Thesis Archives Search
This search engine will let you explore the over 1800 theses written in Honors at The University of Maine since the Program’s inception in 1935. You may search our thesis archives based on any of the fields listed above. If the thesis is available at the Reynolds Library (Thomson Honors Center) or Fogler Library (Special Collections), the information will appear below the bibliographic data. At last count, we had about 1800 theses in the Reynolds Library.
Search Results
Chromosome Cytology in Mytilus Edulis
Chytridiomycota in Tree Bark
Author:
Paige
Strasko
Major: Ecology and Environmental Sciences Graduation Year: 2020 Thesis Advisor: Seanna Annis & Joyce Longcore
Description of Publication:
Chytridiomycota is a phylum of microscopic aquatic fungi that form motile spores that typically have a single posterior flagellum, thus they require water to disperse (James et al., 2000). Chytridiomycota, collectively called chytrids, have round shapes with structures called rhizoids that absorb nutrients and anchor them to their substrate (Mueller et al., 2004). Chytrids are typically found in aquatic environments and soils since zoospores require water to germinate (James et al., 2000), but they also have been found in a number of unexpected environments. Chytrids are difficult to find because they are microscopic and have time-sensitive life cycles (Mueller et al., 2004). Isolation is difficult because chytrid species require specific nutrients for growth and grow less rapidly than filamentous fungi, yeasts and bacteria. Because chytrids have been found in many habitats and an extensive amount of research on their preferred habitat is lacking, my question was could chytrids be observed and isolated from tree bark samples. In this study bark samples and soil at the base of the trees were collected from red maple (Acer rubrum) and amur cork (Phellodendron amurense) in Pennsylvania, Sunkhaze wildlife refuge in Milford, Maine, and the University of Maine campus in Orono, Maine. A teaspoon of bark or soil was put in gross cultures to bait chytrids. Every sample contained chytrids, abundantly on spruce pollen grain baits and sparsely on onion skin bait. The Internal transcribed spacer (ITS) regions of the ribosomal gene cassette were amplified from extracted DNA for sequencing and will be used to identify the genera of chytrids collected and isolated from samples. The ITS regions amplify highly variable gene sequences that are used to identify fungi. More research is needed, but these findings support that Chytridiomycota can be found on tree bark.
Location of Publication:
URL to Thesis: https://digitalcommons.library.umaine.edu/honors/638/
Major: Ecology and Environmental Sciences Graduation Year: 2020 Thesis Advisor: Seanna Annis & Joyce Longcore
Description of Publication:
Chytridiomycota is a phylum of microscopic aquatic fungi that form motile spores that typically have a single posterior flagellum, thus they require water to disperse (James et al., 2000). Chytridiomycota, collectively called chytrids, have round shapes with structures called rhizoids that absorb nutrients and anchor them to their substrate (Mueller et al., 2004). Chytrids are typically found in aquatic environments and soils since zoospores require water to germinate (James et al., 2000), but they also have been found in a number of unexpected environments. Chytrids are difficult to find because they are microscopic and have time-sensitive life cycles (Mueller et al., 2004). Isolation is difficult because chytrid species require specific nutrients for growth and grow less rapidly than filamentous fungi, yeasts and bacteria. Because chytrids have been found in many habitats and an extensive amount of research on their preferred habitat is lacking, my question was could chytrids be observed and isolated from tree bark samples. In this study bark samples and soil at the base of the trees were collected from red maple (Acer rubrum) and amur cork (Phellodendron amurense) in Pennsylvania, Sunkhaze wildlife refuge in Milford, Maine, and the University of Maine campus in Orono, Maine. A teaspoon of bark or soil was put in gross cultures to bait chytrids. Every sample contained chytrids, abundantly on spruce pollen grain baits and sparsely on onion skin bait. The Internal transcribed spacer (ITS) regions of the ribosomal gene cassette were amplified from extracted DNA for sequencing and will be used to identify the genera of chytrids collected and isolated from samples. The ITS regions amplify highly variable gene sequences that are used to identify fungi. More research is needed, but these findings support that Chytridiomycota can be found on tree bark.
Location of Publication:
URL to Thesis: https://digitalcommons.library.umaine.edu/honors/638/
Circadian Rhythm Effects on Clinical Mood Disorders
CITRATE’S COUNTER IONS AND PH EFFECT ON GOLD NANOPARTICLE GROWTH KINETICS
Author:
Andrew
Closson
Major: Biomedical Engineering Graduation Year: 2016 Thesis Advisor: Michael D. Mason
Description of Publication:
The effects of citrate’s counterions and pH are examined in gold nanoparticle growth kinetics. The growth of gold nanoparticles from citrate reduction is a common method used for creating particles from 10-120 nm with a well-defined size distribution [1-4]. TEM observation of the seed-mediated growth shows an intermediate aggregation phase that has been shown by researchers to exist in other solution-phase nanocrystal growth [5]. We have shown that this intermediate agglomeration phase within particle growth may be avoided with certain pairings of counterion and pH. This aggregation phase has no noticeable effects on the formation of the particles at a smaller scale but may be cause for concern when the seed-mediated growth process is used at higher particle concentration and larger volumes. The ability to get rid of this aggregation phase at a small scale may help avoid unwanted particle characteristics at an industrial scale which includes increased volume and concentration of production.
Location of Publication: fogler
URL to Thesis: https://digitalcommons.library.umaine.edu/honors/374
Major: Biomedical Engineering Graduation Year: 2016 Thesis Advisor: Michael D. Mason
Description of Publication:
The effects of citrate’s counterions and pH are examined in gold nanoparticle growth kinetics. The growth of gold nanoparticles from citrate reduction is a common method used for creating particles from 10-120 nm with a well-defined size distribution [1-4]. TEM observation of the seed-mediated growth shows an intermediate aggregation phase that has been shown by researchers to exist in other solution-phase nanocrystal growth [5]. We have shown that this intermediate agglomeration phase within particle growth may be avoided with certain pairings of counterion and pH. This aggregation phase has no noticeable effects on the formation of the particles at a smaller scale but may be cause for concern when the seed-mediated growth process is used at higher particle concentration and larger volumes. The ability to get rid of this aggregation phase at a small scale may help avoid unwanted particle characteristics at an industrial scale which includes increased volume and concentration of production.
Location of Publication: fogler
URL to Thesis: https://digitalcommons.library.umaine.edu/honors/374
City Manager Government in Brewer
Civic Improvement: The Bangor Fire and Reconstruction, 1911-1914
CLASS CONFLICT AND THE CONFEDERATE CONSCRIPTION ACTS IN NORTH CAROLINA, 1862-1864
Author:
Tyler
C.
Cline
Major: History Graduation Year: 2014 Thesis Advisor: Micah Pawling
Description of Publication:
Location of Publication:
URL to Thesis: http://digitalcommons.library.umaine.edu/honors/164/
Major: History Graduation Year: 2014 Thesis Advisor: Micah Pawling
Description of Publication:
Location of Publication:
URL to Thesis: http://digitalcommons.library.umaine.edu/honors/164/