Dielectric properties of mammalian breast milk at radiofrequencies
- 1 May 1986
- journal article
- research article
- Published by IOP Publishing in Physics in Medicine & Biology
- Vol. 31 (5), 555-561
- https://doi.org/10.1088/0031-9155/31/5/008
Abstract
The relative permittivity and AC conductivity of breast milk have been investigated in four different mammalian species, human, cow, goat and sheep, in the frequency range 0.1-100 MHz and at a room temperature of 26.5+or-0.5 degrees C. The results showed that the sheep milk exhibited the largest dielectric dispersion, followed in decreasing order by milks from the goat, cow and human. The dielectric data were fitted to the Debye and Cole-Cole structural equations and the fitted parameters have been presented for the different species. The curve-fitting analysis has shown that for all the milk samples the Cole-Cole model gave a better fit to the dielectric data than the Debye model, thus suggesting heterogeneity of structure in milk. On the basis of the Cole-Cole model, the relaxation times in the mammalian milks were found to be distributed about the mean values of 162+or-10, 171+or-9, 177+or-14, and 192+or-12 ns for human, cow, goat and sheep milks, respectively.This publication has 8 references indexed in Scilit:
- Dielectric characteristics of packed human erythrocytes with haemoglobins F, AA, AS and SSPhysics in Medicine & Biology, 1983
- Electrical conductivity of foremilk for detecting subclinical mastitis in cowsThe Journal of Agricultural Science, 1974
- The least-squares analysis of complex weighted data with dielectric applicationsJournal of Physics D: Applied Physics, 1973
- The detection of abnormal milk by electrical meansJournal of Dairy Research, 1968
- Dielectric Properties and Ion Mobility in ErythrocytesBiophysical Journal, 1966
- Die Temperaturabhängigkeit der Dielektrizitätskonstante von Blut bei NiederfrequenzZeitschrift für Naturforschung B, 1948
- Dispersion and Absorption in Dielectrics I. Alternating Current CharacteristicsThe Journal of Chemical Physics, 1941
- Specific Resistance of the Interior of the Red Blood CorpuscleNature, 1934