Van Yüzüncü Yıl University Research Information System
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The Role of DGAT1-AluI and CAST-MspI Polymorphisms in Early Growth Traits of Morkaraman Lambs
No full textExploring the impact of sexual positions on ejaculation: Insights from a survey study by the Andrology Working Group of the Society of Urological Surgery in Turkey
No full textBackground: Sexual position is one of the several aspects that affects ejaculation control, which is essential for sexual pleasure. Still little is known, nevertheless, about the connection between sexual positions and ejaculation duration. Objective: To investigate the impact of various sexual positions on the duration of ejaculation and gain a deeper understanding of the elements that influence the ability to control ejaculation. Method: An online survey was carried out on a sample of 1904 heterosexual men between the ages of 18–65 years. Premature ejaculation (PE) diagnostic tool was used to define PE. Demographic, behavioral, and physiological traits that are linked to PE and non-PE groups were collected. The participants listed their preferred sexual positions and the ones they changed to during ejaculating. Also, analyses were performed between male/female active or deep/shallow thrust positions and PE status. Results: Although there were no appreciable variations in age or circumcision between PE and non-PE groups, the age of first sexual experience was associated with PE status. Groups also varied in the number of weekly ejaculations, the duration of the favored ejaculations, and the characteristics of the erection. The most preferred sexual posture was the doggy style regardless of the group. When the non-PE group felt to ejaculate, they preferred to change the position significantly more than the PE group (74% vs 67.2%; p < 0.05). However, when participants felt ejaculate, non-PE participants tended to switch to shallow thrusting positions significantly more than PE participants, who preferred deeper positions (27.1% vs. 18%; p < 0.05). Conclusion: This study underlines the relevance of considering sexual positions in controlling PE. Modifying positions during sexual intercourse may offer a non-pharmacological therapeutic alternative for improving ejaculation control. Future studies in this field might help to create tailored PE treatment strategies
Electronic and Linear Optical Properties of Ferroelectric SrHfO3 crystal
No full textIn this study, electronic and linear optical properties of ferroelectric SrHfO3 crystal were investigated using Density Functional Theory (DFT). Calculations were performed using the ABINIT package program within the framework of Generalized Gradient Approximation (GGA), employing Troullier-Martins type FHI norm-conserving pseudopotentials to efficiently represent the core-valence electron interactions. First, the electronic band structure and density of states (DOS) of the ferroelectric SrHfO3 crystal were calculated to determine the electronic behavior of the crystal. In the calculations, the lowest point of the valence band was determined as R and the lowest point of the conduction band was determined as the Γ point. Therefore, it was determined that the SrHfO3 crystal is a semiconductor with an indirect band gap of 3.256 eV. Moving on to optical properties, real (ε1) and imaginary (ε2) components of complex dielectric function were calculated to understand the optical behavior for ferroelectric SrHfO3 crystal. Finally, various optical constants of ferroelectric SrHfO3 crystal were calculated using components of complex dielectric function. These constants include reflection coefficient (R), absorption coefficient (α), volume loss function, surface loss function and refractive index (n). This work provides a fundamental understanding of the optical properties of the ferroelectric SrHfO3 crystal.</p
Effect of Mycorrhiza Applications on Some Physiological and Macro-MicroElement Contentsin Soybean (Glycine max L.) Grown under Salt Stress Condition
No full textThis study was carried out to determine the effects of mycorrhizalapplications on some biochemical and macro/micro nutrient characteristics ofsoybean (Glycine max L.) under salt stress (0, 50, 100, 150, 200 mM NaCl). In theresearch investigated chlorophyll a (17.30-22.61 µg g-1 TA), chlorophyll b (3.05-5.78 µg g-1 TA), total chlorophyll (20.46-27.72 µg g-1 TA), carotenoids (3.57-4.72µg g-1 TA), proline (0.43-1.81 µg g-1 TA), malondialdehyde (MDA) (13.1-18.3nmol g-1), and several macro- and micro-elements, including Ca (9.43-12.8 g kg1), K (9.97-11.8 g kg-1), Na (0.94-3.52 g kg-1), P (1.49-2.44 g kg-1), Mg (3.03-3.46g kg-1), Zn (3.71-7.63 g kg-1), K/Na ratio (3.32-7.17%), Mn (23.6-56.5 g kg-1), Mo(0.81-1.26 g kg-1), Cu (0.76-1.78 g kg-1), As (2.17-5.26 g kg-1), Ni (0.99-1.97 gkg-1), Pb (0.07-0.12 g kg-1), Cd (0.06-0.13 g kg-1), Co (0.06-0.08 g kg-1) and Cr(0.78-1.48 g kg-1). As a result of the study; a decrease or an initialincreasefollowed bya decrease was observed inin chlorophyll a and b, total chlorophyll,carotenoids, P, Zn, K/Na, Ca/Na, Mn, Mo, Cu, As, Ni, Pb, Cd, Co and Cr contentsin mycorrhiza -treated plants under salt stress. The levels of Ca, K and Naincreased, while Mg levels remained statistically insignificant, following afluctuating pattern.. Additionally, boron applications were found to increase thenitrogen balance index, MDA, flavonol, anthocyanin, antioxidant and phenoliccontents. Overall, the study demonstrated that mycorrhiza applications have abeneficialand regulatory effect on the biochemical composition and macro/microelement levels in soybean under salt stress.</p
Poly(CnO) and Poly(CcO) Organo-Particles Produced from Coconut Oil (CnO) and Cocoa Oil (CcO): Synthesis, Characterization, Bio and Anticancer Activity
No full textAdvancing Hybrid Fiber-Reinforced Concrete: Performance, Crack Resistance Mechanism, and Future Innovations
No full textThis research investigates the effects of steel (ST) and synthetic (SYN) fibers onthe workability and mechanical properties of HPFRC. It also analyzes their influence on thematerial’s microstructural characteristics. ST fibers improve tensile strength, fracture tough-ness, and post-cracking performance owing to their rigidity, mechanical interlocking, androbust adhesion with the matrix. SYN fibers, conversely, mitigate shrinkage-induced micro-cracking, augment ductility, and enhance concrete performance under dynamic stress whileexerting negative effects on workability. Hybrid fiber systems, which include ST and SYNfibers, offer synergistic advantages by enhancing fracture management at various scalesand augmenting ductility and energy absorption capability. Scanning electron microscopy(SEM) has been crucial in investigating fiber–matrix interactions, elucidating the effectsof ST and SYN fibers on hydration, crack-bridging mechanisms, and interfacial bonding.ST fibers establish thick interfacial zones that facilitate effective stress transfer, whereasSYN fibers reduce micro-crack formation and enhance long-term durability. Nonetheless,research deficiencies persist, encompassing optimal hybrid fiber configurations, the en-during performance of fiber-reinforced concrete (FRC), and sustainable fiber substitutes.Future investigations should examine multi-scale reinforcing techniques, intelligent fibersfor structural health assessment, and sustainable fiber alternatives. The standardizationof testing methodologies and cost–benefit analyses is essential to promote industrial de-ployment. This review offers a thorough synthesis of the existing knowledge, emphasizingadvancements and potential to enhance HPFRC for high-performance and sustainableconstruction applications. The findings facilitate the development of new, durable, andresilient fiber-reinforced concrete systems by solving current difficulties.</p
