32 research outputs found
Thermal Properties of Fruit Juices as a Function of Concentration and Temperature : the Photopyroelectric Assay
No full textThermal Properties of Fruit Juices as a Function of Concentration and Temperature : the Photopyroelectric Assay
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Gas coupled laser photothermal interferometry for non-destructive and non-contact studies of biological specimens.
No full textDetermination of Colligative Properties of Fruit Juices by Photopyroelectric Calorimetry
No full textLow frequency photoacoustics for monitoring the photobaric component in vivo of green leaves
No full textThe photoacoustic frequency spectrum under steady-state conditions from Philodendron green leaves attached to the plant was measured in the 0.2-200 Hz frequency range. The PA amplitude spectrum showed a maximum at low frequency (around 1 Hz) which was attributed to an optimum frequency for oxygen evolution. The signal decreased at a lower frequency, where the oxygen or carbondioxide uptake starts to become important. Efficiency of the oxygen evolution as a function of excitation light intensity was determined for different levels of background light
The anomalous behaviour of the PPE signal in the critical region of a phase transition-new support for the general theoretical model.
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Simple, simultaneous measurement of thermal parameters of a good thermal conductor using the inverse photopyroelectric technique.
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