Rozprawy doktorskie na temat „Organic matrix”
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Maccarone, Alan T. "Infrared spectroscopy of matrix isolated organic peroxyl radicals". Connect to online resource, 2007. http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:3284492.
Pełny tekst źródłaMeyer, Jens. "Transparent organic light emitting diodes for active matrix displays". Göttingen Cuvillier, 2008. http://d-nb.info/994852428/04.
Pełny tekst źródłaLisuwandi, Eko T. 1977. "Feedback circuit for organic LED active-matrix display drivers". Thesis, Massachusetts Institute of Technology, 2002. http://hdl.handle.net/1721.1/16849.
Pełny tekst źródłaIncludes bibliographical references (leaves 44-45).
This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.
A feedback circuit for an Organic Light Emitting Diode (OLED) based display is proposed and demonstrated. An OLED-based flat panel display is brighter, much lower power, has no viewing angle limitation and potentially cheaper compared to available Liquid Crystal (LC) based displays. Despite these advantages, an OLED-based display is not widely commercialized mainly due to its short practical lifetime. The I-V characteristics of the individual OLED pixels vary over time, temperature and processing-dependent parameters. Moreover, the variation is not uniform across an array of OLED pixels, causing OLED based displays to lose brightness accuracy after a few thousand hours of operation. The proposed feedback circuit is used to compensate for the non-uniformities in the individual OLED characteristics. The resulting display leverages the beneficial aspects of OLED display technology, while maintaining pixel uniformity and grayscale reproducibility. A demonstration system is built proving the feasibility of a flat panel display using direct optical feedback. The feedback loop monitors the output light level using a sensor and adjusts the current fed to the pixels to set the output light power to a digitally set reference level. The system shares a single feedback loop among a number of pixels, saving power and real estate. The demonstration system consists of a 5x5 array of LEDs, a CMOS camera, analog pixel circuitry, driver and feedback loop, as well as a digital controller. The demonstration system also shows the feasibility of time-sharing a feedback loop among a number of output devices.
by Eko T. Lisuwandi.
M.Eng.
Abraham, C. J. "Trace-element analysis of metallic and organic matrix materials exploiting RIMS". Thesis, Swansea University, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.635842.
Pełny tekst źródłaShahid, Salman. "Polymer-Metal Organic Frameworks (MOFs) Mixed Matrix Membranes For Gas Separation Applications". Thesis, Montpellier, 2015. http://www.theses.fr/2015MONTS141/document.
Pełny tekst źródłaThe plasticization behavior of pure polymers is well studied in literature. However, there are only few studies on the plasticization behavior of mixed matrix membranes. In Chapter 2 of this thesis, pure and mixed gas plasticization behavior of MMMs prepared from mesoporous Fe(BTC) nanoparticles and the polymer Matrimid® is investigated. All experiments were carried with solution casted dense membranes. Mesoporous Fe(BTC) MOF particles showed reasonably good compatibility with the polymer. Incorporation of Fe(BTC) in Matrimid® resulted in membranes with increased permeability and selectivity. At low pressures of 5 bar the MMMs showed an increase of 60 % in CO2 permeability and a corresponding increase of 29 % in ideal selectivity over pure Matrimid® membranes. It was observed that the presence of Fe(BTC) particles increases the plasticization pressure of Matrimid® based MMMs. Furthermore, this pressure increases more with increasing MOF loading. This delay in plasticization is attributed to the reduced mobility of the polymer chains in the vicinity of the Fe(BTC) particles. Also, at higher Fe(BTC) loadings, the membranes showed more or less constant selectivity over the whole pressure range investigated. Chapter 3 subsequently presented the preparation and plasticization behavior of MMMs based on three distinctively different MOFs (MIL-53(Al) (breathing MOF), ZIF-8 (flexible MOF) and Cu3(BTC)2 (rigid MOF)) dispersed in Matrimid®. The ideal and mixed gas performance of the prepared MMMs was determined and the effect of MOF structure on the plasticization behavior of MMMs was investigated. Among the three MOF-MMMs, membranes based on Cu3(BTC)2 showed highest selectivity while ZIF-8 based membranes showed highest permeability. The respective increase in performance of the MMMs is very much dependent on the MOF crystal structure and its interactions with CO2 molecules. Chapter 4 described the preparation of Matrimid® polyimide (PI)/polysulfone (PSF)-blend membranes containing ZIF-8 particles for high pressure gas separation. An optimized PI/PSF blend ratio (3:1) was used and performance and stability of PI/PSF mixed matrix membranes filled with different concentrations of ZIF-8 were investigated. PI and PSF were miscible and provided good compatibility with the ZIF-8 particles, even at high loadings. The PI/PSF-ZIF-8 MMMs showed significant enhancement in CO2 permeability with increased ZIF-8 loading, which was attributed to a moderate increase in sorption capacity and faster diffusion through the ZIF-8 particles. In pure gas measurements, pure PI/PSF blend (3:1) membranes showed a plasticization pressure of ~18 bar while the ZIF-8 MMMs showed a higher plasticization pressures of ~25 bar. Mixed gas measurements of PI/PSF-ZIF-8 MMMs showed suppression of plasticization as confirmed by a constant mixed gas CH4 permeability and a nearly constant selectivity with pressure but the effect was stronger at high ZIF-8 loadings. Gas separation results of the prepared PI/PSF-ZIF-8 MMMs show an increased commercial viability of Matrimid® based membranes and broadened their applicability, especially for high-pressure CO2 gas separations. In Chapter 5, a novel route for the preparation of mixed matrix membranes via a particle fusion approach was introduced. Surface modification of the polymer with 1-(3-aminopropyl)-imidazole led to an excellent ZIF-8-Matrimid® interfacial compatibility. It was possible to successfully prepare MMMs with MOF loadings as high as 30 wt.% without any non-selective defects. Upon increasing the ZIF-8 loading, MMMs showed significantly better performance in the separation of CO2/CH4 mixtures as compared to the native polymer. The CO2 permeability increased up to 200 % combined with a 65 % increase in CO2/CH4 selectivity, compared to the native Matrimid®. Chapter 6 finally discussed the conclusions and directions for future research based on the findings presented in this thesis
Ameye, Laurent. "Control of biomineralization in echinoderms :ultrastructure and cytochemistry of the organic matrix". Doctoral thesis, Universite Libre de Bruxelles, 1999. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/211943.
Pełny tekst źródłaUde, Mba. "Supercritical fluid extraction of organic species through polymeric systems". Thesis, Imperial College London, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.314376.
Pełny tekst źródłaFranks, Jeff. "Sample introduction into ICP-MS systems". Thesis, University of Hull, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.262437.
Pełny tekst źródłaXie, Wanqin Ph D. Massachusetts Institute of Technology. "Free approximation of transport properties in organic system using Stochastic Random Matrix Theory". Thesis, Massachusetts Institute of Technology, 2014. http://hdl.handle.net/1721.1/93040.
Pełny tekst źródłaCataloged from PDF version of thesis.
Includes bibliographical references (pages 44-48).
The proposed research is a study and application of Stochastic analysis- Random Matrix Theory(RMT) to fast calculate the transport properties of large static systems with relatively large disorder in mesoscopic size. As a major topic of Random Matrix Theory(RMT), free convolution managed to approximate the distribution of eigenvalues in an Anderson Model.So the next step is trying to expand RMT to approximate other quantities, such as transmission probability, conductivity and etc. Due to the eigenvectors' shifts, RMT works well only for small disorder. System with larger disorder requires to take in account of the changes in eigenvectors directly or through other approximations of the eigenvectors.
by Wanqin Xie.
S.M.
Keller, Christopher. "Photolysis of 1-(4-azidomethyl-phenyl)-ethanone and matrix/LFP studies of 2-benzoyl-3-methyl-2H-azirine". University of Cincinnati / OhioLINK, 2005. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1121442210.
Pełny tekst źródłaSilva, Vitor Paulo Andrade da. "Application of solid-phase microextraction technique to the determination of pesticides and evaluation of matrix effect on water". Universidade Federal do CearÃ, 2013. http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=16812.
Pełny tekst źródłaThis paper investigates a strategy as a quality control parameter, using standard surrogate and determination of an relation factor (Rf) for determination of pesticides parathion-methyl, chlorpyrifos and cypermethrin in aqueous environmental matrices with different characteristics: river water, estuarine, seawater and weir, using technique SPME-GC-FID. Pesticides were susceptible to matrix effects promoted by environmental samples. A decrease in recovery was observed for the pesticide while the complexity of the aqueous matrix tends to increase. The salinity and organic matter appear to be major sources of interference in the method. To the methyl-parathion, the matrix effect was more pronounced for samples with higher salt concentrations. For chlorpyrifos, in medium and high levels, the Rf value for estuarine matrices, marine and weir were statistically similar. For cypermethrin, statistical equality occurred in estuarine headquarters in medium and high levels of concentration. This indicates proportional behavior between the pesticide and the standard surrogate, suggesting that a single value of Rf can be used as a correction factor for any of these matrices used.
Este trabalho investiga uma estratÃgia como parÃmetro de controle de qualidade, usando padrÃo surrogate e determinaÃÃo de um fator de relaÃÃo (Rf) para a determinaÃÃo dos pesticidas metil-paration, clorpirifÃs e cipermetrina em matrizes ambientais aquosas com distintas caracterÃsticas: Ãgua de rio, estuÃrio, marinha e de aÃude; usando a tÃcnica de SPME-GC-FID. Os pesticidas foram suscetÃveis ao efeito matriz promovido pelas amostras ambientais. Observou-se que esse efeito tendeu a aumentar com o aumento da complexidade da matriz. A salinidade e a matÃria orgÃnica parecem ter sido as principais fontes de interferÃncia no mÃtodo. Para o metil-paration, as amostras com maiores teores salinos exerceram efeito matriz mais pronunciado. Para o clorpirifÃs, em nÃveis mÃdio e alto, o valor de Rf para matrizes estuarina, marinha e de aÃude foram estatisticamente similares. Para a cipermetrina, a igualdade estatÃstica ocorreu em matrizes estuarinas em nÃveis mÃdios e altos de concentraÃÃo. Isso indica comportamento proporcional entre o pesticida e o padrÃo surrogate, sugerindo que um Ãnico valor de Rf pode ser usado como fator de correÃÃo para qualquer uma dessas matrizes utilizadas.
Chafin, Raymond William II. "Torlon® and Silicalite Mixed Matrix Membranes for Xylene Isomer Purification". Diss., Georgia Institute of Technology, 2007. http://hdl.handle.net/1853/14562.
Pełny tekst źródłaNolan, Michelle Louise. "Proteins of the organic matrix of dentine and calcium transport in MDPC-23 cells". Thesis, University of Liverpool, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.510965.
Pełny tekst źródłaChen, Li. "Speciation of uranium and organic compounds on solid matrix studied by supercritical fluid extraction". FIU Digital Commons, 1996. http://digitalcommons.fiu.edu/etd/2137.
Pełny tekst źródłaAyres, Neil. "The polymerisation of vinyl monomers via transition metal mediated living radical polymerisation from an insoluble cross-linked polymer matrix". Thesis, University of Warwick, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.250975.
Pełny tekst źródłaKadam, Pritam Eknath [Verfasser], Wolfram [Gutachter] Sander i Gerald [Gutachter] Dyker. "Matrix isolation of highly reactive organic intermediates / Pritam Eknath Kadam ; Gutachter: Wolfram Sander, Gerald Dyker". Bochum : Ruhr-Universität Bochum, 2017. http://d-nb.info/1138835412/34.
Pełny tekst źródłaKhdhayyer, Muhanned. "Mixed matrix membranes comprising metal organic frameworks and high free volume polymers for gas separations". Thesis, University of Manchester, 2017. https://www.research.manchester.ac.uk/portal/en/theses/mixed-matrix-membranes-comprising-metal-organic-frameworks-and-high-free-volume-polymers-for-gas-separations(172f6a4f-a531-44ae-979c-bbbd170f33db).html.
Pełny tekst źródłaKhan, Mohd Yahya. "Identification and Correlation of Disinfection Byproducts and Total Organic Halogen Precursors in a Biofilm Matrix". University of Toledo / OhioLINK, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=toledo1404662994.
Pełny tekst źródłaNayak, Nayan Nagesh. "Development of mixed matrix membranes with metal - organic framework and ionic liquids for biogas upgrading". Master's thesis, Faculdade de Ciências e Tecnologia, 2013. http://hdl.handle.net/10362/10419.
Pełny tekst źródłaThe EM3E Master is an Education Programme supported by the European Commission, the European Membrane Society (EMS), the European Membrane House (EMH), and a large international network of industrial companies, research centers and universities
Abood, Ahmed T. "Source Apportionment Analysis of Measured Volatile Organic Compounds in Corpus Christi, Texas". Thesis, University of North Texas, 2014. https://digital.library.unt.edu/ark:/67531/metadc500059/.
Pełny tekst źródłaau, jeremy shaw@uwa edu, i Jeremy Shaw. "Biomineralisation processes in the radula teeth of the chiton Acanthopleura hirtosa (Mollusca: Polyplacophora)". Murdoch University, 2007. http://wwwlib.murdoch.edu.au/adt/browse/view/adt-MU20080703.163505.
Pełny tekst źródłaBenzaqui, Marvin. "Synthesis of Metal-Organic Framework nanoparticles and mixed-matrix membrane preparation for gas separation and CO2 capture". Thesis, Université Paris-Saclay (ComUE), 2017. http://www.theses.fr/2017SACLV075/document.
Pełny tekst źródłaCO2 capture and storage (CCS) is of high economical and societal interest. CO2/N2 andH2/CO2 separations are able to limit atmospheric CO2 emissions produced by industrial exhausts andmembranes present numerous economical and practical advantages. Polymer membranes are easy toprocess and possess interesting mechanical properties. However, there is a trade-off to make betweenpermeability and selectivity. Mixed-matrix membranes (MMM) based on MOFs (porous crystallinehybrid materials) have been proposed to boost the performances of polymer membranes for CO2capture. In comparison to other inorganic porous materials, one may expect that the compatibilitybetween MOFs and polymers is enhanced due to the hybrid character of MOFs.In this work, porous water stable polycarboxylate MOFs based on Fe3+ and Al3+ with promisingproperties for CO2 adsorption were synthesized for large-scale production using water as the mainsolvent. Two new porous polycarboxylate Fe3+ MOF bearing free -COOH groups in the frameworkwere obtained at room temperature as nanoparticles. The crystallographic structure of one of thesematerials was determined by single crystal X-ray diffraction. A second part of the thesis was devotedto the synthesis of MOFs nanoparticles with good yield. We focused our attention on the control of thediameter and morphology of MIL-96(Al) nanoparticles. This study led to the preparation of MMMsbased on MIL-96(Al) with promising properties for CO2/N2 separation. Finally, the compatibilitybetween MOF particles and polymers was studied for two systems (ZIF-8/PIM-1 and ZIF-8/PVOH),showing the influence of the surface chemistry of MOFs and the physico-chemical properties ofpolymer on the matching between MOFs and polymers
Ghanizadeh, Amin [Verfasser]. "Experimental study of fluid transport processes in the matrix system of organic-rich shales / Amin Ghanizadeh". Aachen : Hochschulbibliothek der Rheinisch-Westfälischen Technischen Hochschule Aachen, 2014. http://d-nb.info/1048647072/34.
Pełny tekst źródłaBrown, Denise Marie Pfaender Frederic K. "Pyrene availability as determined by the interactions of natural organic matter with the soil mineral matrix". Chapel Hill, N.C. : University of North Carolina at Chapel Hill, 2006. http://dc.lib.unc.edu/u?/etd,686.
Pełny tekst źródłaTitle from electronic title page (viewed Oct. 10, 2007). "... in partial fulfillment of the requirements for the degree of Doctor of Philosophy in the Department of Environmental Sciences and Engineering, School of Public Health." Discipline: Environmental Sciences and Engineering; Department/School: Public Health.
Streiter, Martin [Verfasser], Carsten [Akademischer Betreuer] Deibel, Carsten [Gutachter] Deibel i Georgeta [Gutachter] Salvan. "Chromophore-Matrix Interaction in Organic Semiconductors / Martin Streiter ; Gutachter: Carsten Deibel, Georgeta Salvan ; Betreuer: Carsten Deibel". Chemnitz : Technische Universität Chemnitz, 2020. http://d-nb.info/121991018X/34.
Pełny tekst źródłaCastro, Gutierrez Natalia. "Incorporation and release of organic volatile compounds in a bio-based matrix by twin-screw extrusion". Phd thesis, Toulouse, INPT, 2016. http://oatao.univ-toulouse.fr/16006/1/Castro_Natalia.pdf.
Pełny tekst źródłaZhang, Xiaoming. "Explore the Formation of Triplet Nitrene - A Potential Intermediate for Building Organic Magnets". University of Cincinnati / OhioLINK, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1353156258.
Pełny tekst źródłaGabrion, Xavier. "Contributions à la caractérisation d'un matériau composite thermoplastique thermostable : Application à des structures cylindriques sous sollicitations multiaxiales". Thesis, Besançon, 2014. http://www.theses.fr/2014BESA2012.
Pełny tekst źródłaThe objective of this thesis work, in partnership with ALSTOM Company, is to contribute to the writing of design rules in order to qualify and certify annular structures made of thermostable thermoplastic matrix composite reinforced by carbon fibre. These structures are used in rotating machines for embedded applications.This work proposes an innovative methodology to achieve this goal. It consists in reproducing, at the scale of a laboratory specimen, the multiaxial stress and damage states to which the industrial structure is subjected in-service byoptimizing a tensile test on annular notched specimen. More conventional multiaxial tests, based on internal pressureand tensile loading are particularly unsafe and difficult to be performedwhen implemented at elevated temperature.After the optimisation of the ring configuration by numerical simulation, experimental tests were performed to validatethe appearance of the expected damage under loading. Damage was characterized using non-destructive techniques suchas acoustic emission and infrared thermography. The cyclic tests achieved using this configuration showed high fatiguestrength of this material, in particular for a ratio R of 0.5 (equivalent to thein-service ratio). The results also highlight thegreat remaining strength and rigidity of these structures, even after a large number of cycles
Svora, Petr. "Studium chování kompozitních profilů s polymerní matricí a dlouhovláknovou anorganickou výztuží". Doctoral thesis, Vysoké učení technické v Brně. Fakulta stavební, 2013. http://www.nusl.cz/ntk/nusl-233788.
Pełny tekst źródłaDuca, Clara. "Effect of water matrix on Vacuum UV process for the removal of organic micropollutants in surface water". Thesis, University of British Columbia, 2015. http://hdl.handle.net/2429/52252.
Pełny tekst źródłaApplied Science, Faculty of
Chemical and Biological Engineering, Department of
Graduate
Foti, Federico. "Effect of the Environment on the Fatigue Behaviour of Textile Organic Matrix Composite Materials for Aircraft Applications". Thesis, Chasseneuil-du-Poitou, Ecole nationale supérieure de mécanique et d'aérotechnique, 2017. http://www.theses.fr/2017ESMA0031/document.
Pełny tekst źródłaIn the next future, the employment of organic matrix/carbon fibre composites (OMC) is foreseen for the realization of “hot” structures: these parts may be subjected, in service, to mechanical fatigue (e.g. fan blades turbo-engines), thermal cycling and thermo-mechanical fatigue (e.g. aircraft structural parts). Though there is a consistent literature concerning the fatigue behaviour of woven composites, the interaction between fatigue and environmental degradation at high temperature has been poorly explored. Coupling between thermo-oxidation effects, mechanical (viscoelastic, viscoplastic) behaviour of the polymer matrix at high temperatures and degradation due to fatigue may be highly detrimental for the material. This work aims at characterizing and modelling - for carbon fibre/organic matrix (polyimide) textile composites – the thermomechanical behaviour, the onset and the development of damage related to cyclic mechanical mechanisms (fatigue) under controlled (temperature and gas) environment.A preliminary study on a cross-ply laminate [02/902]s has been carried out in order to analyse the environmental effect on a model sample. Digital Image Correlation (DIC) and μ-Computed Tomography (μCT) have been used to monitor and characterize the fatigue damage of 2D woven composites for aeronautical applications. The environmental effect on fatigue degradation have been also explored.The long-term aim of the study is to provide experimental and numerical tools to strengthen the understanding and the modelling of mechanics/damage/environment coupling for durability prediction
Adams, Ryan Thomas. "High molecular sieve loading mixed matrix membranes for gas separations". Diss., Georgia Institute of Technology, 2010. http://hdl.handle.net/1853/39470.
Pełny tekst źródłaWest, Kaydee Jo. "Optimizing Methods for Extraction of Organic Compounds from Molluscan Shells". Scholar Commons, 2016. http://scholarcommons.usf.edu/etd/6430.
Pełny tekst źródłaBushell, Alexandra. "Mixed matrix membranes of a polymer of intrinsic microporosity with crystalline porous solids". Thesis, University of Manchester, 2012. https://www.research.manchester.ac.uk/portal/en/theses/mixed-matrix-membranes-of-a-polymer-of-intrinsic-microporosity-with-crystalline-porous-solids(6166d350-d969-49bc-8108-1c9afcaaa2f9).html.
Pełny tekst źródłaValle, Brent. "Design of Multilayer Optical Media: Organic Photovoltaics and Optical Data Storage". Case Western Reserve University School of Graduate Studies / OhioLINK, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=case1364917393.
Pełny tekst źródłaGalvis, Leonardo [Verfasser], i Claudia [Akademischer Betreuer] Fleck. "Raman spectroscopy investigation of organic matrix orientation and chemistry changes during fracture healing / Leonardo Galvis. Betreuer: Claudia Fleck". Berlin : Universitätsbibliothek der Technischen Universität Berlin, 2012. http://d-nb.info/1023762293/34.
Pełny tekst źródłaLinck, Nicholas W. "MIXED MATRIX FLAT SHEET AND HOLLOW FIBER MEMBRANES FOR GAS SEPARATION APPLICATIONS". UKnowledge, 2018. https://uknowledge.uky.edu/cme_etds/89.
Pełny tekst źródłaHoops, Michael Dean. "Matrix Isolation Studies of Photochemical and Thermal Reactions of Cyclic Organic Substrates with Chromyl Chloride and Ozone/O Atoms". University of Cincinnati / OhioLINK, 2008. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1211558149.
Pełny tekst źródłaLevichkova, Marieta. "Influence of the Matrix Environment on the Optical Properties of Incorporated Dye Molecules". Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2008. http://nbn-resolving.de/urn:nbn:de:bsz:14-ds-1205766500301-30732.
Pełny tekst źródłaGawlitza, Kornelia [Verfasser], i Regine von [Akademischer Betreuer] Klitzing. "P-NIPAM microgels as stimuli responsive matrix for embedding functional inorganic and organic particles / Kornelia Gawlitza. Betreuer: Regine von Klitzing". Berlin : Universitätsbibliothek der Technischen Universität Berlin, 2012. http://d-nb.info/1029355584/34.
Pełny tekst źródłaTessema, Tsemre. "PREPARATION AND EVALUATION TECHNIQUES OF POROUS MATERIALS AND MIXED MATRIX MEMBRANES FOR TARGETED CO2 SEPARATION APPLICATIONS". VCU Scholars Compass, 2017. http://scholarscompass.vcu.edu/etd/5044.
Pełny tekst źródłaThenna, Hewa Kosala R. S. "Applications Focused Synthetic Modification on Photoremovable Protecting Groups (PRPG) & Photochemical Analysis on Organic Azides and Isoxazoles". University of Cincinnati / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1511858669354976.
Pełny tekst źródłaLevichkova, Marieta. "Influence of the Matrix Environment on the Optical Properties of Incorporated Dye Molecules". Doctoral thesis, Technische Universität Dresden, 2007. https://tud.qucosa.de/id/qucosa%3A24056.
Pełny tekst źródłaGonçalves, Flavia. "Fatores relacionados ao desenvolvimento de tensões de polimerização em compósitos experimentais contendo BisGMA, TEGDMA e BisEMA". Universidade de São Paulo, 2007. http://www.teses.usp.br/teses/disponiveis/23/23140/tde-13082007-154602/.
Pełny tekst źródłaObjective: To evaluate the influence of BisGMA, TEGDMA and TEGDMA content on polymerization stress (spol), degree of conversion (DC), volumetric shrinkage (VS), elastic modulus (E), flow, maximum polymerization rate (RPmax) and maximum stress rate (RSmax) and to establish the correlation between polymerization stress and the other variables. Materials and Methods: Nine resin mixtures were studied, varying the BisGMA molar concentration (33, 50 or 66%) and the co-monomer content (TEGDMA, BisEMA or both in equal parts). All blends received 40 wt % of colloidal silica. spol was determined by inserting the composite (h=1mm) between acrylic rods (r=3mm) fixed on the opposite ends of a universal testing machine, and dividing the maximum contraction force by the rods? cross section. VS was measured by mercury dilatometry. E was obtained by three-point bending test. Fragments of flexural specimens were used to analyze DC by FT-Raman. Flow was obtained applying load of 20N for 60s on the uncured composite. RPmax was determined by differential scanning calorimetry (DSC). RSmax was calculated by the difference between two consecutives spol values. Data were submitted to two-way ANOVA, Tukey´s test (a=0.05%) and regression analyses. Results: The interactions between factors were significant for all variables (p<0.01), except for DC, where only the main factors were significant (p<0.001). In general, composites with higher BisGMA concentration and those containing BisEMA showed lower DC and flow, which resulted in lower values of spol, VS and E. RPmax was similar for all groups, except for the 66%TEGDMA composite, which showed a statistically lower value. However, this group showed the highest value of RSmax. The regression analyses evidenced a strong direct dependence of spol to DC (R2=0.830), flow (R2=0.896), VS (R2=0.690) and RSmax (R2=0.900). The correlation with E was weak (R2=0.404) and with RPmax was negative (R2=0.667). Conclusion: For the monomer mixtures studied, composites with BisEMA and those with higher BisGMA concentration showed, in general, lower spol, DC, VS, flow and E. RPmax was almost insensitive to the organic matrix composition. spol showed stronger dependence with DC, VS and flow.
Andersson, Peter. "Charge Transport Modulation and Optical Absorption Switching in Organic Electronic Devices". Doctoral thesis, Norrköping : Department of Science and Technology, Linköping University, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-10271.
Pełny tekst źródłaSrivastava, Deepchandra. "Improving the discrimination of primary and secondary sources of organic aerosol : use of molecular markers and different approaches". Thesis, Bordeaux, 2018. http://www.theses.fr/2018BORD0055/document.
Pełny tekst źródłaOrganic aerosols (OAs), originating from a wide variety of sources and atmospheric processes, have strong impacts on air quality and climate change. The present PhD thesis aimed to get a better understanding of OA origins using specific organic molecular markers together with their input into source-receptor model such as positive matrix factorization (PMF). This experimental work was based on two field campaigns, conducted in Grenoble (urban site) over the 2013 year and in the Paris region (suburban site of SIRTA, 25 km southwest of Paris) during an intense PM pollution event in March 2015. Following an extended chemical characterization (from 139 to 216 species quantified), the use of key primary and secondary organic molecular markers within the standard filter-based PMF model allowed to deconvolve 9 and 11 PM10 sources (Grenoble and SIRTA, respectively). These included common ones (biomass burning, traffic, dust, sea salt, secondary inorganics and nitrate), as well as uncommon resolved sources such as primary biogenic OA (fungal spores and plant debris), biogenic secondary AO (SOA) (marine, isoprene oxidation) and anthropogenic SOA (polycyclic aromatic hydrocarbons (PAHs) and/or phenolic compounds oxidation). In addition, high time-resolution filter dataset (4h-timebase) available for the Paris region also illustrated a better understanding of the diurnal profiles and the involved chemical processes. These results could be compared to outputs from other measurement techniques (online ACSM (aerosol chemical speciation monitor), offline AMS (aerosol mass spectrometer) analyses), and/or to other data treatment methodologies (EC (elemental carbon) tracer method and SOA tracer method). A good agreement was obtained between all the methods in terms of separation between primary and secondary OA fractions. Nevertheless, and whatever the method used, still about half of the SOA mass was not fully described. Therefore, a novel OA source apportionment approach has finally been developed by combining online (ACSM) and offline (organic molecular markers) measurements and using a time synchronization script. This combined PMF analysis was performed on the unified matrix. It revealed 10 OA factors, including 4 different biomass burning-related chemical profiles. Compared to conventional approaches, this new methodology provided a more comprehensive description of the atmospheric processes related to the different OA sources
Streiter, Martin. "Chromophore-Matrix Interaction in Organic Semiconductors". 2020. https://monarch.qucosa.de/id/qucosa%3A71581.
Pełny tekst źródłaVieira, André Alves. "Erbium laser efects on the dentin organic matrix". Dissertação, 2020. https://hdl.handle.net/10216/127967.
Pełny tekst źródłaVieira, André Alves. "Erbium laser efects on the dentin organic matrix". Master's thesis, 2020. https://hdl.handle.net/10216/127967.
Pełny tekst źródłaWang, Mei-sheue, i 王美雪. "Modeling the Transport of Organic Compounds in Heterogeneous Soil Matrix". Thesis, 2007. http://ndltd.ncl.edu.tw/handle/78772989560978276920.
Pełny tekst źródła臺灣大學
環境工程學研究所
95
ABSTRACT Heterogeneous unsaturated soil layers comprise both mobile and immobile regions as characterized by different flow velocities of fluid. The movement of pollutants is governed by advection and dispersion in mobile regions, and by diffusive mass transfer between mobile and immobile regions. In this study, the aim is to estimate the distribution of the first-order exchange rate coefficients that reveals the presence of soil-matrix heterogeneity, and to develop an advection-diffusion mass transport model that includes the distributed first-order exchange coefficients in unsaturated soils. The study also simulate the experimental results from laboratory soil columns and a soil-vapor-extraction (SVE) field site by using different organic compounds as tracers and under different test conditions. Modeling analyses and experimental results indicate that the including a log-normal distributed or a gamma distributed first-order exchange rate coefficient could explain the organic compounds transport in the vadose zone. Experimental results and model simulation could explain that the tailing phenomenon in chemical breakthrough curves, which signifies a non-equilibrium transport, resulting mainly from a rate-limiting exchange into and out of immobile (stagnant) regions. Model simulation could also explain the rebounding phenomenon and fit the data well by only adjusting the volume fraction of the immobile regions, the averaged radius of the aggregates and the standard deviation of the logarithmic first-order exchange rate coefficient. The problem of the lack of local geological information while modeling chemical transfer in immobile regions can be solved by using a set of first-order exchange rate coefficients in log-normal or gamma distribution, in which the related parameters are functions of the system length scale, the soil moisture content, and the chemical partition coefficient. Among these properties the system length scale is found the most important site-specific property. The findings from this study enable one to better predict the transport of trace pollutants in a heterogeneous vadose zone based on the properties of chemicals and the soil system. The model will be able to predict the organic compounds moving and distribution situation in soil and groundwater. Also the model will be able to assist the designing of the SVE system and operational strategy, and the prediction of the performance of the clean-up actions.