Effect of coagulation temperature on cooking integrity of heat and acid-induced milk gels
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Effect of coagulation temperature on cooking integrity of heat and acid-induced milk gels. / Laursen, Anne Katrine ; Dyrnø, Steffan Bue ; Steven Mikkelsen, Kim; Czaja, Tomasz Pawel; Rovers, Tijs Albert Maria; Ipsen, Richard; Ahrné, Lilia.
I: Food Research International, Bind 169, 112846, 2023.Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › fagfællebedømt
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TY - JOUR
T1 - Effect of coagulation temperature on cooking integrity of heat and acid-induced milk gels
AU - Laursen, Anne Katrine
AU - Dyrnø, Steffan Bue
AU - Steven Mikkelsen, Kim
AU - Czaja, Tomasz Pawel
AU - Rovers, Tijs Albert Maria
AU - Ipsen, Richard
AU - Ahrné, Lilia
N1 - Publisher Copyright: © 2023 The Author(s)
PY - 2023
Y1 - 2023
N2 - Heat and acid-induced milk gels do not melt or flow upon heating and thus show great potential as a dairy-based protein source for cooking, e.g. for stews. Understanding how processing, e.g. acidification, affects the cooking behavior of these gels is therefore of great industrial interest. The cooking integrity of gels produced by rapidly acidifying milk using citric acid at temperatures of 60, 75, and 90 °C, was determined by analyzing composition, texture, and spatial water distribution before and after cooking. Increasing the acidification temperature from 60 to75 °C resulted in a significant reduction of yield, due to decreased moisture content of the gels. With increasing content of solids, the gels grew harder and denser, as observed by texture profile analysis and low-field Nuclear Magnetic Resonance. Upon cooking the 60 °C gel lost a significant amount of moisture, due to the contraction of the porous protein network. The more compact gels, prepared at 75 and 90 °C, did not lose mass indicating good cooking integrity, i.e. a gel that keeps its structure during cooking. Acidification temperature thus greatly influenced cooking integrity. The effect was mainly ascribed to the density of the gel texture, a result of the speed of protein aggregation and calcium recovery.
AB - Heat and acid-induced milk gels do not melt or flow upon heating and thus show great potential as a dairy-based protein source for cooking, e.g. for stews. Understanding how processing, e.g. acidification, affects the cooking behavior of these gels is therefore of great industrial interest. The cooking integrity of gels produced by rapidly acidifying milk using citric acid at temperatures of 60, 75, and 90 °C, was determined by analyzing composition, texture, and spatial water distribution before and after cooking. Increasing the acidification temperature from 60 to75 °C resulted in a significant reduction of yield, due to decreased moisture content of the gels. With increasing content of solids, the gels grew harder and denser, as observed by texture profile analysis and low-field Nuclear Magnetic Resonance. Upon cooking the 60 °C gel lost a significant amount of moisture, due to the contraction of the porous protein network. The more compact gels, prepared at 75 and 90 °C, did not lose mass indicating good cooking integrity, i.e. a gel that keeps its structure during cooking. Acidification temperature thus greatly influenced cooking integrity. The effect was mainly ascribed to the density of the gel texture, a result of the speed of protein aggregation and calcium recovery.
KW - Acidified milk
KW - Calcium
KW - Coagulation
KW - Cooking integrity
KW - Heat and acid-induced milk gels
KW - LF-NMR
U2 - 10.1016/j.foodres.2023.112846
DO - 10.1016/j.foodres.2023.112846
M3 - Journal article
C2 - 37254420
AN - SCOPUS:85153092044
VL - 169
JO - Food Research International
JF - Food Research International
SN - 0963-9969
M1 - 112846
ER -
ID: 347893000