Abstract
A method is described in which the specific action of thyroid upon tadpoles is used to assay the physiological value of commercial thyroid preparations.
Of seven products purchased in retail drugstores, two indicated about 20 per cent more activity than a standard preparation, two were equal in value to the standard, one somewhat more than 50 per cent of the standard, one less than 50 per cent, and one was a practically worthless preparation—being only about 10 to 20 per cent of the value of the standard.
Footnotes
- Received July 20, 1917.
JPET articles become freely available 12 months after publication, and remain freely available for 5 years.Non-open access articles that fall outside this five year window are available only to institutional subscribers and current ASPET members, or through the article purchase feature at the bottom of the page.
|
Log in using your username and password
Purchase access
You may purchase access to this article. This will require you to create an account if you don't already have one.