Biosynthesis, characterization, and antimicrobial applications of silver nanoparticles.

In the present study, the strain Brevibacterium frigoritolerans DC2 was explored for the efficient and extracellular synthesis of silver nanoparticles. These biosynthesized silver nanoparticles were characterized by ultraviolet-visible spectrophotometry, which detected the formation of silver nanoparticles in the reaction mixture and showed a maximum absorbance at 420 nm. In addition, field emission transmission electron microscopy revealed the spherical shape of the nanoparticles.

Microbacterium panaciterrae sp. nov., isolated from the rhizosphere of ginseng.

Strain DCY56(T) was isolated from a soil sample taken from a ginseng field. The strain was Gram-reaction positive, catalase-positive, oxidase-negative, aerobic and non-motile. Phylogenetic analysis, based on 16S rRNA gene sequence analysis, indicated that strain DCY56(T) belonged to the genus Microbacterium.

Epilithonimonas ginsengisoli sp. nov., isolated from soil of a ginseng field.

A novel Gram-staining-negative, rod-shaped bacterium, designated DCY78(T), was isolated from soil of a ginseng field in Yeon-cheon province (38° 04' 00″ N 126° 57' 00″ E), Republic of Korea. The phylogenetic analysis based on 16S rRNA gene sequences showed that strain DCY78(T) belonged to the genus Epilithonimonas and was most closely related to Epilithonimonas lactis DSM 19921(T) (98.5 % sequence similarity) and Epilithonimonas tenax DSM 16811(T) (97.