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Biofilm Eradication Using Biogenic Silver Nanoparticles

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Biofilm Eradication Using Biogenic Silver Nanoparticles ( biofilm-eradication-using-biogenic-silver-nanoparticles )

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Molecules 2020, 25, 2023 Molecules 2020, 25, x FOR PEER REVIEW Molecules 2020, 25, x FOR PEER REVIEW Figure 7. ESEM images of the interaction between E. coli and PchNPs. (a,b): control, (c–f): E. coli Figure 7. ESEM images of the interaction between E. coli and PchNPs. (a,b): control, (c–f): E. coli Figure 7. ESEM images of the interaction between E. coli and PchNPs. (a,b): control, (c–f): E. coli treated with PchNPs (c,d: 0.12 nM and e,f: 0.25 nM). Membrane puncturing and cell lysis indicated treated with PchNPs (c,d: 0.12 nM and e,f: 0.25 nM). Membrane puncturing and cell lysis indicated by treated with PchNPs (c,d: 0.12 nM and e,f: 0.25 nM). Membrane puncturing and cell lysis indicated 7 of 14 8 of 15 8 of 15 by white arrows. Note that panel e contains bright artifacts from the glutaraldehyde fixation. white arrows. Note that panel e contains bright artifacts from the glutaraldehyde fixation. by white arrows. Note that panel e contains bright artifacts from the glutaraldehyde fixation. Figure 8. TEM images of the interaction between E. coli and PchNPs. (a,b): control, (c–f): E. coli treated Figure 8. TEM images of the interaction between E. coli and PchNPs. (a,b): control, (c–f): E. coli treated Figure 8. TEM images of the interaction between E. coli and PchNPs. (a,b): control, (c–f): E. coli treated with PchNPs (c,d: 0,12 nM and e,f: 0,25 nM). Black arrows indicate cell membrane puncturing. Panel f with PchNPs (c,d: 0,12 nM and e,f: 0,25 nM). Black arrows indicate cell membrane puncturing. Panel with PchNPs (c,d: 0,12 nM and e,f: 0,25 nM). Black arrows indicate cell membrane puncturing. Panel shows a significant amount of debris from cell lysis in addition to the bacterial cells. f shows a significant amount of debris from cell lysis in addition to the bacterial cells. f shows a significant amount of debris from cell lysis in addition to the bacterial cells. Increasing silver nanoparticle concentration to 0,25 nM (Figure 8e,f) resulted in a decrease in the Increasing silver nanoparticle concentration to 0,25 nM (Figure 8e,f) resulted in a decrease in the Increasing silver nanoparticle concentration to 0,25 nM (Figure 8e,f) resulted in a decrease in the integrity of the cell membrane (indicated by black arrows in Figure 8d,f), probably as a consequence integrity of the cell membrane (indicated by black arrows in Figure 8d,f), probably as a consequence integrity of the cell membrane (indicated by black arrows in Figure 8d,f), probably as a consequence of the loss of cytoplasmic components due to degeneration of pores on the cell, as shown in the of the loss of cytoplasmic components due to degeneration of pores on the cell, as shown in the ESEM of the loss of cytoplasmic components due to degeneration of pores on the cell, as shown in the ESEM ESEM images. images. images. 2.6. Antimicrobial Properties of PchNPs Using Confocal Raman Microscopy 2.6. Antimicrobial Properties of PchNPs Using Confocal Raman Microscopy 2.6. Antimicrobial Properties of PchNPs Using Confocal Raman Microscopy Studies of the phenotypic profile of E. coli and C. albicans cells before and after treatment with silver Studies of the phenotypic profile of E. coli and C. albicans cells before and after treatment with nanopStaurtdicielessowfethrecpahrreinedotoyupticuspinrogficloenofofcEa.lcRoalimaanndmCi.carolbsicoapnsy.cIenllosrbdefrotroeeavnadluaftteetrhtereaanttmimeinctrowbitahl silver nanoparticles were carried out using confocal Raman microscopy. In order to evaluate the asciltviveritynaonfoPpcahrNticPlseswweesreelecaterrdietdwouvteruysidnigffecroenftocmailcRroaomrgaannmismicrso(sacopproyk.aInryortidcearntdoaeveaulkuartyeotthice antimicrobial activity of PchNPs we selected two very different microorganisms (a prokaryotic and manictirmooicrgroabniasmla)c.tAivnitiymopfoPrctahnNtPstsruwcetusrealledctieffdertewncoevbertywdeeifnfetrheenmt,mthicartoiosrtghaentiasrmgest(oafpacrtoikoanroyfosteicvearnadl a eukaryotic microorganism). An important structural difference between them, that is the target of anetuimkaicrryobticalms,icisrotohregcaonmismpo)s.iAtinonimopf othrteancetlsltreuncvteulroapled.ifEfe.rceonliceceblelstwheaevnetahecmom, tphlaetxiscetlhleetnavrgeleotpoef action of several antimicrobials, is the composition of the cell envelope. E. coli cells have a complex action of several antimicrobials, is the composition of the cell envelope. E. coli cells have a complex cell envelope composed of the cytoplasmic membrane, the periplasm with a thin peptidoglycan layer, cell envelope composed of the cytoplasmic membrane, the periplasm with a thin peptidoglycan layer,

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