Hii Regions
Mostrando 1-12 de 16 artigos, teses e dissertações.
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1. Formação estelar no complexo de nuvens moleculares em Monoceros / Star Formation in the Molecular Cloud Complex in Monoceros
We compare two molecular clouds of the Monoceros Complex in order to study their physical conditions related to the early stages of star formation. The selected clouds, Rosette (RMC) and Monoceros R2 (Mon R2), are interesting regions due to their characteristics that may be confronted with the hypothesis of star formation triggered by high velocity clouds (H
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 04/05/2012
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2. CLASSIFICAÇÃO ESPECTRAL E DETERMINAÇÃO DE DISTÂNCIA DE ESTRELAS EM DEZ REGIÕES HII DO HEMISFÉRIO SUL
In order to determine distances of Southern Galactic HII regions, we carried out spectroscopic and photometric observations of the stellar content of a set of these objects. We have chosen objects only visible in the South hemisphere, with no published or uncertain distances. In this work, we present spectral classification based on intermediate dispersion s
Publicado em: 2009
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3. CATÁLOGO DE DADOS ESPECTROSCÓPICOS DE REGIÕES HII E ESTUDOS APLICADOS
Medidas quantitativas de intensidades de linhas de emissão têm sido feitas desde o inıcio do século passado. A quantidade e a qualidade dos dados disponíveis têm crescido drasticamente com o advento dos detectores eletrônicos. Porém, os dados estão amplamente espalhados na literatura. Diante disso, compilamos um catálogo de intensidades de linh
Publicado em: 2009
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4. Chemical compositions of Magellanic Clouds' HII regions based on photoelectric spectrophotometry
Detailed line intensity measurements secured at Cerro Tololo Interamerican Observatory and corrected for interstellar extinction are presented for 19 HII regions in the Large Magellanic Cloud and 6 in the Small Magellanic Cloud. The elemental abundances derived by simple methods appear to be in good accord with those found by other observers. Detailed discus
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5. Characterization of transfer regions within the HII incompatibility group plasmid pHH1508a.
A circular map of the 208-kilobase IncHII plasmid pHH1508a was constructed by using the restriction endonucleases XbaI, XhoI, and NotI. Tn5 insertion mutagenesis showed that transfer genes were distributed widely over the plasmid map. Analysis of the deletion mutant pDT1178 indicated that genes required for conjugative pilus production are located in a 96.0-
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6. Physical and genetic map of Streptococcus thermophilus A054.
The three restriction endonucleases SfiI, BssHII, and SmaI were found to generate fragments with suitable size distributions for mapping the genome of Streptococcus thermophilus A054. A total of 5, 8, and 24 fragments were produced with SfiI, BssHII, and SmaI, respectively. An average genome size of 1,824 kb was determined by summing the total fragment sizes
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7. Model nebulae and determination of the chemical composition of the Magellanic Clouds
An analysis of previously presented photoelectric spectrophotometry of HII regions (emission-line diffuse nebulae) in the two Magellanic Clouds is carried out with the aid of theoretical nebular models, which are used primarily as interpolation devices. Some advantages and limitations of such theoretical models are discussed. A comparison of the finally obta
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8. The 5′-Untranslated Region of the ntp303 Gene Strongly Enhances Translation during Pollen Tube Growth, But Not during Pollen Maturation
Transcripts of the ntp303 gene accumulate abundantly throughout pollen development, whereas the protein only accumulates to detectable levels after pollen germination. In an attempt to explain the divergence in the accumulation profiles of the mRNA and the protein, we investigated the role of the untranslated regions (UTRs) in enhancing ntp303 translation du
American Society of Plant Physiologists.
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9. Physical map of the linear chromosome of the bacterium Borrelia burgdorferi 212, a causative agent of Lyme disease, and localization of rRNA genes.
The spirochete Borrelia burgdorferi, which causes Lyme disease, and other members of the Borrelia genus are unique among characterized bacteria in having a linear chromosome. A restriction map of the chromosome of B. burgdorferi 212 was constructed by making extensive use of digestions in agarose blocks of restriction endonuclease fragments or chromosomal DN
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10. Identification of a Genetic Locus Essential for Serotype b-Specific Antigen Synthesis in Actinobacillus actinomycetemcomitans
A large gene cluster associated with the biosynthesis of the serotype-specific polysaccharide antigen (SPA) of Actinobacillus actinomycetemcomitans Y4 (serotype b) was cloned and characterized. Western blot analysis showed that Escherichia coli DH5α, containing a plasmid carrying this cluster, produced a polysaccharide which reacted with a monoclonal antibo
American Society for Microbiology.
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11. Influence of membrane-spanning alpha-helical peptides on the phase behavior of the dioleoylphosphatidylcholine/water system.
The effect of solubilized hydrophobic peptides on the phase behavior of dioleoylphosphatidylcholine (DOPC)/water system was studied by 2H- and 31P-NMR spectroscopy and by x-ray diffraction, and partial phase diagrams were constructed. The utilized peptides were HCO-AWW(LA)5WWA-NHCH2CH2OH (WALP16), which is an artificial peptide designed to resemble a transme
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12. Encephalitozoon cuniculi (Microspora) genome: physical map and evidence for telomere-associated rDNA units on all chromosomes
A restriction map of the 2.8-Mb genome of the unicellular eukaryote Encephalitozoon cuniculi (phylum Microspora), a mammal-infecting intracellular parasite, has been constructed using two restriction enzymes with 6 bp recognition sites (BssHII and MluI). The fragments resulting from either single digestions of the whole molecular karyotype or double digestio
Oxford University Press.