Sodium citrate

Geraniol (Shanghai Aladdin Biochemical Technology Co., China), Tween 80 (Shanghai Yuanye Biotechnology Co., Ltd., China), medium chain triglyceride (Shanghai Yuanye Biotechnology Co., Ltd., China), medium chain triglyceride (Shanghai Yuanye Biotechnology Co., Ltd., China), sodium citrate (Shanghai Yuanye Biotechnology Co., Ltd. Ltd., China), sterile TTC solution (0.5%) (Guangdong Huan Kai Biotechnology Co., China), Staphylococcus aureus (GDMCC 112442), Escherichia coli (GDMCC 1.173), Salmonella typhimurium (GDMCC 11442), Listeria monocytogenes (GDMCC 12408) were purchased from Guangdong Microbial Strain Collection Center, China.

Chitosan (deacetylation degree ≥95%, viscosity from 100 to 200 mpa.s.), sodium-hydroxide, chlorosulfonic acid, lithium bromide, glycidyl methacrylate, acetic acid and anhydrous ethanol were obtained from Aladdin (Wuhan, China). N-N dimethylformamide, anhydrous sodium carbonate and glutaraldehyde were purchased from Macklin (Shanghai, China). Dulbecco’s modified Eagle medium (DMEM), penicillin–streptomycin, fetal bovine serum (FBS) and phosphate buffer saline (PBS) were supplied by Gibco (Grand Island, NY, USA). A live/dead cell double-staining kit was obtained from Proteintech (Rosemont, IL, USA), and a cell counting kit-8 was purchased from KeyGen Biotech (Nanjing, China). Enzyme-linked immunosorbent assay kits were obtained from 4A Biotech (Beijing, China). Streptozotocin was obtained from Sigma Aldrich (Burlington, MA, USA). Citric acid was purchased from Solarbio (Beijing, China). Sodium citrate was supplied by YuanYe Biotech (Shanghai, China). A hematoxylin and eosin dying kit was purchased from Beyotime (Shanghai, China), and Masson’s Trichrome dying kit was purchased from Solabio (Beijing, China), dying according to the procedure in the instructions.