Depth profiles of double layer biological samples, obtained by photoacoustic spectroscopy, have been studied using the phase-resolved method. The application of the method was demonstrated by insulating out the spectra of the cuticle and the pigment layers of a lettuce leaf. Using this method, we were able to monitor the phase shift between the cuticle and the pigment layers as a function of the time elapsed after herbicide spraying. The temporal changes occurring in lettuce leaves under the action of dehydration were also investigated.
机构:
CTR TECN AEROSP, INST ESTUDOS AVANCADOS, BR-12200 SAN JOSE CAMPOS, SP, BRAZILCTR TECN AEROSP, INST ESTUDOS AVANCADOS, BR-12200 SAN JOSE CAMPOS, SP, BRAZIL
CESAR, CL
VARGAS, H
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CTR TECN AEROSP, INST ESTUDOS AVANCADOS, BR-12200 SAN JOSE CAMPOS, SP, BRAZILCTR TECN AEROSP, INST ESTUDOS AVANCADOS, BR-12200 SAN JOSE CAMPOS, SP, BRAZIL
VARGAS, H
MIRANDA, LCM
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CTR TECN AEROSP, INST ESTUDOS AVANCADOS, BR-12200 SAN JOSE CAMPOS, SP, BRAZILCTR TECN AEROSP, INST ESTUDOS AVANCADOS, BR-12200 SAN JOSE CAMPOS, SP, BRAZIL