PubMed Health⌕ Search

Biomedical subjects

R E Gorman

Publications and source records attributed to R E Gorman.

12 recordsLinked to original sources
PubMed1997

The relationship between shoe size and mode of delivery.

This study investigates whether a woman with a small shoe size has a higher chance of being delivered by cesarean section. Data on shoe size and mode of delivery were collected by chart review and telephone survey from clients of a freestanding birth center. Purposive sampling was done to include all women transferred and delivered by cesarean section for CPD or FTP, and an equivalent number of women who had a normal spontaneous vaginal delivery. Data on twenty two first time mothers who were delivered by cesarean section and twenty three who delivered vaginally were compared. This study did not find any relationship between small shoe size and cesarean section delivery.

Adolescent↗
PubMed1972

Digitonin effects on photoreceptor adenylate cyclase.

Adenylate cyclase is described in a number of photoreceptor membranes. Vertebrate rod outer segments contain light-regulated cyclase, and light regulation is abolished by digitonin. Disruption of microvilli in cone and rhabdomphotoreceptors is also associated with loss of light regulation and retention of full enzymic activity. The data suggest that inhibitory constraint provides regulation in cyclase systems and that disruption of membrane structure uncouples catalytic and regulatory elements.

Adenylyl Cyclases↗
PubMed1971

Cyclic adenosine monophosphate: function in photoreceptors.

Inactivation of adenylate cyclase in outer segments of retinal photoreceptor cells is proportional to the bleaching of rhodopsin. Membranes of the outer segments also contain a particulate, light-insensitive phosphodiesterase of high specific activity. In electrophysiological experiments, application of cyclic adenosine monophosphate along with a methylxanthine mimics the effects of illumination on the photoreceptor cell of the compound eye of Limulus.

Action Potentials↗
PubMed1971

Adenyl cyclase as a link between photon capture and changes in membrane permeability of frog photoreceptors.

Tomita has shown by electrophysiological measurements that the photoreceptors of the vertebrate retina are depolarized (excited) by darkness and hyperpolarized (inhibited) by light. Excitation is accompanied by an increase, and inhibition by a decrease, in the sodiumion permeability of the receptor cell. The retinal-rod outer segments of the frog contain an adenyl cyclase that is active in darkness and inactivated by light. This cyclase has a specific activity ten-times higher than the activity in previously described tissues. It is suggested that cyclic AMP is an intermediate in the light- and dark-induced changes in sodium permeability in the photoreceptor cell.

Adenine Nucleotides↗