Several methods for reducing the methanol content of plum brandies were tried: possibilities for its reduced forming during fruit must alcohol fermentation, and employing effective and rational methods in order to decrease the already existing amount of methanol by applying demethanolization column. Apart from numerous valued components, plum brandy also contains some undesirable ingredients, among which methanol has a special place.

The mechanism of leaf growth inhibition was investigated in eight maize genotypes differing in drought resistance and maturity groups. In controlled conditions the effects of drought, nitrogen deficiency, pH and ABA on leaf growth were investigated. In soil drying experiment measurements of water potential and its components and leaf growth and development parameters were carried out.