Research output: Contribution to journal › Article › peer-review
Fat globule size effect on visible and shortwave near infrared spectra of milk. / Bogomolov, Andrey; Melenteva, Anastasiia; Dahm, Donald J.
In: Journal of Near Infrared Spectroscopy, Vol. 21, No. 5, 06.11.2013, p. 435-440.Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - Fat globule size effect on visible and shortwave near infrared spectra of milk
AU - Bogomolov, Andrey
AU - Melenteva, Anastasiia
AU - Dahm, Donald J.
PY - 2013/11/6
Y1 - 2013/11/6
N2 - Step-wise homogenisation has been applied to raw milk samples of different composition to investigate the effect of fat globule size distribution on diffuse transmission spectra in the region 400-1100 nm. Homogenisation results in significant spectral changes with two distinct phases. Initial even growth of spectral intensity across the whole spectral range, observed at lower degrees of homogenisation, was followed by a drastic fall in absorbance at the long-wave end of spectrum as the fat globules reached some critical size. Fat and protein content in the sample significantly affected the observed dependences of spectra on the applied homogenisation time. These observations have been explained as a superposition of two effects: growing fat globule density and changes in scatter nature as the particle sizes approach the light wavelengths in a corresponding spectral range. The representative layer theory has been used to illustrate the nature of the spectral effects.
AB - Step-wise homogenisation has been applied to raw milk samples of different composition to investigate the effect of fat globule size distribution on diffuse transmission spectra in the region 400-1100 nm. Homogenisation results in significant spectral changes with two distinct phases. Initial even growth of spectral intensity across the whole spectral range, observed at lower degrees of homogenisation, was followed by a drastic fall in absorbance at the long-wave end of spectrum as the fat globules reached some critical size. Fat and protein content in the sample significantly affected the observed dependences of spectra on the applied homogenisation time. These observations have been explained as a superposition of two effects: growing fat globule density and changes in scatter nature as the particle sizes approach the light wavelengths in a corresponding spectral range. The representative layer theory has been used to illustrate the nature of the spectral effects.
KW - Homogenisation
KW - Light scattering
KW - Milk
KW - Near infrared spectroscopy
KW - Particle size effect
KW - Representative layer
UR - http://www.scopus.com/inward/record.url?scp=84886776920&partnerID=8YFLogxK
U2 - 10.1255/jnirs.1076
DO - 10.1255/jnirs.1076
M3 - Article
AN - SCOPUS:84886776920
VL - 21
SP - 435
EP - 440
JO - Journal of Near Infrared Spectroscopy
JF - Journal of Near Infrared Spectroscopy
SN - 0967-0335
IS - 5
ER -
ID: 41677709