Unraveling electronic structure modulation mechanism in cobalt spinel Fenton-like catalysis by integrating density functional theory and machine learning.

Flammulina velutipes is the most widely consumed edible mushroom in Korea, with a unique flavor and texture that support its popularity domestically and internationally. Korea produces approximately 26,000 tons of F. velutipes annually, accounting for 17% of its total mushroom production and generating export revenues of about 126 million USD. However, recent detection of Listeria monocytogenes in F. velutipes has led to product recalls and import restrictions in major markets, including the United States, thereby threatening export competitiveness. L. monocytogenes is a psychrotrophic foodborne pathogen capable of surviving and proliferating at low temperatures, causing severe diseases such as meningitis and sepsis in immunocompromised individuals, and miscarriage or fetal death in pregnant women. This study evaluated the antibacterial efficacy of peracetic acid (PAA) among several disinfectants for controlling Listeria contamination. Treatment with 80 ppm PAA once daily or once every two days effectively inhibited Listeria growth on F. velutipes surfaces without affecting mushroom fresh weight or marketability. Furthermore, PAA treatment suppressed not only Listeria but also other pathogenic microorganisms, suggesting improved overall microbial safety. PAA decomposes into water and oxygen, producing no harmful residues, and is approved for organic food production. Its ease of field application further enhances practicality. These findings indicate that PAA is an effective, eco-friendly method for controlling L. monocytogenes contamination in F. velutipes, and its implementation could strengthen the microbiological safety and export stability of Korean mushrooms in global markets.

The antimicrobial alternative precursor-derived peracetic acid and zinc oxide lead to a sex dependent microbial modulation in weaning piglets.

Biofilms of Klebsiella pneumoniae are tolerant to disinfection by peracetic acid under conditions relevant for endoscope reprocessing.

Selective elimination of aniline contaminants induced by semiquinone radicals during peracetic acid oxidation of dihydroxybenzenes.

Electron transfer-driven polymerization of phenolics via CuO-catalyzed peracetic acid for sustainable wastewater remediation.

Regulating the covalency of Co-O bond by Fe incorporation achieves efficient peracetic acid activation for durable water purification.

Survival of Escherichia coli O157:H7, Listeria monocytogenes and Salmonella enterica on work-in-process (WIP) fresh-cut red cabbage.

Efficacy of cleaning of unbrushable endoscope channels in automated endoscope reprocessors: evidence of non-compliance in real-world practice.

Establishment of safety criterion and scale-up for ε-caprolactone synthesis via peracetic acid in semi-batch reactors: A kinetics-free method

Open the door to the new world of singlet oxygen in the peracetic acid system: Generation and identification.

Virus-induced redox cycling in Fe(II)/peracetic acid systems: dual roles as reactant and catalytic promoter.

Effects of bromide on peracetic acid degradation of sulfonamide antibiotics

Mechanochemically ball-milled activated carbon supported micro-zero-valent iron composite for peracetic acid activation in tetracycline hydrochloride degradation: Performance, mechanism and applicability

Comparative study of holo-cellulose nanofibers for citral-encapsulated Pickering emulsions: Structure-property relationships and antibacterial performance.

Effective abatement of tetracycline in water by activation of peracetic acid by the copper oxide loaded on straw-derived biochar via the enhanced copper redox cycling

Abstract Background Advanced oxidation processes are considered one of the most promising techniques for removing persistent organic pollutants in water. To achieve efficient degradation of sulfonamides (SAs), cobalt sulfide (CoS) was synthesized and used as a catalyst for the activation of peracetic acid (PAA) to build a new advanced oxidation system (CoS/PAA). Results The reaction conditions of catalyst dosage, PAA concentration, initial pH and substrate concentration were systematically investigated using sulfamethoxazole (SMX) as a model pollutant. At the optimized conditions (80 mg L −1 CoS and 0.5 mmol L −1 PAA), four SAs (sulfisoxazole, sulfadiazine, sulfadimethoxine and SMX, each at 5 mg L −1 ) could be completely degraded within 2–10 min. This CoS/PAA system could withstand interference from inorganic anions of Cl − and H 2 PO 4 − , and the leaching of cobalt ions in treated water was well below the environmental quality standards of 1 mg L −1 in China. The quenching experiment revealed that organic free radicals (RO • ) played a key role in the degradation process. Moreover, a removal rate of 95.03% for SAs in complex pond water was achieved. Conclusion The CoS/PAA system showed promising application prospects in the SA‐containing wastewater treatment. © 2025 Society of Chemical Industry (SCI).

Peracetic acid (PAA) is extensively used in poultry processing, but its bactericidal mechanism remains poorly understood. Reactive oxygen species (ROS) are linked to bacterial cell death by many bactericidal agents. This study investigated the role of ROS in PAA against Salmonella Typhimurium 14028 using bacterial suspensions treated with PAA alone (20 ppm), PAA combined with 2,2'-dipyridyl (Dip; iron chelator) or with thiourea (ROS scavenger) followed by incubation at 37°C for 1 h. Post-incubation, serial dilutions were plated on Luria-Bertani agar to determine colony-forming units per milliliter. Additionally, eight single-deletion mutants and the wild-type (control) of Salmonella Typhimurium 14028 were tested for survivability after exposure to PAA (treatment; 20 ppm) and hydrogen peroxide (H2O2; control). The mutants were categorized by predicted ROS impact: increase in ROS production (atpC, gnd, nuoG, pta, sdhC, and zwf) and no change in ROS production (negative control; edd and pykA). Finally, rifampicin-based selection assay was utilized to evaluate the mutation rate of the wild-type strain in the presence of PAA (60 ppm), H2O2 (control), and PAA + thiourea. Treatment with 20 ppm PAA significantly (p < 0.05) reduced the viability of Salmonella Typhimurium 14028 by a log10 reduction of 0.34, while co-treatment with thiourea restored counts to control level. The survival of the mutants predicted to increase ROS production was significantly reduced compared with the control mutants and wild-type strain (p < 0.05). Exposure to sublethal PAA led to a 28-fold increase in mutation rate suggesting the production of ROS by PAA was responsible for the observed increase. ROS production is a significant component of PAA's bactericidal activity against Salmonella Typhimurium, and increasing ROS production might be exploited to enhance PAA-mediated killing of Salmonella Typhimurium. ROS production by PAA can lead to the development of antibiotic resistance in Salmonella Typhimurium when cells manage to escape cell death.

Numerous commercial products are used in poultry farms to maintain water quality and prevent pathogen dispersion, but their actual impact on broiler chicks’ performance and gut health remains underreported. This study aimed to investigate the effects of three commercial poultry water disinfectants on broiler chicks’ performance and the physicochemical characteristics of gastrointestinal content when continuously added to drinking water. A total of 144 one-day-old Ross® 308 broiler chicks were randomly allocated into four treatment groups: Group A (negative control), Group B (0.01–0.025% v/v Product A [H2O2 + silver complex]), Group C (0.01–0.04% v/v Product B [H2O2 + peracetic acid]), and Group D (0.05–0.1% w/v Product C [peroxides]). Body weight (BW) was measured weekly, while average daily weight gain (ADWG), average daily feed intake (ADFI), and feed conversion ratio (FCR) were calculated for different time periods. Additionally, on days 15 and 40, the pH of the crop, gizzard, duodenum, jejunum, and cecum contents was assessed, while the viscosity of jejunal and ileal contents were also measured. Statistical analysis revealed that all water disinfectants significantly (p ≤ 0.05) reduced BW, ADWG, and ADFI during the early growth phase, followed by either recovery or stabilization in the later stages. Drinking water disinfectants induced significant changes in intestinal physicochemical parameters, including reductions in pH of the content in the jejunum (p ≤ 0.05) during early growth and increased gizzard pH (p ≤ 0.05) and digesta viscosity (p ≤ 0.05) at later ages. These findings suggest that continuous water disinfection can suppress broiler chicks’ performance during the early stages of growth while significantly altering the physicochemical characteristics of gastrointestinal content. Further research is needed to investigate the mechanism that underlaying these results and optimize dosage schemes that balance pathogen control with the health, welfare, and performance of broilers.

Biofouling presents significant challenges to the crop production industry, notably reducing irrigation efficiency and potentially dispersing pathogens to irrigated crops. This study evaluated the efficacy of peracetic acid (PAA) and chlorine (Cl) against Salmonella biofilms in irrigation lines with or without fertilizers. Pond water (PW) with 2-4-1 fish emulsion (O), PW with 4-0-8 synthetic liquid fertilizer (S), or PW with no fertilizer (NoFert) was inoculated with 2 log CFU/mL of a rifampicin-resistant Salmonella cocktail. Inoculated water was then circulated through polyethylene loop irrigation system for a month. Salmonella populations both in the water and attached to the tubing were determined. Data showed that a single point of contamination from the water resulted in a biofilm formation with O and NoFert, but not the S treatments, after 3 days. Both PAA and Cl effectively reduced Salmonella populations for all fertilizer treatments in water samples. However, when no sanitizer was introduced to the line, bacterial dispersion resulted in the contamination of a subsequent irrigation event for the O treatments but not the S and NoFert treatments, which presented no microbial proliferation. Our findings suggest that O treatments resulted in persistent biofilm formation that could lead to contamination of irrigation water when no sanitizers are introduced. These studies provide insight into the behavior of foodborne pathogens in irrigation distribution systems.IMPORTANCEThe accumulation of bacteria in water distribution systems due to biofouling can lead to contamination, making it crucial to evaluate and implement effective mitigation measures to prevent these issues and ensure safe and efficient irrigation practices. The use of the 2-4-1 fish emulsion in-line may support the establishment of Salmonella biofilms and subsequent cross-contamination of irrigation water if not fully flushed from the system. This study demonstrates that PAA and Cl effectively reduce Salmonella contamination in water but will not eliminate populations in-line once biofilms are established.