Open Access. Powered by Scholars. Published by Universities.®
Articles 1 - 10 of 10
Full-Text Articles in Entire DC Network
Nmos Process Compatible Ccd And Cid Optical Imaging Arrays, John Garfield Logan
Nmos Process Compatible Ccd And Cid Optical Imaging Arrays, John Garfield Logan
Digitized Theses
This work investigated the physical properties and fabrication feasibility of charge coupled devices (CCDs) and charge injection devices (CIDs) using nMOS integrated circuit design and fabrication techniques. Devices for both signal processing and optical imaging applications were designed, fabricated and analyzed. These latter circuits included both those using MOS gate regions and those using separate sensor diode areas for optical signal detection.;Sample CCDs and CIDs were designed in accordance with lambda based integrated circuit layout rules and fabricated using a two polysilicon layer nMOS process supplied through the facilities of Northern Telecom Electronics (Ottawa, Canada) and the Canadian Microelectronics Corporation …
Diffusivity Characteristics Of Glucose In Alginate Immobilization Matrices, Fahar Jehangir Merchant
Diffusivity Characteristics Of Glucose In Alginate Immobilization Matrices, Fahar Jehangir Merchant
Digitized Theses
Conventional techniques of measuring diffusivity (D{dollar}\sb{lcub}\rm e{rcub}{dollar}) in gel entrapment matrices are not practical due to the poor mechanical stability of such solids. A novel apparatus was therefore designed to measure D{dollar}\sb {lcub}\rm e{rcub}{dollar} and partition coefficient (K{dollar}\sb{lcub}\rm p{rcub}){dollar} of glucose in alginate gels using radiotracer techniques. In this method, a specially prepared, large, spherical alginate bead was mounted to a stainless-steel rod and the sphere immersed in a liquid phase of limited volume. By rotating the bead at high angular velocities, the rate of C{dollar}\sp{lcub}14{rcub}{dollar}-glucose uptake or release was measured using a scintillation spectrometer, under conditions of near ideal …
Theoretical And Experimental Studies On The Instability Of Charged Liquid Drops, Hany Mohamed Elghazaly
Theoretical And Experimental Studies On The Instability Of Charged Liquid Drops, Hany Mohamed Elghazaly
Digitized Theses
To be able to properly predict the breakup of highly charged liquid droplets, a complete understanding of their behavior at the Rayleigh limit is necessary. An analytical model has been developed for a conductive spherical drop charged to its Rayleigh limit which predicts the final state just after the breakup for both single and multi-sibling disintegrations. The numerical analysis of this model involves scanning all the possible radii of the sibling droplets and ensuring that the solutions satisfy the conservation of energy and Rayleigh limit criteria. For a drop unaffected by any external force, the results of this model show …
A Pseudoadiabatic Catalytic Reactor For The Conversion Of Methanol To Hydrocarbons, Alberto Ravella
A Pseudoadiabatic Catalytic Reactor For The Conversion Of Methanol To Hydrocarbons, Alberto Ravella
Digitized Theses
The Pseudoadiabatic Operation (PO) of a fixed-bed catalytic reactor is an operating regime in which the temperature profile is monotonically increasing with the axial coordinate. It can be achieved in co-currently cooled reactors where the heat transfer fluid is a non-boiling liquid. This mode of operation has intrinsic advantages with respect to the hot-spot temperature profile usually experienced by packed bed units for exothermic reactions, such as better control of the temperature distribution and much less parametric sensitivity.;The PO was demonstrated experimentally for the first time in a pilot-plant-scale unit converting methanol to hydrocarbons.;Theoretical developments of the PO concept are …
A Study Of Oseen Flow Using Integral Conditions, Serpil Kocabiyik
A Study Of Oseen Flow Using Integral Conditions, Serpil Kocabiyik
Digitized Theses
The primary objective of this work is to analyze the steady two-dimensional flow of a viscous incompressible fluid past a conformally-mappable cylinder in an unbounded field. The main concern is the correct satisfaction of the boundary conditions at large distances from the cylinder. It is shown that the steady-state asymmetrical flow problem needs careful examination, particularly with regard to the satisfaction of these conditions. A general method is developed to solve this class of problem, under the assumption that flow is governed by the Oseen linearized equations of motion. The method is based on satisfaction of the proper conditioning for …
Hydrodynamic Study Of Bubble Column Flotation For The Recovery Of Heavy Minerals From Oilsand Tailings, Mku Thaddeus Ityokumbul
Hydrodynamic Study Of Bubble Column Flotation For The Recovery Of Heavy Minerals From Oilsand Tailings, Mku Thaddeus Ityokumbul
Digitized Theses
A hydrodynamic study of bubble column flotation for the recovery of titanium and zirconium minerals from oilsand tailings has been carried out in a 0.06 m (i.d.) column. A beneficiation process for these tailings was also developed which ensures the recovery of rare earth minerals.;The optimum conditions for the recovery of these minerals were found to be at a frother concentration of 0.15% (v/v) pine oil and pH range of 8.3 to 11.7. Low recoveries were obtained at frother concentrations exceeding 0.2% (v/v) pine oil.;Individual phase hold-ups were estimated using the static pressure method. Flow regimes were identified using the …
The Behaviour Of Geotextile Reinforced Embankments, Kristopher Lorne Soderman
The Behaviour Of Geotextile Reinforced Embankments, Kristopher Lorne Soderman
Digitized Theses
The effect of geotextile reinforcement on the stability of granular embankments constructed on deposits of fibrous peat and/or soft clay is investigated using the finite element method. The method of analysis is shown to provide good agreement between calculated and observed performance of two published case studies of reinforced embankments. Analyses are performed for a number of hypothetical embankments and the results are used to develop simple design methods for geotextile-reinforced embankments constructed on fibrous peat and/or soft clay. The implications of the finite element results with regard to modified limit equilibrium analysis of reinforced embankments on soft clays are …
Lipid Production By Rhodosporidium Toruloides, Ginette Turcotte
Lipid Production By Rhodosporidium Toruloides, Ginette Turcotte
Digitized Theses
The effect of the concentration of nitrogen, temperature, pH and their possible synergistic effect on the production of lipids by Rhodosporidium toruloides ATCC 10788 were studied. In particular, the effect of these variables on the change in composition of the oil during fermentation was investigated.;Eight initial concentrations of nitrogen as NH{dollar}\sbsp{lcub}4{rcub}{lcub}+{rcub}{dollar} (from 10{dollar}\sp{lcub}-4{rcub}{dollar}M to 10{dollar}\sp{lcub}-2{rcub}{dollar}M) were supplied to 1 g/l of lean cells (fat content {dollar}\sim{dollar}7%) in shake flasks at 30{dollar}\sp\circ{dollar}C. The rates of lipid production, shortly after nitrogen-depletion, were found to increase from a constant value of 0.040 g/l.hr for (N) = 10{dollar}\sp{lcub}-4{rcub}{dollar} to 2 {dollar}\times{dollar} 10{dollar}\sp{lcub}-3{rcub}{dollar}M to a …
Dynamic Analysis Of Offshore Structures, Hisham Mohammed Mitwally
Dynamic Analysis Of Offshore Structures, Hisham Mohammed Mitwally
Digitized Theses
This study comprises three main parts: (1) Pile Driving Analysis. The conventional one dimensional wave equation analysis of the pile driving problem suffers from the empirical representation of the soil parameters. In this study, an improved one dimensional wave equation model is developed which accounts for wave propagation in the soil mass and thus gives more realistic prediction of the pile displacements. A three dimensional finite element analysis of the problem is also formulated and its results are compared with those of the one dimensional analysis. The finite element analysis is computationally very expensive which is not justified due to …
Kinetics Of Growth And Toxin Production By Zymocidal Saccharomyces Cerevisiae, John Blair Wallace
Kinetics Of Growth And Toxin Production By Zymocidal Saccharomyces Cerevisiae, John Blair Wallace
Digitized Theses
Zymocidal strains of Saccharomyces cerevisiae excrete protein toxins which attack and kill other sensitive contaminant yeast strains that might be present during fermentation. A systematic perusal of the literature revealed that very little or no research has been done on the kinetics of cell growth and zymocidal toxin production by S. cerevisiae, and its stability characteristics. This thesis represents the first attempt to study systematically, and under controlled conditions, the kinetic parameters of the zymocidal system.;In this study, batch and continuous steady-state culture techniques were used to study the affects of pH, temperature and initial glucose concentration on the production …