December 2014

Synergistic interaction of extracts of garlic (Allium sativum) and propolis against methicillin-resistant Staphylococcus aureus

Methicillin-resistant Staphylococcus aureus (MRSA) is a public health problem, being a cause of severe diseases in hospitals and communities in general. To confront this contingency at present, the effectiveness, in combination with diverse natural products is being studied in order to inhibit this microorganism. The objective of the present work was to evaluate the combined inhibitory effects of ethanolic extracts of...

Author(s): Francisco Javier Moreno-Cruz, Maribel Cervantes-Flores, Olga Dania López-Guzmán, Ángel Antonio Vertiz- Hernández, Rogelio Eduardo Ceniceros-Medina and Eduardo Lozano-Guzmán

December 2014

Diversity of hydrolytic enzymes in haloarchaea isolated from Algerian sabkhas

Algeria has numerous natural hypersaline environments (sabkha and chott) located in the north and south of the country. In the course of screening microorganisms form these environments, we isolated and characterized 44 haloarchaeal strains. According to their phenotypic characteristics and comparative 16S rRNA sequence analysis, all the isolates belonged to the family Halobacteriaceae including members related to...

Author(s): Karima Kharroub, Mohamed Amine Gomri, Margarita Aguilera and Mercedes Monteoliva-Sánchez

December 2014

Screening of Piper hispidum endophytic fungi that produce terpenes and antibacterial substances

The plant species Piper hispidum has extensive economic potential due to the production of safrole, a component of its essential oil with proven antimicrobial and insecticidal activity. One strategy for obtaining bioactive compounds through extraction from plant species is by using endophytic microorganisms, since they can produce the same substances synthesized by the host. Therefore, this study aimed to isolate fungal...

Author(s): Rafael Lopes e Oliveira, Sergio Duvoisin Junior and Patrícia Melchionna Albuquerque,

December 2014

Fibrolytic enzyme production of Myceliophthora thermophila M.7.7. using inexpensive carbon sources and mineral nutrients

This study investigated the effect of inexpensive carbon and nitrogen sources on enzyme production by Myceliophthora thermophila M.7.7 in solid-state fermentation. Three kinds of lignocellulosic waste (corn straw, sugarcane bagasse and sugarcane straw) and six nitrogen sources (urea, calcium nitrate, analytical ammonium sulphate, yeast extract, agricultural fertilizer NPK 20-05-20 and fertilizing grade ammonium...

Author(s): Marcia Maria de Souza Moretti, Emily Colferai Bonfá, Maria Cecília Maia Chierotti, Ariane Priscila Movio, Roberto da Silva and Eleni Gomes

December 2014

Biotechnological potential of actinobacteria isolated from rhizosphere of the medicinal plant, Ipomoea pes-caprae (L.) R. Br.

The aim of the present study was to evaluate the antimicrobial activity and the production of L-asparaginase by actinobacteria isolated from the rhizosphere of the medicinal plant, Ipomoea pes-caprae (L.) R. Br., and to conduct a comparative chemical characterization of the methanolic extract from leaves and the most active micro-organism. After isolation, the antimicrobial activity of actinobacteria from rhizosphere...

Author(s): Ivana Gláucia Barroso Cunha, Aline Dayse da Silva, Alex Lucena de Vasconcelos, Karina Perrelli Randau, Luís Cláudio Nascimento da Silva, Janete Magali de Araújo and Elba Lúcia Cavalcanti Amorim