Dalian Minzu University

The present study successfully devised an innovative pH-sensitive system for encapsulating fucoxanthin, which effectively shielded RAW 264.7 cells from H₂O₂-induced damage.The formulation requires modification of sodium alginate with octanoyl chloride (C8) via esterification to provide amphiphilic self-assembly capacity of the system and loading of fucoxanthin via sonication.The hydration diameter (193.9-167.9 nm) and critical aggregation concentration of the micellar-like aggregates (1.4-0.5 mg/mL) gradually decreased with the increasing degree of substitution (1.54 %-60.20 %).The encapsulation efficiency (46.11 %-88.54 %) and loading capacity (4.61 %-8.85 %) showed a pos. correlation with the increasing degree of substitution.The TEM confirmed complete fucoxanthin encapsulation in micellar-like aggregates, forming smooth-surfaced spherical particles.In vitro simulated digestion assays demonstrated that micellar-like aggregates effectively shielded fucoxanthin from premature gastric release, while significantly improving its release efficiency during the intestinal phase.Fucoxanthin-loaded micellar-like aggregates endocytosed by RAW 264.7 cells alleviated cellular oxidative stress damage by reducing ROS levels.The study demonstrates the potential of self-assembled sodium alginate nanoparticles as a novel carrier for efficient delivery of hydrophobic substances, thereby establishing an innovative formulation for alleviating oxidative stress.

Mainstream approaches to spectral reconstruction primarily focus on Convolution- and Transformer-based architectures. However, CNN methods fall short in handling long-range dependencies, whereas Transformers are constrained by computational efficiency limitations. Therefore, constructing a efficient spectral reconstruction network while ensuring the quality of reconstructed hyperspectral images (HSIs) has become a major challenge. Recent breakthroughs in the state-space model (e.g., Mamba) have attracted significant attention from natural language processing to vision tasks due to its near-linear computational efficiency and superior performance, prompting our investigation into its potential for spectral reconstruction problems. To this end, we introduce the Gradient-integrated Mamba for Spectral Reconstruction from RGB Images, dubbed GMSR-Net. GMSR-Net is a lightweight model characterized by a global receptive field and linear computational complexity. Its core comprises multiple stacked Gradient Mamba (GM) blocks, each featuring a tri-branch structure. Building upon the efficient global feature representation from the Mamba, we further innovatively propose spatial gradient attention and spectral gradient attention to guide the reconstruction of spatial and spectral cues. GMSR-Net demonstrates a significant accuracy-efficiency trade-off, achieving state-of-the-art performance while markedly reducing the number of parameters and computational burdens. Compared to existing approaches, GMSR-Net slashes parameters and FLOPs by substantial margins of 8 times and 20 times, respectively. Code is available at https://github.com/wxy11-27/GMSR.

The hollow MoSe₂/N-doped carbon (NC) composite, which was obtained through Mo-polydopamine as a self-sacrificing template based on the Kirkendall effect, was further utilized to fabricate a novel ternary MoSe₂/NC/ZIS (MNZ) dual Z-scheme heterojunction by growing ZnIn₂S₄ (ZIS) onto it via a hydrothermal process. The optimized MNZ (12MNZ) heterojunction exhibits exceptional performance in photocatalytic degradation of tetracycline hydrochloride (TCH), hydrogen (H₂) evolution, hydrogen peroxide (H₂O₂) production, and carbon dioxide (CO₂) reduction under visible light irradiation. The 12MNZ photocatalyst achieves a significant photodegradation efficiency of TCH reaching 98.2 % in 30 min, and the rate constant k of the 12MNZ photocatalyst, which is 0.139 min^-1, is approximately 9.8 times greater than that of ZIS. The optimal photocatalytic H₂ evolution rate of 10,309 μmol g^-1 h^-1 achieved is 26.9 times greater than that of ZIS, while the superior production rate of H₂O₂ reaches 735.2 μmol L^-1 h^-1. Besides, the 12MNZ composite reveals the CO yield of 78.03 μmol g^-1 h^-1 with high selectivity of 95 %. The presence of a hollow structure and two built-in electric fields within the MNZ dual Z-scheme heterojunction significantly enhances the absorption efficiency of incident light and promotes the efficient migration of photogenerated carriers. The possible photocatalytic mechanism of the MNZ photocatalyst was presented through experimental measurements and density functional theory calculations. This work provides a promising strategy for developing highly efficient hollow dual Z-scheme heterojunction photocatalysts, aimed at enhancing environmental remediation and generating green energy.