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Cay S, Ozeke O, Kara M, Ozcan F, Aras D, Topaloglu S. 073_16957-H5 Association of the P/PR Segment in Lead DII (Macruz Index) and the Terminal Segment of the P Wave in Lead V1 (Morris Index) With Recurrence in Patients Underwent Paroxysmal Atrial Fibrillation Ablation Using Cryoballoon. JACC Clin Electrophysiol 2017. [DOI: 10.1016/j.jacep.2017.09.117] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Gürçay E, Kara M, Kaymak B, Soylu AR, Özçakar L. Prompt sonographic scanning and quantification of lumbar muscles: Seeing the butterfly. Scand J Med Sci Sports 2017; 28:1314. [PMID: 28801988 DOI: 10.1111/sms.12959] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- E Gürçay
- Department of Physical and Rehabilitation Medicine, Gaziler Education and Research Hospital, Ankara, Turkey
| | - M Kara
- Department of Physical and Rehabilitation Medicine, Hacettepe University Medical School, Ankara, Turkey
| | - B Kaymak
- Department of Physical and Rehabilitation Medicine, Hacettepe University Medical School, Ankara, Turkey
| | - A R Soylu
- Department of Biophysics, Hacettepe University Medical School, Ankara, Turkey
| | - L Özçakar
- Department of Physical and Rehabilitation Medicine, Hacettepe University Medical School, Ankara, Turkey
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Kara M, Öztoprak N, Seçgin A, Sayer S, Yeni ÇE. Mathematical Modelling of Vibration Response Characteristics for Dissimilar Hot Plate Welded Polyamide 6 Composite Beams. INT POLYM PROC 2017. [DOI: 10.3139/217.3409] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Abstract
This study is concerned with the mathematical modelling of the vibration response characteristic of a special dissimilar composite beam based on experimental modal analysis. Here, experimental modal analyses of three different dissimilar polyamide 6 composite beams, which are connected to each other by hot plate welding are performed. The measured natural frequencies are compared with finite element predictions for verification purposes. Modal information obtained by experiments is used to construct a mathematical model representing vibration response characteristic of beams by applying multi degree of freedom curve fitting method. The model showing modal characteristics of dissimilar beams is now ready to be used in different kinds of excitations to predict the frequency response of vibration.
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Affiliation(s)
- M. Kara
- Department of Mechanical Engineering , Dokuz Eylul University, Izmir , Turkey
| | - N. Öztoprak
- Department of Mechanical Engineering , Dokuz Eylul University, Izmir , Turkey
| | - A. Seçgin
- Department of Mechanical Engineering , Dokuz Eylul University, Izmir , Turkey
| | - S. Sayer
- Ege Vocational School , Ege University, Izmir , Turkey
| | - Ç. E. Yeni
- Department of Mechanical Engineering , Dokuz Eylul University, Izmir , Turkey
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de Bakker BS, Phoa SSKS, Kara M, Al-Eryani S, Gielen ME, Ponsioen CIJ, de Bakker HM, van Gulik TM. The vanishing duodenal polyp: mesenteric invagination presenting as duodenal pseudopolyp. BMJ Case Rep 2017; 2017:bcr-2016-214998. [PMID: 28501824 DOI: 10.1136/bcr-2016-214998] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023] Open
Abstract
Duodenal polypoid masses are an uncommon finding mainly diagnosed incidentally at endoscopy or surgery. We report a 39-year-old female patient with symptoms of intermittent stabbing pain in the upper right abdominal quadrant and an iron deficiency anaemia, without complaints of weight loss, haematemesis or melaena. A duodenal polyp and acute duodenitis have been described during endoscopic examinations and CT and ultrasound. Surgical excision of the polyp was advised. Intraoperatively, an elongated duodenum was remarkable; however, at duodenotomy, no polyp was found, nor during intraoperative endoscopy. Looking back at the endoscopy and imaging results, it was noted that the polyp varied in size and location. It was therefore concluded that we dealt with the pseudopolyp phenomenon, caused by invagination of the duodenal wall and its mesentery into the duodenum, presenting as a lipomatous pseudopolyp. Telescopic invagination of the duodenal wall was facilitated by the elongated hypermobile duodenum.
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Affiliation(s)
- Bernadette S de Bakker
- Division of Anatomy, Embryology and Physiology, Academic Medical Center, University of Amsterdam, Amsterdam, The Netherlands
| | - Saffire S K S Phoa
- Division of Radiology, Academic Medical Center, University of Amsterdam, Amsterdam, The Netherlands
| | - Mohammed Kara
- Department of Gastroenterology, MC Zuiderzee, Lelystad, The Netherlands
| | - Sabaa Al-Eryani
- Department of Gastroenterology, MC Zuiderzee, Lelystad, The Netherlands
| | - Marieke E Gielen
- Division of Gastroenterology, Academic Medical Center, University of Amsterdam, Amsterdam, The Netherlands
| | - Cyriel I J Ponsioen
- Division of Gastroenterology, Academic Medical Center, University of Amsterdam, Amsterdam, The Netherlands
| | - Henri M de Bakker
- Department of Radiology, Groene Hart Hospital, Gouda, The Netherlands
| | - Thomas M van Gulik
- Division of Surgery, Academic Medical Center, University of Amsterdam, Amsterdam, The Netherlands
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Yildizgören MT, Ekiz T, Nizamogullari S, Turhanoglu AD, Guler H, Ustun N, Kara M, Özçakar L. Effects of habitual knuckle cracking on metacarpal cartilage thickness and grip strength. Hand Surg Rehabil 2017; 36:41-43. [PMID: 28137441 DOI: 10.1016/j.hansur.2016.09.001] [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] [Subscribe] [Scholar Register] [Received: 05/31/2016] [Revised: 07/07/2016] [Accepted: 09/03/2016] [Indexed: 10/20/2022]
Abstract
Joint cracking involves a manipulation of the finger joints resulting in an audible crack. This study aimed to determine whether habitual knuckle cracking (KC) leads to an alteration in grip strength and metacarpal head (MH) cartilage thickness. Thirty-five habitual knuckle crackers (cracking their joints ≥5times/day) (20 M, 15 F, aged 19-27 years) and 35 age-, gender-, and body mass index-matched non-crackers were enrolled in the study. MH cartilage thickness was measured with ultrasound and grip strength was measured with an analog Jamar hand dynamometer. Grip strength was similar between groups (P>0.05). Habitual knuckle crackers had thicker MH cartilage in the dominant and non-dominant hands than those of the controls (P=0.038 and P=0.005, respectively). There was no correlation between MH cartilage thickness and grip strength in both groups (P>0.05). While habitual KC does not affect handgrip strength, it appears to be associated with increased MH cartilage thickness.
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Affiliation(s)
- M T Yildizgören
- Mustafa Kemal University Medical School, Department of Physical Medicine and Rehabilitation, Hatay, Turkey.
| | - T Ekiz
- Elbistan State Hospital, Department of Physical Medicine and Rehabilitation, Kahramanmaraş, Turkey
| | - S Nizamogullari
- Mustafa Kemal University Medical School, Department of Physical Medicine and Rehabilitation, Hatay, Turkey
| | - A D Turhanoglu
- Mustafa Kemal University Medical School, Department of Physical Medicine and Rehabilitation, Hatay, Turkey
| | - H Guler
- Mustafa Kemal University Medical School, Department of Physical Medicine and Rehabilitation, Hatay, Turkey
| | - N Ustun
- Mustafa Kemal University Medical School, Department of Physical Medicine and Rehabilitation, Hatay, Turkey
| | - M Kara
- Hacettepe University Medical School, Department of Physical Medicine and Rehabilitation, Ankara, Turkey
| | - L Özçakar
- Hacettepe University Medical School, Department of Physical Medicine and Rehabilitation, Ankara, Turkey
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Ozcagli E, Kara M, Kotil T, Alpertunga B. Determination of telomerase activity and associated TERT, PTEN protein expressions in stanozolol exposed rat liver. Toxicol Lett 2016. [DOI: 10.1016/j.toxlet.2016.06.1527] [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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58
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Canbek U, Imerci A, Kara M, Akgun U, Canbek TD, Aydogan NH. Polymorphisms in ADAMTS4 and ADAMTS5 are not linked to susceptibility to knee osteoarthritis in the Turkish population. Genet Mol Res 2016; 15:gmr8264. [PMID: 27706574 DOI: 10.4238/gmr.15038264] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Considering the functions of aggrecanase-1 (ADAMTS4) and -2 (ADAMTS5), which are thought to be the two major enzymes responsible for the destruction of aggrecans in arthritic diseases, we investigated whether important polymorphisms in the ADAMTS4 and ADAMTS5 genes affect osteoarthritis (OA) susceptibility. Our study took place in Mugla, Turkey. Ninety-five cases were recruited following OA diagnosis (72 women and 23 men), and 80 individuals without any symptoms or radiographic signs of OA (56 women and 24 men) were chosen as healthy controls. After obtaining DNA from patients and control subjects, ADAMTS4 and ADAMTS5 genotypes were determined using the ABI Prism StepOnePlus Real-Time system. In addition, we categorized patients based on OA grade. There were no significant differences in the genotype distributions of the four polymorphisms between the groups (P > 0.05). Moreover, ADAMTS4 and ADAMTS5 allele frequencies did not differ between OA and control participants (P > 0.05). These findings suggest that the ADAMTS4 (rs4233367 and rs11807350) and ADAMTS5 (rs226794 and rs2830585) variants examined may not contribute to susceptibility to knee OA in the Turkish population. Other gene polymorphisms should be assessed in order to explain variations in OA susceptibility.
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Affiliation(s)
- U Canbek
- Department of Orthopedics and Traumatology, Faculty of Medicine, Mugla Sitki Kocman University, Mugla, Turkey
| | - A Imerci
- Department of Orthopedics and Traumatology, Faculty of Medicine, Mugla Sitki Kocman University, Mugla, Turkey
| | - M Kara
- Department of Medical Genetics, Faculty of Medicine, Mugla Sitki Kocman University, Mugla, Turkey
| | - U Akgun
- Department of Orthopedics and Traumatology, Faculty of Medicine, Mugla Sitki Kocman University, Mugla, Turkey
| | - T D Canbek
- Department of Internal Medicine, Mugla Sitki Kocman University Education and Researh Hospital, Mugla, Turkey
| | - N H Aydogan
- Department of Orthopedics and Traumatology, Faculty of Medicine, Mugla Sitki Kocman University, Mugla, Turkey
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Ulusoy HB, Sonmez MF, Kilic E, Caliskan K, Karaca B, Kara M, Ercal O, Gunduz Y, Karabulut D, Bitiktas S, Tan B, Kavraal S, İnal A, Suer C. Intraperitoneal Administration of Low Dose Aluminium in The Rat: How Good is It to Produce a Model for Alzheimer Disease. Arch Ital Biol 2016; 153:266-78. [PMID: 27168412 DOI: 10.12871/00039829201543] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Since neurotoxicity of aluminium (Al) resembles the progressive neurodegeneration observed in Alzheimer Disease (AD), Al administration in several ways has been used to produce AD model. Intraperitoneal (ip) low dose (4.2 mg/ kg) Al injection in rats for long periods is the preferred method by some researchers. In this paper, the efficiency of this method for producing an AD model was evaluated. In this study, we looked at the neuropathology of Al and the characteristic lesions of AD by histological and immunohistochemical techniques and determined oxidative stress markers in the brains of Al-treated and control rats. We also made electrophysiological recordings at the hippocampus and evaluated possible behavioural changes by Morris water maze test. However, no pathologic changes occurred in the animals except for an impairment in long-term potentiation (LTP) in the hippocampus (e.g. the LTPs of population spike (PS) amplitude at 15 min post-tetanus were measured as 217±27% in Al-treated rats and as 240±42% in sham-treated rats, of baseline PS amplitude). According to the findings of the present study, low dose of ip Al in rats is not sufficient to produce a good AD model. Higher doses (≥10 mg/kg) should be used.
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Değirmenci B, Kara M, Kıdır V, İnal S, Sezer T, Umul A, Orhan H, Çelik AO, Demirtaş H, Yilmaz Ö. Unenhanced respiratory-navigated NATIVE ® TrueFISP magnetic resonance angiography in the evaluation of renal arteries: Comparison with contrast-enhanced magnetic resonance angiography. Diagn Interv Imaging 2016; 98:133-140. [PMID: 27503115 DOI: 10.1016/j.diii.2016.06.013] [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] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2016] [Revised: 06/27/2016] [Accepted: 06/29/2016] [Indexed: 10/21/2022]
Abstract
PURPOSE To compare unenhanced three-dimensional (3D) NATIVE® true fast imaging with steady-state precession (TrueFISP) magnetic resonance (MR) angiography with the more conventional MR angiography technique obtained after intravenous administration of a gadolinium chelate in the evaluation of renal arteries and their branches in patients with suspected renal artery stenosis. MATERIALS AND METHODS A total of 39 patients (25 men, 14 women) with a mean age of 51.4±17.5years (SD) (range: 10-82years) were included in the study. All patients with suspected renal artery stenosis underwent unenhanced 3D NATIVE® TrueFISP MR angiography and contrast-enhanced MR angiography. The two MR angiography methods were compared by two independent readers for image quality using a four-point scale, diagnostic performance and grading of renal artery stenosis on a total of 78 renal arteries. RESULTS For both readers image quality of unenhanced 3D NATIVE® TrueFISP MR angiography (3.12 to 3.63) was greater than that of contrast-enhanced MR angiography (1.94 to 2.71) for renal artery ostium-trunk and the left renal artery segmental branches. The sensitivity of 3D NATIVE® TrueFISP MR angiography for the diagnosis of renal artery stenosis was 100% for both readers for the right renal artery and 66% and 80% for the left renal artery for reader 1 and reader 2, respectively. Agreement between 3D NATIVE® TrueFISP MR angiography and CE-MR angiography was 95% (74/78) for reader 1 and 92% (72/78) for reader 2. CONCLUSION Unenhanced NATIVE® TrueFISP magnetic resonance angiography can play an additional role in the evaluation of renal arteries in patients with hypertension, especially in subjects at risk of nephrogenic systemic fibrosis.
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Affiliation(s)
- B Değirmenci
- Department of radiology, school of medicine, Süleyman Demirel university, 32260 Isparta, Turkey.
| | - M Kara
- Department of radiology, school of medicine, Süleyman Demirel university, 32260 Isparta, Turkey
| | - V Kıdır
- Department of nephrology, Dumlupınar university, Kütahya Evliya Celebi training and research hospital, Kütahya, Turkey
| | - S İnal
- Department of nephrology, school of medicine, Süleyman Demirel university, Isparta, Turkey
| | - T Sezer
- Department of nephrology, school of medicine, Süleyman Demirel university, Isparta, Turkey
| | - A Umul
- Department of radiology, school of medicine, Süleyman Demirel university, 32260 Isparta, Turkey
| | - H Orhan
- Department of biostatistics, school of medicine, Süleyman Demirel university, Isparta, Turkey
| | - A O Çelik
- Department of radiology, school of medicine, Süleyman Demirel university, 32260 Isparta, Turkey
| | - H Demirtaş
- Department of radiology, school of medicine, Süleyman Demirel university, 32260 Isparta, Turkey
| | - Ö Yilmaz
- Department of radiology, school of medicine, Süleyman Demirel university, 32260 Isparta, Turkey
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Kayan M, Demirtas H, Türker Y, Kayan F, Çetinkaya G, Kara M, Orhan Çelik A, Umul A, Yılmaz Ö, Recep Aktaş A. Carotid and cerebral CT angiography using low volume of iodinated contrast material and low tube voltage. Diagn Interv Imaging 2016; 97:1173-1179. [PMID: 27421672 DOI: 10.1016/j.diii.2016.06.005] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [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: 02/01/2016] [Revised: 06/12/2016] [Accepted: 06/14/2016] [Indexed: 01/26/2023]
Abstract
PURPOSE To evaluate image quality of carotid computed tomography angiography (CTA) using a low voltage (80kV) and low amount of iodinated contrast material. MATERIALS-METHODS A total of 101 patients referred for carotid CTA were randomly assigned to receive a specific protocol. In group A patients received intravenous administration of contrast material at a dose of 1mL/kg and CTA examinations were performed at 100kV. In group B, patients received intravenous administration of contrast material at a dose of 0.5mL/kg and CTA examinations were performed at 80kV. The same nonionic iodinated contrast material containing 370mg of iodine per mL was used in both groups. Attenuation values were measured from the center of specific arterial segments using regions of interest. Attenuation values above 300HU were accepted as significant. Institutional review board approval was obtained. RESULTS A total of 50 patients were included in group A (38 men, 12 women; mean age, 63.56 years±13.18 [SD]) and 51 patients in group B (33 men, 18 women; mean age, 59.60 years±16.63 [SD]). A total of 1615 arterial segments (1515 common carotid artery-middle cerebral artery and 101 aortic arches) were analyzed. Venous contamination was not observed in either group. The mean attenuation values of all arterial segments in both groups were greater than 300HU. Mean arterial attenuation value in group B (499.22HU±97.25 [SD]) was significantly greater than in group A (374.36HU±73.79 [SD]) (P<0.01). Hemodynamically significant stenosis (grade III stenosis or >70%) was detected in 2 segments in group A and in 3 segments in group B, while grade IV stenosis (occlusion) was detected in 2 segments in group B. Distal common carotid artery dissection was detected in 1 patient and aortic dissection was detected in 1 patient in group B. Total dose-length product (DLP) value was significantly greater in group A (225.74mGy·cm±21.80 [SD]) than in group B (116.60mGy·cm±21.22 [SD]) (P<0.01). The mean tube current was similar in group A (2013.11mAs±195.92 [SD]) and in group B (2096.64 mAs±309.03 [SD]) (P<0.05). CONCLUSION Carotid and cerebral CTA examinations using 128-section CT can be successfully obtained using an imaging protocol that combines low voltage and 50% reduction in the volume of iodinated contrast material. This provides good image quality with low radiation dose.
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Affiliation(s)
- M Kayan
- Department of Radiology, Faculty of Medicine, Süleyman Demirel University, 32260 Isparta, Turkey.
| | - H Demirtas
- Department of Radiology, Faculty of Medicine, Süleyman Demirel University, 32260 Isparta, Turkey.
| | - Y Türker
- Department of Cardiology, Faculty of Medicine, Süleyman Demirel University, 32260 Isparta, Turkey.
| | - F Kayan
- Clinic of Chest Diseases, Isparta State Hospital, Isparta, Turkey.
| | - G Çetinkaya
- Department of Radiology, Faculty of Medicine, Süleyman Demirel University, 32260 Isparta, Turkey.
| | - M Kara
- Department of Radiology, Faculty of Medicine, Süleyman Demirel University, 32260 Isparta, Turkey.
| | - A Orhan Çelik
- Department of Radiology, Faculty of Medicine, Süleyman Demirel University, 32260 Isparta, Turkey.
| | - A Umul
- Department of Radiology, Faculty of Medicine, Süleyman Demirel University, 32260 Isparta, Turkey.
| | - Ö Yılmaz
- Department of Radiology, Faculty of Medicine, Süleyman Demirel University, 32260 Isparta, Turkey.
| | - A Recep Aktaş
- Department of Radiology, Faculty of Medicine, Süleyman Demirel University, 32260 Isparta, Turkey.
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Bayram D, Çetin ES, Kara M, Özgöçmen M, Candan IA. The apoptotic effects of silibinin on MDA-MB-231 and MCF-7 human breast carcinoma cells. Hum Exp Toxicol 2016; 36:573-586. [DOI: 10.1177/0960327116658105] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Background: Silibinin is a bioactive flavonolignan extracted from milk thistle, known as Silybum marianum. Silibinin exerts strong antiproliferative, proapoptotic, and anti-inflammatory effects. Many studies have shown that silibinin inhibits experimentally induced malignancies of the liver, prostate, skin, and colon as well as promotes inhibition of the proliferation of cancer cell lines in vitro. This study aimed to investigate the effects of silibinin on the human breast carcinoma cell lines MDA-MB-231 and MCF-7 in monolayer and spheroid cultures. Method: The MDA-MB-231 and MCF-7 cell lines were cultured in both monolayer and spheroid cultures. Cells were treated with silibinin at 24, 48, and 72 h of incubation. The 5-bromo-2′-deoxyuridine labeling index was used to determine the cells of the synthesis phase. Poly-ADP-ribose-polimerase immunohistochemical staining and the terminal deoxynucleotidyl transferase dUTP nick and labeling assay were used to determine the death of cells in both the monolayer and spheroid cultures. Results: An half maximal inhibitory concentration dose of silibinin in MDA-MB-231 and MCF-7 cells was 100 µM/mL at 24, 48, and 72 h of incubation. Terminal deoxynucleotidyl transferase dUTP nick and labeling positive cells and active poly-ADP-ribose-polimerase were detected after treatment with silibinin in both the monolayer and spheroid cultures. The dead cell count was higher in the MDA-MB-231 and MCF-7 cell lines with silibinin applied than in the controls. Conclusions: Our study demonstrated that silibinin applications enhanced terminal deoxynucleotidyl transferase dUTP nick and labeling positive cells and active poly-ADP-ribose-polimerase in comparison to the control in both the monolayer and spheroid cultures.
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Affiliation(s)
- D Bayram
- Süleyman Demirel University, Faculty of Medicine, Department of Histology and Embryology, Isparta, Turkey
| | - ES Çetin
- Muğla Sitki Koçman University, Faculty of Medicine, Department of Medical Biology, Muğla, Turkey
| | - M Kara
- Muğla Sitki Koçman University, Faculty of Medicine, Department of Medical Genetic, Muğla, Turkey
| | - M Özgöçmen
- Süleyman Demirel University, Faculty of Medicine, Department of Histology and Embryology, Isparta, Turkey
| | - IA Candan
- Süleyman Demirel University, Faculty of Medicine, Department of Histology and Embryology, Isparta, Turkey
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Demirtaş H, Değirmenci B, Çelik A, Umul A, Kara M, Aktaş A, Parpar T. Anatomic variations of popliteal artery: Evaluation with 128-section CT-angiography in 1261 lower limbs. Diagn Interv Imaging 2016; 97:635-42. [DOI: 10.1016/j.diii.2016.02.014] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2016] [Revised: 02/10/2016] [Accepted: 02/11/2016] [Indexed: 11/26/2022]
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Içik F, Kara M, Tunçôzgûr B, Dizbay Sak S, Erekul S, Kavukçu Ş. Significance of Ligature Technique on the Formation of Pulmonary Artery Stump Thrombosis in a Canine Model. Acta Chir Belg 2016. [DOI: 10.1080/00015458.2005.11679700] [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)
- F. Içik
- Department of Thoracic Surgery Van Yuzuncuyil University
| | - M. Kara
- Department of Thoracic Surgery University of Kirikkale
| | - B. Tunçôzgûr
- Department of Thoracic Surgery University of Gaziantep
| | - S. Dizbay Sak
- Department of Pathology, Ankara University School of Medicine
| | - S. Erekul
- Department of Pathology, Ankara University School of Medicine
| | - Ş. Kavukçu
- Department of Thoracic Surgery, Ankara University School of Medicine
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Demir T, Ozel L, Gökçe AM, Ata P, Kara M, Eriş C, Özdemir E, Titiz MI. Cancer Screening of Renal Transplant Patients Undergoing Long-Term Immunosuppressive Therapy. Transplant Proc 2016; 47:1413-7. [PMID: 26093731 DOI: 10.1016/j.transproceed.2015.04.073] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
OBJECTIVE With this study we aimed to research the effects of immunosuppressive drugs, their cumulative doses, and viral infections on development of malign tumors in patients who have undergone treatment for 5 years. METHODS We examined 100 patients who underwent renal transplantation from 2004 to 2009. Patients had mycophenolate mofetil and steroid in addition to cyclosporine, sirolimus, or tacrolimus as immunosuppressive treatment. For malignancy screening, physical examination, radiologic and endoscopic screening were done, and immunosuppressive drugs and their cumulative doses, age, sex, body mass index (BMI), dialysis history, and viral infection history were investigated. RESULTS The mean age of patients was 42.03 ± 11.30 years. There were 1 colon cancer patient, 1 retroperitoneal liposarcoma, 1 renal oncocytoma, 3 Kaposi sarcoma patients treated with cyclosporine; in those treated with Tac there were 1 basal cell carcinoma, 1 Kaposi sarcoma, 2 thyroid carcinoma, 1 breast carcinoma, 1 bladder carcinoma, 1 renal cell carcinoma, and 1 colon carcinoma patients. The mean age of patients having carcinoma was statistically significant compared with those without cancer (P < .01). The prednisolone cumulative dose was significantly higher in carcinoma patients than in patients without carcinoma (P < .01). RESULTS The use of long-term chronic immunosuppressive therapy may increase the development of cancer. The risk of carcinoma increases with increasing drug dose and time period of the immunosuppressive drug. There was not a negative effect on cancer prevalence in patients with cyclosporine or tacrolimus. But the cumulative dose of steroids significantly increased malignancy occurence.
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Affiliation(s)
- T Demir
- Department of General Surgery and Transplantation, Haydarpasa Numune Training and Research Hospital, Uskudar, Istanbul, Turkey
| | - L Ozel
- Department of General Surgery and Transplantation, Haydarpasa Numune Training and Research Hospital, Uskudar, Istanbul, Turkey.
| | - A M Gökçe
- Department of Urology and Transplantation, Haydarpasa Numune Training and Research Hospital, Uskudar, Istanbul, Turkey
| | - P Ata
- Department of Medical Genetics, Faculty of Medicine, Marmara University, Istanbul, Turkey; Tissue Typing Laboratory, Haydarpasa Numune Training and Research Hospital, Istanbul, Turkey
| | - M Kara
- Department of General Surgery and Transplantation, Haydarpasa Numune Training and Research Hospital, Uskudar, Istanbul, Turkey
| | - C Eriş
- Department of General Surgery and Transplantation, Haydarpasa Numune Training and Research Hospital, Uskudar, Istanbul, Turkey
| | - E Özdemir
- Department of General Surgery and Transplantation, Haydarpasa Numune Training and Research Hospital, Uskudar, Istanbul, Turkey
| | - M I Titiz
- Department of General Surgery and Transplantation, Haydarpasa Numune Training and Research Hospital, Uskudar, Istanbul, Turkey
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Karimova A, Oltulu YM, Azaklı H, Kara M, Ustek D, Tutluoglu B, Onaran I. Lack of association between increased mitochondrial DNA 4977 deletion and ATP levels of sputum cells from chronic obstructive pulmonary disease patients versus healthy smokers. Mitochondrial DNA A DNA Mapp Seq Anal 2015; 28:361-369. [PMID: 26713688 DOI: 10.3109/19401736.2015.1126826] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
In this study we looked at smokers with and without chronic obstructive pulmonary disease (COPD) patients in order to evaluate the incidence of 4977 base pair (bp) mtDNA (mtDNA4977) deletion and mtDNA copy number in sputum cells and in peripheral blood leukocytes (PBLs) in relation to mitochondrial function and oxidative stress status. Twenty-five COPD patients who were current smokers, 22 smokers and 23 healthy nonsmokers (for only PBLs studies) participated in this study. The 4977-bp deletion was detected in all examined samples within 40 cyles of PCR amplification, using a quantitative real time PCR. The frequency of the mtDNA4977 was significantly higher in the sputum cells of patients with COPD compared to smokers without COPD (p < 0.0001). This difference was not observed in PBLs. Levels of cellular oxidative stress were significantly higher in the sputum cells of subjects with COPD than in the smoker group. However, mtDNA copy number, mitochondrial membrane potential (ΔΨm) and cellular ATP levels in PBLs and sputum cells were not significantly different between the studied groups. The Pearson analysis revealed no correlations between the accumulation of mtDNA4977, and intracellular ATP content and ΔΨm values of the sputum cells, although there was a positive correlation between the increase in the percentage of deleted mtDNA4977 and the levels of cellular oxidative stress in COPD patients (r = 0.80, p < 0.0001). Our studies may suggest that the accumulation of mtDNA4977 in the sputum cells of smokers with COPD does not seem to have an important impact on mitochondrial dysfunction in relation to ATP production and ΔΨm when compared to those of healthy smokers.
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Affiliation(s)
- A Karimova
- a Department of Medical Biology and Genetics, Cerrahpasa Faculty of Medicine , Istanbul University , Istanbul , Turkey
| | - Y M Oltulu
- b Department of Nutrition and Dietetics, Health Sciences Faculty , Biruni University , Istanbul , Turkey
| | - H Azaklı
- c Department of Medical Genetics, School of Medicine , Istanbul Medipol University , Istanbul , Turkey
| | - M Kara
- d Department of Genetics, School of Medicine , Mugla University , Mugla , Turkey
| | - D Ustek
- c Department of Medical Genetics, School of Medicine , Istanbul Medipol University , Istanbul , Turkey
| | - B Tutluoglu
- e Department of Pneumology, Cerrahpasa Faculty of Medicine , Istanbul University , Istanbul , Turkey
| | - I Onaran
- a Department of Medical Biology and Genetics, Cerrahpasa Faculty of Medicine , Istanbul University , Istanbul , Turkey
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Aydin T, Kara M, Aran T, Turktekin N, Ozdemir B. The association between anti-Mullerian hormone and IVF-ICSI outcome in poor responder patients performing long protocol. CLIN EXP OBSTET GYN 2015. [DOI: 10.12891/ceog1975.2015] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022]
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68
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Alpertunga B, Kara M, Özçağlı E, Fragkiadaki P, Tsatsakis A. Determination of genotoxic effects of stanozolol in rats. Toxicol Lett 2015. [DOI: 10.1016/j.toxlet.2015.08.703] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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69
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Özçakar L, Kara M, Chang KV, Tok F, Hung CY, Akkaya N, Wu CH, Çarli AB, Hsiao MY, Tekin L, Wang TG, Ulaşlı AM, Chen WS, De Muynck M. EURO-MUSCULUS/USPRM. Basic scanning protocols for knee. Eur J Phys Rehabil Med 2015; 51:641-646. [PMID: 26351105] [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: 06/05/2023]
Abstract
In this protocol, the patient/probe positionings, anatomical drawings and ultrasound images of commonly scanned knee structures are described. This practical guide is prepared (with an international consensus of several expert physiatrists) to serve as a uniform/standard approach especially for beginner sonographers.
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Affiliation(s)
- L Özçakar
- Department of Physical and Rehabilitation Medicine, Hacettepe University Medical School, Ankara, Turkey -
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Özçakar L, Kara M, Chang KV, Akkaya N, Hung CY, Tok F, Wu CH, Çarli AB, Hsiao MY, Tekin L, Wang TG, Ulaşlı AM, Chen WS, De Muynck M. EURO-MUSCULUS/USPRM. Basic scanning protocols for hip. Eur J Phys Rehabil Med 2015; 51:635-640. [PMID: 26351107] [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: 06/05/2023]
Abstract
In this protocol, the patient/probe positionings, anatomical drawings and ultrasound images of commonly scanned hip structures are described. This practical guide is prepared (with an international consensus of several expert physiatrists) to serve as a uniform/standard approach especially for beginner sonographers.
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Affiliation(s)
- L Özçakar
- Department of Physical and Rehabilitation Medicine, Hacettepe University Medical School, Ankara, Turkey -
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Özçakar L, Kara M, Chang KV, Bayram Çarli A, Hung CY, Tok F, Wu CH, Akkaya N, Hsiao MY, Tekin L, Wang TG, Ulaşlı AM, Chen WS, De Muynck M. EURO-MUSCULUS/USPRM. Basic Scanning Protocols for Ankle and foot. Eur J Phys Rehabil Med 2015; 51:647-653. [PMID: 26351106] [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: 06/05/2023]
Abstract
In this protocol, the patient/probe positionings, anatomical drawings and ultrasound images of commonly scanned ankle/foot structures are described. This practical guide is prepared (with an international consensus of several expert physiatrists) to serve as a uniform/standard approach especially for beginner sonographers.
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Affiliation(s)
- L Özçakar
- Department of Physical and Rehabilitation Medicine, Hacettepe University Medical School, Ankara, Turkey -
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73
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Cayir A, Ugan RA, Albayrak A, Kose D, Akpinar E, Cayir Y, Atmaca HT, Bayraktutan Z, Kara M. The lung endothelin system: a potent therapeutic target with bosentan for the amelioration of lung alterations in a rat model of diabetes mellitus. J Endocrinol Invest 2015; 38:987-98. [PMID: 25847324 DOI: 10.1007/s40618-015-0282-y] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/22/2015] [Accepted: 03/24/2015] [Indexed: 01/14/2023]
Abstract
PURPOSE The aim of this study is to show the effect of a new mechanism on endothelin (ET) receptors in the physiopathology of diabetes-related pulmonary injury. We tested the hypothesis that dual ET-1 receptor antagonism via bosentan can reverse diabetes-induced lung injury. METHODS The rats (24 male) were separated into four groups: group 1 (HEALTHY): Control group; group 2 (DM): Streptozotocin 60 mg/kg (i.p.); group 3 (DM + BOS-1): Diabetes + bosentan 50 mg/kg per-os; group 4 (DM + BOS-2): Diabetes + bosentan 100 mg/kg per-os. The bosentan treatment was initiated immediately after the onset of STZ-induced diabetes and continued for 6 weeks. RESULTS In the treatment group, SOD activity was significantly increased, although GSH and MDA levels and TNF-α and TGF-β gene expression were decreased. Bosentan 50 mg/kg and bosentan 100 mg/kg showed a significantly down-regulatory effect on ET-1, ET-A, and ET-B mRNA expression. CONCLUSIONS In conclusion, increased endothelin levels in the lung associated with diabetes may be one cause of endothelial dysfunction, cytokine increase, and oxidant/antioxidant imbalance in the pathogenesis of complications that may develop during diabetes. With its multiple effects, bosentan therapy may be an effective option against complications that may develop in association with diabetes.
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Affiliation(s)
- A Cayir
- Department of Pediatric Endocrinology, Erzurum Regional Education and Research Hospital, 25100, Erzurum, Turkey,
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Özçakar L, Kara M, Chang KV, Hung CY, Tekın L, Ulaşlı AM, Wu CH, Tok F, Hsıao MY, Akkaya N, Wang TG, Çarli AB, Chen WS, De Muynck M. EURO-MUSCULUS/USPRM Basic Scanning Protocols for elbow. Eur J Phys Rehabil Med 2015; 51:485-489. [PMID: 26158916] [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: 06/04/2023]
Abstract
In this protocol, the patient/probe positionings, anatomical drawings and ultrasound images of commonly scanned elbow structures are described. This practical guide is prepared (with an international consensus of several expert physiatrists) to serve as a uniform/standard approach especially for beginner sonographers.
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Affiliation(s)
- L Özçakar
- Department of Physical and Rehabilitation Medicine, Hacettepe University Medical School, Ankara, Turkey -
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Özçakar L, Kara M, Wang TG, De Muynck M. EURO-MUSCULUS/USPRM Basic Scanning Protocols: a practical guide for physiatrists. Eur J Phys Rehabil Med 2015; 51:477-478. [PMID: 26173449] [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: 06/04/2023]
Affiliation(s)
- L Özçakar
- Department of Physical and Rehabilitation Medicine, Hacettepe University Medical School, Ankara, Turkey -
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Özçakar L, Kara M, Chang KV, Ulaşlı AM, Hung CY, Tekin L, Wu CH, Tok F, Hsiao MY, Akkaya N, Wang T, Çarli AB, Chen WS, De Muynck M. EURO-MUSCULUS/USPRM Basic Scanning Protocols for wrist and hand. Eur J Phys Rehabil Med 2015; 51:479-484. [PMID: 26158917] [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: 06/04/2023]
Abstract
In this protocol, the patient/probe positionings, anatomical drawings and ultrasound images of commonly scanned wrist/hand structures are described. This practical guide is prepared (with an international consensus of several expert physiatrists) to serve as a uniform/standard approach especially for beginner sonographers.
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Affiliation(s)
- L Özçakar
- Department of Physical and Rehabilitation Medicine, Hacettepe University Medical School, Ankara, Turkey -
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Özçakar L, Kara M, Chang KV, Tekin L, Hung CY, Ulaülı AM, Wu CH, Tok F, Hsiao MY, Akkaya N, Wang TG, Çarli AB, Chen WS, De Muynck M. EURO-MUSCULUS/USPRM Basic Scanning Protocols for shoulder. Eur J Phys Rehabil Med 2015; 51:491-496. [PMID: 26158915] [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: 06/04/2023]
Abstract
In this protocol, the patient/probe positionings, anatomical drawings and ultrasound images of commonly scanned shoulder structures are described. This practical guide is prepared (with an international consensus of several expert physiatrists) to serve as a uniform/standard approach especially for beginner sonographers.
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Affiliation(s)
- L Özçakar
- Department of Physical and Rehabilitation Medicine, Hacettepe University Medical School, Ankara, Turkey -
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78
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Özcan H, Akıncı A, Kara M, Tiftik T, Türkkan C, Öztürk M, Sungur G, Özçakar L. FRI0579 Dynamic Doppler Evaluation of the Hand and Digital Arteries in Patients with Behçet's Disease. Ann Rheum Dis 2015. [DOI: 10.1136/annrheumdis-2015-eular.1515] [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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79
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Kara M, Ekiz T, Tiftik T, Özel S, Özçakar L. Mirror movements in patients with hemiplegic cerebral palsy and porencephaly: when one hand becomes two hands. Minerva Pediatr 2015; 67:105-106. [PMID: 25602750] [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: 06/04/2023]
Affiliation(s)
- M Kara
- Ankara Physical Medicine and Rehabilitation Training and Research Hospital, Ankara, Turkey -
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Aydin T, Kara M, Aran T, Turktekin N, Ozdemir B. The association between anti-Müllerian hormone and IVF-ICSI outcome in poor responder patients performing long protocol. CLIN EXP OBSTET GYN 2015; 42:663-665. [PMID: 26524819] [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: 06/05/2023]
Abstract
PURPOSE OF INVESTIGATION Ovarian reserve reflects the capacity of the ovaries for a successful pregnancy. Anti-Müllerian hormone (AMH) could be a useful marker to predict ovarian reserve and to adjust controlled ovarian stimulation. The aim of this study was to assess the relationship between AMH and intracytoplasmic sperm injection-in vitro fertilization (IVF-ICSI) outcome in poor responder women. MATERIALS AND METHODS This study was conducted prospectively for a period of 12 months. Inclusion criteria were FSH value > 15 iu/l or antral follicle number < 4, on the 2nd day of cycle. All patients underwent GnRH agonist stimulation with long protocol. Serum AMH levels were measured in the treatment cycle just before the stimulation. After the treatment, patients who were pregnant formed the study group and patients who were not pregnant formed the control group. Serum AMH level was the main outcome measure. RESULTS The study and control group consisted of 34 and 70 patients, respectively. No significant difference was found in duration of infertility, antral follicular count, basal E2 and FSH levels. The mean serum AMH level was significantly higher in study group (p = 0.005). The retrieved oocyte number, metaphase 2 oocyte number, and fertilization rate were also significantly higher in the study group. DISCUSSION Evaluation of serum AMH seems to be a useful marker to predict IVF-ICSI outcome in poor responder patients.
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81
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Tasdemir S, Erdem HB, Sahin I, Kara M, Tatar A. WAARDENBURG SYNDROME TYPE 1 AND A RARE FINDING OF ANAL ATRESIA. Genet Couns 2015; 26:467-470. [PMID: 26852521] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
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82
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Tiftik T, Öztürk GT, Kara M, Türkkan C, Ersöz M, Özçakar L. Ultrasonographic evaluation of sciatic nerves in patients with spinal cord injury. Spinal Cord 2014; 53:75-7. [PMID: 25384399 DOI: 10.1038/sc.2014.191] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2014] [Revised: 10/01/2014] [Accepted: 10/03/2014] [Indexed: 11/09/2022]
Abstract
STUDY DESIGN Cross-sectional, controlled study. OBJECTIVE To evaluate the sciatic nerves of subjects with spinal cord injury (SCI) by using ultrasound (US) imaging and to explore whether US measurements are associated with clinical and electrophysiological findings. SETTING National Rehabilitation Center in Ankara, Turkey. METHODS Fifteen SCI subjects (12 male (M), 3 female (F)) and 23 (16 M, 7 F) healthy controls were included in the study. After clinical assessment of the subjects, lower limb nerve conduction studies and US imaging of the sciatic nerves were performed. Cross-sectional area (CSA) values of the sciatic nerves were correlated with the clinical and electrophysiologic data. RESULTS Mean CSA values were lower in the patient group when compared with the control group (P=0.042). Reduced compound motor action potentials regarding tibial and peroneal nerves were observed in the patient group (P=0.003 and P=0.005, respectively). US measurements did not correlate with the electrophysiological findings. However, sciatic nerve CSA values were positively correlated with body mass index in the control (r=0.534, P<0.05) and patient (r=0.482, P<0.05) groups. CONCLUSION Sciatic nerves seem to be smaller in subjects with SCI. Together with our electrophysiological data, this preliminary finding could possibly be attributed to primary axonal loss.
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Affiliation(s)
- T Tiftik
- Department of Physical Medicine and Rehabilitation, Ankara Physical Medicine and Rehabilitation Training and Research Hospital, Ankara, Turkey
| | - G T Öztürk
- Department of Physical Medicine and Rehabilitation, Ankara Physical Medicine and Rehabilitation Training and Research Hospital, Ankara, Turkey
| | - M Kara
- Department of Physical Medicine and Rehabilitation, Ankara Physical Medicine and Rehabilitation Training and Research Hospital, Ankara, Turkey
| | - C Türkkan
- Department of Physical Medicine and Rehabilitation, Ankara Physical Medicine and Rehabilitation Training and Research Hospital, Ankara, Turkey
| | - M Ersöz
- Department of Physical Medicine and Rehabilitation, Ankara Physical Medicine and Rehabilitation Training and Research Hospital, Ankara, Turkey
| | - L Özçakar
- Department of Physical and Rehabilitation Medicine, Hacettepe University Medical School, Ankara, Turkey
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Özçakar L, Tok F, Murat Ulaşli A, Kara M, Bayram Çarli A, Akarsu S. What actually changed after the use of musculoskeletal ultrasound? An international survey study in PRM. Eur J Phys Rehabil Med 2014; 50:469-471. [PMID: 24710355] [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: 06/03/2023]
Affiliation(s)
- L Özçakar
- Hacettepe University Medical School, Department of Physical and Rehabilitation Medicine, Ankara, Turkey -
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Kara M, Yolbas S, Yildirim A, Gundogdu B, Ozgen M, Sahin C, Koca S. AB0019 Change in MRNA Expression of Sirtuin-2 and Sirtuin-3 in Rheumatoid Arthritis. Ann Rheum Dis 2014. [DOI: 10.1136/annrheumdis-2014-eular.3564] [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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85
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Yolbas S, Kara M, Yildirim A, Gundogdu B, Kalayci M, Aydin S, Koca S. THU0489 Enho Gene Expression and Serum Adropin Level in Rheumatoid Arthritis and Systemic Lupus Erythematosus: Table 1. Ann Rheum Dis 2014. [DOI: 10.1136/annrheumdis-2014-eular.5252] [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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Kara M, Aydin T, Aran T, Turktekin N, Ozdemir B. Does dehydroepiandrosterone supplementation really affect IVF-ICSI outcome in women with poor ovarian reserve? Eur J Obstet Gynecol Reprod Biol 2013; 173:63-5. [PMID: 24331115 DOI: 10.1016/j.ejogrb.2013.11.008] [Citation(s) in RCA: 51] [Impact Index Per Article: 4.6] [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: 05/21/2013] [Revised: 08/15/2013] [Accepted: 11/07/2013] [Indexed: 11/28/2022]
Abstract
OBJECTIVES It is difficult to choose the correct fertility treatment in women with poor ovarian reserve. Although various methods have been used, the management of controlled ovarian hyperstimulation is not easy in poor responders. The aim of this study was to evaluate the efficacy of dehydroepiandrosterone (DHEA) on in vitro fertilization-intracytoplasmic sperm injection (IVF-ICSI) outcome of poor responders. STUDY DESIGN This was a randomized, prospective controlled trial. Women with serum antimullerian hormone<1 ng/ml or serum follicle-stimulating hormone>15 IU/l and antral follicle count <4 on day 2 of the menstrual cycle were considered to have poor ovarian reserve. All women were treated with a microdose induction protocol. Women in the study group received IVF-ICSI and DHEA 75 mg daily for 12 weeks. Women in the control group received IVF-ICSI without DHEA supplementation. RESULTS In total, 208 women with diminished ovarian reserve was enrolled in the study, 104 in the study group and 104 in the control group. The number of oocytes retrieved and the fertilization rate were slightly higher in the study group, but the pregnancy rate was higher in the control group. The differences were not significant. CONCLUSIONS The results failed to show that DHEA supplementation enhances IVF-ICSI outcome in women with poor ovarian reserve.
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Affiliation(s)
- M Kara
- Bozok University Medical Faculty, Department of Obstetrics and Gynaecology, Yozgat, Turkey.
| | - T Aydin
- Acibadem In Vitro Fertilization Centre, Kayseri, Turkey
| | - T Aran
- Karadeniz Technical University Medical Faculty, Department of Obstetrics and Gynaecology, Trabzon, Turkey
| | - N Turktekin
- Kayseri In Vitro Fertilization Centre, Kayseri, Turkey
| | - B Ozdemir
- Acibadem In Vitro Fertilization Centre, Kayseri, Turkey
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Ata P, Kara M, Özdemir E, Canbakan M, Gökçe AM, Bayraktar FA, Şahin G, Özel L, Titiz MI. Monitoring of CD3(+) T-cell count in patients receiving antithymocyte globulin induction after cadaveric renal transplantation. Transplant Proc 2013; 45:929-31. [PMID: 23622590 DOI: 10.1016/j.transproceed.2013.02.092] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
AIM Although antithymocyte globulin (ATG) has been used for years, its ideal dose and administration period is obscure. Herein, we sought to use the CD3(+) cell count to detect the optimal ATG dosage. MATERIAL AND METHODS Twenty-one patients who underwent cadaveric donor renal transplantation from January 2009 to January 2012 received a 1 mg/kg ATG initial dose at the time of the operation. Patients were randomized into 2 cohorts. Group 1 (n = 11) received ATG according to the clinical and total lymphocyte count and group 2 (n = 10), the dose was tailored according to the CD3(+) cell count. We compared the total and daily ATG dosages, ATG administration period, side effects of ATG, the number of days to a serum creatinine level <2 mg/dL, graft function at 3 months, acute rejection episodes, infection rates, costs of CD3(+) analysis, and ATG amounts. RESULTS Both groups showed similar gender, age, and human leukocyte antigen matching data. There was no difference in presensitizing events or panel-reactive antibody class 1 and 2 levels. The number of days to a serum creatinine level of <2 mg/dL was 11 ± 1.5 for group 1 versus 10.4 ± 0.8 for group 2 (P = .45). Between groups 1 and 2, there was a significant difference between the mean total (P = .031) and mean daily ATG dosages (P = .006). We used a total dose of 3800 mg ATG for group 1 and 2200 mg for group 2 and for the group 2 who underwent 43 CD3(+) cell counts. The expenditure per patient was 20% higher among group 1 than group 2. CONCLUSION Determination of appropriate ATG dosages by CD3(+) cell counts was useful, reliable, and cost effective.
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Affiliation(s)
- P Ata
- Department of Transplantation and 1st General Surgery, Haydarpasa Numune Hospital, Istanbul, Turkey.
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Kara M, Aydin T, Aran T, Turktekin N, Ozdemir B. Is dehydroepiandrosterone (DHEA) supplementation really effective on IVF-ICSI outcome in patients with poor ovarian reserve? Fertil Steril 2013. [DOI: 10.1016/j.fertnstert.2013.07.246] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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89
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Özçakar L, Kara M, Tekin L, Karanfil Y, Esen E, Utku B, Güven SC, Çağlayan G, Youssefi A, Pitruzzella M, Ciocchetti E, Açikel C. Effect of supervision on ultrasonographic measurements. A blinded randomized cross-over study. Eur J Phys Rehabil Med 2013; 49:527-531. [PMID: 23172405] [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: 06/01/2023]
Abstract
BACKGROUND Musculoskeletal ultrasound is becoming an increasingly popular clinical tool in the hands of physiatrists. Herewith, although the role of direct supervision (by an expert) is universally recognized as the core element for appropriate ultrasound training, to our best notice, its impact on ultrasonographic measurements has not been studied quantitatively in the hitherto literature. AIM To quantify the effect of supervision in the early period of musculoskeletal ultrasound training by using three different tissues (muscle-cartilage-tendon) as models. DESIGN A blinded randomized cross-over study. SETTING Physical Medicine and Rehabilitation Department of a University Hospital. POPULATION A total of 9 sonographers (8 novice and 1 expert) were involved whereby the novice sonographers were randomly divided into two groups; Group A (N.=4) and Group B (N.=4). METHODS All sonographers performed three thickness measurements; medial head of the gastrocnemius muscle, patellar tendon and femoral cartilage on the left lower limb of the same subject. The expert supervised Group A in the first half of the study (9 days), and Group B in the second half (9 days). Throughout the study period, all the participants were blinded to the data. Relative effectiveness, expert effect, order effect, treatment-period effect were studied for cross-over variance analysis. RESULTS For all the three sites, measurements under the supervision of the expert were significantly different than those without him -p values pertaining to relative effectiveness, expert effect were 0.014, 0.013 for femoral cartilage; <0.001, <0.001 for gastrocnemius and <0.001, <0.001 for patellar tendon, respectively). For gastrocnemius muscle measurements, studying with the expert in the second half of the study (vs in the first half) was better concerning the precision of the measurements (order effect P<0.001). CONCLUSION Supervision during measurements of novice sonographers is crucial and their data should otherwise be interpreted attentively.
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Affiliation(s)
- L Özçakar
- Departments of Physical and Rehabilitation Medicine ands Sports Medicine Hacettepe University Medical School Ankara, Turkey -
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Kara M, Alzafer S, Okur E, Halezeroglu S. The use of single incision thoracoscopic pleurectomy in the management of malignant pleural effusion. Acta Chir Belg 2013; 113:270-4. [PMID: 24224436 DOI: 10.1080/00015458.2013.11680926] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
BACKGROUND A number of procedures have been used in the management of malignant pleural effusion including repeated thoracentesis, tube thoracostomy, drainage with catheter, chemical pleurodesis, pleurectomy and pleuro-peritoneal shunt. However, the optimal method of management remains unclear. On the other hand, single incision thoracoscopic surgery has been defined as a less invasive method than the standard threeportal videothoracoscopy. We herein present our series of patients who underwent single incision thoracoscopic pleurectomy for malignant pleural effusion. PATIENTS AND METHODS We performed a single incision thoracoscopic pleurectomy in a total of 19 consecutive patients, 11 (57.8%) male and 8 (42.2%) female with a mean age of 56.3 +/- 16.9 years who had malignant pleural effusions. We made a single 2-2.5 cm incision at the seventh or eighth intercostal spaces on the midaxillary line for the procedure. RESULTS We performed a total of 23 single incision thoracoscopic total pleurectomies consisting of 11 (57.8%) right-sided, 4 (21.1%) left-sided and 4 (21.1%) bilateral procedures. The mean total postoperative drainage was 553 +/- 266 cc (Median; 470 cc), and the mean chest tube removal time was 2.3 +/- 0.4 days (Median; 2 days). We observed neither morbidity nor mortality. No patient required an additional port or a conversion to thoracotomy. Median follow-up was 83 days (range, 30 to 359 days). Pleural effusion recurred in two (8.6%) out of 23 procedures which resulted in a success rate as 91.4% for the procedure. CONCLUSION Single incision thoracoscopic pleurectomy is a safe, less invasive and an effective method of pleurodesis with a low recurrence rate in patients with malignant pleural effusion.
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Affiliation(s)
- M. Kara
- Department of Thoracic Surgery,Acibadem University School of Medicine
| | - S. Alzafer
- Department of Chest Diseases, Bakirkoy Acibadem Hospital
| | - E. Okur
- Department of Thoracic Surgery,Acibadem University School of Medicine
| | - S. Halezeroglu
- Department of Thoracic Surgery,Acibadem University School of Medicine
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Koca SS, Pehlivan Y, Kara M, Oner FA, Yilmaz N, Cetin GY, Kisacik B, Ozgen M, Pamuk ON, Direskeneli H, Sayarlioglu M, Onat AM. AB0152 The rs11792633-t allele of il-33 gene is associated with systemic sclerosis. Ann Rheum Dis 2013. [DOI: 10.1136/annrheumdis-2013-eular.2475] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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92
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Koca S, Ozgen M, Dayanan R, Kara M, Ilhan N, Isik A. THU0407 Serum ghrelin and obestatin levels in behçet’s disease:. Ann Rheum Dis 2013. [DOI: 10.1136/annrheumdis-2012-eular.2372] [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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93
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Kara M, Genc H, Tapan S, Meral C, Ercin CN, Erdal M, Dogru T. Alpha fetoprotein levels and its relationship with histopathological findings in patients with non-alcoholic fatty liver disease. Eur Rev Med Pharmacol Sci 2013; 17:1536-1541. [PMID: 23771543] [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
BACKGROUND Non alcoholic fatty liver disease (NAFLD) encompasses a wide spectrum of liver disorders ranging from simple steatosis (SS) to cirrhosis. In addition, increasing evidence indicates that hepatocellular carcinoma (HCC) may represent a late complication of NAFLD. Alpha-fetoprotein (AFP) serum levels can rise in adults with HCC. AIM In the present study, we aimed to investigate circulating AFP concentrations in subjects with histologically proven NAFLD. In addition, the relationship of AFP with liver histology was also searched. PATIENTS AND METHODS One hundred and three male NAFLD patients and 57 healthy male controls were enrolled in the study. In addition, patients with NAFLD grouped as nonalcoholic steatohepatitis (NASH) (n = 72) and SS (n = 31). AFP serum levels were measured in duplicate by the chemiluminescence's method. RESULTS Age and gender were similar in subjects with NAFLD and controls. AFP serum levels were not different between two groups. In subgroup analysis, AFP levels were also found to be similar in patients with NASH and SS. Moreover, no significant relationship was found between AFP and histopathological findings in patients with NAFLD. CONCLUSIONS The results of this preliminary study suggest that AFP is not involved in the pathogenesis of NAFLD.
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Affiliation(s)
- M Kara
- Department of Gastroenterology, Etimesgut Military Hospital, Ankara, Turkey
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94
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Erkasap N, Ozkurt M, Erkasap S, Yasar F, Uzuner K, Ihtiyar E, Uslu S, Kara M, Bolluk O. Leptin receptor (Ob-R) mRNA expression and serum leptin concentration in patients with colorectal and metastatic colorectal cancer. Braz J Med Biol Res 2013; 46:306-10. [PMID: 23558862 PMCID: PMC3854369 DOI: 10.1590/1414-431x20122559] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2012] [Accepted: 12/04/2012] [Indexed: 02/07/2023] Open
Abstract
The objective of the present study was to investigate the effect of leptin on the
progression of colorectal carcinoma to metastatic disease by analyzing the serum
leptin concentration and Ob-R gene expression in colon cancer tissues. Tissue
samples were obtained from 31 patients who underwent surgical resection for
colon (18 cases) and metastatic colon (13 cases) cancer. Serum leptin
concentration was determined by an enzyme-linked immunosorbent assay (ELISA) and
Ob-R mRNA expression by real-time polymerase chain reaction (RT-PCR) for both
groups. ELISA data were analyzed by the Student t-test and
RT-PCR data were analyzed by the Mann-Whitney U-test. RT-PCR results
demonstrated that mRNA expression of Ob-R in human metastatic colorectal cancer
was higher than in local colorectal cancer tissues. On the other hand, mean
serum leptin concentration was significantly higher in local colorectal cancer
patients compared to patients with metastatic colorectal cancer. The results of
the present study suggest a role for leptin in the progression of colon cancer
to metastatic disease without weight loss. In other words, significantly
increased Ob-R mRNA expression and decreased serum leptin concentration in
patients with metastatic colon cancer indicate that sensitization to leptin
activity may be a major indicator of metastasis to the colon tissue and the
determination of leptin concentration and leptin gene expression may be used to
aid the diagnosis.
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Affiliation(s)
- N Erkasap
- Department of Physiology, Osmangazi University Medical Faculty, Meselik, Eskisehir, Turkey.
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95
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Kara M, Demir F, Ata P, Ozel L, Gumrukcu G, Unal E, Canbakan M, Gucun M, Esadoglu V, Ozdemir E, Cemel H, Titiz MI. The impact of C4d staining as a humoral injury marker. Transplant Proc 2013; 44:1694-6. [PMID: 22841245 DOI: 10.1016/j.transproceed.2012.05.029] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
PURPOSE Acute and chronic humoral injuries in renal transplant recipients are the main reasons for graft rejection and failure. Histological and clinical characteristics of humoral rejection and symptoms are variable and not always helpful for differential diagnosis. Clinical monitoring of the allograft, an elevated serum panel-reactive antibody (PRA), and the presence of donor-specific antibody (DSA) during immune monitoring as well as C4d staining of biopsy material can establish the differential diagnosis. Even without a cellular component, humoral rejection reaction is serious because the target tissue is the graft endothelium. Because the kidney graft has a rich vascular structure this attack causes permanent injury to the kidney in the long term. Graft dysfunction in this setting is usually more severe, requiring dialysis therapy, compared with acute cellular reactions. Positive C4d staining of peritubular capillaries in biopsy material represent a hallmark of complement-dependent cytotoxicity, supporting the diagnosis of humoral rejection. We analyzed C4d staining as a hallmark of humoral rejection. METHODS From 2009 to 2011, we analyzed the relationship between pathological findings of C4d immunohistochemistry staining and the clinical outcomes of 45 kidney transplant recipients who underwent a kidney biopsy because of graft dysfunction due to possible humoral rejection. RESULTS Biopsy specimens of 15 patients stained C4d positive; the remaining 30 showed negative results. Intravenous steroids, PP + IVIG with or without antithymocyte globulin (ATG), was administered for treatment. Sixty six percent (n = 10) of patients were C4d positive with 16% (n = 5) of those showing C4d-negative biopsy results, losing their grafts, and returning to hemodialysis. CONCLUSIONS C4d staining refractory humoral rejection injury was related to poor graft outcomes.
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Affiliation(s)
- M Kara
- First General Surgery, Transplantation and Genetics Units, Haydarpasa Numune Research and Training Hospital, Istanbul, Turkey.
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Özçakar L, Kara M, Yalçın B, Yalçın E, Tiftik T, Develi S, Yazar F. Bypassing the challenges of lower-limb electromyography by using ultrasonography: AnatoMUS-II. J Rehabil Med 2013; 45:604-5. [DOI: 10.2340/16501977-1162] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [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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97
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Kara M, Alzafer S, Okur E, Halezeroglu S. The use of single incision thoracoscopic surgery in diagnostic and therapeutic thoracic surgical procedures. Acta Chir Belg 2013; 113:25-9. [PMID: 23550465 DOI: 10.1080/00015458.2013.11680880] [Citation(s) in RCA: 3] [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: 10/21/2022]
Abstract
BACKGROUND As a minimal invasive procedure, a standard threeportal videothoracoscopy may have complications such as chronic and residual pain. However, a single incision thoracoscopic surgery is a less invasive procedure with minimal complications. We present our series of patients who had single incision thoracoscopic surgical procedures. PATIENTS AND METHODS A total of 49 patients, 29 (59.2%) male and 20 (40.8%) female with a mean age of 45.7 +/- 17.6 years (range, 16 to 86 years) underwent a total of 59 single incision thoracoscopic surgical procedures. We most often made a 2-2.5 cm single incision on the seventh or eighth intercostal space at the midaxillary line. VAS (Visual analogue scale) scores for pain at postoperative day 1 and the mean of chest tube removal times were recorded for each procedure. The patients were discharged following chest tube removal. RESULTS We performed an overall of 59 procedures including 8 (13.7%) wedge resections for either histologic diagnosis or spontaneous pneumothorax, 4 (6.8%) pleural biopsies, 23 (38.9%) pleurectomies, 9 (15.2%) deloculation and decortications, 5 (8.6%) traumas in and 10 (17.5%) sympathectomies. No patient required an additional thoracoscopic port or conversion to thoracotomy. The overall mean of postoperative VAS scores for all procedures at postoperative day 1 and day 30 were 3.2 +/- 0.9 and 1.4 +/- 0.5, respectively (p <0.0001). The overall mean of chest tube removal time was 2.3 +/- 0.8 days (median; 2). We observed neither morbidity nor mortality. CONCLUSIONS In selected patients, single incision thoracoscopic surgery is an effective and a safe procedure with lower levels of pain and shorter hospital stay. A wide spectrum of thoracic surgical procedures can be performed with the use of single incision thoracoscopic surgery.
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Affiliation(s)
- M. Kara
- Department of General Thoracic Surgery,Acibadem University School of Medicine, Istanbul, Turkey
| | - S. Alzafer
- Department of Chest Diseases, Bakirkoy Acibadem Hospital, Istanbul, Turkey
| | - E. Okur
- Department of General Thoracic Surgery,Acibadem University School of Medicine, Istanbul, Turkey
| | - S. Halezeroglu
- Department of General Thoracic Surgery,Acibadem University School of Medicine, Istanbul, Turkey
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Özçakar L, Franchignoni F, Kara M, Muñoz Lasa S. Choosing a scholarly journal during manuscript submission: the way how it rings true for physiatrists. Eur J Phys Rehabil Med 2012; 48:643-647. [PMID: 22641249] [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: 06/01/2023]
Abstract
BACKGROUND Research and publications are increasing in Physical and Rehabilitation Medicine (PRM). Hence, there appears to be a multifaceted and challenging turnover in our scientific niche involving authors, editors, publishers and readers in a complex interplay. AIM To explore the manuscript submission process from the side of the authors, and to better understand their perceptions and preferences. DESIGN A survey study. SETTING E-mail and personal contact. POPULATION European researchers working in the field of PRM. METHODS A questionnaire was specifically prepared for this study. The first part included questions regarding personal and scientific background; in the second part the attendants rated 20 items (with respect to several journal characteristics) on a 4-point semantic differential scale; and the third part contained two open ended questions regarding additional factors that the authors considered during submission. RESULTS Area of interest (mission and contents) of the journal within the "Rehabilitation" category, absolute impact factor of the journal, match between perceived "quality" of their study and journal impact factor were considered to be the three most important factors by the authors. CONCLUSION In a scientific environment where the numbers of research and publication outlets alike are growing, it is important to understand how authors choose where to publish their papers. CLINICAL REHABILITATION IMPACT We believe that editors, and publishers as well, would take into account our findings to best meet the needs of all actors in the competitive marketplace of scholarly publishing in PRM.
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Affiliation(s)
- L Özçakar
- Department of Physical and Rehabilitation Medicine, Hacettepe University Medical School, Ankara, Turkey.
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Teh AA, Ahmad R, Kara M, Rusop M, Awang Z. The effect of ammonia on carbon nanotube growth using simple thermal chemical vapour deposition. J Nanosci Nanotechnol 2012; 12:8201-8204. [PMID: 23421197 DOI: 10.1166/jnn.2012.4517] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
We report the use of a new precursor as active agents to promote the growth of carbon nanotubes (CNT) in methane ambient using a simple thermal chemical vapour deposition method. The agents consist of ammonia and methanol mixed at different ratios and was found to enhance the growth of CNTs. The optimum methanol to ammonia ratio was found to be 8 to 5, whereby longer and denser CNTs were produced compared to other ratios. The result was found otherwise when the experiment was done solely in methane ambient. In addition, CNT growth on substrates coated with double layer Ni catalyst was improved in terms of quality and density compared to a single coated substrates. This finding is supported by Raman spectrometry analysis.
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Affiliation(s)
- A Awang Teh
- Microwave Technology Centre, Institute of Science, Universiti Teknologi MARA, Malaysia
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100
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Ahmad R, Salina M, Mamat MH, Teh AA, Kara M, Rusop M, Awang Z. Aging effects on physical and electrical properties of nano-structured MgZnO thin films for carbon nanotube applications. J Nanosci Nanotechnol 2012; 12:8153-8157. [PMID: 23421193 DOI: 10.1166/jnn.2012.4524] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
This paper addresses the growth of nano-structured MgZnO thin films by sol-gel spin coating method which will be used as a template layer to grow carbon nanotubes. The nano-structured MgZnO films were deposited on platinized (100) silicon substrates. In this work, we focused on the effect of aging and Mg content on the film structure and resistivity. Sols with Mg content of 10, 30 and 50 at.% were subjected to aging times of between 3 to 240 hours. Results from scanning (SEM) and field emission scanning electron (FESEM) microscopes and surface profiler (SP) showed that the sol aging increased the thickness, grain size and surface roughness for aging up to 240 hours. The energy dispersive analysis by X-ray (EDAX) confirmed the element of Mg in the ZnO films. The electrical resistivity also increased with aging time as confirmed by four point probe method. The results suggest that appropriate aging of the sol is important for improving physical quality and electrical performance of MgZnO thin films derived from sol-gel technique.
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Affiliation(s)
- R Ahmad
- Faculty of Electrical Engineering, Universiti Teknologi MARA, Shah Alam, 40450 Malaysia
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