İstanbul Sağlık ve Teknoloji Üniversitesi Kurumsal Akademik Arşivi
DSpace@İSTÜN, Üniversite mensupları 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
An examination of the relationship between perceived parental attitudes and test anxiety among 8th grade students
(Recep Kanat, 2025) Noyan, Reyhan; Keçeci, Berra
This study aimed to examine the relationship between perceived parenting styles and test anxiety levels among 8th grade students. The research was designed within the framework of the relational survey model, one of the quantitative research methods, and the sample consisted of 318 students studying in 10 public secondary schools in Eyüpsultan district of Istanbul during the 2024–2025 academic year. Data were collected through the Parental Consent Form, Demographic Information Form, Parental Attitude Scale (PAS), and Westside Test Anxiety Scale (WTAS). The collected data were analyzed using SPSS 25.0, and independent samples t-test, one-way ANOVA, Pearson correlation analysis, and multiple linear regression tests were conducted. The results revealed that female students experienced significantly higher levels of test anxiety compared to male students. Correlation analysis showed significant negative relationships between test anxiety and the dimensions of acceptance-interest and psychological autonomy. Multiple regression analysis indicated that only the psychological autonomy dimension was a significant predictor of test anxiety. No significant differences were found in test anxiety levels according to different types of 3 parental attitudes. These findings demonstrate that students’ test anxiety is significantly associated with the psychological autonomy and acceptance they perceive from their parents. The results are consistent with previous studies in the literature, showing that democratic parenting styles and psychologically supportive approaches have a reducing effect on test anxiety. In this regard, the study contributes to the understanding of psychosocial factors influencing test anxiety. Based on the findings, it can be suggested that strengthening guidance and counseling services, expanding parental awareness programs, and encouraging teachers to collaborate with families are crucial steps in reducing students’ test anxiety. Furthermore, parents adopting approaches that provide greater psychological autonomy and acceptance may help students cope more effectively with test anxiety.
Anatomic safety profile of a novel mini external fixator for proximal crescentic osteotomy in hallux valgus correction: A cadaveric study
(Springer Nature Link, 2026) Coşkun, Osman; Nteli Chatzioglou, Gkionoul; Gürses, İlke Ali; Ok, Fatma; Gayretli, Özcan; Erdil, Mehmet
Purpose The proximal crescentic osteotomy is an effective procedure for hallux valgus correction, but stable fixation remains challenging. Our previous biomechanical study suggested that the MEF may offer comparable or greater stability than a specific cannulated screw fixation construct in a cadaveric model. This study aims to evaluate the anatomical safety of the MEF by investigating its relationship with critical neurovascular structures and tendons. Methods An anatomical dissection study was performed on ten foot cadaveric specimens. The MEF was applied using five mini-Schanz pins inserted in predefined positions. Following fixation, a layer-by-layer dissection was conducted to expose the dorsalis pedis artery, superficial cutanous branches of the foot, the superficial venous arch, and the extensor hallucis lon gus and brevis tendons. The distance from each pin to these structures and any iatrogenic injuries were recorded. Results The superficial venous arch was injured at low rates by the medial distal pin (20%), the medial proximal pin (10%), and the lateral distal pin (20%). Tendon injury was more frequent, with the extensor hallucis longus tendon being injured by 20–30% of pins, and the extensor hallucis brevis tendon by the lateral intermediate and distal pins (20% each). Conclusion The application of the MEF for first metatarsal fixation appears anatomically safe with respect to major arteries and nerves. The consistent avoidance of the dorsalis pedis artery and key sensory nerves is a significant advantage over some established techniques. However, surgeons should be aware of the potential risk to the superficial venous arch and extensor tendons during pin placement. These findings support further investigation of the MEF for proximal crescentic osteotomy f ixation.
Efficient and facile synthesis of hydroxy-functionalized hexagonal boron nitride nanosheets by ion-assisted liquid phase exfoliation method
(Eskişehir Osmangazi University, 2025) Yaman Uzunoğlu, Gülşah
Hexagonal boron nitride (h-BN) nanosheets have attracted significant attention due to their unique mechanical, thermal, and electronic properties. Their biocompatibility, thermal conductivity, chemical stability, and versatility make them indispensable in cutting-edge technologies. Hydroxy-functionalized h-BN nanosheets (h-BNNS-OH) exhibit immense potential in various applications, including electrochemical energy storage, drug delivery systems, and heat spreaders in thermal management systems. This study focuses on the hydrothermally ion-assisted liquid-phase exfoliation of h-BN powder to produce few-layer h BNNS-OH. The exfoliation process involves hydrothermal treatment of bulk h-BN in the presence of concentrated aqueous solution of KOH and NaOH at 180 °C, followed by sonication for dispersion of h-BNNS-OH in water. Characterization of h-BNNSs was performed using powder X-ray diffraction (XRD), Raman spectroscopy, Fourier-transform infrared spectroscopy (FTIR), transmission electron microscopy (TEM), scanning electron microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDS). The resulting exfoliated h-BNNSs are hydroxyl-functionalized on their surface. This study demonstrates the effectiveness of the successive execution of the hydrothermal treatment in the presence of excess alkali metal hydroxides and probe sonication as a facile and efficient exfoliation process, resulting in dispersions of h-BNNS-OH in water with remarkably high stability (beyond 9 weeks) and high product yield (17 %) at only one exfoliation cycle.
Impact of extraction solvents on total antioxidant capacity of barberry (berberis crataegina) plant
(Sivas Cumhuriyet University, 2025) Özdemir Olgun, Fatoş Ayça; Demirata Öztürk, Birsen
Defense mechanisms involving antioxidant molecules play a key role in neutralizing free radicals formed in the human body. It is important to determine the content of these molecules, which have become important in human nutrition in recent years, in consumed foods. This study aims to determine the total antioxidant capacity of the barberry (Berberis Crataegina) plant, which is consumed in many regions of Turkiye. For this purpose, firstly, barberry plant samples were collected from Mersin in summer season, the extracts were prepared with different solvents and CERAC method was used to determine the total antioxidant capacities of the samples. The highest value of total antioxidant capacity was obtained by 80 % (v/v) methanol solution for flesh part of the fruit. Total phenolic compound and total antioxidant capacities of the flesh part of barberry samples were calculated as 1.954 mmol gallic acid (GA) g-1 and 1.288 mmol Tr (TR) g-1, by Folin-Ciocalteu method and Cerium Reducing Antioxidant Capacity Assay (CERAC), respectively.
Application of liquid-liquid microextraction techniques for trace level determination of organic/inorganic analytes in biological, medical, environmental and forensic samples
(Elsevier, 2025) Chormey, Dotse Selali; Bodur, Sezin Erarpat; Öztürk Er, Elif; Zaman, Buse Tuğba; Bodur, Süleyman; Şaylan, Meltem; Dalgıç Bozyiğit, Gamze; Serbest, Hakan; Bakırdere, Sezgin
The drawbacks of the conventional liquid-liquid extraction method have been greatly alleviated with the advent of liquid-liquid microextraction methods, which are being actively utilized as effective sample preparation tools for biological, medical, environmental and forensic samples. The complex nature of these sample matrices tend to hinder the accuracy and precision of analytical measurements, and have the potential to cause false positive and false negative results. With sample preparation remaining an integral part of accurate determination of organic and inorganic analytes in complex samples, liquid-liquid microextraction as an efficient sample preparation approach facilitates the acquisition of analytes in final forms that are suitable for modern and classical analytical instruments. The use of very low solvent volumes in liquid-liquid microextraction methods leads to very high enrichment factors, and the availability of different extractants paves way for selective analyte extractions. Recent calls for greener approaches of analysis have been met with the introduction of several green solvents that boost the greenness of liquid-liquid microextraction methods and equally maintain the superiority of the methods. © 2024 Elsevier Inc. All rights are reserved, including those for text and data mining, AI training, and similar technologies.
