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Dental zirconia ceramics, widely employed in dentistry for their biocompatibility and mechanical properties, face challenges in long-term viability within the oral cavity. This study focuses on analyzing the electrochemical behavior of a commercial dental zirconia ceramic type in acidic environments. Through extensive electrochemical investigations, including Electrochemical Impedance Spectroscopy (EIS) and cyclic polarization resistance (Cpol), corrosion resistance was assessed. Despite indications of material dissolution, our results demonstrate significant corrosion resistance, as reflected in low corrosion current density (Icorr) values. Notably, the study reveals the development of a protective oxide layer at the ceramic-electrolyte interface, contributing to material stability. XRD analysis confirms the presence of stable crystallographic phases (t-ZrO2) even after exposure to acidic media. Surface characterizations utilizing scanning electron microscopy-energy-dispersive X-ray spectroscopy (SEM-EDX) affirm minimal surface damage and maintained elemental composition. These findings illuminate the intricate electrochemical behavior of dental zirconia ceramics in challenging environments, underscoring their potential for durable dental restorations. This interdisciplinary research bridges dentistry and materials science, providing valuable insights for optimizing material properties and advancing dental materials and restorative techniques. [ABSTRACT FROM AUTHOR]

The aim of this study was to determine the phenolic composition and evaluate the biological properties of Rosa canina L. fruits. Three extraction methods (ultrasonic, maceration, and Soxhlet) were used to prepare the methanolic extracts. LC-MS analysis detected new phenolic compounds including phenolic acids (cinnamic acid, p -coumaric acid, ferulic acid), flavonols (quercetin glucoside, quercetin-glucuronide, quercetin-pentoside, kaempferol-glucoside), and hydrolyzable tannins (digalloylglucose, pyrogallol-2- O -glucuronide). According to Folin-Ciocalteu test, the TPC values were 138.47, 141.10, and 140.49 mg GAE/g extract for ultrasonic, maceration, and Soxhlet method, respectively. This phenolic richness was confirmed by the antioxidant power tests and FRAP assay. The ultrasonic extract presented IC 50 of 30.12 μg/mL for the DPPH test, the Soxhlet extract had a concentration of 264.33 μmol TE/g extract for the ABTS test, and the maceration extract showed a level of 87.26 mg AAE/g extract, according to the FRAP assay. The anti-diabetic activity was determined by an α-amylase inhibition test. Based on this test, R. canina fruits revealed a significant antidiabetic activity (65.28%) for the ultrasonic extract at a concentration of 250 μg/mL. In conclusion, the hips of R. canina could be a natural source of potentially useful bioactive compounds for the treatment of type 2 diabetes and oxidative stress. • Extracts of flowers, fruits, and fruit seeds of Rosa canina were investigated. • HPLC-DAD-ESI/MS analysis revealed a diversity of chemical bioactive compounds of flavonoids and phenolic acids. • The chemical composition of R. canina extracts could be responsible for their antioxidant and antidiabetic activities. • The results suggest that the extracts could have potential therapeutic applications in the management of diabetes and oxidative stress-related diseases. [ABSTRACT FROM AUTHOR]

The urgency of addressing climate change, energy security, and ecological concerns has driven the global shift towards renewable energy systems. In this transformative era, green hydrogen emerges as a pivotal energy resource, promising substantial reductions in global emissions. Methods like water electrolysis, biomass gasification, and methane reforming with carbon capture and storage offer pathways to synthesize hydrogen without greenhouse gas emissions. Currently, hydrogen accounts for approximately 4% of global energy generation, with projections suggesting this could increase to 10% by 2030 and 20% by 2050. Integrating nuclear energy into hydrogen production presents a low-carbon option, promoting reliability and meeting growing demand across sectors. For instance, incorporating nuclear energy could reduce emissions by up to 90% compared to conventional methods. Categorizing hydrogen production into colors based on emissions provides a framework for understanding their environmental and socio-economic profiles. For example, green hydrogen can reduce lifecycle emissions by 60–90% compared to gray hydrogen. Life cycle analysis aids in evaluating overall impacts, guiding policy formulation and industrial decisions towards sustainability. This review examines various production pathways, highlighting their potential contributions to a carbon-neutral economy and discussing the hydrogen spectrum's role in characterizing production processes based on carbon emissions. [Display omitted] • H 2 spectrum characterizes manufacturing processes based on carbon emissions. • Renewable hydrogen reduces emissions more effectively than gray hydrogen. • Nuclear hydrogen has a low impact using Cu–Cl thermochemical cycles. • Multifaceted approaches needed to overcome hydrogen production challenges. [ABSTRACT FROM AUTHOR]