Calcium acetate monohydrate

2-Carboxyethylphenylphosphinic acid (CEPPA) was purchased from Carbosynth Limited. Cobalt acetate tetrahydrate and calcium acetate monohydrate were purchased from Sigma-Aldrich. All chemicals were obtained from commercial sources and used without purification.

Common sage (Salvia officinalis) dried leaves were purchased from Lord Nelson (Tarnowo Podgórne, Poland). All reagents used for HA synthesis, i.e., the sodium phosphate dibasic (Na₂HPO₄), calcium acetate monohydrate (Ca(CH₃CO₂)₂·H₂O), ammonium phosphate monobasic and ammonia water (NH₄OH, 25%) as well as sodium alginate (SA), polyvinylpyrrolidone (PVP), poly(ethylene glycol) diacrylate average Mn 700 (PEGDA), gelatin (GE), 2-hydroxy-2-methylpropiophenone 97%, 2,2-Diphenyl-1-picrylhydrazyl (DPPH), triethanolamine ≥ 99.0% (TEA), gallic acid and edetate disodium were obtained from Sigma-Aldrich (Darmstadt, Germany). Urea was purchased from Stanlab (Lublin, Poland) and phosphate buffered saline (PBS) from Oxoid (Basingstoke, UK). The bismuth(III) nitrate pentahydrate (Bi(NO₃)₃), sodium carbonate (Na₂CO₃), potassium chloride (KOH), sodium chloride (NaCl), nitric acid (HNO₃), hydrochloric acid (HCl), ethanol 96%, calcium chloride dihydrate (CaCl₂·2H₂O) and sodium sulfide nonahydrate (Na₂S · 9H₂O) were obtained from Chempur (Piekary Śląskie, Poland).