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Articles 61 - 67 of 67
Full-Text Articles in Life Sciences
Super Collision Energy Transfer Studies In Single Collisions Between Vibrationally Hot Benzene Like Molecules And Ground State Bath Molecules: The Effect Of Physical Properties Of Donor And Bath Molecules On Super Collision Energy Transfer, Kilyoung Kim
Theses and Dissertations
This research is focused on single-collision energy transfer events between highly vibrationally excited benzene-like donor molecules and small bath molecules, CO2 and N2O in the vibrational ground level. Measuring how much energy is transferred from donors to bath molecules was accomplished by probing bath molecules scattered into specific-rotational states using a tunable Δv=0.0003 cm-1 solid state diode laser. The normalized energy transfer probability distribution function, P(E,E'), determined from energy gain information, is very useful in comparing collisional energy transfer efficiency between various collision systems. P(E,E') is also used to investigate the effects of donor and bath physical properties on collisional …
Role Of Wnt5a And Possible Pathway Of Action Through Ror2 In Proximodistal Outgrowth Of The Limb, Tiffanie M. Dahl
Role Of Wnt5a And Possible Pathway Of Action Through Ror2 In Proximodistal Outgrowth Of The Limb, Tiffanie M. Dahl
Theses and Dissertations
Despite over 60 years of study, the molecular pathways and mechanisms governing limb outgrowth and patterning remain poorly understood. Fgfs expressed in the AER are known to be necessary and sufficient for proximodistal limb outgrowth and have been proposed to have a chemoattractive role. Wnt5a is a secreted factor which is expressed in a gradient in the distal limb with the highest concentration next to the AER. The presence of the AER is necessary to establish this gradient. Expression of Wnt5a in a concentration dependant manner can be induced in the limb through the implantation of a bead soaked in …
A Novel Use Of Digoxin Immune Fab Fragment In Identification And Isolation Of An Endogenous Digitalis-Like Factor Found In Preeclampsia, Moana Lee Hopoate-Sitake
A Novel Use Of Digoxin Immune Fab Fragment In Identification And Isolation Of An Endogenous Digitalis-Like Factor Found In Preeclampsia, Moana Lee Hopoate-Sitake
Theses and Dissertations
The mechanisms mediating the hypertension of preeclampsia (PE) are unclear. Endogenous digitalis-like factors (EDLFs) are specific sodium pump (SP) inhibitors implicated in essential and experimental hypertension, but they have not been fully explored in the setting of PE. This study uses a digoxin antibody Fab fragment to address the question of whether such factors are present and increased in PE, to investigate a possible treatment of PE, and to isolate and characterize all EDLFs present in PE. Sera and placenta from women with PE did show a significant increase in SP inhibition in comparison to women with normal pregnancy and …
Surface Modification, Fabrication, And Characterization Of Silicon, Polymer, And Nanotube Composite Materials, Lei Pei
Theses and Dissertations
In my research, I have performed many characterization and fabrication experiments that are based on tools of analytical chemistry, materials chemistry, and surface science. My research projects are as follows. (1) Fabrication of transparent polymer templates for nanostructured amorphous silicon photovoltaics was done using low-cost nanoimprint lithography of polydimethylsiloxane. This approach provides a test bed for absorption studies in nanostructured film geometries and should result in improved light capturing designs in thin-film solar cells. Nanopatterned polymer films were characterized by scanning electron microscopy and optical measurements. (2) A straightforward method for fabricating freely suspended, thin, carbon nanotube (CNT) membranes infiltrated …
A Comparison Of The Effectiveness Of Two Free Throw Shooting Methods, Andrew J. May
A Comparison Of The Effectiveness Of Two Free Throw Shooting Methods, Andrew J. May
Theses and Dissertations
The purpose of this study was to compare the effectiveness of two free throw shooting methods, the Ed Palubinskas Method (PM) and the Free Shoot Method (FSM), and their ability to improve free throw shooting accuracy. The experimental group, using the PM, and the control group, using the FSM, shot the same amount of free throws over a 13 week period. Subjects were 33 male intermediate basketball students at Brigham Young University. Subjects in both groups shot 26 free throws twice a week. Subjects were tested once every other week by shooting and recording the amount made out of nine …
Development Of Monolithic Stationary Phases For Cation-Exchange Capillary Liquid Chromatography Of Peptides And Proteins, Xin Chen
Theses and Dissertations
This dissertation focuses on the preparation of polymeric monolithic capillaries for ion exchange chromatography of peptides and proteins, since polymeric monoliths have shown promise for providing improved protein separations. Characteristics of monolithic columns include low back pressure, simplicity of fabrication and biocompatibility. Preparation of strong and weak cation-exchange monolithic stationary phases in 75 μm I.D. capillaries by direct in situ copolymerization was achieved using various functional monomers including sulfopropyl methacrylate, phosphoric acid 2-hydroxyethyl methacrylate, bis[2-(methacryloyloxy)ethyl] phosphate and 2-carboxyethyl acrylate with polyethylene glycol diacrylate and other PEG materials. The resulting monoliths provided excellent ion exchange capillary LC of peptides and proteins …
Species Trees And Species Delimitation With Multilocus Data And Coalescent-Based Methods: Resolving The Speciation History Of The Liolaemus Darwinii Group (Squamata, Tropiduridae), Arley Camargo Bentaberry
Species Trees And Species Delimitation With Multilocus Data And Coalescent-Based Methods: Resolving The Speciation History Of The Liolaemus Darwinii Group (Squamata, Tropiduridae), Arley Camargo Bentaberry
Theses and Dissertations
The inference of species boundaries and phylogenetic relationships are fundamental for evolutionary, ecological, and conservation studies. The resolution of species boundaries and the inference of phylogenetic relationships among species are required to define the units of analysis and to find the most closely related units for evaluating alternative models of speciation. I highlight lizards as model organisms for ecological and evolutionary studies, emphasizing their contributions to advances in understanding linkages between phylogeography and speciation. In this dissertation, I focus on the phylogenetic relationships of the lizards in the Liolaemus darwinii group, and the species boundaries of a nested clade within …