Steroid Synthesis Patterns in Cultured Fetal and Neo-Natal Hamster Adrenal Glands

The observation of diurnal biological rhythms was first recorded early in the eighteenth century, but it was 200 years before any detailed investigation of the nature of daily plant and animal rhythms was undertaken (Burning, 1964). | As a more virgorous study of biological rhythms developed, it became apparent that the daily rhythmic activity of organisms fell mainly into two categories. The rhythms were either exogenous or endogenous in origin (Frisch, 1960; Burning, 1964; Wolf, 1962; Sollberger, 1965). | Exogenous rhythms in living systems depend on the cyclic variations in light, temperature and other geophysical influences. If a plant or animal were placed in a controlled environment where all external environmental circumstances were relatively constant, the rhythmic behavior of the organism would tend to diminish in time.

Grantor dc:publisher

Creighton University

Year dc:date.issued

1966

Author dc:creator

• Keil, Lanny Charles

Advisor dc:contributor.advisor

• Andrews, Richard V.

Statement dc:rights

• A non-exclusive distribution right is granted to Creighton University and to ProQuest following the publishing model selected above.

Language dc:language.iso

en_US

Handle dc:identifier.uri

http://hdl.handle.net/10504/120904

OAI identifier oai:identifier

oai:cdr.creighton.edu:10504/120904