Qian Yang

Multifunctional materials converge various physical and chemical properties, while often being hampered by complicated synthesis procedures and inconsistent performance. A straightforward strategy is presented for synthesizing robust multifunctional plasmonic nanoparticles (NPs), AuAgNPs with edged satellites (ES‐AuAgNPs). The ES‐AuAgNPs possess various characteristics of i) alloyed Ag/Au with a 7:3 ratio, ii) numerous satellited NPs with narrow nanogaps on face‐to‐face edges, and iii) a well‐accessible surface deposited with antimicrobial components. These properties endow ES‐AuAgNPs with improved peroxidase (POD)‐like catalytic, surface‐enhanced Raman scattering (SERS), and antibacterial activities. By utilizing the triple‐performance of ES‐AuAgNPs and a modified specific aptamer probe, a portable, modular, and centimeter‐sized platform is designed for simultaneously screening, validating, and eliminating pandemic marine Vibrio bacteria: parahaemolyticus , vulnificus , and alginolyticus . Wherein, POD‐like catalytic‐based colorimetric capacity can rapidly screen the presence of these bacteria through visible color change, and SERS‐based detection validates bacterial identity with multiplexing capability. Meanwhile, the inherent antibacterial properties of ES‐AuAgNPs ensure the effective elimination of detected bacteria. Remarkable performance is achieved in rapid screening (2 min), sensitive validation (limit of detection, ≈50 CFU per mL), and efficient antimicrobility (45 min, 100%). The ES‐AuAgNPs constructed platform is believed to improve aquaculture management by seamlessly analyzing and eliminating bacteria.

This study established a biological fermentation process using Saccharomyces cerevisiae and Lactobacillus plantarum to deodorize squid cartilage homogenate. The optimal fermentation conditions for S. cerevisiae were determined as follows: fermentation time 105 min, temperature 34 °C, and inoculum size 0.85%. For L. plantarum, the optimum conditions were 79 min, 34.5 °C, and 4.5% inoculum. Based on electronic nose and HS-SPME-GC-MS analyses, S. cerevisiae outperformed L. plantarum in eliminating key offensive odor compounds, especially sulfur-containing compounds and aldehydes, while promoting the formation of pleasant aroma compounds such as esters and ketones (e.g., carvone and δ-pentenol). Mechanistic insights suggest that the enhanced deodorization efficiency of S. cerevisiae may be attributed to its multi-pathway synergistic metabolism, involving enzymes like dioxygenases and sulfide oxidases that facilitate the conversion of malodorous substances into odorless or pleasantly aromatic compounds. These findings provide a valuable theoretical and practical foundation for the high-value utilization of squid processing by-products and propose a promising bio-deodorization strategy for aquatic products.