Water Dynamics in Whey-Protein-Based Composite Hydrogels by Means of NMR Relaxometry

ÖZEL B., Kruk D., Wojciechowski M., Osuch M., Oztop M. H.

INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES, cilt.22, sa.18, 2021 (SCI-Expanded) identifier identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 22 Sayı: 18
  • Basım Tarihi: 2021
  • Doi Numarası: 10.3390/ijms22189672
  • Dergi Adı: INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, CAB Abstracts, EMBASE, Food Science & Technology Abstracts, MEDLINE, Veterinary Science Database, Directory of Open Access Journals
  • Anahtar Kelimeler: nuclear magnetic resonance, relaxation, hydrogels, whey protein, diffusion, dynamics, ANTHOCYANINS, RELAXATION, RELEASE, GUM, PERSPECTIVES, DIFFUSION, KINETICS, RHEOLOGY, DIETARY
  • Orta Doğu Teknik Üniversitesi Adresli: Evet

Özet

Whey-protein-isolate-based composite hydrogels with encapsulated black carrot (Daucus carota) extract were prepared by heat-induced gelation. The hydrogels were blended with gum tragacanth, pectin and xanthan gum polysaccharides for modulating their properties. H-1 spin-lattice relaxation experiments were performed in a broad frequency range, from 4 kHz to 30 MHz, to obtain insight into the influence of the different polysaccharides and of the presence of black carrot on dynamical properties of water molecules in the hydrogel network. The H-1 spin-lattice relaxation data were decomposed into relaxation contributions associated with confined and free water fractions. The population of the confined water fraction and the value of the translation diffusion coefficient of water molecules in the vicinity of the macromolecular network were quantitatively determined on the basis of the relaxation data. Moreover, it was demonstrated that the translation diffusion is highly anisotropic (two-dimensional, 2D).