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	Provedor de dados BJM (2) ArchiMer (1) Autor Barros,Henrique Lins de (1) Bickert, Torsten (1) Chaudhary,Prem Prashant (1) Dekkers, Mark J. (1) Esquivel,Darci Motta S. (1) Farina,Marcos (1) Freitas,Flavia (1) Just, Janna (1) Keim,Carolina Neumann (1) Lins,Ulysses (1) Rulík,Martin (1) Van Hoesel, Annelies (1) Von Dobeneck, Tilo (1) Mais... Palavra-chave Magnetotactic bacteria (3) 16S rRNA gene (1) Cloning (1) Electron microscopy (1) Environmental magnetism (1) Harvesting uncultured bacteria (1) IRM end-member modeling (1) NW Africa (1) PCR (1) Paleoclimate (1) Phylogeny (1) Sediment (1) Terrigenous input (1) Mais... Tipo do documento Info:eu-repo/semantics/article (2) Text (1) Ano 2014 (1) 2012 (1) 2003 (1) País Brazil (2) France (1) Idioma Inglês (3)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 3 Primeira ... 1 ... Última Signatures and significance of aeolian, fluvial, bacterial and diagenetic magnetic mineral fractions in Late Quaternary marine sediments off Gambia, NW Africa ArchiMer Just, Janna; Dekkers, Mark J.; Von Dobeneck, Tilo; Van Hoesel, Annelies; Bickert, Torsten. Two gravity cores retrieved off NW Africa at the border of arid and subtropical environments (GeoB 13602-1 and GeoB 13601-4) were analyzed to extract records of Late Quaternary climate change and sediment export. We apply end-member (EM) unmixing to 350 acquisition curves of isothermal remanent magnetization (IRM). Our approach enables to discriminate rock magnetic signatures of aeolian and fluvial material, to determine biomineralization and reductive diagenesis. Based on the occurrence of pedogenically formed magnetic minerals in the fluvial and aeolian EMs, we can infer that goethite formed in favor to hematite in more humid climate zones. The diagenetic EM dominates in the lower parts of the cores and within a thin near-surface layer probably... Tipo: Text Palavras-chave: IRM end-member modeling; NW Africa; Environmental magnetism; Magnetotactic bacteria; Paleoclimate; Terrigenous input. Ano: 2012 URL: https://archimer.ifremer.fr/doc/00265/37617/36987.pdf Molecular identification of the occurrence of magnetotactic bacteria in fresh water sediments (Czech Republic) BJM Rulík,Martin; Chaudhary,Prem Prashant. Magnetotactic bacteria (MTB) are of considerable interest because of their importance in the manufacture of various bioinspired materials. In order to find out the status of magnetotactic bacteria at three different sediment in Czech Republic, samples collected from both standing and running freshwaters were subjected to molecular diversity analysis by using 16S rRNA gene approach. Total community DNA from sediment sample was isolated and used for PCR, cloning and sequence analysis. Of the 24 analyzed sequences, six clones are closely related to Magnetobacterium sp. affiliated with the Nitrospira phylum which showed the dominance of Magnetobacterium phylotypes in the sample. This study will provide useful insight about the community structure of MTB in... Tipo: Info:eu-repo/semantics/article Palavras-chave: Magnetotactic bacteria; Sediment; PCR; Cloning; Phylogeny; 16S rRNA gene. Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822014000400016 Simple homemade apparatus for harvesting uncultured magnetotactic microorganisms BJM Lins,Ulysses; Freitas,Flavia; Keim,Carolina Neumann; Barros,Henrique Lins de; Esquivel,Darci Motta S.; Farina,Marcos. A simple apparatus for harvesting uncultured magnetotactic microorganisms is described. This apparatus consists of a glass container with two openings. A large opening on the topside is used to introduce the sediment and water. The sediment and water are previously stored in loosely capped bottles previously tested for the presence of magnetotactic bacteria. The apparatus is exposed to a properly aligned magnetic field of a homemade coil and the bacteria are removed through the capillary end of the second opening of the container. Harvested bacteria can then be used to ultrastrucutral studies using electron spectroscopic imaging. Large numbers of magnetotactic bacteria consisting of cocci and rod-shaped cells were efficiently collected from different... Tipo: Info:eu-repo/semantics/article Palavras-chave: Magnetotactic bacteria; Harvesting uncultured bacteria; Electron microscopy. Ano: 2003 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822003000200004 Registros recuperados: 3 Primeira ... 1 ... Última

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