Hakkari Üniversitesi Akademik Veri Yönetim Sistemi
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Enhancing Royal grape quality through a three-year investigation of soil management practices and organic amendments on berry biochemistry
No full textBackground: Grape composition, characterized by mineral content, hormone levels, and antioxidant enzyme activities, fundamentally influences berry quality, nutritional value, and vine health. Various viticultural practices, particularly tillage methods and organic fertilization techniques, significantly impact these compositional parameters. This study investigates the effects of these agricultural practices on grape composition to establish optimal protocols for enhanced berry production and quality. Methods: A three year study (2020–2022) evaluated the effects of soil management on grape quality in ‘Royal’ grapes (VIVC: 349). Using a Randomized Complete Block Design with four replicates of 12 vines, the study tested three tillage methods (chisel, disc harrow, and no-tillage) and four organic fertilizers (Antep radish, broccoli, olive blackwater, and a control). Treatments were analyzed for berry mineral content (macro and micronutrients), hormone levels (auxin, ABA, zeatin, SA, JA, cytokinin and GA), and antioxidant enzyme activities (SOD, POD, CAT, APX, GR, GST, G6PD and 6PGD). Results: Based on our results, the disc harrow tillage method in conjunction with olive blackwater fertilizer demonstrated superior mineral accumulation, yielding peak concentrations of nitrogen (3.72%), phosphorus (0.40%), and magnesium (0.41 mg/kg) during the 2021 growing season. Endogenous hormone levels exhibited treatment-specific responses, with maximum indole-3-acetic acid (17.33 ng/g) accumulation observed under no tillage control conditions in 2022, while abscisic acid concentrations peaked (49,172.53 ng/g) under no tillage with broccoli fertilization. Antioxidant enzyme activities were significantly enhanced under chisel tillage combined with broccoli fertilizer treatment, leading to optimal superoxide dismutase (1426.54 EU) and peroxidase (14,936.81 EU) activities. Principal component analysis revealed that the first two components explained 51.35% of total variance, with distinct temporal clustering of treatment effects. Conclusion: The optimal cultivation practice for ‘Royal’ grape variety was determined to be chisel tillage method combined with broccoli fertilization, which maximized both mineral nutrient content and hormone levels. These findings provide practical insights for viticulturists to optimize cultivation techniques for improved grape quality and nutritional value
Academic and Socio-Emotional Experiences of a Twice-Exceptional Student
No full textTwice-exceptional students, who are both gifted and present with characteristics of neurodiversity such as Autism Spectrum Disorder (ASD), possess distinctive academic and socio-emotional needs that necessitate individualized educational strategies. This qualitative case study explores the academic and socio-emotional experiences of Murat, an eighth-grade learner identified as gifted and diagnosed with ASD, from the perspectives of the student himself, his mother, and his teachers. Data were collected through semi-structured interviews and analyzed using Braun and Clarke’s six-phase reflexive thematic analysis. The findings revealed that Murat achieved success in mathematics and science, particularly within enriched, strength-oriented environments that accommodated his sensory sensitivities. Despite challenges in social skills and group participation, he benefited considerably from teacher scaffolding and interactive pedagogies. His mother’s active engagement and strong family–school collaboration emerged as pivotal factors in his developmental progress. This study extends beyond individual challenges to highlight the potential strengths that arise from by the intersection of neurodiversity and giftedness. Additionally, it contributes to the limited body of literature exploring how the notion of twice-exceptionality manifests within underrepresented educational contexts. Future research could investigate diverse socio-cultural contexts and develop strategies to enhance teacher preparation and family engagement in supporting gifted learners with ASD
Suppression of superconductivity and emergence of paramagnetism in Pr-doped Bi-2212 ceramics synthesized by the sol–gel method
No full textIn this study, Bi-2212 superconductor ceramics with Pr doping in the composition of Bi2Sr2PrxCaCu2O8+δ (x = 0.0; 0.1; 0.2; 0.3) were synthesized by the sol–gel method. An investigation was conducted to examine the effect of Pr doping on the structural, microstructural, and magnetic properties. X-ray diffraction (XRD) analysis demonstrated that the primary phase of Bi-2212 exhibited a decline in strength with increasing Pr doping, concomitant with the formation of secondary phases, including PrO2 and Bi-Sr-Ca oxides, within the structural arrangement. Scanning electron microscopy images revealed that the porous and heterogeneous microstructure observed in the undoped sample transformed into a more compact yet phase-separated texture with high Pr doping. Magnetic measurements reveal a distinct magnetic transition from a superconducting state to a paramagnetic state. The undoped sample exhibited a superconducting transition at approximately 85 K. It demonstrated a critical current density (Jc) of 8.7 × 104 A/cm2 at self-field at 10 K. Conversely, no superconducting transition was observed in the Pr-doped samples. The results obtained demonstrate that Pr doping disrupts the structural stability of the superconducting phase, promotes paramagnetic behavior through magnetic Pr3+ ions and secondary phase formation, and ultimately suppresses superconductivity
Asenkron Motorun Pekiştirmeli Öğrenme (Reinforcement Learning) ile Kontrol Katsayılarının Tespiti
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