Abstract 455

Carlsson,-R; Jokl,-L; Amorim,-C

CETEC, Belo Horizonte, Minas Gerais, Brazil.

Nutrition-Reports-International. 1984, 30: 2, 323-329; 14 ref.

Leaf protein was extracted from the tropical C4 grass Pennisetum purpureum (4 weeks regrowths) to produce leaf protein concentrate (LPC). The extracted protein was precipitated by Ca2+-ions (0.1% of extract, pH 5), hot vinasse (pH 4, vinasse 60øC; 35ø after mixing), acid whey (pH 4.5), ethanol (30% of extract), acid (HCl, pH 4) and heat (pH 6, 75ø). The wet LPC was washed twice (pH 4), except for one heat-precipitated LPC. Proximate composition of LPC was moisture 3.4 to 9.9, crude protein 25.8 to 49.0, crude fat 2.8 to 16.3, ash 2.3 to 26.6 and crude fibre 2.8 to 13.9% of dried LPC. The highest protein content was for LPC precipitated by acid, ethanol and heat; values for LPCs precipitated with Ca2+ and whey were low.