Chapter 2 - Discretizing our model of flow in porous media
2.3 Two point flux approximation scheme
Em conclusão, esse estudo fornece evidências de que modelo experimental de
hipertensão com ratos tratados com alto teor de frutose associado à sobrecarga de sal na
dieta exibe RI/hiperinsulinemia resultando em retenção de sal. Isso foi consistente com dados
da literatura que discutem o papel chave da insulina na regulação do metabolismo do sódio e
na pressão sanguínea. Coletivamente os dados também indicam aumento do estresse
oxidativo na desordem metabólica encontrada em combinação à elevação da PA, enquanto
tempol administrado cronicamente exerce efeito antihipertensivo, demonstrando, assim,
participação crucial de radicais O2•− na patogênese do estresse oxidativo com alteração dos
valores pressóricos nos animais do estudo. O modelo usado recapitula muitos dos efeitos
bioquímicos e fisiológicos que marcam tendências dietéticas atuais. A implicação é que a
exposição contínua a esses refinados, dietas de baixa qualidade, tem o potencial de resultar
em efeitos adversos para a saúde que podem, em parte, explicar o aumento exponencial dos
fatores de risco para as DCVs. Os resultados também denotam a importância de uma dieta
nutricionalmente equilibrada e confirmam a associação do estresse oxidativo nos vários
fatores envolvidos no desenvolvimento da RI com a presença de hipertensão. Assim, o estudo
oferece um paradigma nutricional em que aspectos estudados podem ser úteis e
cuidadosamente explorados para iniciativas de reduzirem tanto a quantidade de sal quanto
de frutose (provinda de sacarose ou de bebidas adoçadas com HFCS) como atualmente está
sendo vastamente consumida. Uma compreensão mais completa de como essa dieta
empregada afeta os mecanismos que causam insulto cardiovascular pode auxiliar na
prevenção de doenças com novas estratégias terapêuticas para combaterem a progressão
dessas condições.
78
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In document
Comparison of Iterative Solvers for Non-Symmetric Linear Systems in Porous Media Problems
(sider 16-0)