Online ISSN: 2515-8260

Keywords : microorganisms


SYNTHESIS OF COPPER NANOPARTICLES IN PRESENCE OF MICROORGANISMS

Zaynitdinova L.I .; Kukanova S.I .; Juraeva R.N .; Ergashev R.B .; Tashpulatov J.J .

European Journal of Molecular & Clinical Medicine, 2020, Volume 7, Issue 2, Pages 1141-1147

Application of nanoparticles in different industries attracts special attention nowadays. Use of microorganisms is one of the actively studied directions for nanoparticles production. The strain of Pseudomonas stutzeri possessing capacity to bioformation of copper nanoparticles was selected as a result of conducted screening among collection cultures. Earlier this strain revealed activity in terms of biosynthesis of silver nanoparticles too. The possibility to regulate size and form of produced nanoparticles by regulating concentration of ions in the solution was established. The strain is considered as a potential source for development of the technology for production of copper nanoparticles.

BIOGENIC SILVER NANOPARTICLES

Zaynitdinova L.I.; Juraeva R.N.,; Kukanova S.I; Vokhidova N.R.; Tashpulatov J.J; Lobanova I.V.

European Journal of Molecular & Clinical Medicine, 2020, Volume 7, Issue 2, Pages 2186-2193

Capability of different microorganisms to produce nanoparticles of silver (NPAg)
at different pH levels was studied. It was established that pH of the reaction medium
considerably affects form and size of produced nanoparticles. The fact of NPAg formation
produced by the different microorganisms was studied by UV-spectroscopy and AFmicroscopy
methods.It was determined that in the selected conditions of the synthesis both
clusters and nanoparticles of silver are produced ranging in size from 20 to 300 nm and
form absorption bands at max275 nm and 420 nm, respectively. It was revealed that
changeof pH level of the reaction system may result in regulation of the size and form of
the nanoparticles.