Thermal Analysis And Chromatographic
Mostrando 13-24 de 24 artigos, teses e dissertações.
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13. CaracterizaÃÃo de ligante asfÃltico brasileiro e avaliaÃÃo da presenÃa de hidrocarbonetos policÃclicos aromÃticos (HPAs) / Characterization of brazilian binder processed and evaluation of the presence of hydrocarbons polycyclic aromatics (HPAs)
The Brazilian binder processed at Petrobras/Lubnor from a crude of the state of EspÃrito Santo was investigated using the following procedures: spectrometric methods (RMN and FTIR), chromatographic (GPC), thermal analysis (TGA) and atomic microscopy (AFM). The two main fractions of the binder, maltenes and asphaltenes, were also analyzed. Hydrocarbons polyc
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 20/07/2007
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14. Produção de extratos secos padronizados de plantas medicinais brasileiras: estudo da viabilidade técnica e econômica do processo em leito de jorro / Standardized dried extracts of Brazilian medicinal plants: assessment of technical and economical feasibility of the spouted bed drying
The aim of this work was to investigate the technological and economical feasibility of the spouted bed drying process for production of the standardized dried extracts of Brazilian medicinal plants using the Bauhinia forficata Link as an experimental model. The objective was to demonstrate the potential of this technology for the processing of medicinal pla
Publicado em: 2007
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15. Estudo termoanalÃtico e cromatogrÃfico de fÃrmacos anti-reumÃticos frequentemente manipulados pelo setor magistral / Thermoanalitic and chromatographic study of drugs frequent anti-rheumatics manipulation by the magisterial section
Atualmente, o setor magistral exerce um importante papel nos cuidados para com a saÃde, sendo necessÃrio cada vez mais sua adequaÃÃo à legislaÃÃo vigente, de modo a garantir a qualidade de seus produtos. No Brasil, à crescente a opÃÃo por fÃrmulas manipuladas, como alternativa aos medicamentos industrializados, uma vez que à possÃvel o preparo d
Publicado em: 2006
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16. Preparação de colunas para cromatografia liquida de alta eficiencia recheadas com polissiloxanos (C1, C8 e C14) imobilizados sobre particulas de silica porosa de 5mum
In this work, reversed phases for High-Performance Liquid Chromatography (HPLC) were obtained by deposition of polysiloxanes with different lateral chains, C1 (polydimethylsiloxane), C8 (polymethyloctylsiloxane) and C14 (polymethyltetradecylsiloxane), in HPLC silica particles, followed by immobilizatíon using different processes: thermal treatment, self-imm
Publicado em: 2004
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17. Tetraciclinas em medicamentos veterinários e produtos lácteos. / Tetraciclinas em medicamentos veterinarios e produtos lacteos.
The objectives of the present study were establish and validate analytical methods (using flow injection analysis - FIA and high performance liquid chromatography - HPLC) for the determination of oxitetracycline (OTC), doxycycline (DC) and tetracycline (TC) in veterinarians drugs and foods (milk and yoghurt). As well as evaluating the stability of these tetr
Publicado em: 2004
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18. Rheological analysis of the phenolic and furfuryl resins used in the carbon materials processing
Carbon materials processing is an advanced technology due to its aerospace and medical applications. In the aerospace area one can mention the carbon/carbon composites used in rockets and aeronautical brakes; in the medical area one can mention the intrabody implant tools such as heart and hydrocephalic valves and pacemaker electrode tips. The highly sophist
Materials Research. Publicado em: 2000-04
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19. Argon detector: alternative detection system for gas-liquid chromatographic analysis of short-chain organic acids.
Two detection systems for gas-liquid chromatography were compared for the identification of metabolic end products (short-chain organic acids) from anaerobic bacteria. Argon and flame ionization detectors were connected in series with inert argon as the carrier gas for analysis of 35 stock strains and 148 clinical isolates. There was an excellent correlation
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20. Rapid Method for the Radioisotopic Analysis of Gaseous End Products of Anaerobic Metabolism
A gas chromatographic procedure for the simultaneous analysis of 14C-labeled and unlabeled metabolic gases from microbial methanogenic systems is described. H2, CH4, and CO2 were separated within 2.5 min on a Carbosieve B column and were detected by thermal conductivity. Detector effluents were channeled into a gas proportional counter for measurement of rad
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21. Gas-chromatographic analysis of mycolic acid cleavage products in mycobacteria.
Mycolic acids were detected in both reference strains and clinical isolates of mycobacteria using gas chromatography of fatty acid methyl esters prepared by acid methanolysis. The methyl esters were extracted with hexane, concentrated, and analyzed with a gas chromatograph by using two different injector temperatures. When the samples were analyzed at high i
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22. Base Ratio and Deoxyribonucleic Acid Homology Studies of Six Staphylococcus aureus Typing Bacteriophages1
Genetic relatedness among Staphylococcus aureus typing bacteriophages 80, 47, 81, 71, 77, and 187 was investigated by using base ratio determinations and deoxyribonucleic acid (DNA)-DNA hybridization. Guanine/cytosine (G/C) content, as determined by thermal denaturation and chromatographic analysis of the purines released by acid hydrolysis of the DNA, was b
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23. New Method of Denitrification Analysis of Bradyrhizobium Field Isolates by Gas Chromatographic Determination of 15N-Labeled N2
To evaluate the denitrification abilities of many Bradyrhizobium field isolates, we developed a new 15N-labeled N2 detection methodology, which is free from interference from atmospheric N2 contamination. 30N2 (15N15N) and 29N2 (15N14N) were detected as an apparent peak by a gas chromatograph equipped with a thermal conductivity detector with N2 gas having n
American Society for Microbiology.
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24. Assignment of CDC Weak Oxidizer Group 2 (WO-2) to the Genus Pandoraea and Characterization of Three New Pandoraea Genomospecies
CDC weak oxidizer group 2 (WO-2) consists of nine phenotypically similar human clinical isolates received by the Centers for Disease Control and Prevention between 1989 and 1998. Four of the isolates were from blood, three were from sputum, and one each was from bronchial fluid and maxillary sinus. All are aerobic nonfermentative, motile gram-negative rods w
American Society for Microbiology.