Recep Tayyip Erdoğan Üniversitesi Kurumsal Akademik Arşivi
DSpace@RTEÜ, Recep Tayyip Erdoğan 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 yayınların etkisini artırmak için telif haklarına uygun olarak Açık Erişime sunar.
Güncel Gönderiler
Examining the effects of ARCS-based urinary catheter education on first-year nursing students' learning motivation, self-efficacy and clinical skill levels
(Elsevier, 2025) Erden, Yasemin; Uludağ, Elanur; Albayrak, Özlem
Aim: This study aims to examine the effect of urinary catheter application training based on the ARCS motivation model on learning motivation, self-efficacy and skill levels of nursing students. Background: Effective clinical skills training in nursing requires motivational and supportive teaching methods. The ARCS model promotes active learning through attention, relevance, confidence and satisfaction. Design: The study employed a randomised controlled pre-test-post-test experimental design. Method: The study was conducted between April and June 2025 with 56 students studying in the nursing department of a university in eastern Turkey and taking the course of basic principles and practices in nursing. The participants were divided into experimental and control groups by a simple randomisation method. Both groups were trained in urinary catheterisation with the traditional method. The students in the experimental group received urinary catheterisation training based on the ARCS motivation model. Data were collected using the "Introductory Information Form", "Motivation Scale for Instructional Material", “Academic Self-Efficacy Scale” and "Urinary Catheter Application Skill Assessment Form”. Results: The students in the experimental group showed a statistically significant increase in the "Attention", "Relevance", "Confidence", “Satisfaction” dimensions and “Skill Assessment Form” scores in the post-test (p < 0.05). However, no significant difference was detected in terms of “Academic Self-Efficacy” scale scores in both intra- and inter-group comparisons (p > 0.05). Conclusion: The findings of the study revealed that the urinary catheter application training structured based on the ARCS motivation model significantly improved nursing students' learning motivation and psychomotor skills. However, the training did not have a statistically significant effect on students' academic self-efficacy levels.
Increase in color stability through amino acid copigmentation in pomegranate juice during storage
(Amer Chemical Soc, 2025) Hamzaoğlu, Fatmagül; Türkyılmaz, Meltem; Özkan, Mehmet
Pomegranate juice (PJ) loses its impressive purple-red color during storage. Exploiting the copigmentation effect of amino acids could be a solution to this problem. This study was the first to investigate the effect of amino acids with different chemical structures (aspartic acid, phenylalanine, valine, asparagine, and lysine) on the storage stability of anthocyanins (ACNs) and color in PJ. All amino acids formed complexes with anthocyanins [r = (-0.615)-(-0.968)]. Aspartic acid was the only amino acid to show a significant increase in the stability of total monomeric anthocyanin (4.7%) and cyanidin-3-glucoside (Cy-3-glu, 7.4%) and in A max value (4.7%). Cy-3-glu, major anthocyanin in PJ, showed the greatest increase in stability in the presence of aspartic acid, followed by asparagine (3.7%), valine (3.1%), and phenylalanine (2.9%). Lysine reacted with all anthocyanins [r = (-0.921)-(-0.991)] and caused a strong decrease in A max (19.2%). Amino acids prevented browning before storage by forming a chelate with Cu (II) or inhibiting the oxidation of quinones. Aspartic acid is recommended for color stabilization, especially in juices rich in Cy-3-glu, due to its high copigmentation with Cy-3-glu and inhibition of browning.
Religious devotion scale: validity and reliability study
(Erciyes Üniversitesi, 2025) Karaca, Faruk; Kırıcı, Enes Hamza
Religious devotion is the religious person's shaping his/her life on the axis of religion, living for his/her religion, and risking all kinds of sacrifices and altruism on behalf of his/her religious belief. In this study, it was tried to determine what religious devotion is and what its dimensions are and in this direction, it was aimed to develop a measurement tool to measure religious devotion. In the scale development process, a question pool of 30 items was created and applied to a population of 30 people by taking expert opinion and the statements that were difficult to understand were edited. The scale was administered to people aged 40 years and above who characterized themselves as "religious" and "very religious" with reference to subjective perception of religiosity and minimum age of religious maturity. In order to determine the construct validity of the scale, exploratory factor analysis was conducted with 250 participants, and as a result of this analysis, a three-dimensional structure consisting of 17 items was obtained. The dimensions were named as "religious consciousness", "action-sacrifice" and "religious fanaticism" respectively. In order to confirm the structure formed as a result of the exploratory factor analysis, a different application was carried out with 350 participants. The results of the confirmatory factor analysis applied to the data obtained supported the three-factor structure of the scale. When the psychometric data produced about the scale were evaluated, it was concluded that this scale developed to measure "religious devotion" is a sufficiently valid and reliable measurement tool.
Thermal performance improvement in the solar air collector system using reduced graphene oxide nanoparticles
(Springer, 2025) Sathyamurthy, Ravishankar; Ali, Hafiz Muhammad; Ali, Usman; Cüce, Erdem; Gopalsamy, Selvakumar; Bahaidarah, Haitham M. S.; Kadhim, Saif Ali
This study experimentally demonstrates that enhancing solar absorptance and heat transfer in a single-pass solar air collector can be achieved through a coating of reduced graphene oxide-doped black paint. The introduction of carbon-based nanoparticles results in an augmented thermal conductivity in a turpentine-oil nanofluid. Subsequently, a homogeneous blend of the thermally modified turpentine oil with the black paint is coated onto the absorber plate, resulting in a consequent increase in absorptance across the incident solar spectrum. In this regard, two different solar air collectors were fabricated, namely (i) a single-pass flat plate SAC with BP coating and (ii) a single-pass flat plate SAC with rGO-doped BP coating as surface coating. The thermal performance of both solar air collectors was evaluated across a range of airflow rates. Data obtained during the experiments demonstrated that the collector with the surface coating exhibited superior thermal response: specifically, higher absorber temperatures, increased exit air temperatures, and an improved temperature difference between the exit and inlet air streams. However, the increase in the flow rate of air through the rectangular channel decreases the absorber, exit air temperature, and temperature difference between the exit and inlet of the rectangular channel. Furthermore, the results also showed that at the higher flow rate of air through the channel, the Nusselt number and the heat transfer coefficient increase from coated and uncoated absorber plates. From the experimental results, the average daily efficiency of the single-pass SAC with BP coating ranged from 30.12 to 67.2% for a flow rate of 0.01 to 0.03 kg s−1. However, with surface coating and improved surface roughness, the daily efficiency increased to 34.6 to 79.5%. Furthermore, in this study, a response surface methodology is employed to optimize the exit, absorber temperature, and the change in temperature between exit and inlet, considering the impact of solar radiation, ambient temperature, and concentration of nanoparticles. Moreover, the correlations are expressed in the form of a quadratic function.
Rapid synthesis of highly monodisperse AgSbS2 nanocrystals: unveiling multifaceted activities in cancer therapy, antibacterial strategies, and antioxidant defense
(Beilstein-Institut Zur Forderung der Chemischen Wissenschaften, 2025) Ulusu, Funda; Sarılmaz, Adem; Ulusu, Yakup; Özel, Faruk; Kuş, Mahmut
Nanocrystals (NCs) of silver antimony sulfide (AgSbS2) in the cubic phase were successfully synthesized using the hot-injection method. This study is the first to investigate the cytotoxic effects of these NCs on human breast adenocarcinoma (MCF-7), colon cancer cell lines (HT-29), and fibroblast cell lines (L929). Additionally, the antibacterial properties of the NCs against gram-positive (Staphylococcus aureus and Bacillus subtilis) and gram-negative (Escherichia coli) pathogenic bacteria were evaluated, along with their DPPH scavenging activities. The crystal structure of the synthesized NCs was elucidated through XRD analysis, revealing characteristic diffraction peaks corresponding to the (111), (200), (220), (311), and (222) planes of the AgSbS2phase. TEM and SEM techniques were used to comprehensively characterize the NCs. The results showed that spherical NCs were predominantly formed, with an average diameter of approximately 32 ± 10 nm. Cytotoxicity studies demonstrated a significant inhibitory effect of the NCs, particularly on cancer cell lines (MCF-7 and HT-29), in a dose-dependent manner over a 24 h period. These findings highlight the potential of the NCs as anticancer agents. Furthermore, the synthesized NCs demonstrated potent anti-bacterial properties against the tested microorganisms and notable antioxidant effects by efficiently eliminating DPPH activity. This research highlights the potential of AgSbS2NCs as versatile agents with applications in biomedical and environmental domains, including cancer therapy, antimicrobial strategies, and free radical neutralization.
