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 47 for “"NIR spectroscopy"”.
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Geographic classification of wines using Vis-NIR spectroscopy
… expensive procedures. Visible and near infrared spectroscopy (Vis-NIR) is recognized as a rapid and non-destructive technique. In recent years, several studies have been conducted using Vis-NIR spectroscopy to analyze wine for both quantitative and qualitative purposes. The aim of this research …
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Near-Infrared (NIR) Spectroscopy-based Pharmaceutical Process Analytical Technology (PAT) Systems: Risk and Performance
… of final drug products.</p> <p>Near-Infrared (NIR) spectroscopy is a commonly used analytical part of the PAT toolbox. It offers advantages such as rapid/non-destructive analysis, limited sample preparation, and specificity to physical/chemical quality attributes. The implementation of …
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Development of NIR Spectroscopy and Microspectroscopy Analysis of Soybean Seeds for Composition Improvements and Food Applications
*This dissertation is a compound document (contains both a paper copy and a CD as part of the dissertation). The CD requires the following system requirements: Microsoft Office.
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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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Vibrational spectroscopic techniques (Raman, FT-IR and FT-NIR spectroscopy) as a means for the solid-state structural analysis of pharmaceuticals
… spectroscopic techniques (Raman, FT-IR and FT-NIR spectroscopy) as a means for the solid-state structural analysis of pharmaceuticals. Budesonide, fluticasone propionate, salbutamol hemisulfate, terbutaline hemisulfate, ipratropium bromide, polymorphic forms of salmeterol xinafoate and two …
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Investigation of a solvent-free continuous process to produce pharmaceutical co-crystals. Understanding and developing solvent-free continuous cocrystallisation (SFCC) through study of co-crystal formation under the application of heat, model shear and twin screw extrusion, including development of a near infrared spectroscopy partial least squares quantification method
… was paid to the development of near infrared (NIR) spectroscopy as a process analytical technology (PAT). Twin screw, hot melt extrusion was the base technique of the SFCC process. Changing parameters such as temperature, screw speed and screw geometry was important for improving the co-crystal …
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Magnetite Oxidation in Aqueous Systems
… products, maghemite, by the use of UV-Vis-NIR spectroscopy. As oxidation proceeded at a constant specific temperature, the concentration of magnetite decreases, which was indicated by a decrease in absorption in the NIR-region of the spectrum. As magnetite concentrations decreased, the …
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Developing a spectroscopy-based high throughput assay for anthocyanin content in corn
… and often requires destroying the sample. Spectroscopy-based assays are simple, fast, and nondestructive analytical tools that may be used in determining TAC in fruits and cereal grains, and near infrared (NIR) spectroscopy is widely used in analyzing the chemical composition of raw …
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Non-Contact Sensing for Protected Cropping
… (mmWave) radar and near-infrared (NIR) spectroscopy, this work provides practical, scalable solutions for sustainable agricultural practices. The research is structured around three key contributions. First, Leafeon, a novel system using mmWave radar, is introduced for accurate and …
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Spatially resolved light propagation in tissue-like media
… in vivo using spatially resolved nearinfrared (NIR) spectroscopy. Alzheimer's disease is one of the most common forms of senile dementia occurring in the elderly population, and at present has no cure. The first step in developing a monitoring instrument involves differentiating the optical …
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Predictive model and near infrared spectroscopy in predicting the diesel fuel properties
… performance of vehicle engines. Near-infrared (NIR) technology has been investigated as an alternative to monitor the diesel fuel properties. NIR spectroscopy shows an enormous potential for quantitative analysis of complex samples by coupling with artificial neural networks (ANNs). Although a …
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Synthesis, Characterization, and Mixed-Valence Studies of Conformationally Constrained Bisferrocenyl Complexes for the Study of Through-Space S***π; Interactions
… were studied by ultra-violet photoelectron spectroscopy (UPS), cyclic voltammetry, differential pulse voltammetry, UV-Vis-NIR spectroscopy and DFT computations. Electrochemical results show two, fully reversible 1e⁻ redox processes for the ferrocenes where the separation of peaks is affected …
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Compositional analysis and classification of Miscanthus using Fourier transform near infrared spectroscopy
… based on Fourier transform near infrared (FT-NIR) spectroscopy, partial least squares regression (PLSR), and linear discriminant analyses (LDA) to provide quantitative and qualitative measures of Miscanthus composition were developed. Results showed large variations (mean ± S.D.) in glucan …
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Desenvolvimento de antisséptico bucal em pastilha para prevenção da cárie dental
… and mid-infrared (FTIR) and near-infrared(FT-NIR) spectroscopy. The pharmacotechnical characteristics of the mixture of thecomponents in powder form and the physicochemical and organoleptic characteristicsofthe tablets obtained by direct compression were also evaluated. …
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Synthesis, characterisation and applications of bimetallic nanoparticles
… Powerful experimental techniques viz. UV-Vis NIR spectroscopy and electron microscopy (STEM) were employed to characterise the monometallic and bimetallic AuNRs. AuNSs, AuNRs, Au@Pd NRs, Au@Pd NSs, Au@Pt NRs and Au@Rh core-shell nanorods were synthesised and characterised by one or both of the …
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Applications of ultrasound in pharmaceutical processing and analytics.
… (PAT tools) such as in-line rheology and in-line NIR spectroscopy. In-line rheological measurements were used to understand melt flow behaviour of theophylline / Kollidon VA 64 system in the slit die attached to the hot melt extruder. In-line NIR spectroscopic measurements were carried out for …
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INDUSTRY 4.0 IN THE AGRI-FOOD SECTOR: INNOVATIVE SENSORS AND SMART LOGISTICS TO SUPPORT THE SUSTAINABILITY OF THE SUPPLY CHAIN
… friendly methods. Visible and Near-Infrared (vis/NIR) spectroscopy and imaging techniques are highly regarded for their non-destructive sampling, real- time results, and ability to perform quality controls throughout the production process. However, these techniques typically involve expensive, …
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Implementing process analytical technology (PAT) tools for the analysis and control of manufacturing processes during hot-melt extrusion
… scanning calorimetry (DSC), near infrared (NIR) spectroscopy, variable temperature x-ray powder diffraction (VTXRPD) and dissolution studies were implemented in various drug delivery systems manufactured by HME. Paracetamol (PMOL) was processed with ethyl cellulose (EC) - Compritol 888 ATO …
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Effects of dietary feed additives on the performance and gastrointestinal health of broilers exposed with coccidial spores and varying litter conditions
… builds a tool to allow the use of Near-Infrared (NIR) spectroscopy for real-time litter moisture monitoring. To achieve this, 1,455 litter samples across five trials were modeled for NIR spectrum and litter dry matter. Calibration models exhibited high predictive accuracy, characterized by …
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NIR hyperspectral imaging for animal feed ingredient applications
… industry, near-infrared hyperspectral imaging (NIR HSI) was explored for animal feed applications. Its ability to provide chemical composition of the sample at the pixel level provides an advantage over the typical NIR spectroscopy. In this dissertation, a literature review was presented that …
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