EN
The degradation of lignocellulose to provide fuels and chemicals is a subject of intensive investigation.THis paper cutlines the current biotechnological methods and discisses the problems of cellulose and hemicellulose bioconversion to ethanol.The relationships between physical and chemical properties of lignocellulose and enzymatic hydrolysis are shown.The applications of genetic engineering to Trichoderma resei, Saccharomyces cerevisiae and other organisma increase the yield of ethanol from lignocellulosics material is described.