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.
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Showing 1 to 14 of 14 for “"Hair Analysis"”.
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Hair analysis for drugs of abuse
This thesis covers a range of important issues in hair analysis and includes 27 scientific works in which the name of the candidate was either listed as the first author or as the major contributor. The work presented in this thesis involved the development of a series of analytical methods to …
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Diagnostic use of hair analysis for the detection of misuse of amfetamines and cannabinoids
… to develop a single method to analyse drugs in hair and to apply this to case samples received from The Security Forces Hospital, Saudi Arabia. First of all, mass fragments and retention times for amfetamines and cannabinoids were identified by GC-MS using derivatization agents, PFPA/ethyl …
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Development of a method for the screening and quantification of methamphetamine, and its major metabolite amphetamine, in hair using liquid chromatography-tandem mass spectrometry
Hair has, over recent years, become widely recognised as an alternate or complementary matrix to blood and urine for drug analysis. Hair analysis offers a wider detection window after drug exposure than blood or urine testing and can provide a long-term history of an individual’s drug use. There …
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Determination of biomarkers for toxicity and antiretroviral adherence in hair in South African patients
… metabolite of alcohol, is a stable biomarker in hair that can be used to detect and monitor alcohol consumption over long time periods. Drugs of abuse are also detected in hair. Hair provides a longer window of drug detection compared to blood and urine. Recently, hair has also been studied as an …
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A comparison of calcium levels in pre-eclamptic and normotensive pregnancies in a low dietary calcium setting
… unreliable indicator of chronic calcium status, hair analysis is an accurate and well documented method of determining long-term micronutrient status.
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A prospective study of prenatal cocaine exposure: language, play, and global cognitive abilities in 2-year olds
… after delivery and later verified by maternal hair analysis. Productive child language was obtained from caregiver report and videotaped, caregiver-child interaction. Quality of play behaviors were coded from videotaped, child-alone play. Global cognitive skills were assessed with the Bayley. …
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An anthropological investigation into the facial preservation of ceremonial tsantsa and commercial shrunken heads
… structures using: manual inspection, microscopic hair analysis, visible spectrum light photography, ultraviolet fluorescence (UVF), infrared reflectography<br/>(IRR), morphometrics and MDCT scans.<br/>4) Generate average shrinkage patterns in relation to the preservation of facial features to …
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Applications of Hair as a Record of Systemic Exposure to Cortisol
Hair cortisol content (HCC) is a novel biomarker that uniquely captures retrospective systemic cortisol exposure. This thesis aimed to assess how different hair growth rates effect HCC timelines in Cushing’s and Addison’s patients, investigate the relationship between HCC and age, puberty, sex and …
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Biomonitoraggio umano: effetti sub-clinici da Piombo e Cadmio sull’accrescimento
… exposure to Pb and Cd in Sardinian children by hair analysis; 2) to detect any possible sub-clinical impact on growth due to exposure to these heavy metals; 3) to evaluate the individual susceptibility to absorption by using genetic polymorphisms involved in Pb and Cd metabolisms,. Methods: The …
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Alcohol markers in hair: New detection techniques and evidence interpretation
… spectrum disorder. When one alcohol marker in hair is analysed to indicate chronic use false negatives and false positives can occur. When two (ethyl glucuronide (EtG) and fatty acid ethyl esters (FAEEs)) are analysed false negatives and false positives can be recognized and provide stronger …
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Langzeitnachweis anaboler Steroidhormone
Die missbräuchliche Anwendung von anabolen Substanzen erfolgt mit dem Ziel eines verstärkten Muskelaufbaus - im Sport zur Leistungsverbesserung, in der Tierzucht zum Erreichen von Zuchtidealen oder bei der Masttierhaltung zur Produktivitätssteigerung. Bisher wurden Doping- oder …
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Determination of trace elements in hair for monitoring environmental and occupational exposure
Hair has a number of advantages over more conventional sample types, such as serum, whole blood and urine, as an indicator of the intake and exposure to trace elements. While the analysis of these conventional sample types can only be used as a measure of recent exposure, hair, in contrast, can …
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Evaluating the impact of ultraviolet light on chemical and mechanical properties of human scalp hair through controlled and natural experiments
Introduction: Human hair fibres have been studied in a variety of fields for different applications. Examples include the use of hair as a medical testing substrate for diagnosis of pathologies, as a tool for forensic investigations, a substrate for cosmetic product development and as a precursor …