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 21 for “"Ion-Selective Electrode."”.
-
Development of planar patch clamp with potentiometric calcium ion-selective electrode
<p>Ion channels are proteins in cell lipid bilayer membranes and act as pores which can adopt closed and open states, thus gating the flow of ions in and out of the cell. Patch clamp technology has been the proven standard for fundamental studies of ion channel activities. However, the technique …
-
DEVELOPMENT AND TESTING OF A FLEXIBLE PLASTIC HYDROGEN ION-SELECTIVE ELECTRODE FOR IN VIVO pH MEASUREMENTS OF AIRWAY SURFACE LIQUID
… of Caucasian ancestry. It is caused by mutations in the cystic fibrosis transmembrane conductance regulator (CFTR) gene, which encodes a transepithelial transporter responsible for ion transport and maintaining fluid homeostasis. These mutations impair chloride and bicarbonate transport to …
-
CADMIUM(II), LEAD(II), AND COPPER(II) COMPLEXATION BY FULVIC ACIDS DERIVED FROM SOIL AND WATER: ION-SELECTIVE ELECTRODE AND SPECTROFLUOROMETRIC STUDIES
<p>This study describes complexation of metal ions by fulvic acid, the acid soluble fraction of organic matter found in soils (SFA) and water bodies (WFA). Such complexation affects the toxicity and geochemical mobility of heavy-metal ions. All the work was performed with two previously isolated …
-
Novel Potentiometric Enzyme Electrode Based on the Fluoride Ion-Selective Sensor.
… a potentiometric procedure for the determination of hydrogen peroxide using an immobilized enzyme and a fluoride ion-selective electrode. The reaction between hydrogen peroxide and certain organo-fluoro compounds is catalyzed by the enzyme horseradish peroxidase to release fluoride ions.
-
Evaluation of Negative Energy and Mineral Balance in Periparturient Holstein-Friesian Cattle
… multiparous cattle due to their high milk production. A large amount of fat and protein is mobilized in order to address the energy deficit during the periparturient period. The ability to accurately monitor energetics and electrolytes status using accurate, rapid, and low cost point-of-care …
-
Fluorine Dating Of Human Bone At The Pre-Columbian Maya Cemetery Of Caves Branch Rockshelter, Belize
This thesis tests the ion-selective electrode fluorine dating method on the remains from the Maya mortuary site Caves Branch Rockshelter (CBR) in Belize. CBR is a cemetery containing at least 400 burials from the late Preclassic to the Postclassic periods. The intensive use and reuse of the site …
-
Distribution and causes of high fluoride groundwater in the western Bushveld area of South Africa
… in groundwater originated from the dissolution of fluorine-bearing minerals, principally fluorite, mica, amphibole and apatite, and that high F- groundwater would be hosted in rocks with a high fluorine (F) content. It was further hypothesised . that groundwater residence time, rare …
-
The relationship between cupric ion activity and the toxicity of copper to phytoplankton
The purpose of this investigation is to quantify the relationship between cupric ion activity and the toxicity of copper to phytoplankton and further to study the effect on copper toxicity of naturally occurring organic ligands. Culture experiments with an estuarine diatom Thalassiosira pseudonana …
-
Conversion kinetics of oxyfluoride-derived YBCO films
… crystal substrates by metal organic deposition (MOD) process. Glassy films were converted to epitaxial YBCO films, by heating in wet atmosphere of N2/02 mixture. A novel technique was used to determine the rate of conversion of films from glassy state to crystalline YBCO films. In this …
-
Modeling contaminant transport in polyethylene and metal speciation in saliva
… and/or aged in chlorinated water. Tree regression was used to select variables, and linear regression was used to develop predictive equations for contaminant diffusivity and solubility in polyethylene. Organic contaminant properties had greater predictive capability than polyethylene …
-
Pyrogallo4arenes: a synthetic investigation
… work involved the study of the acid condensation of pyrogallol with acataldehyde. The product formed, pyrogallol[4]arene, is present as a mixture of two isomers, the rccc cone and the rctt flattened partial cone conformations, which could be separated using an extractiodreprecipitation …
-
Screen-printed ion selective electrodes for soil ion detection
… lack an available, affordable, usable, and actionable means to diagnose soil health, which is a prerequisite for judicious application of fertilizer. Although government labs and mobile kits are available, these fail to meet the aforementioned qualities; as a result fewer than 5% of rural …
-
Interactions between solutes in displacement solutions and oil bearing rocks.
Studies of adsorption of several surfactants from aqueous solution onto kaolin have been made, such as might be employed in an enhanced oil recovery process. Investigations of the surfactants were carried out with regard to pH, ionic strength, temperature, the addition of short chain aliphatic …
-
Understanding of Ammonia Transport In Pem Fuel Cells
<p>This dissertation investigated ammonia (NH3) as a fuel contaminant to the anode in Proton Exchange Membrane Fuel Cells (PEMFCs). Since NH3 is fed to the anode in a gas phase and transferred to the cathode, the effect of a contaminant is distributed through MEA and quite complicated. This study …
-
Mining biological diversity to optimize chlorite dismutase for water treatment
… approaches, where specialized applications are required. In this work, enzymatic treatment of perchlorate-contaminated drinking water is examined as a test case. A diverse superfamily of enzymes, known as chlorite dismutases (Clds), catalyzes the final reaction of biological perchlorate …
-
Determination of Conditional Stability Constants of Copper(ii) Complexes With Naturally Occurring Macromolecules
A critical evaluation was made of models currently in use for determining stability constants of metal complexes with humic and fulvic acids. Most models are shown to reduce to forms based on Adair's equation, in which the macromolecule is assumed to be the central group and where binding is …
-
DESORPTION OF COPPER FROM ILLITE CLAY USING A CHELATING RESIN ENCAPSULATED BETWEEN POROUS MEMBRANES
… studies have established the need for information concerning species distribution of heavy metals in the environment. In aquatic environments, the nature of trace metals, whether free, adsorbed, or complexed controls impact on biota. Often, major portions of the trace metals present in an …
-
Neutral receptors for anion recognition: synthesis, selectivity studies and transport properties
… compounds containing urea groups that can function as selective anion receptors and efficient anion transmembrane transporters. Two new asymmetric ureidic receptors L1 (1-(1H-indol-7-yl)-3- (quinolin-2-yl)urea) and L2 (1-(quinolin-2-yl)-3-(quinolin-8-yl)urea), shown in Figure 1, have been …
-
Development of the gel plating process for selective gold metallization
A Gel Plating Process for selective gold metallization was developed in this thesis. The Gel Plating Process selectively plates metal on catalytic features without exposing sensitive area, of the substrate surface to a corrosive plating bath. This process utilizes an electroless plating bath and …
-
Distribution and Transport of Nitrate in an Unconfined Alluvial Aquifer, Carson Valley, Douglas County, Nevada, 2009.
… for drinking water and agricultural irrigation (although the Carson River is also used for irrigation). Since the 1970's, there has been a rapid increase in population in several parts of the valley with little economic incentive for commercial builders to construct centralized wastewater …
Page 1 of 2