Spelling suggestions: "subject:"nearinfrared dpectroscopy"" "subject:"nearinfrared espectroscopy""
1 |
Chemometric methods for the analysis of pharmaceutical dataHardy, Allison Jane January 1995 (has links)
No description available.
|
2 |
Analysis of synthetic polymers by near-infrared spectroscopy /Miller, Charles Edward, January 1989 (has links)
Thesis (Ph. D.)--University of Washington, 1989. / Vita. Includes bibliographical references (leaves [275]-286).
|
3 |
Moisture depth profiling in paper using near-infrared spectroscopy /Paaso, Janne. January 1900 (has links) (PDF)
Thesis (doctoral)--University of Oulu, 2007. / Includes bibliographical references (p. 182-193). Also available on the World Wide Web.
|
4 |
Monitoring the esterification reactions of carboxylic acids with alcohols using near-infrared spectrocopy and multivariate calibration methods/Öztürk, Betül. Özerdem, Durmuş January 2003 (has links) (PDF)
Thesis (Master)--İzmir Institute of Technology,İzmir, 2003 / Includes bibliographical references (leaves. 81-84).
|
5 |
Application of near infrared spectroscopy in meat quality assessment /Ding, Haibiao. January 1999 (has links)
Thesis (Ph. D.)--University of Hong Kong, 1999. / Includes bibliographical references.
|
6 |
Applications of a photodiode array spectrophotometer for the short wavelength near-infrared region (700-1100 nm) /Mayes, David M. January 1990 (has links)
Thesis (Ph. D.)--University of Washington, 1990. / Vita. Includes bibliographical references (leaves [139]-145).
|
7 |
Improving the robustness of multivariate calibration models for the determination of glucose by near-infrared spectroscopyKramer, Kirsten Elizabeth. January 2005 (has links)
Thesis (Ph. D.)--University of Iowa, 2005. / Includes bibliographical references (leaves 272-282).
|
8 |
Hydrogen bonding in the near infraredHoward, Daryl L., n/a January 2006 (has links)
OH-stretching spectra of various vapour phase species were recorded to investigate hydrogen bonding. The species studied include 1,2-ethanediol, 1,3-propanediol, 1,4-butanediol, acetylacetone, hexafluoroacetylacetone and the complex formed in the heterogeneous mixture of methanol and trimethylamine. The spectra range from the infrared, near infrared to visible wavelengths. The main focus of this study is in the near infrared region, in which the OH-stretching overtones are dominant.
The near infrared and visible spectrum of formic acid has been recorded to investigate coupling across bonds, specifically a resonance occurring between OH- and CH-stretching vibrations. The same resonance was also observed in the spectrum of 1,2-ethanediol. The spectra of deuterated isotopomers of formic acid and 1,2-ethanediol were recorded to experimentally verify the resonance.
The inherently weak nature of the vibrational overtone transitions required sensitive spectroscopic techniques to observe the spectra. The spectra were recorded with conventional long path length absorption spectroscopy and intracavity laser photoacoustic spectroscopy.
Anharmonic oscillator local mode calculations of the OH-stretching transitions were performed to simulate the observed spectra. These calculations require calculation of potential energy surfaces and dipole moment functions. Simulated spectra obtained with highly correlated ab initio methods and large basis sets have yielded the best agreement with observation.
|
9 |
Optimisation of retention of mangiferin in Cyclopia subteranata during preparation for drying and storage of green honeybush and development of NIR spectroscopy calibration models for rapid quantification of mangiferin and xanthone contents /Maicu, Maria Christina. January 2008 (has links)
Thesis (MSc)--University of Stellenbosch, 2008. / Bibliography. Also available via the Internet.
|
10 |
Designing and Implementing a Portable Near-Infrared Imaging System for Monitoring of Human’s Functional Brain ActivityRakhshani Fatmehsari, Younes 29 January 2015 (has links)
Functional near-infrared spectroscopy (fNIRS) is a non-invasive technique for monitoring of brain functional activity. It uses near-infrared (NIR) light to get the information related to brain hemodynamic response as most of the tissues in the brain are transparent to NIR light.
The main goal of this study was to design, implement and evaluate a continuous-wave near-infrared spectroscopy (CW-NIRS) system for human’s brain cognitive functions. This system is portable, and works with a small rechargeable battery; thus, it may be used for bedside monitoring. In our CW-NIRS system, we used 3 multi-wavelength LEDs and 8 photodiodes (with built-in amplifiers) resulting in 12 channels (voxels). The collected signals of these 12 channels, at a sampling rate of 15 Hz, can be used for 2D image reconstruction to monitor functional brain activity. All LEDs and photodiodes are placed on a flexible printed circuit board (PCB), which covers the forehead to measure hemodynamic response of the prefrontal cortex. We also developed a software in MATLAB for analysis of optical signals recorded by our CW-NIRS system. This software provides 2D image reconstruction and monitoring of changes in concentration of oxygenated ([HbO2]) and deoxygenated ([HbR]) hemoglobin as well as the total hemoglobin ([HbT]) for the 12 channels over the prefrontal cortex (forehead). The software has also an embedded statistical analysis option for analyzing the collected signals and displaying the results.
The developed CW-NIRS system was evaluated on 14 individuals (24±3 years old) on two common cognitive tasks: verbal fluency task (VFT) and color distinction task (CDT). In both tests, we observed that as the cognitive task begins [HbO2] and [HbT] increase and [HbR] decreases, after a few seconds delay. Furthermore, at the end of the tasks as subjects close their eyes in the second rest state, all three hemodynamic signals converge toward baseline ([HbO2] and [HbT] decrease and [HbR] increases). Also, the difference between hemodynamic signals at the rest state and task state was highly significant (p < 9.95e-11) in all 12 channels and in both cognitive tasks. The results confirm the ability of the designed CW-NIRS system to detect functional brain activities.
|
Page generated in 0.0394 seconds