0000000000309394

AUTHOR

Velta Tupureina

showing 3 related works from this author

PHA Latex Composite Films: Mechanical Properties and Surface Visualization

2013

Homopolymer PHB and copolymer PHB/HV containing granules were isolated from Azotobacter chroococcum cells and used for latexes formation. Composite latex films were formed from the PHB and PHB/HV latexes with different content of poly (vinyl alcohol) and glycerol and a hydrophobic fluorescent benzanthrone derivated dye 3-piperidinobenzanthrone, possessed high fluorescence intensity in a system with PHA granules. Fluorescence based methods were used for characterization of the elaborated latex film by their stability at high temperature and for visualization of the film surfaces PHA granules distribution. Film stability in phosphate buffered saline was evaluated by dye migration activity in …

Vinyl alcoholMaterials scienceStability testMechanical EngineeringComposite numbermedicine.disease_causeFluorescenceBenzanthronechemistry.chemical_compoundChemical engineeringchemistryMechanics of MaterialsmedicineCopolymerGlycerolAzotobacter chroococcumGeneral Materials ScienceComposite materialKey Engineering Materials
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PHB-based films as matrices for pesticides

2002

Abstract The effects of pesticides incorporated into PHB-based polymeric matrices on the biodegradability of films and antifungal efficiency of immobilised pesticides to Botrytis cinerea was studied. The mass loss of tested PHB-based films for 2 weeks was 40–50% and after 4 weeks 92–96% of the initial mass. The fungicides Ronilan and Sumilex immobilised into the polymeric matrices did not depress the film degradation rate. PHB-based films caused changes in the soil microorganism association. Fungicides immobilised in PHB-based matrices decreased the count of the phytopathogenic fungus B. cinerea.

biologyChemistryMicroorganismtechnology industry and agriculturePlasticizerBioengineeringmacromolecular substancesBiodegradationPesticidemedicine.disease_causebiology.organism_classificationApplied Microbiology and BiotechnologyBiochemistryFungicidemedicineOrganic chemistryDegradation (geology)Azotobacter chroococcumlipids (amino acids peptides and proteins)Nuclear chemistryBotrytis cinereaProcess Biochemistry
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Influence of Nanoclay Additive on Mechanical Properties of Bio-Based Polyurethane Nanocomposites

2013

This paper is about investigation of the bio-based polyurethanes from the rapeseed oil polyols and their modification with montmorillonite nanoparticles. The results of hardness and tensile properties investigation of polyurethane / montmorillonite nanocomposites are presented.

chemistry.chemical_compoundMaterials scienceMontmorilloniteNanocompositechemistryMechanics of MaterialsMechanical EngineeringUltimate tensile strengthBio basedNanoparticleGeneral Materials ScienceComposite materialPolyurethaneKey Engineering Materials
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