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Marine Microbe as Nano-factories for Copper Biomineralization
Harneet Kaur,Kunzes Dolma,Navjot Kaur,Ankit Malhotra,Navinder Kumar,Pooja Dixit,Deepak Sharma,S. Mayilraj,Anirban Roy Choudhury 한국생물공학회 2015 Biotechnology and Bioprocess Engineering Vol.20 No.1
The present research work highlighted thepossibility of exploiting marine microbes for the biosynthesisof copper nanoparticles and further investigated thermodynamicchanges during the biomineralization of copper ina microbial system by isothermal titration calorimetry. Abacterial strain (M-7) isolated from Kanyakumari coast,India was found capable of synthesizing these nanoparticles. Based on phylogenetic relationship, the strain M-7 wasidentified as Kocuria flava. The nanoparticles producedwere characterized using UV-vis spectrophotometry, Transmissionelectron microscopy (TEM) and Dynamic lightscattering (DLS). Data revealed the formation of sphericaland quasi-spherical shaped nanoparticles with an averageparticle size ranging between 5 and 30 nm. Additionally, astudy on the effect of different media components indicatedthat media containing higher amount of casein enzymichydrolysate and yeast extract supported the formationof stable colloidal suspension of nanoparticles. Finally,isothermal titration calorimetry (ITC) was carried out tounderstand the change in heat energy during the formationof nanoparticles in different media. Combinatorial observationsof all these studies may open up new strategies todevelop tailor made copper nanoparticles via green route.