Macronutrient and heavy metal accumulation in a Greek fir ecosystem of Taygetos mountain in Peloponnese
© Aristotle University of Thessaloniki (6/2009)
Macronutrient and heavy metals accumulation in the forest floor and soil were investigated in three undisturbed natural forest sites of Greek fir ecosystem of Taygetos mountain in Peloponnese. Dry weight and organic matter of the forest floor ranged greatly, from a high of about 67 and 57 t/ha under to a low of 27 and 14 t/ha respectively.

Environmental fate and persistence of the organophosphorus pesticide disulfoton in different types of natural water
© Aristotle University of Thessaloniki (6/2009)
Degradation kinetics of hydrolysis and photolysis pathways of the organophosphorus pesticide disulfoton (O,O-diethyl S-[2-(ethylthio)ethyl] phosphorodithioate) in several types of natural water were investigated. Not degraded quantity of the compound was determined by GC-NPD means.

Peroxyacetil Nitrate (PAN) in urban atmosphere: levels and behavior
© Aristotle University of Thessaloniki (6/2009)
The peroxyacetil nitrate (PAN) is the most characteristic photoxidant, which is produced from NOx and reactive hydrocarbons in photochemical smog. In this paper daily PAN temporal evolution are compared with the Ox variable in different meteorological conditions.

Investigation on the behavior of pesticides in atmosphere
© Aristotle University of Thessaloniki (6/2009)
This paper shows an analytical approach based on GC analysis for evaluating the pesticide trend in atmosphere: in particular, the pesticides investigated are dimethoate, carbaryl, phorate, cypermethrin, chloridazon, phenmedipham and fluazifop-p-butyl. For the analytical methodology a linearity response was obtained (r2= 0.9995) in GC-NPD whereas the limits of detection are 0.001 ng μL-1 in GC-NPD with a Relative Standard Deviation below 9.5%. Finally, this approach has been succefully applied to real samples.

Composition and distribution of organochlorine pollutants in the sediments and mussels from the Istanbul Strait (Turkey)
© Aristotle University of Thessaloniki (6/2009)
Organochlorine pollutants are ubiquitous and persistent anthropogenic contaminants in the aquatic environment. Since these compounds have an affinity for particulate matter, they can accumulate in sediments and due to their lipophilic nature they tend to accumulate also in organisms. In this study, sediment and mussel samples from the stanbul Strait were analyzed for indicator and 12 dioxin-like polychlorinated biphenyls (PCBs), 17 dioxins/furans congeners and for organochlorine pesticides (OCs).

Regional differences in trace element concentrations in Anadara spp. Mollusca: Bivalva) collected from the coast of South Vietnam
© Aristotle University of Thessaloniki (6/2009)
We measured accumulation of 21 trace elements in blood cockles, Anadara spp., collected from the South Key Economic Zone, Mekong River Delta (MRD), and Central Coastal Zone (CCZ) in Vietnam. Concentrations of As, Sr, Mo, Sn and Pb were higher in CCZ blood cockle than in those from the other two regions, whereas Hg concentration was elevated in MRD samples.

Application of computer modelling for forecasting of contaminants distribution in soil
© Aristotle University of Thessaloniki (6/2009)
An outlook of various methods of computer modeling application for the analysis and forecasting of contaminants migration in the soil is being discussed. A new mathematical model of contaminants transport in near-surface soil layer under non-isothermal conditions is being proposed. The given model takes into account the soil moisture content change effecting the solute transport and sorption owing to evaporation processes and recondensation of water vapor. The article also covers the possibility of hybrid expert systems (HES) application for solving contaminants migration in the soil. Distinguish structure of HES that includes models hybridization is being proposed. On the basis of given methods and models a new software has been developed.

Prediction of nitrate leaching under different climatic and nitrogen management scenarios
© Aristotle University of Thessaloniki (6/2009)
Prediction of nitrate leaching by using dynamic simulation under different climatic and crop management scenarios is useful in designation strategies to reach agronomic and environmental goals. Nitrate leaching from maize and winter wheat stands on layered sandy and loam soil profiles was studied by simulation, using the Swedish Coupled heat and mass transfer model for soil-plantatmosphere systems (CoupModel).

Preliminary studies on the degradation of a range of pesticides in novel biomixtures using different agricultural by-products as straw substitutes
© Aristotle University of Thessaloniki (6/2009)
Five common ligninocellulosic materials with different physicochemical characteristics were used in novel biomixtures as straw substitutes. The biomixtures formed were treated with a mixture of 9 commonly used pesticides. The degradation of the pesticides as well as some biochemical parameters (total hydrolytic activity, substrate induced respiration, Mn peroxidase and Laccase activity) were measured during the experiment.

The FOOTPRINT software tools: Pesticide risk assessment and management in the EU at different spatial scales
© Aristotle University of Thessaloniki (6/2009)
In the EU-project FOOTPRINT three pesticide risk assessment and management tools were developed, for use at different spatial scales. The three FOOTPRINT tools share the same underlying science, based on the consistent identification of environmental characteristics driving the fate of agriculturally applied pesticides and their interpretation to parameterise state of the art modelling applications thus providing an integrated solution to pesticide risk assessment and management in the EU.

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