Influence of Temperature on the Extractibility of Polysaccharides in Barley
| Autor: | Rodica Căpriţă, Adrian Căpriţă, Iuliana Creţescu, Călin Julean |
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| Jazyk: | angličtina |
| Rok vydání: | 2011 |
| Předmět: | |
| Zdroj: | Scientific Papers Animal Science and Biotechnologies, Vol 44, Iss 2, Pp 81-88 (2011) |
| ISSN: | 2344-4576 1841-9364 |
| Popis: | Barley contains substantial amounts of both soluble and insoluble non-starch polysaccharides (NSP). The main watersoluble NSP in barley are highly viscous β-glucans. Monogastric animals, including humans and birds, cannotsynthesize β-glucanase, and the amount of β-glucanase derived from barley grain and bacteria in the gastrointestinaltract is insufficient to completely hydrolyze β-glucans. In the present investigation, we have studied the influence oftemperature and heating time on the extractibility of soluble polysaccharides in barley. Heating the barley samples at60°C and 80°C before extraction has the effect of lowering the soluble fraction of the polysaccharides. The dynamicviscosity values of water extracts from barley decreased up to 21.68% when heating at 60ºC for 15 minutes, and upto 25.30% when heating at 80ºC for 15 minutes, when the determinations were made immediately after extractseparation. Heating the barley samples for 15 minutes at 80°C deactivates the endogenous hydrolytic enzymes. |
| Databáze: | OpenAIRE |
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