and Chi-square tests were used. In this study, we evaluated paternal and maternal age at birth in sporadic and familial cases of NF1. We also compared the effect of parental age on the appearance and coexistence of various NF1 symptoms. There were no significant statistical differences between paternal age and coexistence of the NF1 symptoms. However, a slightly negative correlation was observed between paternal age and the coexistence of NF1 symptoms in familial cases (p < 0.05). We did not find strong evidence for the effect of parental age on the clinical severity of NF1.
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Affiliation(s)
- P Sharafi
- Department of Medical Biology, TOBB University of Economics and Technology, Faculty of Medicine, Ankara, Turkey
| | - B Anlar
- Department of Pediatrics, Pediatric Neurology, Hacettepe University, School of Medicine, Ankara, Turkey
| | - S Ersoy-Evans
- Department of Dermatology, Hacettepe University, School of Medicine, Ankara, Turkey
| | - A Varan
- Department of Pediatrics, Pediatric Oncology, Hacettepe University, School of Medicine, Ankara, Turkey
| | - O F Yılmaz
- Faculty of Medicine, TOBB University of Economics and Technology, Ankara, Turkey
| | - M Turan
- Faculty of Medicine, TOBB University of Economics and Technology, Ankara, Turkey
| | - S Ayter
- Department of Medical Biology, TOBB University of Economics and Technology, Faculty of Medicine, Ankara, Turkey.
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Abstract
OBJECTIVES Clinical application of gentamicin may cause nephrotoxicity and ototoxicity. Our study is the first study to investigate the protective effects of edaravone against the gentamicin-induced ototoxicity. We investigated the protective effect of intraperitoneal (i.p.) edaravone application against gentamicin-induced ototoxicity in guinea pigs. METHODS Fourteen guinea pigs were divided into two equal groups consisting of a control group and a study group. One-hundred sixty milligrams per kilogram subcutaneous gentamicin and 0.3 mL i.p. saline were applied simultaneously once daily to seven guinea pigs in the control group (group 1). One-hundred sixty milligrams per kilogram gentamicin was applied subcutaneously and 3 mg/kg edaravone was applied intraperitoneally once daily for 7 days simultaneously to seven guinea pigs in the study group (group 2). Following the drug application, auditory brainstem response measurements were performed for the left ear on the 3rd and 7th days. RESULTS Hearing threshold values of the group 1 and group 2 measured in the 3rd day of the study were detected as 57.14 ± 4.88 and 82.86 ± 7.56, respectively. This difference was statistically significant ( p < 0.05). Hearing threshold values of the group 1 and group 2 measured in the 7th day of the study were detected as 87.14 ± 4.88 and 62.86 ± 4.88, respectively. This difference was statistically significant ( p < 0.05). CONCLUSION A statistically significant difference between the average threshold values of edaravone-administered group 2 and that of group 1 without edaravone was found. These differences show that systemic edaravone administration could diminish ototoxic effects of gentamicin and the severity of the hearing loss.
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Affiliation(s)
- M Turan
- 1 Department of Otolaryngology-Head and Neck Surgery, Faculty of Medicine, Yüzüncü Yıl University, Van, Turkey
| | - E Ciğer
- 2 Department of Otolaryngology-Head and Neck Surgery, Ataturk Training and Research Hospital, Katip Celebi University, Izmir, Turkey
| | - S Arslanoğlu
- 2 Department of Otolaryngology-Head and Neck Surgery, Ataturk Training and Research Hospital, Katip Celebi University, Izmir, Turkey
| | - H Börekci
- 3 Department of General Surgery, Faculty of Medicine, Bozok University, Yozgat, Turkey
| | - K Önal
- 2 Department of Otolaryngology-Head and Neck Surgery, Ataturk Training and Research Hospital, Katip Celebi University, Izmir, Turkey
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Affiliation(s)
- F. Oz
- Department of Food Engineering, Faculty of Agriculture; Ataturk University; 25240 Erzurum Turkey
| | - M.I. Aksu
- Department of Food Engineering, Faculty of Agriculture; Ataturk University; 25240 Erzurum Turkey
| | - M. Turan
- Department of Genetics and Bioengineering, Faculty of Engineering and Architecture; Yeditepe University; İstanbul Turkey
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Dogan M, Sen M, Koc M, Silig Y, Akyol G, Karadayi K, Turan M. Effects of the Pringle Manoeuvre on the Healing of Left Colonic Anastomoses in Rats. Acta Chir Belg 2016. [DOI: 10.1080/00015458.2014.11680979] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [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)
- M. Dogan
- Department of General Surgery, Sivas, Turkey
| | - M. Sen
- Department of General Surgery, Sivas, Turkey
| | - M. Koc
- Department of General Surgery, Sivas, Turkey
| | - Y. Silig
- Department of Biochemistry, Faculty of Medicine, Cumhuriyet University, Sivas, Turkey
| | - G. Akyol
- Department of General Surgery, Sivas, Turkey
| | - K. Karadayi
- Department of General Surgery, Sivas, Turkey
| | - M. Turan
- Department of General Surgery, Sivas, Turkey
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Amjadi M, Turan M, Clementson CP, Sitti M. Parallel Microcracks-based Ultrasensitive and Highly Stretchable Strain Sensors. ACS Appl Mater Interfaces 2016; 8:5618-5626. [PMID: 26842553 DOI: 10.1021/acsami.5b12588] [Citation(s) in RCA: 110] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
There is an increasing demand for flexible, skin-attachable, and wearable strain sensors due to their various potential applications. However, achieving strain sensors with both high sensitivity and high stretchability is still a grand challenge. Here, we propose highly sensitive and stretchable strain sensors based on the reversible microcrack formation in composite thin films. Controllable parallel microcracks are generated in graphite thin films coated on elastomer films. Sensors made of graphite thin films with short microcracks possess high gauge factors (maximum value of 522.6) and stretchability (ε ≥ 50%), whereas sensors with long microcracks show ultrahigh sensitivity (maximum value of 11,344) with limited stretchability (ε ≤ 50%). We demonstrate the high performance strain sensing of our sensors in both small and large strain sensing applications such as human physiological activity recognition, human body large motion capturing, vibration detection, pressure sensing, and soft robotics.
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Affiliation(s)
- Morteza Amjadi
- Physical Intelligence Department, Max Planck Institute for Intelligent Systems , Heisenberstr. 3, 70569, Stuttgart, Germany
| | - Mehmet Turan
- Physical Intelligence Department, Max Planck Institute for Intelligent Systems , Heisenberstr. 3, 70569, Stuttgart, Germany
| | - Cameron P Clementson
- Physical Intelligence Department, Max Planck Institute for Intelligent Systems , Heisenberstr. 3, 70569, Stuttgart, Germany
- Department of Biomedical Engineering, University of Arizona , Tucson 85721, Arizona, United States
| | - Metin Sitti
- Physical Intelligence Department, Max Planck Institute for Intelligent Systems , Heisenberstr. 3, 70569, Stuttgart, Germany
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Ar soy A, Ekin S, Sertogullarindan B, Gunbatar H, Sunnetcioglu A, Aksoy N, Sezen H, Asker S, Turan M, Yildiz H. The Relationship Among Oxidative and Anti-Oxidative Parameters and Myeloperoxidase in Subjects With Obstructive Sleep Apnea Syndrome. Respir Care 2015; 61:200-4. [DOI: 10.4187/respcare.04277] [Citation(s) in RCA: 3] [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: 11/05/2022]
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Sitti M, Ceylan H, Hu W, Giltinan J, Turan M, Yim S, Diller E. Biomedical Applications of Untethered Mobile Milli/Microrobots. Proc IEEE Inst Electr Electron Eng 2015; 103:205-224. [PMID: 27746484 PMCID: PMC5063027 DOI: 10.1109/jproc.2014.2385105] [Citation(s) in RCA: 289] [Impact Index Per Article: 32.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/19/2023]
Abstract
Untethered robots miniaturized to the length scale of millimeter and below attract growing attention for the prospect of transforming many aspects of health care and bioengineering. As the robot size goes down to the order of a single cell, previously inaccessible body sites would become available for high-resolution in situ and in vivo manipulations. This unprecedented direct access would enable an extensive range of minimally invasive medical operations. Here, we provide a comprehensive review of the current advances in biome dical untethered mobile milli/microrobots. We put a special emphasis on the potential impacts of biomedical microrobots in the near future. Finally, we discuss the existing challenges and emerging concepts associated with designing such a miniaturized robot for operation inside a biological environment for biomedical applications.
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Affiliation(s)
- Metin Sitti
- Max-Planck Institute for Intelligent Systems, 70569 Stuttgart, Germany, and also are with Department of Mechanical Engineering, Carnegie Mellon University, Pittsburgh, PA 15238 USA
| | - Hakan Ceylan
- Max-Planck Institute for Intelligent Systems, 70569 Stuttgart, Germany
| | - Wenqi Hu
- Max-Planck Institute for Intelligent Systems, 70569 Stuttgart, Germany
| | - Joshua Giltinan
- Max-Planck Institute for Intelligent Systems, 70569 Stuttgart, Germany, and also are with Department of Mechanical Engineering, Carnegie Mellon University, Pittsburgh, PA 15238 USA
| | - Mehmet Turan
- Max-Planck Institute for Intelligent Systems, 70569 Stuttgart, Germany
| | - Sehyuk Yim
- Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139 USA
| | - Eric Diller
- Department of Mechanical and Industrial Engineering, University of Toronto, Toronto, ON M5S3G8, Canada
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Feng S, Caire R, Cortazar B, Turan M, Wong A, Ozcan A. Immunochromatographic diagnostic test analysis using Google Glass. ACS Nano 2014; 8:3069-79. [PMID: 24571349 PMCID: PMC3988681 DOI: 10.1021/nn500614k] [Citation(s) in RCA: 68] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/30/2014] [Accepted: 02/20/2014] [Indexed: 05/03/2023]
Abstract
We demonstrate a Google Glass-based rapid diagnostic test (RDT) reader platform capable of qualitative and quantitative measurements of various lateral flow immunochromatographic assays and similar biomedical diagnostics tests. Using a custom-written Glass application and without any external hardware attachments, one or more RDTs labeled with Quick Response (QR) code identifiers are simultaneously imaged using the built-in camera of the Google Glass that is based on a hands-free and voice-controlled interface and digitally transmitted to a server for digital processing. The acquired JPEG images are automatically processed to locate all the RDTs and, for each RDT, to produce a quantitative diagnostic result, which is returned to the Google Glass (i.e., the user) and also stored on a central server along with the RDT image, QR code, and other related information (e.g., demographic data). The same server also provides a dynamic spatiotemporal map and real-time statistics for uploaded RDT results accessible through Internet browsers. We tested this Google Glass-based diagnostic platform using qualitative (i.e., yes/no) human immunodeficiency virus (HIV) and quantitative prostate-specific antigen (PSA) tests. For the quantitative RDTs, we measured activated tests at various concentrations ranging from 0 to 200 ng/mL for free and total PSA. This wearable RDT reader platform running on Google Glass combines a hands-free sensing and image capture interface with powerful servers running our custom image processing codes, and it can be quite useful for real-time spatiotemporal tracking of various diseases and personal medical conditions, providing a valuable tool for epidemiology and mobile health.
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Affiliation(s)
- Steve Feng
- Electrical Engineering Department, Bioengineering Department, California NanoSystems Institute, and Department of Surgery, David Geffen School of Medicine, University of California, Los Angeles, California 90095, United States
| | - Romain Caire
- Electrical Engineering Department, Bioengineering Department, California NanoSystems Institute, and Department of Surgery, David Geffen School of Medicine, University of California, Los Angeles, California 90095, United States
| | - Bingen Cortazar
- Electrical Engineering Department, Bioengineering Department, California NanoSystems Institute, and Department of Surgery, David Geffen School of Medicine, University of California, Los Angeles, California 90095, United States
| | - Mehmet Turan
- Electrical Engineering Department, Bioengineering Department, California NanoSystems Institute, and Department of Surgery, David Geffen School of Medicine, University of California, Los Angeles, California 90095, United States
| | - Andrew Wong
- Electrical Engineering Department, Bioengineering Department, California NanoSystems Institute, and Department of Surgery, David Geffen School of Medicine, University of California, Los Angeles, California 90095, United States
| | - Aydogan Ozcan
- Electrical Engineering Department, Bioengineering Department, California NanoSystems Institute, and Department of Surgery, David Geffen School of Medicine, University of California, Los Angeles, California 90095, United States
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Dogan M, Sen M, Koc M, Silig Y, Akyol G, Karadayi K, Turan M. Effects of the Pringle manoeuvre on the healing of left colonic anastomoses in rats. Acta Chir Belg 2014; 114:63-65. [PMID: 24720141] [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] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
BACKGROUND Whether to perform colorectal cancer and liver metastasis resections simultaneously or in separate procedures is controversial. The aim of the present study was to investigate the effect of the Pringle manoeuvre on the healing of left-sided colonic anastomoses in rats. METHODS Sixteen rats were randomly separated into two groups. In Groups 1 and 2, 1 cm of descending colon was resected and a primary anastomosis was performed. In Group 2, an intermittent pedicle clamp (the Pringle manoeuvre) was performed. On postoperative day 5, laparotomy was performed and the bursting pressures of all colon anastomoses were determined. Tissues were sampled for assay of hydroxyproline levels. Cultures of intraperitoneal swabs were also performed. RESULTS Clostridium was twice as abundant in the Pringle manoeuvre group as in the control group (p < 0.05). Anastomosis-bursting pressures and tissue hydroxyproline levels were significantly lower in the Pringle manoeuvre group than in the control group (p < 0.05). CONCLUSIONS The Pringle manoeuvre may compromise the viability of colonic anastomoses.
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Tuncer E, Unver-Saraydin S, Tepe B, Karadayi S, Ozer H, Karadayi K, Inan D, Elagoz S, Polat Z, Duman M, Turan M. Antitumor effects of Origanum acutidens extracts on human breast cancer. J BUON 2013; 18:77-85. [PMID: 23613392] [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: 06/02/2023]
Abstract
PURPOSE There has been a long-standing interest in the identification of medicinal plants and derived natural products for developing anticancer agents. This work aimed at investigating the antiprolipherative properties of Origanum acutidens (OA) on breast cancer. METHODS OA water extracts were studied for cytotoxicity against the breast cancer cell lines MCF-7, MDA-MB-468 and MDA-MB-231. In vitro apoptosis studies of these cancer cell lines were performed by annexin V staining in flow cytometry analyses. Immunohistochemistry studies for Ki-67 and caspase-7 of tumor tissue sections of dimethylbenzanthracene (DMBA) -induced mammary cancer in rats were also performed. TUNEL assay was used to detect apoptotic cells of tumor tissue. In vivo anticancer activity testing was carried out by inhibiting the growth of DMBA-induced mammary cancer in rats. RESULTS OA showed cytotoxicity on all 3 cancer cell lines. Annexin-positive cells level in OA-treated cell lines were significantly higher compared with untreated control cells (p=0.002). The expressions of caspase-7 protein and TUNEL-positive cells were much higher for the rats treated by OA, compared with the untreated control group (p<0.05). The expressions of the Ki-67 decreased in the treated groups compared with the control group (p<0.05). In vivo studies showed that the mean tumor volume inhibition ratio in OA-treated group was 41 % compared with the untreated rats (p<0.05). CONCLUSION These results indicate that OA has antitumor activity against breast cancer cell lines.
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Affiliation(s)
- E Tuncer
- Department of Pathology, Comhuriyet University Faculty of Medicine, Sivas, Turkey
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Ilhan I, Yildirim F, Dertli N, Turan M, Tarihci S. A destructive urban transformation project resulting with a social transformation process in Ankara-Turkey. Eur Psychiatry 2011. [DOI: 10.1016/s0924-9338(11)72250-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/18/2022] Open
Abstract
IntroductionDikmen Valley is a slum district where the Municipality of Ankara intended to start an urban transformation project. Dikmen neighborhood includes nearly 1000 houses which the Municipiality attempted to pull down suddenly at night in the winter of 2007.Residents of Dikmen Valley resisted and managed to stop this attempt. Whole event was experienced as an acute trauma as well as a continuous experience of anxiety because of ongoing risk of another attack.AimThe aim of the present study was to investigate the psychological consequences of the whole process.MethodsThe study sample consisted of 201 individuals from 106 households, and a total of 178 individuals from 102 households was taken as comparison group from another slum neighborhood where residents did not experience any threat to their houses. The Beck Depression Inventory, the Spielberger Trait Anxiety Scale, and the General Self-Efficacy Scale were used for assessment.ResultsDikmen sample was found to have a statistically significant higher mean score of anxiety and depression compared to the comparison group. Dikmen had a higher level of general self-efficacy belief than the comparison group after controlling for depression and anxiety scores.ConclusionsAlthough the traumatic process after an attack of pulling down and the threat of losing one's house resulted with a depressive state and anxiety in Dikmen residents, unexpectedly they had a high level of general self-efficacy. To the researchers’ observations, a social transformational process has been realized resulting with an overall high general self-efficacy level in Dikmen neighborhood.
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Karaayvaz M, Calişkaner Z, Turan M, Akar A, Oztürk S, Ozangüç N. Levothyroxine versus ketotifen in the treatment of patients with chronic urticaria and thyroid autoimmunity. J DERMATOL TREAT 2009; 13:165-72. [PMID: 19753736 DOI: 10.1080/09546630212345673] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
BACKGROUND Thyroid hormone replacement therapy has previously been discussed as a feasible therapeutic approach in patients with chronic urticaria and/or angio-oedema (CUA) and thyroid autoimmunity (TA). OBJECTIVE The efficacy of levothyroxine was investigated in patients with CUA and TA by comparing it with ketotifen treatment. METHODS A total of 60 patients with CUA and TA were included in the study. Patients were divided into two groups, which were matched with respect to sex, age and symptom score. Each group consisted of 30 patients. Patients in one group were treated with ketotifen and the other with levothyroxine. After completion of the treatment periods, the pre- and post-treatment symptom scores, onset time of drug effects, duration of symptom-free period, recurrence ratios, recurrence times and side effects were evaluated for each drug. The two drugs were compared with each other according to these parameters. RESULTS Ketotifen treatment provided significant relief of symptoms. However, these beneficial effects were observed only in ongoing treatment. Symptoms reappeared in all patients during the drug-free follow-up period. On the other hand, 18 of 30 patients were completely improved and three patients partially improved with levothyroxine treatment. Symptoms did not recur in the completely improved patients. CONCLUSION Levothyroxine is an important and inexpensive treatment alternative in patients with CUA and TA.
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Affiliation(s)
- M Karaayvaz
- Department of Internal Medicine, Division of Allergic Diseases, Gülhane Military Medical Academy, Ankara, Turkey.
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Aydýn SA, Bulut M, Topal NB, Akgoz S, Koksal O, Orcan S, Turan M, Aydýn T, Gültekin E, Oncu MR, Durmus O, Eren B, Ozguç H. Performance of emergency medicine residents in the interpretation of radiographs in patients with trauma. Emerg Med J 2008; 25:482-5. [PMID: 18660393 DOI: 10.1136/emj.2007.054320] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
BACKGROUND Radiographs are vital diagnostic tools that complement physical examination in trauma patients. A study was undertaken to assess the performance of residents in emergency medicine in the interpretation of trauma radiographs. METHODS 348 radiographs of 100 trauma patients admitted between 1 March and 1 May 2007 were evaluated prospectively. These consisted of 93 cervical spine (C-spine) radiographs, 98 chest radiographs, 94 radiographs of the pelvis and 63 computed tomographic (CT) scans. All radiological material was evaluated separately by five emergency medicine residents and a radiology resident who had completed the first 3 years of training. The same radiographs were then evaluated by a radiologist whose opinion was considered to be the gold standard. The sensitivity, specificity, positive predictive value (PPV) and negative predictive value (NPV) were calculated. RESULTS The mean (SE) age of the patients was 29 (2) years (range 2-79). There were no statistically significant differences in terms of pathology detection between the emergency medicine residents and the radiologist. The agreement between the emergency medicine residents and the radiology resident was excellent for radiographs of the pelvis and the lung (kappa (kappa) = 0.928 and 0.863, respectively; p<0.001) and good for C-spine radiographs and CT scans (kappa = 0.789 and 0.773, respectively; p<0.001). CONCLUSIONS Accurate interpretation of radiographs by emergency medicine residents who perform the initial radiological and therapeutic interventions on trauma patients is of vital importance. The performance of our residents was found to be satisfactory in this regard.
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Affiliation(s)
- S A Aydýn
- Uludag University Medical School Department of Emergency Medicine, Bursa 16059, Turkey.
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Haberal M, Telatar H, Bilgin N, Buyukpamukcu N, Kayhan B, Bayraktar Y, Arslan G, Karamehmetoglu M, Gulay H, Sert S, Uzunalimoglu B, Turan M, Koc M, Hamaloglu E. Living-related liver transplantation in an adult and a child. EXP CLIN TRANSPLANT 2008; 6:95-100. [PMID: 18816234] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Affiliation(s)
- M Haberal
- Turkish Transplantation and Burn Foundation Hospital Fevzi Cakmak Cad., 10. Sk., No: 45, 06490 Bahcelievler, Ankara, Turkey.
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Tütüncü Z, Turan M, Barut A, Yüzbasioğlu N, Karagülle M. Changes in TNFα plasma levels in osteoarthritic patients under balneotherapy with acratothermal water. Phys Rehab Kur Med 2008. [DOI: 10.1055/s-2008-1061908] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Ataergin A, Ozturk M, Turan M, Ozet A, Arpaci F, Beyzadeoglu M, Oysul K, Kilicli F, Komurcu S, Ozturk B. 7523 POSTER High-dose chemotherapy and autologous peripheral blood stem cell transplantation after the completion of long-lasting St. Jude Hospital protocol: early results of a pilot study. EJC Suppl 2007. [DOI: 10.1016/s1359-6349(07)71500-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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Yuceturk H, Yagmurdur MC, Gur G, Demirbilek M, Bilezikci B, Turan M, Karakayali H, Haberal M. Role of Heparin on TNF-α and IL-6 Levels in Liver Regeneration after Partial Hepatic Resection. Eur Surg Res 2007; 39:216-21. [PMID: 17438357 DOI: 10.1159/000101744] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [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: 10/06/2006] [Accepted: 01/06/2007] [Indexed: 01/06/2023]
Abstract
OBJECTIVES The aim of this study was to investigate the effect of heparin on TNF-alpha and interleukin (IL)-6 levels and the complement system in liver regeneration in a murine model. MATERIALS AND METHODS 32 Wistar albino female rats weighing between 180 and 250 g were included in the study. The rats were divided into four groups as follows: group 1, treated with partial (50%) hepatectomy and intravenous heparin 1,000 IU/kg in repeated daily doses; group 2, treated with sham operation and intravenous heparin 1,000 IU/kg in repeated daily doses; group 3, treated with partial (50%) hepatectomy, and group 4 (controls), treated with only sham operation. Before the surgical intervention and after a general anesthetic had been administered to all rats, blood was taken from the left ventricle of each rat, and each sample was assessed to determine total complement hemolytic activity (CH(50)/ml). On the 5th postoperative day, blood was taken to assess CH(50) activity and the levels of TNF-alpha and IL-6 via ELISA. Each rat was then killed by decapitation after which gravimetric analysis and immunohistochemical staining for proliferating cell nuclear antigen (PCNA) were performed. RESULTS Serum CH(50) activity of group 1 was 4% as compared to 51% in group 3 (p = 0.01). The serum TNF-alpha level of group 1 was 43 pg/ml as compared to 86 pg/ml in group 3 (p = 0.002). The serum IL-6 level of group 1 was 19 pg/ml as compared to 44 pg/ml in group 3 (p = 0.02). The serum IL-6 level of group 2 was 4 pg/ml as compared to 44 pg/ml in group 3 (p = 0.005). According to the results of gravimetric analysis, the mean regeneration rate of group 1 was 4.4% as compared to 22% of group 3 (p = 0.001). The mean PCNA index values of group 2 was the highest of all groups (p = 0.01). However, the mean PCNA index value of group 1 was the lowest of all groups (p = 0.01). CONCLUSION Because of its anti-inflammatory action via the complement system, heparin produced an unfavorable effect on liver regeneration.
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Affiliation(s)
- H Yuceturk
- Department of Gastroenterology, Baskent University Faculty of Medicine, Ankara, Turkey
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Bulut M, Koksal O, Korkmaz A, Turan M, Ozguc H. Childhood falls: characteristics, outcome, and comparison of the Injury Severity Score and New Injury Severity Score. Emerg Med J 2006; 23:540-5. [PMID: 16794098 PMCID: PMC2579549 DOI: 10.1136/emj.2005.029439] [Citation(s) in RCA: 51] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
OBJECTIVES The aim of this study was to determine the general characteristics of childhood falls, factors affecting on mortality, and to compare the Injury Severity Score (ISS) and the New Injury Severity Score (NISS) as predictors of mortality and length of hospital stay in childhood falls. METHODS We retrospectively analysed over a period of 8 years children aged younger than14 years who had sustained falls and who were admitted to our emergency department. Data on the patients' age, sex, type of fall, height fallen, arrival type, type of injuries, scoring systems, and outcome were investigated retrospectively. The ISS and NISS were calculated for each patient. Comparisons between ISS and NISS for prediction of mortality were made by receiver operating characteristic (ROC) curve and Hosmer-Lemeshow (HL) goodness of fit statistics. RESULTS In total, there were 2061 paediatric trauma patients. Falls comprised 36 (n = 749) of these admissions. There were 479 male and 270 female patients. The mean (SD) age was 5.01 (3.48) years, and height fallen was 3.8 (3) metres. Over half (56.6%) of patients were referred by other centres. The most common type of fall was from balconies (38.5%), and head trauma was the most common injury (50%). The overall mortality rate was 3.6%. The cut off value for both the ISS and NISS in predicting mortality was 22 (sensitivity 90.5%, specificity 95.4% for ISS; sensitivity 100%, specificity 88.7% for NISS) (p>0.05). Significant factors affecting mortality in logistic regression analysis were Glasgow Coma Scale (GCS) <9, ISS >22, and NISS >22. There were no significant differences in ROC between three scoring systems. The HL statistic showed poorer calibration (p = 0.02 v p = 0.37, respectively) of the NISS compared with the ISS. CONCLUSIONS In our series, the head was the most frequent site of injury, and the most common type of fall was from balconies. Scores on the GCS, NISS, and ISS are significantly associated with mortality. The performance of the NISS and ISS in predicting mortality in childhood falls was similar.
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Affiliation(s)
- M Bulut
- Department of Emergency Medicine, Uludag University Medical School, Bursa, Turkey.
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Abstract
In this study, we examined peripheral insulin resistance in patients with Behçet's disease (BD) characterized by chronic inflammation and endothelial dysfunction. Fourteen patients with BD and 15 healthy controls were recruited to the study. Insulin resistance was investigated by the hyperinsulinaemic-euglycaemic glucose clamp technique. BD patients displayed an enhanced rate of insulin resistance compared to healthy controls (P = 0.014). The insulin sensitivity (M), measured as the glucose utilization rate under steady-state conditions of euglycaemia, was significantly decreased (P = 0.001) in BD patients compared to the controls (4.09 +/- 0.16 vs. 5.60 +/- 0.27 mg/kg/min). The C-reactive protein (CRP) level, but not the erythrocyte sedimentation rate (ESR), was significantly related to the presence of insulin resistance (CRP: r(s) = 0.589, P = 0.27; ESR: r(s) = 0444, P = 0112), whereas no relationship was found between the M-value and ESR or CRP. We conclude that patients with BD exhibit peripheral insulin resistance; this could be explained as the diverse consequences of inflammation and endothelial dysfunction in BD.
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Affiliation(s)
- H Erdem
- Division of Rheumatology of the Department of Medicine, Gulhane Military Medical Academy, Etlik, Ankara, Turkey.
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Bilezikçi B, Sahin F, Uyar P, Yilmaz Z, Demirhan B, Turan M, Arat Z, Haberal M. Frequency of Recipient-Derived Chimerism and Relationship With Acute Rejection and HLA Tissue Typing in Transplanted Livers. Transplant Proc 2006; 38:598-601. [PMID: 16549185 DOI: 10.1016/j.transproceed.2005.12.059] [Citation(s) in RCA: 4] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
BACKGROUND We sought to determine the extent and time course of recipient-derived chimerism after transplantation and the relationship with acute rejection episodes (ARE) and HLA typing in hepatic allograft patients. PATIENTS AND METHODS We studied 18 needle liver biopsy specimens from patients who had undergone orthotopic liver transplantation. Fluorescent in situ hybridization (FISH) analysis for X and Y chromosomes was performed in all cases with a sex mismatch. To evaluate the HLA matching, we used serological and polymerase chain reaction (PCR) methodology. RESULTS There was a sex mismatch between the recipients and donors in all cases. X and Y chromosome chimerism was detected in 14 of 18 (83%; 31.14 +/- 27.4) patients. Also, no statistical association was found between the presence and the extent of chimerism and clinicopathological parameters (P < .05). CONCLUSIONS Our results suggest that chimerism was frequently seen in liver allografts, but it did not influence the occurrence of ARE, tissue compatibility, or histopathological changes in the posttransplantation period. The clinical, immunological, and histopathological relevance of chimerism remain unclear. These results may relate to the small number of patients and disproportion of chimerism-positive versus-negative cases. Further prospective studies will be required to clarify these findings in a larger population of liver transplant patients.
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Affiliation(s)
- B Bilezikçi
- Department of Pathology, Baskent University Faculty of Medicine, Ankara, Turkey.
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Başaran O, Ozcay F, Karakayali H, Turan M, Dalgiç A, Haberal M. Influence of HLA compatibility on success with living-related pediatric liver transplantation. Transplant Proc 2006; 37:3151-3. [PMID: 16213333 DOI: 10.1016/j.transproceed.2005.07.009] [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] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
It is not clear how HLA compatibility influences acute rejection and postoperative complications in cadaveric liver transplantation. Even less is known about this factor in pediatric living-related liver transplantation (LRLT). This research assessed HLA compatibility relative to rejection rates and complications in pediatric LRLT. The study retrospectively investigated data from 14 pediatric LRLTs in which the donor and recipient HLA genotypes were determined preoperatively. Three recipients (21.4%) developed biliary complications (two biliary leakage, one bile duct stenosis). Three others (21.4%) developed vascular complications (two hepatic artery thrombosis, one hepatic artery stenosis). Eight recipients (57.1%) were diagnosed with acute rejection. The incidence of acute rejection was not correlated with the number of HLA mismatches (P > .05), or with the number of HLA class I mismatches (P > .05); however, it was negatively correlated with number of HLA class II mismatches (P = .02). Arterial and biliary complications were not correlated with any of these categories of HLA compatibility. In conclusion, the data from this small group of patients provided no evidence that closeness of donor-recipient HLA matching influences outcome in pediatric LRLT.
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Affiliation(s)
- O Başaran
- Baskent University Faculty of Medicine, Department of General Surgery, Transplantation Division, Ankara, Turkey
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Dinc A, Bayir A, Simsek I, Erdem H, Pay S, Turan M. The proportional Venn diagram of Behçet's disease-related manifestations among young adult men in Turkey. Clin Exp Rheumatol 2005; 23:S86-90. [PMID: 16273772] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
OBJECTIVES To determine the frequency of the features associated with Behçet's disease (BD) in a young men population and generate a proportional Venn diagram of those features. METHODS Data was collected from 3714 otherwise healthy men recruited for military service at the entrance. Study was conducted in a two-step procedure. Firstly, all participants were questioned by a general practitioner via using visual Behçet's questionnaire. Those participants, in whom at least one BD-related manifestation of the disease (oral ulcer, genital ulcer, folliculitis, erythema nodosum, uveitis, venous involvement of the lower extremities) have been demonstrated, were further examined by a rheumatologist at the second-stage of the study. RESULTS The areas of intersection among the 6 individual BD-related manifestations produced 63 mutually exclusive symptom groups. Sixteen out 63 of these groups were functionally operative in our study population. Forty-seven (1.2%) of the all participants were considered to have at least 1 of the BD-related manifestation after examined by rheumatologist. The prevalence rates of the individual manifestations among the study population were as follows; oral ulcer 29 (0.78%), folliculitis 31 (0.83%), genital ulcer 9 (0.24%), venous involvement 13 (0.35%), erythema nodosum 4 (0.10%) and uveitis 3 (0.08%). The group consisting of oral ulcer with folliculitis was the largest proportion of participants followed by the group having oral ulcer only, accounting for 0.29% and 0.18%, respectively. Four (0.1%) of the participants were fulfilled the International Study Group for BD criteria following rheumatologic and ophthalmologic examinations. After excluding the group having oral ulcer with folliculitis, additional 12 cases had features suggesting BD though they didn't fulfill the International Study Group for BD criteria. CONCLUSION The Venn diagram of this study demonstrates that International Study Group for BD criteria can detect almost the quarter of 16 cases suspected as having BD. We suggest that the application of information regarding the frequencies of individual BD-related manifestations and their association with each other in a general population might serve as a helpful tool for physicians while making diagnosis.
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Affiliation(s)
- A Dinc
- Department of Medicine, Division of Rheumatology, Gülhane Military School of Medicine, Etlik-Ankara, Turkey.
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Benkli YE, Can MF, Turan M, Celik MS. Modification of organo-zeolite surface for the removal of reactive azo dyes in fixed-bed reactors. Water Res 2005; 39:487-493. [PMID: 15644257 DOI: 10.1016/j.watres.2004.10.008] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/12/2004] [Revised: 09/15/2004] [Accepted: 10/05/2004] [Indexed: 05/24/2023]
Abstract
Modification of zeolite (clinoptilolite) surface with a quaternary amine, hexadecyl trimethyl ammonium bromide (HTAB), to improve the removal efficiency of reactive azo dyes in a zeolite fixed bed was investigated. A series of adsorption tests were conducted to find out the uptake of three types of reactive dyes, i.e. CI Reactive Black 5, Red 239 and Yellow 176. Each run consisted of modifying zeolite with HTAB in the column followed by removal of color from the modified zeolite bed. The breakthrough curves for modification process were constructed under different conditions by plotting the normalized effluent concentration (C/C(0)) versus time or bed volumes (BV). Optimization studies show that 3g/l of HTAB dosage at a flowrate of 0.025l/min showed the best performance. Examination of the dye removal under the optimum modification conditions reveals that the black dye gives the highest breakthrough point among the three dyes tested. This is ascribed to the hydrophobic/hydrophilic match of the zeolite surface with the dye molecule, which depends upon the way zeolite is modified with HTAB. Calculations of the HTAB coverage on zeolite surface indicate that a bilayer formation is the most viable packing that enables maximum removal of the dye.
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Affiliation(s)
- Y E Benkli
- Mining Engineering Department, Istanbul Technical University, Maslak, 34469 Istanbul, Turkey
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Ozdemir FN, Micozkadioglu H, Arat Z, Turan M, Gulmus S, Haberal M. The importance of A3 allele in response to hepatitis B vaccine in end-stage renal disease patients. Transplant Proc 2004; 36:2615-7. [PMID: 15621103 DOI: 10.1016/j.transproceed.2004.09.063] [Citation(s) in RCA: 3] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
BACKGROUND Hemodialysis (HD) patients are at high risk for hepatitis B virus (HBV) infection due to intravenous interventions and therapies: Our aim was to examine how genetic factors affect the response to HBV vaccination in HD patients. METHODS The frequencies of HLA class I and II alleles were investigated in responders and nonresponders. Response to vaccination was defined as anti-HBsAg > 10 SI U/L (group I). Nonresponders (anti-HBsAg < 10 SI U/L) were defined as group II. The study included HD patients who were negative for antibodies to hepatitis B surface antigen during pretransplantation evaluation. RESULTS Group I consisting of 166 patients and group II, of 90 patients showed a significantly higher frequency of the HLA A3 allele in group I (n = 20) than group II (n = 3) (P = .02). There were no statistical differences between the two groups regarding age and gender distribution (P > .05). Graft outcome was not different between responders and nonresponders (P > .05). CONCLUSIONS This preliminary study shows that HLA alleles may have immunomodulatory effects in end-stage renal failure patients. The response to hepatitis B vaccination is affected in multifactorially fashion; HLA A3 may be a genetic predictor for responders, but further studies in larger series are required.
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Affiliation(s)
- F N Ozdemir
- Department of Nephrology, Baskent University School of Medicine, Ankara, Turkey
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Turan M, Sen M, Egilmez R. Pneumatosis cystoides intestinalis : report of two cases. Acta Chir Belg 2004; 104:742-4. [PMID: 15663289 DOI: 10.1080/00015458.2004.11679657] [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] [Indexed: 10/21/2022]
Abstract
We present two cases of Pneumatosis Cystoides Intestinalis (PCI) involving the small intestine: emergency operations was mandatory. At surgery, the affected ileal segments were resected. After surgery, clinical courses were uneventful. PCI is a sign, not a disease, and therefore its significance is directly related to the patient's overall clinical status. Treatment is not indicated in asymptomatic patients, whereas immediate surgical intervention is necessary in patients with abdominal catastrophes.
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Affiliation(s)
- M Turan
- Department of General Surgery, Cumhuriyet University, Faculty of Medicine, Sivas, Turkey.
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Sen M, Turan M, Karadayi K, Ugurlu L, Elagoz S. Isolated hepatic tuberculous pseudometastasis co-existent with adenocarcinoma of the stomach; report of a case. Acta Chir Belg 2004; 104:601-3. [PMID: 15571035 DOI: 10.1080/00015458.2004.11679626] [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] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
A 10 x 9 mm metastasis-like lesion in segment V of the liver was detected, when a 70-year-old man was operated on for adenocarcinoma of the stomach. Since exact diagnosis of the hepatic lesion could not be made by frozen sections, the lesion was excised, considering it to be a metastasis of gastric adenocarcinoma. Bacteriologic and pathologic studies established a diagnosis of isolated tuberculosis of the liver. A good response to antituberculous drug therapy was noted.
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Affiliation(s)
- M Sen
- Department of General Surgery, Cumhuriyet University Faculty of Medicine General Hospital, Sivas, Turkey
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Gulsen H, Turan M. Startup of an anaerobic fluidized bed reactor for landfill leachate treatment. Environ Technol 2004; 25:1107-1114. [PMID: 15551824 DOI: 10.1080/09593332508618388] [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] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Anaerobic treatment of the young landfill leachate in a pilot-scale fluidized bed reactor was performed to observe the effects of startup on COD removal, biogas production and biomass attachment. During the experiments, the organic loading rate (OLR) was increased gradually from 2.5 to 27 g COD l(-1) day(-1) with varying the feed rate and the hydraulic retention time in the range of 5.5-13 1 day(-1) and 1-2.35 days, respectively. The anaerobic fluidized bed reactor (AFBR) showed an excellent performance and attained steady state conditions with COD removal of 90% after 80 days. Biogas production in the reactor continuously increased and its average yield (Y(gas)) was defined as 0.531 biogas g(-1) COD(rem)(-1) with a correlation of 99%. Greater microbial attachment was found at the increased loading rates and the attached biomass concentration (X(attach)) consisted of about 90% of the total biomass concentration. In addition, the substrate utilization rate indicated a linear increase as a function of time during the process.
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Affiliation(s)
- H Gulsen
- Istanbul Technical University, Faculty of Civil Engineering, Department of Environmental Engineering, 34469, Maslak, Istanbul, Turkey
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Abstract
Peripancreatic tuberculous lymphadenitis is a rare clinical entity and it usually raises serious diagnostic problems. We report a case of a solitary abdominal tuberculoma. A 45-year old woman was admitted to hospital with obstructive jaundice. An exploratory laparotomy was performed. A conglomerated mass, penetrating into the pancreas was found. Since exact diagnosis could not be obtained by peroperative frozen sections, standard Whipple procedure, segmental portal vein resection and reconstruction with autogenous saphenous vein were performed. Histopathological examination of the resected specimen revealed tuberculous lymphadenitis. The patient was given an anti-tuberculous treatment and a good response was noted. Abdominal tuberculoma is often mistaken for a malignant neoplasm and a high grade of suspicion is neccessary in order to make the exact diagnosis and optimal medical treatment of this entity.
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Affiliation(s)
- M Sen
- Department of General Surgery, Cumhuriyet University Faculty of Medicine, Sivas, Turkey
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Turan M, Sen M, Karadayi K, Koyuncu A, Topcu O, Yildirir C, Duman M. Our sigmoid colon volvulus experience and benefits of colonoscope in detortion process. Rev Esp Enferm Dig 2004; 96:32-5. [PMID: 14971995 DOI: 10.4321/s1130-01082004000100005] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
BACKGROUND/AIMS The sigmoid colon is the most frequent site for a volvulus. In this report, we review our experience with sigmoid colon volvulus. METHODOLOGY We present our experience of 81 cases of sigmoid volvulus admitted to our department. RESULTS Preoperative endoscopic volvulus detortion was attempted in all patients, and in 39 of them the procedure was successful. The success rate of endoscopic detortion for sigmoid colon volvulus with a flexible colonoscope (60%) was higher than with a rigid rectosigmoidoscope (42%). In 19 of these 39 non-operatively devolvulated patients, sigmoid resection with primary anastomosis was performed within 7-10 days after reduction, but 20 patients did not accept the elective operation after a non-operative treatment. Among the 61 patients undergoing urgent or elective operation for sigmoid volvulus, there were 17 laparotomies with only detortion, 19 resections with elective anastomosis, 6 resections with primary anastomosis, and 19 resections with a Hartmann's pouch. There were 9 deaths (21%) among 42 patients who underwent an emergency operation, and one (5.2%) among the 19 patients who had elective surgery died because of a cerebral embolus. CONCLUSIONS Initial therapy with endoscopy affords decompression and an adequate preparation of patients for surgical resection, and a flexible colonoscope has notable advantages over rigid instruments for the detortion process.
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Affiliation(s)
- M Turan
- University Faculty of Medicine, Department of General Surgery, Sivas, Turkey.
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Karadayi K, Turan M, Canbay E, Topcu O, Sen M. Laparoscopic versus Open Appendectomy: Analysis of Systemic Acute-Phase Responses in a Prospective Randomized Study. Visc Med 2004. [DOI: 10.1159/000076078] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
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Turan M, Armağan B, Ozdemir O, Celik MS. Mesoporous mineral columns for color removal from aqueous solutions. J Environ Sci Health A Tox Hazard Subst Environ Eng 2004; 39:2221-2228. [PMID: 15332680 DOI: 10.1081/ese-120039386] [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] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
The removal efficiency of natural minerals (e.g., zeolite and sepiolite) from aqueous solutions of azo dyes was investigated. The adsorption of three types of reactive dyes, Black, Red, and Yellow dissolved in distilled and/or deionized water on zeolite and sepiolite have been performed using column adsorption experiments. Distilled water containing 50 mg/L dyestuff was used to identify the ability of natural mesoporous minerals and their modified forms. The adsorption results indicate that both natural sepiolite and zeolite have limited adsorption capacities of the reactive dyes but are substantially improved upon modifying their surfaces with quaternary amines (HTAB). The removal of Yellow dye showed an excellent performance in sepiolite column compared to that in zeolite column.
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Affiliation(s)
- M Turan
- Department of Environmental Engineering, Istanbul Technical University, Maslak, Istanbul, Turkey
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Topcu O, Canbay E, Turan M, Arici S, Sumer Z, Sen M. Inflammatory Pseudotumor of the Sigmoid Colon by <i>Enterobius vermicularis:</i> A Case Report. Visc Med 2004. [DOI: 10.1159/000081235] [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: 11/19/2022] Open
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Caliskaner Z, Ozturk S, Turan M, Karaayvaz M. Skin test positivity to aeroallergens in the patients with chronic urticaria without allergic respiratory disease. J Investig Allergol Clin Immunol 2004; 14:50-4. [PMID: 15160442] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/29/2023] Open
Abstract
The etiology of chronic urticaria and angioedema remains uncertain in most of the patients. There are several agents and factors including medications, foods and food additives, infections, contactants, inhalants, physical factors and autoimmunity that implicated in provoking urticaria symptoms. In addition, the possible role of house dust mites has been considered in a few reports. We investigated skin test positivity to house dust mites and other inhalants in 259 patients with chronic idiopathic urticaria and angioedema but without allergic rhinitis and/or asthma. Results were compared with both 300 healthy controls and 300 atopic patients. Immediate cutaneous reactivity to one or more allergens was detected in 71 patients in the study group (27.4%). The most common allergens were house dust mites (24.7%). Skin prick test sensitivity to other inhalant allergens including pollens, molds and cockroach were 7.7%, 0.4% and 0.8%, respectively. In the healthy control group 7% of patients were found as atopic with respect to skin prick test results. The most common allergens in healthy controls were pollens (6%), and house dust mites (4.7%). In atopic control group, pollens and mites are also the most common allergens detected in skin prick test (62% and 50.3%, respectively). The difference between study and healthy control group was statistically significant with respect to presence of atopy and mite sensitivity (p < 0.001). Similar differences were not established in other inhalant allergens. Significant mite sensitivity in the study group is not a coincidence. Because, ratio of skin test positivity to house dust mites in the study group was higher than the healthy controls, but was not as high as atopic patients. Furthermore, the rate of skin reactivity to other aeroallergens was not different from healthy controls. Urticaria as a sole clinical manifestation in mite sensitive patients was unusual.
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Affiliation(s)
- Z Caliskaner
- Department Allergy, Gülhane Military Medical Academy and Medical Faculty, Ankara, Türkiye.
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Gulsen H, Turan M, Armagan B. Anaerobic fluidized bed reactor for the treatment of landfill leachates. J Environ Sci Health A Tox Hazard Subst Environ Eng 2004; 39:2195-2204. [PMID: 15332678 DOI: 10.1081/ese-120039384] [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] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Treatability of the sanitary young landfill leachate in a pilot-scale anaerobic fluidized bed reactor during reactor startup and steady-state phases was investigated. All runs were carried out at 35 degrees C due to environmental conditions in the mesophilic anaerobic fluidized bed reactor (AFBR) while organic loading rate (OLR) was increased from 2.5 to 37gCOD/L-day during the 220 days of operation. The AFBR process attained steady-state conditions about on day 80 and a good and stable COD removal were achieved at about 90%. Biogas production in the bed continuously increased during the process. The mean specific biogas production was found 0.52 L biogas/gCODrem while the methane content was about 75%. The attached biomass concentration, measured as volatile solids rapidly increased as containing about 90% of the total biomass concentration. Furthermore, an increase in the suspended solid concentration was found as an evidence of biomass detachment from the media.
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Affiliation(s)
- H Gulsen
- Environmental Engineering Department, Istanbul Technical University, Maslak, Istanbul, Turkey
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Arat Z, Sezer S, Ozdemir FN, Uyar M, Turan M, Haberal M. Predictors of hematopoietic response after renal transplantation. Transplant Proc 2003; 35:2716-7. [PMID: 14612088 DOI: 10.1016/j.transproceed.2003.09.078] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Z Arat
- Baskent University Faculty of Medicine, Department of Nephrology, Ankara, Turkey
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Sezer S, Ozdemir FN, Külah E, Colak T, Turan M, Haberal M. Do serum albumin and aminotransferase levels predict renal graft outcome: a 5-year follow-up. Transplant Proc 2003; 35:2607-8. [PMID: 14612037 DOI: 10.1016/j.transproceed.2003.09.080] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Affiliation(s)
- S Sezer
- Başkent University Faculty of Medicine, Department of Nephrology, Ankara, Turkey
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