Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 267 for “"repulsion"”.
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Dscam Switches Slit Repulsion To Mild Attraction Via Robo Receptors
… to proteolytically processed Slit andconverts repulsion to mild attraction in the presence of Robo receptors. Our workalso suggests that, as seen for other ligands, Slit can act as both an attractantand repellent via distinct receptors, and indicates how the complexity of thenervous system can …
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Balancing growth and repulsion: Slit proteolysis generates diverse signals in axon guidance
… all CNS axons collapse onto the midline. The repulsion conducted by Slits is essential to maintain separation of axons on the left and right sides of the body, conducting coordinated movement, and survival. Slits are proteolytically processed in the extracellular space into N-terminal (Slit-N) …
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Measuring the electrostatic repulsion forces between glycosaminoglycans using the atomic force microscope
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Materials Science and Engineering, 1999.
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Raphael Montañez Ortiz and Alternative Art Spaces, 1966–1971: From Repulsion to Exaltation
<p>In the 1960s, Brooklyn-born Puerto Rican artist Raphael Montañez Ortiz built a successful and provocative career in New York. Throughout the decade, Ortiz created sculptures, performances, and events that were part of a sustained investigation into how embodied destructive and uncomfortable …
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Correlations in the one-dimensional Hubbard model
… of varying temperature, band filling, Coulomb repulsion and external magnetic field are investigated. Two-site correlations for non-half-filled band fillings are calculated for the first time. Some exact relations between correlation functions are derived by electron-hole symmetry. Results …
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Hydrodynamic Simulations of Colloidal Gels: Microstructure, Dynamics, and Rheology
… attraction and long-range electrostatic repulsion are studied using equilibrium predictions and a new algorithm for dynamic simulations. A focus is made on those combinations of attraction and repulsion that lead to the formation of gels. The effects of varying the strength of attraction …
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Low Frequency Microscale Energy Harvesting
… electromagnetic VEH concept based on double-repulsion configuration in the moving magnet composite was studied. Computational modeling clearly illustrated the advantages of the double-repulsion configuration over the single-repulsion and no-repulsion configurations. Based on the modeling …
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On Methods for Detecting Linkage from Analysis of Genetic Covariance
… epistasis was found to mimic the effects of repulsion linkage. Furthermore, the use of an approximate expectation for variances and covariances m Gates' test caused an upward bias in both additive and dominance effects involving linkage. Twenty genetic models were simulated with eight values …
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Understanding ionic transport in the macrostructure of polysaccharide bound electrodes for capacitive deionization
… this goal by eliminating the effects of co-ion repulsion. Previous research conducted in our lab, showed how the use of charged biodegradable polysaccharide compounds, namely chitosan (CS) and carboxymethylcellulose (CMC), as anodic and cathodic electrode binders respectively, improved charge …
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Novel methods for fabrication of non-close-packed structures through colloidal self-assembly
… stabilized by interparticle electrostatic repulsion. However, strong electrostatic potentials prevent nucleation of new structures. When the electrostatic potential is strongly attractive, particles coagulate into a disordered structure; if it is strongly repulsive, known processes can …
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Relationships Between Poe's Imagery and His View of the Universe
… thesis. Poe describes the universe in terms of repulsion and attraction, forces that work on both the physical and the spiritual dimensions. Repulsion has caused a moving away from unity; consequently, Poe's images reflect the superiority of the past and the inferiority of man's present …
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Mechanism of the Neural Cell Adhesion Molecule and Mode of Polysialic Acid Adhesive Inhibition
… adhesion by increasing the intermembrane repulsion. This inhibitory effect was dependant on both polysialic acid surface density and on ionic strength.
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Novel Non-Repulsive Outcomes From Ephrin-B Reverse Signaling
… has long been established as one of cell-cell repulsion, elicited through a localized breakdown of the actin cytoskeleton. In contrast to this dogma, I have found that ephrin-B reverse signaling is instead necessary for mediating cell-cell adhesion events during several critical midline closure …
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Molecular mechanics of cartilage : quantification of GAG electrostatic interactions via high-resolution force spectroscopy
Intermolecular repulsion forces between negatively charged glycosaminoglycan (CS-GAG) macromolecules are a major determinant of cartilage biomechanical properties. It is thought that the electrostatic component of the total intermolecular interaction is responsible for 50-75% of the equilibrium …
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A Study on Vibration-induced Particle Motion under Microgravity
… force from attraction in low viscosity fluids to repulsion in high viscosity liquids. Moreover, the repulsion force has been observed to increase with an increase in the fluid viscosity and the fluid cell amplitude. A numerical code, Partflow3d, has also been used to predict the vibration effects …
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Electronic Structure in the Organic-based Magnet [Feᴵᴵ(TCNE)(NCMe)₂][FeᴵᴵᴵCl₄] using the Orthogonalized Linear Combination of Atomic Orbitals Method with Hubbard U
… is used to account for on-site atomic Coulombic repulsion and exchange correlation interactions for the d orbitals of the FeII atoms. Applying the Hubbard U parameter results in an increased band gap and clear spin splitting.
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Engineering Approximations for Chemical Kinetics
… are encountered. However, including a Pauli repulsion term in the derivation of the Marcus equation leads to a simple equation which does extend out to very exothermic and endothermic reactions. The new model agrees with the Marcus equation at all other intermediate energies.
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The Cauchy problem for the Diffusive-Vlasov-Enskog equations
… Coulomb-type potential is added to the hard core repulsion of the Enskog equation, along with a velocity diffusion. By choosing the diffusing term of Fokker-Planck type with or without dynamical friction forces. The Cauchy problem for the Diffusive-Vlasov-Poisson-Enskog equation (DVE) and the …
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Engineering the Structure of the Human Acidic Fibroblast Growth Factor to Enhance its Stability and Cell Proliferation Activity
… of this instability is strong electrostatic repulsion created by a dense cluster of positively charged amino acids near the c-terminus. This instability leads to proteolytic degradation of the unfolded protein, which severely limits the bioavailability of hFGF1. To counteract this …
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Interfacial behavior of RNA-free MS2 bacteriophage particles
… strength suggests an important role of steric repulsion. Using a Quartz Crystal Microbalance, RNA-free MS2 attachment efficiency was found to be higher than MS2. This can be explained by more steric repulsion by the untreated MS2 particles. Similarity in electrophoretic mobility and aggregation …
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