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Articles 1 - 18 of 18
Full-Text Articles in Life Sciences
Analysis Of Optimum Location, Viability, And Potential Effects Of Wind Farm Construction In Maine, Elizabeth Benson, Ryan Scott
Analysis Of Optimum Location, Viability, And Potential Effects Of Wind Farm Construction In Maine, Elizabeth Benson, Ryan Scott
Undergraduate Research Symposium (UGRS)
Maine has the highest potential for wind energy in New England and falls within the top twenty states in the nation. It falls just behind Wisconsin and California with an estimate electrical output of 56 billion kWhs. The geological makeup of Maine’s mountains in the western part of the state, and the exposed coastline provide opportune areas to capture wind and convert it into energy. The information included in this poster will suggest the most likely areas for wind development based on a number of factors as recommended by the American Wind Energy Association.
The Movement Of The Gastrop Littorina Littorea In The Intertidal Zone During The Onset Of Winter, Jon Lefcheck
The Movement Of The Gastrop Littorina Littorea In The Intertidal Zone During The Onset Of Winter, Jon Lefcheck
Undergraduate Research Symposium (UGRS)
The movement of the snail Littorina littoreaon the North Atlantic coast is poorly understood. Most research has concentrated on the vertical distribution of the snail, and suggests that it prefers the low intertidal zone where its food source is most plentiful. In the winter, this distribution is reinforced by a documented seaward migration of snails from the high intertidal zone in response to falling temperatures. From October 14, 2006 to January 22, 2007, I examined the individual movements and recovery of snails in response to the onset of winter. I proposed that falling water and air temperatures drive the majority …
Characterization Of Afn1, A Gene Associated With Cereal Grain Germination, Tenzin Tsewang, Russell Johnson
Characterization Of Afn1, A Gene Associated With Cereal Grain Germination, Tenzin Tsewang, Russell Johnson
Undergraduate Research Symposium (UGRS)
The AFN1 gene is transiently expressed in germinating oat grains. As AFN1 is not expressed in dormant oat grains during imbibition, we hypothesize that AFN1 may be involved in stimulating the germination process. Sequence analysis of an AFN1 cDNA clone indicates that the AFN1 polypeptide is similar to a previously identified abscisic acid (ABA) glucosyl transferase. This suggests that AFN1 may be acting to glucosylate ABA, thereby inactivating it. As the hormone ABA is known to inhibit germination, ABA glucosylation/inactivation could lead to germination in grains expressing AFN1. To test this hypothesis, we have constructed an expression plasmid that encodes …
A Pollen Chase Experiment; Examining Varying Levels Of Embryonic Inbreeding Depression, Emily Wilson, Judy Stone
A Pollen Chase Experiment; Examining Varying Levels Of Embryonic Inbreeding Depression, Emily Wilson, Judy Stone
Undergraduate Research Symposium (UGRS)
A pollen chase experiment was performed upon three Costa Rican populations of Witheringia solanacea to examine the breakdown of genetically enforced self incompatibility (SI) and the extent of embryonic inbreeding depression. Self-pollen was applied in the bud, with outcross pollen applied one day later, and outcross pollinations at both intervals as a control. A variety of responses were found among the populations. BOHS readily accepted self pollen and suffered from very low inbreeding depression. Monteverde and Las Cruces both have lower fruit set with self-pollination precedence indicating that bud pollinations can overcome the self-incompatibility response and that embryonic death due …
Measuring Ultrasonic Communication Between Mouse Pups And Adult Mother Mice, Katie Ludwig
Measuring Ultrasonic Communication Between Mouse Pups And Adult Mother Mice, Katie Ludwig
Undergraduate Research Symposium (UGRS)
Measuring ultrasonic communication provides us with a way to study parental influence on animals. In this study I measured the ultrasonic communication between mouse pups and two maternal females, one of which who had given birth to the pups and the other had raised them. I found that there was no significant difference between the amount of noise expressed by pups in response to each the biological mother and foster mother test groups. Mouse pups call to maternal females regardless of genetic relatedness. Communication in mice may be a more complicated model because of their communal nature.
Differential Habituation Of Male Betta Splendens To Qualitatively Different Stimuli, Lauren Baard
Differential Habituation Of Male Betta Splendens To Qualitatively Different Stimuli, Lauren Baard
Undergraduate Research Symposium (UGRS)
Habituation is a learning mechanism that functions to decrease the amount of energy and attention focused on a certain stimuli. Male Siamese Fighting Fish, Betta splendens, are territorial animals that defend their territories using a number of aggressive displays. Male Bettas have previously shown the ability to habituate to the presence of a conspecific male when visually exposed to each other. Due to the costly nature of many of the male Betta’s displays, I hypothesized that male Bettas should differentially habituate to qualitatively different stimuli. I presented each of three groups of male Betta splendens with a different stimulus, each …
The Isolation And Characterization Of Multiply Antibiotic Resistant Strains Of Fish Pathogenic Flavobacterium Species, Sarah E. Clark, Jaehee Yun, Justin Guay
The Isolation And Characterization Of Multiply Antibiotic Resistant Strains Of Fish Pathogenic Flavobacterium Species, Sarah E. Clark, Jaehee Yun, Justin Guay
Undergraduate Research Symposium (UGRS)
Since the development of the first antibiotics in the 1940’s, there has been widespread overuse in both clinical and agricultural applications. Antibiotic resistance has become a significant problem as a result of subsequent dissemination of antibiotics into the environment, and multiply-resistant strains of bacteria are now a major pathogenic threat. In this study eight separate strains of Flavobacterium responsible for recent disease outbreaks in fish hatcheries throughout Maine were collected and analyzed. All eight strains were found to be resistant to high levels of a number of different antibiotics, including those used for aquaculture as well as human chemotherapeutic applications. …
Predator Survival Tactics And Use Of Habitat Cover In Rana Catesbeiana., Tara E. Bergin
Predator Survival Tactics And Use Of Habitat Cover In Rana Catesbeiana., Tara E. Bergin
Undergraduate Research Symposium (UGRS)
Predator-prey relationships are an important aspect of the natural world, and, because of its relevance to survival and natural selection, is an interesting relationship to study. In amphibian larvae, level of activity and landscape use are often what determines the survival as prey. I studied the anti-predator behavior of the North American bullfrog (Rana catesbeiana) tadpoles when presented with dragonfly (Aeshna) larvae, a known predator of tadpoles. Tadpoles were acclimated to four different habitats with varying degrees of habitat cover, and were transferred to a new habitat with a degree of cover equal to one of the acclimation tanks. A …
Climate Change And Its Effects On Polar Bears, Alex C. Jospe, Bethany C. Peck, Emily Sinnott
Climate Change And Its Effects On Polar Bears, Alex C. Jospe, Bethany C. Peck, Emily Sinnott
Undergraduate Research Symposium (UGRS)
Polar bears are key indicators of the effects of climate change on the arctic ecosystem, because their existence is directly related to the sea ice habitat, where they hunt. As the Arctic continues to warm, their habitat will be reduced further and local extinction is likely to occur, especially in southern populations.
Variation In Beach Profile And Sediment Characteristics At Popham Beach, Phippsburg, Me, Kathryn Lidington
Variation In Beach Profile And Sediment Characteristics At Popham Beach, Phippsburg, Me, Kathryn Lidington
Undergraduate Research Symposium (UGRS)
No abstract provided.
Concomitant Antibiotic And Mercury Resistance Among Gastrointestinal Microflora Of Feral Brook Trout, Salvelinus Fontinalis, Matt Meredith
Concomitant Antibiotic And Mercury Resistance Among Gastrointestinal Microflora Of Feral Brook Trout, Salvelinus Fontinalis, Matt Meredith
Undergraduate Research Symposium (UGRS)
No abstract provided.
The Economic Effects Of Ski Resorts On Communities In The State Of Maine, Rachel Freierman
The Economic Effects Of Ski Resorts On Communities In The State Of Maine, Rachel Freierman
Undergraduate Research Symposium (UGRS)
Skiing and snowboarding is a fairly expensive activity for participant and one in which the industry as a whole makes handsome profits. In the 2005/06 season, resorts in the Northeast reported an average gross revenue of $18.5 million. (NSAA) With the current weather phenomenon of El Nino, however, resorts in New England especially, have been suffering economically. The gross revenue in New England in the ’05/’06 season was down 4% from the previous year, likely due to the fact the total snowfall declined by 16%. (NSAA) Much of this loss in revenue came during the Christmas to New Years vacation …
Overexpression And Purification Of The Oat (Avena Fatua) Protein Afn1 And Construction Of A Pmal/Afn1 Expression Plasmid, Tenzin D. Tsewang
Overexpression And Purification Of The Oat (Avena Fatua) Protein Afn1 And Construction Of A Pmal/Afn1 Expression Plasmid, Tenzin D. Tsewang
Undergraduate Research Symposium (UGRS)
Abscisic acid (ABA) is an important phytohormone with regulatory roles in many physiological processes. ABA expression is induced by environmental stresses such as drought and it is known to be an inhibitor of seed germination. A wild oat (Avena fatua) called AFN1 has been hypothesized to initiate the early stages of germination as its mRNA accumulates in nondormant seed embryos during imbibition. The polypeptide sequence of AFN1 suggests that it is an ABA glucosyl transferase. Glucosylation by AFN1 and thereby inactivation of ABA could lead to seed germination. In order to understand the role of AFN1 in germination, an ample …
A Broad-Spectrum Mer Operon In A Multi-Drug Resistant Strain Of The Fish Pathogen, Aeromonas Salmonicida., Erin Parry
A Broad-Spectrum Mer Operon In A Multi-Drug Resistant Strain Of The Fish Pathogen, Aeromonas Salmonicida., Erin Parry
Undergraduate Research Symposium (UGRS)
Aeromonas salmonicida AS03, a potential fish pathogen, was isolated from Atlantic salmon, Salmo salar, in 2003. This strain was found to be resistant to ≥1000 mM HgCl2 and ≥32 mM phenylmercuric acetate as well as multiple antimicrobials. Mercury (Hg) and antibiotic resistance genes are often located on the same mobile genetic elements, so the genetic determinants of both resistances and the possibility of horizontal gene transfer were examined. Specific PCR primers were used to amplify and sequence distinctive regions of the mer operon. A. salmonicida AS03 was found to have a pDU1358-like broad-spectrum mer operon, containing merB as well as …
Epichlorohydrin Cross-Linking Of Synthetic Dna Oligomers, Rami W. Zaharan, Julie T. Millard
Epichlorohydrin Cross-Linking Of Synthetic Dna Oligomers, Rami W. Zaharan, Julie T. Millard
Undergraduate Research Symposium (UGRS)
Epichlorohydrin (ECH), an important chemical in the synthetic polymer industry, is a bifunctional alkylating agent with the potential to form DNA interstrand crosslinks. Occupational exposure to this suspect carcinogen leads to chromosomal aberrations, and ECH has been shown to undergo reaction with DNA in vivo and in vitro. We are using denaturing polyacrylamide gel electrophoresis to assess cross-linking of synthetic DNA oligomers by both ECH and the related compound, epibromohydrin (EBH). Both epihalohydrins produce a low-mobility band on denaturing gels consistent with an interstrand cross-link. Moreover, the efficiencies, sequence preferences, reaction kinetics, and pH dependence differ for the two compounds, …
The Impact Of Land Use Patterns And Watershed Characteristics On China Lake, Kennebec County, Maine, Rachel N. Carr, Caroline A. Polgar, Jakob B. Moe, F. Russell Cole, David H. Firmage, Kirsten L. Ness
The Impact Of Land Use Patterns And Watershed Characteristics On China Lake, Kennebec County, Maine, Rachel N. Carr, Caroline A. Polgar, Jakob B. Moe, F. Russell Cole, David H. Firmage, Kirsten L. Ness
Undergraduate Research Symposium (UGRS)
China Lake is located in Kennebec County, Maine. Since 1983 the lake has suffered from yearly algal blooms as a result of the addition of excess nutrients. The nutrient load was amplified by erosion within the watershed. Erosion varies widely depending on a number of factors, including the slope of the land, the type of soil, and the way the land is being used. Certain land use types have a high potential to add nutrients to the environment, while others may help absorb excess nutrients and prevent erosion and runoff into the lake. A comprehensive examination of the China Lake …
Man-Made Menopause, Madeline Horwitz
Man-Made Menopause, Madeline Horwitz
Undergraduate Research Symposium (UGRS)
In this study I suggest that there are three distinct time periods mark new developments in society’s understanding of menopause, Victorian America in the mid and late nineteenth century, mid-twentieth century America, and contemporary America. This is the case not only in terms of advances in biological science, but also the ways in which the medical establishment has viewed menopause has also changed, and in terms of changes in prevalent gender assumptions. In this paper I hope to expose the ways science, history, and society has medicalized menopause, and the ways in which menopause has been viewed by individual women, …
Characterization Of The Wheat Grain Pkaba1-Interacting Protein Tawd40, Natalie Wayne
Characterization Of The Wheat Grain Pkaba1-Interacting Protein Tawd40, Natalie Wayne
Undergraduate Research Symposium (UGRS)
Abscisic acid (ABA)-mediated gene expression is a critical component of plant responses to this important hormone, which affects plant growth, development, and responses to environmental stresses. Plant responses to ABA are mediated by a number of factors including PKABA1, an ABA induced protein kinase involved in ABA-suppressed gene expression in cereal grains, and TaWD40, which has previously been shown to physically interact with PKABA1. A full-length 1.9 kb TaWD40 cDNA, CK210682, was sequenced as part of this project. Based on the deduced protein sequence, it is thought that TaWD40 may belong to the family of E3 ubiquitin ligases, possibly targeting …