Search PubMed⌕ Search

Biomedical subjects

K J Ryan

Publications and source records attributed to K J Ryan.

At least 235 records · Page 13Linked to original sources
PubMed1972

Prostaglandins and their effects on human placental adenyl cyclase.

Prostaglandins increased adenyl cyclase activity in human term placental homogenates in a dose-dependent manner during 10-min incubation periods. The potency of the prostaglandins examined was demonstrated to be in the ascending order, prostaglandin F(1alpha) < A(2), F(2alpha), B(2) < A(1) < E(2) < E(1). Although no specific trophic or regulating factors for placental function have been described as yet, it is possible that prostaglandins which are synthesized in decidual tissue could play such a physiological role.

Adenylyl Cyclases↗
PubMed1970

Stability of antibiotics and chemotherapeutics in agar plates.

The stability of chemotherapeutic agents incorporated into agar plates was studied by comparison of minimum inhibitory concentrations on fresh and stored plates and by direct bioassay of the chemotherapeutic agar plates. Plates were stored in sealed bags at 4 C. No loss of bioactivity was demonstrated after 30 days of storage in plates containing methicillin, erythromycin, cephalothin, tetracycline, chloramphenicol, kanamycin, streptomycin, polymyxin B, or nalidixic acid. Penicillin G, ampicillin, and nitrofurantoin showed statistically significant losses of activity after 4 weeks. None of the chemotherapeutics tested showed significant loss in activity after 1 week.

Agar↗