Journal: International Journal of Molecular Sciences
Article Title: Green Synthesis of Silver Nanoparticles with Antibacterial, Anti-Inflammatory, and Antioxidant Activity Using Convolvulus arvensis
doi: 10.3390/ijms27031210
Figure Lengend Snippet: Scanning Electron Microscopy (SEM) images showing the morphological effects of silver nanoparticles synthesized from C. arvensis. ( A – C ) demonstrate the effect on Gram-positive S. aureus (MRSA and ST), E-H demonstrate the effect on Gram-negative E. coli ESBL and ST) bacterial strains. described above, and the cells exhibited a division-related septum, broadening, and cytoplasm leakage. Scanning electron microscope images showed that the untreated control groups ( A , C , E , G ), bacterial cells exhibited normal morphology with intact cell walls and smooth surfaces. In contrast, treated cells ( B , D , F , H ) showed significant morphological changes: S. aureus cells displayed shrinkage and deformations in their spherical shape, while E. coli cells exhibited marked structural disintegration and severe membrane damage. These observations confirm the destructive effects of silver nanoparticles on bacterial cell integrity. Most of the cells were damaged and perforated, which changed the cell structure and shape, and it was noted that some of them were empty. In addition, most cells appeared to stick together compared to untreated cells. As is clear in .
Article Snippet: Four bacterial strains were used in this study: one standard Gram-positive strain ( Staphylococcus aureus ATCC 29213 ), one standard Gram-negative strain ( Escherichia coli ATCC 25922 ), and two clinical isolates (SP1 and SP2) obtained from patient samples.
Techniques: Electron Microscopy, Synthesized, Microscopy, Control, Membrane