Nursing

Biology

Chromatography

Testosterone (patch)

Alpha (finance)

Endocrinology

Anabolic-Androgenic Steroids

Metabolism

Biochemistry

Paleontology

Construct validity

Nandrolone

Urine

Anabolism

Enzyme

Internal medicine

Hydrolysis

Pharmacology

Horse

Medicine

Chemistry

Enzymatic hydrolysis

Anabolic Agents

Urinary system

Patient satisfaction

Xenobiotica

Abstract1. After intramuscular administration of [4-14C]testosterone to two cross-bred gelded horses, 45% of the radioactivity was excreted in urine in 96 h. Small amounts of urinary activity could still be detected at 200 h.2. Neutral metabolites obtained after both enzyme and acid hydrolysis of urine samples have been investigated by g.l.c.-mass spectrometry.3. 5α-Androstane-3β, 17α-diol was found only in the enzyme-hydrolysable extract and testosterone only in the acid-hydrolysable extract. 5α-Androstane-3β, 17β-diol and 3β-hydroxy-5α-androstan-17-one were found predominantly in the acid-hydrolysable extract.

Studies related to the metabolism of anabolic steroids in the horse: testosterone