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.
Results
Showing 1 to 20 of 77 for “"chemometrics"”.
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Towards genetic algorithm methodology in chemometrics
Contains fulltext : mmubn000001_167753932.pdf (Publisher’s version ) (Open Access)
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Application of chemometrics in process analysis
The acid catalysed esterification of ethanol by acetic acid, a batch process, has been investigated on a laboratory scale at the high temperature range of 78 - 80°C. The data has been collected by Raman Spectroscopy and successfully de-noised using Principal Components Analysis. The first principal …
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Improved data processing for sustainable industry with chemometrics
Contains fulltext : 237165.pdf (Publisher’s version ) (Open Access)
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Matrix algorithms for bilinear estimation problems in chemometrics
Thesis: Ph. D., Massachusetts Institute of Technology, Department of Mechanical Engineering, 1985
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Application of trace analysis and chemometrics to environmental problems
The original aim of this investigation was to determine the factors affecting the treatability of coloured waters found in peaty areas. This involved the extraction of the humic acid thought to be causing the problem, followed by the analysis of the products of controlled degradation. It was found …
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Raman Chemometrics and Application to Enzyme Kinetics and Urinalysis
Raman spectroscopy records the inelastic scattering of photons originating from striking a sample with monochromatic light. Inelastic, or Raman, scattered photons shift in wavelength due to excitation of the vibrational modes of molecules struck by the incident light. The Raman scattered photons …
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Chemometrics and NMR spectroscopy for metabolomics analysis of neurological disorders
Contains fulltext : 94175.pdf (Publisher’s version ) (Open Access)
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Chemometrics applied to the discrimination of synthetic fibers by microspectrophotometry
Microspectrophotometry is a quick, accurate, and reproducible method to compare colored fibers for forensic purposes. The use of chemometric techniques applied to spectroscopic data can provide valuable discriminatory information especially when looking at a complex dataset. Differentiating a group …
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Development of a solid state IR analyser system using chemometrics
… conclusion, the project demonstrated the role chemometrics can play in the development of a solid state gas analyser, from experimental design to data treatment and analysis. It was proved the VS-MLR could be successfully utilised to determine suitable wavelengths to measure in the array for …
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INVESTIGATION OF CHEMOMETRICS METHODS FOR CHARACTERISING DRIFT PHENOMENA IN iCK-AES
The objective of this study was to fully characterise drift phenomena in inductively coupled plasma atomic emission spectroscopy (ICP-AES) in order to develop novel correction procedures to aid routine analysis. Long-term drift of the analytical signal continues to be a potential disadvantage when …
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The development and application of chemometrics to process analysis in an industrial environment
This thesis describes two main sections of work, an examination of a commercial product, Intrasite Gel, and the development of an algorithm for variable selection using projected latent structures.Following on from the successful development of a variable selection procedure for multivariate linear …
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Combining Chemometrics and non-target GC-IMS gas phase analysis for improved bioprocess monitoring
… tracing of specific compounds and combined with chemometrics as non-target “fingerprints” characteristic of more abstract variables, such as batch maturity. Some of the peaks detected showed oscillating concentration variations, not present in other PAT and not caused by the process control …
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Chemometrics applied to food industry: improving quality, safety and sustainability using multivariate data analysis
L'abstract è presente nell'allegato / the abstract is in the attachment
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Deciphering the chemistry of host-parasitic plants interactions using the UHPLC-q-TOF-MS and chemometrics
While mistletoes in the genus Viscum are extensively used in ethnomedicine globally, the parasitic nature of these plants can impact their secondary metabolite composition and thereby, influence their medicinal properties. The main objective of this study was to contrast the metabolome of Viscum …
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Forensic Discrimination, Age Estimation, and Spectral Optimization For Trace Detection of Blood On Textile Substrates Using Infrared Spectroscopy and Chemometrics
<p>The objective of this dissertation is to provide the scientific foundation for spectroscopic detection of biological fluids at crime scenes. Identifying these fluids using spectroscopy may replace existing presumptive chemical-based tests that have disadvantages (i.e., toxicity and sensitivity …
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Non-destructive analysis of popular cigarette brands utilizing attenuated total reflectance (ATR) and diffuse reflectance infrared fourier transform spectroscopy (DRIFTS) and chemometrics
… and transmission FTIR. When combined with chemometrics, a mathematical approach to finding similarities and differences among samples, infrared analysis can be used to distinguish between samples and classify unknowns. This research explores the possibility of utilizing various infrared …
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Facing the challenges of Industry 4.0: advanced techniques of near-infrared spectroscopy and chemometrics to drive innovation in materials science and food analysis
L'abstract è presente nell'allegato / the abstract is in the attachment
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The Development and Evaluation of Non-invasive Methods to Characterise the Disease States of Patients Utilising Selective Discrimination, Gas Chromatography-Mass Spectrometry and Chemometrics
… gas chromatography-mass spectrometry (GC-MS) and chemometrics. The primary analytical technique investigated was GC-Time-of-Flight-MS coupled with headspace solid-phase microextraction (HS-SPME-GC-ToFMS). A robust and sensitive method was developed by optimisation of all sample analysis parameters …
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Fast Identification of Components Commonly Used in Homemade Explosives by Spectroscopic and Chemometric Methods
… of spectroscopic techniques with the strength of chemometrics such as principal component analysis (PCA) and partial least squares discriminant analysis (PLS-DA) for qualitative discrimination and classification of common fuel sources and inorganic salts used as oxidants. Additional quantification …
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