Spectometry
Mostrando 1-12 de 13 artigos, teses e dissertações.
-
1. Reflectancia espectral de solos.
Usando as cores para caracterizar as propriedades dos solos ou atraves de fotografias aereas para a discriminacao de pedoformas , os pedologos, ja ha algum tempo, compreenderam a importancia do uso dos recursos oferecidos pela luz refletida como instrumento para compreender a distribuicao dos solos na paisagem ou para a descricao de suas propriedades. A rapi
Planaltina. Publicado em: 2011
-
2. Influência do modo de ativação e de uma restauração simulada de porcelana no grau de conversão e na dureza superficial de um cimento resinoso auto-adesivo de cura dual / Influence of polymerization mode and a simulated ceramic restoration on degree of conversion and surface hardness of a dual-cured self-adhesive resin cement
The aim of this study was to evaluate the degree of conversion (DC) and the microhardness of a self-adhesive resin cement under different activation protocols, immediately and after 24 hours of the beginning of the polymerization, and, defining cement regarding monomer composition, average diameter of the inorganic fillers and the percentage by weight of the
Publicado em: 2008
-
3. Ampliando as potencialidades da tecnica de geração de hidretos / Extending the potentialities of the hydride generation technique
Este trabalho tem como objetivo a investigação das potencialidades da técnica de geração de hidretos associada à espectrofotometria e a técnica de absorção atômica com atomização em tubo de níquel. Usando detecção espectrofotométrica, são testados dois reagentes: dicromato e permanganato de potássio. As reações são carentes de seletivida
Publicado em: 2005
-
4. Tricotecenos em milho : otimização e avaliação de metodo analitico utilizando cromatografia a gas associada a espectrometria de massas e levantamento da incidencia em milho e em produtos de milho no estado de São Paulo / Trichothenes in corn : optimization and evaluation of analytical method using a chromatography gas mass spectometry and incidence survey in corn and corn products in the state of São Paulo
Um bom número de espécies de fungos pode, sob condições especiais, produzir metabólitos secundários tóxicos conhecidos como micotoxinas. Cerca de 20 grupos de toxinas são conhecidos hoje, porém, algumas têm recebido atenção especial devido à sua toxicidade e ampla ocorrência natural: aflatoxinas, zearalenona, ocratoxina A, fumonisinas e tricote
Publicado em: 2003
-
5. Caracterização de escorias e recuperação do silicio / Characterization of slag and recovery of the silicon
Metallurgieal Grade Silicon (MGSi) is produced by a well-established industrial process that consists of the carbo-reduction of quartz in a submerged are fumace under high temperature. The process is an intensive energy consumption method (13 - 15 kWh to each kilogram of produced MGSi). After tapered, the MGSi is submitted to some purification stages in orde
Publicado em: 2003
-
6. Aroeira da praia: estudo farmacognÃstico e da atividade biolÃgica de Schinus terebinthifolius raddi (anacardiaceae)
The present work ment to validate traditional knowledge about Aroeira (Schinus therebenthifolium Raddi, Anacardiaceae). The evaluation between efficacy and safety of the crude extract and its terpenoid and tannic fractions was based on ANVISA Resolution RDC n 17/200 on phytotherapics. The fractions were made from bark of stems to establish a pharmacognosti
Publicado em: 2002
-
7. Cladonia verticillaris (lÃquen) como biomonitor padrÃo da qualidade do ar no distrito de JaboatÃo-PE
Liquens are recognized as environmental bioindicators and biomonitors of air quality. In this research the District of JaboatÃo, Metropolitan Meso-region of Recife (MMR), Pernambuco, Brazil was selected for evaluating the air quality in that area, correlating data obtained from the biological monitors â liquens, with the results obtained in the stations of
Publicado em: 2002
-
8. Mass Spectometry–Based SARS Genotyping
Public Library of Science.
-
9. Application of capillary electrophoresis-electrospray ionization mass spectometry in the determination of molecular diversity.
By means of capillary electrophoresis coupled online to electrospray ionization MS, a library of theoretically 171 disubstituted xanthene derivatives was analyzed. The method allowed the purity and makeup of the library to be determined: 160 of the expected compounds were found to be present, and 12 side-products were also detected in the mixture. Due to the
-
10. Fluorescently labeled pulmonary surfactant protein C in spread phospholipid monolayers.
Pulmonary surfactant, a lipid-protein complex, secreted into the fluid lining of lungs prevents alveolar collapse at low lung volumes. Pulmonary surfactant protein C (SP-C), an acylated, hydrophobic, alpha-helical peptide, enhances the surface activity of pulmonary surfactant lipids. Fluorescein-labeled SP-C (F-SP-C) (3, 6, 12 wt%) in dipalmitoylphosphatidyl
-
11. Purification and characterization of an amidase from an acrylamide-degrading Rhodococcus sp.
A constitutively expressed aliphatic amidase from a Rhodococcus sp. catalyzing acrylamide deamination was purified to electrophoretic homogeneity. The molecular weight of the native enzyme was estimated to be 360,000. Upon sodium dodecyl sulfate-polyacrylamide gel electrophoresis, the purified preparation yielded a homogeneous protein band having an apparent
-
12. Testing Models of Fatty Acid Transfer and Lipid Synthesis in Spinach Leaf Using in Vivo Oxygen-18 Labeling1
Oxygen-18 labeling has been applied to the study of plant lipid biosynthesis for the first time. [13C218O2]Acetate was incubated with spinach (Spinacia oleracea) leaves and the 18O content in fatty acid methyl esters isolated from different lipid classes measured by gas chromatography-mass spectometry. Fatty acids isolated from lipids synthesized within the
American Society of Plant Physiologists.