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Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 102 for “"PPV"”.
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Investigating self-assembly of linked oligomeric PPV-based materials
… effect of synthetic structure of the oligomeric PPV-based materials was investigated to understand the effect of conjugation length, role of hydrogen bonding side chains, and influence of regioregularity on controlling chromophore folding. By studying alkoxy-linked and alkyl-linked …
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Some aspects of nasal disease in the cat
… of neoplasia. The positive predictive values (PPV) were calculated for the diagnosis of each disease. The agreement between observers was also evaluated. The signs with higher PPV for nasal neoplasia were invasion of bony case (PPV=18.2%) and vomer destruction (PPV=86.6%). Generalized …
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Molecular composites of a conducting polymer: syntheses and characterization of poly(1,4-phenylenevinylene)-crown ether rotaxanes
… them. By using poly(1,4-phenylenevinylene) (PPV), one of the most promising conductive polymers, as the linear backbone and different sizes of crown ethers (42C14, 60C20) as macrocycles, molecular composites of the conducting polymer were generated To compare with the PPV rotaxanes, PPV was …
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Untersuchungen der genetischen Varianz aktueller Isolate des porzinen Parvovirus
… In 82 samples (15,8%) out of 28 farms (16,3%), PPV was diagnosed. In this study, we were able to show that rectal swabs are suitable substrates from which to detect porcine parvovirus in sows using a PCR analysis. In 12 out of 19 rectal swabs PPV genome was amplified. In one PPV-positive sample …
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Morphology Effects on the Optical Properties of Phenylene Vinylenes From Nano-Scale to Bulk
… poly-p-(phenylene vinylene) (PPV), and poly [(2-methoxy-5-hexyloxy p-phenylene)vinylene] (MH-PPV)). These molecules were examined as dilute solution, reprecipitated aggregates, and thin films. Spectroscopic measurements included UV/Vis absorption and fluorescence measurements, …
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Mechanistic Studies of the Structure-Photostability Relationship of Organic Conjugated Polymers
… (C8-diCN-PPV) and poly(2,5-bis(decyloxy)- 1,4-phenylene-1,2-dicyanovinylene) (RO-diCN-PPV). The second series included a wellknown polymer, poly(3-hexylthiophene) (P3HT), and a newly synthesized CP, Poly(3,5- …
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Calcium vapour deposition on semiconducting polymers studied by adsorption calorimetry and visible light absorption
… between calcium and three polymers: MEH-PPV, MEH-PPP and P3HT. All three polymers behave differently in their reaction kinetics with calcium. On MEH-PPV we measure 45 μJ/cm² of heat generated in excess of the heat of bulk metal growth, 120 μJ/cm² for MEH-PPP, and 100 μJ/cm² for P3HT. …
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Parapoxvirus: basi genomiche della patogenesi
Parapoxvirus (PPV) are member of a genus in the family poxviridae which currently encompasses four species: the prototype orf virus (OV), bovine papular stomatitis virus (BPSV), pseudocowpox virus (PCPV) and parapoxvirus of New Zealand red deer (PVNZ). PPVs cause widespread, but localized diseases …
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Parylene-based chemical vapor deposition of electroluminescent polymer films used in polymer light emitting diodes
… polymer poly(p-phenylene vinylene) (PPV) prepared by parylene-based chemical vapor deposition (CVD) are explored in this thesis. A reactor for CVD of PPV is designed and constructed, and both a,a'-dibromo p-xylene and a,a.'-dichloro p-xylene are tested as source monomers. By …
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Inter- und Intramolekulare Aggregatbildung in Poly(p-Phenylen-Vinylen): photophysikalische und elektrische Eigenschaften
… Homopolymers Poly(p-Phenylen-Vinylen) (PPV). Dieses ist selbst unlöslich und wird über die thermische Konversion eines leicht zu verarbeitenden Präkursorpolymers hergestellt. Seit etwas mehr als einem Jahrzehnt werden die chemischen und physikalischen Eigenschaften von PPV extensiv …
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Photophysics of Phenylene Vinylene Polymers and Oligomers: The Influence of Nanocrystalline Domains
… vinylene molecules. Poly-p-(phenylene vinylene) (PPV), poly[(2-methoxy-5-hexyloxy-p-phenylene)vinylene] (MH-PPV), and 1,4-distyrylbenzene (DSB), a small molecule analog of PPV, are studied using various spectroscopic techniques including absorption and emission spectroscopy, transient emission …
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Development of Rapid Lateral-flow Immunochromatographic Test for the Diagnosis of Chikungunya Virus Infection
… showed 90.0% sensitivity, 100% specificity, 100% PPV (positive predictive value) and 93.8% NPV (negative predictive value). The E1 ELISA showed 77.5% sensitivity, 100% specificity, 100% PPV and 87.0% NPV and the capsid ELISA showed 87.5% sensitivity, 100% specificity, 100% PPV and 92.3% NPV. The …
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Análisis de las interacciones de la proteína CI del virus de la sharka con proteínas de la planta
… la proteína CI del virus de la sharka (PPV) como cebo. Se identificaron dos proteínas (L1 y L2) que interaccionaban específicamente con la proteína CI de PPV. L1 es una proteína desconocida con un dominio de dedos de zinc de tipo HIT, y L2 es el precursor de la subunidad PSI-K del …
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Synthesis of Highly Ordered Polymer Nanostructures Based on Polyphenylene Vinylenes (PPVs)
Poly(phenylene vinylene)s (PPVs) are a prototypical class of CPs that has been well studied in terms of optical, electronic, and structural properties. To build off of this knowledge, a series of well-defined polychromophores with a backbone composed of alternating PPV oligomers (trimer, pentamer, …
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Optical spectroscopy of conjugated polymers.
… state of poly-(p-phenylenevinylene) (PPV) and photogenerated charged states within the porphyrins. Implantation of PPV films by high energy (30ke V) ions has been employed to introduce controlled damage into the film. Subsequently, studies of the absorption, fluorescence, photo-induced …
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Erhöhung der Sensitivität photorefraktiver holographischer Speichermedien auf Basis von amorphen organischen Materialien
… nieder-Tg Materialien. Komposite mit DBOP-PPV als Lochleiter Durch Ersetzen des PVK Polymers im Standardsystem durch das PPV-Ether Derivat DBOP-PPV gelang es, den Aufbau des Raumladungsfeldes zu beschleunigen. Dies ist auf die im Vergleich zu PVK höhere Lochmobilität des konjugierten …
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Evaluating The Nccn Clinical Criteria For Hereditary Breast and Ovarian Cancer Syndrome Genetic Testing
… to evaluate the positive predictive values (PPVs) of 14 individual criterion for predicting a <em>BRCA1/2</em> mutation. Two criteria had PPVs significantly below 10%. Only 2 of 115 patients recommended for testing based solely on the criterion of “diagnosed with breast cancer ≤45 years of …
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Role of simple biomarkers in predicting fibrosis progression in HCV infection
… APRI ) of 0.18 had 80%Positive Predictive Value( PPV) and 67 %Negative Predictive Value( NPV )in predicting progression of fibrosis . An analysis of ROC curve revealed that change in FIB-4 (delta Fib-4) of 0.39 had 75% PPV AND 75 % NPV for predicting progression of fibrosis.\r\n\r\n\r\n APRI and …
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