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Dissertations / Theses on the topic 'UV'

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1

Roig, Benoît. "Couplage UV/UV : applications analytiques environnementales." Aix-Marseille 1, 1999. http://www.theses.fr/1999AIX11052.

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L'objectif de cette etude est de proposer des methodes de mesure simples et rapides de la qualite des eaux, pouvant se substituer aux methodes de reference. Pour cela, des techniques basees sur l'utilisation de rayonnement ultraviolet (reactions photochimiques et spectrophotometrie) ont ete utilisees au sein d'un nouveau concept appele couplage uv/uv. L'interet et l'efficacite de ce couplage ont ete prouves au travers de differentes applications environnementales comme la determination de parametres de pollution des eaux que sont les formes azotees et phosphorees. Les procedures developpees so
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2

McGonigle, A. J. S. "Tunable UV lasers." Thesis, University of Oxford, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.343230.

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3

Rizzini, Luca [Verfasser], and Roman [Akademischer Betreuer] Ulm. "UVR8: a plant UV-B photoreceptor = UVR8: ein pflanzlicher UV-B Photorezeptor." Freiburg : Universität, 2011. http://d-nb.info/1123457891/34.

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4

Headland, Lauren R. "UV-resistance locus 8 and UV-B specific signaling in Arabidopsis thaliana." Thesis, University of Glasgow, 2010. http://theses.gla.ac.uk/1757/.

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UV-B is a natural component of the sunlight spectrum. As a result of the potentially harmful effects of this radiation, plants have evolved a highly effective suit of protective and repair mechanisms. However, the signalling pathways that control such responses are not yet well known. For example while the photoreceptors responsible for red and blue light responses are well characterised, no such UV-B photoreceptor has yet been identified. Despite this particularly large gap in our knowledge, previous work identified the first UV- B specific signalling component which, unlike the more general
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5

Peng, Sheng. "Ultraviolet sources for advanced applications in the vacuum UV and near UV." W&M ScholarWorks, 2004. https://scholarworks.wm.edu/etd/1539623467.

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This dissertation documents a systematic study consisting of experimental investigations and theoretical analyses of intense ultraviolet sources in VUV and near-UV. Some engineering issues regarding two prototypes of electrodeless lamps using rf and microwave are discussed.;Various excimers that produce intense UV light are investigated, including: (1) A benchmark Xe2 excimer which has been proven to be very efficient in our novel rf capacitively coupled discharge lamp; (2) A rarely studied excimer, KrI, which suffers from predissociation and was reported to be very weak or invisible by most o
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6

Mead, C. J. "Some UV curable systems." Thesis, University of Kent, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.252581.

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7

Patil, Raj. "Deep UV Raman Spectroscopy." Thesis, The University of Arizona, 2016. http://hdl.handle.net/10150/613378.

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This thesis examines the performance of a custom built deep UV laser (257.5nm) for Raman spectroscopy and the advantages of Raman spectroscopy with a laser in the deep UV over a laser in the visible range (532 nm). It describes the theory of resonance Raman scattering, the experimental setup for Raman spectroscopy and a few Raman spectroscopy measurements. The measurements were performed on biological samples oak tree leaf and lactobacillus acidophilus and bifidobacteria from probotioc medicinal capsules. Fluorescence free Raman spectra were acquired for the two samples with 257.5 nm laser. Th
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8

Chittavanich, Pongsith P. "Pigmented UV-Curable Alkyd." University of Akron / OhioLINK, 2009. http://rave.ohiolink.edu/etdc/view?acc_num=akron1259614294.

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9

Xu, Tong. "UV-Curable Hybrid Polyurethanes." University of Akron / OhioLINK, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=akron1406471515.

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10

Keltner, Lucas A. "UV Properties of Galileons." Case Western Reserve University School of Graduate Studies / OhioLINK, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=case1436970587.

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11

Xu, Rongcheng Xu. "Anticorrosion UV Curable Alkyds." University of Akron / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=akron1510747493751126.

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12

Pavelka, Radek. "Detekce nánosu UV lepidla." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2018. http://www.nusl.cz/ntk/nusl-377342.

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This diploma thesis focuses on a design of camera control system used for detecting defects, appearing during a UV luminescent glue application on the bottom of a paper bag. As a part of this thesis, an application was developed, using Baumer VCXG-53C industrial camera, implementing two dierent control methods - 2D cross correlation image pattern matching based on previously user defined pattern and glue area size measuring based on binary segmented image. The result of this work is a fully developed control system, prepared to be put into operation at the customer’s production line.
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13

Třešňáková, Andrea. "Materiálový tisk UV dozimetrů." Master's thesis, Vysoké učení technické v Brně. Fakulta chemická, 2017. http://www.nusl.cz/ntk/nusl-316153.

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The subject of this theses is a preparation of chemical UV dosimeters working on diverse principles and their printing. Three UV dosimeters were prepared. The first one is based on a photocalalytic reaction of titanium dioxide with redox dyes. Two other dosimeters are based on a reaction of a photolabile substance able to produce an intermediate reacting with a dye. Prepared dosimeter compositions were coated using a material roll-to-roll printing machine on a corona-treated PET foil. Prepared dosimeter compositions were calibrated for desired exposition to UV radiation doses. Validity of a re
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14

Huang, Ying. "Applications of UV/H2O2, UV/NO3–, and UV-vis/ferrite/sulfite Advanced Oxidation Processes to Remove Contaminants of Emerging Concern for Wastewater Treatment." University of Cincinnati / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1535703890003601.

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15

Ye, Zhengcai. "UV Disinfection between Concentric Cylinders." Diss., Georgia Institute of Technology, 2007. http://hdl.handle.net/1853/14641.

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Outbreaks of food-born illness associated with the consumption of unpasteurized juice and apple cider have resulted in a rule published by the U.S. Food and Drug Administration (FDA) in order to improve the safety of juice products. The rule (21 CFR120) requires manufacturers of juice products to develop a Hazard Analysis and Critical Control Point (HACCP) plan and to achieve a 5-log reduction in the number of the most resistant pathogens. Ultraviolet (UV) disinfection is one of the promising methods to reach this 5-log reduction of pathogens. The absorption coefficients of juices typically va
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16

Schreier, Wolfgang. "UV-Strahlung und DNA-Schäden." Diss., lmu, 2008. http://nbn-resolving.de/urn:nbn:de:bvb:19-87818.

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17

Nilsson, Henric. "UV-tork - analys av drift :." Thesis, Karlstads universitet, Avdelningen för maskin- och materialteknik, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-14259.

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18

Grant, Robert Wallace. "A UV Zeeman-effect polarizer." Thesis, University of British Columbia, 1985. http://hdl.handle.net/2429/24674.

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It is shown that light emitted by mercury vapour at 253.7 nm can be polarized by passing the light through mercury absorption gas embedded in a magnetic field which is transverse to the direction of propagation of the light. The absorption lines of the mercury are split by the Zeeman effect, so that the absorber has an absorption coefficient which depends on both the polarization and wavelength of the transmitted light. A complete theory for the Hg²⁰² isotope is presented and the results are compared to measurements made with a natural mercury emitter and absorber. The observations are in qua
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19

Pinho, George Paul. "UV laser ablation of metals." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape9/PQDD_0016/NQ38265.pdf.

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20

Forster, Piers Maxwell de Ferranti. "Measuring and modelling UV radiation." Thesis, University of Reading, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.384875.

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21

Kantola, J. (Joni). "UV-absorboivat selluloosananokiteet kalvojen lisäaineena." Bachelor's thesis, University of Oulu, 2016. http://urn.fi/URN:NBN:fi:oulu-201605171790.

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Tämän työn tavoitteena oli tutkia UV-absorboivien selluloosananokiteiden valmistusta ja käyttöä kalvojen lisäaineena estämään UV-säteiden läpäisyä sekä toimimaan lujitteena kalvomateriaalissa. Työn kirjallisuuskatsauksessa etsittiin tietoa selluloosasta, selluloosananokiteistä, selluloosananokidekomposiittien ominaisuuksista sekä metallinanopartikkeleiden käytöstä kalvorakenteissa. Työ koostui pääasiassa kokeellisesta osiosta, jossa valmistettiin perjodaattihapetuksen avulla UV-absorboivia selluloosananokiteitä, joita käytettiin polyvinyylialkoholifilmien lisäaineena. Työssä valmistettiin vii
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22

Emmerson, Gregory Daniel. "Novel direct UV written devices." Thesis, University of Southampton, 2003. https://eprints.soton.ac.uk/42435/.

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This thesis reports a series of developments based on UV writing of novel waveguide structures. The first section is an investigation into the production of Direct UV-written channel waveguides on the perimeter of a cylindrical substrate. Cylindrical waveguides were produced using variants of the Modified Chemical Vapour Deposition (MCVD) and Flame Hydrolysis Deposition for the fabrication of thin films on either surface of the cylinder. Three layer, buried waveguide structures were produced using three techniques, and channel waveguides Directly UV-written into one of the samples. The second
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23

Adikan, Faisal Rafiq Mahamd. "Direct UV-written waveguide devices." Thesis, University of Southampton, 2007. https://eprints.soton.ac.uk/65507/.

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This thesis describes a series of experimental studies concerning waveguide structures based on the direct UV and direct grating writing fabrication techniques. The latter approach allows simultaneous definition of waveguide structures and Bragg gratings. The first result of this work describes the fabrication and characterisation of small angle X-couplers that exhibit low polarisation and wavelength dependence. Maximum and minimum coupling ratios of 95% (±0.8%) and 1.9% (±1%) respectively with typical excess loss of 1.0dB (±0.5dB) were recorded. Device modelling using Beam Propagation Method
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24

Ahmed, Masud Omar. "Teststation för industriella UV-celler." Thesis, Umeå universitet, Institutionen för tillämpad fysik och elektronik, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-165036.

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GE Healthcare Bio-Sciences AB in Umeå produce a variety of chromatography systems. One of the main components in chromatography is the UV module, which measure the light absorption of different wavelengths in the liquid being pumped through a cell. Currently at the Umeå site two types of UV-cells are produced; lab cells and industrial cells. The current test station for the industrial UV-cells is outdated, in disrepair and no longer supported.  GE has developed a test station for the lab cells that evaluates UV and flow properties, the data is stored in GE’s own production database, Prodas. Th
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25

Neto, Miguel Angelo da Costa. "Emissões UV em diamantes naturais." Master's thesis, Universidade de Aveiro, 1997. http://hdl.handle.net/10773/17469.

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Mestrado em Física<br>Nesta tese são estudados centros ópticos que aparecem na região UV do espectro electromagnético de um diamante natural tipo Ia. Longe de pretender ser um estudo pormenorizado e exaustivo desses centros ópticos, esta tese visa fundamentalmente o aprofundamento e respectiva aplicação de conhecimentos adquiridos ao longo da licenciatura e inestrado. No primeiro capítulo desta tese é apresentada uma descrição das principais propriedades fisicas dos diamantes, assim como a sua classificação. No segundo capítulo é feita a caracterização e distinção de defeitos e centros
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26

McGivney, Eric. "Comparison of UV-C and Vacuum- UV induced AOT on the acute mortality of microalgae." Thesis, KTH, Mark- och vattenteknik, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-171839.

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Advanced oxidation technology (AOT) has been used to destroy microorganisms in ballast water by breaking down the cell membranes. The primary objective of this study was to determine the effects of a ballast water treatment system that uses a combination of UV-C (λ=254 nm), Vacuum-UV (VUV; λ=185 nm) and photocatalytic titanium dioxide (TiO2) on a freshwater algae, Pseudokirchneriella subcapitata, and a marine algae, Tetraselmis suecica. The coupling of a semiconductor, such as TiO2, with a UV source is known as an advanced oxidative technology (AOT). To test the effects of TiO2 and wave length
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27

Lani, Mohd Nizam. "Inactivation of Lysteria monocytogenes by pulsed UV illumination and photorepair recovery of UV-damaged cells." Thesis, University of Strathclyde, 2007. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.443144.

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28

Devant, Ludovic. "Etude des mécanismes de vieillissement d'un caoutchouc EPDM (Ethylène Propylène Diene Monomer)." Thesis, Orléans, 2011. http://www.theses.fr/2011ORLE2067.

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Ce travail de thèse est consacré à l’étude du vieillissement UV d’un caoutchouc EPDM (éthylène propylène diène monomère) avec une attention spéciale sur les additifs du système de vulcanisation. Pour cela nous avons utilisé des techniques particulièrement adaptées à l’analyse de surface telles que le ToF-SIMS, l’XPS, l’ATR-FTIR, le MEB-EDX et l’AFM. Dans un premier temps nous avons pu déterminer la composition chimique de la surface du caoutchouc EPDM vulcanisé à l’état initial. Nous avons pu identifier les sous-produits de vulcanisation et déterminer de manière qualitative leur répartition en
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29

Narayan, Vicrant S. "HPLC analysis of nucleotides." Thesis, Queensland University of Technology, 2017. https://eprints.qut.edu.au/104440/1/Vicrant_Narayan_Thesis.pdf.

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This project developed a novel hydrophilic interaction chromatography method for the detection and identification of nucleotides. The method was validated by testing biological specimens; adult and neonatal saliva, and red and white blood cell extracts. The project discovered an interesting difference between the adult and neonatal saliva specimens. The neonatal saliva contained 5 additional nucleotides and the nucleotides were present in greater concentrations, when compared to the concentrations in adult saliva. With further optimisation this method may be applied to testing in Pathology ser
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30

Olsson, Sara. "Enhancing UV-protection of clear coated wood by utilizing reactive UV-absorber and epoxyfunctionalized soybean oil." Licentiate thesis, KTH, Ytbehandlingsteknik, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-92220.

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This work presents the development of a new pretreatment for clear coated wood, that aims to increase the photoprotection of exterior wood products, and at the same time make the system more environmentally friendly. The pretreatment comprises the reactive UV absorber 2-hydroxy-4(2,3-epoxy­propoxy)-benzophenone (HEPBP), which has a primary epoxy group that can be covalently attached to the hydroxyl groups of the wood substrate. This reactant is accompanied by renewable epoxy functionalized soybean oil (ESBO), which contains a secondary epoxy group that also has the ability to react with the su
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Bagheri, Mehdi. "Computer-aided study of Vacuum-UV/UV process for removal of organic pollutants from water supplies." Thesis, University of British Columbia, 2015. http://hdl.handle.net/2429/57463.

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Water authorities are increasingly worried about the occurrence of organic micropollutants (e.g., algal toxins, endocrine disrupting compounds, pesticides, industrial chemicals, taste and odor compounds) in water supplies. Removal of organic micropollutants (OMPs) from water is cost-prohibitive, particularly for small and remote communities. Vacuum-UV/UV process, an incipient catalyst/chemical-free advanced oxidation process (AOP), is potentially a cost-effective solution for removal of harmful micropollutants from water. The main objective of this thesis was to investigate the feasibility o
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32

Chintalapati, Pranav Sankar. "Degradation of cyanobacterial toxin microcystin-LR using UV/vacuum-UV advanced oxidation for drinking water treatment." Thesis, University of British Columbia, 2017. http://hdl.handle.net/2429/63028.

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Cyanobacterial blooms have been increasing in magnitude and frequency around the world and studies have concluded that climate change, population growth, and industrial development will accelerate this phenomenon. The presence of cyanobacterial blooms in drinking water sources is a concern due to the production of cyanobacterial toxins, which are known to damage internal organs and disrupt nervous system functions. Shallow surface water sources for small water systems are at a greater risk of eutrophication and small, remote communities often lack the resources and infrastructure for adequat
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33

Sarrut, Morgan. "Optimisation de méthodes bidimensionnelles en ligne LCxLC-UV/MS et LCxSFC-UV pour l’analyse d’échantillons complexes." Thesis, Lyon, 2016. http://www.theses.fr/2016LYSE1189/document.

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La chromatographie en phase liquide bidimensionnelle « comprehensive » en ligne (LCxLC) est une technique à très haut pouvoir de séparation. Après avoir établi son intérêt mais aussi les enjeux liés au développement de méthodes et les conditions expérimentales utilisées, une attention particulière est portée à l'optimisation des méthodes en LCxLC. Une procédure d'optimisation basée une méthode « Pareto-optimal » est décrite. Les conditions optimales prédites sont ensuite appliquées à la séparation RPLCxRPLC d'un mélange complexe de peptides et comparée avec la 1D-RPLC en termes de capacité de
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34

Klein, Fátima Rosane Schuquel. "Alterações bioquímicas em espécies do gênero Alternanthera quando expostas à radiação UV-B e UV-C." Universidade Federal de Pelotas, 2014. http://repositorio.ufpel.edu.br/handle/ri/2008.

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Made available in DSpace on 2014-08-20T13:59:08Z (GMT). No. of bitstreams: 1 dissertacao_fatima_rosane_klein.pdf: 1108729 bytes, checksum: f7f58ac213a22aa01320b606d8028f60 (MD5) Previous issue date: 2014-02-21<br>The knowledge about ultraviolet (UV) effects in medicinal plants is still limited when compared with what is already known about other environmental factors. To investigate this issue we carried out two experiments: the first aimed to study the production of betalains, total flavonoid, and antioxidant activity in plants of Alternanthera sessilis, Alternanthera brasiliana, Alternan
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Tjörnhammar, Staffan. "Pulsed Yb:KYW laser and UV generation." Thesis, KTH, Laserfysik, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-51595.

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In this master thesis project, a pulsed UV laser was designed and constructed. Also, the effects of absorption in a volume Bragg grating were investigated. The laser was diode pumped and constructed with Yb:KYW as gain medium. The lasing was at a wavelength of 1029.2 nm with a spectral bandwidth of 0.23 nm, locked by a volume Bragg grating that was used as input coupler for spectral control. Passive Q‑switching was used to generate pulses by placing a Cr:YAG saturable absorber inside the cavity. The laser generated radiation with a maximum peak power of 3.8 kW at an average power of 0.35 W, a
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36

Borgström, Roger, and Daniel Enesten. "Uv-ljus som vattenrening i kylanläggning." Thesis, Högskolan i Halmstad, Sektionen för Informationsvetenskap, Data– och Elektroteknik (IDE), 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:hh:diva-19096.

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I det här projektet har uppgiften varit att rena vattnet i Aqua Interiör i Laholms egen tillverkade vattenmöbel med hjälp av uv-ljus. Dessa möbler hyr de ut till kunder för att kunna få ett lagom kallt vatten med eller utan kolsyra. Vattenmöblerna är direkt kopplade till det befintliga vattensystemet. Ett problem som de tidigare haft är att de inte kunnat ha sina möbler på sjukhus eftersom möblens beskaffenhet medför en ökad bakteriehalt i vattnet.Denna bakteriehalt kommer dock inte upp till den gräns som livsmedelverkets satt som icke tjänligt. På sjukhus finns ett högre krav på vattnets kval
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37

Bykov, Vladimir J. "UV-induced DNA damage in humans /." Stockholm, 1999. http://diss.kib.ki.se/1999/91-628-3345-6/.

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38

Wissen, Matthias. "Thermisches Nanoimprint in UV vernetzende Fotolacke." Tönning Lübeck Marburg Der Andere Verl, 2007. http://d-nb.info/988176343/04.

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39

Taylor, Tammye L. "UV photochemistry of synthetic model peptides." Thesis, Georgia Institute of Technology, 1994. http://hdl.handle.net/1853/26966.

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Greuters, Jako. "UV laser micromachining of photonics materials." Thesis, University of Hull, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.431044.

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Houghton, Steven. "Hyperbranched polyesters in UV-curable coatings." Thesis, University of Kent, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.274354.

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Erdemli, Ӧmer Can. "UV stabilisation of poly(ethylene terephthalate)." Thesis, University of Strathclyde, 2016. http://digitool.lib.strath.ac.uk:80/R/?func=dbin-jump-full&object_id=27455.

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43

Waldron, Daniel E. "Instrument design in UV polarised spectroscopy." Thesis, University of Warwick, 2011. http://wrap.warwick.ac.uk/51549/.

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Biological macromolecules are becoming increasingly important as a target for pharmaceutical research. Structural examination of this class of compounds is vital, both in terms of understanding the three-dimensional structures these molecules form as well as for quality control of bio-pharmaceutical products. UV polarised spectroscopy, such as circular dichroism (CD) is a powerful tool for this form of analysis, rapidly providing the user with structural information on the sample. The ease of data analysis combined with its non-destructive nature make UV polarised spectroscopy an ideal tool fo
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44

Weldegebriel, Amos. "A UV detector for microfluidic devices." Thesis, Kansas State University, 2014. http://hdl.handle.net/2097/17626.

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Master of Science<br>Department of Chemistry<br>Christopher T. Culbertson<br>Chemical separation involves selective movement of a component out of a region shared by multiple components into a region where it is the major occupant. The history of the field of chemical separations as a concept can be dated back to ancient times when people started improving the quality of life by separation of good materials from bad ones. Since then the field of chemical separation has become one of the most continually evolving branches of chemical science and encompasses numerous different techniques and pri
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45

Marlow, Gregory. "Week 08, Video 04: UV Unwrapping." Digital Commons @ East Tennessee State University, 2020. https://dc.etsu.edu/digital-animation-videos-oer/58.

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Marlow, Gregory. "Week 08, Video 05: UV Unfold." Digital Commons @ East Tennessee State University, 2020. https://dc.etsu.edu/digital-animation-videos-oer/59.

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Marlow, Gregory. "Week 08, Video 06: UV Export." Digital Commons @ East Tennessee State University, 2020. https://dc.etsu.edu/digital-animation-videos-oer/60.

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48

Touré, Mamadou Lamine. "Exposition UV spectrale : instrumentation et modélisation." Université Joseph Fourier (Grenoble), 2003. http://www.theses.fr/2003GRE10034.

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Houët, Mickaël Brogniez Colette. "Spectroradiométrie du rayonnement UV au sol." [S.l.] : [s.n.], 2003. http://www.univ-lille1.fr/bustl-grisemine/pdf/extheses/50376-2003-149-150.pdf.

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50

Cui, Yong. "UV pumped holosteric optical parametric oscillator." Thesis, University of St Andrews, 1993. http://hdl.handle.net/10023/14889.

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The all-solid-state (or "holosteric") optical parametric oscillator has resulted from the recent development of diode-laser-pumped solid-state lasers and from recent advancements in new optically nonlinear materials. As a result, all-solid-state sources of widely tunable (ultraviolet - visible - near infrared) coherent radiation are now possible by using the radiation from diode-laser-pumped solid-state lasers, either directly or after frequency conversion, to pump optical parametric oscillators. Such devices can be made compact, efficient and reliable. The work described in this thesis explor
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