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AMBIENTUM BIOETHICA BIOLOGIA CHEMIA DIGITALIA DRAMATICA EDUCATIO ARTIS GYMNAST. ENGINEERING EPHEMERIDES EUROPAEA GEOGRAPHIA GEOLOGIA HISTORIA HISTORIA ARTIUM INFORMATICA IURISPRUDENTIA MATHEMATICA MUSICA NEGOTIA OECONOMICA PHILOLOGIA PHILOSOPHIA PHYSICA POLITICA PSYCHOLOGIA-PAEDAGOGIA SOCIOLOGIA THEOLOGIA CATHOLICA THEOLOGIA CATHOLICA LATIN THEOLOGIA GR.-CATH. VARAD THEOLOGIA ORTHODOXA THEOLOGIA REF. TRANSYLVAN
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STUDIA PHYSICA - Ediţia nr.SPECIAL ISSUE din 2001 | |||||||
Articol: |
FRONT PHOTOPYROELECTRIC METHOD FOR THERMAL EFFUSIVITY MEASUREMENTS OF SOME FOODSTUFFS. Autori: D. DADARLAT, X. FILIP, C. NEAMŢU, G. NAGY, VASILE SURDUCAN, A. PAŞCA. |
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Rezumat: The photopyroelectric calorimetry, in the front configuration, was applied in order to measure the thermal effusivity of some foodstuffs. The front configuration with thermally thick sensor and sample, and optically opaque sensor, was used for analysing the thermal properties of some fats. The information was obtained via a frequency scan of the phase of the pyroelectric signal. The main advantages of this configuration on the other two front schemes proposed before are: (i) one has not to use very thin foils or expensive semitransparent sensors; (ii) the information is contained in the phase of the signal (and not in the amplitude - as usual) which is not dependent on the power fluctuations of the radiation source. | |||||||
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