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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
11

The role of the thermal contact conductance in the interpretation of laser flash data in fiber-reinforced composites /

Depalma, Carlos Mariano A., January 1993 (has links)
Thesis (M.S.)--Virginia Polytechnic Institute and State University, 1993. / Vita. Abstract. Includes bibliographical references (leaves 73-75). Also available via the Internet.
12

Determination of cyanide in sediments by flow injection analysis with amperometric detection.

January 1999 (has links)
by Kwan Hok-wing. / Thesis (M.Phil.)--Chinese University of Hong Kong, 1999. / Includes bibliographical references (leaves 67-69). / Abstracts in English and Chinese. / Acknowledgment --- p.i / Abstract --- p.ii / Chapter 1. --- INTRODUCTION / Chapter 1.1 --- Chemical speciation of cyanide --- p.1 / Chapter 1.2 --- Review of analytical techniques for cyanide determination --- p.3 / Chapter 1.3 --- Importance of sediment in the environment --- p.6 / Chapter 1.4 --- Characteristics of marine sediment --- p.6 / Chapter 1.5 --- Antropogenic sources of cyanide --- p.7 / Chapter 1.6 --- Research objective --- p.8 / Chapter 1.7 --- Brief description of the project --- p.9 / Chapter 2. --- INSTRUMENTATION AND THEORY / Chapter 2.1 --- Instrumentation for flow injection analysis system --- p.11 / Chapter 2.2 --- Basic principles of flow injection analysis --- p.21 / Chapter 2.3 --- Basic principles of amperometric detection --- p.24 / Chapter 3. --- EXPERIMENTAL / Chapter 3.1 --- Instrumentation --- p.25 / Chapter 3.2 --- Reagents --- p.32 / Chapter 3.3 --- Sample preparation --- p.34 / Chapter 4. --- RESULTS AND DISCUSSION / Chapter 4.1 --- Effect of bismuth on on-line precipitation of sulphide in FIA --- p.37 / Chapter 4.2 --- Calibration --- p.37 / Chapter 4.3 --- Effectiveness of the distillation conditions --- p.41 / Chapter 4.4 --- Comparisons of cyanide extraction methods for sediment analysis --- p.42 / Chapter 4.5 --- Effect of bismuth nitrate on cyanide recoveries --- p.45 / Chapter 4.6 --- Effect of bismuth nitrate on cyanide recoveries in the presence of sulphide --- p.48 / Chapter 4.7 --- Effect of bismuth nitrate on recoveries of total cyanide in the analysis of interlaboratory test samples --- p.55 / Chapter 4.8 --- Recoveries of complexed cyanide in the analysis of SETOC sample with sulphide interference --- p.57 / Chapter 4.9 --- Analysis of marine sediment samples --- p.58 / Chapter 4.10 --- Recovery tests and precision studies --- p.59 / Chapter 4.11 --- Interferences --- p.62 / Chapter 5. --- CONCLUSION --- p.66 / Chapter 6. --- REFERENCES --- p.67
13

Amperometric biosensors utilizing carbon nanotubes and metal deposits on glassy carbon electrode with poly(phenylenediamine) coatings

Dai, Yiqing 01 January 2004 (has links)
No description available.
14

In situ measurements of redox chemical species with amperometric techniques to investigate the dynamics of biogeochemical processes in aquatic systems

Neuhuber, Stephanie Maria Ulrike 05 1900 (has links)
No description available.
15

Amperometric detection of aldosterone by high-performance liquid chromatography with copper(II) bis-phenanthroline /

Bose, Rakesh. January 1995 (has links)
Thesis (M.S.)--Youngstown State University, 1995. / Includes bibliographical references (leaves 69-71).
16

Determination of organic compounds by high-performance liquid chromatography with conductometric detection.

January 1993 (has links)
by Chuen-shing Mok. / Thesis (Ph.D.)--Chinese University of Hong Kong, 1993. / Includes bibliographical references (leaves 192-193). / Chapter Chapter 1 --- INTRODUCTION --- p.1 / Chapter Chapter 2 --- INSTRUMENTATION AND THEORY --- p.9 / Chapter Chapter 3 --- INDIRECT CONDUCTOMETRIC DETECTION OF AMINO ACIDS AFTER HIGH-PERFORMANCE LIQUID CHROMATOGRAPHIC SEPARATION --- p.17 / Chapter Chapter 4 --- DETERMINATION OF MONOSODIUM GLUTAMATE IN FOODS WITH HIGH-PERFORMANCE LIQUID CHROMATOGRAPHY USING INDIRECT CONDUCTOMETRIC DETECTION --- p.52 / Chapter Chapter 5 --- HIGH-PERFORMANCE LIQUID CHROMATOGRAPHIC DETERMINATION OF ACTIVE INGREDIENTS IN COUGH-COLD SYRUPS WITH INDIRECT CONDUCTOMETRIC DETECTION --- p.83 / Chapter Chapter 6 --- HIGH-PERFORMANCE LIQUID CHROMATOGRAPHIC DETERMINATION OF ATROPINE AND ATROPINE- LIKE ALKALOIDS IN PHARMACEUTICAL PREPARATIONS WITH INDIRECT CONDUCTOMETRIC DETECTION --- p.144 / Chapter Chapter 7 --- CONCLUSION --- p.194
17

Enantioselective sensors and biosensors for clinical analysis

Nejem, R'afat Mahmoud. January 2004 (has links)
Thesis (Ph.D.)(Chemistry)--University of Pretoria, 2004. / Title from opening screen (viewed March 18th, 2005). Includes summaries in English and Afrikaans. Includes bibliographical references.
18

Amperometric biosensors based on carbon nanotubes with different polymer coatings

Wang, Wenju 01 January 2011 (has links)
No description available.
19

Measurements of the solubilities of some silver halides in water by electrical methods

Malan, George McPherson January 1955 (has links)
[Introduction, p. 3] The solubilities of the silver halides cannot be determined by the conventional methods of analytical chemistry because they are too sparingly soluble (of the order 1 x 10⁻⁵ to 1 x 10⁻⁶ g . equiv./1. at 25°C.) However, electrical, and to a lesser extent optical methods, are admirably suited because of their greater sensitivity. The conductometric and potentiometric methods are the two most important electrical techniques for the measurement of the solubilities of sparingly soluble salts, and are the ones employed in this research. There are large discrepancies between the published values for the solubility of silver chloride. Results obtained by the conductometric and potentiometric methods disagree. In addition, figures quoted by independent authors using the same method differ by as much as 15%.
20

The role of the thermal contact conductance in the interpretation of laser flash data in fiber-reinforced composites

Depalma, Carlos Mariano A. 06 October 2009 (has links)
The flash method proposed by Parker et al. in the early sixties is one of the most important experimental procedures to determine the thermal properties of homogeneous materials. Because of the versatility of this method, researchers have attempted to extend its usefulness into the realm of composite material. However, some difficulties arise because of the existence of preferential heat paths in heterogeneous materials, especially in fiber-reinforced composites. In order for experimental flash method results to be meaningful a homogeneous temperature front must exist at the back face of the sample, where the measurements are made. In this work, the parameters that render the radial temperature response of a fiber reinforced composite homogeneous at the back face were investigated. According to the literature three criteria must be met for homogeneity to occur: fiber-to-matrix volume ratio must be high; sample axial dimension must be large compared to radial fiber dimension and the thermal contact between the fibers and the matrix must be high. Since the first two criteria are met by most fiber-reinforced composite samples subject to the flash method, attention was concentrated on the third criterion. An inequality that must be met by the contact conductance term to establish homogeneity is proposed and some sample temperature profiles are presented. / Master of Science

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