CHARACTERISTICS OF DAIRY FARMS IN THE NORTH-EASTERN PART OF ITALY: RATIONS, MILK YIELD AND NUTRIENTS EXCRETION

This survey was aimed to evaluate the characteristics of dairy farms in the North- Eastern part of Po valley in terms of ration composition, milk yield and N and P excretions.Eightynine farms, with Italian Holstein Friesian cows, were selected in order to cover different situations in term of farm size and milk yield (MY).MY and quality were obtain

An enantioselective total synthesis il barone wine of the natural amino acid (2S,4R,5R)-4,5-di-hydroxy-pipecolic acid starting from D-glucoheptono-1, 4-lactone is presented.The best sequence employed as a key step the intramolecular nucleophilic displacement by an amino function of a 6-O-p-toluene-sulphonyl derivative of a methyl D-arabino-hexonate