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- MakaleAçık Erişim2026Scopus SJRQ3The Effect of Virtual Reality Training on Basic Hitting Performance in Tennis
ÇELİK, Hüsniye; TOZOĞLU, Erdoğan; AĞDUMAN, Fatih
The aim of this study was to investigate the effect of virtual reality (VR) training on basic stroke performance in tennis. In the fall semester of the 2023-2024 academic year at Atatürk University, 20 students without prior tennis experience participated. They were divided into two equal groups: the control group, which received only traditional training, and the experimental group, which received a combination of VR and traditional training. Each group included five male and five female students, all participating in an 8-week training program. A pre-test-post-test control group experimental design was used. Data were collected through a VR application and a performance test administered before and after training. Descriptive statistics and normality tests were conducted, with paired t-tests for intra-group comparisons and ANCOVA for inter-group comparisons, using SPSS 25. Results showed significant improvements in stroke performance in both groups. However, analysis revealed no statistically significant difference in forehand stroke performance between groups. In contrast, the experimental group demonstrated significant improvement in backhand performance compared to the control group. Findings suggest that both VR-based and traditional methods can effectively enhance basic stroke performance in tennis. Specifically, VR training proved particularly effective for improving backhand strokes, while no additional benefit was observed for forehand strokes compared to traditional training.
- MakaleAçık Erişim2025Scopus SJRQ3Chemical and bioactive potential of the nests of Polistes nimpha, Polistes dominula, and Vespa crabro (Hymenoptera: Vespidae)
Ertürk, Ömer; Can, Zehra; Yaman, Mustafa
This work was accomplished to establish the chemical components and bioactivity potential of the nest materials of Polistes nimpha (Christ), Polistes dominula (Christ), and Vespa crabro (L.). The biological and chemical compounds of materials and their molecular functionalities were detected using FRAP (ferric reducing antioxidant power) method, DPPH (2,2-diphenyl-1-picryl-hydrazyl-hydrate) free radical method, and Energy Dispersive X-Ray Analysis. Finally, the bioactivity potentials of nest extracts were assayed and phenolic components were determined. C, N, O, Na, Ca, K, Mg, Al, Si are the elemental components of the nest materials. All nest extracts of three species had high biological activity against nine bacteria and one fungus causing common infections. The maximum antibacterial and antifungal activity was seen when gram-negative Pseudomonas aeruginosa, gram-positive Bacillus cereus, and gram-positive Candida albicans were exposed to ethanol extracts of nest samples in 25 μL. High antioxidant activity can be found in the nest extracts. These extracts might help researchers find novel antifungal and antibacterial substances.
- MakaleAçık Erişim2020RP-HPLC-UV Analysis of the Phenolic Compounds, Antimicrobial Activity Against Multi-Drug Resistant Bacteria and Antioxidant Activity of Fruit and Seed of Diospyros lotus L.
Akar, Zeynep; Karakurt, Aylin; Okumus, Funda; Cinemre, Sedanur; Duzgun, Azer Ozad; Akar, Bulent; Can, Zehra
The object of the present study was to investigate the antioxidant, antimicrobial activity and phenolic compounds of fruit and seeds of Diospyros lotus L. The fruits consumed by humans as nutrients were harvested from the plants that grow naturally in the province of Trabzon-Akçaabat, Eastern Black Sea Region of Turkey. The antioxidant activities of fruit and seeds of Diospyros lotus were determined by using four methods (% DPPH radical scavenging activity, FRAP antioxidant power determination, CUPRAC reducing antioxidant activity and total phenolic content (TPC) in five different proportion of methanol-water extracts. All extracts of fruit and seeds of D. lotus analyzed through whole antioxidant analysis methods showed significant antioxidant activity. In addition, antimicrobial activity of fruit and seeds extracted with DMSO was determined against seven standard bacteria and three multi-drug resistance clinical strains. Although fruit extracts did not have the antimicrobial activity against bacteria, seeds showed antimicrobial effect to both standard strains (Gram-negative and Gram-positive) and antibiotic resistance clinical isolates (Klebsiella pneumoniae carrying blaKPC, Acinetobacter baumannii, harboring blaOXA-23 gene and resistance to colistin, and multi-drug resistant Pseudomonas aeruginosa). MICs’ value of plant seed extracts for standard strains was 0.75-25 mg/mL and antibiotic resistant clinical bacteria were 12.5 and 25 mg/mL. Additionally, phenolic compounds in methanol extracts of fruit and seeds were also determined in by HPLC using 19 standards. Gallic acid and chrysin phenolic compounds were the major phenolic compounds in fruit and seeds, respectively.
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İncele - DergiInternational Journal of Secondary Metabolite
- DergiPamukkale Journal of Sport Sciences