Cheese whey was chemically pretreated and subjected to one of nine semi-pilot scale, physical pretreatment modifications involving various combinations of centrifugal clarification (CC) and/or microfiltration (MF) to remove residual lipids and phospholipoprotein complexes. Two pretreatment modifications were most effective for producing whey with least turbidity and lowest lipid and phosphoIipid contents. Whey given these two pretreatments provided highest ultrfiltration (UF) membrane flux rate and upon drying of the UF retentate resulted in the most highly functional WPCs in terms of solubility, foam expansion, emulsifying activity and gelation.

five titrations. The effect of trace amounts of oxygen is clearly shown by this lower result.This procedure has been used for the determination of plutonium in high purity plutonium metal samples, alloys with noninterfering metals such as iron, and nitric or hydrochloric acid solutions. About 15 determinations may easily be performed per day. Using an automatic heating-cycle controller for the two evaporations with perchloric acid, the operator time per determination should be greatly reduced. After the 31, 1138 (1959).

No abstract

Describes procedures for and examples of circular-paper chromatography.

Tetrahymenapyriformis strain E was used to compare the nutritive value of globin before and after peptic hydrolysis. In addition, the nutritive value was determined for shy protein, peanut protein, casein and gluten both as a sole source of nitrogen and combined with globin in isonitrogenous amounts. The nutritive value of casein ranked the highest followed by peanut protein, soy protein, globin and gluten. Peptic hydrolysis of globin, gluten and soy protein increased the cellular growth of T. pyriformis while hydrolysis had no effect on cellular growth when casein or peanut protein were used as the amino acid source. The ranking of nutritive values after peptic hydrolysis was as follows: casein, soy protein, gluten, peanut protein and globin. This indicates a difference in the availability of amino acids from some intact proteins. The nutritive value of globin was increased by blending the globin with other proteins. The Tetrakymena assay with peptic hydrolysis is an excellent procedure for the rapid screening of the quality of individual proteins or blends.