The Phosphorus Turnover of Carcinoma of the Human Stomach as Measured with Radioactive Phosphorus.

The Turnover Rate of Phospholipids in the Plasma of the Dog as Measured with Radioactive Phosphorus

1. A method for the determination of turnover time and turnover rate of plasma phospholipid is presented. 2. During the postabsorptive state 5.2 to 8.0 mg. of phospholipid phosphorus are turned over per hour in the plasma of dogs weighing 6-9 kilos. 3. The amount of phospholipid in an organ that is supplied by plasma phospholipid per hour is calculated.

Phosphorus Metabolism of Neoplastic Tissues (mammary Carcinoma, Lymphoma, Lymphosarcoma) as Indicated by Radioactive Phosphorus

In previous studies from these laboratories, radioactive phosphorus was used to determine the rate of phospholipid turnover in 4 types of transplantable tumors: a mammary carcinoma, a lymphoma, a lymphosarcoma, and sarcoma 180 (1, 2 ) . Some distinctive features of the metabolism of these neoplastic tissues were described: (a) the fact that their phospholipid turnover bears a greater resemblanc...

The effects of lipotropic factors on phospholipide turnover in the plasma of normal persons as indicated by radioactive phosphorus.

The action of choline and methionine in preventing or curing the fatty infiltration of the liver which is produced experimentally in animals by low protein diets is believed to result from an increased turnover of phospholipides in the liver (1, 2). Since this organ is the main, if not the sole, source of phospholipides in plasma (3), it would seem that changes in the formation of phospholipide...

Choline and the Prevention of Hemorrhagic Kidneys in the Rat Ii. Phospholipid Turnover Determined with Radioactive Phosphorus

Metabolism of Tissue Cultures

By using radioactive isotopes in tissue cultures, the rate of permeation of substances into cells can be measured independently of concurrent metabolic reactions of these substances. Techniques of obtaining and analyzing data are described. Examples are given using radioactive potassium and phosphorus. Using cultures of chick embryo muscle, turnover time for cell potassium is 6 hours, and for c...