Aspergillus niger is an important microorganism that has been used for decades to produce extracellular enzymes. In this study, a novel Aspergillus niger strain integrated with a eukaryotic expression vector harboring the gpd-Shi promoter of shiitake mushrooms and cellulase gene of Ampullaria gigas Spix was engineered to improve cellulase production for the achievement of highly efficient sacch...

The growth of the filamentous fungus Aspergillus niger, a common food spoilage organism, is inhibited by the weak acid preservative sorbic acid (trans-trans-2,4-hexadienoic acid). Conidia inoculated at 10(5)/ml of medium showed a sorbic acid MIC of 4.5 mM at pH 4.0, whereas the MIC for the amount of mycelia at 24 h developed from the same spore inoculum was threefold lower. The MIC for conidia ...

Modified solid-state fermentation (MSSF) of tannin-rich substrates for production of tannase and gallic acid was carried out using fungal co-cultures. Tannin acyl hydrolase or tannase is an enzyme produced extracellularly in solid state fermentation by various fungi. The solid-state fermentation offers a number of advantages over submerged and liquid conventional fermentation for the enzyme pro...

Ants often form mutualistic interactions with aphids, soliciting honeydew in return for protective services. Under certain circumstances, however, ants will prey upon aphids. In addition, in the presence of ants aphids may increase the quantity or quality of honeydew produced, which is costly. Through these mechanisms, ant attendance can reduce aphid colony growth rates. However, it is unknown ...

OBJECTIVE To investigate the use of 405 nm light for inhibiting the growth of selected species of dermatophytic and saprophytic fungi. BACKGROUND DATA The increasing incidence and resilience of dermatophytic fungal infections is a major issue, and alternative treatment methods are being sought. METHODS The sensitivity of the dermatophytic fungi Trichophyton rubrum and Trichophyton mentagrop...

Three different Aspergillus Niger MTCC strains (872, 1785 and 2208) were used for the production of chitosan. Multivariate growth mediums in varying incubation periods were analyzed for the production. The produced chitosan was characterized by its physical appearance, moisture content (by means of gravimetric method), percentage of ash and solubility (through the Association of Official Agricu...

three different aspergillus niger mtcc strains (872, 1785 and 2208) were used for the production of chitosan. multivariate growth mediums in varying incubation periods were analyzed for the production. the produced chitosan was characterized by its physical appearance, moisture content (by means of gravimetric method), percentage of ash and solubility (through the association of official agricu...

Microbial contamination of the surface building materials and subsequent release microbial particles into air can significantly affect indoor quality. Avoiding development or, at least, reducing quantity microorganisms growing on is a key point to reduce health risks for occupiers. In that context, antimicrobial activity TiO2, ZnO Au/ZnO was assessed by measuring log reductions Escherichia coli...