We measured the contamination levels with a broad gamma of pesticides in water, soil and foodstuff from Central Romania. Organochlorine, triazine, carbamate, phenoxy acid and organophosphorus pesticides were analyzed in water, soil and foodstuffs samples. Among the most detected pollutants, we found pesticides prohibited in the European Union, such as isomers of hexachlorocyclohexane (HCHs) and DDT, together with their metabolization products. Detectable

During the survey, we measured the contamination levels with a broad variety of pesticides in soil samples collected from Central Romania. Organochlorine, triazine, car-bamate, phenoxy acid and organophosphorus pesticides were analyzed. Among the most detected pollutants, we found pesticides prohibited in the European Union, such as isomers of hexachlorocyclohexane (HCHs) and DDT, together with their metabolites. In step two, we modelled the complexation

he effects of different plant extracts on apple aphid (Aphis pomi) mortality were compared under laboratory conditions. The apple aphid is one of the most resistant pests against insecticides throughout the Central Europe. The selection of insecticide-resistance pest biotypes can be delayed by decreasing the frequency and intensity of genetic selection. This might be accomplished by applying insecticides only when and where absolutely necessary and

Apple scab, caused by Venturia inaequalis, is one of the most serious diseases of apple throughout the Europe. In our experiments the ascosporous mortality were compared using different plant extracts. These were: Artemisinin 3% and 6% (Artemisia annua), Chelidonine 3% and 6% (Chelidonium maius), Menthol 3% and 6% (Mentha piperita), Populin 3% and 6% (Populus nigra), Linalool + Linalyl acetate + Linalyl acetate 3% and 6% (Salvia sclarea), Thymol

Chromatographic separation of enantiomers to assure or enhance chiral purity is of considerable importance and can be achieved by the use of selectors of great structural variety. Cyclodextrins are an important and frequently used class, and they are multimodal selectors since multiple chiral interactions are possible by very different mechanisms. Here, the results of a preliminary examination on the possible value of computational molecular modeling

Complexing Chem. or chelating agents are used in plant cultivation to avail of different phytobiologically useful macro- and microelements. The great majority of the traditional chelators (e.g. EDTA) are, however, essentially non-biodegradable, which can lead to environmentally incalculable consequences. In the present work we sum up our results and conclusions on the modeling of the structure-property relationships of some biodegradable complexes

Sixteen new sulphonamides with acridonic, acridanic and acridinic nucleus were synthesised, in which the sulphonamidic group appears in positions 1, 2, 3 and 4. We proved that in the case of 2-nitroacridone synthesis, by ring closure of 4-nitrodiphenylamine-2-carboxylic acid, working in presence of sulphuric acid, sulphonation takes place. To reduce some nitroacridones we used hydrazine hydrate in the presence of Ni from formiate and Ni Raney, a

Sulphonamides represent, except for antibiotics, the class of substances, which had scored the greatest chemiotherapeutical success, because of their high antimicrobian, diuretic and hypoglycemic activity. The data from reference materials show that there are known only sulphonamides derived from 1,2,3,4 and 9-aminoacridine, in which the amino group from the sulphonamide remainder, -essential for the antimicrobial activity- is absent. Therefore,