Analysis of the interaction of Ag and ZnO nanoparticles in Phaseolus vulgaris
Autor(a) principal: | |
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Data de Publicação: | 2019 |
Tipo de documento: | Tese |
Idioma: | eng |
Título da fonte: | Biblioteca Digital de Teses e Dissertações da USP |
Texto Completo: | https://www.teses.usp.br/teses/disponiveis/64/64135/tde-08092021-140249/ |
Resumo: | Nanoecotoxicology is a growing field of science driven by the extensive use of nanomaterials in commercial products and agriculture. Their use in agriculture is to become a reality through fertilizers and pesticides. On the other hand, little is known about possible collateral effects that of nanomaterials and therefore they may pose a threat to human health and the environment. To shed light on these topics, one must better understand the mechanisms of interaction between nanoparticles (NP) and living beings. Seed treatment is a common practice that provides micronutrients and protection. This study investigated the effects of ZnO and Ag NP on the germination of Phaseolus vulgaris seeds and the interaction (uptake and biotransformation) with the seed coat. Zinc-based nanoparticles were chosen because it is a plant micronutrient, whilst Ag ones present antimicrobial activity. The common bean seed treatments and synchrotron analysis were performed at the ID21 beamline in ESRF, CENA-USP and XRF beamline in LNLS. The bean seed coat presents three different layers, which are one of the objects of this study. The seeds were exposed to Ag2S NP, Ag metallic NP, ZnO NP, AgNO3 and ZnSO4 in different concentrations (Ag 100 and 1000 mg L-1 while Zn 100, 1000 and 5000 mg L-1). After 5 days of post-treatment and germination, seed coats were recovered, sectioned and investigated by FTIR, -XRF and -XANES. -XRF analysis showed that most of the NP treatments remained trapped in the seed coat, while -XANES unraveled that depending on the composition of pristine materials they can be biotransformed. Finally, FTIR pointed out that the proportion of organic functional groups present in the seed tissue were modified due to the presence of NP |
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Analysis of the interaction of Ag and ZnO nanoparticles in Phaseolus vulgarisAnálise da interação de nanoparticulas de Ag e ZnO em Phaseolus vulgarisAbsorção de raios XAg nanoparticleEspectroscopia de infravermelho por transformada de FourierEspectroscopia de raios XFluorescência de raios XFourier transform infrared spectroscopyGerminaçãoGerminationNanopartícula AgNanopartícula de ZnOPhaseolus vulgarisPhaseolus vulgarisSynchrotron-based techniquesTécnicas baseadas em síncrotronX-ray absorptionX-ray fluorescenceX-ray spectroscopyZnO nanoparticleNanoecotoxicology is a growing field of science driven by the extensive use of nanomaterials in commercial products and agriculture. Their use in agriculture is to become a reality through fertilizers and pesticides. On the other hand, little is known about possible collateral effects that of nanomaterials and therefore they may pose a threat to human health and the environment. To shed light on these topics, one must better understand the mechanisms of interaction between nanoparticles (NP) and living beings. Seed treatment is a common practice that provides micronutrients and protection. This study investigated the effects of ZnO and Ag NP on the germination of Phaseolus vulgaris seeds and the interaction (uptake and biotransformation) with the seed coat. Zinc-based nanoparticles were chosen because it is a plant micronutrient, whilst Ag ones present antimicrobial activity. The common bean seed treatments and synchrotron analysis were performed at the ID21 beamline in ESRF, CENA-USP and XRF beamline in LNLS. The bean seed coat presents three different layers, which are one of the objects of this study. The seeds were exposed to Ag2S NP, Ag metallic NP, ZnO NP, AgNO3 and ZnSO4 in different concentrations (Ag 100 and 1000 mg L-1 while Zn 100, 1000 and 5000 mg L-1). After 5 days of post-treatment and germination, seed coats were recovered, sectioned and investigated by FTIR, -XRF and -XANES. -XRF analysis showed that most of the NP treatments remained trapped in the seed coat, while -XANES unraveled that depending on the composition of pristine materials they can be biotransformed. Finally, FTIR pointed out that the proportion of organic functional groups present in the seed tissue were modified due to the presence of NPA nanoecotoxicologia é um crescente campo da ciência impulsionado pelo uso extensivo de nanomateriais em produtos comerciais e na agricultura. Seu uso na agricultura está se tornando uma realidade através de fertilizantes e pesticidas. Por outro lado, pouco se sabe sobre possíveis efeitos colaterais dos nanomateriais e, portanto, podem representar uma ameaça à saúde humana e ao meio ambiente. Para esclarecer esses tópicos, é preciso entender melhor os mecanismos de interação entre nanopartículas (NP) e seres vivos. O tratamento de sementes é uma prática comum que fornece micronutrientes e proteção. Este estudo investigou os efeitos de ZnO e Ag NP na germinação de sementes de Phaseolus vulgaris e a interação (absorção e biotransformação) com o tegumento da semente. As nanopartículas à base de zinco foram escolhidas pelo Zn ser um micronutriente da planta, enquanto as da Ag apresentam atividade antimicrobiana. Os tratamentos de sementes de feijoeiro comum e análise síncrotron foram realizados na linha de luz ID21 da linha de luz ESRF, CENA-USP e XRF no LNLS. A casca do feijão apresenta três diferentes camadas, que são um dos objetos deste estudo. As sementes foram expostas a Ag2S NP, Ag NP metálico, ZnO NP, AgNO3 e ZnSO4 em diferentes concentrações (Ag 100 e 1000 mg L-1, enquanto Zn 100, 1000 e 5000 mg L-1). Após 5 dias de pós-tratamento e germinação, as cascas das sementes foram separadas e seccionadas para serem investigadas por FTIR, -XRF e -XANES. A análise de -XRF mostrou que na maioria dos tratamentos com NP, elas permaneceram aprisionadas no tegumento da semente, enquanto -XANES revelou que, dependendo da composição dos materiais, eles podem ser biotransformados. Finalmente, FTIR apontou que uma parte de grupos funcionais orgânicos presentes no tecido das sementes foi modificada devido à presença de NPBiblioteca Digitais de Teses e Dissertações da USPCarvalho, Hudson Wallace Pereira deMichel, Hiram Armando CastilloSavassa, Susilaine Maira2019-08-30info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/doctoralThesisapplication/pdfhttps://www.teses.usp.br/teses/disponiveis/64/64135/tde-08092021-140249/reponame:Biblioteca Digital de Teses e Dissertações da USPinstname:Universidade de São Paulo (USP)instacron:USPLiberar o conteúdo para acesso público.info:eu-repo/semantics/openAccesseng2023-05-24T13:58:48Zoai:teses.usp.br:tde-08092021-140249Biblioteca Digital de Teses e Dissertaçõeshttp://www.teses.usp.br/PUBhttp://www.teses.usp.br/cgi-bin/mtd2br.plvirginia@if.usp.br|| atendimento@aguia.usp.br||virginia@if.usp.bropendoar:27212023-05-24T13:58:48Biblioteca Digital de Teses e Dissertações da USP - Universidade de São Paulo (USP)false |
dc.title.none.fl_str_mv |
Analysis of the interaction of Ag and ZnO nanoparticles in Phaseolus vulgaris Análise da interação de nanoparticulas de Ag e ZnO em Phaseolus vulgaris |
title |
Analysis of the interaction of Ag and ZnO nanoparticles in Phaseolus vulgaris |
spellingShingle |
Analysis of the interaction of Ag and ZnO nanoparticles in Phaseolus vulgaris Savassa, Susilaine Maira Absorção de raios X Ag nanoparticle Espectroscopia de infravermelho por transformada de Fourier Espectroscopia de raios X Fluorescência de raios X Fourier transform infrared spectroscopy Germinação Germination Nanopartícula Ag Nanopartícula de ZnO Phaseolus vulgaris Phaseolus vulgaris Synchrotron-based techniques Técnicas baseadas em síncrotron X-ray absorption X-ray fluorescence X-ray spectroscopy ZnO nanoparticle |
title_short |
Analysis of the interaction of Ag and ZnO nanoparticles in Phaseolus vulgaris |
title_full |
Analysis of the interaction of Ag and ZnO nanoparticles in Phaseolus vulgaris |
title_fullStr |
Analysis of the interaction of Ag and ZnO nanoparticles in Phaseolus vulgaris |
title_full_unstemmed |
Analysis of the interaction of Ag and ZnO nanoparticles in Phaseolus vulgaris |
title_sort |
Analysis of the interaction of Ag and ZnO nanoparticles in Phaseolus vulgaris |
author |
Savassa, Susilaine Maira |
author_facet |
Savassa, Susilaine Maira |
author_role |
author |
dc.contributor.none.fl_str_mv |
Carvalho, Hudson Wallace Pereira de Michel, Hiram Armando Castillo |
dc.contributor.author.fl_str_mv |
Savassa, Susilaine Maira |
dc.subject.por.fl_str_mv |
Absorção de raios X Ag nanoparticle Espectroscopia de infravermelho por transformada de Fourier Espectroscopia de raios X Fluorescência de raios X Fourier transform infrared spectroscopy Germinação Germination Nanopartícula Ag Nanopartícula de ZnO Phaseolus vulgaris Phaseolus vulgaris Synchrotron-based techniques Técnicas baseadas em síncrotron X-ray absorption X-ray fluorescence X-ray spectroscopy ZnO nanoparticle |
topic |
Absorção de raios X Ag nanoparticle Espectroscopia de infravermelho por transformada de Fourier Espectroscopia de raios X Fluorescência de raios X Fourier transform infrared spectroscopy Germinação Germination Nanopartícula Ag Nanopartícula de ZnO Phaseolus vulgaris Phaseolus vulgaris Synchrotron-based techniques Técnicas baseadas em síncrotron X-ray absorption X-ray fluorescence X-ray spectroscopy ZnO nanoparticle |
description |
Nanoecotoxicology is a growing field of science driven by the extensive use of nanomaterials in commercial products and agriculture. Their use in agriculture is to become a reality through fertilizers and pesticides. On the other hand, little is known about possible collateral effects that of nanomaterials and therefore they may pose a threat to human health and the environment. To shed light on these topics, one must better understand the mechanisms of interaction between nanoparticles (NP) and living beings. Seed treatment is a common practice that provides micronutrients and protection. This study investigated the effects of ZnO and Ag NP on the germination of Phaseolus vulgaris seeds and the interaction (uptake and biotransformation) with the seed coat. Zinc-based nanoparticles were chosen because it is a plant micronutrient, whilst Ag ones present antimicrobial activity. The common bean seed treatments and synchrotron analysis were performed at the ID21 beamline in ESRF, CENA-USP and XRF beamline in LNLS. The bean seed coat presents three different layers, which are one of the objects of this study. The seeds were exposed to Ag2S NP, Ag metallic NP, ZnO NP, AgNO3 and ZnSO4 in different concentrations (Ag 100 and 1000 mg L-1 while Zn 100, 1000 and 5000 mg L-1). After 5 days of post-treatment and germination, seed coats were recovered, sectioned and investigated by FTIR, -XRF and -XANES. -XRF analysis showed that most of the NP treatments remained trapped in the seed coat, while -XANES unraveled that depending on the composition of pristine materials they can be biotransformed. Finally, FTIR pointed out that the proportion of organic functional groups present in the seed tissue were modified due to the presence of NP |
publishDate |
2019 |
dc.date.none.fl_str_mv |
2019-08-30 |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/doctoralThesis |
format |
doctoralThesis |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
https://www.teses.usp.br/teses/disponiveis/64/64135/tde-08092021-140249/ |
url |
https://www.teses.usp.br/teses/disponiveis/64/64135/tde-08092021-140249/ |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
|
dc.rights.driver.fl_str_mv |
Liberar o conteúdo para acesso público. info:eu-repo/semantics/openAccess |
rights_invalid_str_mv |
Liberar o conteúdo para acesso público. |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.coverage.none.fl_str_mv |
|
dc.publisher.none.fl_str_mv |
Biblioteca Digitais de Teses e Dissertações da USP |
publisher.none.fl_str_mv |
Biblioteca Digitais de Teses e Dissertações da USP |
dc.source.none.fl_str_mv |
reponame:Biblioteca Digital de Teses e Dissertações da USP instname:Universidade de São Paulo (USP) instacron:USP |
instname_str |
Universidade de São Paulo (USP) |
instacron_str |
USP |
institution |
USP |
reponame_str |
Biblioteca Digital de Teses e Dissertações da USP |
collection |
Biblioteca Digital de Teses e Dissertações da USP |
repository.name.fl_str_mv |
Biblioteca Digital de Teses e Dissertações da USP - Universidade de São Paulo (USP) |
repository.mail.fl_str_mv |
virginia@if.usp.br|| atendimento@aguia.usp.br||virginia@if.usp.br |
_version_ |
1809090524195323904 |