384 resultados para Enxerto de tecido


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The garlic (Allium sativum L.) can be naturally infected by a complex of filamentous viruses belonging to the genera Potyvirus, Carlavirus and Allexivirus. Accumulation of these viruses occurs especially by vegetative propagation through cloves. As the cultivated garlic plant does not produce true seed worldwide, virus-free plants can only be obtained by tissue culture of stem apices and thermotherapy. Using these techniques, garlic seeds were produced at the School of Agricultural Sciences - UNESP, Botucatu, and evaluated by RT-PCR for the presence of potyvirus, carlavirus and allexivirus. In the second generation of microcloves propagated in a greenhouse, 6.6% infection was detected, only by allexivirus. In the fourth generation, however, there was 60% incidence by allexivirus, 35% by potyvirus and all negative by carlavirus. The high rate of infection by allexivirus may be related to the greater difficulty of removing the species of viruses belonging to this genus, as observed by other authors, and also based on the infection and transmission of the virus by the mite, Aceria tulipae, during the storage of bulbs from one year to the other. The garlic at the fourth generation corresponds to cloves weighed less than 1 gram and not selected for commercial multiplication. Selection for the size of cloves has a positive effect on the choice of cloves with lower rates of viral infection, as the technique of thermotherapy and tissue culture do not eliminate the virus completely. Results also emphasize the need of fumigation for the garlic seed stored from one year to the other in order to prevent the transmission of allexivirus during storage.

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

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Pós-graduação em Biotecnologia Animal - FMVZ

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Pós-graduação em Odontologia - ICT

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This research objective was to verify the tissues reactions obtained, in surgical experimental bone defect, after the etil cyanoacrylate chemical adhesive application in rats parietal bones. 1t was investigated the acceptance or no acceptance of the tissues surround the bone defect in which was placed the etil cyanoacrylate and the control bone defect. The specimens were submitted to light microscopic analysis. 24 adults rats were used (Rattus norvergicus, albinus, Wistar) with the average weight to 300 gr. and were divided in two groups: treated and control. After the bone defects were realized, etil cyanoacrylate was placed over one of the defects at the parietal bone (treated group). On the other defect nothing was placed and it was used like control group. After 24 hours, 3,5,7,30 and sixty days after surgery, for animals of each group were sacrificed. The bone samples were removed and fixed in 10% formalin during 72 hours and analyzed using light microscopy. The results showed that the acute inflammatory responses was more observed at lhe treated group than the control group. The chemical adhesive was observed until 60 days follow the surgery and the tissues around it present normal appearance. The chemical adhesive, etil cyanaocrylate, did not impede at the bone repair process

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

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The aim of this study was to evaluate the influence of the bed in High Density Porous Polyethylene (Medpor) implants integration. Two different kind of beds -- corticalized and decorticalized -- were made in six dogs. The animals were killed thirty, sixty and ninety days after implantation. Blocks including implant and adjacent bone were harvested, submitted to histological procedures, stained in hematoxiline-eosine and analyzed in optic microscope. The results demonstrated an absence of infection and foreign body reaction associated with High Density Porous Polyethylene (Medpor) implants. Furthermore, bony and fibrovascular ingrowth could be observed into its pores. The best integration was noted in decorticalized group, in which occurred a greater bony and fibrovascular ingrowth in comparison to the corticalized group

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Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

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Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

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Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)