Growth and Fatty Acid Profile of the Aspergillus terreus in Different Culture Media and Temperatures

Fungi are a promising alternative source of oil to produce biodiesel, still very little known. The identification of a species with desirable characteristics is a fundamental component to achieve the economic viability of the process. The study aimed to carry out the evaluation of the fungus Aspergillus terreus in different culture media and different temperatures, the production of fungal biomass and in line with obtaining the profile of methyl esters of fatty acids. The fungal biomass revealed that in the NBRIP medium at both a temperature of 29 ºC and 36 ºC, it resulted in a great potential in the production of saturated fatty acids (SFA), which have excellent combustion properties, reaching values of 35.89 and 34,89%, respectively. For most species, the fuel would need to be mixed to make up culture conditions to be optimized and achieve the correct lipid profile, so that the fungal fuel meets European biodiesel production standards (EN 14214). Aspergillus terreus from iron ore tailings proved to be a promising microbial biomass as an energy source in the production of biodiesel.

Study of the antibacterial properties of a composition based on chitosan obtained from dead bees Apis Mellifera

The article provides data on the development of a new thickening composition for printing cotton-lye fabric with antibacterial properties based on biodegradable polymers Chitosan synthesized from Apis Mellifera bee dead with CMC with addition of CMC and synthetic hydrolyzed acrylic emulsion. Studied the fungicidal properties of the developed mixed thickener for active dyes used in printing fabrics. As a result of observations, it was revealed that these new thickeners on the basis of exhibit pronounced antimicrobial activity in relation to the micelle fungus Aspergillus terreus. The optical density of the samples shows that these thickeners are resistant to mycelial fungi. Among thickeners, thickeners based on Uzhitan-?MS-HAE, Uzkhitan-CMS have the most pronounced bactericidal activity, and these thickeners are more stable, they can be used the next day and even on the second day for printing mixed fabrics.

Study of the antibacterial properties of a composition based on chitosan obtained from dead bees Apis Mellifera

The article provides data on the development of a new thickening composition for printing cotton-lye fabric with antibacterial properties based on biodegradable polymers Chitosan synthesized from Apis Mellifera bee dead with CMC with addition of CMC and synthetic hydrolyzed acrylic emulsion. Studied the fungicidal properties of the developed mixed thickener for active dyes used in printing fabrics. As a result of observations, it was revealed that these new thickeners on the basis of exhibit pronounced antimicrobial activity in relation to the micelle fungus Aspergillus terreus. The optical density of the samples shows that these thickeners are resistant to mycelial fungi. Among thickeners, thickeners based on Uzhitan-?MS-HAE, Uzkhitan-CMS have the most pronounced bactericidal activity, and these thickeners are more stable, they can be used the next day and even on the second day for printing mixed fabrics.

Echinocandins and their Activity against Aspergillus terreus Species Complex: A Novel Agar Screening Method

We evaluated the newly proposed agar-screening method for echinocandin susceptibility testing of 144 Aspergillus section Terrei isolates in comparison with Etest®. Both methods defined the isolates to be wild type strains for anidulafungin and micafungin, with Etest® minimal effective concentrations (MECs) being ≤0.004 mg/L. For caspofungin, the novel agar-screening method identified 37 isolates to be caspofungin non-wild type based on their fluffy colony appearance on caspofungin agar. Etest® MECs for caspofungin for these isolates scattered widely from 0.002 to 0.750 mg/L, showing only partial accordance between the two methods.

Avaliação do potencial de solubilização de fósforo pelo Aspergillus terreus

A biossolubilização é uma das tecnologias mais inovadora e promissora utilizada na recuperação de solos, totalmente aplicável aos rejeitos de mineração, apesar da imensa incapacidade das mineradoras de alcançarem a totalidade no aproveitamento de seus minerais, devido a métodos considerados falíveis no processo de mineração. Eeste estudo vislumbrou a possibilidade da aplicação da solubilização do fósforo presente no rejeito do minério de ferro pelo Aspergillus terreus. Os ensaios analíticos propostos no estudo indicaram uma solubilização máxima de 87.77% do fósforo pelo A. terreus a partir do rejeito do minério de ferro, correspondendo a uma concentração de 286.38 mg L-1 de fósforo solúvel, ocorrido a um período de 168 horas de processo de biossolubilização, e assim, contribuindo a uma solubilização média de 1,70 mg h-1 de fósforo pela biomassa fúngica. Complementando, as imagens microfotográficas obtidas pela MEV e MET revelaram por meio de análise os aspectos morfológicos e estruturais do micélio e da composição celular do fungo, demonstrando a eficiente solubilização do fósforo pelo A. terreus. As informações reveladas por este estudo demonstram a eficiente solubilização do componente fósforo presente no rejeito do minério de ferro pelo fungo, resultando numa excelente tecnologia, e sugestiva aplicação na mineração, como uma alternativa para redução de custos de produção, favorecendo a sustentabilidade do sistema de mineração, e assim, contribuindo numa melhor qualidade do minério de ferro e numa provável finalidade do fósforo solúvel, como exemplo, na produção de fertilizantes fosfatados.