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This study investigated changes in carbon (C) and nitrogen (N) concentrations in the three components of the forest ecosystem (leaves, bark and soil) along an altitudinal gradient in the temperate forests of Romania. The properties and processes within the forest ecosystem are influenced by altitude. The leaves, litter and soil are important in the good development of the ecosystem and in the cycle of the elements. Plants extract the nutrients necessary for life and growth from the soil in which they carry out the...

Residues of pesticides and HM, used in bees care or in crop fields, have negative effects on the health of bees and humans and of the antimicrobial properties of the honey. Investigation of HM and pesticides is vital, since the use of chemical solutions has -rise up- significantly. Our aim was to investigate whether the level of contaminants in honey (Fe, Zn, Pb, Cu, Cd, As, using GC/ECD and GF-AAS) and pesticides: ?-HCH, ?-HCH, ? -HCH, aldrin, dieldrin, endrin, DDE, DDD, and DDT, alpha -Endosulfan, carbofuran, pi...