tailieunhanh - báo cáo khoa học: "Mechanistic aspects of biosynthesis of silver nanoparticles by several Fusarium oxysporum strains"

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành y học dành cho các bạn tham khảo đề tài: Mechanistic aspects of biosynthesis of silver nanoparticles by several Fusarium oxysporum strains | Journal of Nanobiotechnology BioMed Central Research Open Access Mechanistic aspects of biosynthesis of silver nanoparticles by several Fusarium oxysporum strains Nelson Durán 1 2 Priscyla D Marcato11 Oswaldo L Alves13 Gabriel IH De Souza12 and Elisa Esposito12 Address Biological Chemistry Laboratory Instituto de Química Universidade Estadual de Campinas CEP 13084862 Caixa Postal 6154 Campinas . Brazil 2Biological Chemistry and Biotechnology Laboratory Center Environmental Sciences Universidade de Mogi das Cruzes Mogi das Cruzes . Brazil and 3Solid State Chemistry Laboratory Instituto de Química Universidade Estadual de Campinas CEP 13084862 Caixa Postal 6154 Campinas . Brazil Email Nelson Durán - duran@ Priscyla D Marcato - priscyla@ Oswaldo L Alves - oalves@ Gabriel IH De Souza - gabrinacio@ Elisa Esposito - elisa@ Corresponding author lEqual contributors Published 13 July 2005 Received 11 January 2005 Journal of Nanobiotechnology 2005 3 8 doi 1477-3155-3-8 Accepted 13 July 2005 This article is available from http content 3 1 8 2005 Durán et al licensee BioMed Central Ltd. This is an Open Access article distributed under the terms of the Creative Commons Attribution License http licenses by which permits unrestricted use distribution and reproduction in any medium provided the original work is properly cited. Abstract Extracellular production of metal nanoparticles by several strains of the fungus Fusarium oxysporum was carried out. It was found that aqueous silver ions when exposed to several Fusarium oxysporum strains are reduced in solution thereby leading to the formation of silver hydrosol. The silver nanoparticles were in the range of 20-50 nm in dimensions. The reduction of the metal ions occurs by a nitrate-dependent reductase and a shuttle quinone extracellular process. The potentialities of this nanotechnological design based .