Graduation Date: December, 2004
Degree: Animal Science & Industry
Faculty Mentor: Prof. Timothy Rozell, Ph.D.
Currently: Working on Master's degree in Biomedical Sciences at Kansas State University
McNair Research: "What effects do elapsed time and methods of handling have
on the amount of atresia and quality of mRNA contained in the bovine ovarian
Handling methods and storage
temperatures are important factors to consider when working with mRNA and
follicular fluid. In past experiments consistent results were not being achieved
when a RT-PCR or Northern Blot was run on the RNA aspirated from ovaries shipped
from Nebraska. The purpose of this experiment was to determine if this was due
to the fact that the increase of time between slaughter and aspirating the
ovaries allowed the mRNA to start its degradation process before testing.
Bovine ovaries were collected from the Tyson Meat Processing Facility, in Emporia Kansas and were transported with in two hours to the laboratory. The ovaries were divided at the processing facility into three different experimental groups. One group was transported at approximately 25 C, the second group was transported in ice, approximately 4 C, and the third group was transported after being snap frozen in liquid nitrogen, approximately -70 C. Upon returning to the lab a sampling of ovaries from each experimental group was further divided into subgroups based on time; 2 hours, 24 hours, and 48 hours.
Based on the results from the experiment, the ideal time and temperature to aspirate and grade ovaries seems to be 2 hours post harvest and storage at 25 C. This group yielded the most evenly distributed numbers for grades. With this in mind I would recommend an alternate method of shipping ovaries in the future.