Sürdürülebilir Kalkınma Amaçları
Yazarlar
- Akgule, Ali(1)
- Akkurt, Nevzat(1)
- Amin, Alla Ahmed Muhammed(1)
- Asad, Jihad(1)
- Aziz, Dara Muhammed(1)
- Aşkın, A.(1)
- Bekrentchir, Khalida(1)
- Dal, M.(1)
- Demirkiran, Uyesi Yalcin(1)
- El-Mallawany, R.(1)
- Hassan, Sangar Ali(1)
- Hussein, Ahmed Kadhim(1)
- INCILI, Gökhan Kursad(1)
- Kaçal, M.R.(1)
- Mahdi, Khaled(1)
- Menni, Younes(1)
- Say, Yakup(1)
- Sayyed, M.I.(1)
- Shanak, Hussein(1)
- Sharma, Amandeep(1)
- Özmen, Habibe(1)
Yayınlar
- MakaleAçık Erişim2025Scopus SJRQ1One-pot synthesis of quercetin-functionalized silver and copper nanoparticles for enhanced optical, antimicrobial, and computational properties
Aziz, Dara Muhammed; Amin, Alla Ahmed Muhammed; Hassan, Sangar Ali; Özmen, Habibe; INCILI, Gökhan Kursad; Say, Yakup
The emergence of multidrug-resistant bacterial strains has intensified the need for novel antimicrobial agents. Herein, we report a facile one-pot green synthesis of quercetin-stabilized silver (Qn@AgNPs) and copper (Qn@CuNPs) nanoparticles using quercetin as both reductant and capping ligand. The resulting nanocomposites were fully characterized by UV–Vis spectroscopy (surface plasmon resonance peaks at 420 nm for Ag and 580 nm for Cu), FTIR (confirming quercetin–metal coordination), SEM/EDX (spherical particles, and XRD (face-centered cubic Ag and Cu phases). Density functional theory (B3LYP/3-21G) calculations yielded frontier molecular orbital gaps of 0.164 eV for Qn@AgNPs and 0.245 eV for Qn@CuNPs, with corresponding high softness values (12.20 and 8.16 eV⁻¹), indicating enhanced electron-transfer propensity. Molecular electrostatic potential maps revealed increased charge polarization around the metal centers. Antibacterial assays against Escherichia coli and Staphylococcus aureus demonstrated minimum inhibitory concentrations of 2.11 ± 1.22 µg/mL and 4.69 ± 2.68 µg/mL for Qn@AgNPs, and 7.50 ± 0.00 µg/mL and 6.25 ± 0.17 µg/mL for Qn@CuNPs, significantly outperforming free quercetin (188 and 375 µg/mL). In silico docking against the S. epidermidis TcaR regulator (PDB: 1KZN) and E. coli DNA gyrase B (PDB: 1HSK) revealed strong binding affinities (–7.54 to − 10.15 kcal·mol⁻¹), consistent with the observed antimicrobial potency. This integrated experimental–computational study elucidates the mechanistic underpinnings of quercetin-mediated nanoparticle bioactivity and provides a rational framework for designing next-generation flavonoid-functionalized metal nanotherapeutics.
AtıfScopus12WoS11OpenAlex14
İncele - MakaleAçık Erişim2024AESTHETIZED TRAGEDY OR ANGEL WING ILLUSTRATIONS
Demirkiran, Uyesi Yalcin
The main purpose of this research is shaped by the argument that in social tragic events, the representations of tragedy encountered in the media are aestheticized and transformed into consumer goods. The tragic photograph of a father who did not let go of his daughter's hand under the rubble, which emerged especially after the earthquake disaster in our country, turned into a commodity produced and consumed both in traditional media and social media, determined the direction of the research. In the literature review, similar reflexes were found not only in natural disasters but also in dramatic images created by war and forced migration, which were chosen as samples, and were evaluated within the scope of the research. In the method of the research, the concept of tragedy is discussed through the change of reality as hyperreal in the world that has turned into a simulation universe, with a literature review. Based on Baudrillards' simulation theory, the meaning created by the transformation of tragedy into hyperreal tragedy has been tried to be interpreted. In the section of the study, From Traditional Tragedy to Tragedy in Everyday Language, the historical origin and general lines of the concept of tragedy have been tried to be explained through examples. The similarities and differences between the meaning of the historical origin of the tragedy and the definition of the concept of tragedy used in the everyday language of the modern world are mentioned. In the section of Tragedy as a Simulacrum, the subject is the reproduction of the tragedy with illustrations and pictures by individual users, not only in conventional media, but also in social media. In the research, the tragic images of war, forced migration and earthquake, which cause social tragedies, were examined through selected visual examples of the way artists and social media users were handled. Based on these visual examples, the distortion and abuse of the concept of tragedy has been tried to be explained.
- MakaleAçık Erişim2022Scopus SJRQ3USING OBSTACLE PERFORATION, RECONFIGURATION, AND INCLINATION TECHNIQUES TO ENHANCE THE DYNAMIC AND THERMAL STRUCTURE OF A TOP-ENTRY CHANNEL
Mahdi, Khaled; Bekrentchir, Khalida; Hussein, Ahmed Kadhim; Akgule, Ali; Shanak, Hussein; Asad, Jihad; Akkurt, Nevzat; Menni, Younes
This research is to incorporate three efficient ways that will increase the perfor-mance of baffled heat exchangers. The 1st technique is represented by baffle per-forating to create pores through which secondary streams pass in order to reduce main stream pressure on the flow areas. A 2nd technique represented in redesign-ing the baffle structure by replacing its square edge with the arched edge in or-der to increase the X-velocity to facilitate the flow towards the outlet and reduce the Y-velocity to reduce the values of fluid friction with the solid areas. Finally, a 3rd way was demonstrated by using the inclined baffle model. Reinforcement of the baffle structure allowed for enhanced vortices, increased thermal gradients, and thus a reinforced thermodynamic structure over the entire heat exchanger
AtıfScopus4OpenAlex4İncele - MakaleYalnız künye2019Scopus SJRQ1Investigation ofthe gamma ray shielding parameters of (100-x)[0.5Li2O–0.1B2O3–0.4P2O5]-xTeO2 glasses using Geant4 and FLUKA codes
Aşkın, A.; Sayyed, M.I.; Sharma, Amandeep; Dal, M.; El-Mallawany, R.; Kaçal, M.R.
In the present work, the radiation shielding proeprties of lithium borophosphtellurite glass system with the composition of (100-x) [0.5Li2O-0.1B2O3–0.4P2O5]-xTeO2 (x = 0, 10, 20, 30 and 40 mol%) were reported. The mass attenuation coefficient (μ/ρ) of the selected glass system (LiBPTe0, LiBPTe10, LiBPTe20, LiBPTe30 and LiBPTe40) was calculated at 356 keV, 662 keV, 1173 keV and 1330 keV photon energies by using Geant4 and FLUKA codes and the results were compared to the values obtained theoretically using WinXcom software. The correlation theory has been used to calculate the correlation coefficients (R2) between the results from WinXcom and the both simulations codes (Geant4 and FLUKA) for each sample. Moreover, some other radiation shielding parameters such as effective atomic number, photon transmission, mean free path and half value layer were calculated. The gamma photon transmission results showed that the transmission values of the 356 keV photons are lower than those of energies 662, 1173 and 1330 keV. At 356 keV, the transmission value for LiBPTe0 (at 6 cm thickness) is found to be 0.245 while at the same energy and thickness the transmission value is 0.088 for LiBPTe40. Out of all the glasses considered in present work, LiBPTe40 possesses the highest values of effective atomic number (Zeff). The Zeff values for the present glasses are 8.02, 9.55, 11.16, 12.85 and 14.64 for LiBPTe0, LiBPTe10, LiBPTe20, LiBPTe30 and LiBPTe40 respectively at 356 keV. The mass attenuation coefficient and effetive atomic number results showed that utilization 40% mol of TeO2 significantly improves the gamma ray shielding properties of the selected glass system. The shielding effectiveness of the selected samples was compared with other reference materials namely two radiation shielding glasses and four concretes used in different shielding purposes in terms of the mean free path (MFP) at 356 keV. The results revealed that the MFP of RS-253-G18 is lower than LiBPTe0sample. Moreover, the MFP of ordinary concrete is higher than the MFP of all glasses under examination, thus the investigated tellurite glasses have better attenuation features than the ordinary concrete.
AtıfScopus106OpenAlex107İncele
