Interlaboratory
Mostrando 13-24 de 178 artigos, teses e dissertações.
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13. Análise dos resultados de ensaios de proficiência via modelos de regressão com variável explicativa aleatória / Analysis of proficiency tests results via regression models with random explanatory variable
Em um programa de ensaio de prociência (EP) conduzido pelo Grupo de Motores, um grupo de onze laboratórios da área de temperatura realizaram medições em cinco pontos da escala de um termopar. Neste trabalho, propomos um modelo de regressão com variável explicativa X (aleatória) representando o termopar padrão que denominaremos por artefato e a vari�
Publicado em: 2004
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14. "Methodology for determination of organic geochemistry biomarkers in sediment - Aliphatic hydrocarbons, PAHs, Sterols and Alkenones" / "Metodologia para determinação de biomarcadores geoquímicos orgânicos em sedimentos - Hidrocarbonetos Alifáticos e Aromáticos, Esteróis e Alquenonas"
The fate of most organic matter in the oceans is the marine sediment. This preserved organic matter became an unique reservoir of information about the operation of biogeochemical processes in the geological past, and how these processes responded to environmental changes. Some molecules are only synthesized by sea organisms, others only by higher plants. Th
Publicado em: 2003
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15. Emergence of resistant Candida in neutropenic patients
Problems with resistance to antifungal drugs have emerged due to an increase in the incidence of systemic fungal infections and widespread use of antifungal agents. Accordingly, efforts have been made to develop adequate fungal susceptibility tests. The ideal test should have high intra and inter-laboratory reproducibility, good correlation with the clinical
Brazilian Journal of Infectious Diseases. Publicado em: 2002-06
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16. Estimação pontual dos coeficientes de repetibilidade e reprodutibilidade em ensaios interlaboratoriais
This dissertation studies punctual estimators of the repeatability coefficient (r) and reproducibility coefficient (R) in interlaboratory test. Assuming a linear balanced model, with random effects corresponding to the laboratories, four estimators based on variance component are considered. The estimators were the moment, the truncated one, the maximum like
Publicado em: 1997
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17. A report on the interlaboratory quantitation of haemoglobin A2 and haemoglobin F
An interlaboratory trial of the quantitation of Hb A2 and Hb F has been carried out on two samples of blood by 90 laboratories in the British Isles. The results have been compared with those obtained by four reference laboratories. Overall, the correlation was very poor and indicated that the methods used have to be standardized before interlaboratory values
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18. Interlaboratory evaluation of Etest method for testing antifungal susceptibilities of pathogenic yeasts to five antifungal agents by using Casitone agar and solidified RPMI 1640 medium with 2% glucose.
An interlaboratory evaluation (two centers) of the Etest method was conducted for testing the antifungal susceptibilities of yeasts. The MICs of amphotericin B, fluconazole, flucytosine, itraconazole, and ketoconazole were determined for 83 isolates of Candida spp., Cryptococcus neoformans, and Torulopsis glabrata. Two buffered (phosphate buffer) culture med
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19. Interlaboratory agreement among results of human papillomavirus type 16 enzyme-linked immunosorbent assays.
Serological assays for measuring antibodies to human papillomavirus type 16 (HPV-16) virus-like particles (VLPs) have become important epidemiologic tools in recent years. However, the interlaboratory replicability of these assays has not been assessed. In this investigation, three laboratories tested a panel of specimens obtained from two different groups:
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20. International Interlaboratory Quality Control Program for Measurement of Antiretroviral Drugs in Plasma
An international interlaboratory quality control program for measurement of antiretroviral drugs was initiated. The first round was confined to protease inhibitors and showed large variability in the performance of participating laboratories. The results demonstrate the need for and utility of an ongoing quality control program in this area of bioanalysis.
American Society for Microbiology.
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21. Application and Evaluation of the Interlaboratory Reproducibility of tRNA Intergenic Length Polymorphism Analysis (tDNA-PCR) for Identification of Streptococcus Species
The discriminatory power, speed, and interlaboratory reproducibility of tRNA intergenic length polymorphism analysis (tDNA-PCR) combined with capillary electrophoresis was evaluated for the identification of streptococci. This method was carried out in three different laboratories under highly standardized conditions for 54 strains belonging to 18 different
American Society for Microbiology.
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22. High Interlaboratory Reproducibility of Matrix-Assisted Laser Desorption Ionization-Time of Flight Mass Spectrometry-Based Species Identification of Nonfermenting Bacteria▿
Matrix-assisted laser desorption ionization-time of flight mass spectrometry has emerged as a rapid, cost-effective alternative for bacterial species identification. Identifying 60 blind-coded nonfermenting bacteria samples, this international study (using eight laboratories) achieved 98.75% interlaboratory reproducibility. Only 6 of the 480 samples were mis
American Society for Microbiology (ASM).
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23. Interlaboratory Comparison of Results of Susceptibility Testing with Caspofungin against Candida and Aspergillus Species
Seventeen laboratories participated in a study of interlaboratory reproducibility with caspofungin microdilution susceptibility testing against panels comprising 30 isolates of Candida spp. and 20 isolates of Aspergillus spp. The laboratories used materials supplied from a single source to determine the influence of growth medium (RPMI 1640 with or without g
American Society for Microbiology.
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24. Investigation into paediatric bilirubin analyses in Australia and New Zealand.
A small regional survey of direct spectrophotometric methods and a larger Australian and New Zealand survey of paediatric bilirubin analyses are described. The overall performance of both groups was unsatisfactory with an unacceptable high interlaboratory variation. This interlaboratory variation was reduced significantly by the use of a spectrophotometric m