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 15 of 15 for “"breath analysis"”.
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Exhaled breath analysis using laser absorption spectroscopy
… developing field, with many applications in breath diagnostics and therapeutic monitoring. For this thesis, laser spectroscopic techniques were employed to measure exhaled nitric oxide (NO), carbonyl sulfide (OCS) and carbon dioxide (CO2). A pulsed quantum cascade laser operating at 4.86 …
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Applications of Soft Chemical Ionization Mass Spectrometry: Taking the next steps along the journey of breath analysis
Contains fulltext : 289476.pdf (Publisher’s version ) (Open Access)
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Characterization of human expired breath by solid phase microextraction and analysis using gas chromatography-mass spectrometry and differential mobility spectrometry
Breath analysis has potential to become a new medical diagnostic modality. In this thesis, a method for the analysis of human expired breath was developed using gas chromatography-mass spectroscopy. It was subsequently adopted for gas chromatography-differential mobility spectroscopy, a modality …
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Development of a sampling system for the collection of exhaled breath condensates and its subsequent analysis using 2-dimensional gas chromatography
Exhaled human breath contains thousands of compounds that provide information about the physiological state of the human body, yet it is not used as extensively as blood or urine samples for medical diagnostics. Some of the major reasons for this include the lack of a standard method of sample …
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Aminoxyl Catalyzed Electrochemical Ethanol Detection: Development of a New Breathalyzer Using Molecular Catalysis
… its volatility, ethanol vapor can be detected in breath, and its vapor concentration is proportional to BAC. While portable breathalyzers have been designed for simple breath alcohol concentration detection, they are limited by high cost or the need for frequent recalibration. The first chapter of …
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Chip-Scale Gas Chromatography
… is the leading analytical instrument for the analysis of volatile organic compounds (VOCs). Due to its wide-ranging applications, it has received great attention both from industrial sectors and scientific communities. Recently, numerous research efforts have benefited from the advancements in …
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Chemical Micro Preconcentrators Development for Micro Gas Chromatography Systems
… is to develop micro instruments for chemical analysis. An example is gas chromatography (GC) which is widely used in food, environmental, pharmaceutical, petroleum/refining, forensic/security, and flavors and fragrances industries. A MEMS-based micro GC (µGC) provides capabilities for …
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Graphene Inkjet Integrated Intelligent Sensors and Systems
… has emerged as a key driver in point-of-care breath analysis for early diagnosis. This also demands real-time monitoring of air pollution based on internet of things (IoT) networks. Both systems rely on the development of scalable mobile-embeddable devices. Conventional devices face challenges …
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Printable and Machine Intelligent 0D/2D Materials Gas Sensor Arrays
… Internet of Things, wearable electronics, and breath analysis.
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Adult pedestrian traffic trauma in Cape Town with special reference to the role of alcohol
… viz. self-evaluation, clinical assessment, breath alcohol analysis and blood alcohol concentration (SAC). Data were analysed using SAS version 6. The study recorded a very high incidence of alcohol intoxication among injured pedestrians in Cape Town. This is highly suggestive of a causal …
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Portable spectroscopy system for ultra-sensitive, real-time measurement of breath ethane
… for ultra-sensitive, real-time detection of breath ethane. In healthcare, breath ethane is a widely accepted marker of free radical-induced cell damage and may be used to indicate changes in oxidative stress. The aim was to deliver a compact instrument capable of long-term, on-site use in a …
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Využití chemirezistorů pro zlepšené snímání látek při analýze dechu
Diplomová práce se zabývá otázkou analýzy dechu s využitím chemirezistorů jako detekčních prvků pro analýzu vydechovaného vzduchu. Důraz je kladen na aplikaci fluktuačně zlepšeného snímání u chemirezistorů pro analýzu dechu, konstrukční řešení použitelného měřícího systému, a jeho kalibraci. Oproti …
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Biomarkers of Lipid Oxidation in the Oral Cavity
… with oxidation of lipids in the oral cavity. Breath, an emerging medium for analysis of internal condition, is one means of measuring the metal-induced lipid oxidation responsible for this flavor. This project analyzes the breath of human subjects, as well as lipid oxidation of in vitro …
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Detection of hydrogen peroxide and ethanol in exhaled breath using biosensors: Considerations in standardizing breath collection
Breath monitoring is a non-invasive, safe, and repeatable approach to determining the health status of humans and other mammals. Breath samples could be detected in two ways directly sensing exhaled breath (EB) or chilling the EB to obtaining the exhaled breath condensate (EBC). Each has its …