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.
Results
Showing 1 to 20 of 102 for “"Chemical interactions."”.
-
Mass transfer and chemical interactions in subduction zones
… zones by integrating petrological and geochemical constraints from exhumed high-pressure rocks and erupted arc magmas, high pressure-temperature laboratory experiments, and thermodynamic calculations. Chapters 2 and 3 investigate the fluid-mediated reactions between mafic and ultramafic …
-
Physical and Chemical Interactions in Liquid Metal Mixtures
Activity coefficients for the more volatile component have been determined for liquid solutions of the copper-lead, titanium-tin and titanium-copper systems. Activities were derived using a weight loss technique based on the Knudsen effusion method. Positive deviations from ideality occur for the …
-
Mass Transfer and Chemical Interactions in Subduction Zones
… zones by integrating petrological and geochemical constraints from exhumed high-pressure rocks and erupted arc magmas, high pressure-temperature laboratory experiments, and thermodynamic calculations. Chapters 2 and 3 investigate the fluid-mediated reactions between mafic and ultramafic …
-
Engineering physico-chemical interactions across drug delivery, agriculture and carbon capture
The interface between two phases often limits the efficiency of several phenomena. In drug delivery, viscous formulations are difficult to inject through medical needles as the no-slip boundary condition between the needle and the viscous drug product greatly resists fluid flow. In agriculture, the …
-
Chemical interactions between rainfall and northern red oak (Quercus rubra l.) foliage
Nutrient ion exchange was examined between simulated acid rain solutions and northern red oak (Ouercus rubra L.) leaves of trees growing in fertile, limestone-derived soil and less fertile, sandstone/shale-derived soil. Leaves harvested from trees growing on the fertile site had greater …
-
A study of chemical interactions between the Marcellus shale and attapulgite and bentonite clays
Chemical interactions occur between water based muds and shale formations. These shale-fluid interactions are often associated with problems that arise when drilling. This paper presents results from a study investigating chemical interactions that occurred between the Marcellus shale and …
-
Particle-chemical interactions and environmental chemodynamics of fine and ultrafine particles in a natural disaster scenario
The interactions of fine and ultrafine particles with chemicals play a dominant role in determining the mobility and availability of pollutants in the environment. Fine particles in sediments can sequester chemicals from the water column, and release volatile and semi-volatile organic compounds to …
-
Use of molecular dynamics simulations to study the impact of weak to strong non-covalent chemical interactions
… to study the role of van der Waals and Coulomb interactions on two fundamental processes, namely, gas-surface interactions and electrospray propulsion, respectively. For the gas-surface interaction work, we proved that conventionally used gas surface interaction models were not adequate in …
-
Differential spectrophotometric analysis of intravenous admixtures containing metaraminol with selected corticosteroids
… analysis to detect the occurrence of chemical interactions between two components of an intravenous admixture.</p>
-
Investigation of the Interactions Among Grass, Chlorophenols and Microbes
Studies were conducted to explore the interactions among rye grass, chlorophenols and microorganisms. The objectives were to examine some of the processes by which plants affect the fate of subsurface organic contaminants. The research was divided into three studies: interactions between live …
-
Effects of solution complexation on crystallization processes
… is a separation technique widely used in chemical processes to produce high-purity solid products. The impact of solution chemistry on the kinetics and thermodynamics of crystallization processes is neither well understood nor properly characterized. Therefore, there exists a need for …
-
Chlorhexidine Interaction with Microcrystalline Cellulose
… with bleach develop permanent stains due to chemical interactions with cellulose fibers. Previous research has identified compounds such as Parachloroaniline (PCA), which contribute to both toxicity and fiber degradation. This study aims to further analyze the breakdown products of …
-
The synthesis and host-guest activity of novel cyanoborate salts
… is a dynamic process based on distinct chemical interactions and not on passive fitting of a lock and key. Complex formation between host and guest molecules is often accompanied by conformational reorganisation, which makes it possible to engineer and fine-tune synthetic receptor …
-
An investigation into the minimum dimensionality required for accurate simulation of proton exchange membrane fuel cells by the comparison between 1- and 3-dimension models.
… fundamental models which reveal the physical and chemical interactions. While computational fluid dynamics simulations are available, the timeframe for solving these simulations renders them unfeasible in any rigorous FC design optimisation. The objective of the present investigation was to …
-
Improving Impact Properties of Novatein through Polymer Blending and Reactive Extrusion
… viscosity ratio, interfacial tension and chemical interactions. Novatein was blended with either elastomeric core-shell particles, polyethylene (PE), or biodegradable polybutylene adipate-co-terephthalate (PBAT) using twin-screw extrusion to allow for sufficient mixing and residence time …
-
Computational Investigation of Spin Traps Using Hybrid Solvation Models.
… of direct determination of solvent-spin trap chemical interactions. To examine this, hybrid models incorporating COSMO for long range effects and discrete solvent molecules for short range effects, at the DFT/B3LYP/6-31G* level of theory, have been used to study the stabilization and …
-
Colorimetric Sensor Array: Do I See What You Smell
We have developed and patented a unique chemical detection technology in which colorimetric changes in an array of dyes constitute a signal much like that generated by the mammalian olfaction system; each dye is a cross-responsive sensor. This technology uses a disposable printed array of …
-
Layered Double Hydroxides as Anion- and Cation-Exchanging Materials
… force for current and future research. The chemical interactions of LDH, with transition metallocyanides, have been a popular topic of investigation for many years, partly due to the use of powder x-ray diffraction and infrared spectroscopy as the main characterization tools. Each transition …
Page 1 of 6