Showing 451 - 460 of 564 Items

The role of modulation on the pyloric neurons and the neuromuscular junction in a pattern generator-effector system

Date: 2023-01-01

Creator: Jackie Seddon

Access: Open access

Neuromodulation, the process of altering the electrical outputs of a neuron or neural circuit, allows an organism to control its physiological processes to meet the needs of both its internal and external environments. Previous work shows that the pyloric pattern of the kelp crab (Pugettia producta) stomatogastric nervous system (STNS) neurons responded to fewer neuromodulators than the Jonah crab (Cancer borealis). Since the kelp crab diet primarily eats kelp, it is possible that the movements of the foregut that control digestion may require less flexibility in functional output compared to an opportunistic feeder. To determine whether a reduced flexibility is correlated with diet, this study compared the modulatory responses in Pugettia to two other species of majoid crabs: Chionoecetes opilio and Libinia emarginata, which are both opportunistic feeders. Pooled data for this study found that Libinia and Chionoecetes responded to all twelve modulators tested. When considering the effect of modulators on stomatogastric ganglion (STG) motor outputs, we must consider whether these modulators also alter the excitatory junction potentials (EJPs) at the neuromuscular junction (NMJ), and whether there are differences in responses across species. To test this, the dorsal gastric nerve (dgn) was stimulated while recording intracellularly from the muscle fibers of the associated gm4 muscles. The NMJ of the gm4 in Cancer borealis did not appear to be broadly modulated, as only RPCH and CabTRP showed increases in amplitude, and RPCH decreased facilitation at 5 Hz.


Miniature of The impact of plastic contaminants and neuroprotectants on spinal neural circuits controlling vertebrate locomotion
The impact of plastic contaminants and neuroprotectants on spinal neural circuits controlling vertebrate locomotion
This record is embargoed.
    • Embargo End Date: 2026-05-18

    Date: 2023-01-01

    Creator: Violet Louise Rizzieri

    Access: Embargoed



      Miniature of CRISPR Mutagenesis of the WAK Locus
      CRISPR Mutagenesis of the WAK Locus
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          Date: 2016-01-01

          Creator: Cody P Woods

          Access: Access restricted to the Bowdoin Community



            Miniature of The role of pubertal hormones on female rats' sensitivity to acute ketamine treatment in an early-life-adversity model
            The role of pubertal hormones on female rats' sensitivity to acute ketamine treatment in an early-life-adversity model
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                Date: 2024-01-01

                Creator: Nuanxi (Sissi) Feng

                Access: Access restricted to the Bowdoin Community



                  New Institutional Economics: Political Institutions and Divergent Development in Costa Rica and Honduras

                  Date: 2022-01-01

                  Creator: Maynor Alberto Loaisiga Bojorge

                  Access: Open access

                  For most of their histories, Costa Rica and Honduras were primarily agricultural societies with little economic diversification. However, around 1990, after the implementation of Washington Consensus reforms, the economies of both nations began to diverge. Costa Rica’s economy rapidly expanded for the following 30 years, while Honduras remained stagnant. Through a New Institutional Economics approach, I argue that institutional differences between Costa Rica and Honduras are responsible for the impressive economic growth Costa Rica has been able to achieve in the past few decades. Specifically, early political developments in Costa Rica have deeply imbedded relatively egalitarian values into the population, helping shape formal and informal inclusive political institutions. Meanwhile, Honduras experienced the development of extractive political institutions, as political and economic power was heavily concentrated in the hands of a select few. These political institutions were crucial during the implementation stages of Washington Consensus reforms, as strong and inclusive political institutions attracted Foreign Direct Investment that helped propel the Costa Rican economy and materialize its position as an outlier in the region. In contrast, lack of institutional guarantees discouraged foreign investors from investing money into the Honduran economy. Through a deep dive into the political histories of both nations, from European discovery to modernity, I conclude that the political institutions of these Central American nations have determined their economic growth paths.


                  Miniature of Characterizing variation in enhancer usage within and between natural populations of <i>Drosophila</i> by comparing chromatin conformation in non-coding DNA
                  Characterizing variation in enhancer usage within and between natural populations of Drosophila by comparing chromatin conformation in non-coding DNA
                  This record is embargoed.
                    • Embargo End Date: 2027-05-19

                    Date: 2022-01-01

                    Creator: Serena Jonas

                    Access: Embargoed



                      Miniature of Greening the Market: Natural Groceries from the Countercuisine to Whole Foods
                      Greening the Market: Natural Groceries from the Countercuisine to Whole Foods
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                          Date: 2022-01-01

                          Creator: Livia Kunins-Berkowitz

                          Access: Access restricted to the Bowdoin Community



                            Empire of Horror: Race, Animality, and Monstrosity in the Victorian Gothic

                            Date: 2022-01-01

                            Creator: Grace Monaghan

                            Access: Open access

                            This project examines Victorian England through the analysis of three Victorian gothic novels: Bram Stoker’s Dracula (1897) and The Jewel of Seven Stars (1903/1912), and Richard Marsh’s The Beetle (1897). The end of the nineteenth century and the final years of the Victorian era brought with them fears and uncertainties about England’s role in the world and its future, fears that the Victorian gothic sought to grapple with, but inevitably failed to contain. In examining this genre, I draw on “Undisciplining Victorian Studies” (Chatterjee et al, 2020), which calls for the field of Victorian studies to center racial theory. As such, I foreground race and whiteness in these novels, in conjunction with animality, empire, and sexuality, all of which were crucial tools in the imperial gothic’s project of constructing the monstrous Other. The British empire relied on the establishment of a physical and moral boundary between itself and the colonized Other, in order to justify its imperialism and maintain its own perceived superiority. Yet, ultimately, this project demonstrates that the boundaries between the self and the Other, between morality and monstrosity, and between mainland England and its empire, were dangerously porous.


                            Miniature of The Lay Judge System: Following a Tradition of Maintaining the Status Quo or Forging a Path Towards More Reformation of the Justice System?
                            The Lay Judge System: Following a Tradition of Maintaining the Status Quo or Forging a Path Towards More Reformation of the Justice System?
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                                Date: 2015-05-01

                                Creator: Alexandra Mathieu

                                Access: Access restricted to the Bowdoin Community



                                  Miniature of Surface Soil Stocks: Peat Development and Soil Carbon Storage on South Baffin Island, Nunavut, Canada
                                  Surface Soil Stocks: Peat Development and Soil Carbon Storage on South Baffin Island, Nunavut, Canada
                                  This record is embargoed.
                                    • Embargo End Date: 2028-05-18

                                    Date: 2023-01-01

                                    Creator: Ana Gunther

                                    Access: Embargoed