Speed of ultrasound and internal pressure of 1,2-propanediol, 1,3-propanediol, 1,2-butanediol, and 1,3-butanediol at the temperatures ranging from 293.15 to 318.15 K and pressures up to 101 MPa are analyzed and discussed in terms of molecular structure and ability to form inter- and intramolecular hydrogen bonds.
Concentratin of total mercury was determined in muscle tissue of cod Gadus morhua, herring Clupea harengus, eel Anguilla anguilla, calpout Zoarces viviparus, perch Perca fluvitalis, pikeperch Stizostedion lucioperca, sand eel Hyperoplus lanceolatus, round goby Negobius melanostomus, brown trout Salmo trutta, trout Salmo gairdneri, flounder Platychtis flesus, turbot Psetta mazima, smelt Osmerus eperlanus and sculpin Cottus scorpius caught in the Gulf of Gdansk in 1986-1993.The measurements of mercury concentrations were performed by the method of cold vapour atomic absorption spectrmetry (CV-AAS), after wet digestion of samples with concentrated nitric acid.The highest mean concentration of mercury was found in eelpout, the lowest one in pikeperch.The possitive linear correlations has been found between the body length and mercury concentration in perch, eelpout, sand launce and flounder.