The determination of 5alpha-androstane-3alpha, 17beta-diol in human plasma by radioimmunoassay.

Antibodies have been raised in rabbits against 3alpha, 17beta-dihydroxy-5alpha-androstane-6-0-carboxymethyloxime coupled with Cohn's fraction IV-4. The antiserum exhibited significant cross reactions with 5beta-androstane-3alph1, 17beta-diol, 5alpha-dihydrotestosterone, and testosterone. No cross reactions were observed with 5alpha-androstane-3beta,17beta-diol and 5-androstene-3beta,17beta-diol.

Clinical evaluation of a root canal cement that contains paraformaldehyde.

The effectiveness of a Formalin-containing root canal cement in endodontic treatment is evaluated. A total of 76 teeth from 73 patients was used in a series of root canal treatments in which it was impossible to fill the canal to the apex; results of treatment were compared with the results in teeth with conventionally filled canals. The evaluation of the results shows Formalin-containing cements to have a useful place in endodontic therapy.