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 20 of 81 for “"Chemometric"”.
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Raman Chemometric Method for Fuel Property Prediction
… This thesis develops and validates Raman-based chemometric methods that enable rapid, portable estimation of these properties and demonstrates their feasibility in online and engine-integrated settings. A curated database of 168 liquid-phase samples was assembled that spans the functional-group …
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Chemometric studies of cloudwater and wet depositions
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Nuclear Engineering, 1995.
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Applications and developments of chemometric methods for process analytical chemistry
Traditional process monitoring methods of off-line analysis involve removing a sample from the process and taking it to a centralised analytical laboratory. It takes time for the analytical result to be achieved and the result is used retrospectively to determine the yield or quality of a batch, …
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Improving vacuum ultraviolet spectroscopy using instrumental modifications and chemometric applications.
… the analysis of VUV spectroscopy data with novel chemometric methods. Chapter two details the combination of VUV spectroscopy with cryogenic preconcentration. With cryogenic preconcentration, gases can be trapped over an extended period of time and then released quickly. Combination with cryogenic …
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Innovations in detecting food fraud using mass spectrometric platforms and chemometric modelling
… mass spectrometry (AMS) techniques, coupled with chemometric modelling could play a prominent role in the detection of food fraud.<br/>Firstly, a two-tier approach of Fourier-Transform infrared (FT-IR) spectroscopy and liquid chromatography-high resolution mass spectrometry (LC-HRMS) were used to …
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Chemometric methods for the analysis of process spectra using minimal reference data
To construct a spectroscopic multivariate calibration model, a set of representative mixture spectra (independent variables) and the corresponding reference values for the property of interest (dependent variables) must be obtained. For a dynamic system such as a batch or semi-batch chemical …
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Chemometric Analysis of Multivariate Liquid Chromatography Data: Applications in Pharmacokinetics, Metabolomics, and Toxicology
In the first part of this work, LC-MS data were used to calculate the in-vitro intrinsic clearances (CLint) for the metabolism of p-methoxyrnethamphetamine (PMMA) and fluoxetine by the CYP2D6 enzyme using a steady-state (SS) approach and a new general enzyme (GE) screening method. For PMMA, the SS …
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Application of chemometric analysis to UV-visible and diffuse near-infrared reflectance spectra.
… computer-assisted data acquisition systems, and chemometric modeling software. Chemometric regression modeling as well as classification studies were conducted on spectral data obtained with chili peppers and fabrics samples. Multivariate regression models known as partial least squares (PLS-1) …
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Forensic Application of Chemometric Analysis to Visible Absorption Spectra Collected from Dyed Textile Fibers
… fibers via microspectrophotometry (MSP). Several chemometric techniques were applied to spectral data and utilized to help discriminate fibers beyond the point where traditional methods of microscopical examination may fail. Because a dye's chemical structure dictates the shape of the absorption …
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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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Instrumental and Chemometric Analysis of Automotive Clear Coat Paints by Micro Laser Raman and UV Microspectrophotometry
… some past research has been done using MSP. Chemometric methods are also not typically used for this characterization. In this study, Raman and MSP spectra were collected from the clear coats of 245 American and Australian automobiles. Chemometric analysis was subsequently performed on the …
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Development of a Pharmaceutical Tablet Authentication system using Spectroscopic Techniques in combination with Multivariate Chemometric Methods
… method development is required with the help of chemometrics. The chemometric tools to be used should declare the test sample as either target class (authentic samples) or non-target class (alternate class or falsified samples). One challenge of method development is the sensitivity of …
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Economic and chemometric studies to supplement food-grade soybean variety development in the Mid-Atlantic region
Sustainability of the soybean industry relies on the growth of new industries and the continued improvement of seeds for utilization. Grower adoption and growth of the edamame industry has been slow in part due to insufficient information on its potential profitability and marketability. As such, …
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Influence of evaporation and matrix interferences on the association and discrimination of ignitable liquids using chemometric procedures
Thesis (M.S.)--Michigan State University. Department of Criminal Justice, 2010
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Chemometric-based compliance approach for detection of economically motivated fraud in multiple organic spices using NIR spectroscopy
Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2026-12-01
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