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 71 for “"LCMS"”.
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Development of an LCMS Analytical Method with Applicability to Determination of Trace Level Explosives in Environmental Waters
<p>Traces of explosives and their degradation products present in explosives contaminated sites from military sources, such as training facilities, impose a great concern over the public health and our eco-system. This work is centered around finding an efficient way to extraction of these …
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Global leadership: An Analysis of three Leadership Competency Models in Multinational Corporations
… examines extant leadership competency models (LCMs) in three multinational companies - selected from across Europe and the US – and attempts to understand how effectively these models translate across different regions and cultures. Such examination is based on semi-structured, in-depth …
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The removal of chlorophenoxy herbicides from drinking water by activated carbon adsorption and liquid core microcapsule perstraction
… by dibutyl sebacate liquid-core microcapsules (LCMs) was demonstrated. The use of LCMs results in between 9 and 18 % of the herbicides being extracted within 60 minutes of capsule addition. The quantity of LCMs added was equal to 1 g of oil core and could be increased to achieve higher levels of …
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Refining the evaluation of growth and the growth hormone/insulin-like growth factor-I axis in children
… liquid chromatography mass spectrometry (LCMS) to measure IGF concentrations; 3) exploring genetic causes of poor growth; and 4) studying the association between body composition and infant growth. Methods: These include: additional GH measurements during the GHST and fasting study; IGF-I …
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Estimation of the level and trend of adult motrality in Zambia
… and 2006 Living Conditions Monitoring Survey (LCMS) information on survivorship of parents to estimate probabilities of dying between ages 25 and 35 ( 10 25 q ); and 25 and 40 ( 15 25 q ) for females; and 35 and 45 ( 10 35 q ) for males; the siblinghood method using the 1996, 2001/2 and 2007 …
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Investigating the chemistry of lipoyl synthase
… carbon centre sulfur insertion first occurs. LCMS analysis of reactions using labeled substrates and proton NMR characterization of an isolated monothiolated adduct have been used to show that sulfur insertion proceeds in a stepwise manner, with sulfur insertion occurring preferentially at the …
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A systems approach to determine how Toxoplasma gondii Infection causes neuropsychiatric disease
… disease. The studies described herein, using LCMS (Liquid chromatography–mass spectrometry) demonstrate that adult acquired infection alters the neurochemistry and transcriptome of the brains of BALB/c mice. Notable changes to tryptophan, purine, arginine and carnitine metabolism were observed …
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Assessing age-height relationship using ICESat-2 and Landsat time series products of southern pines in southeastern region
… and the Landscape Change Monitoring System (LCMS) Fast Loss product to identify previously clear-cut pine plantations. We subtracted the LCMS Fast Loss year from the date of the ICESat-2 acquisition to determine plantation age at the time of the height measurement. We stratified the data for …
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A Classical Delphi Study: Identifying the Essential Leadership Characteristics, Traits, and Skills of Lutheran School Leaders
… of Lutheran Church Missouri Synod (LCMS) schools. This study examines the qualities, characteristics and traits possessed by successful Lutheran school leaders to provide a framework for developing current and future leaders of Lutheran schools. Today’s Lutheran school administrator …
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Základní anorganické výroby Tvorba e-learningových studijních materiálů
… využití, klady a zápory), o systémech LMS, LCMS a základních prvcích pro tvorbu interaktivních učebních pomůcek, které napomáhají zvýšit kvalitu e-learningu. Výstupem je výukový software obsahující vizuální animace pro výuku základních anorganických výrob v chemickém průmyslu (výrobu …
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Exploring the molecular diversity and biomedicinal potential of marine invertebrates and South African actinomycetes for tuberculosis drug discovery
… extracts were dereplicated using 1H NMR, HR-LCMS with GNPS molecular networking. The extracts were subsequently subjected to an activity-guided isolation process to yield heteronemin from Hyrtios reticulatus extract, and bengamides P and Q from Jaspis splendens extract. A new bengamide …
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Automated Synthesis of Duplex-Forming Recognition-Encoded Oligomers
… using liquid chromatography-mass spectrometry (LCMS) and the undesired reactions were supressed by the choice of resin, solvent and coupling conditions. A 42-mer REMO was synthesised and purified by high-performance liquid chromatography, displaying the scope of the SPS approach. The tetramer …
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Cytotoxicity and anti-mycobacterial activities of sclerocarya birrea and Dodonae viscosa anguistifolia against MTB strain
… with liquid chromatography-Mass spectrometry (LCMS) method. The antimycobacterial activity against M. smegmatis was determined using the microbroth dilution assay. The cytotoxicity of the plant extracts was assessed using the MTT assay. Results: The percentage yield ranged from 21.07% (DBC) to …
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Isolation and characterisation of bioactive compounds from Vitex pinnata and associated fungal endophytes
… of metabolomics including hyphenated HR-LCMS, NMR and integrated with in-house database, AntiMarin were utilised to exploit endophytic fungal natural products from V. pinnata. Preliminary exploration of secondary metabolites production of all three endophytic fungi was simply achieved by …
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Literature Review on Li⁺/Na⁺ and Li⁺/K⁺ Separation Processes Compatible with Multistage MSED/NF Lithium Extraction System
… processes and has potential in this context; LCMs are still early in technological development. SX literature reveals some promising extractants and process parameters that yield high selectivities S(Li⁺/Na⁺) & S(Li⁺/K⁺) and high lithium recovery rates. Next steps would include evaluating the …
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Comparing diene derivatisation methods of dry blood spot samples for vitamin D metabolites quantification by liquid chromatography-tandem mass spectrometry
… techniques can overcome inherent limitations in LCMS/MS and enhance analytical performance. In Chapter 3 the materials and methods used and the study design is laid out, describing a brief introduction of the routinely used clinical diagnostics assay enzyme-linked immunosorbent assay (ELISA) as a …
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Molecular Pathology: Potential Biomarkers For The Detection Of Down Syndrome Pregnancies
… clude liquid chromatography mass spectrometry (LCMS) to identify pos- sible new biomarkers for DS pregnancies and investigate the potential use of PRSS56 and SPINK7 proteins as two new target biomarkers for DS. We will also use multiplex droplet digital PCR (ddPCR) using cell-free fetal DNA …
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Bayesian Latent Class Models
… Biology and Marketing. In this paper, several LCMs are developed in Bayesian framework to address new challenges in different applications. The first work is about the MR image segmentation. For MR images, we usually need to simultaneously segment multiple images, which are believed to have …
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High-Throughput Methods For Reaction Development Using The Mosquito® Liquid Handling Robot
… data was achieved using high-throughput LCMS analysis with internal standards and calibration curves. Data were tested by statistical methods integrated into the Excel Spreadsheet. Using the standardised high-throughput protocol, reaction conditions for the Chan-Lam were assessed using …
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Laboratory study of the atmospheric heterogeneous oxidation of benzo[a]pyrene
… using liquid chromatography mass spectrometry (LCMS), validating the AMS as an effective, on-line method for product identification of PAH reaction products. Elemental analysis by the AMS revealed a higher oxygen to carbon ratio in the products of reaction with OH versus O₃, suggesting OH has …
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