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Full-Text Articles in Physiology
Brain Injury And Inflammation And Placental Inflammation In Response To Repetitive Umbilical Cord Occlusions In The Near Term Ovine Fetus, Alex Xu
Electronic Thesis and Dissertation Repository
We hypothesized that repetitive umbilical cord occlusions (UCOs) leading to severe acidemia will stimulate a placental and fetal inflammatory response associated with brain injury, which will be exacerbated by chronic hypoxemia and low-grade infection. Chronically instrumented fetal sheep served as controls or underwent repetitive UCOs for up to 4 hours or until fetal arterial pH was2saturation pre-UCOs of >55% and
Freeze Tolerance In The Spring Field Cricket, Gryllus Veletis, Alexander H. Mckinnon
Freeze Tolerance In The Spring Field Cricket, Gryllus Veletis, Alexander H. Mckinnon
Electronic Thesis and Dissertation Repository
Many insects are able to survive internal ice formation. However, the mechanisms underlying freeze tolerance are not well-understood, perhaps because of a lack of suitable model organisms. I found that the spring field cricket, Gryllus veletis, seasonally acquires freeze tolerance in the fall when kept outside in London, Ontario. Moreover, individuals acquired freeze tolerance in the laboratory in response to a simulated fall thermophotoperiod. Lab-acclimated G. veletis freeze at -6.1 ± 0.7 ºC and the acquisition of freeze tolerance is accompanied by the accumulation of proline and trehalose. Crickets survived temperatures as low as -12 ºC (1.5 h), and …