Glacial acetic acid

Human hair was purchased from local barber shops in Chongqing, China. Porcine gastric mucin (PGM) was purchased from Sigma-Aldrich. (UK). N-ethylmaleimide (NEM) was purchased from Macklin Biochemical Co. Ltd. (Shanghai, China). Urea, Tween 20, Thioglycolic acid (TGA) and glacial acetic acid were purchased from Kelong Chemical Reagent Co. Ltd. (Chengdu, China). Amoxicillin sodium (AMO) was supplied by the Tuochukangyuan Pharm & Chem Co., Ltd. (Hubei, China). All other materials and reagents used in this study were analytical grade.

Bismuth nitrate (Bi(NO₃)₃·5H₂O, Analytical Reagent, AR, ≥99.0%), sodium tungstate (Na₂WO₄·2H₂O, AR, ≥99.5%), anhydrous ethanol (C₂H₅OH, AR, ≥99.7%), glacial acetic acid (C₂H₄O₂, AR, ≥99.5%), and tin tetrachloride (SnCl₄·5H₂O, AR, ≥99.0%) were purchased from Chengdu Kelong Chemical Co., Ltd., Chengdu, China.

The LYS, LZD, AMK, CRO/SBT, CTX/SBT, PIP/SBT, DOX, LVX, AK71, IPM, and AZM were supplied by Xiangbei Welman Pharmaceutical Co., Ltd (Hunan, China). The dimethyl sulfoxide (DMSO), methanol, glacial acetic acid, and glycerol were purchased from Chengdu Chron Chemicals Co., Ltd (Sichuan, China). The crystal violet and MTT thiazolyl were, respectively, offered by Guangdong Guanghua Technology Co., Ltd (Guangdong, China) and Adamas Reagent, Ltd (Shanghai, China). The cation-adjusted Mueller-Hinton broth (CAMHB) and fluorescein isothiocyanate-dextran (FD, MW = 40 kDa), respectively, were purchased from Qingdao Haibo Biological Technology Co., Ltd (Shandong, China) and Sigma-Aldrich Trading Co., Ltd (Shanghai, China).