Decolorization of PolyR-478 (Polyvinylamine sulfonate anthrapyridone) byCyathus bulleri

Vasdev, Kavita; Kuhad, Ramesh Chander

doi:10.1007/bf02814532

Cited by 25 publications

(23 citation statements)

References 7 publications

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“…Hence biotransformation of Poly R-478 could be noted only with active Trametes versicolor. This is in accordance with the observations made by Glenn & Gold (1983) [27] and Vasdev & Kuhad (1994) [30]. Considering an adsorption of Poly R-478 by bacterial contaminants of 24%, up to 65% was biotransformed by Trametes versicolor.…”

Section: Continuous Cultivation Of Pval-encapsulated Trametes Versicosupporting

confidence: 79%

“…This experiment was carried out to test adsorption of Poly R-478 on PVAL hydrogel beads and on inactive fungal biomass. Decolorization of Poly R-478 was determined spectrophotometrically as previously described [27,30]. The dye was added to the liquid media before sterilisation to give a ®nal concentration of 200 mg l A1 .…”

Section: Continuous Decolorization Tests At Non-sterile Culture Condimentioning

confidence: 99%

“…In batch cultures the activity of the ligninolytic enzymes ®rst increased and then decreased with incubation time [30,33,34], whereas in continuous cultures with immobilised Phanerochaete chrysosporium the enzyme activity seemed to be stable [21,22].…”

Section: Introductionmentioning

confidence: 99%

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Biotransformation of Poly R-478 by continuous cultures of PVAL-encapsulated Trametes versicolor under non-sterile conditions

Leidig

Prüße

Vorlop

et al. 1999

Bioprocess Engineering

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Mycelia of Trametes versicolor were aseptically encapsulated in PVAL hydrogel beads of 1±2 mm diameter. The encapsulated mycelia were grown continuously in an aerated reactor under non-sterile conditions. After 65 days contamination of the PVAL hydrogel beads by bacteria was found only in the outer layer to a depth of 50 lm. The encapsulated fungi still expressed ligninolytic enzymes, as con®rmed by the biotransformation of Poly R-478. Elimination of Poly R-478 by encapsulated Trametes versicolor reached an ef®ciency of up to 89%, which was due partially to biotransformation (65%) and partially to adsorption onto biomass (24%). PVAL-encapsulated mycelia of Trametes versicolor were viable for at least 6 months without nutrient supplementation, if stored at 7°C in a refrigerator. By encapsulation Trametes versicolor was apparently protected against microbial contaminants and against mechanical stress, which is known to inactivate ligninolytic enzymes. Encapsulated Trametes versicolor might thus be applicable for bioremediation to serve as an inoculum for reactor systems or for ®eld-side applications.

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Section: Continuous Cultivation Of Pval-encapsulated Trametes Versicosupporting

confidence: 79%

Section: Continuous Decolorization Tests At Non-sterile Culture Condimentioning

confidence: 99%

See 1 more Smart Citation

Biotransformation of Poly R-478 by continuous cultures of PVAL-encapsulated Trametes versicolor under non-sterile conditions

Leidig

Prüße

Vorlop

et al. 1999

Bioprocess Engineering

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“…(Kuhar et al 2008;Kidwai et al 2009), RCK-2, RCK-3, RCK-4, RCK-5, and RCK-6. The fungal isolates were grown and maintained on malt extract agar (MEA) containing (g L −1 ): malt extract 20.0, KH 2 PO 4 0.5, MgSO 4 ·7H 2 O 0.5, Ca (NO 3 ) 2 ·4H 2 O 0.5, agar 20.0 (pH 6.5; Vasdev and Kuhad 1994;Dhawan and Kuhad 2004) and were incubated at 30°C. Pure fungal cultures were stored at 4°C and subcultured every fortnight.…”

mentioning

confidence: 99%

Decolorization of Synthetic Dyes and Textile Effluents by Basidiomycetous Fungi

Diwaniyan

Kharb

Raghukumar

et al. 2009

Water Air Soil Pollut

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Decolorization of six synthetic dyes and two raw textile effluents (A and B) by eight basidiomycetous fungi was investigated. Among eight basidiomycetous fungi, fungal isolate RCK-1 decolorized textile effluent A maximally (42%), while fungal isolate RCK-3 was found to decolorize more of Congo Red (69%), Xylidine Ponceau 2R (100%), Poly R-478 (96%), Indigo Carmine (99%), Lissamine Green B (90%), Toluidine Blue (57%) and textile effluent B (54%), than the rest of fungi. Percentage decolorization of all synthetic dyes and textile effluents by the new fungal isolates RCK-1 and RCK-3 was higher compared to the most widely studied simultaneous lignin degrader, Phanerochaete chrysosporium and selective lignin degrader, Pycnoporus cinnabarinus, when tested in liquid cultures. A statistically significant positive correlation between laccase production and decolorization of dyes and effluents was obtained as compared to other ligninolytic enzymes (lignin peroxidase and manganese peroxidase) production. This showed the importance of the differential contribution of the different ligninolytic enzymes towards the decolorization of the synthetic dyes and textile effluents. The substantially higher ligninolytic enzyme production by the fungal isolates RCK-1 and RCK-3 also suggested their potential use for textile effluent treatment and other possible biotechnological applications.

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“…[16] One unit (U) of laccase was defined as the change in absorbance of 0.01 mL À1 min À1 at 470 nm.…”

Section: Enzyme Assaymentioning

confidence: 99%

Laccase from Basidiomycetous Fungus Catalyzes the Synthesis of Substituted 5‐Deaza‐10‐oxaflavins via a Domino Reaction

et al. 2009

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Abstract:The present investigation provides a simple and convenient route for the synthesis of substituted 5-deaza-10-oxaflavins owing to their importance as probable redox coenzymes. The reaction of a,b-unsaturated derivatives of barbituric acid and dimedone with catechol or 1,4-hydroquinones was catalyzed using laccase in aqueous medium. Quinones, generated in situ by the oxidation of the corresponding catechol or 1,4-hydroquinones, underwent a domino reaction with chalcones to produce 5-deaza-10-oxaflavins and tetrahydroxanthen-1-ones.

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Decolorization of PolyR-478 (Polyvinylamine sulfonate anthrapyridone) byCyathus bulleri

Cited by 25 publications

References 7 publications

Biotransformation of Poly R-478 by continuous cultures of PVAL-encapsulated Trametes versicolor under non-sterile conditions

Biotransformation of Poly R-478 by continuous cultures of PVAL-encapsulated Trametes versicolor under non-sterile conditions

Decolorization of Synthetic Dyes and Textile Effluents by Basidiomycetous Fungi

Laccase from Basidiomycetous Fungus Catalyzes the Synthesis of Substituted 5‐Deaza‐10‐oxaflavins via a Domino Reaction

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