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The Role of Wheat and Egg Constituents in the Formation of a Covalent and Non‐covalent Protein Network in Fresh and Cooked Egg Noodles
Author(s) -
Lambrecht Marlies A.,
Rombouts Ine,
Nivelle Mieke A.,
Delcour Jan A.
Publication year - 2017
Publication title -
journal of food science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.772
H-Index - 150
eISSN - 1750-3841
pISSN - 0022-1147
DOI - 10.1111/1750-3841.13558
Subject(s) - egg white , yolk , food science , chemistry , starch , covalent bond , disulfide bond , absorption of water , biochemistry , biology , botany , organic chemistry
Abstract Noodles of constant protein content and flour‐to‐egg protein ratio were made with whole egg, egg white, or egg yolk. The optimal cooking time, water absorption, and cooking loss of salted whole egg noodles was respectively lower and higher than of egg white and egg yolk noodles. However, cooked whole egg noodles showed the best Kieffer‐rig extensibility. Differences in noodle properties were linked to protein network formation. Disulfide bonds in whole egg noodles developed faster and to a larger extent during cooking than in egg yolk noodles but slower and to a lower extent than in egg white noodles. The balance between the rate of protein cross‐linking and starch swelling determines cooked noodle properties. Ionic and hydrophobic protein interactions increase the optimum cooking time and total work in Kieffer‐rig extensibility testing of fresh noodles. Hydrogen bonds and covalent cross‐links are probably the main determinants of the extensibility of cooked noodles.