Global ETD Search
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 768 for “"qPCR"”.
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DYNAMICS OF MICROCYSTIS-INFECTING CYANOPHAGES IN TROPICAL FRESHWATERS THROUGH QPCR AND NEXT GENERATION SEQUENCING
Cyanophages (i.e. viruses that infect cyanobacteria) are crucial in regulating the abundance of their host cells, affecting the clonal diversity as well as the composition of the cyanobacterial community. This thesis focuses on two environmental water studies based on short- (72-hour diel cycle) …
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Investigating the distribution, seasonal dynamics and toxicity of Azadinium spinosum in Scottish waters using qPCR
… realtime<br/>polymerase chain reaction (qPCR) is discussed in detail and documents its first use in Scottish waters to survey A. spinosum abundance and seasonality. The limit of detection of the method was found to be 2000 ±5600 cells L-1, however it is unclear whether this is adequate …
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Assessment of Microbial Biodegradation of Mixed Soil Contaminants at the Santa Susan Field Laboratory Using TRFLP, qPCR, and Culturing
… (TRFLP), quantitative polymerase chain reaction (qPCR), and traditional culturing techniques combined with sequencing of the 16S or ITS regions of the cultured bacteria and fungi. Soil was collected from the Santa Susana Field Laboratory (SSFL), which was the site of numerous liquid-propulsion …
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Effects of Heterodera Glycines Population Densities on Fusarium Solani F. Sp. Glycines Colonization of Soybean Roots and Development of Sudden Death Syndrome
… quantification with real-time quantitative PCR (QPCR), to estimate fungal colonization of soybean roots. QPCR was more sensitive than the plating bioassays at detecting the fungus: Fsg DNA was detected in 371 out of 372 root samples with QPCR, while CFU were only detected in 14.5% of the samples …
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Evaluation of a Paratuberculosis Quantitative Polymerase Chain Reaction Assay with Microscopic Correlation
… quantitative polymerase chain reaction (qPCR) assay and had a sensitivity of 92%. To determine assay specificity, 21 FFPE tissues from animals without gastrointestinal disease combined with 13 FFPE tissues from non-ruminant animals (frog, dove, turtle, dog, and 2 cats) with …
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Accelerated Sepsis Diagnosis by Seamless Integration of Nucleic Acid Purification and Detection
… diagnostic information. Although the present qPCR-based test is more specific than biomarker detection and faster than culturing, its 6 ~ 10 hr turnaround remains suboptimal relative to the 7.6%/hr rapid deterioration of the survival rate, and the 3 hr hands-on time is labor-intensive. To …
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NLRP2 expressziójának vizsgálata különböző immortalizált sejtvonalakon
… A kezelt sejtekből RNS-t izoláltunk, majd RT-qPCR segítségével meghatároztuk az NLRP2 relatív expresszióját. Az eredményeket ciklofilinnel normalizáltuk. A vizsgált sejtvonalak közül a THP-1, K562, Caco2 és A549 sejteken detektáltuk az NLRP2 jelenlétét, viszont az NLRP2 expresszióját …
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Development and clinical performance of nucleic acid amplification techniques for the diagnosis of Strongyloides stercoralis
… for this study were a published real- time PCR (qPCR) assay (ten Hove et al., 2009) and a novel LAMP assay. The NAATs were compared to the combined reference standard of microscopy, culture and serology for the diagnosis of S. stercoralis in stool samples. The development of the novel LAMP assay …
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Repair of DNA-protein crosslinks in mammalian cells
… polymerase chain reaction (SSPE-qPCR) used to study the repair of DNA-protein crosslinks in mammalian cells. DNA-protein crosslinks (DPCs) are bulky lesions which disrupt important cell processes such as transcription and replication. They are formed by endogenous molecules such …
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Evaluations of Diagnostic Tests for Undifferentiated Febrile Illness on the Thailand-Myanmar (Burma) Border
… IgM ICT and 47kDa quantitative real-time PCR (qPCR) for scrub typhus and 17kDa qPCR for murine typhus were evaluated using acute plasma specimens for the IgM ICT and acute buffy coat specimens for the qPCRs. Sensitivities of the IgM ICT, 47kDa qPCR and 17kDa qPCR were 27.3% (95% CI 15.0-42.8), …
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Expression levels of non-autonomous retrotransposons in germ-line rodent tissues
… mobility and vertical transmission. RT-PCR and qPCR results suggested higher expression of both SINE and LINE elements in germ-line tissues over somatic. Additionally, the qPCR findings demonstrated higher expression of the IDL element by at least one order of magnitude than the guinea pig ID or …
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Determination of soybean cultivar resistance to soybean cyst nematode with quantitative polymerase chain reaction
… quantitative Polymerase Chain Reaction (qPCR), a prelude to differentiation of resistance levels in soybean cultivars. Two experiments were conducted. In the first one, a consistent inoculation method was developed using to provide active second-stage juveniles (J2). Two-day-old soybean …
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Tongue dorsum swab processing for the detection of tuberculosis with Cepheid Xpert® MTB/RIF Ultra
… from studies that used manual quantitative PCR (qPCR) to analyze swabs. Studies using the automated Cepheid Xpert® MTB/RIF Ultra qPCR test (Xpert Ultra) to analyze tongue swabs have yielded more modest results. Using tongue swabs collected from TB-negative volunteers and spiked with cultured MTB …
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An experimental investigation into the mechanisms of bacterial evolution
… the quantitative polymerase chain reaction (qPCR) to provide real-time enumeration of genetic marker abundance within bacterial populations. Second, I will focus on horizontal gene transfer in <em>E. coli</em> occurring through a process called conjugation. By fitting the qPCR data to a …
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Microbial Source Tracking of Bacteroides to Identify Human and Bovine Fecal Loading in McDaniel Lake
… fecal sources. Using quantitative real-time PCR (qPCR), human-associated and bovine-associated Bacteroides DNA, as well as total Bacteroides DNA can be quantified and concentrations of fecal contamination in lakes and streams can be determined. Amplification control plasmids containing 16S rDNA …
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Development of molecular tools for rapid detection and quantification of indoor airborne molds to assess their impact on public health
… a specific ITS-based SYBR®green real-time PCR (qPCR) assay for Aspergillus versicolor, a species frequently observed in indoor air and known to be allergenic. Additionally, an ITS-based qPCR assay was developed for the specific detection of Exophiala jeanselmei, a pathogenic yeast suspected to …
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Optimization of automated immunomagnetic separation for the detection of escherichia coli 0157: H7 by quantitative polymerase chain reaction
… such as quantitative polymerase chain reaction (qPCR) assays have been developed, which are specific, quick and reliable. The major drawback of the technique is prior DNA extraction, which can be time consuming and result in partial loss of target material, followed by small sample input into the …
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Characterizing the epidemiology of ophidiomycosis in North American snakes through field studies, modeling, pathogen genomic analysis, and treatment trials
… to detect the presence of O. ophidiicola using qPCR. Each snake was assigned to an ophidiomycosis category based on the presence of skin lesions and O. ophidiicola. Logistic regression models were used to predict lesion presence, O. ophidiicola detection, and ophidiomycosis category based on …
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Development of a 16S rRNA gene sequence as a biomarker specific to the gastrointestinal tract and feces of swine based on suppressive subtractive hybridization
… primers were designed and tested in PCR and qPCR assays against swine and non-target DNA. Sequence A5, closely related to Prevotellaceae, was detected in all swine samples tested, as well as the environmental samples impacted by swine manure. The relationship between closely related 16S rRNA …
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The identification of biomarker differences between grade I and II meningiomas: Fibulin-2 is a novel biomarker for differentiating grade II from grade I meningiomas
… (WB) and quantitative polymerase chain reaction (qPCR) in primary cells; via WB, immunohistochemistry and qPCR in tissue; and in plasma, via enzyme-linked immunosorbent assay (ELISA). Results: I identified 3554 proteins commonly expressed in both meningioma grades. Further analysis revealed that …
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