Show simple item record

dc.contributor.authorHemmings, Sarah Nicole Julia
dc.date.accessioned2014-03-03T23:22:03Z
dc.date.available2014-03-03T23:22:03Z
dc.date.issued2005-08
dc.identifier.otherhemmings_sarah_n_200508_ms
dc.identifier.urihttp://purl.galileo.usg.edu/uga_etd/hemmings_sarah_n_200508_ms
dc.identifier.urihttp://hdl.handle.net/10724/22676
dc.description.abstractWhen poultry litter is landspread, steroidal hormones present in the litter may reach environmental waters, where they may have undesirable biological effects. In a laboratory study, we determined the mineralization of [4–14C]-labeled 17ß-estradiol, estrone, and testosterone in breeder and broiler litter at three different water potentials (-56, -24, and -12 MPa) and three different temperatures (25, 35, and 45°C). Mineralization was similar in both litters and increased with increasing moisture and decreasing temperature. After 23 weeks at -24 MPa, an average of 27, 11, and <2% of the radiolabeled testosterone applied to breeder litter was mineralized to 14CO2 at 25, 35, and 45°C, respectively. In contrast, mineralization of the radiolabeled estradiol and estrone was <2% after 25 weeks at both water potentials, except after 17 weeks at 25°C and -12 MPa, where up to 5.9% of the estradiol and 7.8% of the estrone was mineralized. The limited mineralization suggests that the litters may still be potential sources of hormones to environmental waters.
dc.languageeng
dc.publisheruga
dc.rightspublic
dc.subjectAndrogens
dc.subjectBreeder litter
dc.subjectBroiler litter
dc.subjectChicken litter
dc.subjectEndocrine
dc.subjectEstrogens
dc.subjectTemperature
dc.subjectWater Potential
dc.titleMineralization of the steroidal hormones 17b-estradiol, estrone, and testosterone in poultry litters
dc.typeThesis
dc.description.degreeMS
dc.description.departmentEcology
dc.description.majorConservation Ecology and Sustainable Development
dc.description.advisorPeter G. Hartel
dc.description.committeePeter G. Hartel
dc.description.committeeKang Xia
dc.description.committeeC. Ron Carroll


Files in this item

FilesSizeFormatView

There are no files associated with this item.

This item appears in the following Collection(s)

Show simple item record