Studies on the nitrogen recovery in enzymic hydrolysis of Atlantic salmon (Salmo salar, L.) frames by Protamex ™ protease
In three consecutive experiments, frames without heads from Atlantic salmon were hydrolysed by Protamex ™ protease. In experiment I (24 factorial design) nitrogen recoveries (NR) of 44–76 % were obtained, after 120 min of hydrolysis, by systematically varying the hydrolysing parameters, starting pH...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.518.9727 2023-05-15T15:31:39+02:00 Studies on the nitrogen recovery in enzymic hydrolysis of Atlantic salmon (Salmo salar, L.) frames by Protamex ™ protease Bjørn Liaset Ragnar Nortvedt Einar Lied Marit Espe The Pennsylvania State University CiteSeerX Archives 2001 application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.518.9727 http://www.docmar.net/upload/Dokmntr/Liaset et al 02.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.518.9727 http://www.docmar.net/upload/Dokmntr/Liaset et al 02.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://www.docmar.net/upload/Dokmntr/Liaset et al 02.pdf Enzymic hydrolysis Fish protein hydrolysate Salmon frames By-products Nitrogen recovery Optimisation Protamex™ www.elsevier.com/locate/procbio text 2001 ftciteseerx 2016-01-08T10:00:01Z In three consecutive experiments, frames without heads from Atlantic salmon were hydrolysed by Protamex ™ protease. In experiment I (24 factorial design) nitrogen recoveries (NR) of 44–76 % were obtained, after 120 min of hydrolysis, by systematically varying the hydrolysing parameters, starting pH (5.4–7.7), temperature (36–50 °C), E:S ratio (30–90 AU kg−1 crude protein) and frames–water ratio (0.71–1.21) between low and high levels. The highest levels of E:S ratio (90 AU kg−1 crude protein), temperature (50 °C) and starting pH (7.7) and the lowest level of frames–water ratio (0.71) resulted in the highest NR (76%). In experiment II, the optimal temperature and starting pH in the hydrolysis with Protamex ™ were established at 50–56 °C and 6.5–7.6, respectively. Beyond these temperature and starting pH intervals, the NR tended to decrease. In experiment III, at optimal temperature (50 °C) and starting pH (6.5) conditions and frames–water ratio of 1.2, NR of 43–61 % were achieved after 60 min of hydrolysis, by varying the E:S ratios from 10–90 AU kg−1 crude protein. The highest E:S ratio resulted in the highest NR but running the hydrolysis for a period longer than 60 min resulted in little increase in NR. © 2002 Elsevier Science Ltd. All rights reserved. Text Atlantic salmon Salmo salar Unknown |
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English |
topic |
Enzymic hydrolysis Fish protein hydrolysate Salmon frames By-products Nitrogen recovery Optimisation Protamex™ www.elsevier.com/locate/procbio |
spellingShingle |
Enzymic hydrolysis Fish protein hydrolysate Salmon frames By-products Nitrogen recovery Optimisation Protamex™ www.elsevier.com/locate/procbio Bjørn Liaset Ragnar Nortvedt Einar Lied Marit Espe Studies on the nitrogen recovery in enzymic hydrolysis of Atlantic salmon (Salmo salar, L.) frames by Protamex ™ protease |
topic_facet |
Enzymic hydrolysis Fish protein hydrolysate Salmon frames By-products Nitrogen recovery Optimisation Protamex™ www.elsevier.com/locate/procbio |
description |
In three consecutive experiments, frames without heads from Atlantic salmon were hydrolysed by Protamex ™ protease. In experiment I (24 factorial design) nitrogen recoveries (NR) of 44–76 % were obtained, after 120 min of hydrolysis, by systematically varying the hydrolysing parameters, starting pH (5.4–7.7), temperature (36–50 °C), E:S ratio (30–90 AU kg−1 crude protein) and frames–water ratio (0.71–1.21) between low and high levels. The highest levels of E:S ratio (90 AU kg−1 crude protein), temperature (50 °C) and starting pH (7.7) and the lowest level of frames–water ratio (0.71) resulted in the highest NR (76%). In experiment II, the optimal temperature and starting pH in the hydrolysis with Protamex ™ were established at 50–56 °C and 6.5–7.6, respectively. Beyond these temperature and starting pH intervals, the NR tended to decrease. In experiment III, at optimal temperature (50 °C) and starting pH (6.5) conditions and frames–water ratio of 1.2, NR of 43–61 % were achieved after 60 min of hydrolysis, by varying the E:S ratios from 10–90 AU kg−1 crude protein. The highest E:S ratio resulted in the highest NR but running the hydrolysis for a period longer than 60 min resulted in little increase in NR. © 2002 Elsevier Science Ltd. All rights reserved. |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Bjørn Liaset Ragnar Nortvedt Einar Lied Marit Espe |
author_facet |
Bjørn Liaset Ragnar Nortvedt Einar Lied Marit Espe |
author_sort |
Bjørn Liaset |
title |
Studies on the nitrogen recovery in enzymic hydrolysis of Atlantic salmon (Salmo salar, L.) frames by Protamex ™ protease |
title_short |
Studies on the nitrogen recovery in enzymic hydrolysis of Atlantic salmon (Salmo salar, L.) frames by Protamex ™ protease |
title_full |
Studies on the nitrogen recovery in enzymic hydrolysis of Atlantic salmon (Salmo salar, L.) frames by Protamex ™ protease |
title_fullStr |
Studies on the nitrogen recovery in enzymic hydrolysis of Atlantic salmon (Salmo salar, L.) frames by Protamex ™ protease |
title_full_unstemmed |
Studies on the nitrogen recovery in enzymic hydrolysis of Atlantic salmon (Salmo salar, L.) frames by Protamex ™ protease |
title_sort |
studies on the nitrogen recovery in enzymic hydrolysis of atlantic salmon (salmo salar, l.) frames by protamex ™ protease |
publishDate |
2001 |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.518.9727 http://www.docmar.net/upload/Dokmntr/Liaset et al 02.pdf |
genre |
Atlantic salmon Salmo salar |
genre_facet |
Atlantic salmon Salmo salar |
op_source |
http://www.docmar.net/upload/Dokmntr/Liaset et al 02.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.518.9727 http://www.docmar.net/upload/Dokmntr/Liaset et al 02.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
_version_ |
1766362177459978240 |