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Full-Text Articles in Life Sciences
Chemical And Genetic Composition Analysis Of Organic And Nonorganic Tortilla Chips, Aubrey White-Day
Chemical And Genetic Composition Analysis Of Organic And Nonorganic Tortilla Chips, Aubrey White-Day
Honors Theses
The aim of this study was to explore the chemical and genetic differences between organic and nonorganic tortilla chips using GC-MS and PCR. Twenty chip brands were selected: 10 organic and 10 nonorganic. A survey on shopping preferences was created and distributed to compare results of public opinion to experimental data. It yielded 212 responses. All organic chip brands, and one out of ten nonorganic chip brands, tested negative for GMOs. This study concluded that there are minimal chemical differences based on Jaccard similarity indicies and stark genetic differences between organic and nonorganic tortilla chips. In comparing statistical analyses to …
The Presence Of Photoreceptor Sensilla In The Posterior Sucker Of Medicinal Leeches Inferred Through Functional Visual Response., Claire Spivey
The Presence Of Photoreceptor Sensilla In The Posterior Sucker Of Medicinal Leeches Inferred Through Functional Visual Response., Claire Spivey
Honors Theses
Medicinal leeches gather visual input from both its eyecups and photoreceptors across its body surface; each of its 21 midbody segments possesses 14 photoreceptive sensilla. It has been previously established that the posterior sucker is composed of seven body segments that are fused during embryogenesis. Similarly, four body segments fuse to create the anterior brain. There are five bilateral pairs of eyes located on the dorsal surface of the leech’s head and seven bilateral pairs of sensilla distributed over the surface of each midbody segment (Kretz et al., 1975). If no sensilla were lost during the fusion of the seven …
Effects Of Creatine, Leucine, And Ethanol On Glial Cell Line-Derived Neurotrophic Factor In C2c12 Skeletal Muscle Cells, Daniel Waters
Effects Of Creatine, Leucine, And Ethanol On Glial Cell Line-Derived Neurotrophic Factor In C2c12 Skeletal Muscle Cells, Daniel Waters
Honors Theses
Glial Cell Line-Derived Neurotrophic Factor (GDNF) is a protein expressed throughout the mammalian nervous system that serves several protective functions. Originally discovered in the brain, where it supports the survival of dopaminergic neurons, GDNF has since been shown to be expressed in skeletal muscle and is vital for the maintenance of motor neurons. The relationship between muscle hypertrophy, and GDNF is not well understood. The purpose of this study was to examine the relationship between hypertrophy and GDNF by inducing hypertrophy in C2C12 skeletal muscle cells using leucine and creatine, inhibiting hypertrophy using ethanol and measuring GDNF content. As measured …
A Guided Inquiry To The Bromination Of Alkenes: An Effort To Foster Student Understanding Of Thin Layer Chromatography In The Organic Chemistry Laboratory, Casey Wright
Honors Theses
Many of the chemistry laboratories taught at Western Michigan University are “cookbook” labs, meaning that students are given an instruction manual with a prescribed set of instructions and a predicted outcome. Therein we present an introductory organic chemistry laboratory experiment to reinforce the student understanding of Thin Layer Chromatography which utilizes a guided inquiry format as part of an effort to move toward discovery based learning in our organic chemistry curriculum. Educational research was performed on classroom artifacts collected from the laboratory. We were able to gain an understanding of the struggles students face in applying general chemistry content knowledge …
Determination Of Trace Metals, Volatile Organic Compounds, And Other Water Standards In Wmu Drinking Water, Tyler Walter
Determination Of Trace Metals, Volatile Organic Compounds, And Other Water Standards In Wmu Drinking Water, Tyler Walter
Honors Theses
The USEPA creates drinking water maximum contamination levels to support safety in all environments. Inductively coupled plasma-optical emission spectroscopy (ICP-OES), Watersafe® Drinking Water Test kits, and solid phase microextraction with gas chromatography were used to assess the safety of drinking water in three buildings (Davis Hall, the Chemistry Building, and the Dalton Center) on the campus of Western Michigan University. ICP-OES was used to determine the concentration of several trace metals (Cu, Zn, Fe, Mn, Ni, Pb, and As), Watersafe® Drinking Water Test kits were used to determine the concentration of common contaminants and conditions (E. coli, pesticides atrazine and …
Roman Religion, Medicine, And Disease, Stephanie Clark
Roman Religion, Medicine, And Disease, Stephanie Clark
Honors Theses
Medicine, as experienced in the Roman Empire, was rapidly evolving. Balancing the newly developed theories with the already-established religious belief sparked the beginning of medical secularization. There were separate worlds, that of science and medicine, and that of the every day public, that had to be bridged in a way that honored both traditions, yet kept their integrity. The development of science and medicine pioneered by Galen, a philosopher whose medical knowledge and theory guided practitioners for almost two millennia, hit levels of exploration and understanding in ancient Rome that warranted its basis as common medical theory. However, the world, …
Early Stage Detection Of Marine Oil Oxidation, Loren Lapointe
Early Stage Detection Of Marine Oil Oxidation, Loren Lapointe
Honors Theses
A method involving overnight stir bar sorptive extraction (SBSE) headspace gas chromatography/mass spectrometry (GC/MS) in negative ion chemical ionization (NICI) mode was developed to determine the presence of aldehydes (cis-4-heptenal, trans,trans-2,4-heptadienal, trans-2-octenal, cis-6-nonenal, trans-2-cis-6-nonadienal, trans-2-nonenal, and trans,trans-2,4-decadienal) in fresh and aged commercial fish oil (untreated and treated with antioxidant blends). Aldehyde standards were quantifiable to >100ppb levels using this method. Only trans,trans-2,4-heptadienal was shown to be present in the commercial fish oil and its presence was used to compare the performance of the two different antioxidant treatments in the fish oil. Includes Powerpoint.
Molecular Evolution Of Insecticidal Spore-Forming Bacteria, John Pool
Molecular Evolution Of Insecticidal Spore-Forming Bacteria, John Pool
Honors Theses
Molecular methods are increasingly being used to determine the phylogeny of microorganisms. This research was intended to determine phylogenetic relationships for bacteria of the species Bacillus thuringiensis and other members of the Bacillus cereus group. Each strain was analyzed by its sasp-B gene sequence to determine its species classification and relation to other strains studied. Results of this study indicated that according to the sasp-B gene tree, the species Bacillus thuringiensis is a paraphyletic with respect to both Bacillus cereus and Bacillus anthracis. Some unexpected results and implications for species designations are also discussed.
Oral Cancer Screening, Damon Omar Watson
Oral Cancer Screening, Damon Omar Watson
Honors Theses
Cancers of the oral cavity and pharynx have increased throughout the decades. Since oral cancer represents a small percentage of the total cancers in the United States, it is often overlooked. Though this is the case, the results of this cancer can be devastating. To address this issue, an Oral Cancer Screening was organized on August 14, 1996 at the West Michigan Cancer Center in Kalamazoo. This was a joint collaboration between the author, the West Michigan Cancer Center, and the Kalamazoo Valley Dental Society. This event allowed research to take place concerning the data obtained. Confidential results and information …
Sds Non-Acrylamide Polymeric Gel-Filled Capillary Electrophoresis For Molecular Size Separation Of Protein, Devon Andres
Sds Non-Acrylamide Polymeric Gel-Filled Capillary Electrophoresis For Molecular Size Separation Of Protein, Devon Andres
Honors Theses
Sodium dodecyl sulfide (SDS) non-acrylamide gel-filled capillary columns are a new technology being used for analysis and separation of biotechnology-derived proteins. This research was to compare this new technology to the current methods of SDS polyacrylamide gel electrophoresis (SDS-PAGE) and high-performance size-exclusion chromatography (HPSEC). The molecular mass of four different recombinant proteins were determined by two commercialized SDS non-acrylamide gel-filled capillary columns, SDS-PAGE, and HPSEC. The data obtained showed that the SDS non-acrylamide gel-filled capillary columns were compatible with the SDS-PAGE technique for molecular mass determination. HPSEC was shown to be unreliable for molecular weight determination. SDS non-acrylamide gel-filled capillary …