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231223s2009 xx |||||o 00| ||eng c |
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|a 10.1021/la804094n
|2 doi
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|a pubmed24n0628.xml
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|a (DE-627)NLM188461116
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|a (NLM)19435293
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|a DE-627
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|c DE-627
|e rakwb
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|a eng
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1 |
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|a Mercadé-Prieto, Ruben
|e verfasserin
|4 aut
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|a Alkali cold gelation of whey proteins. Part II
|b Protein concentration
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|c 2009
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
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|2 rdamedia
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|a ƒa Online-Ressource
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|2 rdacarrier
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|a Date Completed 23.07.2009
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|a Date Revised 19.11.2015
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|a published: Print
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|a Citation Status MEDLINE
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|a The effect of the whey protein isolate (WPI) concentration on the sol-gel-sol transition in alkali cold gelation was investigated at pH 11.6-13 using oscillatory rheometry. The elastic modulus increases quickly with time to reach a local maximum (G'max), followed by a degelation step where the modulus decreases to a minimum value (G'min). Depending on the pH, a second gelation step will occur. At the end of the first gelation step around G'max, the system fulfilled the Winter-Chambon criterion of gelation. The analysis of the maximum moduli with the protein concentration shows that (i) there is a percolation concentration above which an elastic response is observed (approximately 6.8 wt %); (ii) there are two concentration regimes for G''max and G''max above this concentration, where we have considered power-law and percolation equations; (iii) there is a crossover concentration between the two regimes (at approximately 8 wt %) for both G'max and G''max when both moduli are equal, and this value is constant under all conditions tested (G'max=G''max approximately 4 Pa). Therefore, alkali cold gelation is better represented using two concentrations regimes than one, as observed for other biopolymers
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|a Journal Article
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|a Gels
|2 NLM
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|a Milk Proteins
|2 NLM
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| 650 |
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|a Whey Proteins
|2 NLM
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|a Sodium Hydroxide
|2 NLM
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|a 55X04QC32I
|2 NLM
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|a Gold
|2 NLM
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|a 7440-57-5
|2 NLM
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|a Gunasekaran, Sundaram
|e verfasserin
|4 aut
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| 773 |
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|i Enthalten in
|t Langmuir : the ACS journal of surfaces and colloids
|d 1992
|g 25(2009), 10 vom: 19. Mai, Seite 5793-801
|w (DE-627)NLM098181009
|x 1520-5827
|7 nnns
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| 773 |
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|g volume:25
|g year:2009
|g number:10
|g day:19
|g month:05
|g pages:5793-801
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|u http://dx.doi.org/10.1021/la804094n
|3 Volltext
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