In a comparative study, 9 healthy volunteers ingested a single oral dose of 400 mL red grape juice or red wine with dose-adjusted anthocyanin content ( $283.5$ mg or $279.6$ mg, resp.) in crossover. The content of anthocyanin glucosides was detected in plasma and urinary excretion. Additionally, the plasmatic antioxidant activity was assessed after intake. Based on the plasma content, biokineti...

Tracer studies in healthy volunteers using stable isotopes of ruthenium were performed with the objective of extending the limited knowledge about the biokinetics of the radionuclides of this element. Tracer solutions were prepared starting from metallic ruthenium powders enriched in either Ru or Ru (isotopic enrichment ca. 98%). Tracer administration was followed by the collection of blood and...

The thyroid biokinetic model of radioactive I-131 was re-evaluated using a refined nine-compartmental and applied to twelve cancer patients. In contrast the simplified four-compartmental regulated by ICRP-56 report, revised included nine compartments specified in ICRP-128 namely, oral, stomach, body fluid, thyroid, whole body, liver, kidney, bladder, remainder (i.e., minus kidney bladder). A se...

The goal of this study was to identify bacterial populations that assimilated methanol in a denitrifying sequencing batch reactor (SBR), using stable isotope probing (SIP) of (13)C labeled DNA and quantitatively track changes in these populations upon changing the electron donor from methanol to ethanol in the SBR feed. Based on SIP derived (13)C 16S rRNA gene clone libraries, dominant SBR meth...

The decay characteristics of 90Sr-90Y ensure that the mother and daughter nuclides exist in radioactive equilibrium, unless they get discriminated on the basis of their chemical properties, as it happens during metabolism. Although bone is the ultimate organ of deposition, the two nuclides arrive at this target organ over different biokinetic pathways. As 90Y is not excreted, it goes through tr...

The roles of subcellular distribution on silver (Ag) accumulation and elimination in the green mussel Perna viridis collected from 2 hydrographical zones (harbour vs. estuarine) in Hong Kong during 3 different seasons were investigated. Ag concentration and biokinetics varied widely between the 2 zones, but were less variable among the different seasons (pre-wet, wet and dry). The harbour popul...