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 30 for “"Deionised water"”.
-
Coupling source term, mineral reactivity and flow in radionuclide transport
… considers the dissolution of the waste glass in deionised water at 40 and 90 oC and circum-neutral pH. Experiment Part 2 considers the dissolution of the waste glass in simulant groundwaters, with similar compositions to groundwaters of Callovo-Oxfordian clay (lower-strength sedimentary rock …
-
The Separation of Carbohydrates by Continuous Production Scale Chromatography
… calcium form, was used as the stationary phase. Deionised water was the mobile phase. For what is believed to be the first time, a complete separation of a fructose-glucose mixture into two 99.9% pure products was achieved continuously in one pass through the equipment. The effects of feed …
-
On the fundamental mechanisms & optimisation of ultrasonic assisted liquid phase exfoliation of two dimensional nanomaterials
… liquid media alternative to NMP, such as water or water-based solutions for ULPE. However, in order to propose such a solution, the fundamental mechanisms pertaining to ULPE must first be fully understood. There are a multitude of complexities of liquid exfoliation of bulk layered …
-
Continous annular chromatography for the separation of carbohydrate mixtures
… relative affinity for the packing and the deionised water mobile phase describes a characteristic helical path as it progresses from the stationary feed point to the bottom of the rotating bed. Each solute then elutes from the annulus at a different angular distance from the feed and …
-
Continuous chromatographic biochemical reaction-separation
… A dilute stream of the appropriate enzyme in deionised water was used as the eluent stream. The effect of switch time, feed concentration, enzyme activity, eluent rate and enzyme to feed concentration ratio on the combined bioreaction-separation were investigated. For the invertase reaction, …
-
Geometric and numerical optimisation of single- and two-phase convective heat transfer in microchannel heat sinks
… heat fluxes (critical heat fluxes) is necessary. Deionised water was used as the working fluid because of its thermal advantage (high thermal conductivity, high specific heat), availability and environmental friendliness compared to other fluids like refrigerants. Aluminium was used as the heat …
-
A study on wettability properties of rutile-phase TiO2 nanostructure film
… nanostructure by mixing hydrochloric acid (HCl), deionised water (DI) and titanium (IV) butoxide (TBOT). The effects of the duration of the hydrothermal process, the volume of HCl, the volume of TBOT as well as the use of surfactant hexadecyltrimethylammonium bromide (HTAB) toward the synthesis …
-
Fluid transport and entropy production in electrochemical and microchannel droplet flows
… are presented for evaporation and de-pinning of deionised water and toluene droplets in rectangular microchannels fabricated from Su-8 2025 and 2075.
-
The physico-chemical and biological analysis of microbial biosurfactants (BSs) for applications towards cancer therapies, wound healing dressings and drug delivery
… formulated in the form of niosomes initially in deionised water, which was followed by formulation of R-90 rhamnolipids (BS1c), REWOFERM SL ONE (BS4a), REWOFERM SL 446 (BS4b) and BS2 in PBS buffer and characterised for size, size distribution, zeta potential, ATR-FTIR, XRD and SEM in transmission …
-
Biosynthesis and separation of dextran fructose mixtures in a chromatographic reactor
… phase consisted of diluted dextransucrase in deionised water. Initial experiments were carried out on a reactor separtor which had an internal diameter of 0.97cm and length of 1.5m. To study the effect of scale up the reactor diameter was doubled to 1.94cm and length increased to 1.75m. The …
-
The cross-flow chromatographic separation of carbohydrate mixtures
… at the upper surface of the column packing. Deionised water as eluent is also introduced to the upper surface of the packing. Each component in the feed mixture has a different retention time within the resin. The rate of travel of each solute combined with the rotation of the annulus causes …
-
Phytoplankton induced changes of air bubble residence time in seawater
… artificially entrained by ships, remain in the water for different periods of time. Knowledge of the factors accounting for the differences in air bubble residence time (BRT) is essential for understanding processes of air sea-gas exchange as well as for the detection of underwater ship wakes in …
-
A study of liquid-liquid extraction in a sieve plate column
… used was Clairsol `350' (dispersed) - acetone - deionised water (continuous) with either direction of mass transfer. Drop size distributions were best described by the functions proposed by Gal-or, and then Mugele-Evans. Using data from this study and the literature, correlations were developed …
-
Demulsification and recycling of spent oil based drilling fluid as nanofiller for polyamide 6 nanocomposites.
… phase-separation of this waste into oil, water and solid components was successfully carried out in addition to recycling the solid phase into PA6 nanocomposite materials. Initial characterisation of the untreated waste was carried out by Fourier Transform Infra Red (FTIR) for total …
-
Geochemistry of artificial groundwater recharge into the Kopoasfontein breccia pipe near Calvinia, Karoo
Artificial groundwater recharge has been proposed as an innovative strategy for managing the scarce water supplies of the town of Calvinia, near the edge of the Karoo, South Africa. Surplus runoff water from the town dam or groundwater from boreholes in weathered shale aquifers would be injected …
-
An investigation into the flotation response of sperrylite (PtAs2) by comparative evaluation of crystal structure and bonding atoms
… arsenopyrite in the presence of synthetic plant water with and without collectors. Novel collectors were tested to establish the molar energy of interaction with sperrylite using isothermal titration calorimetry and this was compared to those determined by molecular modelling computations. The …
-
Combined bioreaction and separation in a simulated counter-current chromatographic bioreactor-separator system
… During these experiments the eluent was deionised water and the enzyme was introduced into the system through the same port as the feed. The galactose produced was retarded and moved with the stationary phase to be purge as the galactose rich product (GalRP) while the glucose moved with …
-
Bacterioplankton dynamics in surface waters of the north-eastern (sub-)tropical Atlantic Ocean affected by Aeolian dust
… deposition.<br/>Firstly, the region’s surface water bacterioplankton community was compared with adjacent<br/>regions in terms of metabolic activity, by measuring the uptake rates of radioactively labelled<br/>amino acids (3H-leucine and 35S-methionine) as a proxy for bacterial production. …
-
Kinetic and mass transfer studies of ozone degradation of organics in liquid/gas-ozone and liquid/solid-ozone systems.
… adsorption step but liquid rate controls the water treatment step. Ozone desorption with pure deionised water was studied. The water flow rate was found to accelerate the desorption rates but pH was found to decrease the desorption rates. In contrast, the effect of pH was insignificant in the …
-
Design, Production and Characterisation of Anisotropic Collagen Scaffolds for Cardiac Tissue Repair
… in *E* and σ<sub>crit</sub> after 30 days in deionised water. Cyclic compressive and tensile loading regimes were designed to reflect the cardiac contraction and relaxation. *E* degraded rapidly in the first 100 cycles under cyclic compressive loading, but only decreased slightly under cyclic …
Page 1 of 2