1. Dep. of Environmental Engineering; Democritus Univ. of Thrace, Lab. of Solid and Hazardous Waste Management; Xanthi 67100 Greece
2. Dep. of Biochemistry-Biotechnology; Univ. of Thessaly; Ploutonos 26 & Aiolou Str. Larisa 41221 Greece
3. Aristotle Univ. of Thessaloniki, School of Agriculture; Lab. of Pesticide Science; Thessaloniki 54124 Greece
4. Aristotle Univ. of Thessaloniki, School of Agriculture; Lab. of Agronomy; Thessaloniki 54124 Greece