MARIA ANDRIEȘ*, EMIL PUȘCAȘU*, CLAUDIA NĂDEJDE*, LĂCRĂMIOARA OPRICĂ**, DORINA CREANGĂ*#
*Faculty of Physics, ”Alexandru Ioan Cuza” University, Iași, Romania
**Faculty of Biology, ”Alexandru Ioan Cuza” University, Iași, Romania
Experimental study was carried out to study simulated magnetic contamination influence on cellulolytic fungi with important role in wood waste decomposing. Cobalt ferrite nanopowder was precipitated from divalent cobalt salts and trivalent iron compounds in alkali reaction medium. Perchloric acid was used to get surface modification of fabricated magnetic nanoparticles with the aim of suspending them in water for environmental application study. Rheological properties were analyzed by standard methods considering further administration of the suspension in the agarized culture medium of fungi cells. Cellulolytic fungus Phanerochaete chrysosporium was grown in the presence of magnetic nanoparticle concentrations from 15 to 35 mg/L. Malonaldehyde (MDA) level in the fungus mycelium was estimated by standard biochemical method lipid peroxide assay. In seven days old cultures, non-significant changes in MDA level were found while in fourteen days old mycelium an evident increase was recorded in samples supplied with magnetic nanoparticles. Possible issue related to magnetic contamination stress exerted upon environmental fungi involved in wood waste could be formulated.
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