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Your search keyword '"Human whole saliva (HWS)"' showing total 3 results
Start Over Descriptor "Human whole saliva (HWS)" Topic saliva
3 results on '"Human whole saliva (HWS)"'

1. Characteristics of saliva films adsorbed onto different dental materials studied by QCM-D.

Author

Barrantes, Alejandro, Arnebrant, Thomas, and Lindh, Liselott

Subjects
*SALIVA, *DENTAL materials, *ADSORPTION (Chemistry), *QUARTZ crystal microbalances, *HYDROXYAPATITE, *SURFACE chemistry, *VISCOELASTIC materials, *STERILIZATION (Disinfection)
Abstract

Highlights: [•] Saliva adsorption onto different materials was studied by means of QCM-D. [•] Film thickness was lowest for hydroxyapatite surfaces. [•] Viscoelastic properties depend on the substrate and saliva type. [•] SDS elution suggests different interaction mechanisms depending on the surface. [Copyright &y& Elsevier]

Published
2014
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2. Effect of tea polyphenols on the dilational rheology of human whole saliva (HWS): Part 2, polyphenols–HWS interaction

Author

Francesca Ravera, Damiano Rossetti, and Libero Liggieri

Subjects
Astringency, Surface Properties, Dilational rheology, Chemical structure, Molecular Conformation, Mixed kinetic model, Human whole saliva (HWS), chemistry.chemical_compound, Colloid and Surface Chemistry, Rheology, Surface elasticity, Humans, Phenols, Physical and Theoretical Chemistry, Whole saliva, Saliva, Chromatography, Tea, Kinetic model, Polyphenols, food and beverages, Surfaces and Interfaces, General Medicine, Kinetics, chemistry, Polyphenol, Salivary Proteins, Biotechnology
Abstract

In the second part of this communication we screen a few tea polyphenols for their ability to interact with pre-adsorbed salivary proteins at the air-liquid interface. Using interfacial dilational rheology characterisation, we measure the variation in surface elasticity of a pre-adsorbed salivary film after exposure to tea polyphenols solutions in order to probe the degree of mutual interaction. We observe that this interaction with salivary proteins varies according to the chemical structure and degree of polyphenols complexity (number of phenols rings). The evolution of the salivary film after exposure to polyphenol solutions is characterised through surface dilational response to appropriate frequency modulation and the results are analysed using a general mixed kinetic model, which reproduces correctly the experimental data except for the galloylated theaflavins. © 2013 Elsevier B.V.

Published
2013

3. Effect of tea polyphenols on the dilational rheology of human whole saliva (HWS): Part 1, HWS characterization

Author

Francesca Ravera, Damiano Rossetti, and Libero Liggieri

Subjects
Male, Saliva, Surface Properties, Dilational rheology, Molecular Conformation, Surface rheology, Oral health, Viscoelasticity, Mixed kinetic model, Human whole saliva (HWS), Mouthfeel, Colloid and Surface Chemistry, Rheology, Humans, Food science, Physical and Theoretical Chemistry, Whole saliva, Chromatography, Tea, Chemistry, Polyphenols, Surfaces and Interfaces, General Medicine, Polyphenol, Biotechnology
Abstract

Human whole saliva (HWS) is a physiological secretion that performs a number of essential functions including protection of oral health, lubrication of mouth tissues and food pre-digestion. The complexity of the saliva proteome reflects the unique physiochemical functionality of this biofluid. In addition, saliva influences the transduction of aroma, taste and tactile (mouthfeel) perceptions through the interaction with food and beverages. This work, which is presented as two distinct contributions, reports on the extensive interfacial properties characterization (air-liquid) of saliva either alone or after exposure to tea polyphenols. This first part discusses the complex nature of the salivary film in terms of kinetic and viscoelastic (dilational surface rheology) properties. The formation of the surface film is analyzed with time and explained in terms of the progressively irreversible adsorption of protein fractions of larger molecular weight. The viscoelastic response to appropriate frequency modulation is modelled using a general mixed kinetic model, which satisfactorily reproduces the experimental data in better agreement than the traditional Lucassen diffusive model. © 2013 Elsevier B.V.

Published
2013

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