| Journal: | Materials research |
| Database: | PERIÓDICA |
| System number: | 000312974 |
| ISSN: | 1516-1439 |
| Authors: | Tattini-Junior, Virgilio1 Polakiewicz, Bronislaw Pitombo, Ronaldo Nogueira de Moraes Matos, Jivaldo do Rosario2 |
| Institutions: | 1Universidade de Sao Paulo, Escola de Ciencias Farmaceuticas, Sao Paulo. Brasil 2Universidade de Sao Paulo, Instituto de Quimica, Sao Paulo. Brasil |
| Year: | 2007 |
| Season: | Ene-Mar |
| Volumen: | 10 |
| Number: | 1 |
| Pages: | 1-4 |
| Country: | Brasil |
| Language: | Inglés |
| Document type: | Nota breve o noticia |
| Approach: | Experimental |
| English abstract | Bovine pericardium bioprosthesis has become a commonly accepted device for heart valve replacement. Present practice relies on the measurement of shrinkage temperature, observed as a dramatic shortening of tissue length. Several reports in the last decade have utilized differential scanning calorimetry (DSC) as an alternative method to determine the shrinkage temperature, which is accompanied by the absorption of heat, giving rise to an endothermic peak over the shrinkage temperature range of biological tissues. Usually, freeze-drying microscope is used to determine collapse temperature during the lyophilization of solutions. On this experiment we used this technique to study the shrinkage event. The aim of this work was to compare the results of shrinkage temperature obtained by DSC with the results obtained by freeze-drying microscopy. The results showed that both techniques provided excellent sensitivity and reproducibility, and gave information on the thermal shrinkage transition via the thermodynamical parameters inherent of each method |
| Disciplines: | Ingeniería, Medicina veterinaria y zootecnia |
| Keyword: | Ingeniería de materiales, Medicina veterinaria, Pericardio bovino, Biomateriales, Temperatura, Calorimetría diferencial de barrido |
| Keyword: | Engineering, Veterinary medicine and animal husbandry, Materials engineering, Veterinary medicine, Bovine pericardium, Biomaterials, Temperature, Differential scanning calorimetry |
| Full text: | Texto completo (Ver HTML) |
