Screening and evaluation of herbicidal metabolites produced by Trichoderma spp.
Laboratory bioassays were conducted to screen and evaluate the potential herbicidal metabolites produced by Trichoderma.longibrachiatum (Tr673), T. harzianum (Tr319), T. viride (Tr347) T. koningii (Tr324) and T. asperellum (Tr85) on inhibiting seed germination (SGe) and shoot/root growth (SGr/RGr) of seedlings of Porslane (Portulaca oleracea), Barnyardgrass (Echinochloa crus-galli), and Amaranthus retroflexus L. The...
Nutritional characteristics of marandu grass (Brachiaria brizantha cv. marandu) subjected to inoculation with associative diazotrophic bacteria
Due to the search for viable and cost-effective ways to provide nitrogen for forage grasses, inoculation with diazotrophs presents high potential as an alternative to plant nutrition by reducing the use of nitrogen fertilizers. The objective of this work was to evaluate the nutrition of marandu grass (Brachiaria brizantha cv. marandu) subjected to inoculation with associative diazotrophic bacteria grown in Cerrado soil...
Serotyping and molecular typing of Salmonella species isolated from wastewater in Nsukka, Nigeria
The objective of this investigation was to isolate and identify Salmonella serovars present in wastewater from the University of Nigeria, Nsukka (UNN) wastewater treatment plant and to evaluate the sensitivity and precision of different microbial typing methods (conventional and molecular), in identifying and characterizing Salmonella species. A total of 100 suspected Salmonella colonies on selective media...
Reduction of organic contaminants and microbial communities in bioecological wastewater treatment system
Wastewater treatment is a key factor in controlling eutrophication of freshwater bodies. Nutrients discharge in wastewater can cause water quality problems such as eutrophication of freshwater bodies, decreased conservation and recreational value of water systems, and destruction of aquatic life. A pilot scale bioecological wastewater treatment system which consisted of a modified anaerobic\anoxic\oxic (A2O) system as a...
Reconstructed H3N2 influenza virus predicted from influenza vaccine strains improved cross-protective immunity in mice
Hemagglutinin (HA) protein of influenza virus is a core antigen protein which induces protective antibody in hosts. But HA genes mutate rapidly. Every year, World Health Organization (WHO) selects representative influenza virus strains from the influenza centers worldwide for virus vaccine production. So, the selected influenza vaccine strains, can partly respond to antigen drifts of circulating influenza virus,...
Detection of virulence and antibiotic resistance genes in environmental strains of Vibrio spp. from mussels along the coast of Rio de Janeiro State, Brazil
Mussels have a filter system enabling them to take up nutrients from the water, so a microbiological analysis of these bivalve mollusks can show the contamination levels of their surrounding aquatic environment. The present work aimed to isolate Vibrio species from two hundred samples of mussels (Perna perna) incrusted on rocks of the Santana Archipelago and from longline mariculture in Ilha Grande Bay in Angra dos...