Lapachol is a natural naphthoquinone with important activity due to its chemical and structural properties. Nine semisynthetic derivatives of this substance were tested against strains of Staphylococcus spp. to identify the antimicrobial activity of these compounds. Only β-lapachone and oxime of lapachol showed good activity against the strains studied. The minimum bactericidal concentration values ranged from 62.5... Read more.
This study characterized microbial strains isolated from diesel fuel samples collected from the tank of a generating set at the Institute of Research for Development in Pointe-Noire (Congo). Two bacterial isolates (G2 and G3) were distinguished by their color on agar plates and were characterized by their API 20E biochemical profiles and by 16S rRNA gene sequencing. The phenotypic properties of these isolates were... Read more.
Litter decomposing macrofungi (LDM) and ectomycorrhiza (ECM) play vital roles in maintenance of forest ecosystem. Since these soil-litter dwelling fungi produce lignolytic enzymes, they have been proved useful in soil bioremediation. However, literature of these groups is limited and therefore it is important to record and identify them. This study reports the diversity of litter growing macrofungi in three sal (Shorea... Read more.
Helvia W. Casullo Araújo, Rosileide F. S. Andrade, Dayana Montero-Rodríguez, Vanessa Pimentel Santos, Patrícia C. V. Souza Maia, Carlos F. B. Costa Filho, Carlos A. Alves da Silva and Galba Maria Campos-Takaki
A novel bacterium pigmented isolate from Caatinga soil was characterized by biochemical and molecular assays, as well as, by rep-polymerase chain reaction (PCR) and 16S rDNA sequencing, and was identified as Serratia marcescens based on 99% of similarity. The identity of the sequences were compared by pairs of critical species of S. marcescens found in National Center for Biotechnology Information (NCBI) with a 96%... Read more.
Glucose oxidase (GOx) has several industrial applications. It is believed that there are several species of fungi that have the ability to produce this enzyme, most of which are unexplored. This work aimed to investigate the production of glucose oxidase (EC 220.127.116.11) by fungi isolated from soil samples of the Amazonian forest. Filamentous fungi were isolated from soil samples from the Adolpho Ducke Forest Reserve,... Read more.