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. 2022 Dec 24;8(12):e12567. doi: 10.1016/j.heliyon.2022.e12567

Table 4.

DESs toxicity results using diffusion methods.

Entry DES components Organisms used for toxicity assay Main results Ref
1 MTPB:gly
MTPB:EG
MTPB:TEG
Gram(-): Escherichia coli and Pseudomonas aeruginosa.
Gram(+): Artemia salina, Bacillus subtilis, Stapylococcus aureus,
DES toxicity > components.
DES showed anti-bacterial activity
[98]
2 ChCl with U, OA, Xyl and Sor
B with Glc, MA: PRO, MA:Glc,
CA with PRO, Glc:gly,
Gram(-): Escherichia coli, Proteus mirabilis, Salmonella typhimurium and Pseudomonas aeruginosa
Gram(+): Staphylococcus aureus
Candida albicans
No inhibition of bacteria with ChCl:Xyl, ChCl:Sor and B:Glc
ChCl:U was effective only against E. coli
C. albicans was only inhibited by ChCl:OA
[99]
3 CpA:LaA
CpA:MyA
CpA:SA
Gram(-): Pseudomonas aeruginosa and Escherichia coli
Gram(+): Staphylococcus aureus, Staphylococcus epidermis,
Candida albicans
No inhibition against Gram-negative
Misleading results for Gram-positive bacteria and yeast due to the diffusion ability of the compounds and incubation temperature
CpA:LA promoted biofilm detachment/removal in all microorganisms
[101]
4 ChCl with amines, alcohols, sugars, and organic acids Gram(+): Staphylococcus aureus and Listeria monocytogenes
Gram-(-) Escherichia coli and Salmonella enteritidis
Toxicity of DESs containing organic acids: ChCl:A ˃ChCl:Levulinic acid(LeA) ˃ChCl:CA ˃ChCl:MA ˃ChCl: Malic acid (MaA)˃ChCl: tartaric acid (TA) ˃ChCl/p-toluenesulfonic acid (PTSA). [102]
5 BC:AcA
BC:McA
Polymer BC:AcA and BC:McA
Gram(+): Staphylococcus aureus
Gram-(-) Escherichia coli
Candida albicans
Toxicity of monomeric DESs higher than polymeric
AcA > BC:AcA > BC:McA > BC > McA for S. Aureus and C. Albicans
Similar toxicity for E. coli
[104]
6 Menthol:BA
Menthol:PhA
Gram-(-) Escherichia coli
Gram(+): Staphylococcus aureus and Bacillus subtilis
Similar MIC values for THEDESs. [105]
7 ChCl with gly, U, EG
EAC with gly, U, EG, ZnCl2 and MA
Aspergillus niger
Cyprinus carpio fish
MIC values EAC:ZnCl2<EAC:MA < ChCl:U
<ChCl: EG < EACgly < ChCl:gly
Dose-dependent results on Agar diffusion
Same trend for fish toxicity
[68]
8 ChCl with gly, EG, DEG, TEG, Frc, Glc, MA, PTSA, ZnCl2 and U Phanerochaete chrysosporium, Aspergillus niger, Lentinus tigrinus, Candida cylindracea
Cyprinus carpio fish
ChCl with U, gly, Frc, and Glc showed no inhibition to all fungi
Highest values of inhibition were found for C. cylindracea
Only ChCl:ZnCl2 was toxic for fish
[109]