Es Layer
Mostrando 13-23 de 23 artigos, teses e dissertações.
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13. Modificação de processo de fabricação de folha de flandres atraves da inibição de crescimento da camada de liga Fe-Sn
This work presents the manufacturing process of tinp1ate modified by interposition of a nickel thin lager between the stee1, and tin. The conventiona1 product was characterized by anodic dissolution, X-rays diffraction and Auger spectroscopy in order to investigate the tinplate composition ond structure. The corrosion resistance of tinplate was investigate b
Publicado em: 1989
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14. Precipitacao de partículas e efeitos ionosféricos associados na região da anomalia geomagnética brasileira / Particle precipitation and associated ionospheric effects in the Brazilian Geomagnetic Anomaly region
The purpose of the present study is to examine the significance of quiet time ionization due to charged particle precipitation in the E-region over Brazilian Geomagnetic Anomaly. Ionosonde data of the sporadic E layer obtained for São José dos Campos (23°12 S, 45°51 W) and Cachoeira Paulista (22°42 S, 45°01 W) for a few months during the period 1973-74
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 05/12/1975
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15. Generation of Rx+/Pax6+ neural retinal precursors from embryonic stem cells
We report directed differentiaion of retinal precursors in vitro from mouse ES cells. Six3+ rostral brain progenitors are generated by culturing ES cells under serum-free suspension conditions (SFEB culture) in the presence of Wnt and Nodal antagonists (Dkk1 and LeftyA), and subsequently steered to differentiate into Rx+ cells (16%) by treatment with activin
National Academy of Sciences.
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16. Enforced Bcl-2 expression overrides serum and feeder cell requirements for mouse embryonic stem cell self-renewal
Leukemia inhibitory factor (LIF) is required, but not sufficient, for pluripotent mouse embryonic stem (ES) cell expansion in vitro in the absence of serum or a feeder cell layer, suggesting that additional signals are provided by serum or feeders that are necessary to support self-renewal. Here we show that transgenic ES cell lines expressing Bcl-2, an anti
National Academy of Sciences.
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17. Structures of two different surface layers found in six Bacteroides strains.
The structures of crystalline layers from six Bacteroides strains were studied by electron microscopy. Two different hexagonal crystalline surface layers were found, one with a unit cell spacing of 21.5 nm and another with a spacing of 7.7 nm. A three-dimensional structure of the 21.5-nm layer and a two-dimensional projection of the 7.7-nm layer were determi
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18. Cell-Surface-Anchoring Role of N-Terminal Surface Layer Homology Domains of Clostridium cellulovorans EngE
engE, coding for endoglucanase E, one of the three major subunits of the Clostridium cellulovorans cellulosome, has been cloned and sequenced (Y. Tamaru and R. H. Doi, J. Bacteriol. 181:3270-3276, 1999). The N-terminal-half region of EngE possesses three repeated surface layer homology (SLH) domains, which are homologous to those of some bacterial S-layer pr
American Society for Microbiology.
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19. GATA6 regulates HNF4 and is required for differentiation of visceral endoderm in the mouse embryo
GATA6 belongs to a family of zinc finger transcription factors that play important roles in transducing nuclear events that regulate cellular differentiation and embryonic morphogenesis in vertebrate species. To examine the function of GATA6 during embryonic development, gene targeting was used to generate GATA6-deficient (GATA6−/−) ES cells and mice har
Cold Spring Harbor Laboratory Press.
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20. The vav proto-oncogene is required early in embryogenesis but not for hematopoietic development in vitro.
Previous studies have suggested that the vav protooncogene plays an important role in hematopoiesis. To study this further, we have ablated the vav protooncogene by homologous recombination in embryonic stem (ES) cells. Homozygous vav (-/-) ES clones differentiate normally in culture and generate cells of erythroid, myeloid and mast cell lineages. Mice heter
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21. MPB70 and MPB83 as Indicators of Protein Localization in Mycobacterial Cells
Culture fluids after growth of Mycobacterium bovis BCG on Sauton medium contain actively secreted proteins and proteins released by bacterial lysis. BCG culture fluids and sonicates of Mycobacterium tuberculosis and Mycobacterium paratuberculosis were tested after separation by gel filtration and sodium dodecyl sulfate-polyacrylamide gel electrophoresis (SDS
American Society for Microbiology.
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22. Possible Association of GroES and Antigen 85 Proteins with Heat Resistance of Mycobacterium paratuberculosis
Conflicting reports on the heat resistance of Mycobacterium paratuberculosis prompted an examination of the effect of culture medium on this property of the organism. M. paratuberculosis was cultured in three types of media (fatty acid-containing medium 7H9-OADC (oleic acid-albumin-dextrose-catalase supplement) and glycerol-containing media WR-GD and 7H9-GD
American Society for Microbiology.
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23. A novel DNA nucleotide in Trypanosoma brucei only present in the mammalian phase of the life-cycle.
The existence of an unusual form of DNA modification in the bloodstream form of the African trypanosome Trypanosoma brucei has been inferred from partial resistance to cleavage of nuclear DNA with PstI and PvuII (Bernards et al, 1984; Pays et al, 1984). This putative modification is correlated with the shut-off of telomeric Variant-specific Surface Glycoprot