2.3. Chemical Composition Analysis

UV-Vis spectrophotometer SF-200 (OKB Spectr, Saint Petersburg, Russia) was used for spectrophotometric quantitative determination of total protein (as mg/g BSA equivalents) [17], total soluble carbohydrates (as mg/g glucose equivalents) [18], polysaccharides (as mg/g glucose equivalents) [19], phenolics (as mg/g gallic acid equivalents) [20], flavonols (as mg/g hyperoside equivalents) [21], flavanols (as mg/g taxifolin equivalents) [22], catechins (as mg/g (+)-catechin equivalents) [23], and procyanidins (as mg/g procyanidin B₁ equivalents) [24] in R. adamsii extracts. All the analyses were carried out five times and the data were expressed as mean value ± standard deviation (S.D.).