Acute growth inhibition &amp; toxicity analysis of nano-polystyrene spheres on Raphidocelis subcapitata

Reynolds, Anthony; Giltrap, Michelle; Chambers, Gary

doi:10.1016/j.ecoenv.2020.111153

Cited by 22 publications

(7 citation statements)

References 106 publications

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“…The use of osmium helped to avoid bias and gave a reasonably good images of algae sections, like technic proposed by Markovic et al (2020). The Raman spectrum of algae culture without the presence of rGO is shown in Figure 4(A), which is observed the presence of characteristic bands of algae cells, such as the band around 1536 cm-1 corresponding to the clear carotenoid which is present in any plant in its cellular structure (Jehlicka et al, 2019a,b;Andreeva and Velitchkova, 2014;Reynolds et. al., 2021).…”

Section: Al(mentioning

confidence: 89%

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Toxicidade e possível interação celular do Óxido de Grafeno Reduzido com Raphidoceles subcapitata: Análise ultraestrutural

Irazusta¹,

Ferreira²,

Balsamo³

et al. 2021

RSD

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O óxido de grafeno reduzido (rGO) é um nanomaterial formado por carbono, apresentado como um derivado do óxido de grafeno e, devido às suas propriedades, é utilizado em áreas como microeletrônica, mecânica e biomedicina. Apesar da grande quantidade de testes realizados com esse nanomaterial, ainda não há consenso sobre sua toxicidade, quando no meio ambiente. O meio aquático costuma ser o destino final desses compostos e, por isso, as algas verdes costumam ser utilizadas como bioindicador. Este estudo teve como objetivo determinar a ecotoxicidade e possíveis interações da nanopartícula de rGO com a célula de algas verdes de Raphidocelis subcapitata. As alterações estruturais nas algas, expostas a diferentes concentrações a rGO, foram analisadas através de microscopia eletrônica de transmissão (TEM) e espectroscopia Raman, a toxicidade foi avaliada por meio da medida de inibição da biomassa algal. Os resultados indicam que não houve efeito tóxico no organismo estudado, exceto na maior concentração (100 mg.L-1). A análise de TEM demonstrou uma interação das nanopartículas com a célula algal, pela observação da internalização das nanopartículas, bem como pela deposição de rGO na membrana celular. Apesar da ausência de toxicidade em baixas concentrações, os organismos mostraram sensibilidade à presença do rGO. Esses resultados contribuem com a literatura no esclarecimento do comportamento das nanopartículas à base de carbono no ambiente aquático e podem permitir um melhor cuidado com a produção e liberação dessas nanopartículas no meio ambiente.

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Section: Al(mentioning

confidence: 89%

“…al., 2021). Another band observed was around 1161 cm-1, which corresponds to another carotenoid common in plant and algae cells that act as a protector of chlorophyll (Gall et al, 2015;Parab and Tomar, 2012;Reynolds et. al., 2021).…”

Section: Al(mentioning

confidence: 99%

Toxicidade e possível interação celular do Óxido de Grafeno Reduzido com Raphidoceles subcapitata: Análise ultraestrutural

Irazusta¹,

Ferreira²,

Balsamo³

et al. 2021

RSD

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“…When they are healthy, they present a sickle shape that they usually can change when they suffer damage or physiological changes. 39,40…”

Section: Methodsmentioning

confidence: 99%

“…When they are healthy, they present a sickle shape that they usually can change when they suffer damage or physiological changes. 39,40 Algae were provided by ECOTEST, Valencia, (SC2B1214). The culture medium pH was adjusted at 8.1 ± 0.2 and prepared according to supplier specifications.…”

Section: Luminescence Inhibition Assay On a Fischeri Bioindicatormentioning

confidence: 99%

Ecotoxicological study of bio-based deep eutectic solvents formed by glycerol derivatives in two aquatic biomodels

et al. 2022

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“…Several related works have reported such concerns. For example, Reynolds and coworkers recently elucidated the environmental toxicity of nano-polystyrene spheres as a model for representing micro/nanoplastics on Raphidocelis subcapitata algae [ 99 ]. The result showed that the exposure of a range of concentration of 100 nm polystyrene spheres (NPS) for 72 h induced growth inhibition up to 33.7%.…”

Section: Comparison Of Nanocarriers and Their Challengesmentioning

confidence: 99%

Nanosphere Structures Using Various Materials: A Strategy for Signal Amplification for Virus Sensing

Muttaqien

Khoris

Pambudi³

et al. 2022

Sensors

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Nanomaterials have been explored in the sensing research field in the last decades. Mainly, 3D nanomaterials have played a vital role in advancing biomedical applications, and less attention was given to their application in the field of biosensors for pathogenic virus detection. The versatility and tunability of a wide range of nanomaterials contributed to the development of a rapid, portable biosensor platform. In this review, we discuss 3D nanospheres, one of the classes of nanostructured materials with a homogeneous and dense matrix wherein a guest substance is carried within the matrix or on its surface. This review is segmented based on the type of nanosphere and their elaborative application in various sensing techniques. We emphasize the concept of signal amplification strategies using different nanosphere structures constructed from a polymer, carbon, silica, and metal–organic framework (MOF) for rendering high-level sensitivity of virus detection. We also briefly elaborate on some challenges related to the further development of nanosphere-based biosensors, including the toxicity issue of the used nanomaterial and the commercialization hurdle.

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Acute growth inhibition & toxicity analysis of nano-polystyrene spheres on Raphidocelis subcapitata

Cited by 22 publications

References 106 publications

Toxicidade e possível interação celular do Óxido de Grafeno Reduzido com Raphidoceles subcapitata: Análise ultraestrutural

Toxicidade e possível interação celular do Óxido de Grafeno Reduzido com Raphidoceles subcapitata: Análise ultraestrutural

Ecotoxicological study of bio-based deep eutectic solvents formed by glycerol derivatives in two aquatic biomodels

Nanosphere Structures Using Various Materials: A Strategy for Signal Amplification for Virus Sensing

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