Enhanced adsorption of caprolactam on phenols-modified Amberlite XAD16

Li, Fada; Chen, Bin; Han, Yu; Cao, Yiwen; Hong, Xiaoxue; Xu, Mancai

doi:10.1016/j.reactfunctpolym.2021.104850

Cited by 12 publications

(1 citation statement)

References 45 publications

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“…XAD16 amberlite is a polymeric adsorbent used in the adsorption and pre-purification of organic compounds from aqueous solutions. Although pre-purification of the EFP using XAD amberlite leaves fewer bioavailable molecules than in the original extract, it makes it possible to recognize which compounds are acting on the biological activity analyzed and allows the extract's shelf-life to be extended [35].…”

Section: Antimicrobial Activitymentioning

confidence: 99%

Dual Emerging Applications of Solid-State Fermentation (SSF) with Aspergillus niger and Ultrasonic-Assisted Extraction (UAE) for the Obtention of Antimicrobial Polyphenols from Pineapple Waste

et al. 2023

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The exploration of natural antimicrobial compounds is necessary due to the current bacterial resistance to synthetic antibiotics. For this reason, pineapple residues were evaluated as a natural source of phenolic compounds with antimicrobial capacity. Pineapple residues were fermented with A. niger GH1 and subjected to ultrasound for the extraction of phenolic compounds. In the solid-state fermentation (SSF), the peel and the core (70:30) were fermented for 32 h. Ultrasonic-assisted extraction (UAE) was optimized. The factors solid–liquid ratio (X1), ethanol concentration (X2), and extraction cycle (X3) were optimized through a Box–Behnken statistical design, using the total phenol content (TPC) as a response variable. The optimized and pre-purified extract with amberlite was characterized using HPLC-MS and we measured the antimicrobial activity against Listeria monocytogenes, Staphylococcus aureus, and Escherichia coli. The optimal values for X1, X2, and X3 were 82 mg/mL, 26%, and two cycles, respectively. The extract was effective as an antimicrobial agent against S. aureus and L. monocytogenes, with MICs of 50 mg/mL and 12.5 mg/mL, respectively; the bacterial growth curve and transmission electron microscopy (TEM) confirmed the antimicrobial activity. The main compounds identified in the antimicrobial extract were 3,4-DHPEA-EA, Phloretin 2′-O-xylosyl-glucoside, and Feruloyl tartaric acid. Overall, the combination SSF-UAE showed to be a promising strategy to recover phenolic compounds from pineapple residues, exhibiting great potential as a natural antimicrobial agent.

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Section: Antimicrobial Activitymentioning

confidence: 99%