3 resultados para Sacrifice.

em Bucknell University Digital Commons - Pensilvania - USA


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In this thesis, I will document and analyze historical aspects of the British debate over adopting a common currency with the European Community primarily during the last half of the twentieth century until the present. More specifically, while on the surface such a decision would seem to turn on economic or political considerations, I will show that this historic British decision not to surrender their pound sterling in exchange for the euro was rooted in the nation's cultural identity. During this decades long British debate over the euro, two opposing, but strongly held, positions developed; one side believed that Britain had a compelling interest in bonding with the rest of Europe economically as well as politically, the other side believed that Britain's independent heritage was deeply rooted in many of its traditions including maintaining control of its own monetary matters, which included keeping its pound sterling. As part of this thesis, I have conducted interviews with business leaders, economists, and social scientists as well as researched public records in order to assess many of the arguments favoring and opposing Britain's adoption of the euro. Many Britons strongly believed that it was time to join other Europeans, who were willing to sacrifice their sovereign currency to a bold common currency experiment, while other Britons viewed the pound sterling as too integral a part of British heritage to abandon. Ultimately, British leaders and citizens had to determine whether such a currency tradeoff would be worth it to them as a nation. It was a gamble that twelve other nations (at the time of the euro's 2002 launch) were ready to take, optimistically calculating that easier credit and reduced exchange transaction costs would lead to greater economic prosperity. Many asserted that only with ! ! such a united European monetary coalition would Europe's nations be able to compete trade-wise with powerful economic nations like the United States and China. My conclusion is that Britain's refusal to join the euro was a decision that had less to do with economic opportunity or political motivations and much more to do with how the British people viewed themselves culturally and their identity as an independent nation.

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Synthetic glucocorticoids (GC) are used as a clinical therapeutic to stimulate lung development in fetuses that present the risk of preterm delivery. Previous studies have shown that a prenatal exposure to Dexamethasone (DEX) causes a disturbance in normal GC mediation of neuritic outgrowth, cell signaling, and serotonergic systems. Our hypothesis is that a prenatal exposure to DEX during the third trimester of pregnancy alters 5HT1A receptor function. Pregnant dams were injected daily with 150μg/ml/kg of DEX from gestation day 14 through 19. Control dams were treated with and equal volume of saline. Swim stress followed by elevated plus maze testing was conducted on male rats an hour and a half prior to being sacrificed to induce postnatal acute stress. The non-stressed group was also tested and allowed to return to baseline before sacrifice. Hippocampi were analyzed using a radioligand-receptor binding assay and GTPγS35 incorporation (3H-MPPF antagonist and 8-OH-DPAT agonist, respectively). A significant increase in Kd was found in non-stressed DEX-exposed animals compared to non-stressed controls (p

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The purpose of our study is to investigate the effects of chronic estrogen administration on same-sex interactions during exposure to a social stressor and on oxytocin (OT) levels in prairie voles (Microtus orchrogaster). Estrogen and OT are two hormones known to be involved with social behavior and stress. Estogen is involved in the transcription of OT and its receptor. Because of this, it is generally thought that estrogen upregulates OT, but evidence to support this assumption is weak. While estrogen has been shown to either increase or decrease stress, OT has been shown to have stress-dampening properties. The goal of our experiment is to determine how estrogen affects OT levels as well as behavior in a social stressor in the voles. In addition, estrogen is required for many opposite-sex interactions, but little is known about its influence on same-sex interactions. We hypothesized that prairie voles receiving chronic estrogen injections would show an increase in OT levels in the brain and alter behavior in response to a social stressor called the resident-intruder test. To test this hypothesis, 73 female prairie voles were ovariectomized and then administered daily injections of estrogen (0.05 ¿g in peanut oil, s.c.) or vehicle for 8 days. On the final day of injections, half of the voles were given the resident-intruder test, a stressful 5 min interaction with a same-sex stranger. Their behavior was video-recorded. These animals were then sacrificed either 10 minutes or 60 minutes after the conclusion of the test. Half of the animals (no stress group) were not given the resident-intruder test. After sacrifice, trunk blood and brains were collected from the animals. Videos of the resident-intruder tests were analyzed for pro-social and aggressive behavior. Density of OT-activated neurons in the brain was measured via pixel count using immunohistochemistry. No differences were found in pro-social behavior (focal sniffing, p = 0.242; focal initiated sniffing p = 0.142; focal initiated sniffing/focal sniffing, p = 0.884) or aggressive behavior (total time fighting, p= 0.763; number of fights, p= 0.148; number of strikes, p = 0.714). No differences were found in activation of OT neurons in the brain, neither in the anterior paraventricular nucleus (PVN) (pixel count p= 0.358; % area that contains pixelated neurons p = 0.443) nor in the medial PVN (pixel count p= 0.999; % area that contains pixelated neurons p = 0.916). These results suggest that estrogen most likely does not directly upregulate OT and that estrogen does not alter behavior in stressful social interactions with a same-sex stranger. Estrogen may prepare the animal to respond to OT, instead of increasing the production of the peptide itself, suggesting that we need to shift the framework in which we consider estrogen and OT interactions.