UV protection of Euglenoids: Computation of the electromagnetic response

Euglenoids are a group of predominantly free-living unicellular microorganisms that mostly live in freshwater bodies but can also be found in marine and brackish waters. These organisms have a characteristic that distinguishes them form the other protists: they are covered by a surface pellicle form...

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Autores principales:	Valencia, Claudio Ismael, Skigin, Diana Carina, Inchaussandague, Marina Elizabeth, Conforti, Visitación Teresa Dora
Publicado:	2015
Materias:	microalgae natural photonic structures photonic simulation method UV protection Algae Bioinformatics Diffraction Diffraction gratings Microbiology Microorganisms Photonics Protozoa Ultraviolet radiation Biological structures Electromagnetic response Electron microscopy images Micro-algae Photonic structure Protection mechanisms Unicellular microorganisms Radiation protection
Acceso en línea:	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_16057422_v9531_n_p_Dolinko http://hdl.handle.net/20.500.12110/paper_16057422_v9531_n_p_Dolinko
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	paper:paper_16057422_v9531_n_p_Dolinko
record_format	dspace
spelling	paper:paper_16057422_v9531_n_p_Dolinko2023-06-08T16:25:03Z UV protection of Euglenoids: Computation of the electromagnetic response Valencia, Claudio Ismael Skigin, Diana Carina Inchaussandague, Marina Elizabeth Conforti, Visitación Teresa Dora microalgae natural photonic structures photonic simulation method UV protection Algae Bioinformatics Diffraction Diffraction gratings Microbiology Microorganisms Photonics Protozoa Ultraviolet radiation Biological structures Electromagnetic response Electron microscopy images Micro-algae Photonic structure Protection mechanisms Unicellular microorganisms UV protection Radiation protection Euglenoids are a group of predominantly free-living unicellular microorganisms that mostly live in freshwater bodies but can also be found in marine and brackish waters. These organisms have a characteristic that distinguishes them form the other protists: they are covered by a surface pellicle formed by S-shaped overlapping bands which resemble a diffraction grating. These microorganisms have developed numerous protection mechanisms intended to avoid or reduce the damage produced by UV radiation, such as the production of pigments and the repair mechanisms in hours of darkness and during daylight. In a recent paper we have investigated the role played by the pellicle of Euglenoids in the protection of the cell against UV radiation, by means of an electromagnetic approach based on the approximation of the pellicle profile by a one-dimensional diffraction grating. This simplified model allowed us to confirm that under certain incidence conditions, the corrugation of the pellicle helps increase the UV reflection, and consequently, diminish the UV radiation that enters the cell. In order to analyze the electromagnetic response of the whole cell, we extend two different approaches to calculate the reflected response: a simulation method especially developed to deal with complex biological structures that permits the introduction of the scattering object via an electron microscopy image, and the integral method, which has been widely used to compute the electromagnetic response of finite structures. Numerical results of near and far fields are shown. © 2015 Copyright SPIE. Fil:Valencia, C. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Skigin, D.C. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Inchaussandague, M.E. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Conforti, V. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2015 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_16057422_v9531_n_p_Dolinko http://hdl.handle.net/20.500.12110/paper_16057422_v9531_n_p_Dolinko
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-134
collection	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic	microalgae natural photonic structures photonic simulation method UV protection Algae Bioinformatics Diffraction Diffraction gratings Microbiology Microorganisms Photonics Protozoa Ultraviolet radiation Biological structures Electromagnetic response Electron microscopy images Micro-algae Photonic structure Protection mechanisms Unicellular microorganisms UV protection Radiation protection
spellingShingle	microalgae natural photonic structures photonic simulation method UV protection Algae Bioinformatics Diffraction Diffraction gratings Microbiology Microorganisms Photonics Protozoa Ultraviolet radiation Biological structures Electromagnetic response Electron microscopy images Micro-algae Photonic structure Protection mechanisms Unicellular microorganisms UV protection Radiation protection Valencia, Claudio Ismael Skigin, Diana Carina Inchaussandague, Marina Elizabeth Conforti, Visitación Teresa Dora UV protection of Euglenoids: Computation of the electromagnetic response
topic_facet	microalgae natural photonic structures photonic simulation method UV protection Algae Bioinformatics Diffraction Diffraction gratings Microbiology Microorganisms Photonics Protozoa Ultraviolet radiation Biological structures Electromagnetic response Electron microscopy images Micro-algae Photonic structure Protection mechanisms Unicellular microorganisms UV protection Radiation protection
description	Euglenoids are a group of predominantly free-living unicellular microorganisms that mostly live in freshwater bodies but can also be found in marine and brackish waters. These organisms have a characteristic that distinguishes them form the other protists: they are covered by a surface pellicle formed by S-shaped overlapping bands which resemble a diffraction grating. These microorganisms have developed numerous protection mechanisms intended to avoid or reduce the damage produced by UV radiation, such as the production of pigments and the repair mechanisms in hours of darkness and during daylight. In a recent paper we have investigated the role played by the pellicle of Euglenoids in the protection of the cell against UV radiation, by means of an electromagnetic approach based on the approximation of the pellicle profile by a one-dimensional diffraction grating. This simplified model allowed us to confirm that under certain incidence conditions, the corrugation of the pellicle helps increase the UV reflection, and consequently, diminish the UV radiation that enters the cell. In order to analyze the electromagnetic response of the whole cell, we extend two different approaches to calculate the reflected response: a simulation method especially developed to deal with complex biological structures that permits the introduction of the scattering object via an electron microscopy image, and the integral method, which has been widely used to compute the electromagnetic response of finite structures. Numerical results of near and far fields are shown. © 2015 Copyright SPIE.
author	Valencia, Claudio Ismael Skigin, Diana Carina Inchaussandague, Marina Elizabeth Conforti, Visitación Teresa Dora
author_facet	Valencia, Claudio Ismael Skigin, Diana Carina Inchaussandague, Marina Elizabeth Conforti, Visitación Teresa Dora
author_sort	Valencia, Claudio Ismael
title	UV protection of Euglenoids: Computation of the electromagnetic response
title_short	UV protection of Euglenoids: Computation of the electromagnetic response
title_full	UV protection of Euglenoids: Computation of the electromagnetic response
title_fullStr	UV protection of Euglenoids: Computation of the electromagnetic response
title_full_unstemmed	UV protection of Euglenoids: Computation of the electromagnetic response
title_sort	uv protection of euglenoids: computation of the electromagnetic response
publishDate	2015
url	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_16057422_v9531_n_p_Dolinko http://hdl.handle.net/20.500.12110/paper_16057422_v9531_n_p_Dolinko
work_keys_str_mv	AT valenciaclaudioismael uvprotectionofeuglenoidscomputationoftheelectromagneticresponse AT skigindianacarina uvprotectionofeuglenoidscomputationoftheelectromagneticresponse AT inchaussandaguemarinaelizabeth uvprotectionofeuglenoidscomputationoftheelectromagneticresponse AT confortivisitacionteresadora uvprotectionofeuglenoidscomputationoftheelectromagneticresponse
_version_	1768543964637429760

UV protection of Euglenoids: Computation of the electromagnetic response

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