MODIFICATIONS of tile automated fluorirnetric pilellylalaIllne proedure (1), which may prove advantageous to those analyzing tile blood of newborn babies for phenylalanine concentration, have been studied and are as follows: 1. A 10-20 times less expensive dipeptide, glycyl-L-leucine ((enera1 Biochemicals, Chagrin Falls, Ohio, Mann Research Laboratories, Inc., New York, N. Y., and Sigma Chemica...

The samples of human gastric juice were collected from patients of the University Hospital and the Veterans’ Administration Hospital in Oklahoma City, Oklahoma. The secretion of gastric juice was stimulated by injecting intravenously 10 units of insulin immediately before starting each collection. The gastric juice was collected in jars, cooled to 4”, and kept at this temperature. Samples from ...

Twenty-five isolates of nutritionally variant streptococci submitted to the Streptococcus Laboratory of the Center for Disease Control over a 2-year period were tested for growth requirements and for biochemical reactions. After they were recovered from storage in blood at -170 degrees C, all isolates grew within 48 h in both thioglycollate broth and Todd-Hewitt broth supplemented with 0.001% p...