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Comparison of postoperative anterior segment changes associated with pars plana vitrectomy with and without vitreous base shaving

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International Journal of Ophthalmology(English edition) 2020年第11期13卷 1745-1752页

作者： Enes Toklu Muhammed Altinisik ahmet Elbay ArifKoytak Departmentof Ophthalmology Kemalpasa State Hospitalizmir 35730Turkey Department of Ophthalmology Faculty of MedicineManisa Celal Bayar UniversityManisa 45040Turkey Department of Ophthalmology Faculty of MedicineBezmialem Vakif UniversityIstanbul 34093Turkey

AIM:To compare changes in anterior segment topography and axial length(AL)evaluated with Pentacam and IOL Master after pars plana vitrectomy(PPV)performed with and without vitreous base ***:This prospective study included patients who underwent PPV or phacoemulsification+PPV(Phaco+PPV)for various *** who underwent total posterior hyaloid detachment and excessive vitreous base shaving with scleral indentation were referred to as complete PPV(c-PPV).The patients whom posterior hyaloid was separated as far as the posterior arcades and vitreous base shaving with scleral depression was not performed were classified as the partial PPV(p-PPV)*** patients underwent detailed ophthalmologic examinations preoperatively and lwk,I,and 3mo *** in the anterior chamber depth(ACD),anterior chamber volume(ACV),iridocorneal angle(ICA)f central corneal thickness(Cd),and keratometric measurements(K1 and K2)were evaluated with Pentacam *** in the AL measurements were analyzed with IOL ***:A significant increase in ACD was observed in c-PPV cases(P=0.02),but this increase was not significant in the p-PPV group(P=0.053).In contrast,ICA increased significantly in the c-PPV group(P=0.02)but decreased in the p-PPV group(P=0.09).BCVA was significantly improved in the c-PPV group from week 1(P0.05 for all).CONCLUSION:Incomplete posterior hyaloid excision and not removing the vitreous base in PPV surgeries may create a more stable anterior chamber,thus preventing the downward movement of the lens-iris diaphragm,and may cause ciliary body retraction,thereby reducing *** of these effects can

关键词： anterior chamber depth axial length central corneal thickness iridocorneal angle pars plana vitrectomy vitreous base.

Gastric pneumatosis intestinalis associated with malignancy:An unusual case report

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World Journal of Gastroenterology 2009年第6期15卷 758-760页

作者： ahmet Bilici Berrin Karadag Alper Doventas Mesut Seker Department of Medical Oncology Dr.Lutfi Kirdar Kartal Education and Research HospitalKartal 34210 IstanbulTurkey Department of Internal Medicine Sisli Etfal Education and Research Hospital34210 IstanbulTurkey Department of Internal Medicine Istanbul Education and Research Hospital34210 IstanbulTurkey

Pneumatosis intestinalis(PI)is an uncommon disease defined as gas-filled cysts that are found in the wall of the gastrointestinal(GI)*** exact causes of PI are still unclear,but it may associated with coexisting diseases,such as some GI disorders,connective tissue disease,some medication and drugs,and rarely *** most common localization is the small *** PI secondary to malignancy has been rarely *** report on a 94-year- old man with gastric PI associated with inoperable adenocarcinoma localized in the *** the gastrojejunostomy and choledochojejunostomy bypass,his general condition improved and PI disappeared,but he died due to poor performance status and malignancy 6 mo *** suggest that in patients presenting with PI,malignancy should be considered in the differential diagnosis.

关键词： Pneumatosis intestinalis Malignancy Adenocarcinoma

Solution to the MHD flow over a non-linear stretching sheet by homotopy perturbation method

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Science China(Physics,Mechanics & Astronomy) 2011年第2期54卷 342-345页

作者： RAFTARI Behrouz MOHYUD-DIN Syed Tauseef YILDIRIM ahmet Department of Mathematics Islamic Azad UniversityKermanshah branch Taxila Cantt HITEC University Department of Mathematics Ege University

In this study,by means of homotopy perturbation method(HPM) an approximate solution of the magnetohydrodynamic(MHD) boundary layer flow is *** main feature of the HPM is that it deforms a difficult problem into a set of problems which are easier to *** produces analytical expressions for the solution to nonlinear differential *** obtained analytic solution is in the form of an infinite power *** this work,the analytical solution obtained by using only two terms from HPM *** with the exact solution and the solution obtained by the Pade approximants and shooting method show the high accuracy,simplicity and efficiency of this method.

关键词： boundary layer flow magnetohydrodynamics flow(MHD) nonlinear differential equations homotopy perturbation method

Synthesis and Electrochemical Properties of Carbon-Mixed LiEr_(0.02)Fe_(0.98)PO_4 Cathode Material for Lithium-ion Batteries

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Journal of Materials Science & Technology 2011年第9期27卷 861-864页

作者： Hüseyin Gktepe Halil Sahan ahmet lgen Saban Patat Department of Chemistry M krkǒglu Vocational High School University of Erciyes Department of Chemistry Science of Faculty University of Erciyes

LiEr0.02Fe0.98PO4/C composite cathode was synthesized by a simple solution method with polyethylene glycol （PEG） as the reductive agent and carbon source. The effect of erbium doping on the electrochemical behavior of LiFePO4 was studied in this paper. The samples were characterized by X-ray powder diffraction and scanning electron microscopy and the electrochemical properties were investigated by the charge-discharge test. An initial discharge capacity of 149 mAh.g-1 was achieved for the LiEr0.02Fe0.98PO4/C composite cathode with a rate of 0.1 C. The electronic conductivity of Er doped LiFePO4/C was measured as 10-2 ***-1. The results indicated that erbium doping did not destroy the lattice structure of LiFePO4 and enlarge the lattice volume. These changes are beneficial to the improvement of the electrochemical performance of the LiFePO4 cathode.

关键词： LiFePO4 Cathode Erbium doping Lithium batteries

Investigation of solar-induced photoelectrochemical water splitting and photocatalytic dye removal activities of camphor sulfonic acid doped polyaniline-WO3-MWCNT ternary nanocomposite

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Journal of Materials Science & Technology 2020年第3期38卷 7-18页

作者： Mir Ghasem Hosseini Pariya Yardani Sefidi ahmet Musap Mert Solen Kinayyigit Department of Physical Chemistry Electrochemistry Research LaboratoryUniversity of TabrizTabrizIran Engineering Faculty Department of Materials Science and NanotechnologyNear East University99138NicosiaNorth CyprusMersin 10Turkey Laboratory of Nanocatalysis and Clean Energy Technologies Institute of NanotechnologyGebze Technical University41400KocaeliTurkey

The camphor sulfonic acid doped polyaniline-WO3-multiwall carbon nanotube(CSA PANI-WO3-CNT)ternary nanocomposite was synthesized during in-situ oxidative polymerization and characterized by Fourier transform infrared(FTIR)spectroscopy,Raman spectroscopy,X-ray diffraction(XRD),Field emission scanning electron microscopy(FESEM),X-ray photoelectron spectroscopy(XPS),Transmission electron microscopy(TEM),and Energy-dispersive X-ray spectroscopy(EDS).The application of CSA PANIWO3-CNT ternary nanocomposite was investigated as the photocatalyst in the degradation of methylene blue dye(MB)and as the noble metal-free photoanode in photoelectrochemical water splitting under solar light *** degradation percentage of MB dye after 60 min illumination by CSA PANI-WO3-CNT ternary nanocomposite reached 91.40%which was higher than that of pure WO3(43.45%),pure CSA PANI(48.4%)and CSA PANI-WO3 binary nanocomposite(85.15%).The photocurrent density of indium tin oxide(ITO)/CSA PANI-WO3-CNT photoanode obtained 0.81 m A/cm2 at 1.23 V *** hydrogen electrode under illumination which was 1.27,2.13,and 4.26 times higher than that of the ITO/CSA PANI-WO3(0.64 m A/cm2),ITO/pure CSA PANI(0.38 m A/cm2),and ITO/pure WO3(0.19 m A/cm2).Also,the applied bias photon-to-current efficiency(ABPE)of ITO/CSA PANI-WO3-CNT was obtained 0.11%which showed two-fold,four-fold,and five-fold enhancements compared to the ITO/CSA PANI-WO3,ITO/CSA PANI,and ITO/WO3,*** electrochemical impedance spectroscopy,as well as the Mott-Schottky results,confirmed the better photoelectrocatalytic activity of ITO/CSA PANI-WO3-CNT in comparison with ITO/WO3,ITO/CSA PANI,and ITO/CSA *** observed improvement in the photocatalytic and photoelectrocatalytic performances of WO3 in the presence of CSA PANI is due to the formation of type-II heterojunction between WO3 and CSA PANI which allows the separation of charge carriers easier and *** the other hand,MWCNT addition to the CSA PANI-

关键词： Camphor sulfonic acid Polyaniline WO3 Photocatalyst Water splitting

Secondary endoresection for previously treated choroidal melanomas with a non-responsive course and persistent exudative retinal detachment

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International Journal of Ophthalmology(English edition) 2022年第2期15卷 276-283页

作者： ahmet Kaan Gündüz Ibadulla Mirzayev Department of Ophthalmology Ankara University Faculty of MedicineAnkara 06590Turkey Private Eye Clinic Ankara 06590Turkey Department of Ophthalmology Dünyagoz HospitalAnkara 06540Turkey

AIM:To evaluate the results and complications of secondary endoresection via pars plana vitrectomy for choroidal melanoma and review the previously reported endoresection studies on the treatment of choroidal ***:The medical records of 6 patients with choroidal melanoma who underwent secondary endoresection between March 2012 and March 2020 were retrospectively *** indications for secondary endoresection were progressive or recurrent tumor and severe exudative retinal detachment after previous treatment with plaque radiotherapy/Cyberknife radiosurgery/transpupillary thermotherapy(TTT).RESULTS:Before endoresection,2 eyes had Iodine-125 plaque radiotherapy and TTT,1 eye had Ruthenium-106 plaque radiotherapy and TTT,1 eye had Cyberknife radiosurgery and TTT,1 eye had Cyberknife radiosurgery,and 1 eye had TTT *** visual acuity ranged from 20/63 to 20/1600(Snellen) and from 0.5 to 1.9(mean:1.1) on the log MAR *** mean tumor base diameters were 9.5×8.7 mm and the mean tumor thickness was 5.4 *** secondary endoresection,transient vitreous hemorrhage developed in 2(33.3%) eyes and retinal detachment in 1(16.7%) *** examination revealed epithelioid cell melanoma in 4(66.7%) eyes and mixed cell melanoma in 1(16.7%).Melanoma cell type was not specified in 1(16.7%) *** a mean follow-up of 49.6 mo(range:16-90 mo),mean visual acuity did not improve and 1 eye was enucleated due to tumor *** visual acuity ranged from 20/63 to 20/1600(Snellen) and from 0.5 to 1.9(mean:1.2) on the log MAR *** patients with choroidal melanoma developed metastasis and eventually ***:Secondary endoresection seems to be an effective treatment option for globe salvage in choroidal melanoma not responsive to conventional treatment and displaying persistent exudative retinal *** was no visual acuity increase among the treated eyes but globe salvage was possible in most cases in this study.

关键词： endoresection choroidal melanoma metastasis pars plana vitrectomy recurrence

Density-Dependent Conformable Space-time Fractional Diffusion-Reaction Equation and Its Exact Solutions

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Communications in Theoretical Physics 2018年第1期69卷 1-4页

作者： Kamyar Hosseini Peyman Mayeli ahmet Bekir Ozkan Guner Department of Mathematics Rasht Branch Islamic Azad University Young Researchers and Elite Club Lahijan Branch Islamic Azad University Department of Mathematics and Computer Art-Science Faculty Eskisehir Osmangazi University Department of International Trade Faculty of Economics and Administrative Sciences Cankiri Karatekin University

In this article, a special type of fractional differential equations(FDEs) named the density-dependent conformable fractional diffusion-reaction(DDCFDR) equation is studied. Aforementioned equation has a significant role in the modelling of some phenomena arising in the applied science. The well-organized methods, including the exp(-φ(ε))-expansion and modified Kudryashov methods are exerted to generate the exact solutions of this equation such that some of the solutions are new and have been reported for the first time. Results illustrate that both methods have a great performance in handling the DDCFDR equation.

关键词： density-dependent conformable fractional diffusion-reaction equation exp(-Ф(ε) )-expansion method modified Kudryashov method exact solutions

New solitary wave and other exact solutions of the van der Waals normal form for granular materials

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Journal of Ocean Engineering and Science 2022年第2期7卷 170-177页

作者： Asim Zafar Tahir Mushtaq Aslam Malik ahmet Bekir Department of Mathematics COMSATS University IslamabadVehari CampusPakistan Department of Mathematics University of the PunjabLahorePakistan Neighbourhood of Akcaglan Imarli StreetNumber:28/426030EskisehirTurkey

The investigation of exact solitary wave solutions to the nonlinear partial differential equation plays an important role to understand any physical phenomena in diverse applied *** current work is re-lated to the most prominent nonlinear model named as the van der Waals normal form that appeared naturally and also industrially for the granular *** oceanography,the sea ice,sand and snow are some examples of aforesaid matter among *** employ two novel integration approaches named as the simplest equation method and the exp a function method to explore the above mentioned van der Waals *** a backlash,many new solitary waves and other exact solutions are *** ob-tained results depict that the used approaches are simple and effective to deal with nonlinear ***,the numerical simulation of some solutions via two and three dimension graphical configurations are presented for certainty and exactness.

关键词： Van der Waals equation Novel integration schemes Solitary wave solutions

Management of Hepatitis C Post-liver Transplantation: a Comprehensive Review

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Journal of Clinical and Translational Hepatology 2015年第2期3卷 140-148页

作者： Oscar Mitchell ahmet Gurakar Department of Transplant Hepatology Division of Gastroenterology and Hepatology Johns Hopkins University School of MedicineBaltimore MD USA

Infection with hepatitis C virus (HCV) is a common cause of chronic liver disease,and HCV-related cirrhosis and hepatocellular carcinoma are the leading causes for liver transplantation in the Western *** infection of the transplanted liver allograft is universal in patients with detectable HCV viremia at the time of transplant and can cause a spectrum of disease,ranging from asymptomatic chronic infection to an aggressive fibrosing cholestatic *** HCV is more aggressive in the post-transplant population and is a leading cause of allograft loss,morbidity,and ***,treatment of recurrent HCV has been limited by low rates of treatment success and high side effect *** the past few years,promising new therapies have emerged for the treatment of HCV that have high rates of sustained virological response without the need for interferon based *** addition to being highly effective,these treatments have higher rates of adherence and a lower side effect *** purpose of this review is to summarize current therapies in recurrent HCV infection,to review the recent advances in therapy,and to highlight areas of ongoing research.

关键词： Hepatitis C Transplant Directly acting antivirals