HAYS, MCGUIRE. HOOGEVEEN, AND DIEZERAAD are added to 3-mI heparinized plasma
samples in I3-mi well-counter tubes. The mixture isshaken for 30 mm. It is then diluted to a …

1, shaken on a reciprocating shaker for 2 mlii at room temperature and then placed in a
constant-tempera tare witer bath and incubated for 8 mlii at 45 ±1ÂC. After incubation the …

METHOD The method used is essentially that published by Sterling, but with minor
modifications. The necessary materials are I'31-labelled triiodothyronine2(T-3) and an …

MATERIALS AND METHODS Thyroxine(T4), the sodium salt of tetraiodo thyronine, has four
iodine atoms in the 3, 5, 3', 5'positions and over 61. 5% iodine content which renders it a …

RESULTS Table 1 shows the purity of several lots of corn mercial 1251-thyroxine. All but
one (Abbott's Lot# 320) contained less than 3% †251-iodide. The reduction of the …

MATERIALS AND METHODS Test procedure. All reactions are carried out in small plastic
columns containing Sephadex G-25 equilibrated with 0. 1 N NaOH providing a pH greater …

MATERIALS AND METHODS The clinical material consisted of patients on the medical
services of the various hospitals of the Indiana University Medical Center and normal volun …

MATERIALS AND METHODS High-specific-activity 1251-T3 (590 j. tCi/sg) was obtained
from Abbott Laboratories (North Chicago, Ill.). No significant decomposition was observed …

We have reviewed the physiological principles involved in the assessment of thyroid
function by the following methods: 1) protein-bound iodine, 2) butanol-extractable iodine …

The most commonly-used test for determining the serum concentration of thyroid hormones
is the protein-bound iodine analysis (PBI) which measures the serum's entire organic and …