Flavonoids are important antioxidants but little is known of their effect in the human body. Cell membranes are the first barrier flavonoids have to pass in order to be absorbed in the body. We followed fluidity of model membranes with four flavonoids and by two methods. We hypothesized that fluidity, which is connected to absorption of a compound, reflects the chemical structure. In the published article we proved the hypothesis and showed that by fluorescence spectroscopy and by electron paramagnetic resonance spectroscopy such changes can be experimentally determined.
COBISS.SI-ID: 3725176
The rate of peroxyl radical scavenging in oil-in-water emulsion and the rate of radical scavenging in polar homogenous medium were estimated for some phenolic acids. It was shown that kinetic approach may give more comprehensive understanding about the behavior of antioxidants than determination at a fixed point. Expression of the results in terms of the kinetic approach does not take into account the activity of an antioxidant but also provide information on how quickly the antioxidant acts.
COBISS.SI-ID: 3731320
D-(-)-Quinic acid is widespread in the plant kingdom and it occupies a predominant position among the metabolites originating from D-glucose. The apparent molar volume of quinic acid and sodium quinate in water were determined from the density data of solutions. From the limiting apparent molar volume of the quinic acid and the quinate ion the limiting volume change caused by ionization of quinic acid was calculated. From the temperature dependence of density data the coefficients of thermal expansion of these solutions were determined.
COBISS.SI-ID: 3806584
Hyperthermophilic archaea Aeropyrum pernix was grown at three different pH values. The extracellular proteins were separted by 2-D electrophoresis and identify by MS.
COBISS.SI-ID: 3750008
It was shown in this review that biosensors have increasing role in food analysis. The method is more simple, less time consuming and requires less sample preparation compared to different chromatographic methods that are used to identify and quantify particular polyphenols present in food samples. In spite of the great number of publications on polyphenol biosensors, they didn’t still find the way to the market.
COBISS.SI-ID: 3841912