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. 2014 Oct 13;2:90. doi: 10.3389/fchem.2014.00090

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Copyright © 2014 Egert, Klotz, McLeod and Harmon.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Experiment 1 Results. (A) Mean contraction amplitude of steers (n = 8) for each hour relative to feeding. The mean contraction amplitude of the first 8 h period was higher (P < 0.01) than the second. The mean contraction amplitude of the second 8 h period was not different (P = 0.96) from the third. (B) Mean contraction frequency of steers (n = 8) for each hour relative to feeding. Mean contraction frequency of day 2 was lower (P = 0.03) than day 3. The mean contraction frequency of the first 8 h period was higher (P < 0.01) than the second. The mean contraction frequency of the second 8 h period was different (P < 0.01) from the third. Additionally, the average of the first and third 8 h periods was not different (P = 0.35) from the second. (C) Mean contraction duration of steers (n = 8) for each hour relative to feeding. The mean contraction duration of the first 8 h period was longer (P < 0.01) than the second. The mean contraction duration of the second 8 h period was not different (P = 0.34) from the third. (D) Mean contraction area of steers (n = 8) for each hour relative to feeding. Mean contraction area of day 1 was lower (P = 0.03) than day 3. The mean contraction area of the first 8 h period was greater (P < 0.01) than the second. The mean contraction area of the second 8 h period tended (P = 0.07) to be greater than the third.