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Full-Text Articles in Life Sciences

Fortification Of Reduced Fat Cheddar Cheese With N-3 Fatty Acids: Effect On Off-Flavor Generation, Silvana Martini, J. E. Thurgood, C. Brothersen, Robert E. Ward, D. J. Mcmahon May 2009

Fortification Of Reduced Fat Cheddar Cheese With N-3 Fatty Acids: Effect On Off-Flavor Generation, Silvana Martini, J. E. Thurgood, C. Brothersen, Robert E. Ward, D. J. Mcmahon

Nutrition, Dietetics, and Food Sciences Faculty Publications

The objective of this study was to fortify 50% reduced fat Cheddar cheese with n-3 fatty acids and evaluate whether this fortification generated specific off-flavors in the cheese. Docosahexaenoic (DHA) and eicosapentaenoic (EPA) fatty acids were added to the cheese to obtain 3 final fortification levels [18, 35, and 71mg of DHA/EPA per serving size (28g) of cheese] representing 10, 20, and 40% of the suggested daily intake level for DHA/EPA. The presence of oxidized, rancid, and fishy flavors as a function of fortification level and cheese aging (6 mo) was evaluated using a sensory descriptive panel. No differences were …


Increasing Omega Fatty Acid Content In Milk Through Cow’S Diet: Effect On Milk Flavor, K. A. S. Nelson, Silvana Martini Apr 2009

Increasing Omega Fatty Acid Content In Milk Through Cow’S Diet: Effect On Milk Flavor, K. A. S. Nelson, Silvana Martini

Nutrition, Dietetics, and Food Sciences Faculty Publications

Milk with an increased content of eicosapentaenoic acid (EPA), docosahexaenoic acid (DHA), and conjugated linoleic acid (CLA) was obtained by incorporating fish oil into the feed of cows. The 4 feed treatments used were a control diet of 57% forage and 43% concentrate mix with EnerGII fat supplement at 1.65% of dietary DM, or EnerGII in the basal diet was partially replaced with 1) 0.21% partially ruminally inert calcium salts of 71% fish oil given at 0.41% of DM; 2) 0.41% inert calcium salts of 71% fish oil given at 0.83% of DM; or 3) 0.83% inert calcium salts of …


Comparison Of The Complete Genome Sequencesof Bifidobacterium Animalis Subsp. Lactis Dsm 10140 And Bl-04, R. Barrangou, E. P. Briczinski, L. L. Traeger, J. R. Loquasto, M. Richards, P. Horvath, A. C. Coute-Monvoisin, G. Leyer, S. Rendulic, J. L. Steele, Jeff Broadbent, T. Oberg, E. G. Dudley, S. Schuster, D. A. Romero, R. F. Roberts Jan 2009

Comparison Of The Complete Genome Sequencesof Bifidobacterium Animalis Subsp. Lactis Dsm 10140 And Bl-04, R. Barrangou, E. P. Briczinski, L. L. Traeger, J. R. Loquasto, M. Richards, P. Horvath, A. C. Coute-Monvoisin, G. Leyer, S. Rendulic, J. L. Steele, Jeff Broadbent, T. Oberg, E. G. Dudley, S. Schuster, D. A. Romero, R. F. Roberts

Nutrition, Dietetics, and Food Sciences Faculty Publications

Bifidobacteria are important members of the human gut flora, especially in infants. Comparative genomic analysis of two Bifidobacterium animalis subsp. lactis strains revealed evolution by internal deletion of consecutive spacer-repeat units within a novel clustered regularly interspaced short palindromic repeat locus, which represented the largest differential content between the two genomes. Additionally, 47 single nucleotide polymorphisms were identified, consisting primarily of nonsynonymous mutations, indicating positive selection and/or recent divergence. A particular nonsynonymous mutation in a putative glucose transporter was linked to a negative phenotypic effect on the ability of the variant to catabolize glucose, consistent with a modification in the …


Effect Of Oil Content And Processing Conditions On The Thermal Behavior And Physicochemical Stability Of Oil-In-Water Emulsions, Megan Tippetts, Silvana Martini Jan 2009

Effect Of Oil Content And Processing Conditions On The Thermal Behavior And Physicochemical Stability Of Oil-In-Water Emulsions, Megan Tippetts, Silvana Martini

Nutrition, Dietetics, and Food Sciences Faculty Publications

The destabilisation mechanism of oil-in-water (o/w) emulsions was studied as a function of oil content (20% and 40% o/w), homogenisation conditions and crystallisation temperatures (10, 5, 0, −5 and −10 °C). A mixture of anhydrous milk fat and soya bean oil was used as the lipid phase and whey protein isolate (2 wt%) as emulsifier. Crystallisation and melting behaviours were analysed using differential scanning calorimetry. Physicochemical stability was measured with a vertical scan macroscopic analyser. Emulsions with 20% oil were found to be less stable than those with 40% oil. For 20% o/w emulsions, the crystallisation was delayed and inhibited …