| removal of pcbs by various white rot fungi in liquid cultures. | the ability of phanerochaete chrysosporium, trametes versicolor, coriolopsis polyzona, and pleurotus ostreatus growing in a mitogen-limited mineral medium (nmm) to degrade pcbs in a commercial, delor 106 mixture at a concentration of 0.9 ppm was compared. the respective amount of pcbs removed from the fungal cultures within 3 weeks were 25, 50, 41 and 0%. the capacities of the individual fungal species to remove pcbs correlated to some extent with their capabilities of decolorization of nmm agar ... | 1997 | 9340310 |
| olive oil mill wastewater purification by combination of coagulation- flocculation and biological treatments. | in order to define an efficient pre-treatment of olive oil mill wastewater (oomw) to overcome major obstacles to biological treatment, various organic and mineral coagulants have been tested. in particular, the application of quicklime until a ph around 12 - 12.4 was reached, allowed the reduction of almost 37% of the initial cod, and approximately 88% and 71% of the colour and phenolic content of the waste. hence, further biological treatments with an adapted aerobic consortium (ac) and a white ... | 2005 | 16035656 |
| lignin modifying enzymes of coriolopsis polyzona and their role in olive oil mill wastewaters decolourisation. | in order to decolourise olive oil mill wastewaters (oomw) efficiently, production and differential induction of ligninolytic enzymes by the white rot coriolopsis polyzona, were studied by varying growth media composition and/or inducer addition. among various possible inducers, veratryl alcohol appeared to be the most efficient to enhance specific productions of lignin peroxidase (lip), manganese peroxidase (mnp) and laccase by a factor of 18.5, 20.8 and 55, respectively. ligninolytic enzymes we ... | 2006 | 16038961 |
| elimination of endocrine disrupting chemicals nonylphenol and bisphenol a and personal care product ingredient triclosan using enzyme preparation from the white rot fungus coriolopsis polyzona. | the biocatalytic elimination of the endocrine disrupting chemicals (edc) nonylphenol (np) and bisphenol a (bpa) and the personal care product ingredient triclosan (tcs) by the enzyme preparation from the white rot fungus coriolopsis polyzona was investigated. analysis of variance methodology showed that the ph and the temperature are statistically significant factors in the removal of np, bpa and tcs. the elimination of np and tcs was best at a temperature of 50 degrees c and the disappearance o ... | 2007 | 17140622 |
| coupling occurs before breakdown during biotransformation of acid blue 62 by white rot fungi. | only few data exist on the metabolites produced during the biotransformation of anthraquinonic dyes by white rot fungi (wrf). during the biotransformation of an anthraquinonic dye acid blue 62 (abu62) using pycnoporus sanguineus mucl 41582 strain, it was previously demonstrated that the blue colour of the medium turned to red before complete dye decolourisation. to better understand the phenomenon, this study carried out abu62 biotransformation with five different wrf strains (coriolopsis polyzo ... | 2008 | 17825354 |
| preparation and characterization of cross-linked laccase aggregates and their application to the elimination of endocrine disrupting chemicals. | laccase from the white rot fungus coriolopsis polyzona was immobilized for the first time through the formation of cross-linked enzyme aggregates (cleas). laccase cleas were produced by using 1000g of polyethylene glycol per liter of enzyme solution as precipitant and 200mum of glutaraldehyde as a cross-linking agent. these cleas had a laccase activity of 148ug(-1) and an activity recovery of 60.2% when using 2,2'-azino-bis-(3-ethylbenzthiazoline-6-sulfonic acid) (abts) as substrate. cleas forme ... | 2007 | 17884220 |
| effect of growth substrate, method of fermentation, and nitrogen source on lignocellulose-degrading enzymes production by white-rot basidiomycetes. | the exploration of seven physiologically different white rot fungi potential to produce cellulase, xylanase, laccase, and manganese peroxidase (mnp) showed that the enzyme yield and their ratio in enzyme preparations significantly depends on the fungus species, lignocellulosic growth substrate, and cultivation method. the fruit residues were appropriate growth substrates for the production of hydrolytic enzymes and laccase. the highest endoglucanase (111 u ml(-1)) and xylanase (135 u ml(-1)) act ... | 2008 | 18716810 |
| immobilization of laccase from the white rot fungus coriolopsis polyzona and use of the immobilized biocatalyst for the continuous elimination of endocrine disrupting chemicals. | laccase from the white rot fungus strain coriolopsis polyzona was immobilized covalently on the diatomaceous earth support celite r-633 using different strategies. a first methodology involved the sequential activation of the support surface with gamma-aminopropyltriethoxysilane followed by the reaction of the functionalized surface with glutaraldehyde (glu) or glyoxal (gly) and the immobilization of laccase on the activated surface. another strategy tested the simultaneous internal cross-linkin ... | 2009 | 19329308 |
| laccase-modified silica nanoparticles efficiently catalyze the transformation of phenolic compounds. | a new system based on laccase-modified silica nanoparticles has been developed and tested for its ability to degrade a major endocrine disrupting chemical, 4,4'-isopropylidenediphenol (bisphenol a). the nanoparticles have been produced using the stöber method and characterized using scanning electron microscopy, dynamic light scattering and zeta-potential measurements. the introduction of primary amino groups at the surface of these particles has been achieved using an organo-silane (amino-propy ... | 2010 | 20621807 |
| laccase-based cleas: chitosan as a novel cross-linking agent. | laccase from coriolopsis polyzona was insolubilized as cross-linked enzyme aggregates (cleas) for the first time with chitosan as the cross-linking agent. concentrations between 0.01 and 1.867?g/l of chitosan were used and between 0.05 and 600?mm of 1-ethyl-3-(3-dimethylaminopropyl)carbodiimide hydrochloride. the laccase was precipitated using ammonium sulphate and cross-linked simultaneously. specific activity and thermal stability of these biocatalysts were measured. activities of up to 737?u/ ... | 2011 | 21811672 |
| sorption-assisted surface conjugation: a way to stabilize laccase enzyme. | enyzme immobilization on solid surfaces is one of the most relevant methods to improve enzyme activity and stability under harsh conditions over extended periods. a typically interesting application is the immobilization of laccases, multicopper enzymes oxidizing aromatic compounds, to solid surfaces in order to develop valuable tools for the elimination of micropollutants in wastewater. laccase of the white-rot fungus coriolopsis polyzona has been successfully immobilized on fumed silica nanopa ... | 2011 | 21847511 |