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Question
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Answers
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Timestamped validation
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| 1
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What is the atomic composition of biodegradable materials?
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Current biodegradable materials are frequently heteropolymers and complex mixtures whose exact atomic composition is unknown.
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| 2
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Which polymer is biodegradable in marine environment?
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PHB is a biosynthetic polymer belonging to the family of polyhydroxyalkanoates , proved biodegradable in marine environment .
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| 3
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Is the term "biodegradable" on plastic products a trusted label?
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the use of the term ‘biodegradable’ in labels of plastic products is controversial, and instances of ‘greenwashing’ have been reported.
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| 4
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) Who tested the effect of PHB presentation on biodegradation rates?
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| 5
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What is the amount of oxygen in a closed bottle?
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| 6
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What is the protocol for?
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Identify truly marine biodegradable plastics
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What are some approaches to reducing the environmental impact of plastics?
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development of an environmentally relevant nutrient formulation following Redfield ratio ;
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Use of a natural inoculum representative of marine habitats
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What are some of the threats to marine ecosystems?
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Environmental persistence, lack of a proper land-based , and global circulation
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What is the definition of Biodegradation?
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Biodegradation can be formally defined as the mineralization of organic matter mediated by heterotrophic microorganisms, leading in aerobic conditions to CO2 and H2O, and to an increase in the biomass of microorganisms (Subach, 1997)
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How to measure biodegradability in the sea?
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Potential biodegradability in the sea can thus be assessed in laboratory on the basis of mineralization rates obtained under simulated marine conditions, but current standards are insufficient in their ability to realistically predict the biodegradability of plastic objects such as carrier bags in aquatic environments (Harrison et al., 2018).
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What are the criteria that determine a biodegradable polymer?
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A truly biodegradable polymer must be amenable to mineralization to CO2 by natural microorganisms under a set of standardized incubation conditions representative of a given environmental compartment.
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What are "green plastics"?
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Can be fully or only partially made from biological resources and, thus, have limited environmental benefit
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How much of the plastic in intended for immediate disposal?
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About 42% of the plastic produced is intended for packaging, that is for immediate disposal (Geyer et al., 2017).
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What is originating an increase in demand for landfill space?
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The low density, high bulk and increasing presence of plastic in municipal solid waste demands increasing amounts of landfill space
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