Synthesis and properties of sol-gel derived transparent ZnO thin films: Effect of indium doping

Eyüp Fahri Keskenler,Güven Turgut 한양대학교 세라믹연구소 2016 Journal of Ceramic Processing Research Vol.17 No.12

High quality and transparent indium doped ZnO (IZO) thin films were deposited on glass substrates by sol-gel spin coatingmethod. Zinc acetate and indium (III) chloride were used as precursor solution materials. Structural, morphological, andoptical properties of the films were investigated as a function of indium doping ranging from 0.5% to 2.0 at % by X-raydiffraction, scanning electron microscopy, transmission and energy dispersive X-ray techniques. The films had polycrystallinenature and exhibited a hexagonal wurtzite structure with preferred c-axis orientation. The film surfaces exhibited uniformparticle-like and granular morphologies. The optical transmittance spectra of the undoped ZnO and IZO films were taken inthe wavelength ranging from 350-1000 nm. The transmittance IZO films compared to undoped ZnO has increased withincreasing indium content. The chemical composition of the films indicated the presence of indium element in the ZnO films. These results make IZO thin films an attractive candidate for transparent material applications such as solar cells.

Double-imprinted potentiometric sensors based on ligand exchange for the determination of dimethoate

Eyüp Bektaşoğlu,Ebru Birlik Özkütük,Arzu Ersöz,Rıdvan Say 한국화학공학회 2015 Korean Journal of Chemical Engineering Vol.32 No.8

This paper describes a dimethoate imprinted polymeric potentiometric sensor for the determination of dimethoate that was designed by dispersing the dimethoate-imprinted polymer in dibutyl phthalate plasticizer and then embedded in polyvinyl chloride matrix. The method is based on molecularly imprinted polymer (MIP), which can be synthesized by using dimethoate as a template molecule, chitosan-Cd(II), and 3-mercaptopropyl-trimethoxysilane as a functional monomer and TEOS, and ephychlorohydrin as a cross-linking agent. We have studied a method for the selective binding behavior of dimethoate compounds on the surface of imprinted polymers which is prepared using ligand-exchange (LE) (chitosan-Cd(II)) monomer. The MIP-LE-1 and MIP-LE-2 based membranes have shown a detection limit of 4.3×10−6mmolL−1 and 3.5.10−5 mmolL−1, respectively. The sensor has exhibited a response time of 35min for MIP-LE-1 and 120min for MIP-LE-2. They are stable for more than three months.

Efficacy and Safety Profile of Risperidone Long-acting Injection in Adolescents in a Real-life Setting

Ulku Akyol Ardic,Mustafa Küçükköse,Sevim Berrin Inci,Eyüp Sabri Ercan 대한정신약물학회 2018 CLINICAL PSYCHOPHARMACOLOGY AND NEUROSCIENCE Vol.16 No.1

Objective: Risperidone long-acting injection (RLAI) was shown to be an alternative option in adult patients, but there is not available data in child and adolescents about this medication. The aim of this study is to evaluate the safety and efficiency profile of RLAI in a group of adolescents. Methods: Eleven cases with conduct disorder and severe aggressive behaviors were initiated treatment with risperidone oral form. All cases were then shifted to RLAI 25 mg injection in each 15 days due to poor compliance to oral risperidone treatment. Efficiency of treatment included indicators of clinical severity and improvement, which were evaluated by Clinical Global Impression-Severity (CGI-S) and Improvement (CGI-I). Safety evaluation was performed by using Extrapyramidal Symptoms Rating Scale, and by monitoring body weight. Follow-up visits were done at the treatment initiation, and 8th, 16th, and 24th weeks of first injection. Results: Study included 9 girls, and 2 boys, with a mean age of 14.9±1.0 years. The CGI-S scores decreased from 6.6±0.5 at the beginning to 2.2±1.1 at the last visit (p<0.001), which is a very significant decrease through better clinical level. The CGI-I scores were also improved significantly from 2.4±0.5 to 1.9±0.5 at 24th week (p=0.001). Safety parameters were also showed favorable results, which there was no significant weight gain (p=0.076), and well-tolerated extrapyramidal adverse effects. Conclusion: Our results showed that RLAI is an efficient and safe medication option in the treatment of psychiatric disorders and severe behavioral problems in adolescents with low-compliance to oral treatment in our cases

Reliability of Fossae Lumbales Laterales and Pelvic Incidence for Estimating Transsacral Corridors Assessed Using Reconstruction Computed Tomography

Orhan Balta,Mehmet Akif Yılmaz,Kürşad Aytekin,Recep Kurnaz,Harun Altinayak,Mehmet Burtaç Eren,Eyüp Çağatay Zengin 대한정형외과학회 2022 Clinics in Orthopedic Surgery Vol.14 No.3

Background: The present study aimed to evaluate the effect of fossae lumbales laterales and pelvic incidence (PI) on transsacral corridors. Methods: Patients who underwent pelvic computed tomography (CT) during routine therapy in a single center between 2015 and 2020 were retrospectively reviewed. The patients’ age and sex were documented during CT examination. Measurements were performed for both the upper and second sacral segments. Height and weight of the patients were determined using appropriate tools and body mass index (BMI) was calculated. Transsacral corridors were identified in true coronal and true sagittal planes and their width was determined as the maximum gap measured so that no screws could come out of the transacral corridors. PI was measured. Results: Our study included 244 (57%) male and 184 (43%) female patients, who had a mean age of 49.3 ± 14.15 years (range, 18–89 years) and a mean BMI of 26.57 ± 2.38 kg/m2. No statistically significant correlation was found between the detection of the dimple sign in physical examination and the presence of an adequate corridor. The PI was statistically significantly higher in the patients with dimples (p < 0.001). PI of the female patients was higher than that of the male patients (p = 0.026). The correlation between PI and the existence of adequate corridors for S1 and S2 screws was not statistically significant (p = 0.858 and p = 0.129, respectively). On the relationship between the presence of adequate S1 and S2 corridors where transsacral screws could be sent, an inverse relationship was detected: if the S1 transsacral corridor was adequate, the S2 corridor was inadequate or vice versa. Conclusions: We could not obtain meaningful results on the use of the dimples of Venus or PI instead of CT to evaluate the adequacy of transverse corridors. Nevertheless, we confirmed that an increased PI was associated with the presence of dimples of Venus.

Optimization of hybrid composite plates using Tsai-Wu Criteria

Mehmet Hanifi Doğru,İbrahim Göv,Eyüp Yeter,Kürşad Göv 국제구조공학회 2023 Structural Engineering and Mechanics, An Int'l Jou Vol.88 No.4

In this study, previously developed algorithm is used for Optimization of hybrid composite plates using Tsai-Wu criteria. For the stress-based Design Optimization problems, Von-Mises stress uses as design variable for isotropic materials. Maximum stress, maximum strain, Tsai Hill, and Tsai-Wu criteria are generally used to determine failure of composite materials. In this study, failure index value is used as design variable in the optimization algorithm and Tsai-Wu criteria is utilized to calculate this value. In the analyses, commonly used design domains according to different hybrid orientations are optimized and results are presented. When the optimization algorithm was applied, 50% material reduction was obtained without exceeding allowable failure index value.

Complete recovery of pyoderma gangrenosum after successful treatment of underlying hairy cell leukemia with cladribine

Anıl Tombak,Sinan Aygün,Ebru Serinsöz,Eyüp Naci Tiftik 대한내과학회 2015 The Korean Journal of Internal Medicine Vol.30 No.5

symptoms of PG [3-5]. Patients presenting with PG should be carefully examined for an underlying hematological malignancy with detailed anamnesis, a physical examination, and laboratory testing. HCL can be easily diagnosed in patients with pancytopenia, splenomegaly, and typical hairy cells, and skin ulcers can be related to PG, as in our patient. Although the histopathological changes are not specific to PG, biopsies of the lesions must be performed, as these lesions can also be related to infiltration of leukemic cells. Once HCL and PG are diagnosed, the main treatment target should be HCL, as PG will completely recover in a few months with the successful treatment of HCL using cladribine, as in our patient.