Papers by Francesca Parati
International Biodeterioration & Biodegradation, 2011
Water, Air, & Soil Pollution, 1995
The transformation of MeHg under anaerobic conditions in axenic cultures ofDesulfovibrio desulfur... more The transformation of MeHg under anaerobic conditions in axenic cultures ofDesulfovibrio desulfuricans strain LS is compared to that in anoxic marine sediments contaminated by Hg of industrial origin. MeHg was added to cultures ofD. desulfuricans strain LS and incubated at 28°C for two weeks. Significant amounts of dimethylmercury and metacinnabar were produced. These two Hg compounds were formed from the slow decomposition of the intermediate dimethylmercury-sulfide. Other collateral compounds, such as methane and ionic Hg, were also detected during the MeHg degradation process. On the other hand a sample of fresh sediment (1.5 g d.w.) was spiked with 10 µg of MeHg and 2 mmoles.ml-1 of pyruvate, as carbon source for sulfate-reducing bacteria. After 9 days of incubation at 28°C, significant amounts of dimethylmercury were produced. A lower content of this volatile species was found in a subsample of sediment supplemented with sodium molybdate, which is a strong inhibitor of sulfatereducing activity. A kinetic study showed the disappearance of monomethylmercury from the sediment and the formation of dimethylmercury over the incubation period. The environmental significance of dimethylmercury and dimethylmercury-sulfide in the natural biogeochemical cycle of Hg is discussed.
International …, 2009
... Total counts of heterotrophic microorganisms and actinomycetes were made using Triptic Soy Ag... more ... Total counts of heterotrophic microorganisms and actinomycetes were made using Triptic Soy Agar (TSA) (Difco) and Actinomycete Isolation ... Waste wool, , , 2.4, 3.0. ... In general, low differences were observed in the composition of fruit bodies grown on ES and control substrates ...
International Biodeterioration & Biodegradation, 2011
The production of a substrate containing destoned olive mill solid waste for the cultivation of A... more The production of a substrate containing destoned olive mill solid waste for the cultivation of Agaricus bisporus (Lange) Imbach on an industrial scale was studied. A standard mushroom compost (C) mainly made from straw and poultry manure was compared with the experimental compost (EC) containing the same ingredients as (C) but with added olive mill solid waste (10.6% w/w). Microbial indicators such as counts of heterotrophic microbes and actinomycetes were higher in EC than in C. In addition, compost selectivity as indicated by higher mushroom yield and biological efficiency of EC was higher than that of C. Market quality of the mushrooms produced in both C and EC were comparable. These findings support our work that olive mill solid waste can be used safely in thermal composting process to produce a selective substrate for industrial-scale cultivation of A. bisporus. This study also demonstrates an environmentally sustainable system to manage solid waste from olive oil extraction processes thus overcoming environmental pollution brought about by irrational disposal of the waste on farm lands.
International Biodeterioration & Biodegradation, 2009
... Total counts of heterotrophic microorganisms and actinomycetes were made using Triptic Soy Ag... more ... Total counts of heterotrophic microorganisms and actinomycetes were made using Triptic Soy Agar (TSA) (Difco) and Actinomycete Isolation ... Waste wool, , , 2.4, 3.0. ... In general, low differences were observed in the composition of fruit bodies grown on ES and control substrates ...
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Papers by Francesca Parati