Step Nc
Mostrando 1-12 de 24 artigos, teses e dissertações.
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1. Coronal microleakage of endodontically treated teeth with intracanal post exposed to fresh human saliva
OBJECTIVE: The aim of this study was to investigate the coronal microleakage of endodontically treated teeth prepared to receive an intracanal post and teeth with an intracanal post but without a prosthetic crown and exposed to contamination by fresh human saliva. MATERIAL AND METHODS: A mechanical-chemical preparation following the step-back technique wa
J. Appl. Oral Sci.. Publicado em: 2013-09
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2. Projeto e implementação de um controlador numérico computadorizado aberto baseado em STEP-NC
No trabalho desenvolvido foi utilizada a Norma ISO 14649 (STEP-NC) que é o novo parão para interface de dados de manufatura entre os sistemas CAM/CNC. Atualmente a oca dessas informações é feita usando a linguagem da Norma 1S06983, conhecida como ódigo-G/M. Isto significa que partes das informações geradas no ciclo de Desenvolvimento, notadamente a g
Publicado em: 2009
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3. The influence of different resin dental adhesive systems applied to human dentine in the face of an in vitro bacterial cariogenic challenge, in vitro / Influência de diferentes sistemas adesivos dentários resinosos aplicados em dentina humana frente a um desafio cariogênico bacteriano, in vitro
The aim of this study was to evaluate the in vitro behavior of three dental adhesive systems (DAS), namely the two self etching Clearfil SE Bond Kuraray Co (CSEB) and Xeno III Dentsply (X-III) as well as the three-step etch and rinse Multi-Purpose Plus 3M ESPE (SBMP), concerning the inhibition of secondary dentine caries in the face of a bacterial cariogenic
Publicado em: 2008
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4. Domains upstream of the protease (PR) in human immunodeficiency virus type 1 Gag-Pol influence PR autoprocessing.
A critical step in the formation of infectious retroviral particles is the activation of the virally encoded protease (PR) and its release from the Gag-Pol precursor polyprotein. To identify factors that influence this step, the maturation of human immunodeficiency virus type 1 PR from various Gag-PR polyproteins was assayed in vitro by a using rabbit reticu
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5. Zinc finger-dependent HIV-1 nucleocapsid protein–TAR RNA interactions
In the minus-strand transfer step of HIV-1 reverse transcription, the nucleocapsid protein (NC) promotes annealing of the 3′ ‘R’ (repeat) region of the RNA genome to its complementary sequence located in the newly synthesized minus-strand strong-stop DNA. The R region contains the highly stable transactivation response (TAR) RNA hairpin. To gain insigh
Oxford University Press.
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6. Induction of neural crest in Xenopus by transcription factor AP2α
We report experiments with Xenopus laevis, using both intact embryos and ectodermal explants, showing that the transcription factor AP2α is positively regulated by bone morphogenetic protein (BMP) and Wnt signaling, and that this activation is an essential step in the induction of neural crest (NC). Ectopic expression of AP2α is sufficient to activate high
The National Academy of Sciences.
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7. Relationships Among Virus Spread, Cytopathogenicity, and Virulence as Revealed by the Noncytopathic Mutants of Newcastle Disease Virus
We have studied protein synthesis in cultured cells infected with the six noncytopathic (nc) mutants of the Australia-Victoria strain (AV-WT) of Newcastle disease virus and their plaque-forming revertants. Virus-specific polypeptides accumulated at 30 to 63% of wild-type levels in nc mutant-infected cells and between 66 and 175% of wild-type levels in revert
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8. Intra-tRNA distance measurements for nucleocapsid proteindependent tRNA unwinding during priming of HIV reverse transcription
We report here the direct measurement of intra-tRNA distances during annealing of the tRNA primer to the HIV RNA genome. This key step in the initiation of retroviral reverse transcription involves hybridization of one strand of the acceptor arm of a specific lysine tRNA to the primer binding site on the RNA genome. Although the mechanism of tRNA unwinding a
The National Academy of Sciences.
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9. Repair of deoxyribonucleic acid in ultraviolet light-sensitive and -resistant Dictyostelium discoideum strains.
Some responses of the cellular slime mold Dictyostelium discoideum to ultraviolet light (UV) irradiation were investigated by analyzing two aspects of deoxyribonucleic acid (DNA) excision repair in the vegetative cells: (i) the fate of thymine-containing dimers and (ii) the production and rejoining of single-strand breaks. Experiments were done with the pare
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10. A Conformation-Specific Monoclonal Antibody Reacting with Fusion-Active gp41 from the Human Immunodeficiency Virus Type 1 Envelope Glycoprotein
The gp41 subunit of the human immunodeficiency virus type 1 (HIV-1) envelope glycoprotein plays a major role in the membrane fusion step of viral infection. The ectodomain of gp41 contains a six-helix structural domain that likely represents the core of the fusion-active conformation of the molecule. A monoclonal antibody (MAb), designated NC-1, was generate
American Society for Microbiology.
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11. Structural Basis for Coevolution of a Human Immunodeficiency Virus Type 1 Nucleocapsid-p1 Cleavage Site with a V82A Drug-Resistant Mutation in Viral Protease
Maturation of human immunodeficiency virus (HIV) depends on the processing of Gag and Pol polyproteins by the viral protease, making this enzyme a prime target for anti-HIV therapy. Among the protease substrates, the nucleocapsid-p1 (NC-p1) sequence is the least homologous, and its cleavage is the rate-determining step in viral maturation. In the other subst
American Society for Microbiology.
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12. Structure of a fast kinesin: implications for ATPase mechanism and interactions with microtubules
We determined the crystal structure of the motor domain of the fast fungal kinesin from Neurospora crassa (NcKin). The structure has several unique features. (i) Loop 11 in the switch 2 region is ordered and enables one to describe the complete nucleotide-binding pocket, including three inter-switch salt bridges between switch 1 and 2. (ii) Loop 9 in the s
Oxford University Press.