Showing 451 - 460 of 564 Items

Miniature of Characterization and distribution of allatostatin type-C (AST-C) neuropeptides and receptors in crustaceans
Characterization and distribution of allatostatin type-C (AST-C) neuropeptides and receptors in crustaceans
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      Date: 2016-05-01

      Creator: Tess Lameyer

      Access: Access restricted to the Bowdoin Community



        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 Roles of Personality, Internalized Stigma, and Shame Proneness as Barriers to Mental Health Treatment
              The Roles of Personality, Internalized Stigma, and Shame Proneness as Barriers to Mental Health Treatment
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              • Restriction End Date: 2026-06-01

                Date: 2023-01-01

                Creator: Grace Cross

                Access: Access restricted to the Bowdoin Community



                  Miniature of Examining the Predictive Value of Anxiety, Depression, and Suicidal Ideation Screening in Determining Psychosis Risk
                  Examining the Predictive Value of Anxiety, Depression, and Suicidal Ideation Screening in Determining Psychosis Risk
                  This record is embargoed.
                    • Embargo End Date: 2028-05-16

                    Date: 2023-01-01

                    Creator: Tara M. D. Mullen

                    Access: Embargoed



                      Diatom blooms in Harpswell Sound: seasonality, succession, and origin

                      Date: 2023-01-01

                      Creator: Charlie Francis O'Brien

                      Access: Open access

                      Harpswell Sound (HS) is an inlet in northeastern Casco Bay that exerts control on Gulf of Maine ecosystem health, yet its complex phytoplankton community dynamics have not been characterized with sufficiently detailed analyses. In this research, high-resolution automated microscopy and current velocity observations were used to test the seasonality, ecological succession, bloom origin location, and potential toxicity of populations in HS between 2020 and 2022. Winter months could exhibit slow accumulation of diatom biovolume. Cold, salty surface water has net outflow in winter as nutrients from depth are replenished during net upwelling conditions, and populations could be exported from the inlet at the surface. Extreme current velocity variability in spring due to the Kennebec River plume in HS destabilizes spatially uniform populations. Warm, low-salinity surface water with net inflow in summer (net downwelling which retains populations at the head of the sound) corresponds with temporally separate dinoflagellate and diatom blooms. Large, multi-peaked spring and fall diatom blooms are recurrent, contrasting small, short-lived blooms in summer. A successional pattern from diatoms to dinoflagellates is confirmed for summer but refuted for other seasons. The hypothesis that diatom succession during all blooms in HS is characterized by large centric cells preceding small cells or pennate cells was explored but no clear pattern in decreasing cell size was observed. Observed tidal effects on biovolume concentration could mask that blooms develop at coherent times but spatially separated. A diverse community of toxic phytoplankton, including dinoflagellates and Pseudonitzschia, are observed throughout the year.


                      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 influence of Toll 7 on the neuroplasticity of auditory neurons in the Mediterranean field cricket (<i>Gryllus bimaculatus</i>)
                      The influence of Toll 7 on the neuroplasticity of auditory neurons in the Mediterranean field cricket (Gryllus bimaculatus)
                      This record is embargoed.
                        • Embargo End Date: 2028-05-16

                        Date: 2023-01-01

                        Creator: Brooke Asherman

                        Access: Embargoed



                          Miniature of Characterization of Spaetzle-Toll Ligand-Receptor Pairs in <i>Gryllus bimaculatus</i>
                          Characterization of Spaetzle-Toll Ligand-Receptor Pairs in Gryllus bimaculatus
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                          • Restriction End Date: 2028-06-01

                            Date: 2023-01-01

                            Creator: Tabarak Al Musawi

                            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 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