Abstract Silicification is a diagenetic process commonly observed in sedimentary sections of the Aptian carbonate deposits of the Santos Basin that involves the replacement of carbonate minerals with silica. It is mostly associated with hydrothermal fluids percolating through faults and fractures. CO2 degassing favors an increase in acidity. Consequently, the fluids became subsaturated with calcite and supersaturated with silica. Given the increase in silica content, two distinct behaviors were identified: reduction and enhancement of permoporous properties. The aim of this work is to identify permoporous alteration due to silicification in the Barra Velha Formation. To accomplish this, a qualitative analysis was conducted correlating acoustic borehole images, nuclear magnetic resonance porosity and permeability, and elemental capture spectroscopy logs were performed, followed by a quantitative analysis based on crossplot evaluation. The Barra Velha Formation was divided into three intervals with respect to silica content. The common behavior observed is permoporosity reduction associated with silica increase, but locally, permoporosity enhancement associated with silica increase was also identified. Finally, we established a direct relationship between calcite dissolution and silica precipitation, a well-defined trend characterized by sonic log (DT) reduction and density increase, and an inverse relationship between acoustic impedance and permoporous properties. Finally, the quantitative analysis also favored improving the lack of reservoir qualities of the intrusive igneous interval. fractures CO acidity Consequently content identified properties images permeability performed evaluation locally Finally precipitation welldefined well defined DT (DT interval

Abstract The formulation of alternative substrates using organic residues from agro-industrial/agricultural activities allows, in addition to reducing production costs, to reduce environmental impacts. Carnauba bagana, a residue from the extraction of wax, has great potential in the formulation of alternative substrates. However, studies using this residue as a raw material in the composition of substrates for the production of plant loofah seedlings have not yet been carried out. Thus, the present research aimed to evaluate the potential of substrates composed of different mixtures of soil and carnauba bagana in the production of plant loofah seedlings. The experiment was carried out in a greenhouse under a completely randomized design, with six treatments (0, 20, 40, 60, 80 and 100% carnauba bagana, plus soil) and four replications. According to the results obtained, it was possible to verify that the carnauba bagana can be used as a constituent of substrate for the production of plant loofah seedlings. Among the combinations tested, the mixture consisting of 50% carnauba bagana + 50% soil showed the greatest potential for use.

Resumo A formulação de substratos alternativos utilizando resíduos orgânicos provenientes de atividades agroindustriais/agropecuárias possibilitam, além da redução de custos de produção, a redução de impactos ambientais. A bagana de carnaúba, um resíduo oriundo da extração da cera, possui grande potencial na formulação de substratos alternativos. Contudo, ainda não foram realizados estudos utilizando esse resíduo como matéria-prima na composição de substratos para a produção de mudas de bucha vegetal. Assim, a presente pesquisa teve como objetivo avaliar o potencial de substratos compostos por diferentes misturas de solo e bagana de carnaúba na produção de mudas de bucha vegetal. O experimento foi conduzido em casa de vegetação sob delineamento inteiramente casualizado, com seis tratamentos (0, 20, 40, 60, 80 e 100% bagana de carnaúba, acrescido de solo) e quatro repetições. De acordo com os resultados obtidos foi possível constatar que a bagana de carnaúba, pode ser empregada como constituinte de substrato para produção de mudas de bucha vegetal. Entre as combinações testadas, a mistura constituída por 50% de bagana de carnaúba + 50% de solo foi a que apresentou maior potencial de utilização.

Toxoplasmose destaca-se como uma doença global que tem felinos como hospedeiros definitivos. No município de Natal, Rio Grande do Norte, Brasil, dois parques são notáveis por sua importância ecológica e social. Este estudo teve como objetivo investigar a presença de Toxoplasma gondii em gatos de rua, morcegos e pequenos mamíferos não-voadores nestas duas reservas ecológicas. No total, as amostras biológicas foram obtidas de 154 mamíferos, 92 animais selvagens de ambas as áreas e 62 gatos domésticos do Parque da Cidade. No total, 22 (53,7%) mamíferos silvestres não-voadores, 11 (21,5%) morcegos e 28 (52,8%) gatos foram positivos para IgG anti-T. gondii utilizando o Teste de Aglutinação Modificado (≥ 25). Foi possível detectar a presença de DNA de T. gondii, por meio de uma amplificação molecular de um fragmento do gene B1 (155bp), em 92 amostras de tecido de animais selvagens, incluindo Didelphis albiventris, Monodelphis domestica, Artibeus lituratus, Carollia perspicillata e Glossophaga soricina. Dos 62 gatos examinadas pelo mesmo método molecular, DNA de T. gondii pode ser detectado em quatro gatos. Neste estudo, observou-se a circulação de T. gondii em espécies selvagens e gatos domésticos, demonstrando o envolvimento de animais domésticos e selvagens no ciclo de T. gondii.

Toxoplasmosis stands out as a global disease that has felines as definitive hosts. In the municipality of Natal, Rio Grande do Norte State, Brazil, two parks are notable for their ecological and social importance. This study aimed to investigate the presence of Toxoplasma gondii in short hair cats, bats and small non-volant mammals in these two ecological reserves. Altogether, biological samples were obtained from 154 mammals, 92 wild animals from both areas and 62 domestic cats of the Parque da Cidade. In total, 22 (53.7%) non-volant wild mammals, 11 (21.5%) bats and 28 (52.8%) cats were positive for IgG anti-T. gondii antibodies using the Modified Agglutination Test (≥ 25). It was possible to detect the presence of T. gondii DNA, by means of a molecular amplification of a B1 gene fragment (155bp), in 92 tissue samples from wild animals, including Didelphis albiventris, Monodelphis domestica, Artibeus lituratus, Carollia perspicillata and Glossophaga soricina. Of the 62 cats examined by the same molecular method, T. gondii DNA could be detected in 4 cats. In this study, it was observed the circulation of T. gondii in wild species and domestic cats, demonstrating the involvement of wild and domestic animals in the cycle of T. gondii.