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Investigation of the parameters affecting the behavior of RC beams strengthened with FRP

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Frontiers of Structural and Civil Engineering 2022年第6期16卷 729-743页

作者： Kadir SENGuN guray ARSLAN Department of Civil Engineering Yildiz Technical UniversityIstanbul 34220Turkey

Three-point bending tests were carried out on nineteen Reinforced Concrete(RC)beams strengthened with FRP in the form of completely *** strip width to spacing ratios,FRP type,shear span to effective depth ratios,the number of FRP layers in shear,and the effect of stirrups spacing were the parameters investigated in the experimental *** FRP contribution to strength on beams having the same strip width to spacing ratios could be affected by the shear span to effective depth ratios and stirrups *** FRP contributions to strength were less on beams with stirrups in comparison to the tested beams without *** RC beams using FRP could change the failure modes of the beams compared to the reference *** addition to the experimental study,a number of equations used to predict the FRP contribution to the shear strength of the strengthened RC beams were assessed by using a limited number of beams available in the *** effective FRP strain is predicted by using test results,and this prediction is used to calculate the FRP contribution to shear strength in ACI 440.2R(2017)*** on the statistical values of the data,the proposed equation has the lowest coefficient of variation(COV)value than the other equations.

关键词： carbon glass strengthening shear strength reinforced concrete beam fiber reinforced polymer

Pancreatic hyperechogenicity on endoscopic ultrasound examination

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World Journal of Gastroenterology 2011年第15期17卷 2061-2062页

作者： Yucel ustundag guray Ceylan Koray Hekimoglu Zonguldak Karaelmas university School of Medicine Department of Internal Medicine Gastroenterology Clinics Zonguldak 67100 Turkey Baskent university School of Medicine Department of Radiology Ankara 06100 Turkey

There is an ongoing discussion on how to diagnose a hyperechogenic pancreas and what is the clinical significance of diffusely hyperechogenic pancreas. Computerized tomography and magnetic resonance imaging are the more appropriate methods to diagnose pancreatic hyperechogenicity when compared with transcutaneous or endoscopic ultrasound examination. More importantly, pancreatic hyperechogenicity may not be a certain indicator of pancreatic fat infiltration. Even if it is true, we do not know the clinical significances of pancreatic fat accumulation. Some suggested that excess fat in the pancreas is associated with chronic pancreatitis. However, several histological studies on human alcoholic chronic pancreatitis did not prove the presence of fatty pancreas in such cases. Thus, except for aging, it is very rare to have truly steatotic pancreas in the absence of certain human diseases.

关键词： Hyperechogenic pancreas Fatty pancreas Endoscopic ultrasound Aging Chronic pancreatitis

Giant myxoinflammatory fibroblastic sarcoma with bone invasion:a very rare clinical entity and literature review

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Chinese Journal of Cancer 2014年第8期33卷 406-410页

作者： guray Togral Murat Arikan Elif Aktas Safak Gungor Department of Orthopaedics and Traumatology Oncology Training and Research HospitalVatan caddesi 06200DemetevlerAnkaraTurkey Department of Radiology Oncology Training and Research HospitalVatan caddesi 06200DemetevlerAnkaraTurkey

Myxoinflammatory fibroblastic sarcoma(MIFS) is a rare low-grade, malignant soft tissue tumor that is usually observed in the extremities of adult patients. Magnetic resonance imaging findings for this tumor type have rarely been reported. We report a case involving the distal left femur of a middle-aged man and tumoral invasion of the bone, which, to our knowledge, has been previously described only once. He was treated with distal femoral tumor resection and reconstruction with a modular prosthesis. Histopathologic diagnosis confirmed MIFS. We reviewed literature of the diagnostic imaging and bone invasion findings associated with this tumor type.

关键词：纤维母细胞文献综述浸润肉瘤肿瘤侵袭实体临床巨人

A practical approach to imaging characteristics and standardized reporting of COVID-19:A radiologic review

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Military Medical Research 2021年第3期8卷 424-432页

作者： Deniz Esin Tekcan Sanli Duzgun Yildirim Ahmet Necati Sanli Suha Turkmen Neval Erozan guray Husmen Aytug Altundag FilizTuzuner Department of Radiology Acibadem Kozyatagi Hospital19 Mayis Mahinonu CadOkur SokNo.24/Af Kozyatagi34734 IstanbulTurkey Department of Radiology Acibadem Taksim Hospital34373 IstanbulTurkey Cerrahpasa Medical Faculty Department of General SurgeryIstanbul University-Cerrahpasa34098 IstanbulTurkey Department of Emergency Acibadem Taksim Hospital34373 IstanbulTurkey Department of Otolaryngology Acibadem Taksim Hospital34373 IstanbulTurkey Department of Anesthesiology Acibadem Taksim Hospital34373 IstanbulTurkey

Novel coronavirus(2019-nCoV),also known as severe acute respiratory syndrome coronavirus 2(SARS-CoV-2),is a pathogen that has caused a rapidly spreading pandemic all over the *** primary mean of transmission is inhalation with a predilection for respiratory system involvement,especially in the distal *** disease that arises from this novel coronavirus is named coronavirus disease 2019(COVID-19).COVID-19 may have a rapid and devastating course in some cases leading to severe complications and *** imaging methods have an invaluable role in diagnosis,follow-up,and *** this review,radiological imaging findings of COVID-19 have been systematically reviewed based on the published literature so *** reporting templates are also emphasized from a different point of view,considering specific distinctive patterns of involvement.

关键词： Coronavirus disease 2019 Severe acute respiratory syndrome coronavirus 2 Computed tomography Pneumonia Acute respiratory distress syndrome Ground-glass opacities Crazy-paving pattern

FK506 Treatment Alters the Vascular Reactivity of Renal and Mesenteric Vascular Beds

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FK506 Treatment Alters the Vascular Reactivity of Renal and ...

Allogeneic stem cell transplantation in chronic myeloid leukemia patients: Single center experience

第十五届国际药理学大会

作者： Sovdan guray Tekes Ender Tuncer Meral

＜正＞ The contribution of endothelin - 1 （ET - 1） to FK506 - induced hypertension, vascular dysfunction and kidney malondialdehyde （MDA） levels were investigated in rats treated with FK506 for 8 or 30 days. Kidney/mesentery of rats was perfused and perfusion pressure was recorded. The response to noradrenaline （NA） only in renal vascular beds was increased by FK506 after 8 days and this increase was prevented by Bosentan. Sodium nitroprusside （SNP） - induced decreases in perfusion pressure were attenuated by FK506. in kidney and mesentery, which was not prevented by Bosentan. After 30 days, there was an increase in blood pressure, which was prevented by bosentan. but no change in the response to NA in either kidneys or mesentery. FK506 decreased the response to SNP in kidneys, but not in mesentery. FK506 increased MDA levels in the kidneys after 30 days. Bosentan did not change this increase. Results indicated that ET - 1 plays a role in the EK506 - induced change in vascular reactivity to NA in kidneys and druginduced hypertension in the rats, but not in the impaired vasodilation caused by EK506. There was no relationship between oxidative stress and EK506 - induced hypertension.

关键词： FK506. ET-1. kidney mesentery

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World Journal of Hematology 2017年第1期6卷 1-10页

作者： Nur Soyer Ayse uysal Murat Tombuloglu Fahri Sahin guray Saydam Filiz Vural Department of Hematology Ege University Medical Faculty

Chronic myeloid leukemia(CML) is a myeloproliferative disease which leads the unregulated growth of myeloid cells in the bone marrow. It is characterized by the presence of Philadelphia chromosome. Reciprocal translocation of the ABL gene from chromosome 9 to 22 t(9; 22)(q34; q11.2) generate a fusion gene(BCRABL). BCR-ABL protein had constitutive tyrosine kinase activity that is a primary cause of chronic phase of CML. Tyrosine kinase inhibitors(TKIs) are now considered standard therapy for patients with CML. Even though, successful treatment with the TKIs, allogeneic stem cell transplantation(ASCT) is still an important option for the treatment of CML, especially for patients who are resistant or intolerant to at least one second generation TKI or for patients with blastic phase. Today, we know that there is no evidence for increased transplantrelated toxicity and negative impact of survival with pretransplant TKIs. However, there are some controversies about timing of ASCT, the optimal conditioning regimens and donor source. Another important issue is that BCRABL signaling is not necessary for survival of CML stem cell and TKIs were not effective on these cells. So, ASCT may play a role to eliminate CML stem cells. In this article, we review the diagnosis, management and treatment of CML. Later, we present our center's outcomes of ASCT for patients with CML and then, we discuss the place of ASCT in CML treatment in the TKIs era.

关键词： Chronic myeloid leukemia Allogeneic stem cell transplantation Tyrosine kinase inhibitors Graft vs host disease Survival