Fungal biodegradation of lignopolystyrene graft copolymers

Milstein, O.; Gersonde, R.; Hüttermann, Aloys; Chen, Meng-Jiu; Meister, John J.

doi:10.1128/aem.58.10.3225-3232.1992

Cited by 72 publications

(27 citation statements)

References 34 publications

(26 reference statements)

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“…However, because the initial attack generally begins with a surface colonization, scanning electronic microscopy (SEM) allows direct observation of this kind of degradation 24, 25. The microorganisms' adhesion to the polymeric surface is a fundamental step in order for biodegradation to take place 26, 27…”

Section: Resultsmentioning

confidence: 99%

Thermally treated low density polyethylene biodegradation by Penicillium pinophilum and Aspergillus niger

Volke-Sepúlveda

Saucedo‐Castañeda

Gutiérrez-Rojas

et al. 2001

J of Applied Polymer Sci

171

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Differential scanning calorimetry (DSC), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR) and scanning electron microscopy (SEM) were used to determine morphological, structural and surface changes (biodegradation) on thermo-oxidized (80°C, 15 days) low-density polyethylene (TO-LDPE) incubated with Aspergillus niger and Penicillium pinophilum fungi, with and without ethanol as cosubstrate for 31 months. TO-LDPE mineralization by fungi was also evaluated. Significantly morphological and structural final changes on biologically treated TO-LDPE samples were observed. Decreases to three units on crystallinity and crystalline lamellar thickness (0.4 -1.8 Å), and increases in small-crystals content (up to 3.2%) and mean crystallite size (8.4 -14 Å) were registered. An oxidation decrease (almost twice) on samples without ethanol with respect to the control was observed, while in those with ethanol it was increased (up to 2.5 times). Double bond index increased more than twice from 21 to 31 months. The higher TO-LDPE changes and fungi-LDPE interaction was observed in samples with ethanol, suggesting that ethanol favors the TO-LDPE biodegradation, at least in case of P. pinophilum, probably by means of a cometabolic process. Mineralization of 0.50 % and 0.57 % for A. niger, and of 0.64 % and 0.37 % for P. pinophilum were obtained, for samples with and without ethanol, respectively. A model to explain morphological and structural changes on biologically treated TO-LDPE is also proposed.

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Section: Resultsmentioning

confidence: 99%

Thermally treated low density polyethylene biodegradation by Penicillium pinophilum and Aspergillus niger

Volke-Sepúlveda

Saucedo‐Castañeda

Gutiérrez-Rojas

et al. 2001

J of Applied Polymer Sci

171

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“…Only about 4% of pure polystyrene was degraded by the fungus in a parallel experiment. Production of lignin peroxidases and Mn(I1) peroxidases was observed during these experiments (Milstein et al, 1992). Polyethylene containing 6% starch was incubated with P. chrysosporium in another study (Lee et al, 1991).…”

Section: Modified Polymersmentioning

confidence: 81%

“…Although polystyrene [poly(l-phenylethylene)] is highly resistant to microbial attack (Kaplan et al, 19791, fungal biodegradation of lignopolystyrene graft copolymers has been reported (Milstein et al, 1992). White-rot basidiomycetes, including P. chrysosporium, were able to degrade LPS (lignin-polystyrene) graft copolymers.…”

Section: Modified Polymersmentioning

confidence: 99%

“…Work to date, however, indicates that there is reason to expect these problems to be overcome through the use of the proper fungal strains andlor proper modifications of process physiological conditions. Finally, scientists are beginning to use what they have learned during almost 20 years of studying the ligninolytic system of Phanerochaete chrysosporium to design biodegradability in chemicals like plastics (Milstein et al, 1992) and textile dyes (Pasti et al, 1991;Pasti-Grigsby et al, 1992;Paszczynski et al, 1991aPaszczynski et al, -1992. It is highly appropriate that the knowledge gained in spending millioins of dollars for basic research into ligninolysis by Phanerochaete chrysosporium can finally be used in this manner.…”

Section: Utility Of Phanerochaete Chrysosporium In Bioremediationmentioning

confidence: 99%

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Potential for Bioremediation of Xenobiotic Compounds by the White‐Rot Fungus Phanerochaete chrysosporium

Paszczyński

Crawford

1995

Biotechnology Progress

200

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The white‐rot fungi produce an unusual enzyme system, characterized by a specialized group of peroxidases, that catalyzes the degradation of the complex plant polymer lignin. This ligninolytic system shows a high degree of nonspecificity and oxidizes a very large variety of compounds in addition to lignin. Among these compounds are numerous environmental pollutants. Thus, the white‐rot fungi show considerable promise as bioremediation agents for use in the restoration of environments contaminated by xenobiotic molecules. One white‐rot fungus, Phanerochaete chrysosporium, has been studied in great detail with regard to ligninolytic enzymes and the degradation of anthropogenic chemicals. It has been widely promoted as a bioremediation agent. This article examines literature concerning the degradation of xenobiotic compounds by Phanerochaete chrysosporium and attempts to critically assess this organism's real potential as a bioremediation tool.

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“…found no signs of degradation of a polystyrene sheet buried in soil for 32 years. Incubation of a polystyrene‐starch copolymer with Bacillus coagulans and of polystyrene–lignin copolymers with fungi showed that the polymers supplemented with starch or lignin was indeed degraded. In a similar approach, it was reported that insertion of various mono‐ or disaccharides into the carbon backbone of polystyrene increased its biodegradability .…”

Section: Resultsmentioning

confidence: 99%

Biomimetic fabrication of biocompatible and biodegradable core–shell polystyrene/biosurfactant bionanocomposites for protein drug release

Hazra

Arunbabu

Kundu

et al. 2013

J of Chemical Tech & Biotech

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BACKGROUND: This paper reports a bioinspired emulsion polymerization approach through biosurfactants (rhamnolipid and surfactin) templating for synthesizing highly monodisperse, spherical polymer bionanocomposites consisting of polystyrene (PS) (core)/biosurfactants (shell) (50-190 nm) and their feasibility as a biocompatible and biodegradable drug delivery vehicle. RESULTS: Conversion profile, particle size dependence on biosurfactant concentration and structural characterizations of resulting polymers from bioinspired emulsion polymerization were similar to conventional emulsion polymerization.In vitro biodegradation studies revealed >2.5-fold increase in bacterial growth (Pseudomonas aeruginosa MTCC 7926) and gravimetric weight loss (10% w/w) in biosurfactants templated PS, compared with the conventional route. Soil burial biodegradation tests supported these findings. In vitro and in vivo biocompatibility studies showed unchanged cell viability of adult rat (Rattus norvegicus) hepatocytes for polystyrenes synthesized using biosurfactants, while conventional PS beads proved to be cytotoxic in a dose-dependent manner. Reactive oxygen species (ROS)-induced oxidative stress, increased lipid peroxidation, alterations in GSH detoxification and histopathology corroborated these results. Release of bovine serum albumin (BSA) from BSA loaded polystyrene/biosurfactant bionanocomposites were 2.5-5-fold higher in physiological buffer (pH 7.4) than in acidic buffer (pH 1.2). CONCLUSION: Taken together, polystyrene/biosurfactant bionanocomposites could serve as a biocompatible and biodegradable colon or intestine-specific drug delivery vehicle.

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Fungal biodegradation of lignopolystyrene graft copolymers

Cited by 72 publications

References 34 publications

Thermally treated low density polyethylene biodegradation by Penicillium pinophilum and Aspergillus niger

Thermally treated low density polyethylene biodegradation by Penicillium pinophilum and Aspergillus niger

Potential for Bioremediation of Xenobiotic Compounds by the White‐Rot Fungus Phanerochaete chrysosporium

Biomimetic fabrication of biocompatible and biodegradable core–shell polystyrene/biosurfactant bionanocomposites for protein drug release

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