Tufa
Mostrando 1-12 de 31 artigos, teses e dissertações.
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1. Molecular identification of a cyclodextrin glycosyltransferase-producing microorganism and phylogenetic assessment of enzymatic activities
Abstract: Cyclodextrin glycosyltransferases (CGTases) are important enzymes in the biotechnology field because they catalyze starch conversion into cyclodextrins and linear oligosaccharides, which are used in food, pharmaceutical and cosmetic industries. The CGTases are classified according to their product specificity in α-, β-, α/β- and γ-CGTases. As
An. Acad. Bras. Ciênc.. Publicado em: 07/10/2019
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2. Phenotypic, genetic and bioactivity analyses of Brazilian cyanobacterial isolates from the genera Fischerella and Hapalosiphon / Análise fenotípica, genética e de bioatividade de isolados brasileiros de cianobactérias dos gêneros Fischerella e Hapalosiphon
A afiliação genérica de Fischerella e Hapalosiphon é problemática devido à instabilidade dos caracteres morfológicos. Os gêneros Fischerella e Hapalosiphon são diferenciados pela presença de tricoma multisseriado e uni ou bisseriado, respectivamente. Porém, geneticamente esses caracteres não se mostraram diacríticos para diferenciar gêneros. Es
Publicado em: 2009
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3. Fossils in quaternary micrites of Bodoquena Range, Bonito-MS and their application in paleoenvironmental studies / Fósseis em micritos quaternários da Serra da Bodoquena, Bonito-MS e sua aplicação em estudos paleoambientais
Bonito town and surrounding areas in Mato Grosso do Sul state are tourist attractions related with many quaternary carbonate deposits which form waterfalls, dams and render almost zero turbidity waters. That area is part of the National Park of Bodoquena Range and Pantanal Biosphere Reserve (UNESCO). Calcareous tufa are porous rocks formed by calcium carbona
Publicado em: 2009
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4. Tufas calcárias da Serra da Bodoquena, MS / "Calcareous tufa from Bodoquenas Ridge, MS"
Aflorando abundantemente nas drenagens da Serra da Bodoquena, região sudoeste do Estado de Mato Grosso do Sul, os depósitos de tufas calcárias, descritos como a porção superior da Formação Xaraiés, representam o mais notável depósito do tipo no Brasil, devido à variedade de formas. Sendo a maior atração do pólo eco-turístico de Bonito, MS, as
Publicado em: 2009
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5. Morphological and molecular characterization of the cyanobacterial genus Anabaena isolated from Brazilian water bodies / Caracterização morfológica e molecular de cianobactérias do gênero Anabaena isoladas de corpos dágua brasileiros
Com o advento dos estudos moleculares evolutivos baseados nas sequências dos genes de RNAr 16S em cianobactérias, a taxonomia de Anabaena (Cyanobacteria) tem sido amplamente discutida e uma revisão deste gênero faz-se necessária. Os problemas variam desde o nível genérico, tal como o grupo Anabaena Aphanizomenon, até níveis de diferenciação de lin
Publicado em: 2009
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6. Avaliação do teor de cal livre em escória de aciaria elétrica
A escória de aciaria elétrica é um resíduo gerado no processo de fabricação de aço, que apresenta propriedades físicas adequadas quando aplicada em alguns materiais da área de construção civil. Entretanto, possui algumas limitações causadas pela presença de compostos que sofrem reações expansivas quando exposta ao ambiente (óxidos de cálcio
Publicado em: 2007
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7. Transcription of tufA and other chloroplast-encoded genes is controlled by a circadian clock in Chlamydomonas.
Levels of mRNA for the chloroplast-encoded elongation factor Tu (tufA) showed a dramatic daily oscillation in the green alga Chlamydomonas reinhardtii, peaking once each day in the early light period. The oscillation of tufA mRNA levels continued in cells shifted to continuous light or continuous dark for at least 2-3 days. Run-off transcription analyses sho
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8. Different fates of the chloroplast tufA gene following its transfer to the nucleus in green algae.
Previous work suggested that the tufA gene, encoding protein synthesis elongation factor Tu, was transferred from the chloroplast to the nucleus within the green algal lineage giving rise to land plants. In this report we investigate the timing and mode of transfer by examining chloroplast and nuclear DNA from the three major classes of green algae, with emp
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9. Evidence for an internal promoter preceding tufA in the str operon of Escherichia coli.
We constructed plasmids carrying tufA from which the major promoter for the rpsL-rpsG-fus-tufA operon (also called the str operon) had been removed. These plasmids continued to express tufA, as judged by the ability to complement mocimycin resistance and by electrophoretic analysis of synthesized proteins. Tn5 transpositions into fus, the gene for elongation
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10. Mutants of Escherichia coli altered in both genes coding for the elongation factor Tu.
Genetic analysis of a mutant of Escherichia coli resistant to the antibiotic mocimycin is presented. This resistance is due to alterations in both tuf genes coding for the elongation factor Tu. Mocimycin resistance is recessive. Bacteria carryong only one tuf gene from the resistant mutant are still mocimycin sensitive. If the mutant gene is the tufA gene, t
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11. Location of pinO, a new gene located between tufA and rpsJ, on the physical map of the Escherichia coli chromosome.
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12. Euglena gracilis chloroplast DNA: the untranslated leader of tufA-ORF206 gene contains an intron.
Structural features of a dicistronic 1.95 kb mRNA coding for the chloroplast specific elongation factor Tu and ORF206 are described. The unspliced pre-mRNA is composed of 2562 nucleotides and undergoes four splicing events which remove a total of 606 nucleotides. The first intron splits the untranslated leader, two introns dissect the tufA coding region and