Natural and laser-induced cavitation in corn stems: On the mechanisms of acoustic emissions

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Water in plant xylem is often superheated, and therefore in a meta-stable state. Under certain conditions, it may suddenly turn from the liquid to the vapor state. This cavitation process produces acoustic emissions. We report the measurement of ultrasonic acoustic emissions (UAE) produced by natura...

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Autores principales: Fernández, E., Fernández, R. J., Bilmes, Gabriel Mario
Formato: Articulo
Lenguaje:Inglés
Publicado: 2012
Materias:
Ingeniería
Acústica
Láser
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/83973
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-83973
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ingeniería
Acústica
Láser
spellingShingle Ingeniería
Acústica
Láser
Fernández, E.
Fernández, R. J.
Bilmes, Gabriel Mario
Natural and laser-induced cavitation in corn stems: On the mechanisms of acoustic emissions
topic_facet Ingeniería
Acústica
Láser
description Water in plant xylem is often superheated, and therefore in a meta-stable state. Under certain conditions, it may suddenly turn from the liquid to the vapor state. This cavitation process produces acoustic emissions. We report the measurement of ultrasonic acoustic emissions (UAE) produced by natural and induced cavitation in corn stems. We induced cavitation and UAE in vivo, in well controlled and reproducible experiments, by irradiating the bare stem of the plants with a continuous-wave laser beam. By tracing the source of UAE, we were able to detect absorption and frequency filtering of the UAE propagating through the stem. This technique allows the unique possibility of studying localized embolism of plant conduits, and thus to test hypotheses on the hydraulic architecture of plants. Based on our results, we postulate that the source of UAE is a transient “cavity oscillation” triggered by the disruptive effect of cavitation inception.
format Articulo
Articulo
author Fernández, E.
Fernández, R. J.
Bilmes, Gabriel Mario
author_facet Fernández, E.
Fernández, R. J.
Bilmes, Gabriel Mario
author_sort Fernández, E.
title Natural and laser-induced cavitation in corn stems: On the mechanisms of acoustic emissions
title_short Natural and laser-induced cavitation in corn stems: On the mechanisms of acoustic emissions
title_full Natural and laser-induced cavitation in corn stems: On the mechanisms of acoustic emissions
title_fullStr Natural and laser-induced cavitation in corn stems: On the mechanisms of acoustic emissions
title_full_unstemmed Natural and laser-induced cavitation in corn stems: On the mechanisms of acoustic emissions
title_sort natural and laser-induced cavitation in corn stems: on the mechanisms of acoustic emissions
publishDate 2012
url http://sedici.unlp.edu.ar/handle/10915/83973
work_keys_str_mv AT fernandeze naturalandlaserinducedcavitationincornstemsonthemechanismsofacousticemissions
AT fernandezrj naturalandlaserinducedcavitationincornstemsonthemechanismsofacousticemissions
AT bilmesgabrielmario naturalandlaserinducedcavitationincornstemsonthemechanismsofacousticemissions
bdutipo_str Repositorios
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