New functional polymers obtained by amination of PVC

A new procedure for introduction of aromatic diamines into polymer, in particular into poly(vinyl chloride) (PVC) molecule, was developed. Produced materials have attractive properties such as combination of good film-forming, coating and adhesive features (especially adhesion to hard-to-adhere substrates, as glass) and functionalization possibilities. Free pendent amine groups enable nucleophilic additions with fullerene molecule C-60, for creating especial properties of such a film

USE OF WATER RESOURCES FOR IRRIGATION IN TERMS OF THE COMPETITIVENESS OF AGRICULTURE

Serbia has favorable natural resources for successful agricultural production, except the amount of precipitation and its schedule during the vegetation period, which is a limiting factor for high yield and stable production. In such conditions, irrigation increases yield up to two times, and also stabilize the production which contributes to more productive use of natural resources and increases the competitiveness of agriculture. Drought, in more or less intensity, is expressed in about 80% of years when the loss of production in relation to irrigation amounts from 50% up to 80%, or the years with favorable conditions for Crop production. In addition to increasing yield, the irrigation contributes to intensify agricultural production, allows the change of the seed time structure in favor of high-cumulative plant species, production of two harvests per year etc. For this reason, the results of continuing research in use of water resources for irrigation are presented, so as their effect on the yield in farming and vegetable production and contribution to competitiveness of agriculture in relation to the other economic sectors