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 17 of 17 for “"array detector"”.
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A multi-mode spectrometer for atomic emission spectrometry
… a flat-field grating, and a linear photodiode array detector into a single spectrometer system. With these components, the MMS is capable of applying dispersive, interferometric, or combined dispersive/interferometric techniques for enhanced spectrometric flexibility. The effects of source …
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Admicelle-Based Solid Phase Extraction of Phenols Using Dialkylammonium Surfactant in the Hydroxide Form
… chromatography (HPLC) coupled with a photo diode-array detector.
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Design and Qualification of a Coded Aperture Cycloidal Mass Spectrometer to Detect Perfluorocarbon Tracer Molecules for Environmental Applications
… analyzer, aperture coding, and a focal plane array detector, to enable a mobile instrument capable of detecting PFC tracers with high resolution, sensitivity, and selectivity. The cycloidal mass analyzer utilizes perpendicularly-oriented overlapping electric and magnetic fields to linearly …
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Measurement of the Proton A1 and A2 Spin Asymmetries: Probing Color Forces
… measured using the BETA (Big Electron Telescope Array) Detector. BETA consisted of a scintillator hodoscope, gas ˇCerenkov counter, lucite hodoscope and a large lead glass electromagnetic calorimeter. With a unique open geometry, a threshold gas ˇCerenkov detector allowed BETA to cleanly identify …
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Monitoring for sulfonated azo dyes and their degradation products in industrial and municipal wastewater
… 3RA, and their degradation products. HPLC/ diode array detector, GC/MS, and LC/MS were utilized to characterize the purified dyes and the wastewaters and identify degradation products of the dyes resulting from several biological and chemical treatment processes. Results indicate that chemical …
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C-ARM TOMOGRAPHIC IMAGING TECHNIQUE FOR DETECTION OF KIDNEY STONES
… is a new x-ray imaging modality that uses 2D array detector and cone shaped x-ray beam to create 3D information about the scanned object. Both x-ray source and 2D array detector cells mounted on C-shaped wheeled structure (C-arm). A series of projection images are acquired by rotating the …
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Investigations of microcystins (cyanobacterial peptide toxins) detection, purification and analysis.
… constuct a spectral library, using a photodiode array detector, against which samples were screened and any microcystins present identified and quantified. The above detection method was used to monitor the occurrence of several microcystins present in loch water during a single day. This study …
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Rapid Two-Photon Holographic Scan Microscopy with Individual Quantum Dots and Its Applications in Biological Samples
… that increases the scan rate by 80 fold. An array detector (EMCCD camera) was also used as a detector for 2-photon scanning microscopy, providing faster whole image acquisition and superior detection capabilities compared to a conventional single point detector (a PMT). Wide-field 2-photon …
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Deformation and residual stresses at the intragranular scale – a study using high energy x-ray diffraction and modeling in polycrystalline alloys
… that length scale. A high speed mixed mode pixel array detector was utilized to capture diffraction data at rates of 20-500 Hz. Such temporal resolution was necessary for determination of the strain rate sensitivities of individual slip systems and to detect the intermittency in plastic …
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Characterization of antioxidant activities from fruits rich in delphinidin or malvidin anthocyanins
… characterized by HPLC/MS coupled with a diode array detector. Results showed that blackcurrant contained four predominant anthocyanins, cyanidin 3-glucoside, delphinidin 3-glucoside, cyanidin 3-rutinoside, and delphinidin 3-rutinoside . In contrast, malvidin 3-glucoside, delphinidin …
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Evaluation of a planar optic waveguide as a platform for evanescent field chemical sensor development
… at relevant time intervals using a linear array detector.Model chemical systems were chosen to characterize the Ag$\sp+$-exchange waveguide liquid phase response to bulk refractive index (glycerol), bulk absorbance (bromocresol green), and to simultaneous variations in bulk refractive index …
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Mechanophore activation at heterointerface and surface crowdedness as a determining factor
… the polymer with an anthracene end-cap. UV diode-array detector coupled gel permeation chromatography was used to confirm the selective cleavage of anthracene-containing polymer and to rigorously quantify the kinetic coefficient of mechanochemical reaction. Comparison with mechanophore embedded …
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Chromatographic and mass spectrometric characterization of a landfill leachate and an industrial wastewater
… (GC/MS) and liquid chromatography with a diode array detector (LC/DAD), to identify specific organic chemicals in the samples. GC/MS analysis of the leachate confirmed the presence of two benzenesulfonamides and two phthalate esters. Several other components were detected, but not identified. A …
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Desenvolvimento de método indicativo de estabilidade para detecção de produtos de degradação da associação de zidovudina e lamivudina (300 + 150 mg) em matéria-prima e comprimidos.
… Liquid Chr omatography (HPLC) with diode array detector (DAD). Zidovudine was stable in the less concentrated (0.1 to 1.0 M) as raw materials and compressed acidic and basic conditions and in the neutral hydrolysis and oxidative degradation tablet. However proved to be unstable in the …
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Application of FTIR microscopy to cultural heritage materials
… diamond ATR accessory coupled with a focal plane array to obtain chemical images of multi-layered paint cross sections. A rapid and simple identification of the different compounds is achieved without the use of any infrared microscope objectives. Finally, the latest FTIR techniques available are …
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Tropical citrus antioxidants and catabolism of phenolics in green tea, coffee, cocoa and orange juice
… how HPLC-MS-ESI and HPLC with a photodiode array detector (PDA) was used to identify and quantify flavonoids in the tropical species Citrus microcarpa, Citrus hystrix, Citrus medica var. 1 and 2, Citrus suhuiensis and Citrus medica var. sarcodactylis. Among the major compounds detected were …
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Discrete-frequency infrared imaging with a quantum cascade laser and diffuse optical Raman tomography: methods toward improving clinically relevant label-free chemical contrast
… tissue-mimicking sample. The instrument’s source-detector collection angles were systematically varied to achieve multiple diffuse projections. Two light fluence modeling methods, radiative transport calculation and Monte Carlo simulation, were compared. Reconstruction of the size and position of …