Enhancement of Pyrroloquinoline Quinone Production and Polyvinyl Alcohol Degradation in Mixed Continuous Cultures of
            <i>Pseudomonas putida</i>
            VM15A and
            <i>Pseudomonas</i>
            sp. Strain VM15C with Mixed Carbon Sources

Shimao, Masayuki; Fujita, I.; Kato, Nobuo; Sakazawa, Chikahiro

doi:10.1128/aem.49.6.1389-1391.1985

Cited by 17 publications

(6 citation statements)

References 8 publications

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“…27 There are many examples of growth stimulation of microorganisms by PQQ, 41 such as the microbial production of PQQ of, 42 or the report of PQQ as an essential growth factor of a poly (vinyl alcohol)-degrading bacteria of. 43 …”

Section: To the Editormentioning

confidence: 99%

PQQ Supplementation and SARS-CoV-2 Spike Protein-Induced Heart Inflammation

Boretti¹

2022

Natural Product Communications

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SARS-CoV-2 spike protein-induced heart inflammation may originate from either COVID-19 infection or the administration of COVID-19 mRNA vaccines. As pyrroloquinoline quinone (PQQ) is a scavenger of free radicals, redox cofactor, and antioxidant which supports cognitive and mitochondrial functions, supplementation with PQQ could have a positive effect to reduce heart inflammation after COVID-19 mRNA vaccines. However, there is no evidence yet for this opportunity in the literature. Cellular and animal model results are missing. Similarly, no clinical trials have been conducted. While it is recommended to measure the levels of the cardiac biomarkers before and after COVID-19 vaccination, no recommendation can be made about supplementation with PQQ, which, however, we note has no contraindication.

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Section: To the Editormentioning

confidence: 99%

PQQ Supplementation and SARS-CoV-2 Spike Protein-Induced Heart Inflammation

Boretti¹

2022

Natural Product Communications

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“…Polyvinyl alcohol (PVA) is the only vinyl polymer that can be used by bacteria as a carbon source and energy source. Under the action of bacteria and enzymes [ 9 , 10 , 11 , 12 ], PVA can be degraded by 75% in 46 days, so it belongs to a kind of biodegradable polymer material [ 13 ]. PVA is a water-soluble polymer with a carbon chain as the main chain and a large number of hydroxyl groups in the side chain [ 14 , 15 ].…”

Section: Introductionmentioning

confidence: 99%

Research Progress of Polyvinyl Alcohol Water-Resistant Film Materials

2022

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Polyvinyl alcohol (PVA) is one of the few biodegradable synthetic resins from petroleum-based sources that can alleviate white pollution in the environment. PVA film materials have excellent properties, such as high barrier, high transparency, high toughness, biocompatibility, and adjustable water solubility. However, due to the presence of hydrophilic hydroxyl groups in the side chain of PVA resin, when PVA film is placed in a humid or water environment, swelling or even dissolution will occur, which greatly limits its application. Therefore, it is necessary to modify PVA resin to improve water resistance without reducing other properties and can also impart various functionalities to it, thereby widening the application range. This paper reviews the water-resistant modification methods of polyvinyl alcohol and the application of water-resistant films and provides an outlook on the development trend of PVA water-resistant films.

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“…First, an oxidase (a secondary alcohol oxidase [18] or a specific PVA oxidase [19]) leads to the formation of β-hydroxyketone groups, which are later cleaved by the second enzyme, a β-diketone hydrolase [18]. A number of Pseudomonas strains have been identified as PVA degraders [20], along with Bacillus [21,22] and several fungal yeast strains [12].…”

Section: Introductionmentioning

confidence: 99%

Upcycling Biodegradable PVA/Starch Film to a Bacterial Biopigment and Biopolymer

et al. 2021

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Meeting the challenge of circularity for plastics requires amenability to repurposing post-use, as equivalent or upcycled products. In a compelling advancement, complete circularity for a biodegradable polyvinyl alcohol/thermoplastic starch (PVA/TPS) food packaging film was demonstrated by bioconversion to high-market-value biopigments and polyhydroxybutyrate (PHB) polyesters. The PVA/TPS film mechanical properties (tensile strength (σu), 22.2 ± 4.3 MPa; strain at break (εu), 325 ± 73%; and Young’s modulus (E), 53–250 MPa) compared closely with low-density polyethylene (LDPE) grades used for food packaging. Strong solubility of the PVA/TPS film in water was a pertinent feature, facilitating suitability as a carbon source for bioprocessing and microbial degradation. Biodegradability of the film with greater than 50% weight loss occurred within 30 days of incubation at 37 °C in a model compost. Up to 22% of the PVA/TPS film substrate conversion to biomass was achieved using three bacterial strains, Ralstonia eutropha H16 (Cupriavidus necator ATCC 17699), Streptomyces sp. JS520, and Bacillus subtilis ATCC6633. For the first time, production of the valuable biopigment (undecylprodigiosin) by Streptomyces sp. JS520 of 5.3 mg/mL and the production of PHB biopolymer at 7.8% of cell dry weight by Ralstonia eutropha H16 from this substrate were reported. This low-energy, low-carbon post-use PVA/TPS film upcycling model approach to plastic circularity demonstrates marked progress in the quest for sustainable and circular plastic solutions.

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Enhancement of Pyrroloquinoline Quinone Production and Polyvinyl Alcohol Degradation in Mixed Continuous Cultures of Pseudomonas putida VM15A and Pseudomonas sp. Strain VM15C with Mixed Carbon Sources

Cited by 17 publications

References 8 publications

PQQ Supplementation and SARS-CoV-2 Spike Protein-Induced Heart Inflammation

PQQ Supplementation and SARS-CoV-2 Spike Protein-Induced Heart Inflammation

Research Progress of Polyvinyl Alcohol Water-Resistant Film Materials

Upcycling Biodegradable PVA/Starch Film to a Bacterial Biopigment and Biopolymer

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