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Dissertations / Theses on the topic 'Mie spectroscopy'

Author: Grafiati

Published: 3 June 2025

Last updated: 31 July 2025

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1

Bassan, Paul. "Light scattering during infrared spectroscopic measurements of biomedical samples." Thesis, University of Manchester, 2011. https://www.research.manchester.ac.uk/portal/en/theses/light-scattering-during-infrared-spectroscopic-measurements-of-biomedical-samples(a2a41f54-0e61-443a-bd32-faf8f65806a7).html.

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Infrared (IR) spectroscopy has shown potential to quickly and non-destructively measure the chemical signatures of biomedical samples such as single biological cells, and tissue from biopsy. The size of a single cell (diameter ~10-50 µm) are of a similar magnitude to the mid-IR wavelengths of light (~1-10 µm) giving rise to Mie-type scattering. The result of this scattering is that chemical information is significantly distorted in the IR spectrum.Distortions in biomedical IR spectra are often observed as a broad oscillating baseline on which the absorbance spectrum is superimposed. A spectral

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2

Yahiaoui, Riad. "Caractérisation de métamatériaux pour applications millimétriques et submillimétriques." Thesis, Bordeaux 1, 2011. http://www.theses.fr/2011BOR14321/document.

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Ce mémoire de thèse est consacré à l'étude, la fabrication et la caractérisation de métamatériaux en vue d'applications dans le domaine millimétrique et submillimétrique. Dans un premier temps, nous avons tenu à rappeler les propriétés remarquables ainsi que les processus physiques mis en jeux par cette nouvelle génération de matériaux. Le manuscrit regroupe essentiellement des résultats issus d’études réalisées sur différentes structures en microondes et en terahertz : métamatériaux composites, métamatériaux entièrement diélectriques à base de résonances de Mie, ouvertures sublongueur d’ondes

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3

Trevitt, Adam John. "Ion trap studies of single microparticles : optical resonances and mass spectrometry /." Connect to thesis, 2006. http://eprints.unimelb.edu.au/archive/00003039.

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4

Nonoyama, Akihisa. "Using Multiwavelength UV-Visible Spectroscopy for the Characterization of Red Blood Cells: An Investigation of Hypochromism." [Tampa, Fla.] : University of South Florida, 2004. http://purl.fcla.edu/fcla/etd/SFE0000508.

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5

Flajšmanová, Jana. "Měření extinkčních spekter opticky zachycených plazmonických nanočástic." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2015. http://www.nusl.cz/ntk/nusl-232025.

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This thesis deals with the dark-field imaging and the optical spectroscopy of optically trapped plasmonic nanoparticles. The optical trapping and the characterization of a single particle or multiple nanoparticles as well are demonstrated. The number of the optically trapped particles can be estimated from the dark-field scattering intensity. Experiments show the presence of the interparticle coupling among trapped metallic nanoparticles which has not been observed in case of dielectric particles. The scattering spectra of the plasmonic nanoparticles were compared with theoretical models based

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6

Selmke, Markus. "Photothermal Single Particle Detection in Theory & Experiments." Doctoral thesis, Universitätsbibliothek Leipzig, 2013. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-126286.

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The dissertation presents theoretical and experimental studies on the physical origin of the signal in photothermal microscopy of single particles. This noninvasive optical far field microscopy scheme allows the imaging and detection of single absorbing nanoparticles. Based on a heat-induced pertur- bation in the refractive index in the embedding medium of the nanoscopic absorber, a corresponding probe beam modification is measured and quantified. The method is well established and has been applied since its first demonstration in 2002 to the imaging and characterization of various absorbing p

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7

Kemsley, Evelyn Katherine. "Some problems in quantitative mid-infrared spectroscopy." Thesis, Open University, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.264465.

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8

Rini, Matteo. "Femtosecond mid-infrared spectroscopy of elementary photoinduced reactions." Doctoral thesis, [S.l. : s.n.], 2003. http://deposit.ddb.de/cgi-bin/dokserv?idn=970187912.

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9

Lewis, Michael K. "Spectroscopy of semiconductor nanostructures for Mid-IR photonics." Thesis, University of Surrey, 2013. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.604321.

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Quantum dot structures of InAs(Sb)/InGaAs/InP designed as easy to fabricate, low cost "mid-IR emitting lasers, have been spectroscopically characterised using temperature and power dependent photoluminescence. These structures have been simulated using a truncated pyramid structure in the Nextnano software package. The results show that the observed experimental data is the result Of a . bimodal dot distribution in both samples. In the InAs case, the bimodal behaviour is the result of varying width dots (35nm and 38.5nm). In the InAsSb case the dot groups were calculated to contain - 10% and z

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10

Manfred, Katherine Marya. "Mid-infrared laser spectroscopy for trace gas detection." Thesis, University of Oxford, 2015. https://ora.ox.ac.uk/objects/uuid:0d562d89-8a28-4122-8154-bf14dbbddd9a.

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Laser spectroscopy offers a powerful and adaptable toolkit of techniques for sensitive and selective gas detection. New semiconductor laser sources that can emit high power midinfrared radiation at room temperature have reawakened interest in exploiting the spectrally separated, strongly absorbing ro-vibrational transitions in this region. The aim of this thesis is the demonstration of absorption spectroscopy methods with interband cascade lasers (ICLs) and quantum cascade lasers (QCLs) to detect gases relevant to physiology and atmospheric science. Modulation of laser frequency via the inject

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11

Oliveira, Gabrieli Alves de. "Determinação de parâmetros de qualidade do maracujá (passiflora edulis f. flavicarpa) por espectroscopia mid e nir e calibração multivariada." Thesis, Avignon, 2014. http://www.theses.fr/2014AVIG0659/document.

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La variété des climats et des sols du Brésil assure une production de fruits diversifiée au cours de toutes les saisons de l'année. Ainsi, le pays gagne en importance dans le domaine de l'horticulture. Le fruit de la passion est un fruit dont la production s’est développée au cours des dernières années dans et hors du pays en raison de l'augmentation de la consommation de fruits frais et de produits dérivés de la pulpe. Pour le meilleur usage des fruits, il est nécessaire de connaître les principaux paramètres de qualité. Les fruits sont des produits hautement périssables et dont le métabolism

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12

Matthews, Mary Rebecca. "Spectroscopy and Photoconductivity Studies of Intersubband Mid-Infrared Detectors." Thesis, Imperial College London, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.508793.

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13

Ng, Wartini. "Contemporary data analytics for soil spectroscopy." Thesis, The University of Sydney, 2019. http://hdl.handle.net/2123/21071.

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No soil, no life. Know soil, know life. Soil provides the basis for life. To promote soil security, soil monitoring is essential. However, conventional methods of soil analysis are costly and time-consuming. This thesis explores contemporary data analytics for analyzing soil infrared spectroscopy data. New data analytics take soil infrared spectral data and convert them to soil properties that are useful for assessing its conditions. This thesis deals with issues of sampling, spectral reduction techniques, deep learning models, and application in soil contamination assessment. Soil spectral da

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14

Darwish, Gamal S. "Proximate analysis of fish tissue by mid-infrared transmission spectroscopy." Thesis, McGill University, 1988. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=61863.

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15

Anacona, J. R. "Far infrared and mid infrared laser spectroscopy of free radicals." Thesis, University of Cambridge, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.304717.

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16

Wang, Ziyu [Verfasser], and Hans [Akademischer Betreuer] Zappe. "Compact fabry-perot filters for mid-infrared spectroscopy in microreactors." Freiburg : Universität, 2021. http://d-nb.info/1229349065/34.

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17

Adato, Ronen. "Mid-infrared plasmonics for ultra-sensitive spectroscopy of biomolecular interactions." Thesis, Boston University, 2013. https://hdl.handle.net/2144/12705.

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Thesis (Ph.D.)--Boston University PLEASE NOTE: Boston University Libraries did not receive an Authorization To Manage form for this thesis or dissertation. It is therefore not openly accessible, though it may be available by request. If you are the author or principal advisor of this work and would like to request open access for it, please contact us at open-help@bu.edu. Thank you.<br>Mid-infrared (IR) absorption spectroscopy contrasts with numerous other biosensing methods in that it can directly probe molecular structure via bond specific vibrational modes and monitor structural changes ev

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18

Dupont, Hippolyte. "Lasers solides émettant à 2,3 µm à base de cristaux dopés au thulium : Comprendre la spectroscopie pour améliorer l'efficacité." Electronic Thesis or Diss., université Paris-Saclay, 2024. http://www.theses.fr/2024UPASP126.

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Cette thèse porte sur l'étude de la transition 3H4 vers 3H5 du thulium pour une émission autour de 2,3 µm dans les lasers solides, avec des applications potentielles pour la détection de molécules. Les précédentes efficacités et puissances reportées dans la littérature étant relativement faibles, diverses méthodes de pompage ont été explorées pour améliorer les rendements de ces sources en se basant une étude approfondie de la spectroscopie du thulium, tant d'un point de vue théorique qu'expérimental. Nous avons dans un premier temps tenté d'optimiser le pompage classique à 0,8 µm depuis l'éta

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19

Joudiou, Nicolas. "Développement de méthodes de spectroscopie par résonance magnétique localisée pour l’étude du métabolisme chez le petit animal." Thesis, Orléans, 2013. http://www.theses.fr/2013ORLE2044/document.

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Le travail présenté ici a consisté en la mise au point d’une méthode de spectroscopie localisée proton filtrée carbone 13C chez la souris ainsi que de la mise en place d’un protocole pour des acquisitions, in vivo, de spectroscopie localisée en rotation à l’angle magique sur la drosophile. Le travail sur la souris a en particulier porté sur l’effet d’un traitement antivasculaire sur des tumeurs cérébrales. Pour réaliser cette étude il a également fallu concevoir une sonde de mesure (support + détecteur) spécialement dédiée à ce type d’étude. Le travail a permis de mettre en évidence l’apport d

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20

Gevaux, David Graham. "Spectroscopic study of mid-infrared light emitting diodes." Thesis, Imperial College London, 2003. http://hdl.handle.net/10044/1/8253.

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21

Soulby, Michael Richard. "Mid-infrared spectroscopic studies of quantum cascade lasers." Thesis, University of Sheffield, 2010. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.527223.

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22

Amrania, Hemmel. "Ultrafast Mid-Infrared Spectroscopic Imaging with Biomedical Applications." Thesis, Imperial College London, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.526408.

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23

Hettich, Mike [Verfasser]. "Investigation of Multilayer Systems by Coherent Acoustic Phonon Spectroscopy / Mike Hettich." München : Verlag Dr. Hut, 2014. http://d-nb.info/1055863508/34.

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24

Araujo, Suzana Romeiro. "Reflectance spectroscopy vis-NIR and mid-IR applied for soil studies." Universidade de São Paulo, 2013. http://www.teses.usp.br/teses/disponiveis/11/11140/tde-02042013-133023/.

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Effective agricultural planning and environmental monitoring requires basic soil information. However, analyzing soil properties by conventional methods is often expensive and time consuming. In addition, these analyses result in chemical residues, which may be environmentally hazardous. In recent decades near-infrared diffuse reflectance spectroscopy (400-2500 nm) has been shown to be a viable alternative for rapidly analyzing soil properties. Information needs to be mathematically extracted from the spectra in order to correlate them with soil properties, and multivariate statistics are ofte

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25

Gyamfi, Mike [Verfasser]. "Scanning Tunneling Microscopy and Spectroscopy of Adatoms on Graphene / Mike Gyamfi." München : Verlag Dr. Hut, 2012. http://d-nb.info/1025821254/34.

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26

Bruhns, Henry. "Hydrocarbon detection based on mid-infrared photoacoustic spectroscopy with an OPO." Thesis, University of the West of Scotland, 2016. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.733774.

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27

Kang, Misun. "Quantification of soil organic carbon using mid- and near- DRIFT spectroscopy." Texas A&M University, 2002. http://hdl.handle.net/1969/462.

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28

Whittaker, Kimberley Elaine. "Development and application of spectroscopic techniques in the mid-infrared." Thesis, University of Oxford, 2014. http://ora.ox.ac.uk/objects/uuid:3fe68179-e217-431b-81d6-37ebbfa0b361.

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Applications of laser absorption spectroscopy for trace gas detection are many and diverse, ranging from the environmental and atmospheric to the medical and industrial. The aim of creating a spectrometer which combines high sensitivities and selectivities (in order to measure small amounts of absorbers or species that are only weakly absorbing, in a complex background matrix) with a wide spectral coverage (to allow broadband absorbers or multi-component samples to be studied) can be realised by implementing three separate concepts: the exploitation of the strong, fundamental transitions of th

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29

Chazapish, Vassilis. "Mid-infrared saturation spectroscopy of III-V multi-quantum well intersubband transitions." Thesis, Imperial College London, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.265245.

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30

Hodges, Christopher James. "Tunable laser spectroscopy and wavelength measurement in the mid and near infrared." Thesis, University of Cambridge, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.387698.

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31

Landers, Emilee Kathleen. "Rapid Compositional Assessment of Tomato Fruit by Using Portable Mid-Infrared Spectroscopy." The Ohio State University, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=osu1417539506.

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32

Schoun, Stephen Bradley. "Attosecond High-Harmonic Spectroscopy of Atoms and Molecules Using Mid-Infrared Sources." The Ohio State University, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=osu1436853089.

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33

Elias, Christine. "Optical spectroscopy of hexagonal boron nitride : from bulk to monolayer." Thesis, Montpellier, 2020. http://www.theses.fr/2020MONTS054.

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Le nitrure de bore hexagonal (h-BN) ou « graphite blanc » est un semiconducteur qui possède une large bande interdite (~ 6 eV) et dont la structure cristalline est proche de celle du graphite : elle est formée par des plans d’atomes arrangés en nid d’abeilles. La liaison entre les plans est de type Van-der-Waals. En 2004, h-BN a démontré sa capacité d’émettre de manière efficace de la lumière dans l’UV profond (~200 nm) et cela sur des cristaux massifs synthétisés au Japon (NIMS). Ces résultats ont attiré l’attention de la communauté scientifique des semiconducteurs pour la possibilité de pouv

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34

Serapiglia, Gerard Brendan. "High intensity mid infra-red spectroscopy of intersubband transitions in semiconductor quantum wells." Thesis, Imperial College London, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.313400.

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35

Avramenko, K. A., A. S. Romanyuk, N. N. Roshina, et al. "Raman and Photoluminescence Study of ZnO Films Grown by Chemical Method." Thesis, Sumy State University, 2012. http://essuir.sumdu.edu.ua/handle/123456789/35010.

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In this paper phonon and emission properties of ZnO films grown by metalorganic chemical vapour deposition (MOCVD) at ambient pressure and by molecular beam epitaxy (MBE) are investigated using Raman and photoluminescence (PL) spectroscopy. It is shown that high-frequency shift of non-polar phonon modes corresponds to elastic compressive strain in the plane parallel to c-axis and is equal to 3.2×10−3 and 2.2×10−3 for ZnO film grown by MOCVD and MBE, respectively. The possibility of obtaining highquality ZnO films grown by MOCVD was demonstrated. When you are citing the document, use the f

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36

Luzinova, Yuliya. "Mid-infrared sensors for hydrocarbon analysis in extreme environments." Diss., Georgia Institute of Technology, 2010. http://hdl.handle.net/1853/41156.

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A number of MIR sensing platforms and methods were developed in this research work demonstrating potential applicability of MIR spectroscopy for studying hydrocarbon systems in extreme environments. First of all, the quantitative determination of the diamondoid compound adamantane in organic media utilizing IR-ATR spectroscopy at waveguide surfaces was established. The developed analytical strategy further enabled the successful detection of adamantane in real world crude oil samples. These reported efforts provide a promising outlook for detection and monitoring of diamondoid constituents

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37

Tran, Dang Bao An. "Widely tunable and SI-traceable frequency-comb-stabilised mid-infrared quantum cascade laser : application to high precision spectroscopic measurements of polyatomic molecules." Thesis, Sorbonne Paris Cité, 2019. http://www.theses.fr/2019USPCD060.

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Ce manuscrit présente le développement d’un spectromètre dans le moyen infra-rouge qui combine très haute résolution, accordabilité, sensibilité de détection et contrôle de la fréquence absolue. Un laser à cascade quantique (QCL) émettant à 10.3 μm est asservi en phase sur un peigne de fréquences optique lui-même stabilisé sur un laser ultrastable à 1.55 μm transmis par lien optique fibré à partir du LNE-SYRTE, où cette référence de fréquence est contrôlée par rapport aux étalons primaires. On obtient ainsi un QCL de largeur ~ 0.1 Hz, avec une stabilité meilleure que 10⁻¹⁵ à 1 s, et une incert

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Kasparian, Jérôme. "ÉTUDE DE SPECTROSCOPIE LINÉAIRE ET NON-LINÉAIRE D'AÉROSOLS ATMOSPHÉRIQUES." Phd thesis, Université Claude Bernard - Lyon I, 1997. http://tel.archives-ouvertes.fr/tel-00011446.

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Les aérosols atmosphériques sont une composante essentielle de la pollution urbaine et un agent clé de la physico-chimie de l'atmosphère. Néanmoins, ils sont très mal caractérisés et de nouvelles méthodes d'étude sont nécessaires. Dans ce but, le travail présenté suit trois axes.<br />Le premier axe est la mesure quantitative des aérosols urbains au-dessus de Lyon par une nouvelle méthode combinant la télédétection optique par lidar et l'analyse de particules prélevées par impaction sur des filtres classiques. La composition et la distribution de taille des aérosols prélevés sont déterminés pa

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Meenakarn, Chanchana. "A TEM investigation of atomic ordering in AlGaInP epilayers grown on GaAs (001) by gas-source MBE." Thesis, Imperial College London, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.324981.

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Wahl, Markus Solberg. "Micro-Photoluminescence Spectroscopy of Au-assisted MBE Grown AlGaAs Nanowires with Axial GaAs Inserts." Thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for elektronikk og telekommunikasjon, 2012. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-19338.

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AlGaAs nanowires (NWs) with axial GaAs inserts, grown with molecular beam epitaxy will be investigated with micro-photoluminescence spectroscopy, including CW and pulsed excitation at cryogenic and ambient temperatures.

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Cripps, Stuart Anthony. "Photomodulation spectroscopy and characterisation of both near and mid-infrared semiconductor materials and devices." Thesis, University of Surrey, 2007. http://epubs.surrey.ac.uk/726/.

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42

Corazzola, Alessandro. "Quantification of condensed tannins in red wines by Fourier transform mid-infrared spectroscopy (FTIR)." Master's thesis, ISA/UL, 2012. http://hdl.handle.net/10400.5/8609.

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Mestrado Vinifera EuroMaster - Instituto Superior de Agronomia<br>Grape-derived condensed tannins, also known as proanthocyanidins, are critical quality components for red wines. They have been subject of numerous studies in order to find a fast and reliable methodology for their quantification. In this work it has been tested the method using Fourier transform mid-infrared (FTIR) and chemometrics to quantify the amount of condensed tannins present in 88 different red wines, with the reference method of precipitation with methylcellulose. As well it has been provided a single laboratory valida

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Siqueira, Laurinda Fernanda Saldanha. "Multivariate classification and Fourier-Transform Mid- Infrared Spectroscopy (FT-MIR) in cancer prostate tissue." PROGRAMA DE P?S-GRADUA??O EM QU?MICA, 2017. https://repositorio.ufrn.br/jspui/handle/123456789/22512.

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Shirley, Katherine Anne. "The Effects of Particle Size and Albedo on Mid-Infrared Spectroscopy for the Moon." Thesis, State University of New York at Stony Brook, 2018. http://pqdtopen.proquest.com/#viewpdf?dispub=10823197.

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<p> Mid-infrared emissivity spectra are an extremely useful tool for determining bulk surface composition of planetary bodies. Our current interpretation of these spectra relies primarily on studies of spectra acquired in a terrestrial environment, which do not exhibit the same behavior as spectra measured on the surface of airless bodies like the Moon. From previous studies, we know that the environmental conditions in which mid-infrared spectra are measured affect the position and spectral contrast of spectral features used in compositional identification and analysis. The unique thermal env

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Hussain, Syed Ali [Verfasser], and Ferenc [Akademischer Betreuer] Krausz. "Field resolving spectrometer for mid-infrared molecular spectroscopy / Syed Ali Hussain ; Betreuer: Ferenc Krausz." München : Universitätsbibliothek der Ludwig-Maximilians-Universität, 2021. http://d-nb.info/1237221595/34.

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46

Toffanin, Valentina. "Phenotypic and genetic aspects of bovine milk technological traits predicted by mid-infrared spectroscopy." Doctoral thesis, Università degli studi di Padova, 2015. http://hdl.handle.net/11577/3423869.

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Italy is the first producer of Protected Designation of Origin (PDO) cheeses in Europe-28, and thus the dairy industry plays a central role in the agriculture and food sectors. About 70% of available milk in Italy is used for cheese production and 35% is transformed into PDO products. In the last few years, the interest for milk and dairy products has grown, especially in relation to their technological and healthy features. Coagulation properties, titratable acidity (TA) and mineral content of milk are among the main topics discussed at research and dairy industry level. Milk coagulation pro

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Castillon, Quentin. "Contribution à l’étude du soudage MIG-MAG sous mélanges Ar-CO₂-O₂ : diagnostics physiques et physico-chimiques du milieu." Thesis, Orléans, 2016. http://www.theses.fr/2016ORLE2026.

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Le soudage à l’arc avec fil fusible est un procédé très utilisé, mais la compréhension des mécanismes régissant son fonctionnement comporte toujours quelques interrogations compte tenu de sa complexité. La composition du gaz de protection a une très forte influence sur le procédé : l’ajout de gaz actif modifie, par exemple, le courant nécessaire à la transition entre les différents régimes et est responsable de l’apparition d’oxyde de fer (gangue) à l’extrémité du fil fusible. Pour mener à bien l’étude du soudage MIG-MAG sous mélanges Ar-CO₂-O₂, plusieurs études sont réalisées pour caractérise

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Davis, Nicholas Mark. "Mid-infrared spectroscopic instrumentation for airborne monitoring of atmospheric gas species." Thesis, Cranfield University, 2018. http://dspace.lib.cranfield.ac.uk/handle/1826/13506.

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Methane is a colourless, odourless gas that can be found extensively in nature. The average global concentration of methane is currently approximately 1.8ppm, the highest concentration for over 800,000 years. Although this concentration is signi cantly lower than that of CO2 (391ppm), methane has a global warming potential up to 34 times greater over a hundred year period. As a result, trace detection of atmospheric methane has gained increased attention as a form of environmental protection. The purpose of this thesis is to undertake investigations into the development of instrumentation to m

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Yik, Sau-lai. "The application of capillary electrophoresis with laser-induced fluorescence detection in quantifying the endogenous amino acid pool of mouse embryos /." Hong Kong : University of Hong Kong, 2000. http://sunzi.lib.hku.hk/hkuto/record.jsp?B21949098.

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Cummings, Beth L. "Applications of infrared laser spectroscopy to breath analysis." Thesis, University of Oxford, 2011. http://ora.ox.ac.uk/objects/uuid:5b6e0624-5982-457c-b13c-61484bace371.

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Abstract:

The work presented in this thesis is concerned with development of spectroscopic detection methods based on absorption spectroscopy using semiconductor lasers, with particular ref- erence to the ﬁeld of medical diagnostics through breath analysis. The ﬁrst part of this thesis deals with the design and testing of a prototype analyser for simultaneous monitoring of the exchange gases O<sub>2</sub> , CO<sub>2</sub> and H<sub>2</sub>O in breath. The aim of this analyser is to provide information required to monitor respiration, with potential use in intensive care monitoring or during anaesthesia.

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