Impact of black yeasts on the durability of polyurethane foam in tropical conditions in Vietnam
| Autor: | Hong Do Thi Thu, V.N. Sereda, Cuong Ngo Cao, Thinh Do Tat, Hoai Nguyen Thu |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
lcsh:GE1-350
Urease biology Black yeast Chemistry Microorganism 0211 other engineering and technologies 02 engineering and technology 010501 environmental sciences Biodegradation 01 natural sciences Durability chemistry.chemical_compound biology.protein 021108 energy Food science Genus Aureobasidium lcsh:Environmental sciences 0105 earth and related environmental sciences Polyurethane |
| Zdroj: | E3S Web of Conferences, Vol 169, p 02007 (2020) |
| ISSN: | 2267-1242 |
| Popis: | Polyurethane (PU) is a material that is widely used in industries. However, tropical climatic conditions in Vietnam often make the durability of PU lower than temperate climatic conditions. One of the causes of this problem is the biodegradation of microorganisms. In this study, biological characteristics of black yeast on PU is evaluated, thereby, initially assessing the impact of black yeast on the durability of PU in tropical conditions. Ten strains of black yeast were isolated from used PU foam samples in Vietnam. These black yeast strains were tested for enzyme activity including: urease activity, protease activity, polyurethanase activity. There were two strains selected to identify based on sequence analysis of the ITS1/ITS2 region, they belong to genusAureobasidium. VN1Y3 was strain selected for biodegradability testing of PU foam samples. After 28 days of testing, the PU foam samples that have been infected with black yeasts have a change compared to the control in terms of color, surface, tensile strength, elongation. Research results have showed the impact of black yeast on the durability of PU. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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