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Corrigendum to “Physical, chemical and radiation shielding properties of metakaolin-based geopolymers containing borosilicate waste glass” [Radiat. Phys. Chem. 224 (2024) 112075] (Radiation Physics and Chemistry (2024) 224, (S0969806X2400567X), (10.1016/j.radphyschem.2024.112075))
No full textIn the above-mentioned article, the authors regret that the Funding section should be only for Jouf University as below. This work was funded by the Deanship of Scientific Research at Jouf University under grant No. (DSR-2021-03-03132). The article is now correct online. The authors apologise for inconvenience caused. © 2024 The Author(s
Development of optoelectronic properties of a novel graphene oxide/copper phthalocyanine composite: Production and photoelectric characteristics of diode
No full textNovel copper (II) phthalocyanine bearing 3-chloro-4-fluorophenoxy (2) and its graphene oxide (GO)-based composites (2a-2f) were synthesized and characterized. The single crystal of the starting material compound (1) was analyzed for the first time using X-ray diffraction in this study. Phthalocyanine composites containing different percentages of graphene oxide by weight (wt.% GO) were prepared. SEM (scanning electron microscopy) results confirmed the interaction between GO and CuPc (2). In this study, the effects of concentration on the optoelectronic and conductivity properties of CuPc (2), as well as the influence of graphene oxide on the optoelectronic properties of CuPc (2) were extensively investigated. Additionally, the surface morphological properties of the phthalocyanine film were analyzed. Finally, an n-Si/CuPc (2)/Al diode was fabricated, and its photoelectric properties were investigated. © 2024 Elsevier B.V
Investigation of the physical and superconductivity properties of Ni3AC (A: Mg, Zn and Cd)
No full textThis study investigates the electronic and superconducting properties of Ni3AC (A: Mg, Zn, and Cd) antiperovskites through first-principles computational methods. Importantly, Ni3MgC has been identified as a superconductor with a transition temperature (Tc) of 8.644 K, while Ni3ZnC and Ni3CdC exhibit Tc values of 2.172 K and 3.861 K, respectively, in remarkable agreement with experimental. The electron–phonon interaction strength in these materials suggests medium-coupling superconductivity. This study provides significant insights into the mechanisms driving superconductivity in metal-carbide antiperovskites, identifying opportunities for their use in advanced technologies. © 2024 The Author
Investigation of tribological performance of PAI and PAI/graphite/PTFE composites under different mediums and working conditions
No full textPurpose: This study aims to investigate the tribological performance of neat polyamide-imide (PAI) and PAI composite (PAI + 12% graphite + 3% polytetrafluoroethylene [PTFE]) under varying mediums and conditions, including dry sliding, distilled water and seawater lubrication, to determine their suitability for high-stress applications. Design/methodology/approach: Tribological tests were conducted using a pin-on-disc setup with AISI 316 L stainless steel (SS) as counterface. Experiments were carried out under loads of 150 and 300 N and sliding speeds of 1.5 and 3.0 m/s. Values of temperatures, friction coefficients and wear rates were recorded to analyze the effect of fillers and lubrication mediums. Findings: The PAI composite outperformed the neat PAI under all conditions, showing significant reductions in friction coefficients and wear rates. Seawater lubrication yielded the best results, achieving friction coefficients of 0.05 and 0.01 and specific wear rates of 18.10−16 m²/N and 1.10 −15 m²/N, for neat PAI and PAI composite, respectively. Graphite and PTFE fillers enhanced lubrication, reduced surface temperatures and mitigated abrasive and adhesive wear mechanisms. Superior cooling and lubrication effects of the seawater contributed to these improvements. Originality/value: Previous studies mainly focused on dry sliding and distilled water lubrication for the PAI and its composites, with no research on the seawater conditions. This study compares the tribological behaviors of the neat PAI and PAI composite against AISI 316 L SS under dry sliding, distilled water and seawater lubrication. Peer review: The peer review history for this article is available at: https://publons.com/publon/10.1108/ILT-08-2024-0302/ © 2024, Emerald Publishing Limited
Axially Disubstituted Silicon(IV) Phthalocyanine as a Potent Sensitizer for Antimicrobial and Anticancer Photo and Sonodynamic Therapy
No full textThe unique properties of phthalocyanines (Pcs), such as strong absorption, high photostability, effective singlet oxygen generation, low toxicity and biocompatibility, versatile chemical modifications, broad spectrum of antimicrobial activity, and synergistic effects with other treatment modalities, make them a preferred superior sensitizer in the field of antimicrobial photodynamic therapy. The photodynamic and sonodynamic activity of 3-(3-(diethylamino)phenoxy)propanoxy substituted silicon(IV) Pc were evaluated against bacteria and cancer cells. Stability and singlet oxygen generation upon light irradiation and ultrasound (1 MHz, 3 W) were assessed with 1,3-diphenylisobenzofuran. The phthalocyanine revealed high photostability in DMF and DMSO, although the singlet oxygen yields under light irradiation were low. On the other hand, the phthalocyanine revealed excellent sonostability and caused a high rate of DPBF degradation upon excitation by ultrasounds at 1 MHz. The silicon phthalocyanine presented significant bacterial reduction growth, up to 5 log against MRSA and S. epidermidis upon light excitation, whereas the sonodynamic effect was negligible. The phthalocyanine revealed high activity in both photodynamic and sonodynamic manner toward hypopharyngeal tumor (FaDu, 95% and 42% reduction, respectively) and squamous cell carcinoma (SCC-25, 96% and 62% reduction, respectively). The sensitizer showed ca. 30% aldehyde dehydrogenase inhibition in various concentrations and up to 85% platelet-activating factor acetylhydrolase for 0.25 μM, while protease-activated protein C was stimulated up to 66% for 0.75 μM. © 2025 Elsevier B.V., All rights reserved
Nuclear and radiation shielding performance of synthesized geopolymers with addition of CRT waste glass composites
No full textThe use of geopolymers (GPs) is a sustainable way of providing cheaper concrete binders for buildings. In an attempt to improve the physical, microstructural, and radiation protection properties of new geopolymers and find an environmentally safe way of reusing cathode ray tube (CRT) waste glass, a composition of G and CRT glass was prepared and studied. The CRT glass-infused geopolymer samples were prepared using the powder metallurgy process. The concentrations of CRT glass in the doped G were 0, 10, 20, and 30 wt %, where the samples are coded as G, G-10CRT, G-20CRT, and G-30CRT, respectively. The density of increased with CRT doping from 1.86 g/cm3 to 2.34 g/cm3. XRD spectra of the samples showed well-defined peaks which elucidates the presence of crystal phases. The CRT-free G sample revealed that Si, O, Na and Al were the main elements. On the other hand, the concentrations of heavy Z-elements (such as Pb, Ba and Sr) increased with CRT glass content. The (mass) stopping powers (Sp) of β-particles were in the range 1.56–13.71 MeVcm2/g for G, 1.55–12.9 MeVcm2/g for G-10CRT, 1,53–12.67 MeVcm2/g for G-20CRT, and 1.52–12.44 MeVcm2/g for G-30CRT. The ranges of the charged particles followed the order: G > G-10CRT > G-20CRT > G-30CRT. The values of the fast neutron removal cross-section for G, G-10CRT, G-20CRT and G-30CRT were 0.0650 cm−1 for G, 0.0706 cm−1 for G-10CRT, 0.0743 cm−1 for G-20CRT, and 0.0748 cm−1 for G-30CRT. The introduction of CRT glass into G also increased the thermal neutron absorption cross-section of the geopolymers. © 2025 Elsevier Lt
Development of optoelectronic properties of a novel graphene oxide/ copper phthalocyanine composite: Production and photoelectric characteristics of diode
No full textNovel copper (II) phthalocyanine bearing 3-chloro-4-fluorophenoxy (2) and its graphene oxide (GO)-based composites (2a-2f) were synthesized and characterized. The single crystal of the starting material compound (1) was analyzed for the first time using X-ray diffraction in this study. Phthalocyanine composites containing different percentages of graphene oxide by weight (wt.% GO) were prepared. SEM (scanning electron microscopy) results confirmed the interaction between GO and CuPc (2). In this study, the effects of concentration on the optoelectronic and conductivity properties of CuPc (2), as well as the influence of graphene oxide on the optoelectronic properties of CuPc (2) were extensively investigated. Additionally, the surface morphological properties of the phthalocyanine film were analyzed. Finally, an n-Si/CuPc (2)/Al diode was fabricated, and its photoelectric properties were investigated
Research hotspots, trends and opportunities on the metaverse in health education: a bibliometric analysis
No full textPurpose: The metaverse offers great potential for creating a new educational environment with unique experiences. Currently, it has been integrated into many stages of education, including classroom study aids, clinical skill interaction and image training simulators, thanks to a new generation of Internet applications. This paper aims to provide a comprehensive systematic review using bibliometric analysis on the metaverse in health education and analyze the trends and patterns of research output within the field. Design/methodology/approach: The paper conducts bibliometric analysis and follows the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines to ensure a rigorous and transparent review process. Specifically, this article identifies research questions, develops a data-collection strategy and establishes a screening approach that includes determining relevant keywords and applying inclusion and exclusion criteria. Findings: A bibliometric analysis is conducted comprising 231 studies from 145 scientific journals to assess the trends, patterns and collaboration networks in research on the use of metaverse technology in health education. This paper provides insights into the research themes, publication trends and countries leading in this field, which can guide future research in this field. Originality/value: The use of metaverse technology in health education has gained momentum in recent years. Despite this interest, comprehensive studies to review and analyze the existing literature on this topic systematically are lacking. In response, this paper provides a systematic review that explores the potential role of the metaverse in health education. By considering the current research, key trends, research hotspots and opportunities for future investigations are identified. The findings not only shed light on the current state of research but also offer guidance for advancing this exciting field. © 2023, Emerald Publishing Limited
Determination of Antioxidant Activity, Vitamin C Content, GST Enzyme Inhibition and Phenolic Profile by LC-HRMS of Jujube Fruit and Seed
No full textJujube belongs to the Rhamnaceae family and is known as red date or Chinese date. It has widespread uses due to its high nutritional values. In this study, jujube fruit and seeds grown in Sakarya, Turkey, were extracted and their total phenolic and total flavonoid contents were evaluated. The liquid chromatography-high resolution mass spectrometry (LC-HRMS) analyses results showed that 15 different phenolic substances were identified in jujube fruit, while 27 different phenolic substances were detected in jujube seeds. The total phenolic and total flavonoid contents of jujube seed were determined as 127.91 ± 3.05 mg GAE/g extract (ext) and 14.58 ± 5.22 mg catechin/mg ext., respectively. Moreover, the antioxidant and glutathione-s-transferase activity of the extracts were also investigated. The jujube seed had a strong antioxidant effect (IC50 = 81.76 ± 3.56 μg/mL for DPPH; IC50 = 58.99 ± 0.70 μg/mL for ABTS). Furthermore, jujube fruit and seeds showed inhibitory activity against the glutathione-s-transferase enzyme. © The Author(s), under exclusive licence to The author(s), exclusively licensed to Springer-Verlag GmbH Germany, a part of Springer Nature 2024
The Effect of Prolonged Fasting Before Surgery on Pain and Anxiety
No full textPurpose: To investigate the effect of prolonged fasting before surgery on pain and anxiety. Design: This was a descriptive study. Methods: This study was conducted in a plastic, reconstructive, and esthetic surgery clinic at a university hospital in Bursa, Turkey. A data collection tool was designed to collect data on the sociodemographic characteristics. The Beck Anxiety Scale was used to assess patients' anxiety in the preoperative period and the Visual Analog Scale was used to measure pain levels in the postoperative period. The Statistical Package for Social Sciences was used for data analysis. Findings: A total of 363 patients took part in the study. A majority (91.2%) of the patients who participated in the study were aware of why they were fasting before surgery, and 41.6% of them had been informed about preoperative fasting by the nurse. In addition, 60.9% of patients had thirst, 17.6% had headache, 40.5% were hungry, 62% had dry mouth, 79.6% were restless, and 83.7% were anxious. Most (82.6%) of the patients who participated in the study had a preoperative fasting period of more than 6 hours, 58.4% had a postoperative fasting period of 5 hours or less, and the mean fasting period was 6.82 ± 1.76. The mean score of the Visual Comparison Scale was 5.09 ± 0.31 and the mean score of the Beck Anxiety Scale was 21.86 ± 0.054, and patients with a fasting period of 6 hours or more experienced more pain and anxiety. Conclusions: This study shows that patients with longer fasting duration experience more pain and anxiety, and patients with more anxiety experience more pain. Based on the results of this study, it is recommended that studies should be done to emphasize the issue and to increase the awareness of health care professionals about pre- and postoperative fasting. © 2024 The American Society of PeriAnesthesia Nurse