List of works by Helena C Silva de Assis

A multibiomarker evaluation of urban, industrial, and agricultural exposure of small characins in a large freshwater basin in southern Brazil.

scientific article published on 5 May 2015

Acute and long-term effects of trophic exposure to silver nanospheres in the central nervous system of a neotropical fish Hoplias intermedius

scientific article published on 11 October 2017

Analyses of paralytic shellfish toxins and biomarkers in a southern Brazilian reservoir.

scientific article published on 22 September 2009

Anticholinesterasic activity of endosulfan in Wistar rats.

scientific article published on 22 February 2011

Antioxidant imbalance and genotoxicity detected in fish induced by titanium dioxide nanoparticles (NpTiO2) and inorganic lead (PbII)

scientific article published on 28 January 2019

Antioxidant responses in estuarine invertebrates exposed to repeated oil spills: Effects of frequency and dosage in a field manipulative experiment.

scientific article published on 31 May 2016

Bioaccumulation and related effects of PCBs and organochlorinated pesticides in freshwater fish Hypostomus commersoni.

scientific article published on 9 July 2012

Biomarkers of waterborne copper exposure in the Neotropical fish Prochilodus lineatus.

scientific article published on 18 November 2015

Chronic genetic damages in Geophagus brasiliensis exposed to anthropic impact in estuarine lakes at Santa Catarina coast--southern of Brazil

scientific article published on 15 May 2011

Cloning, partial sequencing and expression analysis of the neural form of P450 aromatase (cyp19a1b) in the South America catfish Rhamdia quelen.

scientific article

Co-exposure to titanium dioxide nanoparticles (NpTiO) and lead at environmentally relevant concentrations in the Neotropical fish species Hoplias intermedius

scientific article published on 08 September 2018

Cytotoxicity and enzymatic biomarkers as early indicators of benthic responses to the soluble-fraction of diesel oil

scientific article published on 06 August 2018

Depuration time and sublethal effects of microcystins in a freshwater fish from water supply reservoir

scientific article published on 17 July 2018

Effects of ecologically relevant concentrations of cadmium in a freshwater fish

scientific article published on 7 April 2016

Effects of environmentally relevant concentrations of the anti-inflammatory drug diclofenac in freshwater fish Rhamdia quelen.

scientific article published on 3 February 2017

Effects of low concentrations of ibuprofen on freshwater fish Rhamdia quelen

scientific article published on 11 March 2018

Effects of trophic exposure to dexamethasone and diclofenac in freshwater fish

scientific article published on 02 February 2015

Effects of trophic exposure to diclofenac and dexamethasone on hematological parameters and immune response in freshwater fish.

scientific article

Embryotoxicity and biotransformation responses in zebrafish exposed to water-soluble fraction of crude oil

scientific article published on 15 March 2011

Estrogen-like effects in male goldfish co-exposed to fluoxetine and 17 alpha-ethinylestradiol.

scientific article published on 2 May 2013

Evaluation of Biochemical, Genetic and Hematological Biomarkers in a Commercial Catfish Rhamdia quelen Exposed to Diclofenac.

scientific article published on 20 November 2015

Evaluation of the water quality of the upper reaches of the main Southern Brazil river (Iguaçu river) through in situ exposure of the native siluriform Rhamdia quelen in cages.

scientific article

Evaluation of tributyltin subchronic effects in tropical freshwater fish (Astyanax bimaculatus, Linnaeus, 1758).

scientific article

Evaluation of waterborne exposure to oil spill 5 years after an accident in Southern Brazil

scientific article published on 13 May 2008

Exposure of Ancistrus multispinis (Regan, 1912, Pisces, Teleostei) to deltamethrin: effects on cellular immunity.

scientific article published on 26 July 2008

First report about saxitoxins in freshwater fish Hoplias malabaricus through trophic exposure

scientific article published on 10 November 2010

Hematologic and hepatic responses of the freshwater fish Hoplias malabaricus after saxitoxin exposure.

scientific article published on 8 February 2013

In situ assessment of a neotropical fish to evaluate pollution in a river receiving agricultural and urban wastewater

scientific article published on 16 October 2014

Inhibition of immune responses and related proteins in Rhamdia quelen exposed to diclofenac.

scientific article

Integrated assessment of sediment contaminant levels and biological responses in sentinel fish species Atherinella brasiliensis from a sub-tropical estuary in south Atlantic

scientific article published on 01 December 2018

Integrated biomarker response in catfish Hypostomus ancistroides by multivariate analysis in the Pirapó River, southern Brazil.

scientific article

Modulatory effect of nano TiO₂on Pb in Hoplias malabaricus trophically exposed.

scientific article published on 29 May 2014

Monitoring water quality in reservoirs for human supply through multi-biomarker evaluation in tropical fish.

scientific article published on 19 December 2011

Multibiomarker assessment of three Brazilian estuaries using oysters as bioindicators.

scientific article published on 20 July 2007

Multibiomarker in fish to evaluate a river used to water public supply

scientific article published on 15 May 2015

Multivariate and integrative approach to analyze multiple biomarkers in ecotoxicology: A field study in Neotropical region.

scientific article published on 04 August 2017

Neurotoxins in a water supply reservoir: An alert to environmental and human health.

scientific article published on 9 December 2016

Oxidative stress in two tropical species after exposure to diesel oil.

scientific article

Paracetamol causes endocrine disruption and hepatotoxicity in male fish Rhamdia quelen after subchronic exposure.

scientific article published on 8 May 2017

Potential risks of natural mercury levels to wild predator fish in an Amazon reservoir

scientific article published on 17 September 2011

Pseudoreplication and the usage of biomarkers in ecotoxicological bioassays.

scientific article published on 12 April 2017

Sublethal effects of waterborne herbicides in tropical freshwater fish.

scientific article published on 8 October 2011

The accumulation dynamics, elimination and risk assessment of paralytic shellfish toxins in fish from a water supply reservoir

scientific article published on 06 October 2018

The effect of trichlorfon on acetylcholinesterase activity and histopathology of cultivated fish Oreochromis niloticus

scientific article published on 19 October 2006

Toward sustainable environmental quality: Identifying priority research questions for Latin America.

scientific article published on 22 February 2018

Toxicity assessment of 2,4-D and MCPA herbicides in primary culture of fish hepatic cells.

scientific article published on January 2015

Toxicological effects of anthropogenic activities in Geophagus brasiliensis from a coastal river of southern Brazil: A biomarker approach

scientific article published on 22 February 2019

Use of hepatocytes from Hoplias malabaricus to characterize the toxicity of a complex mixture of lipophilic halogenated compounds

scientific article published on 10 January 2007

Using multibiomarker approach as a tool to improve the management plan for a Private Reserve of Natural Heritage (RPPN).

scientific article published on 16 February 2014

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