Natural and laser - induced cavitation in corn stems on the mechanisms of acoustic emissions
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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| Formato: | Artículo |
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| Acceso en línea: | http://ri.agro.ar/files/download/articulo/2012fernandez1.pdf LINK AL EDITOR |
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| 100 | 1 | |a Fernández, E. |9 61057 | |
| 245 | 0 | 0 | |a Natural and laser - induced cavitation in corn stems |b on the mechanisms of acoustic emissions |
| 520 | |a 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 irradiat- ing 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 propagat- ing 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. | ||
| 653 | 0 | |a CAVITATION | |
| 653 | 0 | |a ACOUSTIC EMISSION | |
| 700 | 1 | |9 6385 |a Fernández, Roberto Javier | |
| 700 | 1 | |a Bilmes, Gabriel M. |9 73031 | |
| 773 | |t Papers in Physics |g Vol.4 (2012), p.1-8 | ||
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| 900 | |a 10.4279/PIP.040003 | ||
| 900 | |a ^tNatural and laser - induced cavitation in corn stems^son the mechanisms of acoustic emissions | ||
| 900 | |a ^aFernández^bE. | ||
| 900 | |a ^aFernández^bR. J. | ||
| 900 | |a ^aBilmes^bG. M. | ||
| 900 | |a ^aFernández^bE. | ||
| 900 | |a ^aFernández^bRoberto Javier | ||
| 900 | |a ^aBilmes^bGabriel M. | ||
| 900 | |a ^aFernández^bE.^tIFEVA, Facultad de Agronomía, Universidad de Buenos Aires y CONICET, Av. San Martín 4453, C1417DSE Buenos Aires, Argentina. | ||
| 900 | |a ^aFernández^bRoberto Javier^tIFEVA, Facultad de Agronomía, Universidad de Buenos Aires y CONICET, Av. San Martín 4453, C1417DSE Buenos Aires, Argentina. | ||
| 900 | |a ^aBilmes^bGabriel M.^tCentro de Investigaciones Opticas [CONICET-CIC] y Facultad de Ingeniería, Universidad Nacional de La Plata, Casilla de Correo 124, 1900 La Plata, Argentina- E-mail: gabrielb@ciop.unlp.edu.ar | ||
| 900 | |a ^tPapers in Physics | ||
| 900 | |a en | ||
| 900 | |a p.1 | ||
| 900 | |a Vol.4 (2012) | ||
| 900 | |a 8 | ||
| 900 | |a CAVITATION | ||
| 900 | |a ACOUSTIC EMISSION | ||
| 900 | |a Water in plant xylem is often superheated, and therefore in a meta-stable state. | ||
| 900 | |a Under certain conditions, it may suddenly turn from the liquid to the vapor state. This cavitation process produces acoustic emissions. | ||
| 900 | |a We report the measurement of ultrasonic acoustic emissions [UAE] produced by natural and induced cavitation in corn stems. | ||
| 900 | |a We induced cavitation and UAE in vivo, in well controlled and reproducible experiments, by irradiat- ing the bare stem of the plants with a continuous-wave laser beam. | ||
| 900 | |a By tracing the source of UAE, we were able to detect absorption and frequency filtering of the UAE propagat- ing through the stem. | ||
| 900 | |a This technique allows the unique possibility of studying localized embolism of plant conduits, and thus to test hypotheses on the hydraulic architecture of | ||
| 900 | |a plants. | ||
| 900 | |a Based on our results, we postulate that the source of UAE is a transient - cavity oscillation triggered by the disruptive effect of cavitation inception. | ||
| 900 | |a 2012 | ||
| 900 | |a AAG | ||
| 900 | |a 2012fernandez1 | ||
| 900 | |a http://ri.agro.ar/files/download/articulo/2012fernandez1.pdf | ||
| 900 | |a www.papersinphysics.org | ||
| 900 | |a GM | ||
| 900 | |a GM | ||
| 900 | |a BP | ||
| 900 | |a BP | ||
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