Deterioration of expanded polystyrene caused by Aureobasidium pullulans var. melanogenum
An expanded-polystyrene factory located in northern Buenos Aires reported unusual dark spots causing esthetic damage in their production. A fungal strain forming black-olive colonies on extract malt agar medium was isolated from the damaged material and identified as Aureobasidium pullullans var. me...
Guardado en:
| Autores principales: | , |
|---|---|
| Formato: | JOUR |
| Materias: | |
| Acceso en línea: | http://hdl.handle.net/20.500.12110/paper_03257541_v47_n3_p256_Castiglia |
| Aporte de: |
| id |
todo:paper_03257541_v47_n3_p256_Castiglia |
|---|---|
| record_format |
dspace |
| spelling |
todo:paper_03257541_v47_n3_p256_Castiglia2023-10-03T15:24:22Z Deterioration of expanded polystyrene caused by Aureobasidium pullulans var. melanogenum Castiglia, V.C. Kuhar, F. Industry Management Spot hydrogen peroxide hypochlorite sodium polystyrene agar culture medium disinfectant agent microsphere polystyrene derivative Article Aureobasidium pullulans deterioration disease elimination fungal colonization fungal contamination fungal strain fungus growth fungus hyphae melanogenum microbiological examination mycelium mycosis thermal death time antibiotic resistance Ascomycetes culture medium drug effects food contamination food industry food packaging growth, development and aging isolation and purification metabolism pH prevention and control procedures temperature Agar Ascomycota Culture Media Disinfectants Drug Resistance, Microbial Food Contamination Food Industry Food Packaging Hydrogen-Ion Concentration Microspheres Polystyrenes Temperature An expanded-polystyrene factory located in northern Buenos Aires reported unusual dark spots causing esthetic damage in their production. A fungal strain forming black-olive colonies on extract malt agar medium was isolated from the damaged material and identified as Aureobasidium pullullans var. melanogenum. This fungus is particularly known for its capacity to produce hydrolytic enzymes and a biodegradable extracellular polysaccharide known as pullulan, which is used in the manufacture of packaging material for food and medicine. Laboratory tests were conducted to characterize its growth parameters. It was found that the organism was resistant to a wide range of pHs but did not survive at temperatures over 65 ◦C. The proposed action plan includes drying of the material prior to packaging and disinfection of the machinery used in the manufacturing process and of the silos used for raw material storage. © 2014, Asociación Argentina de Microbiología. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_03257541_v47_n3_p256_Castiglia |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
Industry Management Spot hydrogen peroxide hypochlorite sodium polystyrene agar culture medium disinfectant agent microsphere polystyrene derivative Article Aureobasidium pullulans deterioration disease elimination fungal colonization fungal contamination fungal strain fungus growth fungus hyphae melanogenum microbiological examination mycelium mycosis thermal death time antibiotic resistance Ascomycetes culture medium drug effects food contamination food industry food packaging growth, development and aging isolation and purification metabolism pH prevention and control procedures temperature Agar Ascomycota Culture Media Disinfectants Drug Resistance, Microbial Food Contamination Food Industry Food Packaging Hydrogen-Ion Concentration Microspheres Polystyrenes Temperature |
| spellingShingle |
Industry Management Spot hydrogen peroxide hypochlorite sodium polystyrene agar culture medium disinfectant agent microsphere polystyrene derivative Article Aureobasidium pullulans deterioration disease elimination fungal colonization fungal contamination fungal strain fungus growth fungus hyphae melanogenum microbiological examination mycelium mycosis thermal death time antibiotic resistance Ascomycetes culture medium drug effects food contamination food industry food packaging growth, development and aging isolation and purification metabolism pH prevention and control procedures temperature Agar Ascomycota Culture Media Disinfectants Drug Resistance, Microbial Food Contamination Food Industry Food Packaging Hydrogen-Ion Concentration Microspheres Polystyrenes Temperature Castiglia, V.C. Kuhar, F. Deterioration of expanded polystyrene caused by Aureobasidium pullulans var. melanogenum |
| topic_facet |
Industry Management Spot hydrogen peroxide hypochlorite sodium polystyrene agar culture medium disinfectant agent microsphere polystyrene derivative Article Aureobasidium pullulans deterioration disease elimination fungal colonization fungal contamination fungal strain fungus growth fungus hyphae melanogenum microbiological examination mycelium mycosis thermal death time antibiotic resistance Ascomycetes culture medium drug effects food contamination food industry food packaging growth, development and aging isolation and purification metabolism pH prevention and control procedures temperature Agar Ascomycota Culture Media Disinfectants Drug Resistance, Microbial Food Contamination Food Industry Food Packaging Hydrogen-Ion Concentration Microspheres Polystyrenes Temperature |
| description |
An expanded-polystyrene factory located in northern Buenos Aires reported unusual dark spots causing esthetic damage in their production. A fungal strain forming black-olive colonies on extract malt agar medium was isolated from the damaged material and identified as Aureobasidium pullullans var. melanogenum. This fungus is particularly known for its capacity to produce hydrolytic enzymes and a biodegradable extracellular polysaccharide known as pullulan, which is used in the manufacture of packaging material for food and medicine. Laboratory tests were conducted to characterize its growth parameters. It was found that the organism was resistant to a wide range of pHs but did not survive at temperatures over 65 ◦C. The proposed action plan includes drying of the material prior to packaging and disinfection of the machinery used in the manufacturing process and of the silos used for raw material storage. © 2014, Asociación Argentina de Microbiología. |
| format |
JOUR |
| author |
Castiglia, V.C. Kuhar, F. |
| author_facet |
Castiglia, V.C. Kuhar, F. |
| author_sort |
Castiglia, V.C. |
| title |
Deterioration of expanded polystyrene caused by Aureobasidium pullulans var. melanogenum |
| title_short |
Deterioration of expanded polystyrene caused by Aureobasidium pullulans var. melanogenum |
| title_full |
Deterioration of expanded polystyrene caused by Aureobasidium pullulans var. melanogenum |
| title_fullStr |
Deterioration of expanded polystyrene caused by Aureobasidium pullulans var. melanogenum |
| title_full_unstemmed |
Deterioration of expanded polystyrene caused by Aureobasidium pullulans var. melanogenum |
| title_sort |
deterioration of expanded polystyrene caused by aureobasidium pullulans var. melanogenum |
| url |
http://hdl.handle.net/20.500.12110/paper_03257541_v47_n3_p256_Castiglia |
| work_keys_str_mv |
AT castigliavc deteriorationofexpandedpolystyrenecausedbyaureobasidiumpullulansvarmelanogenum AT kuharf deteriorationofexpandedpolystyrenecausedbyaureobasidiumpullulansvarmelanogenum |
| _version_ |
1782025313228685312 |