Linked Life Data

19447980

Source:http://linkedlifedata.com/resource/pubmed/id/19447980

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
6
pubmed:dateCreated
2009-5-18
pubmed:abstractText
Our first objective was to optimize center wavelengths and bandwidths for virtual filters used in a Fourier transform mid-infrared (MIR) milk analyzer. Optimization was accomplished by adjusting center wavelengths and bandwidths to minimize the size of intercorrection factors. Once optimized, the virtual filters were defined as follows: fat B sample, 3.508 microm (2,851 cm(-1)), and bandwidth of 0.032 microm (26 cm(-1)); fat B reference, 3.556 microm (2812 cm(-1)), and bandwidth of 0.030 microm (24 cm(-1)); lactose sample, 9.542 microm (1,048 cm(-1)), and bandwidth of 0.092 microm (20 cm(-1)); lactose reference, 7.734 microm (1,293 cm(-1)), and bandwidth of 0.084 microm (14 cm(-1)); protein sample, 6.489 microm (1,541 cm(-1)), and bandwidth of 0.085 microm (20 cm(-1)); protein reference, 6.707 microm (1491 cm(-1)), and bandwidth of 0.054 microm (12 cm(-1)); fat A sample, 5.721 microm (1,748 cm(-1)), and bandwidth of 0.052 microm (16 cm(-1)); fat A reference, 5.583 microm (1,791 cm(-1)), and bandwidth of 0.050 microm (16 cm(-1)). The bandwidth and its proximity to areas of intense water absorption had the largest effect on the intercorrection factors. The second objective was to quantify the impact of fatty acid chain length and unsaturation on fat B and fat A MIR measurements. Increasing the chain length increased the difference (i.e., MIR minus reference) between MIR prediction and reference chemistry by 0.0429% and by -0.0566% fat per unit of increase in carbon number per 1% change in fat, for fat B and fat A, respectively. Increasing the unsaturation decreased the difference (i.e., MIR minus reference) between MIR prediction of fat and chemistry for fat B by -0.4021% and increased fat A by 0.0291% fat per unit of increase in double bonds per 1% change in fat concentration.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Jun
pubmed:issn
1525-3198
pubmed:author
pubmed:issnType
Electronic
pubmed:volume
92
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
2485-501
pubmed:meshHeading
pubmed:year
2009
pubmed:articleTitle
Influence of fatty acid chain length and unsaturation on mid-infrared milk analysis.
pubmed:affiliation
Northeast Dairy Foods Research Center, Department of Food Science, Cornell University, Ithaca, NY 14853, USA.
pubmed:publicationType
Journal Article, Research Support, U.S. Gov't, Non-P.H.S.