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In-vitro assessment of biocides effect on two activated-sludge filamentous bact...

Ferreira, Vânia Isabel Lopes; Dias, Nicolina M.; Mota, Manuel; Pereira, Maria Olívia; Nicolau, Ana

Wastewater treatment is the world largest biotechnology in the world and stands for the defense of public health on one side and the protection of the natural aquatic ecosystems on the other. Activated-sludge process (AS) is the most widely used technique for wastewater treatment. The AS bacterial communities include floc-forming and non-floc-forming organisms, the latter mostly filamentous bacteria. AS goals o...


The first sequenced Sphaerotilus natans bacteriophage- characterization and pot...

Ferreira, Rute Vanessa Novais; Amado, R.; Padrão, Jorge; Ferreira, V.; Dias, Nicolina M.; Melo, Luís Daniel Rodrigues; Santos, Sílvio Roberto Branco

Bacteriophages (phages) are ubiquitous entities present in every conceivable habitat as a result of their bacterial parasitism. Their prevalence and impact in the ecology of bacterial communities and their ability to control pathogens make their characterization essential, particularly of new phages, improving knowledge and potential application. The isolation and characterization of a new lytic phage against S...


Nitrifying soil bacterium Nitrosomonas europaea: operational improvement of sta...

Padrão, Jorge; Tortella, Gonzalo; Cortez, Susana; Dias, Nicolina M.; Nicolau, Ana; Mota, Manuel

Nitrosomonas europaea is the most extensively studied ammonia-oxidizing bacterium (AOB), being a ubiquitous player in the conversion of ammonia in the soil environment. The precipitation of constituents of the standard culture medium, American Type Culture Collection (ATCC) \#2265, further hinders both the study of N. europaea vital role in the nitrogen cycle and the development of biotechnological applications...


Impact of professional cleaning agent used in fish-canning industry in wastewat...

Ferreira, V.; Cortez, Susana; Padrão, Jorge; Mesquita, D. P.; Dias, Nicolina M.; Duarte, Maria Salomé; Ferreira, Eugénio C.; Alves, M. M.; Mota, M.

Fish-canning industry represents an important and denoting industry both in Portugal and in the EU. It is estimated that 20 Portuguese industries produced in 2013 approximately 47 thousand tonnes of fish canned commodities, generating 234 million [1, 2]. To maintain food safety standards, the use of biocides in the fish-canning facilities cleaning procedures is mandatory [3]. One of the biocides used is the com...


Epidemiology of dermatophytoses in 31 municipalities of the province of Buenos ...

Mazza, Mariana; Refojo, Nicolás; Davel, Graciela; Lima, Nelson; Dias, Nicolina M.; Silva, Cosme M. F. P. da; Canteros, Cristina E.

Background No reliable data are available in the province of Buenos Aires regarding the frequency of dermatophytoses and other fungal diseases. The distribution of the clinical forms and the species involved are also unknown. Aims To present the data collected by the laboratories participating in the Mycology Network of the province of Buenos Aires (MNPBA) from a retrospective epidemiological survey on dermatop...


Use of biocides in the control of filamentous bulking in activated-sludge

Ferreira, V.; Dias, Nicolina M.; Pereira, Maria Olívia; Mota, Manuel; Nicolau, Ana

[Excerpt] Filamentous bulking can be controlled by specific and/or non-specific methods. Specific methods intend to recognize and resolve the major causes of filamentous bacterial proliferation and are preferred because they are selective for the target microorganism and cause limited damage to the remaining biomass. In what concerns non-specific methods, chlorination was one of the first methods to be used to ...


Antimicrobial peptides from agro-industrial waste a key to new antibiotics

Botelho, Cláudia M.; Padrão, Jorge; Fernandes, Margarida; Dias, Nicolina M.; Teixeira, J. A.


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