Biological Activities of Polyphenols from Grapes

The dietary consumption of grape and its products is associated with a lower incidence of degenerative diseases such as cardiovascular disease and certain types of cancers. Most recent interest has focused on the bioactive phenolic compounds in grape. Anthocyanins, flavanols, flavonols and resveratrol are the most important grape polyphenols because they possess many biological activities, such as antioxidant, cardioprotective, anticancer, anti-inflammation, antiaging and antimicrobial properties. This review summarizes current knowledge on the bioactivities of grape phenolics. The extraction, isolation and identification methods of polyphenols from grape as well as their bioavailability and potential toxicity also are included

GENERALIZED CHARACTERISTIC CLASSES OF LAGRANGE MANIFOLDS AND CANONIC COORDINATES ON ORBITS OF COADJOINED LIE GROUPS REPRESENTATION

The work has been devoted to the study of the properties in the Lagrange foliations given by a completely intergated Hamiltonian system. The generalization of the conception of the Maslov-Arnald-Trofimov classes determined by means of the metric-simplectic manifold structrure which has been used for study of the intergated Hamiltonian systems has been found. The global canonic coordinates for some orbits of the coadjoined representation of the Borel Lie groups have been constructed. The reconstructions of the Liouville rings have been studied, the classification of the orbits for adjoined and coadjoined representation of some Lie groups has been given. The results can find application in the theory of Lagrange foliations, theory of groups and Lie algebrasAvailable from VNTIC / VNTIC - Scientific & Technical Information Centre of RussiaSIGLERURussian Federatio

Experimental Evidence for Mobility/Immobility of Metals in Peat

The biogeochemical cycles of most toxic metals have been significantly altered by anthropogenic activities. Anaerobic, rain-fed organic soils are believed to record historical changes in atmospheric pollution. Suspected postdepositional mobility of trace elements, however, hinders the usefulness of peat bogs as pollution archives. To lower this uncertainty, we quantified the mobility of six trace metals in peat during an 18-month field manipulation. A replicated, reciprocal peat transplant experiment was conducted between a heavily polluted and a relatively unpolluted peatland, located 200 km apart in the Czech Republic (Central Europe). Both peatlands were Sphagnum-derived, lawn-dominated, and had water table close to the surface. A strikingly different behavior was observed for two groups of elements. Elements of group I, Fe and Mn, adjusted their abundances and vertical patterns to the host site, showing an extremely high degree of mobility. In contrast, elements of group II, Pb, Cu, Zn, and Ti, preserved their original vertical patterns at the host site, showing a high degree of immobility. Our experimental results suggest that not just lead, but also copper and zinc concentration profiles in peat are a reliable archive of temporal pollution changes within a wide pH range (2.55.8).JRC.E.5-Nuclear chemistr