| Molecularly Imprinted Ionomers |
21 MAY 2003 |
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| Authors:
George M. Murray; Glen E. Southard; JOHNS HOPKINS UNIV LAUREL MD APPLIED PHYSICS LAB
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 | Ionomers have been defined as copolymers that have a certain proportion of ionic groups. The ionic groups have a significant effect on the mechanical properties of the copolymers. This is generally due to aggregation of ions in a low dielectric medium. The primary result is to restrict chain motion and raise the glass transition temperature. These attributes have relevance to molecular imprinting, since restricted chain motion should help preserve the ... |
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| The Influence of Diffusion Fluxes on the Detection Limit of the Jalpaite Copper Ion-Selective Electrode |
02 OCT 2001 |
7 pages |
| Authors:
Alberto Zirino; Ignacio Rivera; Roland De Marco; Bobby Pejcic; SPACE AND NAVAL WARFARE SYSTEMS CENTER SAN DIEGO CA
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 | It has been suggested that electrode dissolution and the concomitant saturation of the electrode's diffusion layer restricts the detection limit of the jalpaite Cu ion-selective electrode (ISE) to samples with total Cu levels above 10(exp-5) mol dm(exp -3) [1, 2]. This article will use rotating disk electrode (RDE) data for San Diego Bay seawater and Fick's law of diffusion to demonstrate that the static commercial Orion Cu ISE (employing a ... |
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| A Fatality Caused by Hydrogen Sulfide Produced from an Accidential Transfer of Sodium Hydrogen Sulfide into a Tank Containing Dilute Sulfuric Acid |
NOV 2000 |
7 pages |
| Authors:
Arvind K. Chaturvedi; Dudley R. Smith; Dennis V. Canfield; FEDERAL AVIATION ADMINISTRATION OKLAHOMA CITY OK CIVIL AEROMEDICAL INST
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| The National Transportation Safety Board has an agreement with the Federal Aviation Administration (FAA) that the FAA's Civil Aeromedical Institute (CAMI) provide toxicological services for selected surface transportation accidents. Under this agreement, postmortem biosamples from a hazardous chemical accident fatality were submitted to CAMI for toxicological evaluation. The victim succumbed from breathing the hydrogen sulfide (H2S) gas produced by an accidental transfer of sodium hydrogen sulfide (NaHS) from a tanker ... |
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| 10TH International Meeting on Lithium Batteries "Lithium 2000", Held in Como, Italy, on May 28-Jun 2, 2000 |
02 JUN 2000 |
459 pages |
| Authors:
ROME UNIV (ITALY)
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| The lithium battery field has tremendously expanded since 1982 when the first edition of IMLB (IMLB-1) was held in Rome. The rapidly expanding commercialization of rechargeable lithium batteries in the consumer electronics market and the extension of their use for electric vehicle applications, has dramatically increased the academic and industrial interest in this exciting field. This can be seen in a continuously growing participation in ... |
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| Development of a High Capacity Lithium-Ion Battery for a Navy Aircraft |
2000 |
13 pages |
| Authors:
Brian J. Stein; John W. Baker; Pinakin M. Shah; Nathan D. Isaacs; Bill Johnson; NAVAL AIR WARFARE CENTER AIRCRAFT DIV PATUXENT RIVER MD
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| In response to the Navy's requirement for a lighter, higher capacity, secondary battery, Mine Safety Appliances (MSA) Company designed and built an experimental lithium-ion "drop-in" replacement battery for demonstration of its performance in the Pioneer aircraft. Lithium ion technology using a lithiated cobalt dioxide positive electrode, graphitized carbon negative electrode and liquid organic electrolyte has demonstrated a significant enhancement in performance over other rechargeable systems ... |
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| Photoreductions in Aqueous Semiconductor Suspensions and Properties of Modified Polyacrylonitrile Films |
14 DEC 1998 |
78 pages |
| Authors:
Robert L. Calhoun Jr; AUBURN UNIV AL
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| Particles of the semiconductor titanium dioxide have been shown to heterogeneously catalyze the destruction of chlorofluorocarbons (CFCs) in both air saturated and degassed aqueous suspensions. The photoreduction of CFC-11 or R-11 (CCl3F) in this manner was studied over a range of initial R-11 concentrations, and UV light intensities. Kinetic determinations of the reduction progress were performed via ion-selective electrodes. The reduction takes place via radical chain mechanism which is eventually ... |
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| Introducing Chemical Transport Selectivity into Gold Nanotubule Membranes |
01 JUL 1998 |
16 pages |
| Authors:
John C. Hulteen; Charles R. Martin; COLORADO STATE UNIV FORT COLLINS DEPT OF CHEMISTRY
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| We recently described polymeric membranes that contain a collection of monodisperse Au nanotubules with inside diameters of molecular dimensions (<1 nm). W showed that these membranes can be used to cleanly separate small molecules on the basis of molecular size. These membranes can also show charge- based transport selectivity which can be reversible switched between cation and anion-selective states. In addition to molecular size- and charge-based selectivity, chemical interactions (e.g., ... |
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| Thermal Neutron Detector |
31 MAR 1998 |
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| Authors:
Hugh D. Copeland; Jon R. Losee; Gary F. Mastny; DEPARTMENT OF THE NAVY WASHINGTON DC
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| A thermal neutron detector comprises an enclosure containing a helium-xenon gas mixture, an optical fiber, and an electrode arranged to detect ion particles. The optical fiber detects photons generated by a reaction of the gas mixture with neutrons passing through the enclosure. The reaction also generates ion particles that are detected by the electrode. A coincidence detector generates an output signal corresponding to the correlation of ion detections from the ... |
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| Metabolic Inhibition of a Toluene-Enriched Microbial Population Due to Lead (Pb2+); Verification of a Free Metal ION Toxicity Model |
DEC 97 |
109 pages |
| Authors:
Patrick J. Marbas; AIR FORCE INST OF TECH WRIGHT-PATTERSONAFB OH
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| A dissolved oxygen probe and an ion specific electrode were used to study the lead-induced metabolic inhibition in a toluene-enriched microbial population. Predicted toxicity values were compared to the actual toxicity responses using a free metal ion toxicity model (TM) which linked metabolic inhibition with lead activity. Experimentally derived values for the model parameters (lead activity and a lead distribution coefficient) were used in the TM. It was postulated that ... |
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| The Stability of Arc Attachment in Arcjet Propulsion Devices |
JAN 97 |
93 pages |
| Authors:
Mark A. Cappelli; Benjamin Yuan; STANFORD UNIV CA DEPT OF MECHANICAL ENGINEERING
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| The design of high current plasma devices such as arcjet thrusters, arc heaters, magnetohydrodynamic generators, and plasma opening switches has in the past been based mostly on empirical methods. In the case of arcjet thrusters, these methodologies have produced a steady, reliable device when operated at low power levels. However, it is desirable to increase the performance and operating range of the arcjet so that they may run more efficiently ... |
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| Development of an Ultra-Safe Rechargeable Lithium-Ion Battery |
AUG 95 |
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| Authors:
J. K. Jacobs; ELECTROFUEL MFG CO TORONTO (ONTARIO)
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| Development of an Ultra-Safe Rechargeable Lithium-Ion Battery |
JUL 95 |
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| Authors:
J. K. Jacobs; ELECTROFUEL MFG CO TORONTO (ONTARIO)
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| In Vivo Measurement of Na+ and K+ ions Using ion-Selective Electrodes |
05 JUN 95 |
28 pages |
| Authors:
Anthony I. Osagie; Candace B. Matthew; Stephen P. Mullen; ARMY RESEARCH INST OF ENVIRONMENTAL MEDICINE NATICK MA
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| Measurement of circulating levels of the electrolytes Na+ and K+ is integral to physiological studies of hyperthermia, dehydration, and nutrition. Current methods require removal of blood samples for later analysis. In small animals such as rats the volume removed can alter experimental results. In this study, cannulae were surgically implanted in a jugular vein and carotid artery of rats. Using ion selective electrodes and a flow-through sampling chamber of our ... |
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| Ion-Selective Reference Probe. |
30 MAY 1995 |
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| Authors:
Albert R. Zirino; DEPARTMENT OF THE NAVY WASHINGTON DC
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| An ion-selective reference probe which is adapted for use with potentiometric measurement systems is disclosed. The reference probe is non-chloride based and employs a-specially adapted electrolyte which is reversible (i.e. with regard to ionic activity). More particularly the electrolyte includes appropriate concentrations of ethylenediamine and copper(II) ions in a solvent to permit reversibility of the electrolyte within a desired range. Junction potential between the electrolyte and a test solution is ... |
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| Development of an Ultra-Safe Rechargeable Lithium-Ion Battery |
15 MAY 95 |
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| Authors:
J. K. Jacobs; ELECTROFUEL MFG CO TORONTO (ONTARIO)
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| Evaluation of Halon Alternatives in Inerting Experiments |
APR 95 |
33 pages |
| Authors:
Anthony E. Finnerty; Dawnn M. Saunders; ARMY RESEARCH LAB ABERDEEN PROVING GROUND MD
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| Inerting experiments were conducted in a 20-liter stainless steel chamber. Eight potential Halon 1301 replacement agents were used to inert butane-air mixtures. The agents were ranked on the amount required to completely inert the system and on their tendencies to form hydrogen fluoride. A specific ion electrode was used to determine the amount of hydrogen fluoride formed when less than the amount of agent required for complete inertion was used ... |
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| Development of an Ultra-Safe Rechargeable Lithium-Ion Battery |
95 |
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| Authors:
J. K. Jacobs; ELECTROFUEL MFG CO TORONTO (ONTARIO)
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| H(+)-ISFET Type Penicillinase Sensor |
05 NOV 91 |
15 pages |
| Authors:
Zhong Lichan; Li Gaoxiang; Wang Zhengxiao; Liu Luna; FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OH
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| We took an SOS type H + - ISFET and pentyl dialdehyde connective bovine blood serum protein penicillinase membrane set and synthesized a single transistor output type penicillinase-H+-ISFET sensor probe (below simply designated penicillinase FET). In conjunction with this, it was used to measure the amount of penicillin contained in solutions. Ion sensitive field effect transistors as well as the biologically sensitive field effect transistors which have been developed on ... |
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| Studies of Thin Film Chemical Sensors Using the Quartz Crystal Microbalance |
AUG 90 |
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| Authors:
Howard R. Meyer Jr; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH
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| The quartz crystal microbalance (QCM) is emerging as powerful new tool in sensor technology. In the course of this work, the QCM is used to study solvent and ion transport in poly(vinyl chloride) (PVC) ion-selective electrode (ISE) membranes and as a base for thin film analytical sensors for specific ionic species in solution. Thin (approximately 1.5 micrometer) PVC-based ISE membranes swell in solution due to solvent and/or ion uptake, the ... |
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| Investigation of the Interface between Two Immiscible Electrolytes Applied to Membrane Electrochemistry |
27 JUN 88 |
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| Authors:
Petr Vanysek; NORTHERN ILLINOIS UNIV DE KALB DEPT OF CHEMISTRY
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| The interface between two immiscible electrolytes is used as a simple model for a biological membrane. Electrochemistry of liquid-liquid interfaces allows us to gain an insight into the kinetics on membranes, adsorption processes, ion-selective electrodes and the structure of the interfacial double- layer. In this project, the following problems are especially investigated: The effects of biologically active materials on simple ion transfer kinetics, Potential sensitive fluorescence dyes in liquid/liquid electrochemistry, ... |
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| Electron Impact Phenomena in VUV Photoionization Mass Spectroscopy |
26 MAY 87 |
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| Authors:
Thomas C. Huth; M. B. Denton; ARIZONA UNIV TUCSON DEPT OF CHEMISTRY
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| Electron impact ionization arising from acceleration of stray electrons in the ion source is a major interference in photoionization mass spectrometry with vacuum ultraviolet sources. Results are presented which show that most of this ionization is caused by low energy secondaries generated when stray primaries are collected by the ion source electrodes. The primaries are produced mainly by interaction of scattered VUV radiation with metal surfaces. The low energy stray ... |
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| Metal Complexes for Defense against Cyanide Intoxication |
NOV 86 |
61 pages |
| Authors:
Yee W. Chan; Robert B. Wilson Jr; SRI INTERNATIONAL MENLO PARK CA
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| Metal complexes having high affinities for cyanide binding can be used as antidotes for cyanide intoxication. A number of water-soluble phthalocyanine complexes have been synthesized and tested for this purpose Compounds tested contain a variety of metal ions (Co(3+), Co(2+), Fe(2+), Ni(2+) , FE(3+), Cu(2+), Ru(3+), Pd(2+), Mn(4+), and V(4+) and functional groups (SO3(- ), NH3(+) and CO2(-). The rate of cyanide binding to these complexes was studied by spectroscopic ... |
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| The Neuronal Microenvironment. Annals of the New York Academy of Sciences. Volume 481 |
86 |
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| Authors:
Helen F. Cserr; NEW YORK ACADEMY OF SCIENCES NY
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| The microenvironment of a nerve cell is essential to its function and the characterization of this domain is a major issue in contemporary neurobiology. The behavior of neurons is strictly related to their physiological activity, which is itself dependent on the chemical composition of the encompassing environment. Beyond this crucial role, the interstitial space of the brain serves as a conduit for the transmission of information. The microenvironment does not ... |
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| Microstructures Built from Electroactive Polymers: Toward a Macromolecular Electronics |
SEP 85 |
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| Authors:
R. W. Murray; NORTH CAROLINA UNIV AT CHAPEL HILL DEPT OF CHEMISTRY
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| Electrodes can be coated with electrochemically reactive polymers in several microstructural formats called sandwich, array, bilayer, microelectrode, and ion gate electrodes. These microstructures can be used to study the transport of ions through in the polymers as a function of the polymer oxidation state, which is essential to understanding the conductivity properties of these new chemical materials. The microstructures also exhibit potentially useful electrical and optical responses, including current rectification, ... |
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| In-Situ Leach Measuring System. |
01 MAR 1983 |
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| Authors:
P. F. Seligman; J. W. Neumeister; DEPARTMENT OF THE NAVY WASHINGTON DC
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| A device and method for measuring the antifouling coating leach rates on ships' hulls uses a spherical segment shaped shell that circulates water over a coated area. A pump connected in closed circuit with the shell assures proper flow rate, A second pump creates a partial vacuum and holds the shell on the coated surface. A combination of nozzles and outlet fittings assures that the coating is exposed to a ... |
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| Miniaturized Multisensor Probes Based on Coated Wire Ion Selective Electrodes |
11 JAN 1983 |
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| Authors:
Henry Freiser; ARIZONA UNIV TUCSON DEPT OF CHEMISTRY
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| Research concerned with the development of selective, sensitive, and rugged methods of analysis for organic species in sea water and general oceanographic environments as well as those that are associated with CW agents, that would be capable of application in general field use has been carried out. A two-pronged attack involving (a) multi-sensor ion probes based on coated wire electrode technology and (b) a newly developed liquid chromatographic technique for ... |
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| Proceedings of the Symposium on Electrocatalysis. Proceedings Volume 82- 2 |
82 |
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| Authors:
W. E. O'Grady; P. N. Ross Jr.; F. G. Will; ELECTROCHEMICAL SOCIETY INC PENNINGTON NJ
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| This symposia discussed: Electrocatalysis: Fundamental Aspects and Recent Developments; Studies of Chemisorption on Heavy Transition Metal Surfaces; Oxygen Reduction with Carbon Supported Metallic Cluster Catalysts in Alkaline Electrolyte; Electrocatalysis on Ion Implanted Electrodes ; Chemical and Electrochemical Surface Reactivity. Role of the Competition between Solvent and Reaction Intermediate Adsorption; Changes of the Electrochemical Characteristics of Rhodium Electrodes Induced by Potentiodynamic Perturbation; The Growth and the Stabilization of the O-Containing Species ... |
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| A Pollution Abatement Concept: Evaluation of ECO-TEC Chromic Acid Recovery System |
16 SEP 1981 |
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| Authors:
H. J. Lee; S. O'Brien; H. M. Gundersen; NAVAL AIR DEVELOPMENT CENTER WARMINSTER PA AIRCRAFT AND CREW SYSTEMS TECHNOLOGY DIRECTORATE
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| The evaluation of a short bed rapid cycle ion exchange concept for pollution control at the source has been completed. An ECO-TEC short bed rapid cycle ion exchange unit Model C12, was installed in a chromium electroplating line. The unit is designed to remove chromic acid and particulate matter from the first rinse tank and return purified water to the second rinse. It should recover 99% of the chromic acid ... |
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| Kinetic Studies of Major Seawater Chemical Equilibria. |
30 JUN 1979 |
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| Authors:
Gordon Atkinson; OKLAHOMA UNIV NORMAN DEPT OF CHEMISTRY
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| This report contains reprints or preprints of the following papers: On Ion Selective Electrode Study of Calcium and Magnesium Sulfate in Aqueous Solution; Thermodynamics of Ion Association in Aqueous Copper Sulfate; Parts I and II; and Ultrasonic Absorption in Aqueous Alkali Metal Sulfate Solutions. |
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| Novel Microcomputer-Controlled Potentiometric Analysis System. |
05 JAN 1979 |
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| Authors:
Charles Martin; Henry Freiser; ARIZONA UNIV TUCSON DEPT OF CHEMISTRY
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| A novel microcomputer-controlled potentiometric analysis system is described. This system combines the low cost and ease of construction advantages of microcomputer-based instrumentation with the high level software capabilities of a minicomputer. This is made possible through the use of a powerful new computer language called CONVERS. The instrumentation and CONVERS software system are described. Applications of this system to endpoint determination in potentiometric titrations and fully automated generation of calibration ... |
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Reports by Keyword(s)
ION SELECTIVE ELECTRODES
