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Full-Text Articles in Physical Sciences and Mathematics
Utilizing Concept Mapping As A Teaching And Learning Tool To Prepare For The Science Taks Test, Rosa Linda Zuniga
Utilizing Concept Mapping As A Teaching And Learning Tool To Prepare For The Science Taks Test, Rosa Linda Zuniga
Theses and Dissertations - UTB/UTPA
Concept mapping was used with Donna High School students to determine its effect on the Texas Assessment of Knowledge and Skills (TAKS) test. Concept mapping was used with models such as the Sheltered Instruction Observation Protocol model (SIOP), the 5- E model, and the Learning Groups model. This measure was taken because the models used have not helped students improve their TAKS scores significantly. The findings of this research reveals that using the process of concept mapping together with the SIOP model helps students clearly see related concepts and motivates them to think more deeply. Students quickly realize what concepts …
Solid Phase Amide Synthesis Using Staudinger-Vilarrasa Coupling And Microwave Irradiation, Ryan Patrick Schmidtz
Solid Phase Amide Synthesis Using Staudinger-Vilarrasa Coupling And Microwave Irradiation, Ryan Patrick Schmidtz
Undergraduate Honors Thesis Collection
Amide bond formation is an already well documented area of organic chemistry, and is very useful in its application in medicine and pharmaceuticals. However, current methods have not been investigated with regards to optimization of reaction times, solvents, and energy sources. In addition, current methods also utilize toxic solvents to cleave the peptide from the solid phase resin. In our study, we combine the Staudinger and Vilarrasa coupling reactions with microwave irradiation to develop and optimize the synthesis of amide bonds through the use of a solid support. Instead of attaching the peptide to the solid support, our amide bond …
Investigating Ring Closing Metathesis Product Favorability By Varying The Alkyne Substituent On A Dienyne, Meagan E. Hinze
Investigating Ring Closing Metathesis Product Favorability By Varying The Alkyne Substituent On A Dienyne, Meagan E. Hinze
Undergraduate Honors Thesis Collection
Diene metathesis, which is also known as an olefin metathesis, has been very important for the development of synthetic strategies in organic chemistry since it's inception in the 1950s. The olefin metathesis reaction is when two alkenes exchange the carbons on their double bonds, thus producing two new carbon□arbon double bonds.
Optimization Of A Polydimethylsiloxane Based Passive Sampler Of Common Household Volatile Organic Compounds, Jennifer Lynn Osborne
Optimization Of A Polydimethylsiloxane Based Passive Sampler Of Common Household Volatile Organic Compounds, Jennifer Lynn Osborne
Undergraduate Honors Thesis Collection
Dangerous volatile organic compounds, or VOCs, can accumulate as indoor air pollution within homes causing health problems in the habitants. In order to determine the concentration of VOCs in such areas a field-deployable sampler is necessary. The focus of this work has been to develop an inexpensive, reusable, sensitive fielddeployable passive sampler for monitoring VOCs in indoor air. We have devised a sampler that uses polydimethylsiloxane (PDMS), which is a common inexpensive, nonpolar adsorbent. The sampler is comprised of an aluminum bottle coated with the PDMS. In operation, the coated portion is exposed to the air to be sampled. The …
Liquid Carbon Dioxide Extraction Of Various Food Flavors: Evaluation And Analysis, Deven Lee Shinholt
Liquid Carbon Dioxide Extraction Of Various Food Flavors: Evaluation And Analysis, Deven Lee Shinholt
Undergraduate Honors Thesis Collection
Sub- and supercritical carbon dioxide has been utilized as an extraction solvent for a variety of natural compounds. This requires the use of specialized high-pressure vessels. It was reported recently that common laboratory apparatus (centrifuge tubes) could be utilized in liquid carbon dioxide extractions obviating the need for specialized equipment. Various herbs and spices (including orange, lemon, lime, and grapefruit zest, oregano, rosemary, sage, spearmint, nutmeg, black peppercorns, cloves, caraway seeds, and vanilla beans) were used as substrates for liquid carbon dioxide extractions by this straightforward technique. The extracted oils, containing terpenes and terpenoids, were then analyzed through GC/MS. Liquid …
Development Of Novel Dart Tofms Analytical Techniques For The Identification Of Organic Contamination On Spaceflight-Related Substrates And Aqueous Media, Kathleen Loftin
Development Of Novel Dart Tofms Analytical Techniques For The Identification Of Organic Contamination On Spaceflight-Related Substrates And Aqueous Media, Kathleen Loftin
Electronic Theses and Dissertations
Organic contamination on spaceflight hardware is an ongoing concern for spaceflight safety. In addition, for the goal of analyzing for possible evidence of extra-terrestrial life, it is necessary to consider the presence of terrestrial contamination. This paper will introduce and evaluate a new method using a direct analysis real time (DART) ionization source paired with a high resolution time of flight mass spectrometer (TOFMS) for the determination of organic contamination involved in spaceflight hardware and ground support materials. This novel analytical technique has significant advantages over current methodologies. Materials analyzed in this study were historically considered as probable contaminants in …
Fabricating New Miniaturized Biosensors For The Detection Of Dna Damage And Dna Mismatches, N. Indika Perera
Fabricating New Miniaturized Biosensors For The Detection Of Dna Damage And Dna Mismatches, N. Indika Perera
ETD Archive
A large number of genetic diseases and genetic disorders are simply caused by base alterations in the genome. Therefore, developing efficient and cost effective techniques for routine detection of these alterations is of great importance. Different methods involving gel electrophoresis and Polymerase Chain Reaction have been widely employed, but majority of these methods are costly, time consuming, and lack throughput, creating a fundamental gap between the current state-of-the-art and desired characteristics of low-cost, high-speed, simplicity, versatility, and potential for miniaturization. In this study, we attempt to bridge this gap by developing new sensing platforms to detect DNA base mismatches and …
Raman Spectroscopy Of Body Fluids : A Nondestructive Identification Technique For Forensic Applications, Kelly Virkler
Raman Spectroscopy Of Body Fluids : A Nondestructive Identification Technique For Forensic Applications, Kelly Virkler
Legacy Theses & Dissertations (2009 - 2024)
The analysis of body fluid evidence during forensic investigations is a complicated process, yet it is a critical step in determining the key facts of a crime. There is no doubt that DNA analysis is an extremely useful tool that can identify a suspect or victim, but crime scene investigators must first locate and identify potential body fluid stains that can be collected for DNA analysis. Current screening tests are destructive to the sample and can give false positive results, so a nondestructive technique such as Raman spectroscopy, that can possibly confirm the presence of a particular fluid, could lend …