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Showing 1 to 20 of 23 for “"ION-SELECTIVE ELECTRODES"”.
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Characterization of soil potassium with ion-selective electrodes
… (1) develop a potentiometric procedure of using ion-selective electrodes (ISEs) to determine soil exchangeable potassium (K) in soil suspensions, (2) compare and improve the ISE methods of determining soil potassium Q/I relationships, and (3) characterize the effects of experimental procedures …
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Bipolar Pulse Conductance Measurements With Ion-Selective Electrodes
… to monitoring of the calcium and fluoride ion-selective electrodes (ISEs) is presented as an alternative to the classical potentiometric technique. Bipolar pulse conductometric monitoring of ISEs does not require a real reference electrode; two voltage pulses of equal time duration, equal …
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Calcium ion-selective electrodes with covalently-bound sensor groups.
A review of the development of ion selective electrodes (ISE), with particular emphasis on calcium ISE, is presented. The utility, in terms of an increased electrode operational lifetime and opportunities for the enhancement of selectivity and sensitivity of a calcium ISE membrane with a …
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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 …
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Electrochemical Modulation of Peripheral Nerves Using Ion-Selective Electrodes
… stock which require physical access for restoration or replacement. In this thesis, I examine the ion-selective membrane (ISM), a filter that discriminately transports single ions within mixed electrolytes, whose operation in ion delivery platforms does not suffer from the fundamental restriction …
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An Investigation of the Behaviors of Calcium and Potassium Ion-Selective Electrodes
Made available in DSpace on 2014-12-10T22:38:19Z (GMT). No. of bitstreams: 1 7309898.pdf: 4579381 bytes, checksum: 0332c9287d1fdad27327353189125611 (MD5) Previous issue date: 1972
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Characterization of ion-selective electrodes for an on-field soil nutrient analysis system
… is an established need for more careful application of soil nutrients and fertilizer to maximize crop yield for an ever-growing population. This study focuses on the manufacturing and characterization of ion-selective electrodes (ISEs) to further study if they could be used to reliably measure …
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Development and Characterisation of Solid-State Ion-Selective Electrodes, and their Application to Sweat Analysis for Cystic Fibrosis Diagnosis
… Early diagnosis facilitates early implementation of therapy, which can significantly improve the prognosis and life quality of the affected patient. The gold standard diagnostic test for CF is the Quantitative Pilocarpine Iontophoresis Test (QPIT) for the sweat electrolytes sodium and …
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Electro-chemical stimulation of neuromuscular systems using ion-selective membranes : flexible device fabrication and motor unit recruitment order
… high lifetime medical costs. Direct nerve Functional Electrical Stimulation (FES) induces muscles to contract by electrically stimulating nerves, which shows promise for clinical applications in restoring muscle function in SC. However, Functional Electrical Stimulation is limited by the lack of …
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ΕΦΑΡΜΟΓΕΣ ΤΩΝ ΕΚΛΕΚΤΙΚΩΝ ΗΛΕΚΤΡΟΔΙΩΝ ΣΕ ΜΕΛΕΤΕΣ ΑΛΛΗΛΕΠΙΔΡΑΣΗΣ ΔΙΑΦΟΡΩΝ ΙΟΝΤΩΝ ΜΕ ΤΗΝ ΑΛΒΟΥΜΙΝΗ
… MAIN SCOPE OF THIS DOCTORAL THESIS WAS TO APPLY ION- SELECTIVE ELECTRODES (ISE) TO THE STUDY OF THE BINDING OF VARIOUS IONS TO ALBUMIN. MORE SPECIFICALLY,THE FOLLOWING STUDIES WERE CARRIED OUT: 1: THE PICRATE-ALBUMIN INTERACTION WASSELECTED AS A MODEL TO STUDY THE DEPENDENCE OF THE BINDING …
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ΜΕΤΡΗΣΗ ΧΑΡΑΚΤΗΡΙΣΤΙΚΩΝ ΠΟΙΟΤΗΤΑΣ ΕΚΛΕΚΤΙΚΩΝ ΗΛΕΚΤΡΟΔΙΩΝ ΙΟΝΤΩΝ ΚΑΙ ΚΙΝΗΤΙΚΕΣ ΑΝΑΛΥΣΕΙΣ ΜΕ ΔΙΑΤΑΞΕΙΣ ΕΛΕΓΧΟΜΕΝΕΣ ΑΠΟ ΜΙΚΡΟΥΠΟΛΟΓΙΣΤΗ
THE CONSTRUCTION OF TWO COMPUTERISED POTENTIOMETRIC SYSTEM IS DESCRIBED. THESE TWO SYSTEMS CONSIST OF COMMERCIALLY AVAILABLE UNITS AND HOMEBUILT INTERFACE CIRCUITS. THE FIRST SYSTEM, CONTROLLED BY AN ALTAIR 8800B MICROCOMPUTER IS USED FOR AN AUTOMATED, RAPID EVALUATION OF CERTAIN CRUSIAL QUALITY …
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Transport phenomena in hydrogel membranes
In this thesis the factors surrounding the permeation of alkali and alkaline earth metal salts through hydrogel membranes are investigated. Although of relevance to aqueous separations in general, it was with their potential application in sensors that this work was particularly concerned. In order …
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Electrochemical Tape-and-Paper-Based Sensor for the Quantification of Potassium
… therefore, developing new potassium quantification methods would aid in advancing preventative care. Current methods of quantifying potassium mainly rely on the use of glass ion-selective electrodes which are costly, fragile, and requires frequent maintenance and recalibration. For faster and …
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DEVELOPMENT OF NOVEL SENSORS FOR ANIONS OF ENVIRONMENTAL INTEREST
A range of ion-selective electrodes (ISEs) for the determination of nitrate has been produced based upon rubbery membranes having covalently bound betaine salt sensor molecules. The best performing electrode contained N,N,N-triallyl leucine betaine (6.5 % m/m) covalently bound to …
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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 …
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Development of a combined multi-sensor/signal processing architecture for improved in-situ quantification of the charge balance of natural waters
This thesis details the design, implementation, and testing of a new electrochemical instrument for the in situ measurement of both major and environmentally relevant minor ions in fresh waters, namely Na+, K+, Ca2+, Mg2+, NH+4 , Cl-, NO-3 , and SO2-4 . The instrument is built on a hybrid …
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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 …
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Development Of Electrochemical Sensors And Non-Covalent Monolayer Modification Of Graphene
This dissertation is focused on two main research topics. One is the development of novel electrochemical sensors (Chapter 1-5), and the other is the non-covalently modification of graphene with monolayers of receptors, also in view of the development of chemical sensors (Chapter 6-7). Good …
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Vergleich des Phylax-Ion-Analyser mit der konventionellen ionenselektiven Laborbestimmung von Natrium und Kalium im Serum unter Standard- und Feldbedingungen
… entwickelten mobilen Handapparat, den Phylax Ion Analyser, unter Labor- und Feldbedingungen, im Sinne der ApproTech, zu untersuchen. Dieser bestimmt netzunabhängig Natrium und Kalium im Serum mit Hilfe der Methode der Ionenselektiven Elektroden. In den zunächst in Deutschland von 460 …
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