Aksaray Üniversitesi Kurumsal Akademik Arşivi
DSpace@Aksaray, Aksaray Üniversitesi tarafından doğrudan ve dolaylı olarak yayınlanan; kitap, makale, tez, bildiri, rapor, araştırma verisi gibi tüm akademik kaynakları uluslararası standartlarda dijital ortamda depolar, Üniversitenin akademik performansını izlemeye aracılık eder, kaynakları uzun süreli saklar ve telif haklarına uygun olarak Açık Erişime sunar.
Güncel Gönderiler
Ameliorative effect of morin on diclofenac-induced testicular toxicity in rats: An investigation into different signal pathways
(Mashhad University of Medical Sciences, 2025) Şimşek, Hasan; Akaras, Nurhan; Gür, Cihan; Küçükler, Sefa; İleritürk, Mustafa; Kandemir, Fatih Mehmet
Diclofenac (Diclo) is a therapeutic agent used in the treatment of pain and inflammatory diseases, but it is also toxic to the human body. Morin is a flavonoid found naturally in plants and has many biological and pharmacological activities, including anti-inflammatory, anti-oxidant, and anticancer activities. This study aimed to investigate the efficacy of Morin in Diclo-induced testicular toxicity. Materials and Methods: Morin (50 mg/kg and 100 mg/kg) was administered orally for five days, while Diclo was administered intraperitoneally at 50 mg/kg on days 4 and 5. Biochemical, molecular, and histological methods were used to investigate oxidative stress, inflammation, apoptosis, and endoplasmic reticulum (ER) stress damage indicators in testicular tissue. Results: Morin treatment attenuated Diclo-induced oxidative stress damage by increasing anti-oxidant levels (SOD, CAT, GPx, GSH, Nrf-2, HO-1, and NQO1) and decreasing MDA levels, an indicator of lipid peroxidation. Morin reduced levels of the inflammatory mediators NF-κB protein. Increases in apoptotic Bax and Caspase-3 by Diclo were reduced by Morin, while decreased antiapoptotic Bcl-2 level was increased. Morin reduced Diclo-induced ER stress injury by decreasing ATF-6, PERK, IRE1, GRP-78, and CHOP levels. Also, Diclo decreased COX-2 levels. Conclusion: Overall, Morin may be an effective treatment of choice for testicular tissue damage associated with Diclo toxicity and may reduce the level of damage.
Effects of erythropoietin on cardiac morphometry in exercised male and female adolescent rats
(Urmia University - Faculty of Veterinary Medicine, 2025) Ateş, Mehmet Burak; Akçakavak, Gökhan; Özdemir, Özgür; Özdemir, Mehmet; Bozkurt, İbrahim
Erythropoietin (EPO) is a glycoprotein hormone predominantly produced in the kidneys, primarily stimulating erythroid cell proliferation in the bone marrow. The present study investigated the impact of EPO combined with swimming exercise on cardiac morphometry in adolescent male and female rats. The 4-week study involved 48 rats (24 males and 24 females), which were divided into four main groups of six males and six females each. The control group was administered intraperitoneal saline four times a week. The swimming exercise group also received intraperitoneal saline, followed by 30 min of swimming exercise, four times a week. The drug control group was given 50.00 IU kg-1 epoetin alfa intraperitoneally, four times a week. Lastly, the Swimming + Drug group received 50.00 IU kg-1 epoetin alfa intraperitoneally, four times a week, followed by 30 min of swimming exercise. The post-study measurements demonstrated that EPO administration did not result in notable alterations in crucial parameters, including the left ventricular mass index, left ventricular mass, and left ventricular posterior wall in the context of left ventricular hypertrophy in both genders. However, in female rats, EPO-only group and the combined EPO and exercise group showed significant thinning of the right ventricular wall and interventricular septum indicating potential cardiac dilatation. The results highlight the necessity of considering gender-specific responses when evaluating EPO's cardiovascular effects, particularly concerning the right ventricle, and suggest further investigation into the long-term consequences of these observed changes.
Use of the CHA2DS2‑VASc Score to Predict Concurrent Critical Coronary Artery Stenosis in Patients with Severe Carotid Artery Disease
(Wolters Kluwer Medknow Publications, 2025) Baran, O.; Yılmaz, Y.; İnci, S.; Çetinkaya, Z.; Keleşoğlu, S.
There is a significant correlation between the severity of atherosclerosis in one arterial region and the occurrence of atherosclerotic disease in other regions. Identifying and managing vascular disease in patients with multifocal arterial disease is often complex. The CHA2DS2-VASc score encompasses several cardiovascular risk factors and was initially used to assess the risk of thromboembolism, stroke, and death in patients with atrial fibrillation. In recent years, this score has been proposed to predict the prognosis of various cardiovascular diseases. Aim: The study aimed to investigate the prevalence of concomitant coronary artery disease (CAD) and the correlation between the CHA2DS2-VASc score and CAD in patients who were scheduled for carotid stenting due to carotid artery stenosis (CAS) but had no history of CAD. Methods: A total of 452 patients were included in the study, 213 with symptomatic CAS and 239 with asymptomatic CAS. The patients were separated into two groups: those with and without. Results: One hundred forty-eight (32.7%) of 452 patients had critical CAD. Multivariate logistic regression analysis showed that a high CHA2DS2-VASc score (OR: 4.283, 95% CI: 2.903–6.321, P < 0.001) was an independent predictor of the development of CAD. Receiver operating characteristic curve (ROC) analysis showed 64.9% sensitivity and 82% specificity in detecting CAD of the CHA2DS2-VASc score at >4 cutoff [Area under ROC curve = 0.781 (95% CI: 0.724–0.838), P < 0.001]. Conclusion: When our results were analyzed, a CHA2DS2-VASc score of >4 was highly significant in predicting severe CAD.
Active surface modification of thermoplastic polyurethane-oleic acid nanocomposite fibers through alkali hydrolysis
(John Wiley and Sons Inc, 2025) Karahaliloğlu, Zeynep; Hazer, Baki
Alkali hydrolysis is a simple, low-cost, and prominent surface modification method for developing more desirable scaffolds. In the presented study, two distinct concentrations (1 and 3 M) were predetermined for the hydrolysis treatments, and thermoplastic polyurethane (TPU) nanocomposite fibers with varying concentrations of oleic acid (OLE) were exposed. According to the scanning electron microscopy (SEM) images, when naked TPU or nanocomposite fibers showed any morphological changes, the interfacial bonding points of TPU-OLE nanocomposite fibers enhanced in the higher concentrations of hydrolysis solution (1 and 3 M). The average fiber diameter in pure TPU is 0.59 ± 0.04 μm, while after doping with the highest concentration of OLE, the fiber diameter decreased to 0.48 ± 0.03 μm. Additionally, at the highest NaOH and OLE concentrations, the diameter decreased from 0.85 ± 0.02 μm in 3 M/TPU to 0.61 ± 0.04 μm in 3 M/TPU-OLE3. Additionally, the surface hydrophilicity of TPU-OLE fibers was noticeably improved through alkali hydrolysis, compared to the naked TPU approximately by 70%. Furthermore, the surface characterization of fibers revealed that the surface roughness values showed a significant change with increasing alkali concentration, but were not affected by the OLE concentration. All these findings indicate that TPU, whose surface wettability, roughness, and antibacterial response are modified by mercerization and OLE addition, can be safely and successfully used in tissue engineering applications. Highlights: Polyurethane, oleic acid, and NaOH treatment were combined for tissue engineering applications. TPU/OLE nanofiber membranes were prepared by electrospinning. The surface of composite fibrillar membranes was modified alkali hydrolysis. The fiber diameter decreased after NaOH hydrolysis. Alkali hydrolysis improved the surface wettability and antibacterial response.
Transforming Wind Data into Insights: A Comparative Study of Stochastic and Machine Learning Models in Wind Speed Forecasting
(Multidisciplinary Digital Publishing Institute (MDPI), 2025) Tuğrul, Türker; Oruç, Sertaç; Hınıs, Mehmet Ali
Wind speed is a critical parameter for both energy applications and climate studies, particularly under changing climatic conditions and has attracted increasing research interest from the scientific comunity. This parameter is of interest to both researchers interested in climate change and researchers working on issues related to energy production. Based on this, in this study, prospective analyses were made with various machine learning algorithms, the long-short term memory (LSTM), the artificial neural network (ANN), and the support vector machine (SVM) algorithms, and one of the stochastic methods, the seasonal autoregressive integrated moving average (SARIMA), using the monthly wind data obtained from Bodo. In these analyses, five different models were created with the assistance of cross-correlation. The models obtained from the analyses were improved with the wavelet transformation (WT), and the results obtained were evaluated for the correlation coefficient (R), the Nash–Sutcliffe model efficiency (NSE), the Kling–Gupta efficiency (KGE), the performance index (PI), the root mean standard deviation ratio (RSR), and the root mean square error (RMSE). The results obtained from this study unveiled that LSTM emerged as the best performance metric in the M04 model among other models (R = 0.9532, NSE = 0.8938, KGE = 0.9463, PI = 0.0361, RSR = 0.0870, and RMSE = 0.3248). Another notable finding obtained from this study was that the best performance values in analyses without WT were obtained with SARIMA. The results of this study provide information on forward-looking modeling for institutions and decision-makers related to energy and climate change.
