Aline Zigiotto

Centro Nacional de Pesquisa em Energia e Materiais | CNPEM · LNNano

This paper reports the synthesis and characterization of a graphene oxide–gold nanohybrid (GO-Au) and evaluates its suitability as a test material, e.g., in nano(eco)toxicological studies. In this study, we synthesised graphene oxide (GO) and used it as a substrate for the growth of nano-Au decorations, via the chemical reduction of gold (III) usin...

The aquatic ecosystem is the final destination of most industrial residues and agrochemicals resulting in organisms being exposed to a complex mixture of contaminants. Nanomaterials (NMs) are being increasingly applied in many technologies and industrial sectors, so there is an increasing concern about the negative impacts of NMs in the environment...

Graphene oxide (GO) is a promising and strategic carbon-based nanomaterial for innovative and disruptive technologies. It is therefore essential to address its environmental health and safety aspects. In this work, we evaluated the chemical degradation of graphene oxide by sodium hypochlorite (NaClO, bleach water) and its consequences over toxicity...

This work reports an integrated nanosafety study including the synthesis and characterization of the graphene oxide-silver nanoparticle hybrid material (GO-AgNPs) and its nano-ecotoxicity evaluation in the zebrafish embryo model. The influences of natural organic matter (NOM) and a chorion embryo membrane were considered in this study, looking towa...

In this work, we evaluated the effect of protein corona formation on graphene oxide (GO) mixture toxicity testing (i.e., co-exposure) using the Daphnia magna model and assessing acute toxicity determined as immobilisation. Cadmium (Cd2+) and bovine serum albumin (BSA) were selected as co-pollutant and protein model system, respectively. Albumin cor...

In this work, we evaluated the effect of protein corona formation on graphene oxide(GO) mixture toxicity testing (i.e., co-exposure) using theDaphnia magnamodel and assessing acutetoxicity determined as immobilisation. Cadmium (Cd2+) and bovine serum albumin (BSA) wereselected as co-pollutant and protein model system, respectively. Albumin corona f...

Nanopesticides is a promising technology for agricultural productivity and innovation. The emergent field of nanopesticides associated with their safety evaluation provides an excellent opportunity for scientists, industry, policy makers, and civil society to interact and share their experiences regarding sustainable agriculture and environmental p...

This short note aims to report in detail a preliminary assessment of the concentrations of Cd, Hg and Pb in tissues of blue crabs Callinectes danae collected from the Cananéia-Iguape-Peruíbe estuarine complex (CIP), in the South of São Paulo State coast, Brazil. In October 2014, blue crabs were collected from CIP. Tissues were removed by dissection...

Graphene oxide (GO) is part of a new set of nanomaterials with particular characteristics related to its nanoscale size. Due to this feature, it presents high reactivity and other contaminants present in the environment could bind to them and affect its intrinsic toxicity. The metabolic effects of such nanomaterials and their combination with two c...

The multifunctional magneto-luminescent nanoparticles are biocompatible, showing no acute toxicity to the zebrafish embryos. The nanoparticle uptake and biodistribution are followed via synchrotron X-ray fluorescence imaging, which manifests their uptake predominantly through oral exposition and localizes the bioaccumulation in the embryo's gastroi...

Procedimentos de oxidação química são comumente aplicados a nanotubos de carbono a fim de favorecer sua dispersão coloidal e interação com matrizes biológicas. Entretanto, estes métodos apresentam potenciais riscos ambientais e ocupacionais. Neste trabalho, pela primeira vez na literatura, nanotubos de carbono de paredes múltiplas comerciais (r-NTC...

The risk assessment of nanomaterials (NMs) is essential for regulatory purposes and for sustainable nanotechnological development. Although the application of the graphene oxide (GO) has been widely exploited, its environmental risk is not well understood since several environmental conditions can affect the behavior and toxicity of it. In the pres...

The present short communication reports the occurrence of Nile Tilapia (Oreochromis niloticus) in the Mandira River, in the extractive reserve in the Cananéia estuary, São Paulo State. In May 2014, using dip nets, we collected five specimens of O. niloticus in the estuary, with length ranging from 1.4 to 2.5 cm and weight between 0.8 and 2.3 g. Sam...

We evaluated oxygen consumption and ammonia excretion by juveniles of the pink shrimp Farfantepenaeus paulensis at three different temperatures (15, 20 and 25 degrees C). The shrimp were collected in the coastal region of Cananeia, SAo Paulo State, Brazil. The selected temperatures are the limits recorded in aquaculture tanks in the coastal region...

Seeking the identification of Angiostrongylus cantonensis as a potential etiological agent of three clinical cases of eosinophilic meningitis, mollusc specimens were collected in the state of Espírito Santo, Brazil. The snails were identified as Sarasinula marginata (45 specimens), Subulina octona (157), Achatina fulica (45) and Bradybaena similari...