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Brno University of Technology

1. Eliáš, Jan. Identifikace změny textury povrchu vybraných materiálů metodou akustické emise: Identification of changes in surface texture of the selected materials by the method of acoustic emission.

Degree: 2019, Brno University of Technology

This Bachelor thesis deals with monitoring changes in surface roughness of moving metal objects rubbing each other on selected parameters of acoustic emissions. Parameters of the AE signal during the movement of bronze and cast iron bodies on the surface of a fixed steel rod were measured, recorded and analyzed. These results can serve for further research on assessment possibilites of the degree of wear of a surface using the AE method. Measuring was performed using a measuring product intended for AE and the Dakel sensors and measuring software. Advisors/Committee Members: Mazal, Pavel (advisor), Bumbálek, Bohumil (referee).

Subjects/Keywords: akustická emise; drsnost povrchu; RMS signál; emitování AE; analýza; acoustic emission; surface roughness; RMS signal; emit AE; analysis

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

Eliáš, J. (2019). Identifikace změny textury povrchu vybraných materiálů metodou akustické emise: Identification of changes in surface texture of the selected materials by the method of acoustic emission. (Thesis). Brno University of Technology. Retrieved from http://hdl.handle.net/11012/31939

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16th Edition):

Eliáš, Jan. “Identifikace změny textury povrchu vybraných materiálů metodou akustické emise: Identification of changes in surface texture of the selected materials by the method of acoustic emission.” 2019. Thesis, Brno University of Technology. Accessed August 08, 2020. http://hdl.handle.net/11012/31939.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7th Edition):

Eliáš, Jan. “Identifikace změny textury povrchu vybraných materiálů metodou akustické emise: Identification of changes in surface texture of the selected materials by the method of acoustic emission.” 2019. Web. 08 Aug 2020.

Vancouver:

Eliáš J. Identifikace změny textury povrchu vybraných materiálů metodou akustické emise: Identification of changes in surface texture of the selected materials by the method of acoustic emission. [Internet] [Thesis]. Brno University of Technology; 2019. [cited 2020 Aug 08]. Available from: http://hdl.handle.net/11012/31939.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Eliáš J. Identifikace změny textury povrchu vybraných materiálů metodou akustické emise: Identification of changes in surface texture of the selected materials by the method of acoustic emission. [Thesis]. Brno University of Technology; 2019. Available from: http://hdl.handle.net/11012/31939

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

2. Swortwood, Madeleine Jean. Comprehensive Forensic Toxicological Analysis of Designer Drugs.

Degree: PhD, Chemistry, 2013, Florida International University

New designer drugs are constantly emerging onto the illicit drug market and it is often difficult to validate and maintain comprehensive analytical methods for accurate detection of these compounds. Generally, toxicology laboratories utilize a screening method, such as immunoassay, for the presumptive identification of drugs of abuse. When a positive result occurs, confirmatory methods, such as gas chromatography (GC) or liquid chromatography (LC) coupled with mass spectrometry (MS), are required for more sensitive and specific analyses. In recent years, the need to study the activities of these compounds in screening assays as well as to develop confirmatory techniques to detect them in biological specimens has been recognized. Severe intoxications and fatalities have been encountered with emerging designer drugs, presenting analytical challenges for detection and identification of such novel compounds. The first major task of this research was to evaluate the performance of commercially available immunoassays to determine if designer drugs were cross-reactive. The second major task was to develop and validate a confirmatory method, using LC-MS, to identify and quantify these designer drugs in biological specimens. Cross-reactivity towards the cathinone derivatives was found to be minimal. Several other phenethylamines demonstrated cross-reactivity at low concentrations, but results were consistent with those published by the assay manufacturer or as reported in the literature. Current immunoassay-based screening methods may not be ideal for presumptively identifying most designer drugs, including the “bath salts.” For this reason, an LC-MS based confirmatory method was developed for 32 compounds, including eight cathinone derivatives, with limits of quantification in the range of 1-10 ng/mL. The method was fully validated for selectivity, matrix effects, stability, recovery, precision, and accuracy. In order to compare the screening and confirmatory techniques, several human specimens were analyzed to demonstrate the importance of using a specific analytical method, such as LC-MS, to detect designer drugs in serum as immunoassays lack cross-reactivity with the novel compounds. Overall, minimal cross-reactivity was observed, highlighting the conclusion that these presumptive screens cannot detect many of the designer drugs and that a confirmatory technique, such as the LC-MS, is required for the comprehensive forensic toxicological analysis of designer drugs. Advisors/Committee Members: Anthony DeCaprio, Piero Gardinali, W. Lee Hearn, Jaroslava Mikšovská, Georg Petroianu.

Subjects/Keywords: designer drugs; toxicology; LC-MS; ELISA; EMIT; cross-reactivity; cathinone derivatives; forensic toxicology; bath salts; Analytical Chemistry; Toxicology

…13 2.3.1.2 EMIT… …40 3.4.2.2 EMIT… …14 Figure 3: Diagram of an EMIT system (65)… …concentration EI Electron impact ionization ELISA Enzyme-linked immunosorbent assay EMIT Enzyme… …immunoassays (e.g., EMIT), different matrices (i.e., meconium, whole blood, oral fluid… 

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

Swortwood, M. J. (2013). Comprehensive Forensic Toxicological Analysis of Designer Drugs. (Doctoral Dissertation). Florida International University. Retrieved from https://digitalcommons.fiu.edu/etd/997 ; 10.25148/etd.FI13120611 ; FI13120611

Chicago Manual of Style (16th Edition):

Swortwood, Madeleine Jean. “Comprehensive Forensic Toxicological Analysis of Designer Drugs.” 2013. Doctoral Dissertation, Florida International University. Accessed August 08, 2020. https://digitalcommons.fiu.edu/etd/997 ; 10.25148/etd.FI13120611 ; FI13120611.

MLA Handbook (7th Edition):

Swortwood, Madeleine Jean. “Comprehensive Forensic Toxicological Analysis of Designer Drugs.” 2013. Web. 08 Aug 2020.

Vancouver:

Swortwood MJ. Comprehensive Forensic Toxicological Analysis of Designer Drugs. [Internet] [Doctoral dissertation]. Florida International University; 2013. [cited 2020 Aug 08]. Available from: https://digitalcommons.fiu.edu/etd/997 ; 10.25148/etd.FI13120611 ; FI13120611.

Council of Science Editors:

Swortwood MJ. Comprehensive Forensic Toxicological Analysis of Designer Drugs. [Doctoral Dissertation]. Florida International University; 2013. Available from: https://digitalcommons.fiu.edu/etd/997 ; 10.25148/etd.FI13120611 ; FI13120611

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