HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Similar articles in this journal Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via Google Scholar Google Scholar Articles by Reddy, M. C. Articles by Dunham, J. R. Search for Related Content PubMed Articles by Reddy, M. C. Articles by Dunham, J. R.

Relationship of Methyl Sulfide and Flavor Score of Milk^{1, 2,}

Department of Dairy and Poultry Science, Kansas State University, Manhattan

ABSTRACT

Methyl sulfide (Me₂S) concentrations and organoleptic analyses of milk from poloxalene-treated and untreated cows fed bromegrass or rye pasture or freshly cut alfalfa were compared. These results were compared with those of the same analyses on composite samples from the University herd during the bromegrass and rye trials and those from two cows fed hay and grain during the alfalfa trial.

Me₂S levels in milk from both treated and untreated cows on bromegrass or rye pasture, as determined by gas-liquid chromatography, were less than 12 ppb. Milk produced from treated and untreated cows fed freshly cut alfalfa contained 36 and 31 ppb, respectively. Milk from the University herd during the bromegrass and rye trials had less than 11 ppb and from two cows fed hay and grain during the alfalfa trial, 11 ppb Me₂S. Only milk produced on freshly cut alfalfa had above-flavor-threshold levels of 19 ppb. Negative correlations were found between flavor scores and Me₂S concentrations.

Processing in a commercial vacuum pasteurizer removed 9.5% of the Me₂S and half of the acetone from milk, but alcohol concentrations were not affected. Laboratory pasteurization did not affect concentrations of volatile constituents of the milk.

¹ Contribution no. 646, Kansas Agricultural Experiment Station, Manhattan.

² Supported in part by a grant from Smith Kline and French Laboratories, Philadelphia, Pennsylvania.