Biogenic Synthesis of Copper and Silver Nanoparticles Using Green Alga Botryococcus braunii and Its Antimicrobial Activity

Table 1

Antibacterial and antifungal activity of biogenically synthesized copper and silver nanoparticles.

Nanoparticles (500 µg/ml)	Zone of inhibition diameter (mm)
	Gram-negative bacterial strains		Gram-positive bacterial strains		Fungal strain
	Pseudomonas aeruginosa	Escherichia coli	Klebsiella pneumoniae	Staphylococcus aureus	Fusarium oxysporum
Copper	17 ± 1.56	18 ± 0.1	19 ± 0.0	22 ± 0.88	12 ± 0.58
Silver	20 ± 1.78	20 ± 0.8	21 ± 0.60	22 ± 0.75	16 ± 1.5
All values are mean ± SD
Minimum inhibitory concentration (µg/ml)
Copper	100	250	100	250	250
Silver	62.5	100	62.5	200	250
Ampicillin	—	100	100	250	—
Chloramphenicol	50	50	50	50	—
Nystatin	—	—	—	—	100
Griseofulvin	—	—	—	—	500