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The present invention describes a method for transforming chemolithotrophic acidophilic bacteria using electroporation technology. The proposed method allows transforming a bacterial line using a transformation vector, the pAF vector, which contains an origin of vegetative replication that allows the vector to replicate inside the bacteria without altering the natural physiological functions of the latter. Also disclosed is the use of the bacteria modified according to the invention in bioleaching processes of sulphated copper, gold, uranium, nickel, zinc and cobalt ore, inter alia.

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Daniel Precioso aborda nesta obra os mecanismos e as artimanhas forjados pelos pardos da Capitania de Minas Gerais, ou mais precisamente da Vila Rica do final do século XVIII, para serem visto como iguais aos membros considerados cidadãos naquela sociedade que emergiu abrupta e violentamente das riquezas do ouro e tentou conservar os critérios de hierarquização da sociedade colonial ibérica. Segundo Precioso, em especial em Vila Rica, conviveram pessoas de costumes, valores e crenças distintas, e os processos múltiplos de miscigenação, hibridação e mestiçagem, não apenas do ponto de vista biológico, mas também cultural, engendraram uma sociedade complexa e multifacetada, cuja ampla camada de forros e mulatos fez-se presente desde cedo. O autor busca analisar de que maneira os homens pardos da Confraria de São José de Vila Rica procuraram distinguir-se socialmente dos demais homens livres não brancos naquele período, por meio do desempenho de atividades religiosas, militares, artísticas e artesanais. Foca também as penosas negociações dos pardos com as autoridades locais e ultramarinas para um melhor arranjo do grupo na escala social.

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In this work, a sensor was built up with smart material based on polymer brush and gold nanoparticles. The modified electrode functionalized with polyacrylic acid (PAA) tethered to indium tin oxide (ITO) and covered with gold nanoparticle (ITO/PAA/Au) demonstrated switchable interfacial properties discriminating different pHs. The switchable electrochemical and plasmonic process was characterized by cyclic voltammetry (CV), electrochemistry impedance spectroscopy (EIS), and localized surface plasmon resonance (LSPR).

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

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INTRODUCTION: Anabolic androgenic steroids (AAS) are frequently used by people whose aim to increase muscle mass to obtain a better performance in sports or improve physical appearance. AAS are synthetic derivatives of testosterone, able to promote muscle fibers hypertrophy, increasing intracellular protein synthesis. L-carnitine is a food supplement used to increase energetic production by means of fat acids oxidation. Although there are several works about physiological properties of these drugs, there are few studies about their mutagenic potential. OBJECTIVES: This work evaluated the clastogenicity and genotoxicity of nandrolone decanoate, testosterone decanoate and L-carnitine, in different treatments through the micronucleus test in polychromatic erythrocytes of Wistar rats. METHODS: The animals were submitted to different concentrations and associations of AAS. The positive control received cyclophosphamide 50 mg/kg by intraperitoneal injection and negative control, one ml of saline solution by gavage. The rats were sacrificed after 36 hours of latest application, having the femurs removed and the bone marrow extracted. Material was homogenized and centrifuged. Button cell was pipetted and transferred to slides, which were stained by Giemsa. 1,000 polychromatic erythrocytes were counted per animal, noting the frequency of micronuclei. RESULTS: The Kruskal-Wallis test was performed, with a significance level of 5%, which demonstrated that nandrolone decanoate - three doses of 0,2 mg/kg and 0,6 mg/kg, eight doses of 7,5 mg/kg, L-carnitine - seven doses of 0,4 ml/250 g and 1,5 ml/250 g, testosterone decanoate - 28 doses of 0,075 mg/kg, nandrolone decanoate - eight doses of 7,5 mg/kg associated to L-carnitine and 1 mL and nandrolone decanoate - eight doses of 7,5 mg/kg associated to testosterone decanoate - eight doses of 7,5 mg/kg, showed mutagenic potential. CONCLUSION: The treatments proved to be clastogenic, not being indicated like ergogenic aid.

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

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Pós-graduação em História - FCHS

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)