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The experiment took the broccoli (Brassica oleracea var. italica) as the research object, 1-methylcyclopropene (1-MCP), mustard essential oil (MEO) and 1-MCP combined MEO (1-MCP+MEO) were used to treat fresh green broccoli. The effects of physiological and biochemical indexes such as sensory quality, relative conductivity, chlorophyll, vitamin C and malondialdehyde (MDA) content on the quality of broccoli were investigated during storage. The result showed that with the increase of storage time, all groups of preservative treatments could effectively maintain the quality of broccoli during storage, among which 1-MCP+MEO treatment had the best storage effect on broccoli, effectively maintained the appearance of broccoli, avoided yellows and mildew, and slowed down the chlorophyll content and vitamin C degradation rate and made the chlorophyll content of broccoli always higher than that of other treatment groups. 1-MCP+MEO inhibited the increase of relative conductivity and MDA content in broccoli. On the 28th day of storage, the relative conductivity and MDA of the combined treatment group were 14.94% and 9.1 µmol/g, respectively, which were 43.1% and 27.6% lower than that of the control group respectively, and there was a significant difference (P<0.05), so that the cell integrity of the broccoli was maintained and the senescence of the broccoli was inhibited. After 28 days of storage, 1-MCP+MEO treatment group could effectively reduce the decrease of total phenol and total flavonoid contents, and combined treatment was 51.9% higher than that of control group, and total flavonoid content was 38.4% higher than that of control group. In addition, the activity of polyphenoloxidase (PPO) and peroxidase (POD) related to enzymatic browning was significantly inhibited, and the activity of PPO and POD were 23.6% and 48.1% lower than that of control group, respectively. Significantly lowered than control group (P<0.05). This study aims to provide a theoretical basis for the development of broccoli preservation technology and a new idea for the research and development of preservatives. [ABSTRACT FROM AUTHOR]

Fucoxanthin is a carotenoid, reddish-brown in color, which is mainly derived from marine organisms such as brown algae and diatoms, and has aroused extensive scientific interest due to its unique chemical structure and abundant biological activities. Studies have shown that fucoxanthin processes significant anti-inflammatory and anti-cancer activities. Its anti-inflammatory mechanisms primarily include inhibiting oxidative stress, regulating inflammatory factors, inducting cell autophagy, and resisting cell apoptosis, etc. The main mechanism of anti-cancer activity includes inducing cell autophagy and apoptosis mechanisms, regulating the cell cycle, inhibiting cell migration, and suppressing cell invasion, among other aspects. In this paper, the research progress of anti-inflammatory and anti-cancer activities and related mechanisms of action of fucoxanthin is briefly summarized, which provides the theoretical basis and reference for further research and development of fucoxanthin. [ABSTRACT FROM AUTHOR]

ε-Polylysine/polyaspartic hydrogel loaded with different polyphenols was prepared by ion gelation method, and structure characterization and performance analysis of complex hydrogel was investigated. The embedding ratio of ε-polyly-sine/polyaspartic ammonia hydrogel for tannic acid, kaempferol, brown algae polyphenols and three mixed polyphenols were all above 80%. The hydrogel loaded with tannic acid has the largest particle size (2 160.33 nm), the thermal denat-uration temperature and enthalpy value of composite hydrogels without polyphenols was 137.16 °C and 63.67 J/g, respectively, the thermal denaturation temperature and enthalpy values of the composite hydrogels loaded with tannic acid increased to 138.45 °C and 86.53 J/g, respectively, while the thermal denaturing temperature of the hydrogels loaded with kaempferol and brown algae polyphenol decreased to 134.54 °C and 135.32 °C, respectively, and the enthalpy decreased to 53.75 J/g and 59.88 J/g, respectively. Indicating that the compound hydrogel was more suitable for embedding water-soluble tannic acid, and the embedding efficiency of the composite gel to kahanol and other hydrophobic polyphenols was enhanced by the addition of tannic acid. Therefore, polyphenols were coated in ε-polylysine/polyaspartic acid hydrogel with an amorphous structure, and the embedding effect of the these polyphenols was as follow: tannin > tannin / three mixed polyphenols of acid > brown algae polyphenols > kaempferol. [ABSTRACT FROM AUTHOR]