O Whatman FTA-Card® é composto por um papel-filtro quimicamente tratado, destinado à coleta, transporte, armazenamento de amostra para posterior extração de ácidos nucléicos. A tecnologia FTA-Card® é utilizada para manter estável DNA e RNA em temperatura ambiente, podendo ser utilizada para fixação de uma ampla variedade de material orgânico ou tecidos. Foram realizados testes para certificar sua eficiência na conservação do material a ser analisado com o intuito de eliminar a cadeia fria de conservação, agilizando e diminuindo os custos da execução de exames moleculares associados ao diagnóstico de patologias. Com a utilização desse método o material biológico pode ser enviado por serviço de transportes, reduzindo os custos e viabilizando os diagnósticos provenientes de áreas mais remotas onde o tempo é um impeditivo proeminente. Foram testadas amostras de felino na forma de sangue total e soro na extração utilizou-se o kit MagaZorb® Total RNA Mini-Prep Kit (Promega, USA), para o diagnóstico realizamos a técnica de PCR em tempo real para amplificar o gene CI2 de mamíferos a fim de visualizar a eficácia na conservação de material genético.
Atrazine is a herbicide widely used in agriculture; however, because of its toxicity, alternatives are needed to remove this compound from the environment. In this study, we investigated the adsorption process and the atrazine-adsorbing ability of three biochars produced at different pyrolysis temperatures from byproducts of the wood industry. The biochars were characterized by Fourier-transform infrared spectroscopy (FTIR) and scanning electron microscopy (SEM), and their physical characteristics were evaluated by Brunauer-Emmett-Teller (BET) analysis. The biochar pyrolyzed at 350 °C (BM350) adsorbed 26.04% of the herbicide, showing the best performance among the three biochars tested, even though it had the lowest specific surface area (1.467 m 2 g-1). It also had a greater quantity of organic functional groups, which may have influenced the adsorption. The kinetics of the adsorption process were best explained by the pseudofirst-order model and by the Freundlich isotherm model. However, the biochar is not suitable for the removal of the herbicide atrazine, having a lower adsorption capacity than those of others described in the literature.
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