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

Özel, Barış
Wojciechowski, Milosz
Osuch, Maciej
Oztop, Mecit Halil
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).


Water dynamics in eggs by means of Nuclear Magnetic Resonance relaxometry
Kruk, Danuta; Florek-Wojciechowska, Małgorzata; Öztop, Halil Mecit; İlhan, Esmanur; Wieczorek, Zbigniew (2021-06-01)
1H Nuclear Magnetic Resonance relaxometry has been applied to reveal dynamical properties of water molecules embedded into egg yolk and white of three species: turkey, chicken and quail. Two fractions of water molecules, referred to as confined-water and free-water fractions, have been revealed. It has been demonstrated that translation diffusion of the confined-water fraction is three-dimensional. The dynamics of the confined-water has been quantitatively described in terms of diffusion coefficients and ro...
Water-borne and air-drying oil-based resins
Gündüz, Güngör; Khalid, AH; Mecidoglu, IA; Aras, L (Elsevier BV, 2004-04-01)
New water-borne polyurethane resins were produced using maleinized monoglyceride (MMG), hydroxyl-terminated polybutadiene (HTPB), toluene di-isocyanate, and ethylene diamine (EDA). Maleinization was performed in order to insert hydrophilic groups in the fatty acid residues, which were then inserted to the backbone of polyurethane. The MMG was mixed with HTPB in different proportions, and the mixture was used as the polyol part of water-borne polyurethane resin. It was then reacted with toluene di-isocyanate...
Water dispersed epoxy resin for surface coatings
Şen, Evrim; Gündüz, Güngör; Aras, Leyla; Department of Chemical Engineering (2003)
In this research water dispersed epoxy varnishes were produced by reacting solid epoxy resin with ethylene diamine (EDA) and maleinized fatty acids of linseed oil. Maleinized fatty acid (MFA) was produced by the maleinization process, in which, fatty acid and maleic anhydride were reacted under nitrogen atmosphere. Maleinization was performed in order to insert hydrophilic groups to the fatty acid chains, which were then inserted to the backbone of the epoxy resin. This was done to give water dispersibility...
Water-soluble poly(4-styrenesulfonic acid-co-maleic acid) stabilized ruthenium(0) and palladium(0) nanoclusters as highly active catalysts in hydrogen generation from the hydrolysis of ammonia-borane
Metin, Oender; ŞAHİN ÜN, ŞULE; Özkar, Saim (2009-08-01)
Water-soluble poly(4-styrenesulfonic acid-co-maleic acid), PSSA-co-MA, stabilized ruthenium(0) and palladium(0) nanoclusters were for the first time prepared in situ from the reduction of ruthenium(III) chloride and potassium tetrachloropalladate(II), respectively, by ammonia-borane during its hydrolysis at room temperature. PSSA-co-MA stabilized ruthenium(0) and palladium(0) nanoclusters having average particle size of 1.9 +/- 0.5 and 3.5 +/- 1.6 nm, respectively, were isolated from the reaction solution a...
Extraction of Bioactive Compounds from Milled Grape Canes (Vitis vinifera) Using a Pressurized Low-Polarity Water Extractor
Karacabey, Erkan; Mazza, Giuseppe; Bayındırlı, Levent A.; ARTIK, NEVZAT (Springer Science and Business Media LLC, 2012-01-01)
Trans-resveratrol and trans-epsilon-viniferin were extracted from milled grape canes using pressurized low-polarity water. The effects of temperature were significant for both compounds (p a parts per thousand currency signaEuro parts per thousand 0.05): extraction at 160 A degrees C resulted in a 40% loss of trans-resveratrol compared to 95 A degrees C while reduction of trans-epsilon-viniferin at both temperatures remained at 30%. Increasing ethanol concentration from 0% to 25% increased the extraction of...
Citation Formats
B. Özel, M. Wojciechowski, M. Osuch, and M. H. Oztop, “Water Dynamics in Whey-Protein-Based Composite Hydrogels by Means of NMR Relaxometry,” INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES, vol. 22, no. 18, pp. 0–0, 2021, Accessed: 00, 2021. [Online]. Available: https://hdl.handle.net/11511/93962.