Biochemistry and physiology of cerambycid beetle family, especially of Morimus funereus. Purification and characterization of enzymes (especially: leucyl aminopeptidases, amylases, invertase and glucosŐ oxidase) from various sources. Examination of enzyme structures and their interactions with other proteins (antibodies, lectins, enzymes and enzyme inhibitors). Improvement of micropreparative techniques for protein purification, enzyme mapping (chemical and enzymatic) and development of zymogram procedures. Enzyme immobilization techniques (using natural, synthetic and composed materials) and their use in continual substrate biotransformations (bioreactors) and biosensors. Chemical modifications of proteins; examination of effects of modification on the structure and function of proteins. Immunochemistry. Application of biotechnology in bioremediation. Bioethanol. Biodiesel. Renewable natural materials as a sources of new products. Food chemistry and biochemistry. Flavours. Connection between chemistry of natural products with food chemistry and natural food contaminants.