Premium
Moisture‐Absorption and Water Dynamics in the Powder of Egg Albumen Peptide, Met‐Pro‐Asp‐Ala‐His‐Leu
Author(s) -
Yang Shuailing,
Liu Xuye,
Zhang Mingdi,
Lin Songyi,
Chen Feng
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 - 10.1111/1750-3841.13573
Subject(s) - moisture , absorption of water , chemistry , absorption (acoustics) , proton nmr , kinetics , peptide , materials science , analytical chemistry (journal) , chemical engineering , chromatography , organic chemistry , biochemistry , physics , quantum mechanics , engineering , composite material
Moisture absorbed into the powder of Met‐Pro‐Asp‐Ala‐His‐Leu (MPDAHL)—a novel egg albumen antioxidant peptide—profoundly affects its properties. In this study, we elucidated water dynamics in MPDAHL using DVS, DSC, and low‐field 1 H NMR. Based on the DVS data, we found that MPDAHL sorption kinetics obey a parallel exponential model. DSC results indicated that both water and heating could change the microstructure of MPDAHL. The T 2 parameters of NMR reflected the different phases of moisture absorption revealed that there were 4 categories of water with different states or mobility in the MPDAHL during the moisture absorption process. The fastest fraction T 2b mainly dominated the hygroscopicity of MPDAHL and the absorbed water significantly changed the proton distribution and structure of MPDAHL. Thus, this study shows that DVS, DSC, and low‐field 1 H NMR are effective methods for monitoring water mobility and distribution in synthetic peptides. It can be used to improve the quality assurance of functional peptides.