| Registro completo |
| Provedor de dados: |
BABT
|
| País: |
Brazil
|
| Título: |
The influence of freezing rates on bovine pericardium tissue Freeze-drying
|
| Autores: |
Borgognoni,Camila Figueiredo
Tattini Junior,Virgilio
Ayrosa,Ana Maria Irene Bartolomeu
Polakiewicz,Bronislaw
Leirner,Adolfo Alberto
Maizato,Marina Junko Shiotsu
Higa,Olga Zazuco
Beppu,Marisa Masumi
Pitombo,Ronaldo Nogueira de Moraes
|
| Data: |
2009-12-01
|
| Ano: |
2009
|
| Palavras-chave: |
Freeze-drying
Freezing
Bovine pericardium
|
| Resumo: |
The bovine pericardium has been used as biomaterial in developing bioprostheses. Freeze-drying is a drying process that could be used for heart valve's preservation. The maintenance of the characteristics of the biomaterial is important for a good heart valve performance. This paper describes the initial step in the development of a bovine pericardium tissue freeze-drying to be used in heart valves. Freeze-drying involves three steps: freezing, primary drying and secondary drying. The freezing step influences the ice crystal size and, consequently, the primary and secondary drying stages. The aim of this work was to investigate the influence of freezing rates on the bovine pericardium tissue freeze-drying parameters. The glass transition temperature and the structural behaviour of the lyophilized tissues were determined as also primary and secondary drying time. The slow freezing with thermal treatment presented better results than the other freeze-drying protocols.
|
| Tipo: |
Info:eu-repo/semantics/article
|
| Idioma: |
Inglês
|
| Identificador: |
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132009000600021
|
| Editor: |
Instituto de Tecnologia do Paraná - Tecpar
|
| Relação: |
10.1590/S1516-89132009000600021
|
| Formato: |
text/html
|
| Fonte: |
Brazilian Archives of Biology and Technology v.52 n.6 2009
|
| Direitos: |
info:eu-repo/semantics/openAccess
|
