{"refrec":{"BRefID":256630,"RR":"<b>Verhaeghe, T.; Vlaemynck, G.; De Block, J.; Van Weyenberg, S.; Hendrickx, M.</b> (2016). Thermal inactivation kinetics of proteases and polyphenoloxidase in brown shrimp (<i>Crangon crangon</i>). <i>Food Chemistry 197(part A)</i>: 641-647. <a href=\"https://dx.doi.org/10.1016/j.foodchem.2015.11.024\" target=\"_blank\">https://dx.doi.org/10.1016/j.foodchem.2015.11.024</a>","BEntID":248639,"PublicFlag":1,"CheckedFlag":1,"wosflag":1,"vabbflag":1,"RefStringPartII":". <i>Food Chemistry 197(part A)</i>: 641-647. <a href=\"https://dx.doi.org/10.1016/j.foodchem.2015.11.024\" target=\"_blank\">https://dx.doi.org/10.1016/j.foodchem.2015.11.024</a>","DocTypID":8,"DocType":"Journal article","MarineFlag":1,"FreshFlag":0,"BrackishFlag":0,"TerrestrialFlag":0,"Authorstring":"Verhaeghe, T.; Vlaemynck, G.; De Block, J.; Van Weyenberg, S.; Hendrickx, M.","OrigTitleTranslFlag":0,"Authorstringtrunc":"Verhaeghe, T. <i>et al.</i>","Englishabstract":"To optimize product quality of the cooked brown shrimp (<i>Crangon crangon</i>), quantitative data on the influence of all relevant process parameters (treatment time and temperature) on several quality attributes is required. Surprisingly, kinetic data and models on heat induced inactivation of important endogenous spoilage enzymes of the brown shrimp are not available today. In this study the thermal inactivation kinetics of the most important spoilage enzymes, proteases and polyphenoloxidase (PPO), were determined from isothermal heat treatments of enzyme extracts of the cephalothorax. For both enzymes, inactivation kinetics showed first order decay(s). Proteases showed two distinct stability fractions. A labile fraction, representing 42 ± 2% of the total activity with <i>k<sub>l</sub></i><sub>,60 °C</sub> = 0.94 ± 0.14 min<sup>-1</sup> and <i>E<sub>a</sub></i><sub>,</sub><i><sub>l</sub></i> = 178 ± 8.5 kJ/mol, and a stable fraction, representing 58 ± 2%, with <i>k<sub>s</sub></i><sub>,60 °C</sub> = 0.020 ± 0.002 min<sup>-1</sup> and <i>E<sub>a</sub></i><sub>,</sub><i><sub>s</sub></i> = 155 ± 7.0 kJ/mol. PPO showed a single fraction with <i>k</i><sub>60 °C</sub> = 1.58 ± 0.02 min<sup>-1</sup> and <i>E<sub>a</sub></i> = 161 ± 2.2 kJ/mol. Based on these results, the proteolytic activity, in particular the thermostable fraction, should be considered as a target in thermal processing of brown shrimp in relation to enzyme induced product quality changes during storage.","AbstractOtherLang":null,"BibLvlCode":"AS","StandardTitle":"Thermal inactivation kinetics of proteases and polyphenoloxidase in brown shrimp (<i>Crangon crangon</i>)","OrigTitleLangCode":"en","OrigTitleLangCodeExtended":"eng","OrigTitleLangID":15,"DateLastModified":{"date":"2024-12-10 01:33:17.368041","timezone_type":1,"timezone":"+01:00"},"UserAccessRight":null,"UserAccID":null,"AuthorKeywords":"Crangon crangon; Polyphenoloxidase; Proteases; Thermal stability;Kinetics","OtherDescriptors":null,"Notes":null,"AnaPub":2016,"MonPub":null,"DateUpdate":"2018-08-27","DateCreate":"2016-05-29","SecASFANote":null,"ConfID":null,"PeerRev":1,"VlizCoreFlag":1,"WoScode":"WOS:000366985900082","VABBcode":null,"OpenAcc":0,"DOI":"10.1016/j.foodchem.2015.11.024"},"refs":null,"anarec":{"AnaID":256630,"PubliDate":2016,"Pagination":"641-647","XtraPublOfAnaID":null,"ISBN":null,"Volume":"197","Issue":"part A","BRefMon":null,"BRefMonRR":null,"BRefXtra":null,"BRefXtraRR":null,"SerBRefID":45225,"SerRR":"Food Chemistry. 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