Lubricating properties of human whole saliva as affected by β-lactoglobulin

摘要: Abstract The effect of β-lactoglobulin (β-LG) at pH 3.5 and 7.0 on lubricating property saliva as related to astringency perception was investigated using tribology. Saliva adsorbed onto surfaces a rotating poly dimethylsiloxane (PDMS) ball disc form film under conditions that mimic the rubbing contacts in oral cavity ( Bongaerts, Rossetti, & Stokes, 2007 ) lubricity films upon exposure astringent compounds measured. While addition non-astringent β-LG slowly increased friction between tribopair surfaces, rapidly coefficients saliva, similar other (epigallocatechin gallate alum). This supports hypothesis arises from loss lubrication which is agreement with well-accepted model polyphenols. Increasing concentration (0.5–10% w/w) caused rapid increase coefficient; however, highest protein concentration, coefficient, although higher than observed for water, below values lower concentrations. suggests static tribology testing different dynamic in-mouth system such simple relationship sensory cannot be found all conditions.