Anionic Collagen
Mostrando 13-22 de 22 artigos, teses e dissertações.
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13. Compósito de colágeno com silicato e hidroxiapatita como material para endodontia / Collagen composite with silicate and hydroxyapatite as material for endodontic applications
In this work was prepared and characterized collagen composites with silicate and hydroxyapatite for pulp capping; post pulpotomy usage, as endodontic material. Even though materials for this purpose are available, in most case they suffer degradation in the repair zone when. Was used type I collagen in the form anionic mixed with silicate (white Portland ce
Publicado em: 2005
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14. Avaliação "in vitro" dos processos de proliferação e diferenciação de celulas osteoblasticas e a mineralização sobre matrizes anionicas de colageno para reparo osseo
Collagen has been extensively described as an important material in bone tissue engineering due to its biocompatibility, biodegradability, low antigenicity, and high tensile strength. However, collagen scaffolds in their pure form have some drawbacks and improvements in its physical, chemical and biological properties are necessary to overcome those inadequa
Publicado em: 2005
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15. Matrizes tridimensionais de colágeno aniônico: elastina como suporte para reconstrução de tecidos moles: um estudo da integração matriz:tecido / Tridimentional collagen:elastin matrices as scaffold for soft tissue reconstruction: matrix:tissue integration study
Este trabalho visou estudar a integração de implantes de colágeno aniônico:elastina obtidos a partir de pericárdio bovino acelularizado e com densidade de carga negativa variável. As cargas negativas foram introduzidas na forma de grupos carboxílicos, por hidrólise seletiva e controlada de grupos carboxamidas de asparagina e glutamina contidos na est
Publicado em: 2005
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16. Anionic collagen : rhamsan composites as injectable biomateriais : characterization and interaction mechanism / Compósitos colágeno aniônico : ramsana como biomateriais injetáveis : caracterização e mecanismo de interação
This work describes the preparation, characterization and mechanisms of interaction anionic collagen:rhamsam composites, with the purpose of developing injectable gels for plastic corrections with similar concentrations to the commercially founded without the use of glutaraldehyde. The materials were characterized by electrophoresis, infrared spectroscopy, t
Publicado em: 2003
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17. Diaphyseal Bone Defects in Sheep with Anionic Collagen Filling / Preenchimento de falhas ósseas diafisárias em ovelhas com colágeno aniônico
As falhas ósseas ainda são uma grande desafio na ortopedia e diversos materiais alternativos de natureza sintética ou natural são desenvolvidos para suprir essa lacuna e substituir osso autógeno que aumenta o morbidade do tratamento, principalmente quando existe grande demanda de perda óssea. Este trabalho descreve a utilização de matriz tridimension
Publicado em: 2003
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18. Estudo de biocompatibilidade de matrizes de colágeno aniônico para reparo de defeitos ósseos. / Biocompatibility of anionic collagen matrices as scaffold for bone healing.
Objetivo: Avaliar as modificações estruturais do pericárdio bovino após hidrólise seletiva de grupos carboxiamidas em carboxílicos e resposta biológica em defeitos ósseos reparados com as matrizes de colágeno aniônico. Material e métodos: Amostras das matrizes modificadas foram comparadas com amostras de pericárdio bovino nativo através de micro
Publicado em: 2000
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19. Inhibition of collagen-induced platelet aggregation by normal plasma
Normal plasma has been found to inhibit the platelet aggregation-inducing effect of collagen in a time consuming reaction independent of temperature. Collagen treated with serum and washed has reduced reactivity which can be restored to normal by treatment with 1.5 M sodium chloride. On the basis of this result, it is suggested that inhibition results from a
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20. T-cell activation molecule 4-1BB binds to extracellular matrix proteins.
The recently isolated 4-1BB cDNA clone encodes a cell surface protein expressed by activated T cells. Its extracellular domain is homologous to members of the nerve growth factor receptor super family and its cytoplasmic domain contains a sequence homologous to the binding site for the T-cell-specific tyrosine kinase p56lck found in the cytoplasmic domains o
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21. Protease-activated receptor 1 is the primary mediator of thrombin-stimulated platelet procoagulant activity
The activation of human platelets by thrombin is mediated primarily by protease-activated receptors (PARs). PAR1 and PAR4 are present on human platelets and are activated by the hexapeptides SFLLRN and GYPGQV, respectively. To further characterize the involvement of PAR1 and PAR4 in platelet activation, the ability of SFLLRN or GYPGQV to generate annexin V b
The National Academy of Sciences.
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22. Direct identification of the calcium-binding amino acid, gamma-carboxyglutamate, in mineralized tissue.
A direct approach has been developed for quantitative identification of the calcium-binding amino acid, gamma-carboxyglutamate, in proteins. This should be advantageous for the study of numerous systems where specific roles for the binding of calcium or other divalent cations are suspected. Investigation of mineralized tissue, where calcium-binding proteins