Wheaton College (MA) Digital Repository
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Spine label: Small pond water chemistry and algal ecology.
No full textiv, 93 leaves: color illustrations.Includes bibliographical references: leaves 85-93.Anthropogenic contamination of water bodies with excess nutrients and road salts has resulted in cultural eutrophication and freshwater salinization throughout the Midwestern and Eastern United States. This study focuses on the algal populations and chemical properties of two small, manmade water bodies; Gilmore Pond in Westborough, MA, and Peacock Pond in Norton, MA. Over the course of six months (late May-early November), environmental parameters including nutrients, ions, as well as temperature, dissolved oxygen, conductivity, and pH were measured to determine effects on pond trophic status and algal populations. Gilmore Pond was determined to be a eutrophic system, dominated by phytoplankton, with brown waters, likely resulting from terrestrial dissolved organic carbon inputs. Peacock Pond was determined to be a eutrophic system, dominated by benthic algae, with high salt contamination from surrounding roads and walkways. Additionally, a field study of the dinoflagellate Ciratium hirundinella in Peacock Pond revealed morphological changes with fluctuations in water temperature and phosphorus. Using past data on algal bioindicators and environmental parameters, a decline in water quality was observed in both water bodies between a similar survey in 2013 and the present study. The results of this study will be used by future student researchers and pond managers as we attempt to improve the aesthetic and ecological properties of these ponds.Chemistry – Phosphorus – Nitrogen – Carbon and pond browning – Road salts – Biology – Planktonic algae – Aquatic plants and benthic algae – Pond management – Introduction to Study – History – Past research – Methods – Results – Discussion – Chemistry – Dissolved oxygen – Phosphorus – Nitrogen – Carbon and Pond Browning – Road Salts – Biology – Phytoplankton community – Ceratium hirundinella morphology (Peacock pond) – Conclusion – Acknowledgements – Literature cite
Effects of acute tetrandrine exposure on autophagy in young and old Gallus gallus embryonic peripheral neurons as measured by abundance of autophagic vacuoles.
No full text9 pages; illustrations
Spine label: Perfect colorings of a design with 2-dimensional euclidean crystallographic.
No full texti, 72 leaves: color illustrations.Includes bibliographical references: leaves 72.This thesis introduces perfect colorings and the systematic way of generating perfect colorings. We study the perfect colorings for designs whose symmetry groups are 2-dimensional Euclidean crystallographic groups. Two-dimensional Euclidean crys- tallographic groups are discrete subgroups of the isometry group of the Euclidean plane. We classify crystallographic groups by their ranks. Crystallographic groups of rank 0, rank 1, and rank 2 are explained with details and examples. Theorems that related to the number of perfect colorings for designs with crystallographic symmetry groups are constructed and proved.1 Abstract – 2 Background – 2.1 Symmetry and symmetry group – 2.2 Metric space and isometry group – 2.3 Crystallographic groups – 3 Coloring and perfect coloring – 4 Perfect colorings of square, hexagon, and pentagon – 4.1 Perfect colorings of square – 4.2 Perfect colorings of hexagon – 4.3 Perfect colorings of pentagon – 5 Counting perfect colorings of a design with symmetry group D2n – 6 Frieze patterns and colorings – 6.1 Frieze groups and frieze patterns – 6.2 Colorings of frieze patterns – 6.3 Imposing D2n Symmetry on a colored frieze pattern – 7 Wallpaper Patterns and colorings – 7.1 Wallpaper groups and wallpaper patterns – 7.1.1 Wallpaper patterns with parallelogram unit cells – 7.1.2 Wallpaper patterns with rectangular unit cells – 7.1.3 Wallpaper patterns with rhombic unit cells – 7.1.4 Wallpaper patterns with square unit cells – 7.1.5 Wallpaper patterns with hexagonal unit cells – 7.2 Future work : Colorings of wallpaper pattern
A preliminary study on the effects of a supplemental antioxidant on neuronal reactive oxygen species.
No full text8 pages; illustrations
A New Enceladus Global Control Network, Image Mosaic, and Updated Pointing Kernels From Cassini�s 13-Year Mission
Get PDF17 pages; Color illustrationsDistributed under a Creative Commons Attribution-ShareAlike 3.0 Unported License.24 pages; color illustrations
A preliminary study of mercury (II) chloride in relation to rate of axonal outgrowth in Gallus gallus neurons.
Get PDF11 pages; illustrations
Temperature and pH effects on the formation of cyclodextrin-fluorouracil.
No full texti, 59 leaves; illustrations.Includes bibliographical references: leaves 35-36.This study analyses the effects of pH and temperature on cyclodextrin-fluorouracil and cyclodextrin-uracil complexes. Fluorouracil is a chemotherapy drug given in high dosages leading to severe adverse effects. To reduce the severity of these effects, the drug would need to be more water soluble increasing the efficacy of the drug. To increase the water solubility, a host molecule cyclodextrin is used to form an inclusion complex with the drug. The thermodynamic properties and chemical equilibria were determined of different pH and temperature environments to gain a better understanding of this complex formation. It was found that the reaction between the host-guest molecules is a spontaneous process, endothermic, and entropy- driven. As the temperature increases, the number of host-guest molecules increase.1.Introduction – 1.1 General host-guest chemistry background – 1.2 Cyclodextrins – 1.2a General structure – 1.2b Complex formation –1.2c Solubility – 1.2d Advantages of using cyclodextrin as a host molecule –1.2e Applications –1.3 General biochemistry – 1.3a Structure of DNA – 1.3b DNA replication –1.4 5-Fluorouracil – 1.4a Structure and chemical properties –1.4b Function as a chemotherapy drug –1.5 Binding constants – 1.6 Goal of experiment 2. Experimental procedures – 2.1 Materials – 2.2 Methods and instrumentation –2.2a FT-IR spectroscopy – 2.2b Preparation of stock solutions -- 2.2c Preparation of samples – 2.2d Measuring absorption spectra – 2.2e Measuring emission spectra – 3. Results and discussion – 3.1 Infrared spectroscopy – 3.2 Absorption and emission spectra; data analysis – 4. Limitations – 5. Future work – 6. Reference
Grounding friendship in non-traditional moral frameworks.
No full text106 leaves.Includes bibliographical references: leaves 103-106.I distinguish between two types of questions about the conflict between friendship commitments and rule based morality: normative questions, and metaethical questions. In order to answer the normative questions, we must first answer the metaethical question about the conflict. That is what I do in this thesis. Previous attempts to handle the conflict between friendship and morality — either by appeal to traditional moral theories, or by removing friendship from the moral realm entirely — fail to correctly understand the nature of friendship, and its conflict with rule based morality. I suggest that we must look to non-traditional moral theories such as Feminist Care Ethics, or Particularist Moral Values Pluralism, in order to get the correct account of friendship, morality, and the conflict between them.Introduction – Plan for thesis – Chapter 1 There is a problem – The lying case – How traditional moral theories get the lying case wrong – Analyzing the lying case – Objections to the lying case – Chapter 2 Non-moral accounts of friendship – Cocking and Kennett’s – Alexander Nehamas’s aesthetic value account of friendship – Chapter 3 Problems with non-moral accounts of friendship – Non-moral accounts only meet one goal – Three objections to non-moral accounts of friendship – Where to next – Chapter 4 The ways forward – Friendship and a (feminist) care ethics framework – Friendship and a moral values pluralism framework – Objections redux – Conclusion – Bibliograph
Quantitative analysis of gene expression in longfinned zebrafish.
No full textii, 56 leaves : illustrations.Includes bibliographical references: leaves 50-56.For years, researchers have studied how organ and appendage sizes are tightly regulated to produce species-characteristic proportions. The Schleier zebrafish is a mutant zebrafish that is characterized by elongated fins that make it a valuable target for research on regulation of size and proportion. In addition, this altered fin mutant is valuable to study because it not only shows allometric growth, but it also shows regenerative growth, providing a rich understanding of how the two processes are interrelated. One way to investigate the molecular underpinnings of the mutant Schleier phenotype is to look at which genes are expressed in Schleier caudal fin versus those in wildtype caudal fin. In this study, the expression of four genes (dual oxidase, thioredoxin, hmox1a, coagulation factor 5) related to stress response and oxidoreductase activity, and two genes related to regeneration (fgf20 and msxb) was analyzed by quantitative PCR (qPCR) to verify preliminary RNA-seq data and determine a possible pathway involved in the mutant phenotype. Analysis of the qPCR data shows upregulation of genes related to oxidative stress in the Schleier mutant, but no differential expression of the regeneration markers between the Schleier and wildtype zebrafish. This supports the idea that the longfinned mutant phenotype is not due to the prolonged expression of regeneration genes, but to some other mechanism, such as the triggering of genes related to oxidative stress
My name is not Annie Sullivan, a plovella.
No full textii, 165 leaves.Includes bibliographical references: leaves 165.This thesis introduces a new form of literature, the plovella, which combines elements of novels, plays, poems, and songs to form a complex layering of interaction between narrator and characters. This approach enables the author to create a sense of ambiguity throughout the narrative. Both the narrator’s and characters’ perspectives are clearly incorporated into the work, creating a multi-faceted approach to presenting the story. Throughout the storyline, the reader is challenged to discern the reliability of the narrator’s perspective.The first section of this text is a fictional work detailing the lives of millennials within an Evangelical Christian community. While to many the lives of these young people may appear lacking in complexity and easily discernable, the narrative shows clearly that they are much more complex than they may appear to be. The second section analyzes how a plovella functions and the influence of culture and religion on the work