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Photoacoustic Technique in the Study of Photosynthesis in Aquatic Lirium (Eichhornia Crassipes)

Published online by Cambridge University Press:  17 December 2012

A. Calderón*
Affiliation:
Instituto Politécnico Nacional, Centro de Investigación en Ciencia Aplicada y Tecnología Avanzada, Av. Legaria # 694 Col. Irrigación, C.P. 11500, México D.F. México
A. Cardona
Affiliation:
Instituto Politécnico Nacional, Centro de Investigación en Ciencia Aplicada y Tecnología Avanzada, Av. Legaria # 694 Col. Irrigación, C.P. 11500, México D.F. México
G. Juárez Gracia
Affiliation:
Instituto Politécnico Nacional, Centro de Investigación en Ciencia Aplicada y Tecnología Avanzada, Av. Legaria # 694 Col. Irrigación, C.P. 11500, México D.F. México
E. Marín
Affiliation:
Instituto Politécnico Nacional, Centro de Investigación en Ciencia Aplicada y Tecnología Avanzada, Av. Legaria # 694 Col. Irrigación, C.P. 11500, México D.F. México
Cesar Mora
Affiliation:
Instituto Politécnico Nacional, Centro de Investigación en Ciencia Aplicada y Tecnología Avanzada, Av. Legaria # 694 Col. Irrigación, C.P. 11500, México D.F. México
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Abstract

We report, for the first time, the application of the photoacoustic spectroscopy for monitoring the optical absorption spectra in aquatic lirium (Eichhornia Crassipes), before and after it was exposed to ultrasonic irradiations. We obtained a decrease in the amplitude of the bands of the chlorophylls a and b for the irradiated samples with ultrasound of 17 kHz and 1.5 mW/cm2 of power density, and therefore, damage in the centers producing the photosynthesis, due to the irradiation. These results show the utility of the ultrasonic irradiation, as well as, of the photosynthesis monitoring by means of the photoacoustic technique, for the elaboration and establishment of methodologies in the control of this aquatic plant, whose propagation causes many consequences extremely unfavorable for the environment, as well as for the diverse human activities that are developed in the bodies of water in the tropical and sub-tropical regions of the world.

Type
Articles
Copyright
Copyright © Materials Research Society 2012 

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References

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