| People | Locations | Statistics |
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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Gapes, Daniel
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (4/4 displayed)
- 2019Rheological behavior of high cell density Pseudomonas putida LS46 cultures during production of medium chain length Polyhydroxyalkanoate (PHA) Polymerscitations
- 2017Rheological measurements as a tool for monitoring the performance of high pressure and high temperature treatment of sewage sludgecitations
- 2013Rheology of a primary and secondary sewage sludge mixture: Dependency on temperature and solid concentrationcitations
- 2009Physico-chemical properties of polyhydroxyalkanoate produced by mixed-culture nitrogen-fixing bacteria
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article
Physico-chemical properties of polyhydroxyalkanoate produced by mixed-culture nitrogen-fixing bacteria
Abstract
Ultra-high molecular weight polyhydroxyalkanoates with low polydispersity index(PDI=1.3)were produced in a novel,pilot scale application of mixed cultures of nitrogen-fixing bacteria. The number average molecular weight(Mn)of the poly(3-hydroxybutyrate)(P(3HB))and poly(3-hydroxybutyrate-co-3-hydroxyvalerate)(P(3HB-co-3HV))was determined to be 2.4 106 g mol-1 and 2.5 106 g mol-1 respectively. Using two types of carbon sources,biomass contents of the P(3HB)and P(3HB-co-3HV)were 18%and 30%(PHA in dry biomass)respectively. The extracted polymers were analysed for their physical properties using analytical techniques such as nuclear magnetic resonance(NMRspectroscopy,differential scanning calorimetry(DSC)and gel permeation chromatography(GPC). NMR confirmed the formation of homopolymer and copolymer. DSC showed a single melting endotherm peak for both polymers,with enthalpies that indicated crystallinity indices of 44%and 37%for P(3HB)and P(3HB-co-3HV)respectively. GPC showed a sharp unimodal trace for both polymers,reflecting the homogeneity of the polymer chains. The work described here emphasises the potential of mixed colony nitrogen-fixing bacteria cultures for producing biodegradable polymers which have properties that are very similar to those from their pure culture counterparts,and therefore making a more economically viable route for obtaining biopolyesters.