Precision management for rare ampullary cancer: New evidence refines postoperative chemotherapy strategy
Peer-Reviewed Publication
Updates every hour. Last Updated: 26-Dec-2025 20:11 ET (27-Dec-2025 01:11 GMT/UTC)
A new study published in Frontiers of Engineering Management presents a comprehensive evaluation system to assess innovation vitality in enterprises. The study utilizes exploratory factor analysis (EFA) to create a robust framework for evaluating the key dimensions of innovation—persistence, volatility, and growth. This system is designed to help enterprises, especially in the advanced materials manufacturing sector, enhance their innovation capabilities.
Professor Xiaokong Liu's team at Jilin University proposed an "activation-quenching" strategy for dynamic covalent chemistry, achieving precise and controllable "on-off" switching of dynamic bond exchange reactions in dynamic covalent polymers (covalent adaptive networks or CANs). This strategy enables the polymer network to reversibly switch between a remodelable dynamic state and a highly stable thermosetting state on demand, effectively balancing the material's remodeling processability and thermal stability, and providing a novel approach to resolving the contradiction between sustainability and stability in dynamic covalent polymers. The article was published as an open access research article in CCS Chemistry, the flagship journal of the Chinese Chemical Society.
This review presents a comprehensive analysis of the electromagnetic shielding mechanisms, advanced synthesis techniques, and material optimization strategies for ceramic-based electromagnetic shielding materials. Meanwhile, this review discusses the research progress of traditional ceramics (such as oxides, carbides, borides, nitrides and ferrites) and emerging ceramics (such as polymer-derived ceramics, MAX phase ceramics and high-entropy ceramics). Furthermore, the review outlines future research directions in four key areas: microstructure engineering for high-efficiency electromagnetic shielding ceramics, advanced manufacturing technologies, multifunctional integration of shielding properties, and the development of artificial intelligence-driven design approaches for ceramic materials.
Ruddlesden-Popper (R-P) layered perovskite Sr3Fe2O7–δ (SFO) is considered a promising cathode catalyst for solid oxide fuel cells (SOFCs) due to its unique layered structure. However, its insufficient oxygen reduction reaction (ORR) activity at reduced temperatures leads to high polarization resistance, significantly degrading cell performance. This study introduces Nd-doped Sr2.9Nd0.1Fe2O7–δ (SNFO) as a candidate cathode material, focusing on its phase structure, oxygen desorption behavior, catalytic activity, and oxygen reduction reaction kinetics. At 700 ℃, the SNFO catalyst delivers outstanding ORR activity with a polarization resistance of 0.20 Ω cm2 and a peak power density of 803 mW cm⁻2. Distribution of relaxation times (DRT) analysis reveals that the ORR kinetics of the SNFO cathode are primarily limited by the oxygen adsorption-dissociation process. In addition, Density functional theory (DFT) calculations demonstrate that SNFO exhibits lower oxygen vacancy formation energy, enhanced O2 adsorption capacity, and optimized overall oxygen dissociation energetics. This study identifies SNFO as a promising cathode electrocatalyst for SOFCs.