Carrier Detection
Mostrando 13-24 de 223 artigos, teses e dissertações.
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13. Pré-concentração por extração em ponto nuvem para determinação de cádmio em amostras de bebidas por espectrometria de absorção atômica como forno tubular na chama e aerossol térmico / Preconcentration and Determination of Cadmium in Beverage Samples by Cloud Point Extraction and Thermospray Flame Furnace Atomic Absorption Spectrometry detection
In this work, it was evaluated extraction/preconcentration cloud point procedure for cadmium determination in soft drinks samples stored in polyethylene terephthalate (PET) packaging and detection by thermospray flame furnace atomic absorption spectrometry (TS -FF-AAS). For the cloud point preconcentration procedure were used Triton X-114 as surfactant, PAN
Publicado em: 2010
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14. Genomic analysis of Brazilian patients with fabry disease
Fabry disease is an X-linked lysosomal disorder due to α-galactosidase A deficiency that causes storage of globotriaosylceramide. The gene coding for this lysosomal enzyme is located on the long arm of the X chromosome, in region Xq21.33-Xq22. Disease progression leads to vascular disease secondary to involvement of kidney, heart and the central nervous sys
Publicado em: 2010
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15. Desenvolvimento de métodos analíticos para determinação de terras raras, Th, U e Y em rochas, solos e sedimentos por ICP-MS
In this work, the introduction of dissolved geological certified reference materials in the plasma through pneumatic (PN) and ultrasonic (USN) nebulizers was studied, in order to compare both nebulizers performances in connection to the determination of rare earth elements (REE), U, Th and Y in geological samples by inductively coupled plasma mass spectromet
Publicado em: 2010
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16. Folatos, capacidade antioxidante e trans-2-nonenal em cerveja brasileira / Folate, antioxidant capacity and E-2-nonenal in Brazilian beer
In the present study methods were adapted and applied to quantify levels of folate, antioxidant capacity assessment and E-2-nonenal quantification in Brazilian beers. 5 brands of Pilsen, non-alcoholic and Malzbier beers were used, in can and amber bottle. For determination of folates (folic acid - FA, 10-methyl-folic acid - 10Methyl, 5-methyltetrahydrofolate
Publicado em: 2010
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17. Integrating production and perception of secundary prominences in a dynamical perspective of rhythm / Integrando produção e percepção de proeminencias secundarias numa abordagem dinamica do ritmo da fala
The thesis investigates two main subjects: secondary stress in Brazilian Portuguese (BP) and the link between rhythm production and rhythm perception. Both subject matters are developed in light of Barbosa s (2006, 2007) coupled-oscillator model of rhythm production. Interest in secondary stress in BP is fostered by the fact that its existence, nature and di
Publicado em: 2010
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18. Sistemas de análises químicas em fluxo explorando mecanismos de re-alimentação, calibração multivariada e outras abordagens para melhoria em desempenho / Flow systems exploiting feed-back mechanisms, multivariate calibration and other strategies for improving the analytical performance
Studies focusing on performance of intelligent analytical flow systems, association with multivariate calibration or use of nanocrystals as sensitizers were carried out. Moreover, improvements related to modifications in flow pattern were evaluated with emphasis to in-line dialysis. To this end, a strategy for implementing simultaneous determinations of iron
Publicado em: 2010
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19. Algoritmos de navegação em tempo real para um sistema GPS de posicionamento relativo de precisão / Real time navigation algorithms for a percise GPS relative positioning system
The GPS signal is subject to several error sources in the measurements. The combined effects of these errors in the propagation signal cause a degradation in precision of positioning. However, using carrier phase measurements, it is possible to reduce positioning error up to 100 times, if compared with positioning using code measurernents. However, this type
Publicado em: 2009
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20. DETERMINAÇÃO DE ELEMENTOS MENORES E TRAÇO EM ROCHAS POR LA-ICPMS: PROGRESSOS NA UTILIZAÇÃO DE VIDROS BORATOS COMO ALVOS / DETERMINATION OF MINOR AND TRACE ELEMENTS IN ROCK SAMPLES BY LA-ICPMS: PROGRESS IN THE UTILIZATION OF BORATE GLASSES AS TARGETS
The present master dissertation is a continuation of a research study developed by Leite (2006) aiming at the multielemental analysis of rock samples (basalts, obsidians and shale) by inductively coupled plasma mass spectrometry (ICPMS), in combination with laser ablation (LA) and using borate glass as analytical targets. As in the former work, the experimen
Publicado em: 2009
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21. CHANNEL ESTIMATION AND SIGNAL DETECTION IN CDMA SYSTEMS WITH MULTI CARRIER / ESTIMAÇÃO DE CANAL E DETECÇÃO DE SINAIS EM SISTEMAS CDMA COM MÚLTIPLAS PORTADORAS
Este trabalho investiga o impacto da utilização de técnicas para melhorar a qualidade da estimação de canal em sistemas MC CDMA (Multi Carrier Code Division Multiple Access) e MC DS CDMA (Multi Carrier Direct Sequence Code Division Multiple Access) em canais seletivos em frequência. Dois tipos de intevalos de guarda são considerados: Prefixo Cíclico
Publicado em: 2008
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22. Desenvolvimento de metodologias para determinação de Cd e Pb em amostras de lodo de esgoto e sedimentos com o emprego da espectrometria de absorção atômica com forno tubular na chama e aerossol térmico / Method development for determination of cadmium and lead in sewage sludge and sediment using thermospray flame furnace atomic absorption spectrometry
In this work, Thermospray Flame Furnace Atomic Absorption Spectrometry (TS-FF-AAS) and Flame Atomic Absorption Spectrometry (FAAS) were employed in order to propose methods for determination of total and bioavailability concentration of Cd and Pb in environmental samples. The sediments were collected in the basin of the Jundiaí river and the sewage sludge (
Publicado em: 2008
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23. CELLULOSE SUBSTRATE ROOM-TEMPERATURE PHOSPHORIMETRY FOR THE DETERMINATION OF 2 METHYL INDOL E 7 METHYL INDOL: METHOD DEVELOPMENT, VALIDATION AND CRITICAL EVALUATION OF THE APPLICABILITY OF THE TECHNIQUE / FOSFORIMETRIA EM TEMPERATURA AMBIENTE EM SUBSTRATO DE CELULOSE PARA A DETERMINAÇÃO DE 2 METIL INDOL E 7 METIL INDOL: DESENVOLVIMENTO DE MÉTODO, VALIDAÇÃO E AVALIAÇÃO CRÍTICA DA APLICABILIDADE DA TÉCNICA
In this work, room-temperature phosphorimetry using cellulose substrates was evaluated as analytical technique for the determination of two indol derivatives (2 methyl indol and 7 methyl indol). The phosphorescence from both analytes were studied in a univaried way in function of several experimental parameters such as the phosphorescence decay rate; type an
Publicado em: 2008
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24. Determining plasma morphine levels using GC-MS after solid phase extraction to monitor drug levels in the postoperative period
OBJECTIVE: To implement a selective and sensitive analytical method to quantify morphine in small volumes of plasma by gas-liquid chromatography-mass spectrometry (GC-MS), aimed at post-operatively monitoring the drug. METHOD: A gas-liquid chromatographic method with mass detection has been developed to determine morphine concentration in plasma after solid
Clinics. Publicado em: 2008