Nuclear Organization
Mostrando 13-24 de 425 artigos, teses e dissertações.
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13. Retinol-induced changes in the phosphorylation levels of histones and high mobility group proteins from sertoli cells
Chromatin proteins play a role in the organization and functions of DNA. Covalent modifications of nuclear proteins modulate their interactions with DNA sequences and are probably one of the multiple factors involved in the process of switch on/off transcriptionally active regions of DNA. Histones and high mobility group proteins (HMG) are subject to many co
Publicado em: 2010
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14. The information records of the documentary systems: a discussion in the field of Descriptive Representation / Os registros de informação dos sistemas documentários: uma discussão no âmbito da Representação Descritiva
Information Organization involves the processes necessary to the construction and management of documentary systems from an informational point of view. Inside Information Organization, we find Descriptive Representation, which is focused on documentary systems information records and their access points, in their relation to aspects of formal description. I
Publicado em: 2009
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15. Novo material híbrido nanoestruturado constituído de cloreto de amoniopropil silsesquioxano e sílica
In this study it was used the sol-gel method to obtain a set of silica based hybrid material samples, containing the cationic amoniumpropyl group bonded to the matrix in a pendant way. The set of samples was characterized using X-ray diffraction, transmission electron microscopy, 29Si nuclear magnetic resonance, small angle X-ray scattering, thermogravimetri
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 2009
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16. Efeito da varicocele na função dos espermatozóides. / Effect of varicocele on sperm function.
Objectives: to assess the effect of varicocele on sperm nuclear DNA integrity, mitochondrial activity, lipid peroxidation and acrosome integrity. Methods: semen samples were obtained and analyzed according to the World Health Organization guidelines (1999) and sperm morphology was evaluated by Krugers strict criteria (1986). The study group included 30 men w
Publicado em: 2009
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17. Safety culture: an exploratory study in an organization with the OHSAS occupational health and safety management system / Cultura de segurança: estudo exploratório em organização com sistema OHSAS de gestão da saúde e segurança do trabalho
Este trabalho diz respeito a organizações de alto risco de acidente, que, apesar de terem sistema de gestão de saúde e segurança do trabalho (SGSST) implementado, continuam a ter acidentes. Pesquisadores do problema particularmente do setor nuclear concluíram que as origens dos acidentes estão menos em falhas técnicas do que em falhas organizacionais
Publicado em: 2009
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18. Estudo da tenacificação do poliestireno com elastômeros butadiênicos / Polystyrene toughening by butadiene elastomers
This Dissertation describes a study about the toughening of polystyrene with different types of polybutadiene (high-cis, low-cis and styrene - butadiene diblock or triblock copolymers). These materials (High Impact of PolyStyrene HIPS) were performed by melt blending. The mechanical properties (hardness, tensile strength and impact strength); morphology and
Publicado em: 2009
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19. Evaluation of PHB/Clay nanocomposite by spin-lattice relaxation time
Poly(3-hydroxybutyrate) (PHB) based on nanocomposites containing different amounts of a commercial organically modified clay (viscogel B7) were prepared employing solution intercalation method. Three solvents, such as: CHCl3, dimethylchloride (DMC) and tetrahydrofuran (THF) were used. The relationship among the processing conditions; molecular structure and
Materials Research. Publicado em: 2008-12
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20. Chromatin supraorganization and extensibility, and nuclear composition in mouse cells / Supraorganização e extensibilidade da cromatina, e composição nuclear em celulas de camundongo
Aging may be defined as the changes that take place in an organism with time. This process, in biology, is called senescence. Cellular senescence is observed in isolated cells, and has been studied typically in cultured cells, but its occurrence in vivo has been shown only in some mammalian tissues. Chromatin changes that take place with cellular senescence
Publicado em: 2008
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21. Molecular dynamics at Trypanosoma cruzi nucleus. / Dinâmica molecular no núcleo de Trypanosoma cruzi.
In Trypanosoma cruzi the replication sites are located at nuclear periphery. In order to analyse the dynamics of molecules involved in replication, Orc/Cdc6 was used as a marker of pre-replication machinery and PCNA as a marker of replication machinery during the cell cycle of epimastigote form. Both molecules presented two nuclear patterns: dispersed patter
Publicado em: 2008
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22. O modelo do sistema viável na concepção da arquitetura de sistemas de informação: aplicação no contexto de incidentes em instalação de pesquisa na área nuclear. / The Viable System Model (VSM) in the conception of information system architectures - an application in the context of incidents for a research nuclear installation.
The present work presents a study aiming to verify the applicability of the Viable System Model (VSM) in a robust architecture for an Information System targeting nuclear naval area. The emphasis of the study is in assessing an alternative modeling for the Information System (IS) architecture specification, incorporating a set of functionalities defined by t
Publicado em: 2008
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23. Estudos funcionais e estruturais da proteina humana hnRNP Q/NSAP1 / Funcional and structural studies of human protein hnRNPQ
The members of the hnRNPs family (heterogenous nuclear ribonuclein proteins) play important roles in gene expression control and mRNAs metabolism. The proteins hnRNPD (AUF1) and hnRNPQ (NSAP1) were the main targets of this study. AUF1 has two RNA recognition motifs (RRM) and participates in the process of destabilization of a class of mRNAs that contain AU-r
Publicado em: 2008
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24. O agroturismo em Santa Rosa de Lima: transformações sócioculturais na dinâmica de organização do trabalho nas famílias agricultoras
This dissertation addresses issues related to Agritourism and the farming families belonging to the Associação dos Agricultores Ecológicos da Encosta da Serra Geral (AGRECO) the Association of Ecological Farmers of the Serra Geral Mountains, and the Associação de Agroturismo Acolhida na Colônia (AAAC) an association which promotes Agritourism on farms,
Publicado em: 2008