Division Rings
Mostrando 1-12 de 51 artigos, teses e dissertações.
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1. Funções valorização e anéis de valorização de Dubrovin em álgebras simples / Value functions and Dubrovin valuation rings on simple algebras
Nesta tese estudamos a relação entre duas teorias de valorização não-comutativas: anéis de valorização de Dubrovin e gauges. Os anéis de valorização de Dubrovin foram introduzidos em 1982, como uma generalização para anéis artinianos simples dos anéis de valorização invariantes em álgebras de divisão. Gauges são funções como valorizaç�
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 30/09/2011
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2. Propriedades aritmeticas de corpos com um anel de valorização compativel com o radical de Kaplansky / Arithimetical properties of fields with a valuation ring compatible with the Kaplansky s Radical
Esta tese é um estudo das propriedades aritméticas de corpos que possuem um anel de valorização compatível com o Radical de Kaplansky. São utilizados os métodos da teoria algébrica das formas quadráticas, teoria de Galois e principalmente, a teoria de valorizações em corpos. Apresentamos um novo método para a construção de corpos com Radical de
Publicado em: 2008
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3. Involuções fixando espaços projetivos.
Suppose M is a smooth, closed manifold and T : M ! M is a smooth involution defined on M. It is well known that the fixed point set F of T is a finite and disjoint union of closed submanifolds of M. For a given F, a basic problem in this context is the classification, up to equivariant cobordism, of the pairs (T;M) for which the fixed point set is F. For F =
Publicado em: 2007
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4. On a classification of the integral rings, finite semigroups and RA-loops with the hyperbolic property / Sobre uma classificação dos anéis de inteiros, dos semigrupos finitos e dos RA-loops com a propriedade hiperbólica
For a given division algebra of a quaternion algebra, we construct and define two types of units of its $\Z$-orders: Pell units and Gauss units. Also, for the quadratic imaginary extensions over the racionals and some fixed group $G$, we classify the algebraic integral rings for which the unit group ring is a hyperbolic group. We also classify the finite sem
Publicado em: 2006
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5. Electron microscopic study of cell surface rings during cell division and morphogenesis of Arthrobacter crystallopoietes.
The whole cell ultrastructure during cell division and morphogenesis of Arthrobacter crystallopoietes was monitored using electron microscopic techniques. Glucose-grown spherical cells were inoculated into succinate-based medium. In this medium, the organism undergoes a morphogenetic cycle consisting of elongation of spheres to rods, exponential growth as ro
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6. Inactivation of FtsI inhibits constriction of the FtsZ cytokinetic ring and delays the assembly of FtsZ rings at potential division sites
A universally conserved event in cell division is the formation of a cytokinetic ring at the future site of division. In the bacterium Escherichia coli, this ring is formed by the essential cell division protein FtsZ. We have used immunofluorescence microscopy to show that FtsZ assembles early in the division cycle, suggesting that constriction of the FtsZ r
The National Academy of Sciences of the USA.
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7. Unique and overlapping roles for ZipA and FtsA in septal ring assembly in Escherichia coli
ZipA and FtsA are essential division proteins in Escherichia coli that are recruited to the division site by interaction with FtsZ. Utilizing a newly isolated temperature-sensitive mutation in zipA we have more fully characterized the role of ZipA. We confirmed that ZipA is not required for Z ring formation; however, we found that ZipA, like FtsA, is require
Oxford University Press.
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8. Plastid Division Is Driven by a Complex Mechanism That Involves Differential Transition of the Bacterial and Eukaryotic Division Rings
During plastid division, two structures have been detected at the division site in separate analyses. The plastid-dividing ring can be detected by transmission electron microscopy as two (or three) electron-dense rings: an outer ring on the cytosolic face of the outer envelope, occasionally a middle ring in the intermembrane space, and an inner ring on the s
American Society of Plant Biologists.
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9. The Escherichia coli Cell Division Protein FtsW Is Required To Recruit Its Cognate Transpeptidase, FtsI (PBP3), to the Division Site
The bacterial cell division protein FtsW has been suggested to perform two functions: stabilize the FtsZ cytokinetic ring, and facilitate septal peptidoglycan synthesis by the transpeptidase FtsI (penicillin-binding protein 3). We show here that depleting Escherichia coli cells of FtsW had little effect on the abundance of FtsZ rings but abrogated recruitmen
American Society for Microbiology.
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10. ON THE CONSTRUCTION OF DIVISION RINGS BY THE DEFORMATION OF FIELDS*
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11. Colocalization of Plastid Division Proteins in the Chloroplast Stromal Compartment Establishes a New Functional Relationship between FtsZ1 and FtsZ2 in Higher Plants1
Chloroplast division is driven by a macromolecular complex containing components that are positioned on the cytosolic surface of the outer envelope, the stromal surface of the inner envelope, and in the intermembrane space. The only constituents of the division apparatus identified thus far are the tubulin-like proteins FtsZ1 and FtsZ2, which colocalize to r
American Society of Plant Physiologists.
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12. Dynamic Trio: FtsZ, Plastid-Dividing, and Dynamin Rings Control Chloroplast Division
American Society of Plant Biologists.