8 documents found, page 1 of 1

Impact of wastewater-borne nanoparticles of silver and titanium dioxide on the ...

Due to their widespread use, silver (Ag) and titanium dioxide (TiO2) nanoparticles (NPs) are commonly discharged into aquatic environments via wastewater treatment plants. The study was aimed to assess the effects of wastewater-borne AgNPs (NM-300 K; 15.5 ± 2.4 nm; 25-125 μg L-1) and TiO2NPs (NM-105; 23.1 ± 6.2 nm; 12.5-100 μg L-1), from a laboratory-scale wastewater treatment plant, on Daphnia magna, at indivi...

Basagran® induces developmental malformations and changes the bacterial communi...

This study aimed to assess the effects of Basagran® on zebrafish (Danio rerio) embryos. The embryos were exposed to Basagran® at concentrations ranging from 120.0 to 480.6 mg/L, and the effects on embryo development (up to 96 h) and bacterial communities of 96 h-larvae were assessed. The embryo development response was time-dependent and concentration-dependent (106.35 < EC50 < 421.58 mg/L). The sensitivity of ...

Searching for Algaecide or Algaestatic Effects of Several Plant Extracts on Phy...

Study Design: Experimental research. Place and Duration of Study: The cyanobacterium Anabaena cylindrica and the green alga Chlorella vulgaris were used as test strains to evaluate the effects of plant extracts on algal growth. All experiments were undertaken in the Agricultural School of Bragança - Polytechnic Institute, from September 2010 to July 2011. Methodology: Essential oils were obtained by means of hy...

Morphological, biochemical and molecular characterization of Anabaena, Aphanizo...

Studies of cyanobacterial nostocacean taxa are important to the global scientific community, mainly because a significant number of beneficial strains that belong to the order Nostocales fix atmospheric nitrogen, thus contributing to the fertility of agricultural soils worldwide, while others behave as nuisance microorganisms in aquatic ecosystemsdue to their involvement in toxic bloom events. However, in spiteofth...

Fatty acid characterization of cyanobacterial strains isolated from Vela lake a...

Avaliação do potencial algicida/algistático de extractos vegetais em microalgas...

Fatty acid characterization of cyanobacterial strains isolated from vela lake a...

It is know that cyanobacterial taxonomic groups are characterized by particular lipid patterns that can be used as their biological markers. The present study examined the fatty acid composition of nostocacean heterocystous cyanobacterial strains isolated from Central-western Portuguese freshwater shallow water bodies, namely Vela Lake and rice fields from Mondego River Basin. Morphological characterization sho...

Avaliação do potencial algicida/algistático de extractos de plantas em microalg...

Devido à eutrofização, os sistemas aquáticos podem apresentar um desenvolvimento excessivo de fitoplâncton e algas filamentosas, com a concomitante diminuição da qualidade da água.. Para mitigar os problemas ambientais e económicos resultantes, têm sido implementadas medidas que abrangem a aplicação de algicidas e a redução do input de nutrientes. Contudo, alguns algicidas convencionais apresentam certas limita...